bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 1 | /* |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 2 | * Virtual page mapping |
ths | 5fafdf2 | 2007-09-16 21:08:06 +0000 | [diff] [blame] | 3 | * |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 4 | * Copyright (c) 2003 Fabrice Bellard |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Lesser General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2 of the License, or (at your option) any later version. |
| 10 | * |
| 11 | * This library is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14 | * Lesser General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Lesser General Public |
Blue Swirl | 8167ee8 | 2009-07-16 20:47:01 +0000 | [diff] [blame] | 17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 18 | */ |
Peter Maydell | 7b31bbc | 2016-01-26 18:16:56 +0000 | [diff] [blame] | 19 | #include "qemu/osdep.h" |
Markus Armbruster | da34e65 | 2016-03-14 09:01:28 +0100 | [diff] [blame] | 20 | #include "qapi/error.h" |
Stefan Weil | 777872e | 2014-02-23 18:02:08 +0100 | [diff] [blame] | 21 | #ifndef _WIN32 |
bellard | d5a8f07 | 2004-09-29 21:15:28 +0000 | [diff] [blame] | 22 | #endif |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 23 | |
Veronia Bahaa | f348b6d | 2016-03-20 19:16:19 +0200 | [diff] [blame] | 24 | #include "qemu/cutils.h" |
bellard | 6180a18 | 2003-09-30 21:04:53 +0000 | [diff] [blame] | 25 | #include "cpu.h" |
Paolo Bonzini | 63c9155 | 2016-03-15 13:18:37 +0100 | [diff] [blame] | 26 | #include "exec/exec-all.h" |
bellard | b67d9a5 | 2008-05-23 09:57:34 +0000 | [diff] [blame] | 27 | #include "tcg.h" |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 28 | #include "hw/qdev-core.h" |
Michael S. Tsirkin | 4485bd2 | 2015-03-11 07:56:34 +0100 | [diff] [blame] | 29 | #if !defined(CONFIG_USER_ONLY) |
Marcel Apfelbaum | 47c8ca5 | 2015-02-04 17:43:54 +0200 | [diff] [blame] | 30 | #include "hw/boards.h" |
Paolo Bonzini | 33c1187 | 2016-03-15 16:58:45 +0100 | [diff] [blame] | 31 | #include "hw/xen/xen.h" |
Michael S. Tsirkin | 4485bd2 | 2015-03-11 07:56:34 +0100 | [diff] [blame] | 32 | #endif |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 33 | #include "sysemu/kvm.h" |
Markus Armbruster | 2ff3de6 | 2013-07-04 15:09:22 +0200 | [diff] [blame] | 34 | #include "sysemu/sysemu.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 35 | #include "qemu/timer.h" |
| 36 | #include "qemu/config-file.h" |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 37 | #include "qemu/error-report.h" |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 38 | #if defined(CONFIG_USER_ONLY) |
Markus Armbruster | a9c9427 | 2016-06-22 19:11:19 +0200 | [diff] [blame] | 39 | #include "qemu.h" |
Jun Nakajima | 432d268 | 2010-08-31 16:41:25 +0100 | [diff] [blame] | 40 | #else /* !CONFIG_USER_ONLY */ |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 41 | #include "hw/hw.h" |
| 42 | #include "exec/memory.h" |
Paolo Bonzini | df43d49 | 2016-03-16 10:24:54 +0100 | [diff] [blame] | 43 | #include "exec/ioport.h" |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 44 | #include "sysemu/dma.h" |
Alexey Kardashevskiy | 9c60766 | 2017-03-02 13:36:11 +1100 | [diff] [blame] | 45 | #include "sysemu/numa.h" |
Christian Borntraeger | 79ca7a1 | 2017-03-07 15:19:08 +0100 | [diff] [blame] | 46 | #include "sysemu/hw_accel.h" |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 47 | #include "exec/address-spaces.h" |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 48 | #include "sysemu/xen-mapcache.h" |
Daniel P. Berrange | 0ab8ed1 | 2017-01-25 16:14:15 +0000 | [diff] [blame] | 49 | #include "trace-root.h" |
Dr. David Alan Gilbert | d3a5038 | 2017-02-24 18:28:32 +0000 | [diff] [blame] | 50 | |
Dr. David Alan Gilbert | e2fa71f | 2017-02-24 18:28:33 +0000 | [diff] [blame] | 51 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE |
| 52 | #include <fcntl.h> |
| 53 | #include <linux/falloc.h> |
| 54 | #endif |
| 55 | |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 56 | #endif |
Paolo Bonzini | 0d6d3c8 | 2012-11-14 15:45:02 +0100 | [diff] [blame] | 57 | #include "exec/cpu-all.h" |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 58 | #include "qemu/rcu_queue.h" |
Jan Kiszka | 4840f10 | 2015-06-18 18:47:22 +0200 | [diff] [blame] | 59 | #include "qemu/main-loop.h" |
Blue Swirl | 5b6dd86 | 2012-12-02 16:04:43 +0000 | [diff] [blame] | 60 | #include "translate-all.h" |
Pavel Dovgalyuk | 7615936 | 2015-09-17 19:25:07 +0300 | [diff] [blame] | 61 | #include "sysemu/replay.h" |
Blue Swirl | 0cac1b6 | 2012-04-09 16:50:52 +0000 | [diff] [blame] | 62 | |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 63 | #include "exec/memory-internal.h" |
Juan Quintela | 220c3eb | 2013-10-14 17:13:59 +0200 | [diff] [blame] | 64 | #include "exec/ram_addr.h" |
Paolo Bonzini | 508127e | 2016-01-07 16:55:28 +0300 | [diff] [blame] | 65 | #include "exec/log.h" |
Avi Kivity | 67d95c1 | 2011-12-15 15:25:22 +0200 | [diff] [blame] | 66 | |
Bharata B Rao | 9dfeca7 | 2016-05-12 09:18:12 +0530 | [diff] [blame] | 67 | #include "migration/vmstate.h" |
| 68 | |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 69 | #include "qemu/range.h" |
Michael S. Tsirkin | 794e8f3 | 2015-09-24 14:41:17 +0300 | [diff] [blame] | 70 | #ifndef _WIN32 |
| 71 | #include "qemu/mmap-alloc.h" |
| 72 | #endif |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 73 | |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 74 | //#define DEBUG_SUBPAGE |
ths | 1196be3 | 2007-03-17 15:17:58 +0000 | [diff] [blame] | 75 | |
pbrook | 99773bd | 2006-04-16 15:14:59 +0000 | [diff] [blame] | 76 | #if !defined(CONFIG_USER_ONLY) |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 77 | /* ram_list is read under rcu_read_lock()/rcu_read_unlock(). Writes |
| 78 | * are protected by the ramlist lock. |
| 79 | */ |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 80 | RAMList ram_list = { .blocks = QLIST_HEAD_INITIALIZER(ram_list.blocks) }; |
Avi Kivity | 62152b8 | 2011-07-26 14:26:14 +0300 | [diff] [blame] | 81 | |
| 82 | static MemoryRegion *system_memory; |
Avi Kivity | 309cb47 | 2011-08-08 16:09:03 +0300 | [diff] [blame] | 83 | static MemoryRegion *system_io; |
Avi Kivity | 62152b8 | 2011-07-26 14:26:14 +0300 | [diff] [blame] | 84 | |
Avi Kivity | f6790af | 2012-10-02 20:13:51 +0200 | [diff] [blame] | 85 | AddressSpace address_space_io; |
| 86 | AddressSpace address_space_memory; |
Avi Kivity | 2673a5d | 2012-10-02 18:49:28 +0200 | [diff] [blame] | 87 | |
Paolo Bonzini | 0844e00 | 2013-05-24 14:37:28 +0200 | [diff] [blame] | 88 | MemoryRegion io_mem_rom, io_mem_notdirty; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 89 | static MemoryRegion io_mem_unassigned; |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 90 | |
Paolo Bonzini | 7bd4f43 | 2014-05-14 17:43:22 +0800 | [diff] [blame] | 91 | /* RAM is pre-allocated and passed into qemu_ram_alloc_from_ptr */ |
| 92 | #define RAM_PREALLOC (1 << 0) |
| 93 | |
Paolo Bonzini | dbcb898 | 2014-06-10 19:15:24 +0800 | [diff] [blame] | 94 | /* RAM is mmap-ed with MAP_SHARED */ |
| 95 | #define RAM_SHARED (1 << 1) |
| 96 | |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 97 | /* Only a portion of RAM (used_length) is actually used, and migrated. |
| 98 | * This used_length size can change across reboots. |
| 99 | */ |
| 100 | #define RAM_RESIZEABLE (1 << 2) |
| 101 | |
pbrook | e2eef17 | 2008-06-08 01:09:01 +0000 | [diff] [blame] | 102 | #endif |
bellard | 9fa3e85 | 2004-01-04 18:06:42 +0000 | [diff] [blame] | 103 | |
Peter Maydell | 20bccb8 | 2016-10-24 16:26:49 +0100 | [diff] [blame] | 104 | #ifdef TARGET_PAGE_BITS_VARY |
| 105 | int target_page_bits; |
| 106 | bool target_page_bits_decided; |
| 107 | #endif |
| 108 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 109 | struct CPUTailQ cpus = QTAILQ_HEAD_INITIALIZER(cpus); |
bellard | 6a00d60 | 2005-11-21 23:25:50 +0000 | [diff] [blame] | 110 | /* current CPU in the current thread. It is only valid inside |
| 111 | cpu_exec() */ |
Paolo Bonzini | f240eb6 | 2015-08-26 00:17:58 +0200 | [diff] [blame] | 112 | __thread CPUState *current_cpu; |
pbrook | 2e70f6e | 2008-06-29 01:03:05 +0000 | [diff] [blame] | 113 | /* 0 = Do not count executed instructions. |
ths | bf20dc0 | 2008-06-30 17:22:19 +0000 | [diff] [blame] | 114 | 1 = Precise instruction counting. |
pbrook | 2e70f6e | 2008-06-29 01:03:05 +0000 | [diff] [blame] | 115 | 2 = Adaptive rate instruction counting. */ |
Paolo Bonzini | 5708fc6 | 2012-11-26 15:36:40 +0100 | [diff] [blame] | 116 | int use_icount; |
bellard | 6a00d60 | 2005-11-21 23:25:50 +0000 | [diff] [blame] | 117 | |
Peter Maydell | 20bccb8 | 2016-10-24 16:26:49 +0100 | [diff] [blame] | 118 | bool set_preferred_target_page_bits(int bits) |
| 119 | { |
| 120 | /* The target page size is the lowest common denominator for all |
| 121 | * the CPUs in the system, so we can only make it smaller, never |
| 122 | * larger. And we can't make it smaller once we've committed to |
| 123 | * a particular size. |
| 124 | */ |
| 125 | #ifdef TARGET_PAGE_BITS_VARY |
| 126 | assert(bits >= TARGET_PAGE_BITS_MIN); |
| 127 | if (target_page_bits == 0 || target_page_bits > bits) { |
| 128 | if (target_page_bits_decided) { |
| 129 | return false; |
| 130 | } |
| 131 | target_page_bits = bits; |
| 132 | } |
| 133 | #endif |
| 134 | return true; |
| 135 | } |
| 136 | |
pbrook | e2eef17 | 2008-06-08 01:09:01 +0000 | [diff] [blame] | 137 | #if !defined(CONFIG_USER_ONLY) |
Avi Kivity | 4346ae3 | 2012-02-10 17:00:01 +0200 | [diff] [blame] | 138 | |
Peter Maydell | 20bccb8 | 2016-10-24 16:26:49 +0100 | [diff] [blame] | 139 | static void finalize_target_page_bits(void) |
| 140 | { |
| 141 | #ifdef TARGET_PAGE_BITS_VARY |
| 142 | if (target_page_bits == 0) { |
| 143 | target_page_bits = TARGET_PAGE_BITS_MIN; |
| 144 | } |
| 145 | target_page_bits_decided = true; |
| 146 | #endif |
| 147 | } |
| 148 | |
Paolo Bonzini | 1db8abb | 2013-05-21 12:07:21 +0200 | [diff] [blame] | 149 | typedef struct PhysPageEntry PhysPageEntry; |
| 150 | |
| 151 | struct PhysPageEntry { |
Michael S. Tsirkin | 9736e55 | 2013-11-11 14:42:43 +0200 | [diff] [blame] | 152 | /* How many bits skip to next level (in units of L2_SIZE). 0 for a leaf. */ |
Michael S. Tsirkin | 8b79576 | 2013-11-11 14:51:56 +0200 | [diff] [blame] | 153 | uint32_t skip : 6; |
Michael S. Tsirkin | 9736e55 | 2013-11-11 14:42:43 +0200 | [diff] [blame] | 154 | /* index into phys_sections (!skip) or phys_map_nodes (skip) */ |
Michael S. Tsirkin | 8b79576 | 2013-11-11 14:51:56 +0200 | [diff] [blame] | 155 | uint32_t ptr : 26; |
Paolo Bonzini | 1db8abb | 2013-05-21 12:07:21 +0200 | [diff] [blame] | 156 | }; |
| 157 | |
Michael S. Tsirkin | 8b79576 | 2013-11-11 14:51:56 +0200 | [diff] [blame] | 158 | #define PHYS_MAP_NODE_NIL (((uint32_t)~0) >> 6) |
| 159 | |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 160 | /* Size of the L2 (and L3, etc) page tables. */ |
Paolo Bonzini | 57271d6 | 2013-11-07 17:14:37 +0100 | [diff] [blame] | 161 | #define ADDR_SPACE_BITS 64 |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 162 | |
Michael S. Tsirkin | 026736c | 2013-11-13 20:13:03 +0200 | [diff] [blame] | 163 | #define P_L2_BITS 9 |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 164 | #define P_L2_SIZE (1 << P_L2_BITS) |
| 165 | |
| 166 | #define P_L2_LEVELS (((ADDR_SPACE_BITS - TARGET_PAGE_BITS - 1) / P_L2_BITS) + 1) |
| 167 | |
| 168 | typedef PhysPageEntry Node[P_L2_SIZE]; |
Paolo Bonzini | 0475d94 | 2013-05-29 12:28:21 +0200 | [diff] [blame] | 169 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 170 | typedef struct PhysPageMap { |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 171 | struct rcu_head rcu; |
| 172 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 173 | unsigned sections_nb; |
| 174 | unsigned sections_nb_alloc; |
| 175 | unsigned nodes_nb; |
| 176 | unsigned nodes_nb_alloc; |
| 177 | Node *nodes; |
| 178 | MemoryRegionSection *sections; |
| 179 | } PhysPageMap; |
| 180 | |
Paolo Bonzini | 1db8abb | 2013-05-21 12:07:21 +0200 | [diff] [blame] | 181 | struct AddressSpaceDispatch { |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 182 | struct rcu_head rcu; |
| 183 | |
Fam Zheng | 729633c | 2016-03-01 14:18:24 +0800 | [diff] [blame] | 184 | MemoryRegionSection *mru_section; |
Paolo Bonzini | 1db8abb | 2013-05-21 12:07:21 +0200 | [diff] [blame] | 185 | /* This is a multi-level map on the physical address space. |
| 186 | * The bottom level has pointers to MemoryRegionSections. |
| 187 | */ |
| 188 | PhysPageEntry phys_map; |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 189 | PhysPageMap map; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 190 | AddressSpace *as; |
Paolo Bonzini | 1db8abb | 2013-05-21 12:07:21 +0200 | [diff] [blame] | 191 | }; |
| 192 | |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 193 | #define SUBPAGE_IDX(addr) ((addr) & ~TARGET_PAGE_MASK) |
| 194 | typedef struct subpage_t { |
| 195 | MemoryRegion iomem; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 196 | AddressSpace *as; |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 197 | hwaddr base; |
Vijaya Kumar K | 2615fab | 2016-10-24 16:26:49 +0100 | [diff] [blame] | 198 | uint16_t sub_section[]; |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 199 | } subpage_t; |
| 200 | |
Liu Ping Fan | b41aac4 | 2013-05-29 11:09:17 +0200 | [diff] [blame] | 201 | #define PHYS_SECTION_UNASSIGNED 0 |
| 202 | #define PHYS_SECTION_NOTDIRTY 1 |
| 203 | #define PHYS_SECTION_ROM 2 |
| 204 | #define PHYS_SECTION_WATCH 3 |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 205 | |
pbrook | e2eef17 | 2008-06-08 01:09:01 +0000 | [diff] [blame] | 206 | static void io_mem_init(void); |
Avi Kivity | 62152b8 | 2011-07-26 14:26:14 +0300 | [diff] [blame] | 207 | static void memory_map_init(void); |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 208 | static void tcg_commit(MemoryListener *listener); |
pbrook | e2eef17 | 2008-06-08 01:09:01 +0000 | [diff] [blame] | 209 | |
Avi Kivity | 1ec9b90 | 2012-01-02 12:47:48 +0200 | [diff] [blame] | 210 | static MemoryRegion io_mem_watch; |
Peter Maydell | 32857f4 | 2015-10-01 15:29:50 +0100 | [diff] [blame] | 211 | |
| 212 | /** |
| 213 | * CPUAddressSpace: all the information a CPU needs about an AddressSpace |
| 214 | * @cpu: the CPU whose AddressSpace this is |
| 215 | * @as: the AddressSpace itself |
| 216 | * @memory_dispatch: its dispatch pointer (cached, RCU protected) |
| 217 | * @tcg_as_listener: listener for tracking changes to the AddressSpace |
| 218 | */ |
| 219 | struct CPUAddressSpace { |
| 220 | CPUState *cpu; |
| 221 | AddressSpace *as; |
| 222 | struct AddressSpaceDispatch *memory_dispatch; |
| 223 | MemoryListener tcg_as_listener; |
| 224 | }; |
| 225 | |
Gerd Hoffmann | 8deaf12 | 2017-04-21 11:16:25 +0200 | [diff] [blame] | 226 | struct DirtyBitmapSnapshot { |
| 227 | ram_addr_t start; |
| 228 | ram_addr_t end; |
| 229 | unsigned long dirty[]; |
| 230 | }; |
| 231 | |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 232 | #endif |
bellard | 5493600 | 2003-05-13 00:25:15 +0000 | [diff] [blame] | 233 | |
Paul Brook | 6d9a130 | 2010-02-28 23:55:53 +0000 | [diff] [blame] | 234 | #if !defined(CONFIG_USER_ONLY) |
Avi Kivity | d6f2ea2 | 2012-02-12 20:12:49 +0200 | [diff] [blame] | 235 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 236 | static void phys_map_node_reserve(PhysPageMap *map, unsigned nodes) |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 237 | { |
Peter Lieven | 101420b | 2016-07-15 12:03:50 +0200 | [diff] [blame] | 238 | static unsigned alloc_hint = 16; |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 239 | if (map->nodes_nb + nodes > map->nodes_nb_alloc) { |
Peter Lieven | 101420b | 2016-07-15 12:03:50 +0200 | [diff] [blame] | 240 | map->nodes_nb_alloc = MAX(map->nodes_nb_alloc, alloc_hint); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 241 | map->nodes_nb_alloc = MAX(map->nodes_nb_alloc, map->nodes_nb + nodes); |
| 242 | map->nodes = g_renew(Node, map->nodes, map->nodes_nb_alloc); |
Peter Lieven | 101420b | 2016-07-15 12:03:50 +0200 | [diff] [blame] | 243 | alloc_hint = map->nodes_nb_alloc; |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 244 | } |
| 245 | } |
| 246 | |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 247 | static uint32_t phys_map_node_alloc(PhysPageMap *map, bool leaf) |
Avi Kivity | d6f2ea2 | 2012-02-12 20:12:49 +0200 | [diff] [blame] | 248 | { |
| 249 | unsigned i; |
Michael S. Tsirkin | 8b79576 | 2013-11-11 14:51:56 +0200 | [diff] [blame] | 250 | uint32_t ret; |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 251 | PhysPageEntry e; |
| 252 | PhysPageEntry *p; |
Avi Kivity | d6f2ea2 | 2012-02-12 20:12:49 +0200 | [diff] [blame] | 253 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 254 | ret = map->nodes_nb++; |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 255 | p = map->nodes[ret]; |
Avi Kivity | d6f2ea2 | 2012-02-12 20:12:49 +0200 | [diff] [blame] | 256 | assert(ret != PHYS_MAP_NODE_NIL); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 257 | assert(ret != map->nodes_nb_alloc); |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 258 | |
| 259 | e.skip = leaf ? 0 : 1; |
| 260 | e.ptr = leaf ? PHYS_SECTION_UNASSIGNED : PHYS_MAP_NODE_NIL; |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 261 | for (i = 0; i < P_L2_SIZE; ++i) { |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 262 | memcpy(&p[i], &e, sizeof(e)); |
Avi Kivity | d6f2ea2 | 2012-02-12 20:12:49 +0200 | [diff] [blame] | 263 | } |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 264 | return ret; |
Avi Kivity | d6f2ea2 | 2012-02-12 20:12:49 +0200 | [diff] [blame] | 265 | } |
| 266 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 267 | static void phys_page_set_level(PhysPageMap *map, PhysPageEntry *lp, |
| 268 | hwaddr *index, hwaddr *nb, uint16_t leaf, |
Avi Kivity | 2999097 | 2012-02-13 20:21:20 +0200 | [diff] [blame] | 269 | int level) |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 270 | { |
| 271 | PhysPageEntry *p; |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 272 | hwaddr step = (hwaddr)1 << (level * P_L2_BITS); |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 273 | |
Michael S. Tsirkin | 9736e55 | 2013-11-11 14:42:43 +0200 | [diff] [blame] | 274 | if (lp->skip && lp->ptr == PHYS_MAP_NODE_NIL) { |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 275 | lp->ptr = phys_map_node_alloc(map, level == 0); |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 276 | } |
Paolo Bonzini | db94604 | 2015-05-21 15:12:29 +0200 | [diff] [blame] | 277 | p = map->nodes[lp->ptr]; |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 278 | lp = &p[(*index >> (level * P_L2_BITS)) & (P_L2_SIZE - 1)]; |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 279 | |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 280 | while (*nb && lp < &p[P_L2_SIZE]) { |
Avi Kivity | 07f07b3 | 2012-02-13 20:45:32 +0200 | [diff] [blame] | 281 | if ((*index & (step - 1)) == 0 && *nb >= step) { |
Michael S. Tsirkin | 9736e55 | 2013-11-11 14:42:43 +0200 | [diff] [blame] | 282 | lp->skip = 0; |
Avi Kivity | c19e880 | 2012-02-13 20:25:31 +0200 | [diff] [blame] | 283 | lp->ptr = leaf; |
Avi Kivity | 07f07b3 | 2012-02-13 20:45:32 +0200 | [diff] [blame] | 284 | *index += step; |
| 285 | *nb -= step; |
Avi Kivity | 2999097 | 2012-02-13 20:21:20 +0200 | [diff] [blame] | 286 | } else { |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 287 | phys_page_set_level(map, lp, index, nb, leaf, level - 1); |
Avi Kivity | 2999097 | 2012-02-13 20:21:20 +0200 | [diff] [blame] | 288 | } |
| 289 | ++lp; |
Avi Kivity | f7bf546 | 2012-02-13 20:12:05 +0200 | [diff] [blame] | 290 | } |
| 291 | } |
| 292 | |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 293 | static void phys_page_set(AddressSpaceDispatch *d, |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 294 | hwaddr index, hwaddr nb, |
Avi Kivity | 2999097 | 2012-02-13 20:21:20 +0200 | [diff] [blame] | 295 | uint16_t leaf) |
bellard | 92e873b | 2004-05-21 14:52:29 +0000 | [diff] [blame] | 296 | { |
Avi Kivity | 2999097 | 2012-02-13 20:21:20 +0200 | [diff] [blame] | 297 | /* Wildly overreserve - it doesn't matter much. */ |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 298 | phys_map_node_reserve(&d->map, 3 * P_L2_LEVELS); |
bellard | 92e873b | 2004-05-21 14:52:29 +0000 | [diff] [blame] | 299 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 300 | phys_page_set_level(&d->map, &d->phys_map, &index, &nb, leaf, P_L2_LEVELS - 1); |
bellard | 92e873b | 2004-05-21 14:52:29 +0000 | [diff] [blame] | 301 | } |
| 302 | |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 303 | /* Compact a non leaf page entry. Simply detect that the entry has a single child, |
| 304 | * and update our entry so we can skip it and go directly to the destination. |
| 305 | */ |
Marc-André Lureau | efee678 | 2016-09-28 16:37:20 +0400 | [diff] [blame] | 306 | static void phys_page_compact(PhysPageEntry *lp, Node *nodes) |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 307 | { |
| 308 | unsigned valid_ptr = P_L2_SIZE; |
| 309 | int valid = 0; |
| 310 | PhysPageEntry *p; |
| 311 | int i; |
| 312 | |
| 313 | if (lp->ptr == PHYS_MAP_NODE_NIL) { |
| 314 | return; |
| 315 | } |
| 316 | |
| 317 | p = nodes[lp->ptr]; |
| 318 | for (i = 0; i < P_L2_SIZE; i++) { |
| 319 | if (p[i].ptr == PHYS_MAP_NODE_NIL) { |
| 320 | continue; |
| 321 | } |
| 322 | |
| 323 | valid_ptr = i; |
| 324 | valid++; |
| 325 | if (p[i].skip) { |
Marc-André Lureau | efee678 | 2016-09-28 16:37:20 +0400 | [diff] [blame] | 326 | phys_page_compact(&p[i], nodes); |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 327 | } |
| 328 | } |
| 329 | |
| 330 | /* We can only compress if there's only one child. */ |
| 331 | if (valid != 1) { |
| 332 | return; |
| 333 | } |
| 334 | |
| 335 | assert(valid_ptr < P_L2_SIZE); |
| 336 | |
| 337 | /* Don't compress if it won't fit in the # of bits we have. */ |
| 338 | if (lp->skip + p[valid_ptr].skip >= (1 << 3)) { |
| 339 | return; |
| 340 | } |
| 341 | |
| 342 | lp->ptr = p[valid_ptr].ptr; |
| 343 | if (!p[valid_ptr].skip) { |
| 344 | /* If our only child is a leaf, make this a leaf. */ |
| 345 | /* By design, we should have made this node a leaf to begin with so we |
| 346 | * should never reach here. |
| 347 | * But since it's so simple to handle this, let's do it just in case we |
| 348 | * change this rule. |
| 349 | */ |
| 350 | lp->skip = 0; |
| 351 | } else { |
| 352 | lp->skip += p[valid_ptr].skip; |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | static void phys_page_compact_all(AddressSpaceDispatch *d, int nodes_nb) |
| 357 | { |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 358 | if (d->phys_map.skip) { |
Marc-André Lureau | efee678 | 2016-09-28 16:37:20 +0400 | [diff] [blame] | 359 | phys_page_compact(&d->phys_map, d->map.nodes); |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 360 | } |
| 361 | } |
| 362 | |
Fam Zheng | 29cb533 | 2016-03-01 14:18:23 +0800 | [diff] [blame] | 363 | static inline bool section_covers_addr(const MemoryRegionSection *section, |
| 364 | hwaddr addr) |
| 365 | { |
| 366 | /* Memory topology clips a memory region to [0, 2^64); size.hi > 0 means |
| 367 | * the section must cover the entire address space. |
| 368 | */ |
Richard Henderson | 258dfaa | 2016-06-29 15:48:03 -0700 | [diff] [blame] | 369 | return int128_gethi(section->size) || |
Fam Zheng | 29cb533 | 2016-03-01 14:18:23 +0800 | [diff] [blame] | 370 | range_covers_byte(section->offset_within_address_space, |
Richard Henderson | 258dfaa | 2016-06-29 15:48:03 -0700 | [diff] [blame] | 371 | int128_getlo(section->size), addr); |
Fam Zheng | 29cb533 | 2016-03-01 14:18:23 +0800 | [diff] [blame] | 372 | } |
| 373 | |
Michael S. Tsirkin | 97115a8 | 2013-11-13 20:08:19 +0200 | [diff] [blame] | 374 | static MemoryRegionSection *phys_page_find(PhysPageEntry lp, hwaddr addr, |
Paolo Bonzini | 9affd6f | 2013-05-29 12:09:47 +0200 | [diff] [blame] | 375 | Node *nodes, MemoryRegionSection *sections) |
bellard | 92e873b | 2004-05-21 14:52:29 +0000 | [diff] [blame] | 376 | { |
Avi Kivity | 31ab2b4 | 2012-02-13 16:44:19 +0200 | [diff] [blame] | 377 | PhysPageEntry *p; |
Michael S. Tsirkin | 97115a8 | 2013-11-13 20:08:19 +0200 | [diff] [blame] | 378 | hwaddr index = addr >> TARGET_PAGE_BITS; |
Avi Kivity | 31ab2b4 | 2012-02-13 16:44:19 +0200 | [diff] [blame] | 379 | int i; |
Avi Kivity | f1f6e3b | 2011-11-20 17:52:22 +0200 | [diff] [blame] | 380 | |
Michael S. Tsirkin | 9736e55 | 2013-11-11 14:42:43 +0200 | [diff] [blame] | 381 | for (i = P_L2_LEVELS; lp.skip && (i -= lp.skip) >= 0;) { |
Avi Kivity | c19e880 | 2012-02-13 20:25:31 +0200 | [diff] [blame] | 382 | if (lp.ptr == PHYS_MAP_NODE_NIL) { |
Paolo Bonzini | 9affd6f | 2013-05-29 12:09:47 +0200 | [diff] [blame] | 383 | return §ions[PHYS_SECTION_UNASSIGNED]; |
Avi Kivity | 31ab2b4 | 2012-02-13 16:44:19 +0200 | [diff] [blame] | 384 | } |
Paolo Bonzini | 9affd6f | 2013-05-29 12:09:47 +0200 | [diff] [blame] | 385 | p = nodes[lp.ptr]; |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 386 | lp = p[(index >> (i * P_L2_BITS)) & (P_L2_SIZE - 1)]; |
Avi Kivity | f1f6e3b | 2011-11-20 17:52:22 +0200 | [diff] [blame] | 387 | } |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 388 | |
Fam Zheng | 29cb533 | 2016-03-01 14:18:23 +0800 | [diff] [blame] | 389 | if (section_covers_addr(§ions[lp.ptr], addr)) { |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 390 | return §ions[lp.ptr]; |
| 391 | } else { |
| 392 | return §ions[PHYS_SECTION_UNASSIGNED]; |
| 393 | } |
Avi Kivity | f3705d5 | 2012-03-08 16:16:34 +0200 | [diff] [blame] | 394 | } |
| 395 | |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 396 | bool memory_region_is_unassigned(MemoryRegion *mr) |
| 397 | { |
Paolo Bonzini | 2a8e749 | 2013-05-24 14:34:08 +0200 | [diff] [blame] | 398 | return mr != &io_mem_rom && mr != &io_mem_notdirty && !mr->rom_device |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 399 | && mr != &io_mem_watch; |
| 400 | } |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 401 | |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 402 | /* Called from RCU critical section */ |
Paolo Bonzini | c7086b4 | 2013-06-02 15:27:39 +0200 | [diff] [blame] | 403 | static MemoryRegionSection *address_space_lookup_region(AddressSpaceDispatch *d, |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 404 | hwaddr addr, |
| 405 | bool resolve_subpage) |
Jan Kiszka | 9f02960 | 2013-05-06 16:48:02 +0200 | [diff] [blame] | 406 | { |
Fam Zheng | 729633c | 2016-03-01 14:18:24 +0800 | [diff] [blame] | 407 | MemoryRegionSection *section = atomic_read(&d->mru_section); |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 408 | subpage_t *subpage; |
Fam Zheng | 729633c | 2016-03-01 14:18:24 +0800 | [diff] [blame] | 409 | bool update; |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 410 | |
Fam Zheng | 729633c | 2016-03-01 14:18:24 +0800 | [diff] [blame] | 411 | if (section && section != &d->map.sections[PHYS_SECTION_UNASSIGNED] && |
| 412 | section_covers_addr(section, addr)) { |
| 413 | update = false; |
| 414 | } else { |
| 415 | section = phys_page_find(d->phys_map, addr, d->map.nodes, |
| 416 | d->map.sections); |
| 417 | update = true; |
| 418 | } |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 419 | if (resolve_subpage && section->mr->subpage) { |
| 420 | subpage = container_of(section->mr, subpage_t, iomem); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 421 | section = &d->map.sections[subpage->sub_section[SUBPAGE_IDX(addr)]]; |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 422 | } |
Fam Zheng | 729633c | 2016-03-01 14:18:24 +0800 | [diff] [blame] | 423 | if (update) { |
| 424 | atomic_set(&d->mru_section, section); |
| 425 | } |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 426 | return section; |
Jan Kiszka | 9f02960 | 2013-05-06 16:48:02 +0200 | [diff] [blame] | 427 | } |
| 428 | |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 429 | /* Called from RCU critical section */ |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 430 | static MemoryRegionSection * |
Paolo Bonzini | c7086b4 | 2013-06-02 15:27:39 +0200 | [diff] [blame] | 431 | address_space_translate_internal(AddressSpaceDispatch *d, hwaddr addr, hwaddr *xlat, |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 432 | hwaddr *plen, bool resolve_subpage) |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 433 | { |
| 434 | MemoryRegionSection *section; |
Paolo Bonzini | 965eb2f | 2015-06-17 10:40:27 +0200 | [diff] [blame] | 435 | MemoryRegion *mr; |
Paolo Bonzini | a87f395 | 2014-02-07 15:47:46 +0100 | [diff] [blame] | 436 | Int128 diff; |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 437 | |
Paolo Bonzini | c7086b4 | 2013-06-02 15:27:39 +0200 | [diff] [blame] | 438 | section = address_space_lookup_region(d, addr, resolve_subpage); |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 439 | /* Compute offset within MemoryRegionSection */ |
| 440 | addr -= section->offset_within_address_space; |
| 441 | |
| 442 | /* Compute offset within MemoryRegion */ |
| 443 | *xlat = addr + section->offset_within_region; |
| 444 | |
Paolo Bonzini | 965eb2f | 2015-06-17 10:40:27 +0200 | [diff] [blame] | 445 | mr = section->mr; |
Paolo Bonzini | b242e0e | 2015-07-04 00:24:51 +0200 | [diff] [blame] | 446 | |
| 447 | /* MMIO registers can be expected to perform full-width accesses based only |
| 448 | * on their address, without considering adjacent registers that could |
| 449 | * decode to completely different MemoryRegions. When such registers |
| 450 | * exist (e.g. I/O ports 0xcf8 and 0xcf9 on most PC chipsets), MMIO |
| 451 | * regions overlap wildly. For this reason we cannot clamp the accesses |
| 452 | * here. |
| 453 | * |
| 454 | * If the length is small (as is the case for address_space_ldl/stl), |
| 455 | * everything works fine. If the incoming length is large, however, |
| 456 | * the caller really has to do the clamping through memory_access_size. |
| 457 | */ |
Paolo Bonzini | 965eb2f | 2015-06-17 10:40:27 +0200 | [diff] [blame] | 458 | if (memory_region_is_ram(mr)) { |
Paolo Bonzini | e4a511f | 2015-06-17 10:36:54 +0200 | [diff] [blame] | 459 | diff = int128_sub(section->size, int128_make64(addr)); |
Paolo Bonzini | 965eb2f | 2015-06-17 10:40:27 +0200 | [diff] [blame] | 460 | *plen = int128_get64(int128_min(diff, int128_make64(*plen))); |
| 461 | } |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 462 | return section; |
| 463 | } |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 464 | |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 465 | /* Called from RCU critical section */ |
Jason Wang | 052c8fa | 2016-12-30 18:09:13 +0800 | [diff] [blame] | 466 | IOMMUTLBEntry address_space_get_iotlb_entry(AddressSpace *as, hwaddr addr, |
| 467 | bool is_write) |
| 468 | { |
| 469 | IOMMUTLBEntry iotlb = {0}; |
| 470 | MemoryRegionSection *section; |
| 471 | MemoryRegion *mr; |
| 472 | |
| 473 | for (;;) { |
| 474 | AddressSpaceDispatch *d = atomic_rcu_read(&as->dispatch); |
| 475 | section = address_space_lookup_region(d, addr, false); |
| 476 | addr = addr - section->offset_within_address_space |
| 477 | + section->offset_within_region; |
| 478 | mr = section->mr; |
| 479 | |
| 480 | if (!mr->iommu_ops) { |
| 481 | break; |
| 482 | } |
| 483 | |
| 484 | iotlb = mr->iommu_ops->translate(mr, addr, is_write); |
| 485 | if (!(iotlb.perm & (1 << is_write))) { |
| 486 | iotlb.target_as = NULL; |
| 487 | break; |
| 488 | } |
| 489 | |
| 490 | addr = ((iotlb.translated_addr & ~iotlb.addr_mask) |
| 491 | | (addr & iotlb.addr_mask)); |
| 492 | as = iotlb.target_as; |
| 493 | } |
| 494 | |
| 495 | return iotlb; |
| 496 | } |
| 497 | |
| 498 | /* Called from RCU critical section */ |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 499 | MemoryRegion *address_space_translate(AddressSpace *as, hwaddr addr, |
| 500 | hwaddr *xlat, hwaddr *plen, |
| 501 | bool is_write) |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 502 | { |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 503 | IOMMUTLBEntry iotlb; |
| 504 | MemoryRegionSection *section; |
| 505 | MemoryRegion *mr; |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 506 | |
| 507 | for (;;) { |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 508 | AddressSpaceDispatch *d = atomic_rcu_read(&as->dispatch); |
| 509 | section = address_space_translate_internal(d, addr, &addr, plen, true); |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 510 | mr = section->mr; |
| 511 | |
| 512 | if (!mr->iommu_ops) { |
| 513 | break; |
| 514 | } |
| 515 | |
Le Tan | 8d7b8cb | 2014-08-16 13:55:37 +0800 | [diff] [blame] | 516 | iotlb = mr->iommu_ops->translate(mr, addr, is_write); |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 517 | addr = ((iotlb.translated_addr & ~iotlb.addr_mask) |
| 518 | | (addr & iotlb.addr_mask)); |
Peter Crosthwaite | 23820db | 2015-03-16 22:35:54 -0700 | [diff] [blame] | 519 | *plen = MIN(*plen, (addr | iotlb.addr_mask) - addr + 1); |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 520 | if (!(iotlb.perm & (1 << is_write))) { |
| 521 | mr = &io_mem_unassigned; |
| 522 | break; |
| 523 | } |
| 524 | |
| 525 | as = iotlb.target_as; |
| 526 | } |
| 527 | |
Alexey Kardashevskiy | fe680d0 | 2014-05-07 13:40:39 +0000 | [diff] [blame] | 528 | if (xen_enabled() && memory_access_is_direct(mr, is_write)) { |
Paolo Bonzini | a87f395 | 2014-02-07 15:47:46 +0100 | [diff] [blame] | 529 | hwaddr page = ((addr & TARGET_PAGE_MASK) + TARGET_PAGE_SIZE) - addr; |
Peter Crosthwaite | 23820db | 2015-03-16 22:35:54 -0700 | [diff] [blame] | 530 | *plen = MIN(page, *plen); |
Paolo Bonzini | a87f395 | 2014-02-07 15:47:46 +0100 | [diff] [blame] | 531 | } |
| 532 | |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 533 | *xlat = addr; |
| 534 | return mr; |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 535 | } |
| 536 | |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 537 | /* Called from RCU critical section */ |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 538 | MemoryRegionSection * |
Peter Maydell | d7898cd | 2016-01-21 14:15:05 +0000 | [diff] [blame] | 539 | address_space_translate_for_iotlb(CPUState *cpu, int asidx, hwaddr addr, |
Paolo Bonzini | 9d82b5a | 2013-08-16 08:26:30 +0200 | [diff] [blame] | 540 | hwaddr *xlat, hwaddr *plen) |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 541 | { |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 542 | MemoryRegionSection *section; |
Alex Bennée | f35e44e | 2016-10-21 16:34:18 +0100 | [diff] [blame] | 543 | AddressSpaceDispatch *d = atomic_rcu_read(&cpu->cpu_ases[asidx].memory_dispatch); |
Peter Maydell | d7898cd | 2016-01-21 14:15:05 +0000 | [diff] [blame] | 544 | |
| 545 | section = address_space_translate_internal(d, addr, xlat, plen, false); |
Avi Kivity | 3095115 | 2012-10-30 13:47:46 +0200 | [diff] [blame] | 546 | |
| 547 | assert(!section->mr->iommu_ops); |
| 548 | return section; |
Jan Kiszka | 90260c6 | 2013-05-26 21:46:51 +0200 | [diff] [blame] | 549 | } |
bellard | 9fa3e85 | 2004-01-04 18:06:42 +0000 | [diff] [blame] | 550 | #endif |
bellard | fd6ce8f | 2003-05-14 19:00:11 +0000 | [diff] [blame] | 551 | |
Andreas Färber | b170fce | 2013-01-20 20:23:22 +0100 | [diff] [blame] | 552 | #if !defined(CONFIG_USER_ONLY) |
pbrook | 9656f32 | 2008-07-01 20:01:19 +0000 | [diff] [blame] | 553 | |
Juan Quintela | e59fb37 | 2009-09-29 22:48:21 +0200 | [diff] [blame] | 554 | static int cpu_common_post_load(void *opaque, int version_id) |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 555 | { |
Andreas Färber | 259186a | 2013-01-17 18:51:17 +0100 | [diff] [blame] | 556 | CPUState *cpu = opaque; |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 557 | |
aurel32 | 3098dba | 2009-03-07 21:28:24 +0000 | [diff] [blame] | 558 | /* 0x01 was CPU_INTERRUPT_EXIT. This line can be removed when the |
| 559 | version_id is increased. */ |
Andreas Färber | 259186a | 2013-01-17 18:51:17 +0100 | [diff] [blame] | 560 | cpu->interrupt_request &= ~0x01; |
Alex Bennée | d10eb08 | 2016-11-14 14:17:28 +0000 | [diff] [blame] | 561 | tlb_flush(cpu); |
pbrook | 9656f32 | 2008-07-01 20:01:19 +0000 | [diff] [blame] | 562 | |
| 563 | return 0; |
| 564 | } |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 565 | |
Pavel Dovgaluk | 6c3bff0 | 2014-07-31 09:41:17 +0400 | [diff] [blame] | 566 | static int cpu_common_pre_load(void *opaque) |
| 567 | { |
| 568 | CPUState *cpu = opaque; |
| 569 | |
Paolo Bonzini | adee642 | 2014-12-19 12:53:14 +0100 | [diff] [blame] | 570 | cpu->exception_index = -1; |
Pavel Dovgaluk | 6c3bff0 | 2014-07-31 09:41:17 +0400 | [diff] [blame] | 571 | |
| 572 | return 0; |
| 573 | } |
| 574 | |
| 575 | static bool cpu_common_exception_index_needed(void *opaque) |
| 576 | { |
| 577 | CPUState *cpu = opaque; |
| 578 | |
Paolo Bonzini | adee642 | 2014-12-19 12:53:14 +0100 | [diff] [blame] | 579 | return tcg_enabled() && cpu->exception_index != -1; |
Pavel Dovgaluk | 6c3bff0 | 2014-07-31 09:41:17 +0400 | [diff] [blame] | 580 | } |
| 581 | |
| 582 | static const VMStateDescription vmstate_cpu_common_exception_index = { |
| 583 | .name = "cpu_common/exception_index", |
| 584 | .version_id = 1, |
| 585 | .minimum_version_id = 1, |
Juan Quintela | 5cd8cad | 2014-09-23 14:09:54 +0200 | [diff] [blame] | 586 | .needed = cpu_common_exception_index_needed, |
Pavel Dovgaluk | 6c3bff0 | 2014-07-31 09:41:17 +0400 | [diff] [blame] | 587 | .fields = (VMStateField[]) { |
| 588 | VMSTATE_INT32(exception_index, CPUState), |
| 589 | VMSTATE_END_OF_LIST() |
| 590 | } |
| 591 | }; |
| 592 | |
Andrey Smetanin | bac05aa | 2015-07-03 15:01:44 +0300 | [diff] [blame] | 593 | static bool cpu_common_crash_occurred_needed(void *opaque) |
| 594 | { |
| 595 | CPUState *cpu = opaque; |
| 596 | |
| 597 | return cpu->crash_occurred; |
| 598 | } |
| 599 | |
| 600 | static const VMStateDescription vmstate_cpu_common_crash_occurred = { |
| 601 | .name = "cpu_common/crash_occurred", |
| 602 | .version_id = 1, |
| 603 | .minimum_version_id = 1, |
| 604 | .needed = cpu_common_crash_occurred_needed, |
| 605 | .fields = (VMStateField[]) { |
| 606 | VMSTATE_BOOL(crash_occurred, CPUState), |
| 607 | VMSTATE_END_OF_LIST() |
| 608 | } |
| 609 | }; |
| 610 | |
Andreas Färber | 1a1562f | 2013-06-17 04:09:11 +0200 | [diff] [blame] | 611 | const VMStateDescription vmstate_cpu_common = { |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 612 | .name = "cpu_common", |
| 613 | .version_id = 1, |
| 614 | .minimum_version_id = 1, |
Pavel Dovgaluk | 6c3bff0 | 2014-07-31 09:41:17 +0400 | [diff] [blame] | 615 | .pre_load = cpu_common_pre_load, |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 616 | .post_load = cpu_common_post_load, |
Juan Quintela | 35d0845 | 2014-04-16 16:01:33 +0200 | [diff] [blame] | 617 | .fields = (VMStateField[]) { |
Andreas Färber | 259186a | 2013-01-17 18:51:17 +0100 | [diff] [blame] | 618 | VMSTATE_UINT32(halted, CPUState), |
| 619 | VMSTATE_UINT32(interrupt_request, CPUState), |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 620 | VMSTATE_END_OF_LIST() |
Pavel Dovgaluk | 6c3bff0 | 2014-07-31 09:41:17 +0400 | [diff] [blame] | 621 | }, |
Juan Quintela | 5cd8cad | 2014-09-23 14:09:54 +0200 | [diff] [blame] | 622 | .subsections = (const VMStateDescription*[]) { |
| 623 | &vmstate_cpu_common_exception_index, |
Andrey Smetanin | bac05aa | 2015-07-03 15:01:44 +0300 | [diff] [blame] | 624 | &vmstate_cpu_common_crash_occurred, |
Juan Quintela | 5cd8cad | 2014-09-23 14:09:54 +0200 | [diff] [blame] | 625 | NULL |
Juan Quintela | e7f4eff | 2009-09-10 03:04:33 +0200 | [diff] [blame] | 626 | } |
| 627 | }; |
Andreas Färber | 1a1562f | 2013-06-17 04:09:11 +0200 | [diff] [blame] | 628 | |
pbrook | 9656f32 | 2008-07-01 20:01:19 +0000 | [diff] [blame] | 629 | #endif |
| 630 | |
Andreas Färber | 38d8f5c | 2012-12-17 19:47:15 +0100 | [diff] [blame] | 631 | CPUState *qemu_get_cpu(int index) |
Glauber Costa | 950f147 | 2009-06-09 12:15:18 -0400 | [diff] [blame] | 632 | { |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 633 | CPUState *cpu; |
Glauber Costa | 950f147 | 2009-06-09 12:15:18 -0400 | [diff] [blame] | 634 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 635 | CPU_FOREACH(cpu) { |
Andreas Färber | 55e5c28 | 2012-12-17 06:18:02 +0100 | [diff] [blame] | 636 | if (cpu->cpu_index == index) { |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 637 | return cpu; |
Andreas Färber | 55e5c28 | 2012-12-17 06:18:02 +0100 | [diff] [blame] | 638 | } |
Glauber Costa | 950f147 | 2009-06-09 12:15:18 -0400 | [diff] [blame] | 639 | } |
| 640 | |
Andreas Färber | bdc4464 | 2013-06-24 23:50:24 +0200 | [diff] [blame] | 641 | return NULL; |
Glauber Costa | 950f147 | 2009-06-09 12:15:18 -0400 | [diff] [blame] | 642 | } |
| 643 | |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 644 | #if !defined(CONFIG_USER_ONLY) |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 645 | void cpu_address_space_init(CPUState *cpu, AddressSpace *as, int asidx) |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 646 | { |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 647 | CPUAddressSpace *newas; |
| 648 | |
| 649 | /* Target code should have set num_ases before calling us */ |
| 650 | assert(asidx < cpu->num_ases); |
| 651 | |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 652 | if (asidx == 0) { |
| 653 | /* address space 0 gets the convenience alias */ |
| 654 | cpu->as = as; |
| 655 | } |
| 656 | |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 657 | /* KVM cannot currently support multiple address spaces. */ |
| 658 | assert(asidx == 0 || !kvm_enabled()); |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 659 | |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 660 | if (!cpu->cpu_ases) { |
| 661 | cpu->cpu_ases = g_new0(CPUAddressSpace, cpu->num_ases); |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 662 | } |
Peter Maydell | 32857f4 | 2015-10-01 15:29:50 +0100 | [diff] [blame] | 663 | |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 664 | newas = &cpu->cpu_ases[asidx]; |
| 665 | newas->cpu = cpu; |
| 666 | newas->as = as; |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 667 | if (tcg_enabled()) { |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 668 | newas->tcg_as_listener.commit = tcg_commit; |
| 669 | memory_listener_register(&newas->tcg_as_listener, as); |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 670 | } |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 671 | } |
Peter Maydell | 651a5bc | 2016-01-21 14:15:05 +0000 | [diff] [blame] | 672 | |
| 673 | AddressSpace *cpu_get_address_space(CPUState *cpu, int asidx) |
| 674 | { |
| 675 | /* Return the AddressSpace corresponding to the specified index */ |
| 676 | return cpu->cpu_ases[asidx].as; |
| 677 | } |
Edgar E. Iglesias | 09daed8 | 2013-12-17 13:06:51 +1000 | [diff] [blame] | 678 | #endif |
| 679 | |
Laurent Vivier | 7bbc124 | 2016-10-20 13:26:04 +0200 | [diff] [blame] | 680 | void cpu_exec_unrealizefn(CPUState *cpu) |
Bharata B Rao | 1c59eb3 | 2016-05-12 09:18:11 +0530 | [diff] [blame] | 681 | { |
Bharata B Rao | 9dfeca7 | 2016-05-12 09:18:12 +0530 | [diff] [blame] | 682 | CPUClass *cc = CPU_GET_CLASS(cpu); |
| 683 | |
Paolo Bonzini | 267f685 | 2016-08-28 03:45:14 +0200 | [diff] [blame] | 684 | cpu_list_remove(cpu); |
Bharata B Rao | 9dfeca7 | 2016-05-12 09:18:12 +0530 | [diff] [blame] | 685 | |
| 686 | if (cc->vmsd != NULL) { |
| 687 | vmstate_unregister(NULL, cc->vmsd, cpu); |
| 688 | } |
| 689 | if (qdev_get_vmsd(DEVICE(cpu)) == NULL) { |
| 690 | vmstate_unregister(NULL, &vmstate_cpu_common, cpu); |
| 691 | } |
Bharata B Rao | 1c59eb3 | 2016-05-12 09:18:11 +0530 | [diff] [blame] | 692 | } |
| 693 | |
Laurent Vivier | 39e329e | 2016-10-20 13:26:02 +0200 | [diff] [blame] | 694 | void cpu_exec_initfn(CPUState *cpu) |
bellard | fd6ce8f | 2003-05-14 19:00:11 +0000 | [diff] [blame] | 695 | { |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 696 | cpu->as = NULL; |
Peter Maydell | 12ebc9a | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 697 | cpu->num_ases = 0; |
Peter Maydell | 56943e8 | 2016-01-21 14:15:04 +0000 | [diff] [blame] | 698 | |
Eduardo Habkost | 291135b | 2015-04-27 17:00:33 -0300 | [diff] [blame] | 699 | #ifndef CONFIG_USER_ONLY |
Eduardo Habkost | 291135b | 2015-04-27 17:00:33 -0300 | [diff] [blame] | 700 | cpu->thread_id = qemu_get_thread_id(); |
Peter Crosthwaite | 6731d86 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 701 | |
| 702 | /* This is a softmmu CPU object, so create a property for it |
| 703 | * so users can wire up its memory. (This can't go in qom/cpu.c |
| 704 | * because that file is compiled only once for both user-mode |
| 705 | * and system builds.) The default if no link is set up is to use |
| 706 | * the system address space. |
| 707 | */ |
| 708 | object_property_add_link(OBJECT(cpu), "memory", TYPE_MEMORY_REGION, |
| 709 | (Object **)&cpu->memory, |
| 710 | qdev_prop_allow_set_link_before_realize, |
| 711 | OBJ_PROP_LINK_UNREF_ON_RELEASE, |
| 712 | &error_abort); |
| 713 | cpu->memory = system_memory; |
| 714 | object_ref(OBJECT(cpu->memory)); |
Eduardo Habkost | 291135b | 2015-04-27 17:00:33 -0300 | [diff] [blame] | 715 | #endif |
Laurent Vivier | 39e329e | 2016-10-20 13:26:02 +0200 | [diff] [blame] | 716 | } |
| 717 | |
Laurent Vivier | ce5b1bb | 2016-10-20 13:26:03 +0200 | [diff] [blame] | 718 | void cpu_exec_realizefn(CPUState *cpu, Error **errp) |
Laurent Vivier | 39e329e | 2016-10-20 13:26:02 +0200 | [diff] [blame] | 719 | { |
| 720 | CPUClass *cc ATTRIBUTE_UNUSED = CPU_GET_CLASS(cpu); |
Eduardo Habkost | 291135b | 2015-04-27 17:00:33 -0300 | [diff] [blame] | 721 | |
Paolo Bonzini | 267f685 | 2016-08-28 03:45:14 +0200 | [diff] [blame] | 722 | cpu_list_add(cpu); |
Igor Mammedov | 1bc7e52 | 2016-07-25 11:59:19 +0200 | [diff] [blame] | 723 | |
| 724 | #ifndef CONFIG_USER_ONLY |
Andreas Färber | e0d4794 | 2013-07-29 04:07:50 +0200 | [diff] [blame] | 725 | if (qdev_get_vmsd(DEVICE(cpu)) == NULL) { |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 726 | vmstate_register(NULL, cpu->cpu_index, &vmstate_cpu_common, cpu); |
Andreas Färber | e0d4794 | 2013-07-29 04:07:50 +0200 | [diff] [blame] | 727 | } |
Andreas Färber | b170fce | 2013-01-20 20:23:22 +0100 | [diff] [blame] | 728 | if (cc->vmsd != NULL) { |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 729 | vmstate_register(NULL, cpu->cpu_index, cc->vmsd, cpu); |
Andreas Färber | b170fce | 2013-01-20 20:23:22 +0100 | [diff] [blame] | 730 | } |
Paolo Bonzini | 741da0d | 2014-06-27 08:40:04 +0200 | [diff] [blame] | 731 | #endif |
bellard | fd6ce8f | 2003-05-14 19:00:11 +0000 | [diff] [blame] | 732 | } |
| 733 | |
Andreas Färber | 00b941e | 2013-06-29 18:55:54 +0200 | [diff] [blame] | 734 | static void breakpoint_invalidate(CPUState *cpu, target_ulong pc) |
Paul Brook | 94df27f | 2010-02-28 23:47:45 +0000 | [diff] [blame] | 735 | { |
Peter Maydell | a9353fe | 2016-12-06 18:07:09 +0000 | [diff] [blame] | 736 | /* Flush the whole TB as this will not have race conditions |
| 737 | * even if we don't have proper locking yet. |
| 738 | * Ideally we would just invalidate the TBs for the |
| 739 | * specified PC. |
| 740 | */ |
| 741 | tb_flush(cpu); |
Paul Brook | 94df27f | 2010-02-28 23:47:45 +0000 | [diff] [blame] | 742 | } |
bellard | d720b93 | 2004-04-25 17:57:43 +0000 | [diff] [blame] | 743 | |
Paul Brook | c527ee8 | 2010-03-01 03:31:14 +0000 | [diff] [blame] | 744 | #if defined(CONFIG_USER_ONLY) |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 745 | void cpu_watchpoint_remove_all(CPUState *cpu, int mask) |
Paul Brook | c527ee8 | 2010-03-01 03:31:14 +0000 | [diff] [blame] | 746 | |
| 747 | { |
| 748 | } |
| 749 | |
Peter Maydell | 3ee887e | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 750 | int cpu_watchpoint_remove(CPUState *cpu, vaddr addr, vaddr len, |
| 751 | int flags) |
| 752 | { |
| 753 | return -ENOSYS; |
| 754 | } |
| 755 | |
| 756 | void cpu_watchpoint_remove_by_ref(CPUState *cpu, CPUWatchpoint *watchpoint) |
| 757 | { |
| 758 | } |
| 759 | |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 760 | int cpu_watchpoint_insert(CPUState *cpu, vaddr addr, vaddr len, |
Paul Brook | c527ee8 | 2010-03-01 03:31:14 +0000 | [diff] [blame] | 761 | int flags, CPUWatchpoint **watchpoint) |
| 762 | { |
| 763 | return -ENOSYS; |
| 764 | } |
| 765 | #else |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 766 | /* Add a watchpoint. */ |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 767 | int cpu_watchpoint_insert(CPUState *cpu, vaddr addr, vaddr len, |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 768 | int flags, CPUWatchpoint **watchpoint) |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 769 | { |
aliguori | c0ce998 | 2008-11-25 22:13:57 +0000 | [diff] [blame] | 770 | CPUWatchpoint *wp; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 771 | |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 772 | /* forbid ranges which are empty or run off the end of the address space */ |
Max Filippov | 07e2863 | 2014-09-17 22:03:36 -0700 | [diff] [blame] | 773 | if (len == 0 || (addr + len - 1) < addr) { |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 774 | error_report("tried to set invalid watchpoint at %" |
| 775 | VADDR_PRIx ", len=%" VADDR_PRIu, addr, len); |
aliguori | b405133 | 2008-11-18 20:14:20 +0000 | [diff] [blame] | 776 | return -EINVAL; |
| 777 | } |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 778 | wp = g_malloc(sizeof(*wp)); |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 779 | |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 780 | wp->vaddr = addr; |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 781 | wp->len = len; |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 782 | wp->flags = flags; |
| 783 | |
aliguori | 2dc9f41 | 2008-11-18 20:56:59 +0000 | [diff] [blame] | 784 | /* keep all GDB-injected watchpoints in front */ |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 785 | if (flags & BP_GDB) { |
| 786 | QTAILQ_INSERT_HEAD(&cpu->watchpoints, wp, entry); |
| 787 | } else { |
| 788 | QTAILQ_INSERT_TAIL(&cpu->watchpoints, wp, entry); |
| 789 | } |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 790 | |
Andreas Färber | 31b030d | 2013-09-04 01:29:02 +0200 | [diff] [blame] | 791 | tlb_flush_page(cpu, addr); |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 792 | |
| 793 | if (watchpoint) |
| 794 | *watchpoint = wp; |
| 795 | return 0; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 796 | } |
| 797 | |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 798 | /* Remove a specific watchpoint. */ |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 799 | int cpu_watchpoint_remove(CPUState *cpu, vaddr addr, vaddr len, |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 800 | int flags) |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 801 | { |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 802 | CPUWatchpoint *wp; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 803 | |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 804 | QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 805 | if (addr == wp->vaddr && len == wp->len |
aliguori | 6e140f2 | 2008-11-18 20:37:55 +0000 | [diff] [blame] | 806 | && flags == (wp->flags & ~BP_WATCHPOINT_HIT)) { |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 807 | cpu_watchpoint_remove_by_ref(cpu, wp); |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 808 | return 0; |
| 809 | } |
| 810 | } |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 811 | return -ENOENT; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 812 | } |
| 813 | |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 814 | /* Remove a specific watchpoint by reference. */ |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 815 | void cpu_watchpoint_remove_by_ref(CPUState *cpu, CPUWatchpoint *watchpoint) |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 816 | { |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 817 | QTAILQ_REMOVE(&cpu->watchpoints, watchpoint, entry); |
edgar_igl | 7d03f82 | 2008-05-17 18:58:29 +0000 | [diff] [blame] | 818 | |
Andreas Färber | 31b030d | 2013-09-04 01:29:02 +0200 | [diff] [blame] | 819 | tlb_flush_page(cpu, watchpoint->vaddr); |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 820 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 821 | g_free(watchpoint); |
edgar_igl | 7d03f82 | 2008-05-17 18:58:29 +0000 | [diff] [blame] | 822 | } |
| 823 | |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 824 | /* Remove all matching watchpoints. */ |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 825 | void cpu_watchpoint_remove_all(CPUState *cpu, int mask) |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 826 | { |
aliguori | c0ce998 | 2008-11-25 22:13:57 +0000 | [diff] [blame] | 827 | CPUWatchpoint *wp, *next; |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 828 | |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 829 | QTAILQ_FOREACH_SAFE(wp, &cpu->watchpoints, entry, next) { |
Andreas Färber | 75a3403 | 2013-09-02 16:57:02 +0200 | [diff] [blame] | 830 | if (wp->flags & mask) { |
| 831 | cpu_watchpoint_remove_by_ref(cpu, wp); |
| 832 | } |
aliguori | c0ce998 | 2008-11-25 22:13:57 +0000 | [diff] [blame] | 833 | } |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 834 | } |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 835 | |
| 836 | /* Return true if this watchpoint address matches the specified |
| 837 | * access (ie the address range covered by the watchpoint overlaps |
| 838 | * partially or completely with the address range covered by the |
| 839 | * access). |
| 840 | */ |
| 841 | static inline bool cpu_watchpoint_address_matches(CPUWatchpoint *wp, |
| 842 | vaddr addr, |
| 843 | vaddr len) |
| 844 | { |
| 845 | /* We know the lengths are non-zero, but a little caution is |
| 846 | * required to avoid errors in the case where the range ends |
| 847 | * exactly at the top of the address space and so addr + len |
| 848 | * wraps round to zero. |
| 849 | */ |
| 850 | vaddr wpend = wp->vaddr + wp->len - 1; |
| 851 | vaddr addrend = addr + len - 1; |
| 852 | |
| 853 | return !(addr > wpend || wp->vaddr > addrend); |
| 854 | } |
| 855 | |
Paul Brook | c527ee8 | 2010-03-01 03:31:14 +0000 | [diff] [blame] | 856 | #endif |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 857 | |
| 858 | /* Add a breakpoint. */ |
Andreas Färber | b3310ab | 2013-09-02 17:26:20 +0200 | [diff] [blame] | 859 | int cpu_breakpoint_insert(CPUState *cpu, vaddr pc, int flags, |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 860 | CPUBreakpoint **breakpoint) |
bellard | 4c3a88a | 2003-07-26 12:06:08 +0000 | [diff] [blame] | 861 | { |
aliguori | c0ce998 | 2008-11-25 22:13:57 +0000 | [diff] [blame] | 862 | CPUBreakpoint *bp; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 863 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 864 | bp = g_malloc(sizeof(*bp)); |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 865 | |
| 866 | bp->pc = pc; |
| 867 | bp->flags = flags; |
| 868 | |
aliguori | 2dc9f41 | 2008-11-18 20:56:59 +0000 | [diff] [blame] | 869 | /* keep all GDB-injected breakpoints in front */ |
Andreas Färber | 00b941e | 2013-06-29 18:55:54 +0200 | [diff] [blame] | 870 | if (flags & BP_GDB) { |
Andreas Färber | f0c3c50 | 2013-08-26 21:22:53 +0200 | [diff] [blame] | 871 | QTAILQ_INSERT_HEAD(&cpu->breakpoints, bp, entry); |
Andreas Färber | 00b941e | 2013-06-29 18:55:54 +0200 | [diff] [blame] | 872 | } else { |
Andreas Färber | f0c3c50 | 2013-08-26 21:22:53 +0200 | [diff] [blame] | 873 | QTAILQ_INSERT_TAIL(&cpu->breakpoints, bp, entry); |
Andreas Färber | 00b941e | 2013-06-29 18:55:54 +0200 | [diff] [blame] | 874 | } |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 875 | |
Andreas Färber | f0c3c50 | 2013-08-26 21:22:53 +0200 | [diff] [blame] | 876 | breakpoint_invalidate(cpu, pc); |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 877 | |
Andreas Färber | 00b941e | 2013-06-29 18:55:54 +0200 | [diff] [blame] | 878 | if (breakpoint) { |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 879 | *breakpoint = bp; |
Andreas Färber | 00b941e | 2013-06-29 18:55:54 +0200 | [diff] [blame] | 880 | } |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 881 | return 0; |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 882 | } |
| 883 | |
| 884 | /* Remove a specific breakpoint. */ |
Andreas Färber | b3310ab | 2013-09-02 17:26:20 +0200 | [diff] [blame] | 885 | int cpu_breakpoint_remove(CPUState *cpu, vaddr pc, int flags) |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 886 | { |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 887 | CPUBreakpoint *bp; |
| 888 | |
Andreas Färber | f0c3c50 | 2013-08-26 21:22:53 +0200 | [diff] [blame] | 889 | QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) { |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 890 | if (bp->pc == pc && bp->flags == flags) { |
Andreas Färber | b3310ab | 2013-09-02 17:26:20 +0200 | [diff] [blame] | 891 | cpu_breakpoint_remove_by_ref(cpu, bp); |
bellard | 4c3a88a | 2003-07-26 12:06:08 +0000 | [diff] [blame] | 892 | return 0; |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 893 | } |
bellard | 4c3a88a | 2003-07-26 12:06:08 +0000 | [diff] [blame] | 894 | } |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 895 | return -ENOENT; |
bellard | 4c3a88a | 2003-07-26 12:06:08 +0000 | [diff] [blame] | 896 | } |
| 897 | |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 898 | /* Remove a specific breakpoint by reference. */ |
Andreas Färber | b3310ab | 2013-09-02 17:26:20 +0200 | [diff] [blame] | 899 | void cpu_breakpoint_remove_by_ref(CPUState *cpu, CPUBreakpoint *breakpoint) |
bellard | 4c3a88a | 2003-07-26 12:06:08 +0000 | [diff] [blame] | 900 | { |
Andreas Färber | f0c3c50 | 2013-08-26 21:22:53 +0200 | [diff] [blame] | 901 | QTAILQ_REMOVE(&cpu->breakpoints, breakpoint, entry); |
| 902 | |
| 903 | breakpoint_invalidate(cpu, breakpoint->pc); |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 904 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 905 | g_free(breakpoint); |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 906 | } |
| 907 | |
| 908 | /* Remove all matching breakpoints. */ |
Andreas Färber | b3310ab | 2013-09-02 17:26:20 +0200 | [diff] [blame] | 909 | void cpu_breakpoint_remove_all(CPUState *cpu, int mask) |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 910 | { |
aliguori | c0ce998 | 2008-11-25 22:13:57 +0000 | [diff] [blame] | 911 | CPUBreakpoint *bp, *next; |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 912 | |
Andreas Färber | f0c3c50 | 2013-08-26 21:22:53 +0200 | [diff] [blame] | 913 | QTAILQ_FOREACH_SAFE(bp, &cpu->breakpoints, entry, next) { |
Andreas Färber | b3310ab | 2013-09-02 17:26:20 +0200 | [diff] [blame] | 914 | if (bp->flags & mask) { |
| 915 | cpu_breakpoint_remove_by_ref(cpu, bp); |
| 916 | } |
aliguori | c0ce998 | 2008-11-25 22:13:57 +0000 | [diff] [blame] | 917 | } |
bellard | 4c3a88a | 2003-07-26 12:06:08 +0000 | [diff] [blame] | 918 | } |
| 919 | |
bellard | c33a346 | 2003-07-29 20:50:33 +0000 | [diff] [blame] | 920 | /* enable or disable single step mode. EXCP_DEBUG is returned by the |
| 921 | CPU loop after each instruction */ |
Andreas Färber | 3825b28 | 2013-06-24 18:41:06 +0200 | [diff] [blame] | 922 | void cpu_single_step(CPUState *cpu, int enabled) |
bellard | c33a346 | 2003-07-29 20:50:33 +0000 | [diff] [blame] | 923 | { |
Andreas Färber | ed2803d | 2013-06-21 20:20:45 +0200 | [diff] [blame] | 924 | if (cpu->singlestep_enabled != enabled) { |
| 925 | cpu->singlestep_enabled = enabled; |
| 926 | if (kvm_enabled()) { |
Stefan Weil | 38e478e | 2013-07-25 20:50:21 +0200 | [diff] [blame] | 927 | kvm_update_guest_debug(cpu, 0); |
Andreas Färber | ed2803d | 2013-06-21 20:20:45 +0200 | [diff] [blame] | 928 | } else { |
Stuart Brady | ccbb4d4 | 2009-05-03 12:15:06 +0100 | [diff] [blame] | 929 | /* must flush all the translated code to avoid inconsistencies */ |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 930 | /* XXX: only flush what is necessary */ |
Peter Crosthwaite | bbd77c1 | 2015-06-23 19:31:15 -0700 | [diff] [blame] | 931 | tb_flush(cpu); |
aliguori | e22a25c | 2009-03-12 20:12:48 +0000 | [diff] [blame] | 932 | } |
bellard | c33a346 | 2003-07-29 20:50:33 +0000 | [diff] [blame] | 933 | } |
bellard | c33a346 | 2003-07-29 20:50:33 +0000 | [diff] [blame] | 934 | } |
| 935 | |
Andreas Färber | a47dddd | 2013-09-03 17:38:47 +0200 | [diff] [blame] | 936 | void cpu_abort(CPUState *cpu, const char *fmt, ...) |
bellard | 7501267 | 2003-06-21 13:11:07 +0000 | [diff] [blame] | 937 | { |
| 938 | va_list ap; |
pbrook | 493ae1f | 2007-11-23 16:53:59 +0000 | [diff] [blame] | 939 | va_list ap2; |
bellard | 7501267 | 2003-06-21 13:11:07 +0000 | [diff] [blame] | 940 | |
| 941 | va_start(ap, fmt); |
pbrook | 493ae1f | 2007-11-23 16:53:59 +0000 | [diff] [blame] | 942 | va_copy(ap2, ap); |
bellard | 7501267 | 2003-06-21 13:11:07 +0000 | [diff] [blame] | 943 | fprintf(stderr, "qemu: fatal: "); |
| 944 | vfprintf(stderr, fmt, ap); |
| 945 | fprintf(stderr, "\n"); |
Andreas Färber | 878096e | 2013-05-27 01:33:50 +0200 | [diff] [blame] | 946 | cpu_dump_state(cpu, stderr, fprintf, CPU_DUMP_FPU | CPU_DUMP_CCOP); |
Paolo Bonzini | 013a294 | 2015-11-13 13:16:27 +0100 | [diff] [blame] | 947 | if (qemu_log_separate()) { |
Richard Henderson | 1ee7321 | 2016-09-22 15:17:10 -0700 | [diff] [blame] | 948 | qemu_log_lock(); |
aliguori | 93fcfe3 | 2009-01-15 22:34:14 +0000 | [diff] [blame] | 949 | qemu_log("qemu: fatal: "); |
| 950 | qemu_log_vprintf(fmt, ap2); |
| 951 | qemu_log("\n"); |
Andreas Färber | a076285 | 2013-06-16 07:28:50 +0200 | [diff] [blame] | 952 | log_cpu_state(cpu, CPU_DUMP_FPU | CPU_DUMP_CCOP); |
aliguori | 31b1a7b | 2009-01-15 22:35:09 +0000 | [diff] [blame] | 953 | qemu_log_flush(); |
Richard Henderson | 1ee7321 | 2016-09-22 15:17:10 -0700 | [diff] [blame] | 954 | qemu_log_unlock(); |
aliguori | 93fcfe3 | 2009-01-15 22:34:14 +0000 | [diff] [blame] | 955 | qemu_log_close(); |
balrog | 924edca | 2007-06-10 14:07:13 +0000 | [diff] [blame] | 956 | } |
pbrook | 493ae1f | 2007-11-23 16:53:59 +0000 | [diff] [blame] | 957 | va_end(ap2); |
j_mayer | f937329 | 2007-09-29 12:18:20 +0000 | [diff] [blame] | 958 | va_end(ap); |
Pavel Dovgalyuk | 7615936 | 2015-09-17 19:25:07 +0300 | [diff] [blame] | 959 | replay_finish(); |
Riku Voipio | fd052bf | 2010-01-25 14:30:49 +0200 | [diff] [blame] | 960 | #if defined(CONFIG_USER_ONLY) |
| 961 | { |
| 962 | struct sigaction act; |
| 963 | sigfillset(&act.sa_mask); |
| 964 | act.sa_handler = SIG_DFL; |
| 965 | sigaction(SIGABRT, &act, NULL); |
| 966 | } |
| 967 | #endif |
bellard | 7501267 | 2003-06-21 13:11:07 +0000 | [diff] [blame] | 968 | abort(); |
| 969 | } |
| 970 | |
bellard | 0124311 | 2004-01-04 15:48:17 +0000 | [diff] [blame] | 971 | #if !defined(CONFIG_USER_ONLY) |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 972 | /* Called from RCU critical section */ |
Paolo Bonzini | 041603f | 2013-09-09 17:49:45 +0200 | [diff] [blame] | 973 | static RAMBlock *qemu_get_ram_block(ram_addr_t addr) |
| 974 | { |
| 975 | RAMBlock *block; |
| 976 | |
Paolo Bonzini | 4377153 | 2013-09-09 17:58:40 +0200 | [diff] [blame] | 977 | block = atomic_rcu_read(&ram_list.mru_block); |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 978 | if (block && addr - block->offset < block->max_length) { |
Paolo Bonzini | 68851b9 | 2015-10-22 13:51:30 +0200 | [diff] [blame] | 979 | return block; |
Paolo Bonzini | 041603f | 2013-09-09 17:49:45 +0200 | [diff] [blame] | 980 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 981 | QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 982 | if (addr - block->offset < block->max_length) { |
Paolo Bonzini | 041603f | 2013-09-09 17:49:45 +0200 | [diff] [blame] | 983 | goto found; |
| 984 | } |
| 985 | } |
| 986 | |
| 987 | fprintf(stderr, "Bad ram offset %" PRIx64 "\n", (uint64_t)addr); |
| 988 | abort(); |
| 989 | |
| 990 | found: |
Paolo Bonzini | 4377153 | 2013-09-09 17:58:40 +0200 | [diff] [blame] | 991 | /* It is safe to write mru_block outside the iothread lock. This |
| 992 | * is what happens: |
| 993 | * |
| 994 | * mru_block = xxx |
| 995 | * rcu_read_unlock() |
| 996 | * xxx removed from list |
| 997 | * rcu_read_lock() |
| 998 | * read mru_block |
| 999 | * mru_block = NULL; |
| 1000 | * call_rcu(reclaim_ramblock, xxx); |
| 1001 | * rcu_read_unlock() |
| 1002 | * |
| 1003 | * atomic_rcu_set is not needed here. The block was already published |
| 1004 | * when it was placed into the list. Here we're just making an extra |
| 1005 | * copy of the pointer. |
| 1006 | */ |
Paolo Bonzini | 041603f | 2013-09-09 17:49:45 +0200 | [diff] [blame] | 1007 | ram_list.mru_block = block; |
| 1008 | return block; |
| 1009 | } |
| 1010 | |
Juan Quintela | a2f4d5b | 2013-10-10 11:49:53 +0200 | [diff] [blame] | 1011 | static void tlb_reset_dirty_range_all(ram_addr_t start, ram_addr_t length) |
bellard | 1ccde1c | 2004-02-06 19:46:14 +0000 | [diff] [blame] | 1012 | { |
Peter Crosthwaite | 9a13565 | 2015-09-10 22:39:41 -0700 | [diff] [blame] | 1013 | CPUState *cpu; |
Paolo Bonzini | 041603f | 2013-09-09 17:49:45 +0200 | [diff] [blame] | 1014 | ram_addr_t start1; |
Juan Quintela | a2f4d5b | 2013-10-10 11:49:53 +0200 | [diff] [blame] | 1015 | RAMBlock *block; |
| 1016 | ram_addr_t end; |
| 1017 | |
| 1018 | end = TARGET_PAGE_ALIGN(start + length); |
| 1019 | start &= TARGET_PAGE_MASK; |
bellard | f23db16 | 2005-08-21 19:12:28 +0000 | [diff] [blame] | 1020 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1021 | rcu_read_lock(); |
Paolo Bonzini | 041603f | 2013-09-09 17:49:45 +0200 | [diff] [blame] | 1022 | block = qemu_get_ram_block(start); |
| 1023 | assert(block == qemu_get_ram_block(end - 1)); |
Michael S. Tsirkin | 1240be2 | 2014-11-12 11:44:41 +0200 | [diff] [blame] | 1024 | start1 = (uintptr_t)ramblock_ptr(block, start - block->offset); |
Peter Crosthwaite | 9a13565 | 2015-09-10 22:39:41 -0700 | [diff] [blame] | 1025 | CPU_FOREACH(cpu) { |
| 1026 | tlb_reset_dirty(cpu, start1, length); |
| 1027 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1028 | rcu_read_unlock(); |
Juan Quintela | d24981d | 2012-05-22 00:42:40 +0200 | [diff] [blame] | 1029 | } |
| 1030 | |
| 1031 | /* Note: start and end must be within the same ram block. */ |
Stefan Hajnoczi | 03eebc9 | 2014-12-02 11:23:18 +0000 | [diff] [blame] | 1032 | bool cpu_physical_memory_test_and_clear_dirty(ram_addr_t start, |
| 1033 | ram_addr_t length, |
| 1034 | unsigned client) |
Juan Quintela | d24981d | 2012-05-22 00:42:40 +0200 | [diff] [blame] | 1035 | { |
Stefan Hajnoczi | 5b82b70 | 2016-01-25 13:33:20 +0000 | [diff] [blame] | 1036 | DirtyMemoryBlocks *blocks; |
Stefan Hajnoczi | 03eebc9 | 2014-12-02 11:23:18 +0000 | [diff] [blame] | 1037 | unsigned long end, page; |
Stefan Hajnoczi | 5b82b70 | 2016-01-25 13:33:20 +0000 | [diff] [blame] | 1038 | bool dirty = false; |
Juan Quintela | d24981d | 2012-05-22 00:42:40 +0200 | [diff] [blame] | 1039 | |
Stefan Hajnoczi | 03eebc9 | 2014-12-02 11:23:18 +0000 | [diff] [blame] | 1040 | if (length == 0) { |
| 1041 | return false; |
| 1042 | } |
| 1043 | |
| 1044 | end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS; |
| 1045 | page = start >> TARGET_PAGE_BITS; |
Stefan Hajnoczi | 5b82b70 | 2016-01-25 13:33:20 +0000 | [diff] [blame] | 1046 | |
| 1047 | rcu_read_lock(); |
| 1048 | |
| 1049 | blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); |
| 1050 | |
| 1051 | while (page < end) { |
| 1052 | unsigned long idx = page / DIRTY_MEMORY_BLOCK_SIZE; |
| 1053 | unsigned long offset = page % DIRTY_MEMORY_BLOCK_SIZE; |
| 1054 | unsigned long num = MIN(end - page, DIRTY_MEMORY_BLOCK_SIZE - offset); |
| 1055 | |
| 1056 | dirty |= bitmap_test_and_clear_atomic(blocks->blocks[idx], |
| 1057 | offset, num); |
| 1058 | page += num; |
| 1059 | } |
| 1060 | |
| 1061 | rcu_read_unlock(); |
Stefan Hajnoczi | 03eebc9 | 2014-12-02 11:23:18 +0000 | [diff] [blame] | 1062 | |
| 1063 | if (dirty && tcg_enabled()) { |
Juan Quintela | a2f4d5b | 2013-10-10 11:49:53 +0200 | [diff] [blame] | 1064 | tlb_reset_dirty_range_all(start, length); |
Juan Quintela | d24981d | 2012-05-22 00:42:40 +0200 | [diff] [blame] | 1065 | } |
Stefan Hajnoczi | 03eebc9 | 2014-12-02 11:23:18 +0000 | [diff] [blame] | 1066 | |
| 1067 | return dirty; |
bellard | 1ccde1c | 2004-02-06 19:46:14 +0000 | [diff] [blame] | 1068 | } |
| 1069 | |
Gerd Hoffmann | 8deaf12 | 2017-04-21 11:16:25 +0200 | [diff] [blame] | 1070 | DirtyBitmapSnapshot *cpu_physical_memory_snapshot_and_clear_dirty |
| 1071 | (ram_addr_t start, ram_addr_t length, unsigned client) |
| 1072 | { |
| 1073 | DirtyMemoryBlocks *blocks; |
| 1074 | unsigned long align = 1UL << (TARGET_PAGE_BITS + BITS_PER_LEVEL); |
| 1075 | ram_addr_t first = QEMU_ALIGN_DOWN(start, align); |
| 1076 | ram_addr_t last = QEMU_ALIGN_UP(start + length, align); |
| 1077 | DirtyBitmapSnapshot *snap; |
| 1078 | unsigned long page, end, dest; |
| 1079 | |
| 1080 | snap = g_malloc0(sizeof(*snap) + |
| 1081 | ((last - first) >> (TARGET_PAGE_BITS + 3))); |
| 1082 | snap->start = first; |
| 1083 | snap->end = last; |
| 1084 | |
| 1085 | page = first >> TARGET_PAGE_BITS; |
| 1086 | end = last >> TARGET_PAGE_BITS; |
| 1087 | dest = 0; |
| 1088 | |
| 1089 | rcu_read_lock(); |
| 1090 | |
| 1091 | blocks = atomic_rcu_read(&ram_list.dirty_memory[client]); |
| 1092 | |
| 1093 | while (page < end) { |
| 1094 | unsigned long idx = page / DIRTY_MEMORY_BLOCK_SIZE; |
| 1095 | unsigned long offset = page % DIRTY_MEMORY_BLOCK_SIZE; |
| 1096 | unsigned long num = MIN(end - page, DIRTY_MEMORY_BLOCK_SIZE - offset); |
| 1097 | |
| 1098 | assert(QEMU_IS_ALIGNED(offset, (1 << BITS_PER_LEVEL))); |
| 1099 | assert(QEMU_IS_ALIGNED(num, (1 << BITS_PER_LEVEL))); |
| 1100 | offset >>= BITS_PER_LEVEL; |
| 1101 | |
| 1102 | bitmap_copy_and_clear_atomic(snap->dirty + dest, |
| 1103 | blocks->blocks[idx] + offset, |
| 1104 | num); |
| 1105 | page += num; |
| 1106 | dest += num >> BITS_PER_LEVEL; |
| 1107 | } |
| 1108 | |
| 1109 | rcu_read_unlock(); |
| 1110 | |
| 1111 | if (tcg_enabled()) { |
| 1112 | tlb_reset_dirty_range_all(start, length); |
| 1113 | } |
| 1114 | |
| 1115 | return snap; |
| 1116 | } |
| 1117 | |
| 1118 | bool cpu_physical_memory_snapshot_get_dirty(DirtyBitmapSnapshot *snap, |
| 1119 | ram_addr_t start, |
| 1120 | ram_addr_t length) |
| 1121 | { |
| 1122 | unsigned long page, end; |
| 1123 | |
| 1124 | assert(start >= snap->start); |
| 1125 | assert(start + length <= snap->end); |
| 1126 | |
| 1127 | end = TARGET_PAGE_ALIGN(start + length - snap->start) >> TARGET_PAGE_BITS; |
| 1128 | page = (start - snap->start) >> TARGET_PAGE_BITS; |
| 1129 | |
| 1130 | while (page < end) { |
| 1131 | if (test_bit(page, snap->dirty)) { |
| 1132 | return true; |
| 1133 | } |
| 1134 | page++; |
| 1135 | } |
| 1136 | return false; |
| 1137 | } |
| 1138 | |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 1139 | /* Called from RCU critical section */ |
Andreas Färber | bb0e627 | 2013-09-03 13:32:01 +0200 | [diff] [blame] | 1140 | hwaddr memory_region_section_get_iotlb(CPUState *cpu, |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 1141 | MemoryRegionSection *section, |
| 1142 | target_ulong vaddr, |
| 1143 | hwaddr paddr, hwaddr xlat, |
| 1144 | int prot, |
| 1145 | target_ulong *address) |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1146 | { |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 1147 | hwaddr iotlb; |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1148 | CPUWatchpoint *wp; |
| 1149 | |
Blue Swirl | cc5bea6 | 2012-04-14 14:56:48 +0000 | [diff] [blame] | 1150 | if (memory_region_is_ram(section->mr)) { |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1151 | /* Normal RAM. */ |
Paolo Bonzini | e4e6979 | 2016-03-01 10:44:50 +0100 | [diff] [blame] | 1152 | iotlb = memory_region_get_ram_addr(section->mr) + xlat; |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1153 | if (!section->readonly) { |
Liu Ping Fan | b41aac4 | 2013-05-29 11:09:17 +0200 | [diff] [blame] | 1154 | iotlb |= PHYS_SECTION_NOTDIRTY; |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1155 | } else { |
Liu Ping Fan | b41aac4 | 2013-05-29 11:09:17 +0200 | [diff] [blame] | 1156 | iotlb |= PHYS_SECTION_ROM; |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1157 | } |
| 1158 | } else { |
Peter Maydell | 0b8e2c1 | 2015-07-20 12:27:16 +0100 | [diff] [blame] | 1159 | AddressSpaceDispatch *d; |
| 1160 | |
| 1161 | d = atomic_rcu_read(§ion->address_space->dispatch); |
| 1162 | iotlb = section - d->map.sections; |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 1163 | iotlb += xlat; |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1164 | } |
| 1165 | |
| 1166 | /* Make accesses to pages with watchpoints go via the |
| 1167 | watchpoint trap routines. */ |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 1168 | QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 1169 | if (cpu_watchpoint_address_matches(wp, vaddr, TARGET_PAGE_SIZE)) { |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1170 | /* Avoid trapping reads of pages with a write breakpoint. */ |
| 1171 | if ((prot & PAGE_WRITE) || (wp->flags & BP_MEM_READ)) { |
Liu Ping Fan | b41aac4 | 2013-05-29 11:09:17 +0200 | [diff] [blame] | 1172 | iotlb = PHYS_SECTION_WATCH + paddr; |
Blue Swirl | e554861 | 2012-04-21 13:08:33 +0000 | [diff] [blame] | 1173 | *address |= TLB_MMIO; |
| 1174 | break; |
| 1175 | } |
| 1176 | } |
| 1177 | } |
| 1178 | |
| 1179 | return iotlb; |
| 1180 | } |
bellard | 9fa3e85 | 2004-01-04 18:06:42 +0000 | [diff] [blame] | 1181 | #endif /* defined(CONFIG_USER_ONLY) */ |
| 1182 | |
pbrook | e2eef17 | 2008-06-08 01:09:01 +0000 | [diff] [blame] | 1183 | #if !defined(CONFIG_USER_ONLY) |
pbrook | 8da3ff1 | 2008-12-01 18:59:50 +0000 | [diff] [blame] | 1184 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 1185 | static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 1186 | uint16_t section); |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 1187 | static subpage_t *subpage_init(AddressSpace *as, hwaddr base); |
Avi Kivity | 54688b1 | 2012-02-09 17:34:32 +0200 | [diff] [blame] | 1188 | |
Igor Mammedov | a2b257d | 2014-10-31 16:38:37 +0000 | [diff] [blame] | 1189 | static void *(*phys_mem_alloc)(size_t size, uint64_t *align) = |
| 1190 | qemu_anon_ram_alloc; |
Markus Armbruster | 9113803 | 2013-07-31 15:11:08 +0200 | [diff] [blame] | 1191 | |
| 1192 | /* |
| 1193 | * Set a custom physical guest memory alloator. |
| 1194 | * Accelerators with unusual needs may need this. Hopefully, we can |
| 1195 | * get rid of it eventually. |
| 1196 | */ |
Igor Mammedov | a2b257d | 2014-10-31 16:38:37 +0000 | [diff] [blame] | 1197 | void phys_mem_set_alloc(void *(*alloc)(size_t, uint64_t *align)) |
Markus Armbruster | 9113803 | 2013-07-31 15:11:08 +0200 | [diff] [blame] | 1198 | { |
| 1199 | phys_mem_alloc = alloc; |
| 1200 | } |
| 1201 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1202 | static uint16_t phys_section_add(PhysPageMap *map, |
| 1203 | MemoryRegionSection *section) |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 1204 | { |
Paolo Bonzini | 68f3f65 | 2013-05-07 11:30:23 +0200 | [diff] [blame] | 1205 | /* The physical section number is ORed with a page-aligned |
| 1206 | * pointer to produce the iotlb entries. Thus it should |
| 1207 | * never overflow into the page-aligned value. |
| 1208 | */ |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1209 | assert(map->sections_nb < TARGET_PAGE_SIZE); |
Paolo Bonzini | 68f3f65 | 2013-05-07 11:30:23 +0200 | [diff] [blame] | 1210 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1211 | if (map->sections_nb == map->sections_nb_alloc) { |
| 1212 | map->sections_nb_alloc = MAX(map->sections_nb_alloc * 2, 16); |
| 1213 | map->sections = g_renew(MemoryRegionSection, map->sections, |
| 1214 | map->sections_nb_alloc); |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 1215 | } |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1216 | map->sections[map->sections_nb] = *section; |
Paolo Bonzini | dfde4e6 | 2013-05-06 10:46:11 +0200 | [diff] [blame] | 1217 | memory_region_ref(section->mr); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1218 | return map->sections_nb++; |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 1219 | } |
| 1220 | |
Paolo Bonzini | 058bc4b | 2013-06-25 09:30:48 +0200 | [diff] [blame] | 1221 | static void phys_section_destroy(MemoryRegion *mr) |
| 1222 | { |
Don Slutz | 55b4e80 | 2015-11-30 17:11:04 -0500 | [diff] [blame] | 1223 | bool have_sub_page = mr->subpage; |
| 1224 | |
Paolo Bonzini | dfde4e6 | 2013-05-06 10:46:11 +0200 | [diff] [blame] | 1225 | memory_region_unref(mr); |
| 1226 | |
Don Slutz | 55b4e80 | 2015-11-30 17:11:04 -0500 | [diff] [blame] | 1227 | if (have_sub_page) { |
Paolo Bonzini | 058bc4b | 2013-06-25 09:30:48 +0200 | [diff] [blame] | 1228 | subpage_t *subpage = container_of(mr, subpage_t, iomem); |
Peter Crosthwaite | b4fefef | 2014-06-05 23:15:52 -0700 | [diff] [blame] | 1229 | object_unref(OBJECT(&subpage->iomem)); |
Paolo Bonzini | 058bc4b | 2013-06-25 09:30:48 +0200 | [diff] [blame] | 1230 | g_free(subpage); |
| 1231 | } |
| 1232 | } |
| 1233 | |
Paolo Bonzini | 6092666 | 2013-05-29 12:30:26 +0200 | [diff] [blame] | 1234 | static void phys_sections_free(PhysPageMap *map) |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 1235 | { |
Paolo Bonzini | 9affd6f | 2013-05-29 12:09:47 +0200 | [diff] [blame] | 1236 | while (map->sections_nb > 0) { |
| 1237 | MemoryRegionSection *section = &map->sections[--map->sections_nb]; |
Paolo Bonzini | 058bc4b | 2013-06-25 09:30:48 +0200 | [diff] [blame] | 1238 | phys_section_destroy(section->mr); |
| 1239 | } |
Paolo Bonzini | 9affd6f | 2013-05-29 12:09:47 +0200 | [diff] [blame] | 1240 | g_free(map->sections); |
| 1241 | g_free(map->nodes); |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 1242 | } |
| 1243 | |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 1244 | static void register_subpage(AddressSpaceDispatch *d, MemoryRegionSection *section) |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1245 | { |
| 1246 | subpage_t *subpage; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 1247 | hwaddr base = section->offset_within_address_space |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1248 | & TARGET_PAGE_MASK; |
Michael S. Tsirkin | 97115a8 | 2013-11-13 20:08:19 +0200 | [diff] [blame] | 1249 | MemoryRegionSection *existing = phys_page_find(d->phys_map, base, |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1250 | d->map.nodes, d->map.sections); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1251 | MemoryRegionSection subsection = { |
| 1252 | .offset_within_address_space = base, |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1253 | .size = int128_make64(TARGET_PAGE_SIZE), |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1254 | }; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 1255 | hwaddr start, end; |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1256 | |
Avi Kivity | f3705d5 | 2012-03-08 16:16:34 +0200 | [diff] [blame] | 1257 | assert(existing->mr->subpage || existing->mr == &io_mem_unassigned); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1258 | |
Avi Kivity | f3705d5 | 2012-03-08 16:16:34 +0200 | [diff] [blame] | 1259 | if (!(existing->mr->subpage)) { |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 1260 | subpage = subpage_init(d->as, base); |
Edgar E. Iglesias | 3be91e8 | 2013-11-07 18:42:51 +0100 | [diff] [blame] | 1261 | subsection.address_space = d->as; |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1262 | subsection.mr = &subpage->iomem; |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 1263 | phys_page_set(d, base >> TARGET_PAGE_BITS, 1, |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1264 | phys_section_add(&d->map, &subsection)); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1265 | } else { |
Avi Kivity | f3705d5 | 2012-03-08 16:16:34 +0200 | [diff] [blame] | 1266 | subpage = container_of(existing->mr, subpage_t, iomem); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1267 | } |
| 1268 | start = section->offset_within_address_space & ~TARGET_PAGE_MASK; |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1269 | end = start + int128_get64(section->size) - 1; |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1270 | subpage_register(subpage, start, end, |
| 1271 | phys_section_add(&d->map, section)); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1272 | } |
| 1273 | |
| 1274 | |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1275 | static void register_multipage(AddressSpaceDispatch *d, |
| 1276 | MemoryRegionSection *section) |
bellard | 33417e7 | 2003-08-10 21:47:01 +0000 | [diff] [blame] | 1277 | { |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 1278 | hwaddr start_addr = section->offset_within_address_space; |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 1279 | uint16_t section_index = phys_section_add(&d->map, section); |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1280 | uint64_t num_pages = int128_get64(int128_rshift(section->size, |
| 1281 | TARGET_PAGE_BITS)); |
Avi Kivity | dd81124 | 2012-01-02 12:17:03 +0200 | [diff] [blame] | 1282 | |
Paolo Bonzini | 733d5ef | 2013-05-27 10:47:10 +0200 | [diff] [blame] | 1283 | assert(num_pages); |
| 1284 | phys_page_set(d, start_addr >> TARGET_PAGE_BITS, num_pages, section_index); |
bellard | 33417e7 | 2003-08-10 21:47:01 +0000 | [diff] [blame] | 1285 | } |
| 1286 | |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 1287 | static void mem_add(MemoryListener *listener, MemoryRegionSection *section) |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1288 | { |
Paolo Bonzini | 89ae337 | 2013-06-02 10:39:07 +0200 | [diff] [blame] | 1289 | AddressSpace *as = container_of(listener, AddressSpace, dispatch_listener); |
Paolo Bonzini | 0075270 | 2013-05-29 12:13:54 +0200 | [diff] [blame] | 1290 | AddressSpaceDispatch *d = as->next_dispatch; |
Paolo Bonzini | 99b9cc0 | 2013-05-27 13:18:01 +0200 | [diff] [blame] | 1291 | MemoryRegionSection now = *section, remain = *section; |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1292 | Int128 page_size = int128_make64(TARGET_PAGE_SIZE); |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1293 | |
Paolo Bonzini | 733d5ef | 2013-05-27 10:47:10 +0200 | [diff] [blame] | 1294 | if (now.offset_within_address_space & ~TARGET_PAGE_MASK) { |
| 1295 | uint64_t left = TARGET_PAGE_ALIGN(now.offset_within_address_space) |
| 1296 | - now.offset_within_address_space; |
| 1297 | |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1298 | now.size = int128_min(int128_make64(left), now.size); |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 1299 | register_subpage(d, &now); |
Paolo Bonzini | 733d5ef | 2013-05-27 10:47:10 +0200 | [diff] [blame] | 1300 | } else { |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1301 | now.size = int128_zero(); |
Paolo Bonzini | 733d5ef | 2013-05-27 10:47:10 +0200 | [diff] [blame] | 1302 | } |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1303 | while (int128_ne(remain.size, now.size)) { |
| 1304 | remain.size = int128_sub(remain.size, now.size); |
| 1305 | remain.offset_within_address_space += int128_get64(now.size); |
| 1306 | remain.offset_within_region += int128_get64(now.size); |
Tyler Hall | 69b6764 | 2012-07-25 18:45:04 -0400 | [diff] [blame] | 1307 | now = remain; |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1308 | if (int128_lt(remain.size, page_size)) { |
Paolo Bonzini | 733d5ef | 2013-05-27 10:47:10 +0200 | [diff] [blame] | 1309 | register_subpage(d, &now); |
Hu Tao | 8826624 | 2013-08-29 18:21:16 +0800 | [diff] [blame] | 1310 | } else if (remain.offset_within_address_space & ~TARGET_PAGE_MASK) { |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1311 | now.size = page_size; |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 1312 | register_subpage(d, &now); |
Tyler Hall | 69b6764 | 2012-07-25 18:45:04 -0400 | [diff] [blame] | 1313 | } else { |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 1314 | now.size = int128_and(now.size, int128_neg(page_size)); |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 1315 | register_multipage(d, &now); |
Tyler Hall | 69b6764 | 2012-07-25 18:45:04 -0400 | [diff] [blame] | 1316 | } |
Avi Kivity | 0f0cb16 | 2012-02-13 17:14:32 +0200 | [diff] [blame] | 1317 | } |
| 1318 | } |
| 1319 | |
Sheng Yang | 62a2744 | 2010-01-26 19:21:16 +0800 | [diff] [blame] | 1320 | void qemu_flush_coalesced_mmio_buffer(void) |
| 1321 | { |
| 1322 | if (kvm_enabled()) |
| 1323 | kvm_flush_coalesced_mmio_buffer(); |
| 1324 | } |
| 1325 | |
Umesh Deshpande | b2a8658 | 2011-08-17 00:01:33 -0700 | [diff] [blame] | 1326 | void qemu_mutex_lock_ramlist(void) |
| 1327 | { |
| 1328 | qemu_mutex_lock(&ram_list.mutex); |
| 1329 | } |
| 1330 | |
| 1331 | void qemu_mutex_unlock_ramlist(void) |
| 1332 | { |
| 1333 | qemu_mutex_unlock(&ram_list.mutex); |
| 1334 | } |
| 1335 | |
Markus Armbruster | e1e84ba | 2013-07-31 15:11:10 +0200 | [diff] [blame] | 1336 | #ifdef __linux__ |
Alexey Kardashevskiy | 9c60766 | 2017-03-02 13:36:11 +1100 | [diff] [blame] | 1337 | /* |
| 1338 | * FIXME TOCTTOU: this iterates over memory backends' mem-path, which |
| 1339 | * may or may not name the same files / on the same filesystem now as |
| 1340 | * when we actually open and map them. Iterate over the file |
| 1341 | * descriptors instead, and use qemu_fd_getpagesize(). |
| 1342 | */ |
| 1343 | static int find_max_supported_pagesize(Object *obj, void *opaque) |
| 1344 | { |
| 1345 | char *mem_path; |
| 1346 | long *hpsize_min = opaque; |
| 1347 | |
| 1348 | if (object_dynamic_cast(obj, TYPE_MEMORY_BACKEND)) { |
| 1349 | mem_path = object_property_get_str(obj, "mem-path", NULL); |
| 1350 | if (mem_path) { |
| 1351 | long hpsize = qemu_mempath_getpagesize(mem_path); |
| 1352 | if (hpsize < *hpsize_min) { |
| 1353 | *hpsize_min = hpsize; |
| 1354 | } |
| 1355 | } else { |
| 1356 | *hpsize_min = getpagesize(); |
| 1357 | } |
| 1358 | } |
| 1359 | |
| 1360 | return 0; |
| 1361 | } |
| 1362 | |
| 1363 | long qemu_getrampagesize(void) |
| 1364 | { |
| 1365 | long hpsize = LONG_MAX; |
| 1366 | long mainrampagesize; |
| 1367 | Object *memdev_root; |
| 1368 | |
| 1369 | if (mem_path) { |
| 1370 | mainrampagesize = qemu_mempath_getpagesize(mem_path); |
| 1371 | } else { |
| 1372 | mainrampagesize = getpagesize(); |
| 1373 | } |
| 1374 | |
| 1375 | /* it's possible we have memory-backend objects with |
| 1376 | * hugepage-backed RAM. these may get mapped into system |
| 1377 | * address space via -numa parameters or memory hotplug |
| 1378 | * hooks. we want to take these into account, but we |
| 1379 | * also want to make sure these supported hugepage |
| 1380 | * sizes are applicable across the entire range of memory |
| 1381 | * we may boot from, so we take the min across all |
| 1382 | * backends, and assume normal pages in cases where a |
| 1383 | * backend isn't backed by hugepages. |
| 1384 | */ |
| 1385 | memdev_root = object_resolve_path("/objects", NULL); |
| 1386 | if (memdev_root) { |
| 1387 | object_child_foreach(memdev_root, find_max_supported_pagesize, &hpsize); |
| 1388 | } |
| 1389 | if (hpsize == LONG_MAX) { |
| 1390 | /* No additional memory regions found ==> Report main RAM page size */ |
| 1391 | return mainrampagesize; |
| 1392 | } |
| 1393 | |
| 1394 | /* If NUMA is disabled or the NUMA nodes are not backed with a |
| 1395 | * memory-backend, then there is at least one node using "normal" RAM, |
| 1396 | * so if its page size is smaller we have got to report that size instead. |
| 1397 | */ |
| 1398 | if (hpsize > mainrampagesize && |
| 1399 | (nb_numa_nodes == 0 || numa_info[0].node_memdev == NULL)) { |
| 1400 | static bool warned; |
| 1401 | if (!warned) { |
| 1402 | error_report("Huge page support disabled (n/a for main memory)."); |
| 1403 | warned = true; |
| 1404 | } |
| 1405 | return mainrampagesize; |
| 1406 | } |
| 1407 | |
| 1408 | return hpsize; |
| 1409 | } |
| 1410 | #else |
| 1411 | long qemu_getrampagesize(void) |
| 1412 | { |
| 1413 | return getpagesize(); |
| 1414 | } |
| 1415 | #endif |
| 1416 | |
| 1417 | #ifdef __linux__ |
Haozhong Zhang | d6af99c | 2016-10-27 12:22:58 +0800 | [diff] [blame] | 1418 | static int64_t get_file_size(int fd) |
| 1419 | { |
| 1420 | int64_t size = lseek(fd, 0, SEEK_END); |
| 1421 | if (size < 0) { |
| 1422 | return -errno; |
| 1423 | } |
| 1424 | return size; |
| 1425 | } |
| 1426 | |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1427 | static void *file_ram_alloc(RAMBlock *block, |
| 1428 | ram_addr_t memory, |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 1429 | const char *path, |
| 1430 | Error **errp) |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1431 | { |
Markus Armbruster | fd97fd4 | 2016-03-07 20:25:13 +0100 | [diff] [blame] | 1432 | bool unlink_on_error = false; |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1433 | char *filename; |
Peter Feiner | 8ca761f | 2013-03-04 13:54:25 -0500 | [diff] [blame] | 1434 | char *sanitized_name; |
| 1435 | char *c; |
Igor Mammedov | 056b68a | 2016-07-20 11:54:03 +0200 | [diff] [blame] | 1436 | void *area = MAP_FAILED; |
Paolo Bonzini | 5c3ece7 | 2016-03-17 15:53:13 +0100 | [diff] [blame] | 1437 | int fd = -1; |
Haozhong Zhang | d6af99c | 2016-10-27 12:22:58 +0800 | [diff] [blame] | 1438 | int64_t file_size; |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1439 | |
Markus Armbruster | fd97fd4 | 2016-03-07 20:25:13 +0100 | [diff] [blame] | 1440 | if (kvm_enabled() && !kvm_has_sync_mmu()) { |
| 1441 | error_setg(errp, |
| 1442 | "host lacks kvm mmu notifiers, -mem-path unsupported"); |
| 1443 | return NULL; |
| 1444 | } |
| 1445 | |
| 1446 | for (;;) { |
| 1447 | fd = open(path, O_RDWR); |
| 1448 | if (fd >= 0) { |
| 1449 | /* @path names an existing file, use it */ |
| 1450 | break; |
| 1451 | } |
| 1452 | if (errno == ENOENT) { |
| 1453 | /* @path names a file that doesn't exist, create it */ |
| 1454 | fd = open(path, O_RDWR | O_CREAT | O_EXCL, 0644); |
| 1455 | if (fd >= 0) { |
| 1456 | unlink_on_error = true; |
| 1457 | break; |
| 1458 | } |
| 1459 | } else if (errno == EISDIR) { |
| 1460 | /* @path names a directory, create a file there */ |
| 1461 | /* Make name safe to use with mkstemp by replacing '/' with '_'. */ |
| 1462 | sanitized_name = g_strdup(memory_region_name(block->mr)); |
| 1463 | for (c = sanitized_name; *c != '\0'; c++) { |
| 1464 | if (*c == '/') { |
| 1465 | *c = '_'; |
| 1466 | } |
| 1467 | } |
| 1468 | |
| 1469 | filename = g_strdup_printf("%s/qemu_back_mem.%s.XXXXXX", path, |
| 1470 | sanitized_name); |
| 1471 | g_free(sanitized_name); |
| 1472 | |
| 1473 | fd = mkstemp(filename); |
| 1474 | if (fd >= 0) { |
| 1475 | unlink(filename); |
| 1476 | g_free(filename); |
| 1477 | break; |
| 1478 | } |
| 1479 | g_free(filename); |
| 1480 | } |
| 1481 | if (errno != EEXIST && errno != EINTR) { |
| 1482 | error_setg_errno(errp, errno, |
| 1483 | "can't open backing store %s for guest RAM", |
| 1484 | path); |
| 1485 | goto error; |
| 1486 | } |
| 1487 | /* |
| 1488 | * Try again on EINTR and EEXIST. The latter happens when |
| 1489 | * something else creates the file between our two open(). |
| 1490 | */ |
| 1491 | } |
| 1492 | |
Dr. David Alan Gilbert | 863e962 | 2016-09-29 20:09:37 +0100 | [diff] [blame] | 1493 | block->page_size = qemu_fd_getpagesize(fd); |
Haozhong Zhang | 8360668 | 2016-10-24 20:49:37 +0800 | [diff] [blame] | 1494 | block->mr->align = block->page_size; |
| 1495 | #if defined(__s390x__) |
| 1496 | if (kvm_enabled()) { |
| 1497 | block->mr->align = MAX(block->mr->align, QEMU_VMALLOC_ALIGN); |
| 1498 | } |
| 1499 | #endif |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1500 | |
Haozhong Zhang | d6af99c | 2016-10-27 12:22:58 +0800 | [diff] [blame] | 1501 | file_size = get_file_size(fd); |
| 1502 | |
Dr. David Alan Gilbert | 863e962 | 2016-09-29 20:09:37 +0100 | [diff] [blame] | 1503 | if (memory < block->page_size) { |
Hu Tao | 557529d | 2014-09-09 13:28:00 +0800 | [diff] [blame] | 1504 | error_setg(errp, "memory size 0x" RAM_ADDR_FMT " must be equal to " |
Dr. David Alan Gilbert | 863e962 | 2016-09-29 20:09:37 +0100 | [diff] [blame] | 1505 | "or larger than page size 0x%zx", |
| 1506 | memory, block->page_size); |
Hu Tao | 557529d | 2014-09-09 13:28:00 +0800 | [diff] [blame] | 1507 | goto error; |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1508 | } |
| 1509 | |
Haozhong Zhang | 1775f11 | 2016-11-02 09:05:51 +0800 | [diff] [blame] | 1510 | if (file_size > 0 && file_size < memory) { |
| 1511 | error_setg(errp, "backing store %s size 0x%" PRIx64 |
| 1512 | " does not match 'size' option 0x" RAM_ADDR_FMT, |
| 1513 | path, file_size, memory); |
| 1514 | goto error; |
| 1515 | } |
| 1516 | |
Dr. David Alan Gilbert | 863e962 | 2016-09-29 20:09:37 +0100 | [diff] [blame] | 1517 | memory = ROUND_UP(memory, block->page_size); |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1518 | |
| 1519 | /* |
| 1520 | * ftruncate is not supported by hugetlbfs in older |
| 1521 | * hosts, so don't bother bailing out on errors. |
| 1522 | * If anything goes wrong with it under other filesystems, |
| 1523 | * mmap will fail. |
Haozhong Zhang | d6af99c | 2016-10-27 12:22:58 +0800 | [diff] [blame] | 1524 | * |
| 1525 | * Do not truncate the non-empty backend file to avoid corrupting |
| 1526 | * the existing data in the file. Disabling shrinking is not |
| 1527 | * enough. For example, the current vNVDIMM implementation stores |
| 1528 | * the guest NVDIMM labels at the end of the backend file. If the |
| 1529 | * backend file is later extended, QEMU will not be able to find |
| 1530 | * those labels. Therefore, extending the non-empty backend file |
| 1531 | * is disabled as well. |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1532 | */ |
Haozhong Zhang | d6af99c | 2016-10-27 12:22:58 +0800 | [diff] [blame] | 1533 | if (!file_size && ftruncate(fd, memory)) { |
Yoshiaki Tamura | 9742bf2 | 2010-08-18 13:30:13 +0900 | [diff] [blame] | 1534 | perror("ftruncate"); |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 1535 | } |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1536 | |
Dominik Dingel | d2f39ad | 2016-04-25 13:55:38 +0200 | [diff] [blame] | 1537 | area = qemu_ram_mmap(fd, memory, block->mr->align, |
| 1538 | block->flags & RAM_SHARED); |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1539 | if (area == MAP_FAILED) { |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 1540 | error_setg_errno(errp, errno, |
Markus Armbruster | fd97fd4 | 2016-03-07 20:25:13 +0100 | [diff] [blame] | 1541 | "unable to map backing store for guest RAM"); |
Marcelo Tosatti | f9a49df | 2014-02-04 13:41:53 -0500 | [diff] [blame] | 1542 | goto error; |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1543 | } |
Marcelo Tosatti | ef36fa1 | 2013-10-28 18:51:46 -0200 | [diff] [blame] | 1544 | |
| 1545 | if (mem_prealloc) { |
Jitendra Kolhe | 1e356fc | 2017-02-24 09:01:43 +0530 | [diff] [blame] | 1546 | os_mem_prealloc(fd, area, memory, smp_cpus, errp); |
Igor Mammedov | 056b68a | 2016-07-20 11:54:03 +0200 | [diff] [blame] | 1547 | if (errp && *errp) { |
| 1548 | goto error; |
| 1549 | } |
Marcelo Tosatti | ef36fa1 | 2013-10-28 18:51:46 -0200 | [diff] [blame] | 1550 | } |
| 1551 | |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1552 | block->fd = fd; |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1553 | return area; |
Marcelo Tosatti | f9a49df | 2014-02-04 13:41:53 -0500 | [diff] [blame] | 1554 | |
| 1555 | error: |
Igor Mammedov | 056b68a | 2016-07-20 11:54:03 +0200 | [diff] [blame] | 1556 | if (area != MAP_FAILED) { |
| 1557 | qemu_ram_munmap(area, memory); |
| 1558 | } |
Markus Armbruster | fd97fd4 | 2016-03-07 20:25:13 +0100 | [diff] [blame] | 1559 | if (unlink_on_error) { |
| 1560 | unlink(path); |
| 1561 | } |
Paolo Bonzini | 5c3ece7 | 2016-03-17 15:53:13 +0100 | [diff] [blame] | 1562 | if (fd != -1) { |
| 1563 | close(fd); |
| 1564 | } |
Marcelo Tosatti | f9a49df | 2014-02-04 13:41:53 -0500 | [diff] [blame] | 1565 | return NULL; |
Marcelo Tosatti | c902760 | 2010-03-01 20:25:08 -0300 | [diff] [blame] | 1566 | } |
| 1567 | #endif |
| 1568 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1569 | /* Called with the ramlist lock held. */ |
Alex Williamson | d17b528 | 2010-06-25 11:08:38 -0600 | [diff] [blame] | 1570 | static ram_addr_t find_ram_offset(ram_addr_t size) |
| 1571 | { |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1572 | RAMBlock *block, *next_block; |
Alex Williamson | 3e837b2 | 2011-10-31 08:54:09 -0600 | [diff] [blame] | 1573 | ram_addr_t offset = RAM_ADDR_MAX, mingap = RAM_ADDR_MAX; |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1574 | |
Stefan Hajnoczi | 49cd9ac | 2013-03-11 10:20:21 +0100 | [diff] [blame] | 1575 | assert(size != 0); /* it would hand out same offset multiple times */ |
| 1576 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1577 | if (QLIST_EMPTY_RCU(&ram_list.blocks)) { |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1578 | return 0; |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 1579 | } |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1580 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1581 | QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { |
Anthony PERARD | f15fbc4 | 2011-07-20 08:17:42 +0000 | [diff] [blame] | 1582 | ram_addr_t end, next = RAM_ADDR_MAX; |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1583 | |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1584 | end = block->offset + block->max_length; |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1585 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1586 | QLIST_FOREACH_RCU(next_block, &ram_list.blocks, next) { |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1587 | if (next_block->offset >= end) { |
| 1588 | next = MIN(next, next_block->offset); |
| 1589 | } |
| 1590 | } |
| 1591 | if (next - end >= size && next - end < mingap) { |
Alex Williamson | 3e837b2 | 2011-10-31 08:54:09 -0600 | [diff] [blame] | 1592 | offset = end; |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1593 | mingap = next - end; |
| 1594 | } |
| 1595 | } |
Alex Williamson | 3e837b2 | 2011-10-31 08:54:09 -0600 | [diff] [blame] | 1596 | |
| 1597 | if (offset == RAM_ADDR_MAX) { |
| 1598 | fprintf(stderr, "Failed to find gap of requested size: %" PRIu64 "\n", |
| 1599 | (uint64_t)size); |
| 1600 | abort(); |
| 1601 | } |
| 1602 | |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1603 | return offset; |
| 1604 | } |
| 1605 | |
Juan Quintela | b8c4899 | 2017-03-21 17:44:30 +0100 | [diff] [blame] | 1606 | unsigned long last_ram_page(void) |
Alex Williamson | 04b1665 | 2010-07-02 11:13:17 -0600 | [diff] [blame] | 1607 | { |
Alex Williamson | d17b528 | 2010-06-25 11:08:38 -0600 | [diff] [blame] | 1608 | RAMBlock *block; |
| 1609 | ram_addr_t last = 0; |
| 1610 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1611 | rcu_read_lock(); |
| 1612 | QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1613 | last = MAX(last, block->offset + block->max_length); |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 1614 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1615 | rcu_read_unlock(); |
Juan Quintela | b8c4899 | 2017-03-21 17:44:30 +0100 | [diff] [blame] | 1616 | return last >> TARGET_PAGE_BITS; |
Alex Williamson | d17b528 | 2010-06-25 11:08:38 -0600 | [diff] [blame] | 1617 | } |
| 1618 | |
Jason Baron | ddb97f1 | 2012-08-02 15:44:16 -0400 | [diff] [blame] | 1619 | static void qemu_ram_setup_dump(void *addr, ram_addr_t size) |
| 1620 | { |
| 1621 | int ret; |
Jason Baron | ddb97f1 | 2012-08-02 15:44:16 -0400 | [diff] [blame] | 1622 | |
| 1623 | /* Use MADV_DONTDUMP, if user doesn't want the guest memory in the core */ |
Marcel Apfelbaum | 47c8ca5 | 2015-02-04 17:43:54 +0200 | [diff] [blame] | 1624 | if (!machine_dump_guest_core(current_machine)) { |
Jason Baron | ddb97f1 | 2012-08-02 15:44:16 -0400 | [diff] [blame] | 1625 | ret = qemu_madvise(addr, size, QEMU_MADV_DONTDUMP); |
| 1626 | if (ret) { |
| 1627 | perror("qemu_madvise"); |
| 1628 | fprintf(stderr, "madvise doesn't support MADV_DONTDUMP, " |
| 1629 | "but dump_guest_core=off specified\n"); |
| 1630 | } |
| 1631 | } |
| 1632 | } |
| 1633 | |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 1634 | const char *qemu_ram_get_idstr(RAMBlock *rb) |
| 1635 | { |
| 1636 | return rb->idstr; |
| 1637 | } |
| 1638 | |
Dr. David Alan Gilbert | 463a4ac | 2017-03-07 18:36:36 +0000 | [diff] [blame] | 1639 | bool qemu_ram_is_shared(RAMBlock *rb) |
| 1640 | { |
| 1641 | return rb->flags & RAM_SHARED; |
| 1642 | } |
| 1643 | |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1644 | /* Called with iothread lock held. */ |
Gonglei | fa53a0e | 2016-05-10 10:04:59 +0800 | [diff] [blame] | 1645 | void qemu_ram_set_idstr(RAMBlock *new_block, const char *name, DeviceState *dev) |
Hu Tao | 20cfe88 | 2014-04-02 15:13:26 +0800 | [diff] [blame] | 1646 | { |
Gonglei | fa53a0e | 2016-05-10 10:04:59 +0800 | [diff] [blame] | 1647 | RAMBlock *block; |
Hu Tao | 20cfe88 | 2014-04-02 15:13:26 +0800 | [diff] [blame] | 1648 | |
Avi Kivity | c5705a7 | 2011-12-20 15:59:12 +0200 | [diff] [blame] | 1649 | assert(new_block); |
| 1650 | assert(!new_block->idstr[0]); |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 1651 | |
Anthony Liguori | 09e5ab6 | 2012-02-03 12:28:43 -0600 | [diff] [blame] | 1652 | if (dev) { |
| 1653 | char *id = qdev_get_dev_path(dev); |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 1654 | if (id) { |
| 1655 | snprintf(new_block->idstr, sizeof(new_block->idstr), "%s/", id); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 1656 | g_free(id); |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 1657 | } |
| 1658 | } |
| 1659 | pstrcat(new_block->idstr, sizeof(new_block->idstr), name); |
| 1660 | |
Gonglei | ab0a995 | 2016-05-10 10:05:00 +0800 | [diff] [blame] | 1661 | rcu_read_lock(); |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1662 | QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { |
Gonglei | fa53a0e | 2016-05-10 10:04:59 +0800 | [diff] [blame] | 1663 | if (block != new_block && |
| 1664 | !strcmp(block->idstr, new_block->idstr)) { |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 1665 | fprintf(stderr, "RAMBlock \"%s\" already registered, abort!\n", |
| 1666 | new_block->idstr); |
| 1667 | abort(); |
| 1668 | } |
| 1669 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1670 | rcu_read_unlock(); |
Avi Kivity | c5705a7 | 2011-12-20 15:59:12 +0200 | [diff] [blame] | 1671 | } |
| 1672 | |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1673 | /* Called with iothread lock held. */ |
Gonglei | fa53a0e | 2016-05-10 10:04:59 +0800 | [diff] [blame] | 1674 | void qemu_ram_unset_idstr(RAMBlock *block) |
Hu Tao | 20cfe88 | 2014-04-02 15:13:26 +0800 | [diff] [blame] | 1675 | { |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1676 | /* FIXME: arch_init.c assumes that this is not called throughout |
| 1677 | * migration. Ignore the problem since hot-unplug during migration |
| 1678 | * does not work anyway. |
| 1679 | */ |
Hu Tao | 20cfe88 | 2014-04-02 15:13:26 +0800 | [diff] [blame] | 1680 | if (block) { |
| 1681 | memset(block->idstr, 0, sizeof(block->idstr)); |
| 1682 | } |
| 1683 | } |
| 1684 | |
Dr. David Alan Gilbert | 863e962 | 2016-09-29 20:09:37 +0100 | [diff] [blame] | 1685 | size_t qemu_ram_pagesize(RAMBlock *rb) |
| 1686 | { |
| 1687 | return rb->page_size; |
| 1688 | } |
| 1689 | |
Dr. David Alan Gilbert | 67f11b5 | 2017-02-24 18:28:34 +0000 | [diff] [blame] | 1690 | /* Returns the largest size of page in use */ |
| 1691 | size_t qemu_ram_pagesize_largest(void) |
| 1692 | { |
| 1693 | RAMBlock *block; |
| 1694 | size_t largest = 0; |
| 1695 | |
| 1696 | QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { |
| 1697 | largest = MAX(largest, qemu_ram_pagesize(block)); |
| 1698 | } |
| 1699 | |
| 1700 | return largest; |
| 1701 | } |
| 1702 | |
Luiz Capitulino | 8490fc7 | 2012-09-05 16:50:16 -0300 | [diff] [blame] | 1703 | static int memory_try_enable_merging(void *addr, size_t len) |
| 1704 | { |
Marcel Apfelbaum | 75cc7f0 | 2015-02-04 17:43:55 +0200 | [diff] [blame] | 1705 | if (!machine_mem_merge(current_machine)) { |
Luiz Capitulino | 8490fc7 | 2012-09-05 16:50:16 -0300 | [diff] [blame] | 1706 | /* disabled by the user */ |
| 1707 | return 0; |
| 1708 | } |
| 1709 | |
| 1710 | return qemu_madvise(addr, len, QEMU_MADV_MERGEABLE); |
| 1711 | } |
| 1712 | |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1713 | /* Only legal before guest might have detected the memory size: e.g. on |
| 1714 | * incoming migration, or right after reset. |
| 1715 | * |
| 1716 | * As memory core doesn't know how is memory accessed, it is up to |
| 1717 | * resize callback to update device state and/or add assertions to detect |
| 1718 | * misuse, if necessary. |
| 1719 | */ |
Gonglei | fa53a0e | 2016-05-10 10:04:59 +0800 | [diff] [blame] | 1720 | int qemu_ram_resize(RAMBlock *block, ram_addr_t newsize, Error **errp) |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1721 | { |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1722 | assert(block); |
| 1723 | |
Dr. David Alan Gilbert | 4ed023c | 2015-11-05 18:11:16 +0000 | [diff] [blame] | 1724 | newsize = HOST_PAGE_ALIGN(newsize); |
Michael S. Tsirkin | 129ddaf | 2015-02-17 10:15:30 +0100 | [diff] [blame] | 1725 | |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1726 | if (block->used_length == newsize) { |
| 1727 | return 0; |
| 1728 | } |
| 1729 | |
| 1730 | if (!(block->flags & RAM_RESIZEABLE)) { |
| 1731 | error_setg_errno(errp, EINVAL, |
| 1732 | "Length mismatch: %s: 0x" RAM_ADDR_FMT |
| 1733 | " in != 0x" RAM_ADDR_FMT, block->idstr, |
| 1734 | newsize, block->used_length); |
| 1735 | return -EINVAL; |
| 1736 | } |
| 1737 | |
| 1738 | if (block->max_length < newsize) { |
| 1739 | error_setg_errno(errp, EINVAL, |
| 1740 | "Length too large: %s: 0x" RAM_ADDR_FMT |
| 1741 | " > 0x" RAM_ADDR_FMT, block->idstr, |
| 1742 | newsize, block->max_length); |
| 1743 | return -EINVAL; |
| 1744 | } |
| 1745 | |
| 1746 | cpu_physical_memory_clear_dirty_range(block->offset, block->used_length); |
| 1747 | block->used_length = newsize; |
Paolo Bonzini | 58d2707 | 2015-03-23 11:56:01 +0100 | [diff] [blame] | 1748 | cpu_physical_memory_set_dirty_range(block->offset, block->used_length, |
| 1749 | DIRTY_CLIENTS_ALL); |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1750 | memory_region_set_size(block->mr, newsize); |
| 1751 | if (block->resized) { |
| 1752 | block->resized(block->idstr, newsize, block->host); |
| 1753 | } |
| 1754 | return 0; |
| 1755 | } |
| 1756 | |
Stefan Hajnoczi | 5b82b70 | 2016-01-25 13:33:20 +0000 | [diff] [blame] | 1757 | /* Called with ram_list.mutex held */ |
| 1758 | static void dirty_memory_extend(ram_addr_t old_ram_size, |
| 1759 | ram_addr_t new_ram_size) |
| 1760 | { |
| 1761 | ram_addr_t old_num_blocks = DIV_ROUND_UP(old_ram_size, |
| 1762 | DIRTY_MEMORY_BLOCK_SIZE); |
| 1763 | ram_addr_t new_num_blocks = DIV_ROUND_UP(new_ram_size, |
| 1764 | DIRTY_MEMORY_BLOCK_SIZE); |
| 1765 | int i; |
| 1766 | |
| 1767 | /* Only need to extend if block count increased */ |
| 1768 | if (new_num_blocks <= old_num_blocks) { |
| 1769 | return; |
| 1770 | } |
| 1771 | |
| 1772 | for (i = 0; i < DIRTY_MEMORY_NUM; i++) { |
| 1773 | DirtyMemoryBlocks *old_blocks; |
| 1774 | DirtyMemoryBlocks *new_blocks; |
| 1775 | int j; |
| 1776 | |
| 1777 | old_blocks = atomic_rcu_read(&ram_list.dirty_memory[i]); |
| 1778 | new_blocks = g_malloc(sizeof(*new_blocks) + |
| 1779 | sizeof(new_blocks->blocks[0]) * new_num_blocks); |
| 1780 | |
| 1781 | if (old_num_blocks) { |
| 1782 | memcpy(new_blocks->blocks, old_blocks->blocks, |
| 1783 | old_num_blocks * sizeof(old_blocks->blocks[0])); |
| 1784 | } |
| 1785 | |
| 1786 | for (j = old_num_blocks; j < new_num_blocks; j++) { |
| 1787 | new_blocks->blocks[j] = bitmap_new(DIRTY_MEMORY_BLOCK_SIZE); |
| 1788 | } |
| 1789 | |
| 1790 | atomic_rcu_set(&ram_list.dirty_memory[i], new_blocks); |
| 1791 | |
| 1792 | if (old_blocks) { |
| 1793 | g_free_rcu(old_blocks, rcu); |
| 1794 | } |
| 1795 | } |
| 1796 | } |
| 1797 | |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1798 | static void ram_block_add(RAMBlock *new_block, Error **errp) |
Avi Kivity | c5705a7 | 2011-12-20 15:59:12 +0200 | [diff] [blame] | 1799 | { |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1800 | RAMBlock *block; |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 1801 | RAMBlock *last_block = NULL; |
Juan Quintela | 2152f5c | 2013-10-08 13:52:02 +0200 | [diff] [blame] | 1802 | ram_addr_t old_ram_size, new_ram_size; |
Markus Armbruster | 37aa7a0 | 2016-01-14 16:09:39 +0100 | [diff] [blame] | 1803 | Error *err = NULL; |
Juan Quintela | 2152f5c | 2013-10-08 13:52:02 +0200 | [diff] [blame] | 1804 | |
Juan Quintela | b8c4899 | 2017-03-21 17:44:30 +0100 | [diff] [blame] | 1805 | old_ram_size = last_ram_page(); |
Avi Kivity | c5705a7 | 2011-12-20 15:59:12 +0200 | [diff] [blame] | 1806 | |
Umesh Deshpande | b2a8658 | 2011-08-17 00:01:33 -0700 | [diff] [blame] | 1807 | qemu_mutex_lock_ramlist(); |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 1808 | new_block->offset = find_ram_offset(new_block->max_length); |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1809 | |
| 1810 | if (!new_block->host) { |
| 1811 | if (xen_enabled()) { |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 1812 | xen_ram_alloc(new_block->offset, new_block->max_length, |
Markus Armbruster | 37aa7a0 | 2016-01-14 16:09:39 +0100 | [diff] [blame] | 1813 | new_block->mr, &err); |
| 1814 | if (err) { |
| 1815 | error_propagate(errp, err); |
| 1816 | qemu_mutex_unlock_ramlist(); |
Paolo Bonzini | 39c350e | 2016-03-09 18:14:01 +0100 | [diff] [blame] | 1817 | return; |
Markus Armbruster | 37aa7a0 | 2016-01-14 16:09:39 +0100 | [diff] [blame] | 1818 | } |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1819 | } else { |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 1820 | new_block->host = phys_mem_alloc(new_block->max_length, |
Igor Mammedov | a2b257d | 2014-10-31 16:38:37 +0000 | [diff] [blame] | 1821 | &new_block->mr->align); |
Markus Armbruster | 3922825 | 2013-07-31 15:11:11 +0200 | [diff] [blame] | 1822 | if (!new_block->host) { |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 1823 | error_setg_errno(errp, errno, |
| 1824 | "cannot set up guest memory '%s'", |
| 1825 | memory_region_name(new_block->mr)); |
| 1826 | qemu_mutex_unlock_ramlist(); |
Paolo Bonzini | 39c350e | 2016-03-09 18:14:01 +0100 | [diff] [blame] | 1827 | return; |
Markus Armbruster | 3922825 | 2013-07-31 15:11:11 +0200 | [diff] [blame] | 1828 | } |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 1829 | memory_try_enable_merging(new_block->host, new_block->max_length); |
Yoshiaki Tamura | 6977dfe | 2010-08-18 15:41:49 +0900 | [diff] [blame] | 1830 | } |
| 1831 | } |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 1832 | |
Li Zhijian | dd63169 | 2015-07-02 20:18:06 +0800 | [diff] [blame] | 1833 | new_ram_size = MAX(old_ram_size, |
| 1834 | (new_block->offset + new_block->max_length) >> TARGET_PAGE_BITS); |
| 1835 | if (new_ram_size > old_ram_size) { |
Stefan Hajnoczi | 5b82b70 | 2016-01-25 13:33:20 +0000 | [diff] [blame] | 1836 | dirty_memory_extend(old_ram_size, new_ram_size); |
Li Zhijian | dd63169 | 2015-07-02 20:18:06 +0800 | [diff] [blame] | 1837 | } |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 1838 | /* Keep the list sorted from biggest to smallest block. Unlike QTAILQ, |
| 1839 | * QLIST (which has an RCU-friendly variant) does not have insertion at |
| 1840 | * tail, so save the last element in last_block. |
| 1841 | */ |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1842 | QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 1843 | last_block = block; |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 1844 | if (block->max_length < new_block->max_length) { |
Paolo Bonzini | abb26d6 | 2012-11-14 16:00:51 +0100 | [diff] [blame] | 1845 | break; |
| 1846 | } |
| 1847 | } |
| 1848 | if (block) { |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1849 | QLIST_INSERT_BEFORE_RCU(block, new_block, next); |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 1850 | } else if (last_block) { |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1851 | QLIST_INSERT_AFTER_RCU(last_block, new_block, next); |
Mike Day | 0d53d9f | 2015-01-21 13:45:24 +0100 | [diff] [blame] | 1852 | } else { /* list is empty */ |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1853 | QLIST_INSERT_HEAD_RCU(&ram_list.blocks, new_block, next); |
Paolo Bonzini | abb26d6 | 2012-11-14 16:00:51 +0100 | [diff] [blame] | 1854 | } |
Paolo Bonzini | 0d6d3c8 | 2012-11-14 15:45:02 +0100 | [diff] [blame] | 1855 | ram_list.mru_block = NULL; |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 1856 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 1857 | /* Write list before version */ |
| 1858 | smp_wmb(); |
Umesh Deshpande | f798b07 | 2011-08-18 11:41:17 -0700 | [diff] [blame] | 1859 | ram_list.version++; |
Umesh Deshpande | b2a8658 | 2011-08-17 00:01:33 -0700 | [diff] [blame] | 1860 | qemu_mutex_unlock_ramlist(); |
Umesh Deshpande | f798b07 | 2011-08-18 11:41:17 -0700 | [diff] [blame] | 1861 | |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 1862 | cpu_physical_memory_set_dirty_range(new_block->offset, |
Paolo Bonzini | 58d2707 | 2015-03-23 11:56:01 +0100 | [diff] [blame] | 1863 | new_block->used_length, |
| 1864 | DIRTY_CLIENTS_ALL); |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 1865 | |
Paolo Bonzini | a904c91 | 2015-01-21 16:18:35 +0100 | [diff] [blame] | 1866 | if (new_block->host) { |
| 1867 | qemu_ram_setup_dump(new_block->host, new_block->max_length); |
| 1868 | qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_HUGEPAGE); |
Cao jin | c2cd627 | 2016-09-12 14:34:56 +0800 | [diff] [blame] | 1869 | /* MADV_DONTFORK is also needed by KVM in absence of synchronous MMU */ |
Paolo Bonzini | a904c91 | 2015-01-21 16:18:35 +0100 | [diff] [blame] | 1870 | qemu_madvise(new_block->host, new_block->max_length, QEMU_MADV_DONTFORK); |
Paolo Bonzini | 0987d73 | 2016-12-21 00:31:36 +0800 | [diff] [blame] | 1871 | ram_block_notify_add(new_block->host, new_block->max_length); |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1872 | } |
Cam Macdonell | 84b89d7 | 2010-07-26 18:10:57 -0600 | [diff] [blame] | 1873 | } |
| 1874 | |
Paolo Bonzini | 0b183fc | 2014-05-14 17:43:19 +0800 | [diff] [blame] | 1875 | #ifdef __linux__ |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1876 | RAMBlock *qemu_ram_alloc_from_file(ram_addr_t size, MemoryRegion *mr, |
| 1877 | bool share, const char *mem_path, |
| 1878 | Error **errp) |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1879 | { |
| 1880 | RAMBlock *new_block; |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 1881 | Error *local_err = NULL; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1882 | |
| 1883 | if (xen_enabled()) { |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 1884 | error_setg(errp, "-mem-path not supported with Xen"); |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1885 | return NULL; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1886 | } |
| 1887 | |
| 1888 | if (phys_mem_alloc != qemu_anon_ram_alloc) { |
| 1889 | /* |
| 1890 | * file_ram_alloc() needs to allocate just like |
| 1891 | * phys_mem_alloc, but we haven't bothered to provide |
| 1892 | * a hook there. |
| 1893 | */ |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 1894 | error_setg(errp, |
| 1895 | "-mem-path not supported with this accelerator"); |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1896 | return NULL; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1897 | } |
| 1898 | |
Dr. David Alan Gilbert | 4ed023c | 2015-11-05 18:11:16 +0000 | [diff] [blame] | 1899 | size = HOST_PAGE_ALIGN(size); |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1900 | new_block = g_malloc0(sizeof(*new_block)); |
| 1901 | new_block->mr = mr; |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 1902 | new_block->used_length = size; |
| 1903 | new_block->max_length = size; |
Paolo Bonzini | dbcb898 | 2014-06-10 19:15:24 +0800 | [diff] [blame] | 1904 | new_block->flags = share ? RAM_SHARED : 0; |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 1905 | new_block->host = file_ram_alloc(new_block, size, |
| 1906 | mem_path, errp); |
| 1907 | if (!new_block->host) { |
| 1908 | g_free(new_block); |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1909 | return NULL; |
Paolo Bonzini | 7f56e74 | 2014-05-14 17:43:20 +0800 | [diff] [blame] | 1910 | } |
| 1911 | |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1912 | ram_block_add(new_block, &local_err); |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 1913 | if (local_err) { |
| 1914 | g_free(new_block); |
| 1915 | error_propagate(errp, local_err); |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1916 | return NULL; |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 1917 | } |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1918 | return new_block; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1919 | } |
Paolo Bonzini | 0b183fc | 2014-05-14 17:43:19 +0800 | [diff] [blame] | 1920 | #endif |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1921 | |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1922 | static |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1923 | RAMBlock *qemu_ram_alloc_internal(ram_addr_t size, ram_addr_t max_size, |
| 1924 | void (*resized)(const char*, |
| 1925 | uint64_t length, |
| 1926 | void *host), |
| 1927 | void *host, bool resizeable, |
| 1928 | MemoryRegion *mr, Error **errp) |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1929 | { |
| 1930 | RAMBlock *new_block; |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 1931 | Error *local_err = NULL; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1932 | |
Dr. David Alan Gilbert | 4ed023c | 2015-11-05 18:11:16 +0000 | [diff] [blame] | 1933 | size = HOST_PAGE_ALIGN(size); |
| 1934 | max_size = HOST_PAGE_ALIGN(max_size); |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1935 | new_block = g_malloc0(sizeof(*new_block)); |
| 1936 | new_block->mr = mr; |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1937 | new_block->resized = resized; |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 1938 | new_block->used_length = size; |
| 1939 | new_block->max_length = max_size; |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1940 | assert(max_size >= size); |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1941 | new_block->fd = -1; |
Dr. David Alan Gilbert | 863e962 | 2016-09-29 20:09:37 +0100 | [diff] [blame] | 1942 | new_block->page_size = getpagesize(); |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1943 | new_block->host = host; |
| 1944 | if (host) { |
Paolo Bonzini | 7bd4f43 | 2014-05-14 17:43:22 +0800 | [diff] [blame] | 1945 | new_block->flags |= RAM_PREALLOC; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1946 | } |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1947 | if (resizeable) { |
| 1948 | new_block->flags |= RAM_RESIZEABLE; |
| 1949 | } |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1950 | ram_block_add(new_block, &local_err); |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 1951 | if (local_err) { |
| 1952 | g_free(new_block); |
| 1953 | error_propagate(errp, local_err); |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1954 | return NULL; |
Hu Tao | ef701d7 | 2014-09-09 13:27:54 +0800 | [diff] [blame] | 1955 | } |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1956 | return new_block; |
Paolo Bonzini | e1c57ab | 2014-05-14 17:43:18 +0800 | [diff] [blame] | 1957 | } |
| 1958 | |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1959 | RAMBlock *qemu_ram_alloc_from_ptr(ram_addr_t size, void *host, |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1960 | MemoryRegion *mr, Error **errp) |
| 1961 | { |
| 1962 | return qemu_ram_alloc_internal(size, size, NULL, host, false, mr, errp); |
| 1963 | } |
| 1964 | |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1965 | RAMBlock *qemu_ram_alloc(ram_addr_t size, MemoryRegion *mr, Error **errp) |
pbrook | 94a6b54 | 2009-04-11 17:15:54 +0000 | [diff] [blame] | 1966 | { |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1967 | return qemu_ram_alloc_internal(size, size, NULL, NULL, false, mr, errp); |
| 1968 | } |
| 1969 | |
Fam Zheng | 528f46a | 2016-03-01 14:18:18 +0800 | [diff] [blame] | 1970 | RAMBlock *qemu_ram_alloc_resizeable(ram_addr_t size, ram_addr_t maxsz, |
Michael S. Tsirkin | 62be4e3 | 2014-11-12 14:27:41 +0200 | [diff] [blame] | 1971 | void (*resized)(const char*, |
| 1972 | uint64_t length, |
| 1973 | void *host), |
| 1974 | MemoryRegion *mr, Error **errp) |
| 1975 | { |
| 1976 | return qemu_ram_alloc_internal(size, maxsz, resized, NULL, true, mr, errp); |
pbrook | 94a6b54 | 2009-04-11 17:15:54 +0000 | [diff] [blame] | 1977 | } |
bellard | e9a1ab1 | 2007-02-08 23:08:38 +0000 | [diff] [blame] | 1978 | |
Paolo Bonzini | 4377153 | 2013-09-09 17:58:40 +0200 | [diff] [blame] | 1979 | static void reclaim_ramblock(RAMBlock *block) |
| 1980 | { |
| 1981 | if (block->flags & RAM_PREALLOC) { |
| 1982 | ; |
| 1983 | } else if (xen_enabled()) { |
| 1984 | xen_invalidate_map_cache_entry(block->host); |
| 1985 | #ifndef _WIN32 |
| 1986 | } else if (block->fd >= 0) { |
Eduardo Habkost | 2f3a2bb | 2015-11-06 20:11:21 -0200 | [diff] [blame] | 1987 | qemu_ram_munmap(block->host, block->max_length); |
Paolo Bonzini | 4377153 | 2013-09-09 17:58:40 +0200 | [diff] [blame] | 1988 | close(block->fd); |
| 1989 | #endif |
| 1990 | } else { |
| 1991 | qemu_anon_ram_free(block->host, block->max_length); |
| 1992 | } |
| 1993 | g_free(block); |
| 1994 | } |
| 1995 | |
Fam Zheng | f1060c5 | 2016-03-01 14:18:22 +0800 | [diff] [blame] | 1996 | void qemu_ram_free(RAMBlock *block) |
bellard | e9a1ab1 | 2007-02-08 23:08:38 +0000 | [diff] [blame] | 1997 | { |
Marc-André Lureau | 85bc2a1 | 2016-03-29 13:20:51 +0200 | [diff] [blame] | 1998 | if (!block) { |
| 1999 | return; |
| 2000 | } |
| 2001 | |
Paolo Bonzini | 0987d73 | 2016-12-21 00:31:36 +0800 | [diff] [blame] | 2002 | if (block->host) { |
| 2003 | ram_block_notify_remove(block->host, block->max_length); |
| 2004 | } |
| 2005 | |
Umesh Deshpande | b2a8658 | 2011-08-17 00:01:33 -0700 | [diff] [blame] | 2006 | qemu_mutex_lock_ramlist(); |
Fam Zheng | f1060c5 | 2016-03-01 14:18:22 +0800 | [diff] [blame] | 2007 | QLIST_REMOVE_RCU(block, next); |
| 2008 | ram_list.mru_block = NULL; |
| 2009 | /* Write list before version */ |
| 2010 | smp_wmb(); |
| 2011 | ram_list.version++; |
| 2012 | call_rcu(block, reclaim_ramblock, rcu); |
Umesh Deshpande | b2a8658 | 2011-08-17 00:01:33 -0700 | [diff] [blame] | 2013 | qemu_mutex_unlock_ramlist(); |
bellard | e9a1ab1 | 2007-02-08 23:08:38 +0000 | [diff] [blame] | 2014 | } |
| 2015 | |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2016 | #ifndef _WIN32 |
| 2017 | void qemu_ram_remap(ram_addr_t addr, ram_addr_t length) |
| 2018 | { |
| 2019 | RAMBlock *block; |
| 2020 | ram_addr_t offset; |
| 2021 | int flags; |
| 2022 | void *area, *vaddr; |
| 2023 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2024 | QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2025 | offset = addr - block->offset; |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2026 | if (offset < block->max_length) { |
Michael S. Tsirkin | 1240be2 | 2014-11-12 11:44:41 +0200 | [diff] [blame] | 2027 | vaddr = ramblock_ptr(block, offset); |
Paolo Bonzini | 7bd4f43 | 2014-05-14 17:43:22 +0800 | [diff] [blame] | 2028 | if (block->flags & RAM_PREALLOC) { |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2029 | ; |
Markus Armbruster | dfeaf2a | 2013-07-31 15:11:05 +0200 | [diff] [blame] | 2030 | } else if (xen_enabled()) { |
| 2031 | abort(); |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2032 | } else { |
| 2033 | flags = MAP_FIXED; |
Markus Armbruster | 3435f39 | 2013-07-31 15:11:07 +0200 | [diff] [blame] | 2034 | if (block->fd >= 0) { |
Paolo Bonzini | dbcb898 | 2014-06-10 19:15:24 +0800 | [diff] [blame] | 2035 | flags |= (block->flags & RAM_SHARED ? |
| 2036 | MAP_SHARED : MAP_PRIVATE); |
Markus Armbruster | 3435f39 | 2013-07-31 15:11:07 +0200 | [diff] [blame] | 2037 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, |
| 2038 | flags, block->fd, offset); |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2039 | } else { |
Markus Armbruster | 2eb9fba | 2013-07-31 15:11:09 +0200 | [diff] [blame] | 2040 | /* |
| 2041 | * Remap needs to match alloc. Accelerators that |
| 2042 | * set phys_mem_alloc never remap. If they did, |
| 2043 | * we'd need a remap hook here. |
| 2044 | */ |
| 2045 | assert(phys_mem_alloc == qemu_anon_ram_alloc); |
| 2046 | |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2047 | flags |= MAP_PRIVATE | MAP_ANONYMOUS; |
| 2048 | area = mmap(vaddr, length, PROT_READ | PROT_WRITE, |
| 2049 | flags, -1, 0); |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2050 | } |
| 2051 | if (area != vaddr) { |
Anthony PERARD | f15fbc4 | 2011-07-20 08:17:42 +0000 | [diff] [blame] | 2052 | fprintf(stderr, "Could not remap addr: " |
| 2053 | RAM_ADDR_FMT "@" RAM_ADDR_FMT "\n", |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2054 | length, addr); |
| 2055 | exit(1); |
| 2056 | } |
Luiz Capitulino | 8490fc7 | 2012-09-05 16:50:16 -0300 | [diff] [blame] | 2057 | memory_try_enable_merging(vaddr, length); |
Jason Baron | ddb97f1 | 2012-08-02 15:44:16 -0400 | [diff] [blame] | 2058 | qemu_ram_setup_dump(vaddr, length); |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2059 | } |
Huang Ying | cd19cfa | 2011-03-02 08:56:19 +0100 | [diff] [blame] | 2060 | } |
| 2061 | } |
| 2062 | } |
| 2063 | #endif /* !_WIN32 */ |
| 2064 | |
Paolo Bonzini | 1b5ec23 | 2013-05-06 14:36:15 +0200 | [diff] [blame] | 2065 | /* Return a host pointer to ram allocated with qemu_ram_alloc. |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2066 | * This should not be used for general purpose DMA. Use address_space_map |
| 2067 | * or address_space_rw instead. For local memory (e.g. video ram) that the |
| 2068 | * device owns, use memory_region_get_ram_ptr. |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2069 | * |
Paolo Bonzini | 49b24af | 2015-12-16 10:30:47 +0100 | [diff] [blame] | 2070 | * Called within RCU critical section. |
Paolo Bonzini | 1b5ec23 | 2013-05-06 14:36:15 +0200 | [diff] [blame] | 2071 | */ |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2072 | void *qemu_map_ram_ptr(RAMBlock *ram_block, ram_addr_t addr) |
Paolo Bonzini | 1b5ec23 | 2013-05-06 14:36:15 +0200 | [diff] [blame] | 2073 | { |
Gonglei | 3655cb9 | 2016-02-20 10:35:20 +0800 | [diff] [blame] | 2074 | RAMBlock *block = ram_block; |
| 2075 | |
| 2076 | if (block == NULL) { |
| 2077 | block = qemu_get_ram_block(addr); |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2078 | addr -= block->offset; |
Gonglei | 3655cb9 | 2016-02-20 10:35:20 +0800 | [diff] [blame] | 2079 | } |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2080 | |
| 2081 | if (xen_enabled() && block->host == NULL) { |
Paolo Bonzini | 0d6d3c8 | 2012-11-14 15:45:02 +0100 | [diff] [blame] | 2082 | /* We need to check if the requested address is in the RAM |
| 2083 | * because we don't want to map the entire memory in QEMU. |
| 2084 | * In that case just map until the end of the page. |
| 2085 | */ |
| 2086 | if (block->offset == 0) { |
Stefano Stabellini | 1ff7c59 | 2017-05-03 14:00:35 -0700 | [diff] [blame^] | 2087 | return xen_map_cache(addr, 0, 0, false); |
Paolo Bonzini | 0d6d3c8 | 2012-11-14 15:45:02 +0100 | [diff] [blame] | 2088 | } |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2089 | |
Stefano Stabellini | 1ff7c59 | 2017-05-03 14:00:35 -0700 | [diff] [blame^] | 2090 | block->host = xen_map_cache(block->offset, block->max_length, 1, false); |
Paolo Bonzini | 0d6d3c8 | 2012-11-14 15:45:02 +0100 | [diff] [blame] | 2091 | } |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2092 | return ramblock_ptr(block, addr); |
pbrook | dc828ca | 2009-04-09 22:21:07 +0000 | [diff] [blame] | 2093 | } |
| 2094 | |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2095 | /* Return a host pointer to guest's ram. Similar to qemu_map_ram_ptr |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2096 | * but takes a size argument. |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2097 | * |
Paolo Bonzini | e81bcda | 2015-12-16 10:31:26 +0100 | [diff] [blame] | 2098 | * Called within RCU critical section. |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2099 | */ |
Gonglei | 3655cb9 | 2016-02-20 10:35:20 +0800 | [diff] [blame] | 2100 | static void *qemu_ram_ptr_length(RAMBlock *ram_block, ram_addr_t addr, |
| 2101 | hwaddr *size) |
Stefano Stabellini | 38bee5d | 2011-05-19 18:35:45 +0100 | [diff] [blame] | 2102 | { |
Gonglei | 3655cb9 | 2016-02-20 10:35:20 +0800 | [diff] [blame] | 2103 | RAMBlock *block = ram_block; |
Stefano Stabellini | 8ab934f | 2011-06-27 18:26:06 +0100 | [diff] [blame] | 2104 | if (*size == 0) { |
| 2105 | return NULL; |
| 2106 | } |
Paolo Bonzini | e81bcda | 2015-12-16 10:31:26 +0100 | [diff] [blame] | 2107 | |
Gonglei | 3655cb9 | 2016-02-20 10:35:20 +0800 | [diff] [blame] | 2108 | if (block == NULL) { |
| 2109 | block = qemu_get_ram_block(addr); |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2110 | addr -= block->offset; |
Gonglei | 3655cb9 | 2016-02-20 10:35:20 +0800 | [diff] [blame] | 2111 | } |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2112 | *size = MIN(*size, block->max_length - addr); |
Paolo Bonzini | e81bcda | 2015-12-16 10:31:26 +0100 | [diff] [blame] | 2113 | |
| 2114 | if (xen_enabled() && block->host == NULL) { |
| 2115 | /* We need to check if the requested address is in the RAM |
| 2116 | * because we don't want to map the entire memory in QEMU. |
| 2117 | * In that case just map the requested area. |
| 2118 | */ |
| 2119 | if (block->offset == 0) { |
Stefano Stabellini | 1ff7c59 | 2017-05-03 14:00:35 -0700 | [diff] [blame^] | 2120 | return xen_map_cache(addr, *size, 1, true); |
Stefano Stabellini | 38bee5d | 2011-05-19 18:35:45 +0100 | [diff] [blame] | 2121 | } |
| 2122 | |
Stefano Stabellini | 1ff7c59 | 2017-05-03 14:00:35 -0700 | [diff] [blame^] | 2123 | block->host = xen_map_cache(block->offset, block->max_length, 1, true); |
Stefano Stabellini | 38bee5d | 2011-05-19 18:35:45 +0100 | [diff] [blame] | 2124 | } |
Paolo Bonzini | e81bcda | 2015-12-16 10:31:26 +0100 | [diff] [blame] | 2125 | |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2126 | return ramblock_ptr(block, addr); |
Stefano Stabellini | 38bee5d | 2011-05-19 18:35:45 +0100 | [diff] [blame] | 2127 | } |
| 2128 | |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2129 | /* |
| 2130 | * Translates a host ptr back to a RAMBlock, a ram_addr and an offset |
| 2131 | * in that RAMBlock. |
| 2132 | * |
| 2133 | * ptr: Host pointer to look up |
| 2134 | * round_offset: If true round the result offset down to a page boundary |
| 2135 | * *ram_addr: set to result ram_addr |
| 2136 | * *offset: set to result offset within the RAMBlock |
| 2137 | * |
| 2138 | * Returns: RAMBlock (or NULL if not found) |
Mike Day | ae3a704 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2139 | * |
| 2140 | * By the time this function returns, the returned pointer is not protected |
| 2141 | * by RCU anymore. If the caller is not within an RCU critical section and |
| 2142 | * does not hold the iothread lock, it must have other means of protecting the |
| 2143 | * pointer, such as a reference to the region that includes the incoming |
| 2144 | * ram_addr_t. |
| 2145 | */ |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2146 | RAMBlock *qemu_ram_block_from_host(void *ptr, bool round_offset, |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2147 | ram_addr_t *offset) |
pbrook | 5579c7f | 2009-04-11 14:47:08 +0000 | [diff] [blame] | 2148 | { |
pbrook | 94a6b54 | 2009-04-11 17:15:54 +0000 | [diff] [blame] | 2149 | RAMBlock *block; |
| 2150 | uint8_t *host = ptr; |
| 2151 | |
Jan Kiszka | 868bb33 | 2011-06-21 22:59:09 +0200 | [diff] [blame] | 2152 | if (xen_enabled()) { |
Paolo Bonzini | f615f39 | 2016-05-26 10:07:50 +0200 | [diff] [blame] | 2153 | ram_addr_t ram_addr; |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2154 | rcu_read_lock(); |
Paolo Bonzini | f615f39 | 2016-05-26 10:07:50 +0200 | [diff] [blame] | 2155 | ram_addr = xen_ram_addr_from_mapcache(ptr); |
| 2156 | block = qemu_get_ram_block(ram_addr); |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2157 | if (block) { |
Anthony PERARD | d6b6aec | 2016-06-09 16:56:17 +0100 | [diff] [blame] | 2158 | *offset = ram_addr - block->offset; |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2159 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2160 | rcu_read_unlock(); |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2161 | return block; |
Stefano Stabellini | 712c2b4 | 2011-05-19 18:35:46 +0100 | [diff] [blame] | 2162 | } |
| 2163 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2164 | rcu_read_lock(); |
| 2165 | block = atomic_rcu_read(&ram_list.mru_block); |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2166 | if (block && block->host && host - block->host < block->max_length) { |
Paolo Bonzini | 23887b7 | 2013-05-06 14:28:39 +0200 | [diff] [blame] | 2167 | goto found; |
| 2168 | } |
| 2169 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2170 | QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { |
Jun Nakajima | 432d268 | 2010-08-31 16:41:25 +0100 | [diff] [blame] | 2171 | /* This case append when the block is not mapped. */ |
| 2172 | if (block->host == NULL) { |
| 2173 | continue; |
| 2174 | } |
Michael S. Tsirkin | 9b8424d | 2014-12-15 22:55:32 +0200 | [diff] [blame] | 2175 | if (host - block->host < block->max_length) { |
Paolo Bonzini | 23887b7 | 2013-05-06 14:28:39 +0200 | [diff] [blame] | 2176 | goto found; |
Alex Williamson | f471a17 | 2010-06-11 11:11:42 -0600 | [diff] [blame] | 2177 | } |
pbrook | 94a6b54 | 2009-04-11 17:15:54 +0000 | [diff] [blame] | 2178 | } |
Jun Nakajima | 432d268 | 2010-08-31 16:41:25 +0100 | [diff] [blame] | 2179 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2180 | rcu_read_unlock(); |
Paolo Bonzini | 1b5ec23 | 2013-05-06 14:36:15 +0200 | [diff] [blame] | 2181 | return NULL; |
Paolo Bonzini | 23887b7 | 2013-05-06 14:28:39 +0200 | [diff] [blame] | 2182 | |
| 2183 | found: |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2184 | *offset = (host - block->host); |
| 2185 | if (round_offset) { |
| 2186 | *offset &= TARGET_PAGE_MASK; |
| 2187 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 2188 | rcu_read_unlock(); |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2189 | return block; |
| 2190 | } |
| 2191 | |
Dr. David Alan Gilbert | e3dd749 | 2015-11-05 18:10:33 +0000 | [diff] [blame] | 2192 | /* |
| 2193 | * Finds the named RAMBlock |
| 2194 | * |
| 2195 | * name: The name of RAMBlock to find |
| 2196 | * |
| 2197 | * Returns: RAMBlock (or NULL if not found) |
| 2198 | */ |
| 2199 | RAMBlock *qemu_ram_block_by_name(const char *name) |
| 2200 | { |
| 2201 | RAMBlock *block; |
| 2202 | |
| 2203 | QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { |
| 2204 | if (!strcmp(name, block->idstr)) { |
| 2205 | return block; |
| 2206 | } |
| 2207 | } |
| 2208 | |
| 2209 | return NULL; |
| 2210 | } |
| 2211 | |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2212 | /* Some of the softmmu routines need to translate from a host pointer |
| 2213 | (typically a TLB entry) back to a ram offset. */ |
Paolo Bonzini | 07bdaa4 | 2016-03-25 12:55:08 +0100 | [diff] [blame] | 2214 | ram_addr_t qemu_ram_addr_from_host(void *ptr) |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2215 | { |
| 2216 | RAMBlock *block; |
Paolo Bonzini | f615f39 | 2016-05-26 10:07:50 +0200 | [diff] [blame] | 2217 | ram_addr_t offset; |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2218 | |
Paolo Bonzini | f615f39 | 2016-05-26 10:07:50 +0200 | [diff] [blame] | 2219 | block = qemu_ram_block_from_host(ptr, false, &offset); |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2220 | if (!block) { |
Paolo Bonzini | 07bdaa4 | 2016-03-25 12:55:08 +0100 | [diff] [blame] | 2221 | return RAM_ADDR_INVALID; |
Dr. David Alan Gilbert | 422148d | 2015-11-05 18:10:32 +0000 | [diff] [blame] | 2222 | } |
| 2223 | |
Paolo Bonzini | 07bdaa4 | 2016-03-25 12:55:08 +0100 | [diff] [blame] | 2224 | return block->offset + offset; |
Marcelo Tosatti | e890261 | 2010-10-11 15:31:19 -0300 | [diff] [blame] | 2225 | } |
Alex Williamson | f471a17 | 2010-06-11 11:11:42 -0600 | [diff] [blame] | 2226 | |
Paolo Bonzini | 49b24af | 2015-12-16 10:30:47 +0100 | [diff] [blame] | 2227 | /* Called within RCU critical section. */ |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 2228 | static void notdirty_mem_write(void *opaque, hwaddr ram_addr, |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2229 | uint64_t val, unsigned size) |
bellard | 1ccde1c | 2004-02-06 19:46:14 +0000 | [diff] [blame] | 2230 | { |
Alex Bennée | ba051fb | 2016-10-27 16:10:16 +0100 | [diff] [blame] | 2231 | bool locked = false; |
| 2232 | |
Juan Quintela | 5215919 | 2013-10-08 12:44:04 +0200 | [diff] [blame] | 2233 | if (!cpu_physical_memory_get_dirty_flag(ram_addr, DIRTY_MEMORY_CODE)) { |
Alex Bennée | ba051fb | 2016-10-27 16:10:16 +0100 | [diff] [blame] | 2234 | locked = true; |
| 2235 | tb_lock(); |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2236 | tb_invalidate_phys_page_fast(ram_addr, size); |
bellard | 3a7d929 | 2005-08-21 09:26:42 +0000 | [diff] [blame] | 2237 | } |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2238 | switch (size) { |
| 2239 | case 1: |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2240 | stb_p(qemu_map_ram_ptr(NULL, ram_addr), val); |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2241 | break; |
| 2242 | case 2: |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2243 | stw_p(qemu_map_ram_ptr(NULL, ram_addr), val); |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2244 | break; |
| 2245 | case 4: |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2246 | stl_p(qemu_map_ram_ptr(NULL, ram_addr), val); |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2247 | break; |
| 2248 | default: |
| 2249 | abort(); |
| 2250 | } |
Alex Bennée | ba051fb | 2016-10-27 16:10:16 +0100 | [diff] [blame] | 2251 | |
| 2252 | if (locked) { |
| 2253 | tb_unlock(); |
| 2254 | } |
| 2255 | |
Paolo Bonzini | 58d2707 | 2015-03-23 11:56:01 +0100 | [diff] [blame] | 2256 | /* Set both VGA and migration bits for simplicity and to remove |
| 2257 | * the notdirty callback faster. |
| 2258 | */ |
| 2259 | cpu_physical_memory_set_dirty_range(ram_addr, size, |
| 2260 | DIRTY_CLIENTS_NOCODE); |
bellard | f23db16 | 2005-08-21 19:12:28 +0000 | [diff] [blame] | 2261 | /* we remove the notdirty callback only if the code has been |
| 2262 | flushed */ |
Juan Quintela | a2cd8c8 | 2013-10-10 11:20:22 +0200 | [diff] [blame] | 2263 | if (!cpu_physical_memory_is_clean(ram_addr)) { |
Peter Crosthwaite | bcae01e | 2015-09-10 22:39:42 -0700 | [diff] [blame] | 2264 | tlb_set_dirty(current_cpu, current_cpu->mem_io_vaddr); |
Andreas Färber | 4917cf4 | 2013-05-27 05:17:50 +0200 | [diff] [blame] | 2265 | } |
bellard | 1ccde1c | 2004-02-06 19:46:14 +0000 | [diff] [blame] | 2266 | } |
| 2267 | |
Paolo Bonzini | b018ddf | 2013-05-24 14:48:38 +0200 | [diff] [blame] | 2268 | static bool notdirty_mem_accepts(void *opaque, hwaddr addr, |
| 2269 | unsigned size, bool is_write) |
| 2270 | { |
| 2271 | return is_write; |
| 2272 | } |
| 2273 | |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2274 | static const MemoryRegionOps notdirty_mem_ops = { |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2275 | .write = notdirty_mem_write, |
Paolo Bonzini | b018ddf | 2013-05-24 14:48:38 +0200 | [diff] [blame] | 2276 | .valid.accepts = notdirty_mem_accepts, |
Avi Kivity | 0e0df1e | 2012-01-02 00:32:15 +0200 | [diff] [blame] | 2277 | .endianness = DEVICE_NATIVE_ENDIAN, |
bellard | 1ccde1c | 2004-02-06 19:46:14 +0000 | [diff] [blame] | 2278 | }; |
| 2279 | |
pbrook | 0f459d1 | 2008-06-09 00:20:13 +0000 | [diff] [blame] | 2280 | /* Generate a debug exception if a watchpoint has been hit. */ |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2281 | static void check_watchpoint(int offset, int len, MemTxAttrs attrs, int flags) |
pbrook | 0f459d1 | 2008-06-09 00:20:13 +0000 | [diff] [blame] | 2282 | { |
Andreas Färber | 93afead | 2013-08-26 03:41:01 +0200 | [diff] [blame] | 2283 | CPUState *cpu = current_cpu; |
Sergey Fedorov | 568496c | 2016-02-11 11:17:32 +0000 | [diff] [blame] | 2284 | CPUClass *cc = CPU_GET_CLASS(cpu); |
Andreas Färber | 93afead | 2013-08-26 03:41:01 +0200 | [diff] [blame] | 2285 | CPUArchState *env = cpu->env_ptr; |
aliguori | 06d55cc | 2008-11-18 20:24:06 +0000 | [diff] [blame] | 2286 | target_ulong pc, cs_base; |
pbrook | 0f459d1 | 2008-06-09 00:20:13 +0000 | [diff] [blame] | 2287 | target_ulong vaddr; |
aliguori | a1d1bb3 | 2008-11-18 20:07:32 +0000 | [diff] [blame] | 2288 | CPUWatchpoint *wp; |
Emilio G. Cota | 89fee74 | 2016-04-07 13:19:22 -0400 | [diff] [blame] | 2289 | uint32_t cpu_flags; |
pbrook | 0f459d1 | 2008-06-09 00:20:13 +0000 | [diff] [blame] | 2290 | |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 2291 | if (cpu->watchpoint_hit) { |
aliguori | 06d55cc | 2008-11-18 20:24:06 +0000 | [diff] [blame] | 2292 | /* We re-entered the check after replacing the TB. Now raise |
| 2293 | * the debug interrupt so that is will trigger after the |
| 2294 | * current instruction. */ |
Andreas Färber | 93afead | 2013-08-26 03:41:01 +0200 | [diff] [blame] | 2295 | cpu_interrupt(cpu, CPU_INTERRUPT_DEBUG); |
aliguori | 06d55cc | 2008-11-18 20:24:06 +0000 | [diff] [blame] | 2296 | return; |
| 2297 | } |
Andreas Färber | 93afead | 2013-08-26 03:41:01 +0200 | [diff] [blame] | 2298 | vaddr = (cpu->mem_io_vaddr & TARGET_PAGE_MASK) + offset; |
Julian Brown | 4061200 | 2017-02-07 18:29:59 +0000 | [diff] [blame] | 2299 | vaddr = cc->adjust_watchpoint_address(cpu, vaddr, len); |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 2300 | QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { |
Peter Maydell | 05068c0 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 2301 | if (cpu_watchpoint_address_matches(wp, vaddr, len) |
| 2302 | && (wp->flags & flags)) { |
Peter Maydell | 0822567 | 2014-09-12 14:06:48 +0100 | [diff] [blame] | 2303 | if (flags == BP_MEM_READ) { |
| 2304 | wp->flags |= BP_WATCHPOINT_HIT_READ; |
| 2305 | } else { |
| 2306 | wp->flags |= BP_WATCHPOINT_HIT_WRITE; |
| 2307 | } |
| 2308 | wp->hitaddr = vaddr; |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2309 | wp->hitattrs = attrs; |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 2310 | if (!cpu->watchpoint_hit) { |
Sergey Fedorov | 568496c | 2016-02-11 11:17:32 +0000 | [diff] [blame] | 2311 | if (wp->flags & BP_CPU && |
| 2312 | !cc->debug_check_watchpoint(cpu, wp)) { |
| 2313 | wp->flags &= ~BP_WATCHPOINT_HIT; |
| 2314 | continue; |
| 2315 | } |
Andreas Färber | ff4700b | 2013-08-26 18:23:18 +0200 | [diff] [blame] | 2316 | cpu->watchpoint_hit = wp; |
KONRAD Frederic | a5e9982 | 2016-10-27 16:10:06 +0100 | [diff] [blame] | 2317 | |
Jan Kiszka | 8d04fb5 | 2017-02-23 18:29:11 +0000 | [diff] [blame] | 2318 | /* Both tb_lock and iothread_mutex will be reset when |
| 2319 | * cpu_loop_exit or cpu_loop_exit_noexc longjmp |
| 2320 | * back into the cpu_exec main loop. |
KONRAD Frederic | a5e9982 | 2016-10-27 16:10:06 +0100 | [diff] [blame] | 2321 | */ |
| 2322 | tb_lock(); |
Andreas Färber | 239c51a | 2013-09-01 17:12:23 +0200 | [diff] [blame] | 2323 | tb_check_watchpoint(cpu); |
aliguori | 6e140f2 | 2008-11-18 20:37:55 +0000 | [diff] [blame] | 2324 | if (wp->flags & BP_STOP_BEFORE_ACCESS) { |
Andreas Färber | 2710342 | 2013-08-26 08:31:06 +0200 | [diff] [blame] | 2325 | cpu->exception_index = EXCP_DEBUG; |
Andreas Färber | 5638d18 | 2013-08-27 17:52:12 +0200 | [diff] [blame] | 2326 | cpu_loop_exit(cpu); |
aliguori | 6e140f2 | 2008-11-18 20:37:55 +0000 | [diff] [blame] | 2327 | } else { |
| 2328 | cpu_get_tb_cpu_state(env, &pc, &cs_base, &cpu_flags); |
Andreas Färber | 648f034 | 2013-09-01 17:43:17 +0200 | [diff] [blame] | 2329 | tb_gen_code(cpu, pc, cs_base, cpu_flags, 1); |
Peter Maydell | 6886b98 | 2016-05-17 15:18:04 +0100 | [diff] [blame] | 2330 | cpu_loop_exit_noexc(cpu); |
aliguori | 6e140f2 | 2008-11-18 20:37:55 +0000 | [diff] [blame] | 2331 | } |
aliguori | 06d55cc | 2008-11-18 20:24:06 +0000 | [diff] [blame] | 2332 | } |
aliguori | 6e140f2 | 2008-11-18 20:37:55 +0000 | [diff] [blame] | 2333 | } else { |
| 2334 | wp->flags &= ~BP_WATCHPOINT_HIT; |
pbrook | 0f459d1 | 2008-06-09 00:20:13 +0000 | [diff] [blame] | 2335 | } |
| 2336 | } |
| 2337 | } |
| 2338 | |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 2339 | /* Watchpoint access routines. Watchpoints are inserted using TLB tricks, |
| 2340 | so these check for a hit then pass through to the normal out-of-line |
| 2341 | phys routines. */ |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2342 | static MemTxResult watch_mem_read(void *opaque, hwaddr addr, uint64_t *pdata, |
| 2343 | unsigned size, MemTxAttrs attrs) |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 2344 | { |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2345 | MemTxResult res; |
| 2346 | uint64_t data; |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2347 | int asidx = cpu_asidx_from_attrs(current_cpu, attrs); |
| 2348 | AddressSpace *as = current_cpu->cpu_ases[asidx].as; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 2349 | |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2350 | check_watchpoint(addr & ~TARGET_PAGE_MASK, size, attrs, BP_MEM_READ); |
Avi Kivity | 1ec9b90 | 2012-01-02 12:47:48 +0200 | [diff] [blame] | 2351 | switch (size) { |
Max Filippov | 6736415 | 2012-01-29 00:01:40 +0400 | [diff] [blame] | 2352 | case 1: |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2353 | data = address_space_ldub(as, addr, attrs, &res); |
Max Filippov | 6736415 | 2012-01-29 00:01:40 +0400 | [diff] [blame] | 2354 | break; |
| 2355 | case 2: |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2356 | data = address_space_lduw(as, addr, attrs, &res); |
Max Filippov | 6736415 | 2012-01-29 00:01:40 +0400 | [diff] [blame] | 2357 | break; |
| 2358 | case 4: |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2359 | data = address_space_ldl(as, addr, attrs, &res); |
Max Filippov | 6736415 | 2012-01-29 00:01:40 +0400 | [diff] [blame] | 2360 | break; |
Avi Kivity | 1ec9b90 | 2012-01-02 12:47:48 +0200 | [diff] [blame] | 2361 | default: abort(); |
| 2362 | } |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2363 | *pdata = data; |
| 2364 | return res; |
| 2365 | } |
| 2366 | |
| 2367 | static MemTxResult watch_mem_write(void *opaque, hwaddr addr, |
| 2368 | uint64_t val, unsigned size, |
| 2369 | MemTxAttrs attrs) |
| 2370 | { |
| 2371 | MemTxResult res; |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2372 | int asidx = cpu_asidx_from_attrs(current_cpu, attrs); |
| 2373 | AddressSpace *as = current_cpu->cpu_ases[asidx].as; |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2374 | |
| 2375 | check_watchpoint(addr & ~TARGET_PAGE_MASK, size, attrs, BP_MEM_WRITE); |
| 2376 | switch (size) { |
| 2377 | case 1: |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2378 | address_space_stb(as, addr, val, attrs, &res); |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2379 | break; |
| 2380 | case 2: |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2381 | address_space_stw(as, addr, val, attrs, &res); |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2382 | break; |
| 2383 | case 4: |
Peter Maydell | 79ed041 | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 2384 | address_space_stl(as, addr, val, attrs, &res); |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2385 | break; |
| 2386 | default: abort(); |
| 2387 | } |
| 2388 | return res; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 2389 | } |
| 2390 | |
Avi Kivity | 1ec9b90 | 2012-01-02 12:47:48 +0200 | [diff] [blame] | 2391 | static const MemoryRegionOps watch_mem_ops = { |
Peter Maydell | 66b9b43 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2392 | .read_with_attrs = watch_mem_read, |
| 2393 | .write_with_attrs = watch_mem_write, |
Avi Kivity | 1ec9b90 | 2012-01-02 12:47:48 +0200 | [diff] [blame] | 2394 | .endianness = DEVICE_NATIVE_ENDIAN, |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 2395 | }; |
pbrook | 6658ffb | 2007-03-16 23:58:11 +0000 | [diff] [blame] | 2396 | |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2397 | static MemTxResult subpage_read(void *opaque, hwaddr addr, uint64_t *data, |
| 2398 | unsigned len, MemTxAttrs attrs) |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2399 | { |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2400 | subpage_t *subpage = opaque; |
Paolo Bonzini | ff6cff7 | 2014-12-22 13:11:39 +0100 | [diff] [blame] | 2401 | uint8_t buf[8]; |
Peter Maydell | 5c9eb02 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2402 | MemTxResult res; |
Paolo Bonzini | 791af8c | 2013-05-24 16:10:39 +0200 | [diff] [blame] | 2403 | |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2404 | #if defined(DEBUG_SUBPAGE) |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 2405 | printf("%s: subpage %p len %u addr " TARGET_FMT_plx "\n", __func__, |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2406 | subpage, len, addr); |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2407 | #endif |
Peter Maydell | 5c9eb02 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2408 | res = address_space_read(subpage->as, addr + subpage->base, |
| 2409 | attrs, buf, len); |
| 2410 | if (res) { |
| 2411 | return res; |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2412 | } |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2413 | switch (len) { |
| 2414 | case 1: |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2415 | *data = ldub_p(buf); |
| 2416 | return MEMTX_OK; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2417 | case 2: |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2418 | *data = lduw_p(buf); |
| 2419 | return MEMTX_OK; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2420 | case 4: |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2421 | *data = ldl_p(buf); |
| 2422 | return MEMTX_OK; |
Paolo Bonzini | ff6cff7 | 2014-12-22 13:11:39 +0100 | [diff] [blame] | 2423 | case 8: |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2424 | *data = ldq_p(buf); |
| 2425 | return MEMTX_OK; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2426 | default: |
| 2427 | abort(); |
| 2428 | } |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2429 | } |
| 2430 | |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2431 | static MemTxResult subpage_write(void *opaque, hwaddr addr, |
| 2432 | uint64_t value, unsigned len, MemTxAttrs attrs) |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2433 | { |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2434 | subpage_t *subpage = opaque; |
Paolo Bonzini | ff6cff7 | 2014-12-22 13:11:39 +0100 | [diff] [blame] | 2435 | uint8_t buf[8]; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2436 | |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2437 | #if defined(DEBUG_SUBPAGE) |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 2438 | printf("%s: subpage %p len %u addr " TARGET_FMT_plx |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2439 | " value %"PRIx64"\n", |
| 2440 | __func__, subpage, len, addr, value); |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2441 | #endif |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2442 | switch (len) { |
| 2443 | case 1: |
| 2444 | stb_p(buf, value); |
| 2445 | break; |
| 2446 | case 2: |
| 2447 | stw_p(buf, value); |
| 2448 | break; |
| 2449 | case 4: |
| 2450 | stl_p(buf, value); |
| 2451 | break; |
Paolo Bonzini | ff6cff7 | 2014-12-22 13:11:39 +0100 | [diff] [blame] | 2452 | case 8: |
| 2453 | stq_p(buf, value); |
| 2454 | break; |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2455 | default: |
| 2456 | abort(); |
| 2457 | } |
Peter Maydell | 5c9eb02 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2458 | return address_space_write(subpage->as, addr + subpage->base, |
| 2459 | attrs, buf, len); |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2460 | } |
| 2461 | |
Paolo Bonzini | c353e4c | 2013-05-24 14:02:39 +0200 | [diff] [blame] | 2462 | static bool subpage_accepts(void *opaque, hwaddr addr, |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 2463 | unsigned len, bool is_write) |
Paolo Bonzini | c353e4c | 2013-05-24 14:02:39 +0200 | [diff] [blame] | 2464 | { |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2465 | subpage_t *subpage = opaque; |
Paolo Bonzini | c353e4c | 2013-05-24 14:02:39 +0200 | [diff] [blame] | 2466 | #if defined(DEBUG_SUBPAGE) |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 2467 | printf("%s: subpage %p %c len %u addr " TARGET_FMT_plx "\n", |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2468 | __func__, subpage, is_write ? 'w' : 'r', len, addr); |
Paolo Bonzini | c353e4c | 2013-05-24 14:02:39 +0200 | [diff] [blame] | 2469 | #endif |
| 2470 | |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2471 | return address_space_access_valid(subpage->as, addr + subpage->base, |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 2472 | len, is_write); |
Paolo Bonzini | c353e4c | 2013-05-24 14:02:39 +0200 | [diff] [blame] | 2473 | } |
| 2474 | |
Avi Kivity | 70c68e4 | 2012-01-02 12:32:48 +0200 | [diff] [blame] | 2475 | static const MemoryRegionOps subpage_ops = { |
Peter Maydell | f25a49e | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2476 | .read_with_attrs = subpage_read, |
| 2477 | .write_with_attrs = subpage_write, |
Paolo Bonzini | ff6cff7 | 2014-12-22 13:11:39 +0100 | [diff] [blame] | 2478 | .impl.min_access_size = 1, |
| 2479 | .impl.max_access_size = 8, |
| 2480 | .valid.min_access_size = 1, |
| 2481 | .valid.max_access_size = 8, |
Paolo Bonzini | c353e4c | 2013-05-24 14:02:39 +0200 | [diff] [blame] | 2482 | .valid.accepts = subpage_accepts, |
Avi Kivity | 70c68e4 | 2012-01-02 12:32:48 +0200 | [diff] [blame] | 2483 | .endianness = DEVICE_NATIVE_ENDIAN, |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2484 | }; |
| 2485 | |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2486 | static int subpage_register (subpage_t *mmio, uint32_t start, uint32_t end, |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 2487 | uint16_t section) |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2488 | { |
| 2489 | int idx, eidx; |
| 2490 | |
| 2491 | if (start >= TARGET_PAGE_SIZE || end >= TARGET_PAGE_SIZE) |
| 2492 | return -1; |
| 2493 | idx = SUBPAGE_IDX(start); |
| 2494 | eidx = SUBPAGE_IDX(end); |
| 2495 | #if defined(DEBUG_SUBPAGE) |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 2496 | printf("%s: %p start %08x end %08x idx %08x eidx %08x section %d\n", |
| 2497 | __func__, mmio, start, end, idx, eidx, section); |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2498 | #endif |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2499 | for (; idx <= eidx; idx++) { |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 2500 | mmio->sub_section[idx] = section; |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2501 | } |
| 2502 | |
| 2503 | return 0; |
| 2504 | } |
| 2505 | |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2506 | static subpage_t *subpage_init(AddressSpace *as, hwaddr base) |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2507 | { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 2508 | subpage_t *mmio; |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2509 | |
Vijaya Kumar K | 2615fab | 2016-10-24 16:26:49 +0100 | [diff] [blame] | 2510 | mmio = g_malloc0(sizeof(subpage_t) + TARGET_PAGE_SIZE * sizeof(uint16_t)); |
Jan Kiszka | acc9d80 | 2013-05-26 21:55:37 +0200 | [diff] [blame] | 2511 | mmio->as = as; |
aliguori | 1eec614 | 2009-02-05 22:06:18 +0000 | [diff] [blame] | 2512 | mmio->base = base; |
Paolo Bonzini | 2c9b15c | 2013-06-06 05:41:28 -0400 | [diff] [blame] | 2513 | memory_region_init_io(&mmio->iomem, NULL, &subpage_ops, mmio, |
Peter Crosthwaite | b4fefef | 2014-06-05 23:15:52 -0700 | [diff] [blame] | 2514 | NULL, TARGET_PAGE_SIZE); |
Avi Kivity | b3b00c7 | 2012-01-02 13:20:11 +0200 | [diff] [blame] | 2515 | mmio->iomem.subpage = true; |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2516 | #if defined(DEBUG_SUBPAGE) |
Amos Kong | 016e9d6 | 2013-09-27 09:25:38 +0800 | [diff] [blame] | 2517 | printf("%s: %p base " TARGET_FMT_plx " len %08x\n", __func__, |
| 2518 | mmio, base, TARGET_PAGE_SIZE); |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2519 | #endif |
Liu Ping Fan | b41aac4 | 2013-05-29 11:09:17 +0200 | [diff] [blame] | 2520 | subpage_register(mmio, 0, TARGET_PAGE_SIZE-1, PHYS_SECTION_UNASSIGNED); |
blueswir1 | db7b542 | 2007-05-26 17:36:03 +0000 | [diff] [blame] | 2521 | |
| 2522 | return mmio; |
| 2523 | } |
| 2524 | |
Peter Crosthwaite | a656e22 | 2014-06-02 19:08:44 -0700 | [diff] [blame] | 2525 | static uint16_t dummy_section(PhysPageMap *map, AddressSpace *as, |
| 2526 | MemoryRegion *mr) |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 2527 | { |
Peter Crosthwaite | a656e22 | 2014-06-02 19:08:44 -0700 | [diff] [blame] | 2528 | assert(as); |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 2529 | MemoryRegionSection section = { |
Peter Crosthwaite | a656e22 | 2014-06-02 19:08:44 -0700 | [diff] [blame] | 2530 | .address_space = as, |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 2531 | .mr = mr, |
| 2532 | .offset_within_address_space = 0, |
| 2533 | .offset_within_region = 0, |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 2534 | .size = int128_2_64(), |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 2535 | }; |
| 2536 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 2537 | return phys_section_add(map, §ion); |
Avi Kivity | 5312bd8 | 2012-02-12 18:32:55 +0200 | [diff] [blame] | 2538 | } |
| 2539 | |
Peter Maydell | a54c87b | 2016-01-21 14:15:05 +0000 | [diff] [blame] | 2540 | MemoryRegion *iotlb_to_region(CPUState *cpu, hwaddr index, MemTxAttrs attrs) |
Avi Kivity | aa10223 | 2012-03-08 17:06:55 +0200 | [diff] [blame] | 2541 | { |
Peter Maydell | a54c87b | 2016-01-21 14:15:05 +0000 | [diff] [blame] | 2542 | int asidx = cpu_asidx_from_attrs(cpu, attrs); |
| 2543 | CPUAddressSpace *cpuas = &cpu->cpu_ases[asidx]; |
Peter Maydell | 32857f4 | 2015-10-01 15:29:50 +0100 | [diff] [blame] | 2544 | AddressSpaceDispatch *d = atomic_rcu_read(&cpuas->memory_dispatch); |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 2545 | MemoryRegionSection *sections = d->map.sections; |
Paolo Bonzini | 9d82b5a | 2013-08-16 08:26:30 +0200 | [diff] [blame] | 2546 | |
| 2547 | return sections[index & ~TARGET_PAGE_MASK].mr; |
Avi Kivity | aa10223 | 2012-03-08 17:06:55 +0200 | [diff] [blame] | 2548 | } |
| 2549 | |
Avi Kivity | e9179ce | 2009-06-14 11:38:52 +0300 | [diff] [blame] | 2550 | static void io_mem_init(void) |
| 2551 | { |
Paolo Bonzini | 1f6245e | 2014-06-13 10:48:06 +0200 | [diff] [blame] | 2552 | memory_region_init_io(&io_mem_rom, NULL, &unassigned_mem_ops, NULL, NULL, UINT64_MAX); |
Paolo Bonzini | 2c9b15c | 2013-06-06 05:41:28 -0400 | [diff] [blame] | 2553 | memory_region_init_io(&io_mem_unassigned, NULL, &unassigned_mem_ops, NULL, |
Paolo Bonzini | 1f6245e | 2014-06-13 10:48:06 +0200 | [diff] [blame] | 2554 | NULL, UINT64_MAX); |
Jan Kiszka | 8d04fb5 | 2017-02-23 18:29:11 +0000 | [diff] [blame] | 2555 | |
| 2556 | /* io_mem_notdirty calls tb_invalidate_phys_page_fast, |
| 2557 | * which can be called without the iothread mutex. |
| 2558 | */ |
Paolo Bonzini | 2c9b15c | 2013-06-06 05:41:28 -0400 | [diff] [blame] | 2559 | memory_region_init_io(&io_mem_notdirty, NULL, ¬dirty_mem_ops, NULL, |
Paolo Bonzini | 1f6245e | 2014-06-13 10:48:06 +0200 | [diff] [blame] | 2560 | NULL, UINT64_MAX); |
Jan Kiszka | 8d04fb5 | 2017-02-23 18:29:11 +0000 | [diff] [blame] | 2561 | memory_region_clear_global_locking(&io_mem_notdirty); |
| 2562 | |
Paolo Bonzini | 2c9b15c | 2013-06-06 05:41:28 -0400 | [diff] [blame] | 2563 | memory_region_init_io(&io_mem_watch, NULL, &watch_mem_ops, NULL, |
Paolo Bonzini | 1f6245e | 2014-06-13 10:48:06 +0200 | [diff] [blame] | 2564 | NULL, UINT64_MAX); |
Avi Kivity | e9179ce | 2009-06-14 11:38:52 +0300 | [diff] [blame] | 2565 | } |
| 2566 | |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 2567 | static void mem_begin(MemoryListener *listener) |
| 2568 | { |
Paolo Bonzini | 89ae337 | 2013-06-02 10:39:07 +0200 | [diff] [blame] | 2569 | AddressSpace *as = container_of(listener, AddressSpace, dispatch_listener); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 2570 | AddressSpaceDispatch *d = g_new0(AddressSpaceDispatch, 1); |
| 2571 | uint16_t n; |
| 2572 | |
Peter Crosthwaite | a656e22 | 2014-06-02 19:08:44 -0700 | [diff] [blame] | 2573 | n = dummy_section(&d->map, as, &io_mem_unassigned); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 2574 | assert(n == PHYS_SECTION_UNASSIGNED); |
Peter Crosthwaite | a656e22 | 2014-06-02 19:08:44 -0700 | [diff] [blame] | 2575 | n = dummy_section(&d->map, as, &io_mem_notdirty); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 2576 | assert(n == PHYS_SECTION_NOTDIRTY); |
Peter Crosthwaite | a656e22 | 2014-06-02 19:08:44 -0700 | [diff] [blame] | 2577 | n = dummy_section(&d->map, as, &io_mem_rom); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 2578 | assert(n == PHYS_SECTION_ROM); |
Peter Crosthwaite | a656e22 | 2014-06-02 19:08:44 -0700 | [diff] [blame] | 2579 | n = dummy_section(&d->map, as, &io_mem_watch); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 2580 | assert(n == PHYS_SECTION_WATCH); |
Paolo Bonzini | 0075270 | 2013-05-29 12:13:54 +0200 | [diff] [blame] | 2581 | |
Michael S. Tsirkin | 9736e55 | 2013-11-11 14:42:43 +0200 | [diff] [blame] | 2582 | d->phys_map = (PhysPageEntry) { .ptr = PHYS_MAP_NODE_NIL, .skip = 1 }; |
Paolo Bonzini | 0075270 | 2013-05-29 12:13:54 +0200 | [diff] [blame] | 2583 | d->as = as; |
| 2584 | as->next_dispatch = d; |
| 2585 | } |
| 2586 | |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 2587 | static void address_space_dispatch_free(AddressSpaceDispatch *d) |
| 2588 | { |
| 2589 | phys_sections_free(&d->map); |
| 2590 | g_free(d); |
| 2591 | } |
| 2592 | |
Paolo Bonzini | 0075270 | 2013-05-29 12:13:54 +0200 | [diff] [blame] | 2593 | static void mem_commit(MemoryListener *listener) |
| 2594 | { |
| 2595 | AddressSpace *as = container_of(listener, AddressSpace, dispatch_listener); |
Paolo Bonzini | 0475d94 | 2013-05-29 12:28:21 +0200 | [diff] [blame] | 2596 | AddressSpaceDispatch *cur = as->dispatch; |
| 2597 | AddressSpaceDispatch *next = as->next_dispatch; |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 2598 | |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 2599 | phys_page_compact_all(next, next->map.nodes_nb); |
Michael S. Tsirkin | b35ba30 | 2013-11-11 17:52:07 +0200 | [diff] [blame] | 2600 | |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 2601 | atomic_rcu_set(&as->dispatch, next); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 2602 | if (cur) { |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 2603 | call_rcu(cur, address_space_dispatch_free, rcu); |
Marcel Apfelbaum | 53cb28c | 2013-12-01 14:02:23 +0200 | [diff] [blame] | 2604 | } |
Paolo Bonzini | 9affd6f | 2013-05-29 12:09:47 +0200 | [diff] [blame] | 2605 | } |
| 2606 | |
Avi Kivity | 1d71148 | 2012-10-02 18:54:45 +0200 | [diff] [blame] | 2607 | static void tcg_commit(MemoryListener *listener) |
Avi Kivity | 50c1e14 | 2012-02-08 21:36:02 +0200 | [diff] [blame] | 2608 | { |
Peter Maydell | 32857f4 | 2015-10-01 15:29:50 +0100 | [diff] [blame] | 2609 | CPUAddressSpace *cpuas; |
| 2610 | AddressSpaceDispatch *d; |
Avi Kivity | 117712c | 2012-02-12 21:23:17 +0200 | [diff] [blame] | 2611 | |
| 2612 | /* since each CPU stores ram addresses in its TLB cache, we must |
| 2613 | reset the modified entries */ |
Peter Maydell | 32857f4 | 2015-10-01 15:29:50 +0100 | [diff] [blame] | 2614 | cpuas = container_of(listener, CPUAddressSpace, tcg_as_listener); |
| 2615 | cpu_reloading_memory_map(); |
| 2616 | /* The CPU and TLB are protected by the iothread lock. |
| 2617 | * We reload the dispatch pointer now because cpu_reloading_memory_map() |
| 2618 | * may have split the RCU critical section. |
| 2619 | */ |
| 2620 | d = atomic_rcu_read(&cpuas->as->dispatch); |
Alex Bennée | f35e44e | 2016-10-21 16:34:18 +0100 | [diff] [blame] | 2621 | atomic_rcu_set(&cpuas->memory_dispatch, d); |
Alex Bennée | d10eb08 | 2016-11-14 14:17:28 +0000 | [diff] [blame] | 2622 | tlb_flush(cpuas->cpu); |
Avi Kivity | 50c1e14 | 2012-02-08 21:36:02 +0200 | [diff] [blame] | 2623 | } |
| 2624 | |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 2625 | void address_space_init_dispatch(AddressSpace *as) |
| 2626 | { |
Paolo Bonzini | 0075270 | 2013-05-29 12:13:54 +0200 | [diff] [blame] | 2627 | as->dispatch = NULL; |
Paolo Bonzini | 89ae337 | 2013-06-02 10:39:07 +0200 | [diff] [blame] | 2628 | as->dispatch_listener = (MemoryListener) { |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 2629 | .begin = mem_begin, |
Paolo Bonzini | 0075270 | 2013-05-29 12:13:54 +0200 | [diff] [blame] | 2630 | .commit = mem_commit, |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 2631 | .region_add = mem_add, |
| 2632 | .region_nop = mem_add, |
| 2633 | .priority = 0, |
| 2634 | }; |
Paolo Bonzini | 89ae337 | 2013-06-02 10:39:07 +0200 | [diff] [blame] | 2635 | memory_listener_register(&as->dispatch_listener, as); |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 2636 | } |
| 2637 | |
Paolo Bonzini | 6e48e8f | 2015-02-10 10:25:44 -0700 | [diff] [blame] | 2638 | void address_space_unregister(AddressSpace *as) |
| 2639 | { |
| 2640 | memory_listener_unregister(&as->dispatch_listener); |
| 2641 | } |
| 2642 | |
Avi Kivity | 83f3c25 | 2012-10-07 12:59:55 +0200 | [diff] [blame] | 2643 | void address_space_destroy_dispatch(AddressSpace *as) |
| 2644 | { |
| 2645 | AddressSpaceDispatch *d = as->dispatch; |
| 2646 | |
Paolo Bonzini | 79e2b9a | 2015-01-21 12:09:14 +0100 | [diff] [blame] | 2647 | atomic_rcu_set(&as->dispatch, NULL); |
| 2648 | if (d) { |
| 2649 | call_rcu(d, address_space_dispatch_free, rcu); |
| 2650 | } |
Avi Kivity | 83f3c25 | 2012-10-07 12:59:55 +0200 | [diff] [blame] | 2651 | } |
| 2652 | |
Avi Kivity | 62152b8 | 2011-07-26 14:26:14 +0300 | [diff] [blame] | 2653 | static void memory_map_init(void) |
| 2654 | { |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 2655 | system_memory = g_malloc(sizeof(*system_memory)); |
Paolo Bonzini | 03f4995 | 2013-11-07 17:14:36 +0100 | [diff] [blame] | 2656 | |
Paolo Bonzini | 57271d6 | 2013-11-07 17:14:37 +0100 | [diff] [blame] | 2657 | memory_region_init(system_memory, NULL, "system", UINT64_MAX); |
Alexey Kardashevskiy | 7dca804 | 2013-04-29 16:25:51 +0000 | [diff] [blame] | 2658 | address_space_init(&address_space_memory, system_memory, "memory"); |
Avi Kivity | 309cb47 | 2011-08-08 16:09:03 +0300 | [diff] [blame] | 2659 | |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 2660 | system_io = g_malloc(sizeof(*system_io)); |
Jan Kiszka | 3bb28b7 | 2013-09-02 18:43:30 +0200 | [diff] [blame] | 2661 | memory_region_init_io(system_io, NULL, &unassigned_io_ops, NULL, "io", |
| 2662 | 65536); |
Alexey Kardashevskiy | 7dca804 | 2013-04-29 16:25:51 +0000 | [diff] [blame] | 2663 | address_space_init(&address_space_io, system_io, "I/O"); |
Avi Kivity | 62152b8 | 2011-07-26 14:26:14 +0300 | [diff] [blame] | 2664 | } |
| 2665 | |
| 2666 | MemoryRegion *get_system_memory(void) |
| 2667 | { |
| 2668 | return system_memory; |
| 2669 | } |
| 2670 | |
Avi Kivity | 309cb47 | 2011-08-08 16:09:03 +0300 | [diff] [blame] | 2671 | MemoryRegion *get_system_io(void) |
| 2672 | { |
| 2673 | return system_io; |
| 2674 | } |
| 2675 | |
pbrook | e2eef17 | 2008-06-08 01:09:01 +0000 | [diff] [blame] | 2676 | #endif /* !defined(CONFIG_USER_ONLY) */ |
| 2677 | |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2678 | /* physical memory access (slow version, mainly for debug) */ |
| 2679 | #if defined(CONFIG_USER_ONLY) |
Andreas Färber | f17ec44 | 2013-06-29 19:40:58 +0200 | [diff] [blame] | 2680 | int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr, |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 2681 | uint8_t *buf, int len, int is_write) |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2682 | { |
| 2683 | int l, flags; |
| 2684 | target_ulong page; |
pbrook | 53a5960 | 2006-03-25 19:31:22 +0000 | [diff] [blame] | 2685 | void * p; |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2686 | |
| 2687 | while (len > 0) { |
| 2688 | page = addr & TARGET_PAGE_MASK; |
| 2689 | l = (page + TARGET_PAGE_SIZE) - addr; |
| 2690 | if (l > len) |
| 2691 | l = len; |
| 2692 | flags = page_get_flags(page); |
| 2693 | if (!(flags & PAGE_VALID)) |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 2694 | return -1; |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2695 | if (is_write) { |
| 2696 | if (!(flags & PAGE_WRITE)) |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 2697 | return -1; |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 2698 | /* XXX: this code should not depend on lock_user */ |
aurel32 | 72fb7da | 2008-04-27 23:53:45 +0000 | [diff] [blame] | 2699 | if (!(p = lock_user(VERIFY_WRITE, addr, l, 0))) |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 2700 | return -1; |
aurel32 | 72fb7da | 2008-04-27 23:53:45 +0000 | [diff] [blame] | 2701 | memcpy(p, buf, l); |
| 2702 | unlock_user(p, addr, l); |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2703 | } else { |
| 2704 | if (!(flags & PAGE_READ)) |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 2705 | return -1; |
bellard | 579a97f | 2007-11-11 14:26:47 +0000 | [diff] [blame] | 2706 | /* XXX: this code should not depend on lock_user */ |
aurel32 | 72fb7da | 2008-04-27 23:53:45 +0000 | [diff] [blame] | 2707 | if (!(p = lock_user(VERIFY_READ, addr, l, 1))) |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 2708 | return -1; |
aurel32 | 72fb7da | 2008-04-27 23:53:45 +0000 | [diff] [blame] | 2709 | memcpy(buf, p, l); |
aurel32 | 5b25757 | 2008-04-28 08:54:59 +0000 | [diff] [blame] | 2710 | unlock_user(p, addr, 0); |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2711 | } |
| 2712 | len -= l; |
| 2713 | buf += l; |
| 2714 | addr += l; |
| 2715 | } |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 2716 | return 0; |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2717 | } |
bellard | 8df1cd0 | 2005-01-28 22:37:22 +0000 | [diff] [blame] | 2718 | |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2719 | #else |
Anthony PERARD | 51d7a9e | 2012-10-03 13:49:05 +0000 | [diff] [blame] | 2720 | |
Paolo Bonzini | 845b621 | 2015-03-23 11:45:53 +0100 | [diff] [blame] | 2721 | static void invalidate_and_set_dirty(MemoryRegion *mr, hwaddr addr, |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 2722 | hwaddr length) |
Anthony PERARD | 51d7a9e | 2012-10-03 13:49:05 +0000 | [diff] [blame] | 2723 | { |
Paolo Bonzini | e87f777 | 2015-03-25 15:21:39 +0100 | [diff] [blame] | 2724 | uint8_t dirty_log_mask = memory_region_get_dirty_log_mask(mr); |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2725 | addr += memory_region_get_ram_addr(mr); |
| 2726 | |
Paolo Bonzini | e87f777 | 2015-03-25 15:21:39 +0100 | [diff] [blame] | 2727 | /* No early return if dirty_log_mask is or becomes 0, because |
| 2728 | * cpu_physical_memory_set_dirty_range will still call |
| 2729 | * xen_modified_memory. |
| 2730 | */ |
| 2731 | if (dirty_log_mask) { |
| 2732 | dirty_log_mask = |
| 2733 | cpu_physical_memory_range_includes_clean(addr, length, dirty_log_mask); |
Anthony PERARD | 51d7a9e | 2012-10-03 13:49:05 +0000 | [diff] [blame] | 2734 | } |
Paolo Bonzini | e87f777 | 2015-03-25 15:21:39 +0100 | [diff] [blame] | 2735 | if (dirty_log_mask & (1 << DIRTY_MEMORY_CODE)) { |
Alex Bennée | ba051fb | 2016-10-27 16:10:16 +0100 | [diff] [blame] | 2736 | tb_lock(); |
Paolo Bonzini | e87f777 | 2015-03-25 15:21:39 +0100 | [diff] [blame] | 2737 | tb_invalidate_phys_range(addr, addr + length); |
Alex Bennée | ba051fb | 2016-10-27 16:10:16 +0100 | [diff] [blame] | 2738 | tb_unlock(); |
Paolo Bonzini | e87f777 | 2015-03-25 15:21:39 +0100 | [diff] [blame] | 2739 | dirty_log_mask &= ~(1 << DIRTY_MEMORY_CODE); |
| 2740 | } |
| 2741 | cpu_physical_memory_set_dirty_range(addr, length, dirty_log_mask); |
Anthony PERARD | 51d7a9e | 2012-10-03 13:49:05 +0000 | [diff] [blame] | 2742 | } |
| 2743 | |
Richard Henderson | 2332616 | 2013-07-08 14:55:59 -0700 | [diff] [blame] | 2744 | static int memory_access_size(MemoryRegion *mr, unsigned l, hwaddr addr) |
Paolo Bonzini | 82f2563 | 2013-05-24 11:59:43 +0200 | [diff] [blame] | 2745 | { |
Paolo Bonzini | e1622f4 | 2013-07-17 13:17:41 +0200 | [diff] [blame] | 2746 | unsigned access_size_max = mr->ops->valid.max_access_size; |
Richard Henderson | 2332616 | 2013-07-08 14:55:59 -0700 | [diff] [blame] | 2747 | |
| 2748 | /* Regions are assumed to support 1-4 byte accesses unless |
| 2749 | otherwise specified. */ |
Richard Henderson | 2332616 | 2013-07-08 14:55:59 -0700 | [diff] [blame] | 2750 | if (access_size_max == 0) { |
| 2751 | access_size_max = 4; |
Paolo Bonzini | 82f2563 | 2013-05-24 11:59:43 +0200 | [diff] [blame] | 2752 | } |
Richard Henderson | 2332616 | 2013-07-08 14:55:59 -0700 | [diff] [blame] | 2753 | |
| 2754 | /* Bound the maximum access by the alignment of the address. */ |
| 2755 | if (!mr->ops->impl.unaligned) { |
| 2756 | unsigned align_size_max = addr & -addr; |
| 2757 | if (align_size_max != 0 && align_size_max < access_size_max) { |
| 2758 | access_size_max = align_size_max; |
| 2759 | } |
| 2760 | } |
| 2761 | |
| 2762 | /* Don't attempt accesses larger than the maximum. */ |
| 2763 | if (l > access_size_max) { |
| 2764 | l = access_size_max; |
| 2765 | } |
Peter Maydell | 6554f5c | 2015-07-24 13:33:10 +0100 | [diff] [blame] | 2766 | l = pow2floor(l); |
Richard Henderson | 2332616 | 2013-07-08 14:55:59 -0700 | [diff] [blame] | 2767 | |
| 2768 | return l; |
Paolo Bonzini | 82f2563 | 2013-05-24 11:59:43 +0200 | [diff] [blame] | 2769 | } |
| 2770 | |
Jan Kiszka | 4840f10 | 2015-06-18 18:47:22 +0200 | [diff] [blame] | 2771 | static bool prepare_mmio_access(MemoryRegion *mr) |
Paolo Bonzini | 125b380 | 2015-06-18 18:47:21 +0200 | [diff] [blame] | 2772 | { |
Jan Kiszka | 4840f10 | 2015-06-18 18:47:22 +0200 | [diff] [blame] | 2773 | bool unlocked = !qemu_mutex_iothread_locked(); |
| 2774 | bool release_lock = false; |
| 2775 | |
| 2776 | if (unlocked && mr->global_locking) { |
| 2777 | qemu_mutex_lock_iothread(); |
| 2778 | unlocked = false; |
| 2779 | release_lock = true; |
Paolo Bonzini | 125b380 | 2015-06-18 18:47:21 +0200 | [diff] [blame] | 2780 | } |
Jan Kiszka | 4840f10 | 2015-06-18 18:47:22 +0200 | [diff] [blame] | 2781 | if (mr->flush_coalesced_mmio) { |
| 2782 | if (unlocked) { |
| 2783 | qemu_mutex_lock_iothread(); |
| 2784 | } |
| 2785 | qemu_flush_coalesced_mmio_buffer(); |
| 2786 | if (unlocked) { |
| 2787 | qemu_mutex_unlock_iothread(); |
| 2788 | } |
| 2789 | } |
| 2790 | |
| 2791 | return release_lock; |
Paolo Bonzini | 125b380 | 2015-06-18 18:47:21 +0200 | [diff] [blame] | 2792 | } |
| 2793 | |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 2794 | /* Called within RCU critical section. */ |
| 2795 | static MemTxResult address_space_write_continue(AddressSpace *as, hwaddr addr, |
| 2796 | MemTxAttrs attrs, |
| 2797 | const uint8_t *buf, |
| 2798 | int len, hwaddr addr1, |
| 2799 | hwaddr l, MemoryRegion *mr) |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2800 | { |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2801 | uint8_t *ptr; |
Paolo Bonzini | 791af8c | 2013-05-24 16:10:39 +0200 | [diff] [blame] | 2802 | uint64_t val; |
Peter Maydell | 3b64349 | 2015-04-26 16:49:23 +0100 | [diff] [blame] | 2803 | MemTxResult result = MEMTX_OK; |
Jan Kiszka | 4840f10 | 2015-06-18 18:47:22 +0200 | [diff] [blame] | 2804 | bool release_lock = false; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 2805 | |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 2806 | for (;;) { |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 2807 | if (!memory_access_is_direct(mr, true)) { |
| 2808 | release_lock |= prepare_mmio_access(mr); |
| 2809 | l = memory_access_size(mr, l, addr1); |
| 2810 | /* XXX: could force current_cpu to NULL to avoid |
| 2811 | potential bugs */ |
| 2812 | switch (l) { |
| 2813 | case 8: |
| 2814 | /* 64 bit write access */ |
| 2815 | val = ldq_p(buf); |
| 2816 | result |= memory_region_dispatch_write(mr, addr1, val, 8, |
| 2817 | attrs); |
| 2818 | break; |
| 2819 | case 4: |
| 2820 | /* 32 bit write access */ |
Ladi Prosek | 6da67de | 2017-01-26 15:22:37 +0100 | [diff] [blame] | 2821 | val = (uint32_t)ldl_p(buf); |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 2822 | result |= memory_region_dispatch_write(mr, addr1, val, 4, |
| 2823 | attrs); |
| 2824 | break; |
| 2825 | case 2: |
| 2826 | /* 16 bit write access */ |
| 2827 | val = lduw_p(buf); |
| 2828 | result |= memory_region_dispatch_write(mr, addr1, val, 2, |
| 2829 | attrs); |
| 2830 | break; |
| 2831 | case 1: |
| 2832 | /* 8 bit write access */ |
| 2833 | val = ldub_p(buf); |
| 2834 | result |= memory_region_dispatch_write(mr, addr1, val, 1, |
| 2835 | attrs); |
| 2836 | break; |
| 2837 | default: |
| 2838 | abort(); |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2839 | } |
| 2840 | } else { |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 2841 | /* RAM case */ |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2842 | ptr = qemu_map_ram_ptr(mr->ram_block, addr1); |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 2843 | memcpy(ptr, buf, l); |
| 2844 | invalidate_and_set_dirty(mr, addr1, l); |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2845 | } |
Jan Kiszka | 4840f10 | 2015-06-18 18:47:22 +0200 | [diff] [blame] | 2846 | |
| 2847 | if (release_lock) { |
| 2848 | qemu_mutex_unlock_iothread(); |
| 2849 | release_lock = false; |
| 2850 | } |
| 2851 | |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2852 | len -= l; |
| 2853 | buf += l; |
| 2854 | addr += l; |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 2855 | |
| 2856 | if (!len) { |
| 2857 | break; |
| 2858 | } |
| 2859 | |
| 2860 | l = len; |
| 2861 | mr = address_space_translate(as, addr, &addr1, &l, true); |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2862 | } |
Paolo Bonzini | fd8aaa7 | 2013-05-21 09:56:55 +0200 | [diff] [blame] | 2863 | |
Peter Maydell | 3b64349 | 2015-04-26 16:49:23 +0100 | [diff] [blame] | 2864 | return result; |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 2865 | } |
bellard | 8df1cd0 | 2005-01-28 22:37:22 +0000 | [diff] [blame] | 2866 | |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 2867 | MemTxResult address_space_write(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, |
| 2868 | const uint8_t *buf, int len) |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 2869 | { |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 2870 | hwaddr l; |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 2871 | hwaddr addr1; |
| 2872 | MemoryRegion *mr; |
| 2873 | MemTxResult result = MEMTX_OK; |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 2874 | |
| 2875 | if (len > 0) { |
| 2876 | rcu_read_lock(); |
| 2877 | l = len; |
| 2878 | mr = address_space_translate(as, addr, &addr1, &l, true); |
| 2879 | result = address_space_write_continue(as, addr, attrs, buf, len, |
| 2880 | addr1, l, mr); |
| 2881 | rcu_read_unlock(); |
| 2882 | } |
| 2883 | |
| 2884 | return result; |
| 2885 | } |
| 2886 | |
| 2887 | /* Called within RCU critical section. */ |
| 2888 | MemTxResult address_space_read_continue(AddressSpace *as, hwaddr addr, |
| 2889 | MemTxAttrs attrs, uint8_t *buf, |
| 2890 | int len, hwaddr addr1, hwaddr l, |
| 2891 | MemoryRegion *mr) |
| 2892 | { |
| 2893 | uint8_t *ptr; |
| 2894 | uint64_t val; |
| 2895 | MemTxResult result = MEMTX_OK; |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 2896 | bool release_lock = false; |
| 2897 | |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 2898 | for (;;) { |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 2899 | if (!memory_access_is_direct(mr, false)) { |
| 2900 | /* I/O case */ |
| 2901 | release_lock |= prepare_mmio_access(mr); |
| 2902 | l = memory_access_size(mr, l, addr1); |
| 2903 | switch (l) { |
| 2904 | case 8: |
| 2905 | /* 64 bit read access */ |
| 2906 | result |= memory_region_dispatch_read(mr, addr1, &val, 8, |
| 2907 | attrs); |
| 2908 | stq_p(buf, val); |
| 2909 | break; |
| 2910 | case 4: |
| 2911 | /* 32 bit read access */ |
| 2912 | result |= memory_region_dispatch_read(mr, addr1, &val, 4, |
| 2913 | attrs); |
| 2914 | stl_p(buf, val); |
| 2915 | break; |
| 2916 | case 2: |
| 2917 | /* 16 bit read access */ |
| 2918 | result |= memory_region_dispatch_read(mr, addr1, &val, 2, |
| 2919 | attrs); |
| 2920 | stw_p(buf, val); |
| 2921 | break; |
| 2922 | case 1: |
| 2923 | /* 8 bit read access */ |
| 2924 | result |= memory_region_dispatch_read(mr, addr1, &val, 1, |
| 2925 | attrs); |
| 2926 | stb_p(buf, val); |
| 2927 | break; |
| 2928 | default: |
| 2929 | abort(); |
| 2930 | } |
| 2931 | } else { |
| 2932 | /* RAM case */ |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 2933 | ptr = qemu_map_ram_ptr(mr->ram_block, addr1); |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 2934 | memcpy(buf, ptr, l); |
| 2935 | } |
| 2936 | |
| 2937 | if (release_lock) { |
| 2938 | qemu_mutex_unlock_iothread(); |
| 2939 | release_lock = false; |
| 2940 | } |
| 2941 | |
| 2942 | len -= l; |
| 2943 | buf += l; |
| 2944 | addr += l; |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 2945 | |
| 2946 | if (!len) { |
| 2947 | break; |
| 2948 | } |
| 2949 | |
| 2950 | l = len; |
| 2951 | mr = address_space_translate(as, addr, &addr1, &l, false); |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 2952 | } |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 2953 | |
| 2954 | return result; |
| 2955 | } |
| 2956 | |
Paolo Bonzini | 3cc8f88 | 2015-12-09 10:34:13 +0100 | [diff] [blame] | 2957 | MemTxResult address_space_read_full(AddressSpace *as, hwaddr addr, |
| 2958 | MemTxAttrs attrs, uint8_t *buf, int len) |
Paolo Bonzini | a203ac7 | 2015-12-09 10:18:57 +0100 | [diff] [blame] | 2959 | { |
| 2960 | hwaddr l; |
| 2961 | hwaddr addr1; |
| 2962 | MemoryRegion *mr; |
| 2963 | MemTxResult result = MEMTX_OK; |
| 2964 | |
| 2965 | if (len > 0) { |
| 2966 | rcu_read_lock(); |
| 2967 | l = len; |
| 2968 | mr = address_space_translate(as, addr, &addr1, &l, false); |
| 2969 | result = address_space_read_continue(as, addr, attrs, buf, len, |
| 2970 | addr1, l, mr); |
| 2971 | rcu_read_unlock(); |
| 2972 | } |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 2973 | |
| 2974 | return result; |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 2975 | } |
| 2976 | |
Paolo Bonzini | eb7eeb8 | 2015-12-09 10:06:31 +0100 | [diff] [blame] | 2977 | MemTxResult address_space_rw(AddressSpace *as, hwaddr addr, MemTxAttrs attrs, |
| 2978 | uint8_t *buf, int len, bool is_write) |
| 2979 | { |
| 2980 | if (is_write) { |
| 2981 | return address_space_write(as, addr, attrs, (uint8_t *)buf, len); |
| 2982 | } else { |
| 2983 | return address_space_read(as, addr, attrs, (uint8_t *)buf, len); |
| 2984 | } |
| 2985 | } |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 2986 | |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 2987 | void cpu_physical_memory_rw(hwaddr addr, uint8_t *buf, |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 2988 | int len, int is_write) |
| 2989 | { |
Peter Maydell | 5c9eb02 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 2990 | address_space_rw(&address_space_memory, addr, MEMTXATTRS_UNSPECIFIED, |
| 2991 | buf, len, is_write); |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 2992 | } |
| 2993 | |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 2994 | enum write_rom_type { |
| 2995 | WRITE_DATA, |
| 2996 | FLUSH_CACHE, |
| 2997 | }; |
| 2998 | |
Edgar E. Iglesias | 2a22165 | 2013-12-13 16:28:52 +1000 | [diff] [blame] | 2999 | static inline void cpu_physical_memory_write_rom_internal(AddressSpace *as, |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3000 | hwaddr addr, const uint8_t *buf, int len, enum write_rom_type type) |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3001 | { |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 3002 | hwaddr l; |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3003 | uint8_t *ptr; |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 3004 | hwaddr addr1; |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 3005 | MemoryRegion *mr; |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 3006 | |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3007 | rcu_read_lock(); |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3008 | while (len > 0) { |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 3009 | l = len; |
Edgar E. Iglesias | 2a22165 | 2013-12-13 16:28:52 +1000 | [diff] [blame] | 3010 | mr = address_space_translate(as, addr, &addr1, &l, true); |
ths | 3b46e62 | 2007-09-17 08:09:54 +0000 | [diff] [blame] | 3011 | |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 3012 | if (!(memory_region_is_ram(mr) || |
| 3013 | memory_region_is_romd(mr))) { |
Paolo Bonzini | b242e0e | 2015-07-04 00:24:51 +0200 | [diff] [blame] | 3014 | l = memory_access_size(mr, l, addr1); |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3015 | } else { |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3016 | /* ROM/RAM case */ |
Paolo Bonzini | 0878d0e | 2016-02-22 11:02:12 +0100 | [diff] [blame] | 3017 | ptr = qemu_map_ram_ptr(mr->ram_block, addr1); |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3018 | switch (type) { |
| 3019 | case WRITE_DATA: |
| 3020 | memcpy(ptr, buf, l); |
Paolo Bonzini | 845b621 | 2015-03-23 11:45:53 +0100 | [diff] [blame] | 3021 | invalidate_and_set_dirty(mr, addr1, l); |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3022 | break; |
| 3023 | case FLUSH_CACHE: |
| 3024 | flush_icache_range((uintptr_t)ptr, (uintptr_t)ptr + l); |
| 3025 | break; |
| 3026 | } |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3027 | } |
| 3028 | len -= l; |
| 3029 | buf += l; |
| 3030 | addr += l; |
| 3031 | } |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3032 | rcu_read_unlock(); |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3033 | } |
| 3034 | |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3035 | /* used for ROM loading : can write in RAM and ROM */ |
Edgar E. Iglesias | 2a22165 | 2013-12-13 16:28:52 +1000 | [diff] [blame] | 3036 | void cpu_physical_memory_write_rom(AddressSpace *as, hwaddr addr, |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3037 | const uint8_t *buf, int len) |
| 3038 | { |
Edgar E. Iglesias | 2a22165 | 2013-12-13 16:28:52 +1000 | [diff] [blame] | 3039 | cpu_physical_memory_write_rom_internal(as, addr, buf, len, WRITE_DATA); |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3040 | } |
| 3041 | |
| 3042 | void cpu_flush_icache_range(hwaddr start, int len) |
| 3043 | { |
| 3044 | /* |
| 3045 | * This function should do the same thing as an icache flush that was |
| 3046 | * triggered from within the guest. For TCG we are always cache coherent, |
| 3047 | * so there is no need to flush anything. For KVM / Xen we need to flush |
| 3048 | * the host's instruction cache at least. |
| 3049 | */ |
| 3050 | if (tcg_enabled()) { |
| 3051 | return; |
| 3052 | } |
| 3053 | |
Edgar E. Iglesias | 2a22165 | 2013-12-13 16:28:52 +1000 | [diff] [blame] | 3054 | cpu_physical_memory_write_rom_internal(&address_space_memory, |
| 3055 | start, NULL, len, FLUSH_CACHE); |
Alexander Graf | 582b55a | 2013-12-11 14:17:44 +0100 | [diff] [blame] | 3056 | } |
| 3057 | |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3058 | typedef struct { |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3059 | MemoryRegion *mr; |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3060 | void *buffer; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3061 | hwaddr addr; |
| 3062 | hwaddr len; |
Fam Zheng | c2cba0f | 2015-03-16 17:03:33 +0800 | [diff] [blame] | 3063 | bool in_use; |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3064 | } BounceBuffer; |
| 3065 | |
| 3066 | static BounceBuffer bounce; |
| 3067 | |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3068 | typedef struct MapClient { |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3069 | QEMUBH *bh; |
Blue Swirl | 72cf2d4 | 2009-09-12 07:36:22 +0000 | [diff] [blame] | 3070 | QLIST_ENTRY(MapClient) link; |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3071 | } MapClient; |
| 3072 | |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3073 | QemuMutex map_client_list_lock; |
Blue Swirl | 72cf2d4 | 2009-09-12 07:36:22 +0000 | [diff] [blame] | 3074 | static QLIST_HEAD(map_client_list, MapClient) map_client_list |
| 3075 | = QLIST_HEAD_INITIALIZER(map_client_list); |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3076 | |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3077 | static void cpu_unregister_map_client_do(MapClient *client) |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3078 | { |
Blue Swirl | 72cf2d4 | 2009-09-12 07:36:22 +0000 | [diff] [blame] | 3079 | QLIST_REMOVE(client, link); |
Anthony Liguori | 7267c09 | 2011-08-20 22:09:37 -0500 | [diff] [blame] | 3080 | g_free(client); |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3081 | } |
| 3082 | |
Fam Zheng | 33b6c2e | 2015-03-16 17:03:36 +0800 | [diff] [blame] | 3083 | static void cpu_notify_map_clients_locked(void) |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3084 | { |
| 3085 | MapClient *client; |
| 3086 | |
Blue Swirl | 72cf2d4 | 2009-09-12 07:36:22 +0000 | [diff] [blame] | 3087 | while (!QLIST_EMPTY(&map_client_list)) { |
| 3088 | client = QLIST_FIRST(&map_client_list); |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3089 | qemu_bh_schedule(client->bh); |
| 3090 | cpu_unregister_map_client_do(client); |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3091 | } |
| 3092 | } |
| 3093 | |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3094 | void cpu_register_map_client(QEMUBH *bh) |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3095 | { |
| 3096 | MapClient *client = g_malloc(sizeof(*client)); |
| 3097 | |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3098 | qemu_mutex_lock(&map_client_list_lock); |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3099 | client->bh = bh; |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3100 | QLIST_INSERT_HEAD(&map_client_list, client, link); |
Fam Zheng | 33b6c2e | 2015-03-16 17:03:36 +0800 | [diff] [blame] | 3101 | if (!atomic_read(&bounce.in_use)) { |
| 3102 | cpu_notify_map_clients_locked(); |
| 3103 | } |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3104 | qemu_mutex_unlock(&map_client_list_lock); |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3105 | } |
| 3106 | |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3107 | void cpu_exec_init_all(void) |
| 3108 | { |
| 3109 | qemu_mutex_init(&ram_list.mutex); |
Peter Maydell | 20bccb8 | 2016-10-24 16:26:49 +0100 | [diff] [blame] | 3110 | /* The data structures we set up here depend on knowing the page size, |
| 3111 | * so no more changes can be made after this point. |
| 3112 | * In an ideal world, nothing we did before we had finished the |
| 3113 | * machine setup would care about the target page size, and we could |
| 3114 | * do this much later, rather than requiring board models to state |
| 3115 | * up front what their requirements are. |
| 3116 | */ |
| 3117 | finalize_target_page_bits(); |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3118 | io_mem_init(); |
Paolo Bonzini | 680a478 | 2015-11-02 09:23:52 +0100 | [diff] [blame] | 3119 | memory_map_init(); |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3120 | qemu_mutex_init(&map_client_list_lock); |
| 3121 | } |
| 3122 | |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3123 | void cpu_unregister_map_client(QEMUBH *bh) |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3124 | { |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3125 | MapClient *client; |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3126 | |
Fam Zheng | e95205e | 2015-03-16 17:03:37 +0800 | [diff] [blame] | 3127 | qemu_mutex_lock(&map_client_list_lock); |
| 3128 | QLIST_FOREACH(client, &map_client_list, link) { |
| 3129 | if (client->bh == bh) { |
| 3130 | cpu_unregister_map_client_do(client); |
| 3131 | break; |
| 3132 | } |
| 3133 | } |
| 3134 | qemu_mutex_unlock(&map_client_list_lock); |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3135 | } |
| 3136 | |
| 3137 | static void cpu_notify_map_clients(void) |
| 3138 | { |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3139 | qemu_mutex_lock(&map_client_list_lock); |
Fam Zheng | 33b6c2e | 2015-03-16 17:03:36 +0800 | [diff] [blame] | 3140 | cpu_notify_map_clients_locked(); |
Fam Zheng | 38e047b | 2015-03-16 17:03:35 +0800 | [diff] [blame] | 3141 | qemu_mutex_unlock(&map_client_list_lock); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3142 | } |
| 3143 | |
Paolo Bonzini | 51644ab | 2013-04-11 15:40:59 +0200 | [diff] [blame] | 3144 | bool address_space_access_valid(AddressSpace *as, hwaddr addr, int len, bool is_write) |
| 3145 | { |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 3146 | MemoryRegion *mr; |
Paolo Bonzini | 51644ab | 2013-04-11 15:40:59 +0200 | [diff] [blame] | 3147 | hwaddr l, xlat; |
| 3148 | |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3149 | rcu_read_lock(); |
Paolo Bonzini | 51644ab | 2013-04-11 15:40:59 +0200 | [diff] [blame] | 3150 | while (len > 0) { |
| 3151 | l = len; |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 3152 | mr = address_space_translate(as, addr, &xlat, &l, is_write); |
| 3153 | if (!memory_access_is_direct(mr, is_write)) { |
| 3154 | l = memory_access_size(mr, l, addr); |
| 3155 | if (!memory_region_access_valid(mr, xlat, l, is_write)) { |
Roman Kapl | 5ad4a2b | 2017-01-09 12:09:21 +0100 | [diff] [blame] | 3156 | rcu_read_unlock(); |
Paolo Bonzini | 51644ab | 2013-04-11 15:40:59 +0200 | [diff] [blame] | 3157 | return false; |
| 3158 | } |
| 3159 | } |
| 3160 | |
| 3161 | len -= l; |
| 3162 | addr += l; |
| 3163 | } |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3164 | rcu_read_unlock(); |
Paolo Bonzini | 51644ab | 2013-04-11 15:40:59 +0200 | [diff] [blame] | 3165 | return true; |
| 3166 | } |
| 3167 | |
Paolo Bonzini | 715c31e | 2016-11-22 12:04:31 +0100 | [diff] [blame] | 3168 | static hwaddr |
| 3169 | address_space_extend_translation(AddressSpace *as, hwaddr addr, hwaddr target_len, |
| 3170 | MemoryRegion *mr, hwaddr base, hwaddr len, |
| 3171 | bool is_write) |
| 3172 | { |
| 3173 | hwaddr done = 0; |
| 3174 | hwaddr xlat; |
| 3175 | MemoryRegion *this_mr; |
| 3176 | |
| 3177 | for (;;) { |
| 3178 | target_len -= len; |
| 3179 | addr += len; |
| 3180 | done += len; |
| 3181 | if (target_len == 0) { |
| 3182 | return done; |
| 3183 | } |
| 3184 | |
| 3185 | len = target_len; |
| 3186 | this_mr = address_space_translate(as, addr, &xlat, &len, is_write); |
| 3187 | if (this_mr != mr || xlat != base + done) { |
| 3188 | return done; |
| 3189 | } |
| 3190 | } |
| 3191 | } |
| 3192 | |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3193 | /* Map a physical memory region into a host virtual address. |
| 3194 | * May map a subset of the requested range, given by and returned in *plen. |
| 3195 | * May return NULL if resources needed to perform the mapping are exhausted. |
| 3196 | * Use only for reads OR writes - not for read-modify-write operations. |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3197 | * Use cpu_register_map_client() to know when retrying the map operation is |
| 3198 | * likely to succeed. |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3199 | */ |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3200 | void *address_space_map(AddressSpace *as, |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3201 | hwaddr addr, |
| 3202 | hwaddr *plen, |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3203 | bool is_write) |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3204 | { |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3205 | hwaddr len = *plen; |
Paolo Bonzini | 715c31e | 2016-11-22 12:04:31 +0100 | [diff] [blame] | 3206 | hwaddr l, xlat; |
| 3207 | MemoryRegion *mr; |
Paolo Bonzini | e81bcda | 2015-12-16 10:31:26 +0100 | [diff] [blame] | 3208 | void *ptr; |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3209 | |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3210 | if (len == 0) { |
| 3211 | return NULL; |
| 3212 | } |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3213 | |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3214 | l = len; |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3215 | rcu_read_lock(); |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3216 | mr = address_space_translate(as, addr, &xlat, &l, is_write); |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3217 | |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3218 | if (!memory_access_is_direct(mr, is_write)) { |
Fam Zheng | c2cba0f | 2015-03-16 17:03:33 +0800 | [diff] [blame] | 3219 | if (atomic_xchg(&bounce.in_use, true)) { |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3220 | rcu_read_unlock(); |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3221 | return NULL; |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3222 | } |
Kevin Wolf | e85d9db | 2013-07-22 14:30:23 +0200 | [diff] [blame] | 3223 | /* Avoid unbounded allocations */ |
| 3224 | l = MIN(l, TARGET_PAGE_SIZE); |
| 3225 | bounce.buffer = qemu_memalign(TARGET_PAGE_SIZE, l); |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3226 | bounce.addr = addr; |
| 3227 | bounce.len = l; |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3228 | |
| 3229 | memory_region_ref(mr); |
| 3230 | bounce.mr = mr; |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3231 | if (!is_write) { |
Peter Maydell | 5c9eb02 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3232 | address_space_read(as, addr, MEMTXATTRS_UNSPECIFIED, |
| 3233 | bounce.buffer, l); |
Stefano Stabellini | 8ab934f | 2011-06-27 18:26:06 +0100 | [diff] [blame] | 3234 | } |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3235 | |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3236 | rcu_read_unlock(); |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3237 | *plen = l; |
| 3238 | return bounce.buffer; |
| 3239 | } |
| 3240 | |
Paolo Bonzini | e3127ae | 2013-06-28 17:29:27 +0200 | [diff] [blame] | 3241 | |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3242 | memory_region_ref(mr); |
Paolo Bonzini | 715c31e | 2016-11-22 12:04:31 +0100 | [diff] [blame] | 3243 | *plen = address_space_extend_translation(as, addr, len, mr, xlat, l, is_write); |
| 3244 | ptr = qemu_ram_ptr_length(mr->ram_block, xlat, plen); |
Paolo Bonzini | e81bcda | 2015-12-16 10:31:26 +0100 | [diff] [blame] | 3245 | rcu_read_unlock(); |
| 3246 | |
| 3247 | return ptr; |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3248 | } |
| 3249 | |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3250 | /* Unmaps a memory region previously mapped by address_space_map(). |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3251 | * Will also mark the memory as dirty if is_write == 1. access_len gives |
| 3252 | * the amount of memory that was actually read or written by the caller. |
| 3253 | */ |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3254 | void address_space_unmap(AddressSpace *as, void *buffer, hwaddr len, |
| 3255 | int is_write, hwaddr access_len) |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3256 | { |
| 3257 | if (buffer != bounce.buffer) { |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3258 | MemoryRegion *mr; |
| 3259 | ram_addr_t addr1; |
| 3260 | |
Paolo Bonzini | 07bdaa4 | 2016-03-25 12:55:08 +0100 | [diff] [blame] | 3261 | mr = memory_region_from_host(buffer, &addr1); |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3262 | assert(mr != NULL); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3263 | if (is_write) { |
Paolo Bonzini | 845b621 | 2015-03-23 11:45:53 +0100 | [diff] [blame] | 3264 | invalidate_and_set_dirty(mr, addr1, access_len); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3265 | } |
Jan Kiszka | 868bb33 | 2011-06-21 22:59:09 +0200 | [diff] [blame] | 3266 | if (xen_enabled()) { |
Jan Kiszka | e41d7c6 | 2011-06-21 22:59:08 +0200 | [diff] [blame] | 3267 | xen_invalidate_map_cache_entry(buffer); |
Anthony PERARD | 050a0dd | 2010-09-16 13:57:49 +0100 | [diff] [blame] | 3268 | } |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3269 | memory_region_unref(mr); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3270 | return; |
| 3271 | } |
| 3272 | if (is_write) { |
Peter Maydell | 5c9eb02 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3273 | address_space_write(as, bounce.addr, MEMTXATTRS_UNSPECIFIED, |
| 3274 | bounce.buffer, access_len); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3275 | } |
Herve Poussineau | f8a8324 | 2010-01-24 21:23:56 +0000 | [diff] [blame] | 3276 | qemu_vfree(bounce.buffer); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3277 | bounce.buffer = NULL; |
Paolo Bonzini | d3e7155 | 2013-06-28 17:33:29 +0200 | [diff] [blame] | 3278 | memory_region_unref(bounce.mr); |
Fam Zheng | c2cba0f | 2015-03-16 17:03:33 +0800 | [diff] [blame] | 3279 | atomic_mb_set(&bounce.in_use, false); |
aliguori | ba223c2 | 2009-01-22 16:59:16 +0000 | [diff] [blame] | 3280 | cpu_notify_map_clients(); |
aliguori | 6d16c2f | 2009-01-22 16:59:11 +0000 | [diff] [blame] | 3281 | } |
bellard | d0ecd2a | 2006-04-23 17:14:48 +0000 | [diff] [blame] | 3282 | |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3283 | void *cpu_physical_memory_map(hwaddr addr, |
| 3284 | hwaddr *plen, |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3285 | int is_write) |
| 3286 | { |
| 3287 | return address_space_map(&address_space_memory, addr, plen, is_write); |
| 3288 | } |
| 3289 | |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3290 | void cpu_physical_memory_unmap(void *buffer, hwaddr len, |
| 3291 | int is_write, hwaddr access_len) |
Avi Kivity | ac1970f | 2012-10-03 16:22:53 +0200 | [diff] [blame] | 3292 | { |
| 3293 | return address_space_unmap(&address_space_memory, buffer, len, is_write, access_len); |
| 3294 | } |
| 3295 | |
Paolo Bonzini | 0ce265f | 2016-11-22 11:34:02 +0100 | [diff] [blame] | 3296 | #define ARG1_DECL AddressSpace *as |
| 3297 | #define ARG1 as |
| 3298 | #define SUFFIX |
| 3299 | #define TRANSLATE(...) address_space_translate(as, __VA_ARGS__) |
| 3300 | #define IS_DIRECT(mr, is_write) memory_access_is_direct(mr, is_write) |
| 3301 | #define MAP_RAM(mr, ofs) qemu_map_ram_ptr((mr)->ram_block, ofs) |
| 3302 | #define INVALIDATE(mr, ofs, len) invalidate_and_set_dirty(mr, ofs, len) |
| 3303 | #define RCU_READ_LOCK(...) rcu_read_lock() |
| 3304 | #define RCU_READ_UNLOCK(...) rcu_read_unlock() |
| 3305 | #include "memory_ldst.inc.c" |
Alexander Graf | 1e78bcc | 2011-07-06 09:09:23 +0200 | [diff] [blame] | 3306 | |
Paolo Bonzini | 1f4e496 | 2016-11-22 12:04:52 +0100 | [diff] [blame] | 3307 | int64_t address_space_cache_init(MemoryRegionCache *cache, |
| 3308 | AddressSpace *as, |
| 3309 | hwaddr addr, |
| 3310 | hwaddr len, |
| 3311 | bool is_write) |
| 3312 | { |
Paolo Bonzini | 90c4fe5 | 2017-04-03 13:41:28 +0200 | [diff] [blame] | 3313 | cache->len = len; |
| 3314 | cache->as = as; |
| 3315 | cache->xlat = addr; |
| 3316 | return len; |
Paolo Bonzini | 1f4e496 | 2016-11-22 12:04:52 +0100 | [diff] [blame] | 3317 | } |
| 3318 | |
| 3319 | void address_space_cache_invalidate(MemoryRegionCache *cache, |
| 3320 | hwaddr addr, |
| 3321 | hwaddr access_len) |
| 3322 | { |
Paolo Bonzini | 1f4e496 | 2016-11-22 12:04:52 +0100 | [diff] [blame] | 3323 | } |
| 3324 | |
| 3325 | void address_space_cache_destroy(MemoryRegionCache *cache) |
| 3326 | { |
Paolo Bonzini | 90c4fe5 | 2017-04-03 13:41:28 +0200 | [diff] [blame] | 3327 | cache->as = NULL; |
Paolo Bonzini | 1f4e496 | 2016-11-22 12:04:52 +0100 | [diff] [blame] | 3328 | } |
| 3329 | |
| 3330 | #define ARG1_DECL MemoryRegionCache *cache |
| 3331 | #define ARG1 cache |
| 3332 | #define SUFFIX _cached |
Paolo Bonzini | 90c4fe5 | 2017-04-03 13:41:28 +0200 | [diff] [blame] | 3333 | #define TRANSLATE(addr, ...) \ |
| 3334 | address_space_translate(cache->as, cache->xlat + (addr), __VA_ARGS__) |
Paolo Bonzini | 1f4e496 | 2016-11-22 12:04:52 +0100 | [diff] [blame] | 3335 | #define IS_DIRECT(mr, is_write) true |
Paolo Bonzini | 90c4fe5 | 2017-04-03 13:41:28 +0200 | [diff] [blame] | 3336 | #define MAP_RAM(mr, ofs) qemu_map_ram_ptr((mr)->ram_block, ofs) |
| 3337 | #define INVALIDATE(mr, ofs, len) invalidate_and_set_dirty(mr, ofs, len) |
| 3338 | #define RCU_READ_LOCK() rcu_read_lock() |
| 3339 | #define RCU_READ_UNLOCK() rcu_read_unlock() |
Paolo Bonzini | 1f4e496 | 2016-11-22 12:04:52 +0100 | [diff] [blame] | 3340 | #include "memory_ldst.inc.c" |
| 3341 | |
aliguori | 5e2972f | 2009-03-28 17:51:36 +0000 | [diff] [blame] | 3342 | /* virtual memory access for debug (includes writing to ROM) */ |
Andreas Färber | f17ec44 | 2013-06-29 19:40:58 +0200 | [diff] [blame] | 3343 | int cpu_memory_rw_debug(CPUState *cpu, target_ulong addr, |
bellard | b448f2f | 2004-02-25 23:24:04 +0000 | [diff] [blame] | 3344 | uint8_t *buf, int len, int is_write) |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3345 | { |
| 3346 | int l; |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3347 | hwaddr phys_addr; |
j_mayer | 9b3c35e | 2007-04-07 11:21:28 +0000 | [diff] [blame] | 3348 | target_ulong page; |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3349 | |
Christian Borntraeger | 79ca7a1 | 2017-03-07 15:19:08 +0100 | [diff] [blame] | 3350 | cpu_synchronize_state(cpu); |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3351 | while (len > 0) { |
Peter Maydell | 5232e4c | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 3352 | int asidx; |
| 3353 | MemTxAttrs attrs; |
| 3354 | |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3355 | page = addr & TARGET_PAGE_MASK; |
Peter Maydell | 5232e4c | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 3356 | phys_addr = cpu_get_phys_page_attrs_debug(cpu, page, &attrs); |
| 3357 | asidx = cpu_asidx_from_attrs(cpu, attrs); |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3358 | /* if no physical page mapped, return an error */ |
| 3359 | if (phys_addr == -1) |
| 3360 | return -1; |
| 3361 | l = (page + TARGET_PAGE_SIZE) - addr; |
| 3362 | if (l > len) |
| 3363 | l = len; |
aliguori | 5e2972f | 2009-03-28 17:51:36 +0000 | [diff] [blame] | 3364 | phys_addr += (addr & ~TARGET_PAGE_MASK); |
Edgar E. Iglesias | 2e38847 | 2013-12-13 16:31:02 +1000 | [diff] [blame] | 3365 | if (is_write) { |
Peter Maydell | 5232e4c | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 3366 | cpu_physical_memory_write_rom(cpu->cpu_ases[asidx].as, |
| 3367 | phys_addr, buf, l); |
Edgar E. Iglesias | 2e38847 | 2013-12-13 16:31:02 +1000 | [diff] [blame] | 3368 | } else { |
Peter Maydell | 5232e4c | 2016-01-21 14:15:06 +0000 | [diff] [blame] | 3369 | address_space_rw(cpu->cpu_ases[asidx].as, phys_addr, |
| 3370 | MEMTXATTRS_UNSPECIFIED, |
Peter Maydell | 5c9eb02 | 2015-04-26 16:49:24 +0100 | [diff] [blame] | 3371 | buf, l, 0); |
Edgar E. Iglesias | 2e38847 | 2013-12-13 16:31:02 +1000 | [diff] [blame] | 3372 | } |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3373 | len -= l; |
| 3374 | buf += l; |
| 3375 | addr += l; |
| 3376 | } |
| 3377 | return 0; |
| 3378 | } |
Dr. David Alan Gilbert | 038629a | 2015-11-05 18:10:29 +0000 | [diff] [blame] | 3379 | |
| 3380 | /* |
| 3381 | * Allows code that needs to deal with migration bitmaps etc to still be built |
| 3382 | * target independent. |
| 3383 | */ |
Juan Quintela | 20afaed | 2017-03-21 09:09:14 +0100 | [diff] [blame] | 3384 | size_t qemu_target_page_size(void) |
Dr. David Alan Gilbert | 038629a | 2015-11-05 18:10:29 +0000 | [diff] [blame] | 3385 | { |
Juan Quintela | 20afaed | 2017-03-21 09:09:14 +0100 | [diff] [blame] | 3386 | return TARGET_PAGE_SIZE; |
Dr. David Alan Gilbert | 038629a | 2015-11-05 18:10:29 +0000 | [diff] [blame] | 3387 | } |
| 3388 | |
Paul Brook | a68fe89 | 2010-03-01 00:08:59 +0000 | [diff] [blame] | 3389 | #endif |
bellard | 13eb76e | 2004-01-24 15:23:36 +0000 | [diff] [blame] | 3390 | |
Blue Swirl | 8e4a424 | 2013-01-06 18:30:17 +0000 | [diff] [blame] | 3391 | /* |
| 3392 | * A helper function for the _utterly broken_ virtio device model to find out if |
| 3393 | * it's running on a big endian machine. Don't do this at home kids! |
| 3394 | */ |
Greg Kurz | 98ed8ec | 2014-06-24 19:26:29 +0200 | [diff] [blame] | 3395 | bool target_words_bigendian(void); |
| 3396 | bool target_words_bigendian(void) |
Blue Swirl | 8e4a424 | 2013-01-06 18:30:17 +0000 | [diff] [blame] | 3397 | { |
| 3398 | #if defined(TARGET_WORDS_BIGENDIAN) |
| 3399 | return true; |
| 3400 | #else |
| 3401 | return false; |
| 3402 | #endif |
| 3403 | } |
| 3404 | |
Wen Congyang | 76f3553 | 2012-05-07 12:04:18 +0800 | [diff] [blame] | 3405 | #ifndef CONFIG_USER_ONLY |
Avi Kivity | a8170e5 | 2012-10-23 12:30:10 +0200 | [diff] [blame] | 3406 | bool cpu_physical_memory_is_io(hwaddr phys_addr) |
Wen Congyang | 76f3553 | 2012-05-07 12:04:18 +0800 | [diff] [blame] | 3407 | { |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 3408 | MemoryRegion*mr; |
Paolo Bonzini | 149f54b | 2013-05-24 12:59:37 +0200 | [diff] [blame] | 3409 | hwaddr l = 1; |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3410 | bool res; |
Wen Congyang | 76f3553 | 2012-05-07 12:04:18 +0800 | [diff] [blame] | 3411 | |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3412 | rcu_read_lock(); |
Paolo Bonzini | 5c8a00c | 2013-05-29 12:42:00 +0200 | [diff] [blame] | 3413 | mr = address_space_translate(&address_space_memory, |
| 3414 | phys_addr, &phys_addr, &l, false); |
Wen Congyang | 76f3553 | 2012-05-07 12:04:18 +0800 | [diff] [blame] | 3415 | |
Paolo Bonzini | 41063e1 | 2015-03-18 14:21:43 +0100 | [diff] [blame] | 3416 | res = !(memory_region_is_ram(mr) || memory_region_is_romd(mr)); |
| 3417 | rcu_read_unlock(); |
| 3418 | return res; |
Wen Congyang | 76f3553 | 2012-05-07 12:04:18 +0800 | [diff] [blame] | 3419 | } |
Michael R. Hines | bd2fa51 | 2013-06-25 21:35:34 -0400 | [diff] [blame] | 3420 | |
Dr. David Alan Gilbert | e380705 | 2015-05-21 13:24:13 +0100 | [diff] [blame] | 3421 | int qemu_ram_foreach_block(RAMBlockIterFunc func, void *opaque) |
Michael R. Hines | bd2fa51 | 2013-06-25 21:35:34 -0400 | [diff] [blame] | 3422 | { |
| 3423 | RAMBlock *block; |
Dr. David Alan Gilbert | e380705 | 2015-05-21 13:24:13 +0100 | [diff] [blame] | 3424 | int ret = 0; |
Michael R. Hines | bd2fa51 | 2013-06-25 21:35:34 -0400 | [diff] [blame] | 3425 | |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 3426 | rcu_read_lock(); |
| 3427 | QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { |
Dr. David Alan Gilbert | e380705 | 2015-05-21 13:24:13 +0100 | [diff] [blame] | 3428 | ret = func(block->idstr, block->host, block->offset, |
| 3429 | block->used_length, opaque); |
| 3430 | if (ret) { |
| 3431 | break; |
| 3432 | } |
Michael R. Hines | bd2fa51 | 2013-06-25 21:35:34 -0400 | [diff] [blame] | 3433 | } |
Mike Day | 0dc3f44 | 2013-09-05 14:41:35 -0400 | [diff] [blame] | 3434 | rcu_read_unlock(); |
Dr. David Alan Gilbert | e380705 | 2015-05-21 13:24:13 +0100 | [diff] [blame] | 3435 | return ret; |
Michael R. Hines | bd2fa51 | 2013-06-25 21:35:34 -0400 | [diff] [blame] | 3436 | } |
Dr. David Alan Gilbert | d3a5038 | 2017-02-24 18:28:32 +0000 | [diff] [blame] | 3437 | |
| 3438 | /* |
| 3439 | * Unmap pages of memory from start to start+length such that |
| 3440 | * they a) read as 0, b) Trigger whatever fault mechanism |
| 3441 | * the OS provides for postcopy. |
| 3442 | * The pages must be unmapped by the end of the function. |
| 3443 | * Returns: 0 on success, none-0 on failure |
| 3444 | * |
| 3445 | */ |
| 3446 | int ram_block_discard_range(RAMBlock *rb, uint64_t start, size_t length) |
| 3447 | { |
| 3448 | int ret = -1; |
| 3449 | |
| 3450 | uint8_t *host_startaddr = rb->host + start; |
| 3451 | |
| 3452 | if ((uintptr_t)host_startaddr & (rb->page_size - 1)) { |
| 3453 | error_report("ram_block_discard_range: Unaligned start address: %p", |
| 3454 | host_startaddr); |
| 3455 | goto err; |
| 3456 | } |
| 3457 | |
| 3458 | if ((start + length) <= rb->used_length) { |
| 3459 | uint8_t *host_endaddr = host_startaddr + length; |
| 3460 | if ((uintptr_t)host_endaddr & (rb->page_size - 1)) { |
| 3461 | error_report("ram_block_discard_range: Unaligned end address: %p", |
| 3462 | host_endaddr); |
| 3463 | goto err; |
| 3464 | } |
| 3465 | |
| 3466 | errno = ENOTSUP; /* If we are missing MADVISE etc */ |
| 3467 | |
Dr. David Alan Gilbert | e2fa71f | 2017-02-24 18:28:33 +0000 | [diff] [blame] | 3468 | if (rb->page_size == qemu_host_page_size) { |
Dr. David Alan Gilbert | d3a5038 | 2017-02-24 18:28:32 +0000 | [diff] [blame] | 3469 | #if defined(CONFIG_MADVISE) |
Dr. David Alan Gilbert | e2fa71f | 2017-02-24 18:28:33 +0000 | [diff] [blame] | 3470 | /* Note: We need the madvise MADV_DONTNEED behaviour of definitely |
| 3471 | * freeing the page. |
| 3472 | */ |
| 3473 | ret = madvise(host_startaddr, length, MADV_DONTNEED); |
Dr. David Alan Gilbert | d3a5038 | 2017-02-24 18:28:32 +0000 | [diff] [blame] | 3474 | #endif |
Dr. David Alan Gilbert | e2fa71f | 2017-02-24 18:28:33 +0000 | [diff] [blame] | 3475 | } else { |
| 3476 | /* Huge page case - unfortunately it can't do DONTNEED, but |
| 3477 | * it can do the equivalent by FALLOC_FL_PUNCH_HOLE in the |
| 3478 | * huge page file. |
| 3479 | */ |
| 3480 | #ifdef CONFIG_FALLOCATE_PUNCH_HOLE |
| 3481 | ret = fallocate(rb->fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, |
| 3482 | start, length); |
| 3483 | #endif |
| 3484 | } |
Dr. David Alan Gilbert | d3a5038 | 2017-02-24 18:28:32 +0000 | [diff] [blame] | 3485 | if (ret) { |
| 3486 | ret = -errno; |
| 3487 | error_report("ram_block_discard_range: Failed to discard range " |
| 3488 | "%s:%" PRIx64 " +%zx (%d)", |
| 3489 | rb->idstr, start, length, ret); |
| 3490 | } |
| 3491 | } else { |
| 3492 | error_report("ram_block_discard_range: Overrun block '%s' (%" PRIu64 |
| 3493 | "/%zx/" RAM_ADDR_FMT")", |
| 3494 | rb->idstr, start, length, rb->used_length); |
| 3495 | } |
| 3496 | |
| 3497 | err: |
| 3498 | return ret; |
| 3499 | } |
| 3500 | |
Peter Maydell | ec3f8c9 | 2013-06-27 20:53:38 +0100 | [diff] [blame] | 3501 | #endif |