aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 1 | /* |
Amit Shah | d4443cb | 2011-07-20 13:37:01 +0530 | [diff] [blame] | 2 | * Virtio Balloon Device |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 3 | * |
| 4 | * Copyright IBM, Corp. 2008 |
Amit Shah | d4443cb | 2011-07-20 13:37:01 +0530 | [diff] [blame] | 5 | * Copyright (C) 2011 Red Hat, Inc. |
| 6 | * Copyright (C) 2011 Amit Shah <amit.shah@redhat.com> |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 7 | * |
| 8 | * Authors: |
| 9 | * Anthony Liguori <aliguori@us.ibm.com> |
| 10 | * |
| 11 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 12 | * the COPYING file in the top-level directory. |
| 13 | * |
| 14 | */ |
| 15 | |
Peter Maydell | 9b8bfe2 | 2016-01-26 18:17:07 +0000 | [diff] [blame] | 16 | #include "qemu/osdep.h" |
Paolo Bonzini | 1de7afc | 2012-12-17 18:20:00 +0100 | [diff] [blame] | 17 | #include "qemu/iov.h" |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 18 | #include "qemu/timer.h" |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 19 | #include "qemu-common.h" |
Paolo Bonzini | 0d09e41 | 2013-02-05 17:06:20 +0100 | [diff] [blame] | 20 | #include "hw/virtio/virtio.h" |
| 21 | #include "hw/i386/pc.h" |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 22 | #include "sysemu/balloon.h" |
Paolo Bonzini | 0d09e41 | 2013-02-05 17:06:20 +0100 | [diff] [blame] | 23 | #include "hw/virtio/virtio-balloon.h" |
Paolo Bonzini | 9c17d61 | 2012-12-17 18:20:04 +0100 | [diff] [blame] | 24 | #include "sysemu/kvm.h" |
Paolo Bonzini | 022c62c | 2012-12-17 18:19:49 +0100 | [diff] [blame] | 25 | #include "exec/address-spaces.h" |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 26 | #include "qapi/visitor.h" |
Wenchao Xia | aef9d31 | 2014-06-18 08:43:51 +0200 | [diff] [blame] | 27 | #include "qapi-event.h" |
zhanghailiang | 6adfdc5 | 2014-11-17 13:11:10 +0800 | [diff] [blame] | 28 | #include "trace.h" |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 29 | |
Paolo Bonzini | 0d09e41 | 2013-02-05 17:06:20 +0100 | [diff] [blame] | 30 | #include "hw/virtio/virtio-bus.h" |
Rusty Russell | 8609d2a | 2014-06-24 19:43:22 +0200 | [diff] [blame] | 31 | #include "hw/virtio/virtio-access.h" |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 32 | |
Thomas Huth | 01310e2 | 2016-04-14 10:50:07 +0200 | [diff] [blame] | 33 | #define BALLOON_PAGE_SIZE (1 << VIRTIO_BALLOON_PFN_SHIFT) |
| 34 | |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 35 | static void balloon_page(void *addr, int deflate) |
| 36 | { |
Dr. David Alan Gilbert | 371ff5a | 2015-11-05 18:11:23 +0000 | [diff] [blame] | 37 | if (!qemu_balloon_is_inhibited() && (!kvm_enabled() || |
| 38 | kvm_has_sync_mmu())) { |
Thomas Huth | 01310e2 | 2016-04-14 10:50:07 +0200 | [diff] [blame] | 39 | qemu_madvise(addr, BALLOON_PAGE_SIZE, |
Andreas Färber | e78815a | 2010-09-25 11:26:05 +0000 | [diff] [blame] | 40 | deflate ? QEMU_MADV_WILLNEED : QEMU_MADV_DONTNEED); |
Dr. David Alan Gilbert | 371ff5a | 2015-11-05 18:11:23 +0000 | [diff] [blame] | 41 | } |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 42 | } |
| 43 | |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 44 | static const char *balloon_stat_names[] = { |
| 45 | [VIRTIO_BALLOON_S_SWAP_IN] = "stat-swap-in", |
| 46 | [VIRTIO_BALLOON_S_SWAP_OUT] = "stat-swap-out", |
| 47 | [VIRTIO_BALLOON_S_MAJFLT] = "stat-major-faults", |
| 48 | [VIRTIO_BALLOON_S_MINFLT] = "stat-minor-faults", |
| 49 | [VIRTIO_BALLOON_S_MEMFREE] = "stat-free-memory", |
| 50 | [VIRTIO_BALLOON_S_MEMTOT] = "stat-total-memory", |
Denis V. Lunev | a0d0648 | 2016-02-24 10:50:48 +0300 | [diff] [blame] | 51 | [VIRTIO_BALLOON_S_AVAIL] = "stat-available-memory", |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 52 | [VIRTIO_BALLOON_S_NR] = NULL |
| 53 | }; |
| 54 | |
Adam Litke | 625a5be | 2010-01-26 14:17:35 -0600 | [diff] [blame] | 55 | /* |
| 56 | * reset_stats - Mark all items in the stats array as unset |
| 57 | * |
Stefan Weil | 52f3502 | 2013-07-24 19:48:56 +0200 | [diff] [blame] | 58 | * This function needs to be called at device initialization and before |
| 59 | * updating to a set of newly-generated stats. This will ensure that no |
Adam Litke | 625a5be | 2010-01-26 14:17:35 -0600 | [diff] [blame] | 60 | * stale values stick around in case the guest reports a subset of the supported |
| 61 | * statistics. |
| 62 | */ |
| 63 | static inline void reset_stats(VirtIOBalloon *dev) |
| 64 | { |
| 65 | int i; |
| 66 | for (i = 0; i < VIRTIO_BALLOON_S_NR; dev->stats[i++] = -1); |
| 67 | } |
| 68 | |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 69 | static bool balloon_stats_supported(const VirtIOBalloon *s) |
| 70 | { |
KONRAD Frederic | c96cace | 2013-03-27 10:49:14 +0100 | [diff] [blame] | 71 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
Cornelia Huck | 95129d6 | 2015-08-17 11:48:29 +0200 | [diff] [blame] | 72 | return virtio_vdev_has_feature(vdev, VIRTIO_BALLOON_F_STATS_VQ); |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | static bool balloon_stats_enabled(const VirtIOBalloon *s) |
| 76 | { |
| 77 | return s->stats_poll_interval > 0; |
| 78 | } |
| 79 | |
| 80 | static void balloon_stats_destroy_timer(VirtIOBalloon *s) |
| 81 | { |
| 82 | if (balloon_stats_enabled(s)) { |
Alex Bligh | bc72ad6 | 2013-08-21 16:03:08 +0100 | [diff] [blame] | 83 | timer_del(s->stats_timer); |
| 84 | timer_free(s->stats_timer); |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 85 | s->stats_timer = NULL; |
| 86 | s->stats_poll_interval = 0; |
| 87 | } |
| 88 | } |
| 89 | |
Luiz Capitulino | 1f9296b | 2014-09-15 12:00:11 -0400 | [diff] [blame] | 90 | static void balloon_stats_change_timer(VirtIOBalloon *s, int64_t secs) |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 91 | { |
Alex Bligh | bc72ad6 | 2013-08-21 16:03:08 +0100 | [diff] [blame] | 92 | timer_mod(s->stats_timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + secs * 1000); |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 93 | } |
| 94 | |
| 95 | static void balloon_stats_poll_cb(void *opaque) |
| 96 | { |
| 97 | VirtIOBalloon *s = opaque; |
KONRAD Frederic | c96cace | 2013-03-27 10:49:14 +0100 | [diff] [blame] | 98 | VirtIODevice *vdev = VIRTIO_DEVICE(s); |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 99 | |
Ladi Prosek | 4eae2a6 | 2016-03-01 12:14:03 +0100 | [diff] [blame] | 100 | if (s->stats_vq_elem == NULL || !balloon_stats_supported(s)) { |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 101 | /* re-schedule */ |
| 102 | balloon_stats_change_timer(s, s->stats_poll_interval); |
| 103 | return; |
| 104 | } |
| 105 | |
Paolo Bonzini | 51b19eb | 2016-02-04 16:26:51 +0200 | [diff] [blame] | 106 | virtqueue_push(s->svq, s->stats_vq_elem, s->stats_vq_offset); |
KONRAD Frederic | c96cace | 2013-03-27 10:49:14 +0100 | [diff] [blame] | 107 | virtio_notify(vdev, s->svq); |
Paolo Bonzini | 51b19eb | 2016-02-04 16:26:51 +0200 | [diff] [blame] | 108 | g_free(s->stats_vq_elem); |
| 109 | s->stats_vq_elem = NULL; |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 110 | } |
| 111 | |
Eric Blake | d7bce99 | 2016-01-29 06:48:55 -0700 | [diff] [blame] | 112 | static void balloon_stats_get_all(Object *obj, Visitor *v, const char *name, |
| 113 | void *opaque, Error **errp) |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 114 | { |
Markus Armbruster | 2ddb16a | 2014-05-07 09:53:52 +0200 | [diff] [blame] | 115 | Error *err = NULL; |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 116 | VirtIOBalloon *s = opaque; |
| 117 | int i; |
| 118 | |
Eric Blake | 337283d | 2016-01-29 06:48:57 -0700 | [diff] [blame] | 119 | visit_start_struct(v, name, NULL, 0, &err); |
Markus Armbruster | 2ddb16a | 2014-05-07 09:53:52 +0200 | [diff] [blame] | 120 | if (err) { |
| 121 | goto out; |
| 122 | } |
Eric Blake | 51e72bc | 2016-01-29 06:48:54 -0700 | [diff] [blame] | 123 | visit_type_int(v, "last-update", &s->stats_last_update, &err); |
Markus Armbruster | 297a364 | 2014-05-07 09:53:54 +0200 | [diff] [blame] | 124 | if (err) { |
| 125 | goto out_end; |
| 126 | } |
Markus Armbruster | 2ddb16a | 2014-05-07 09:53:52 +0200 | [diff] [blame] | 127 | |
Eric Blake | 337283d | 2016-01-29 06:48:57 -0700 | [diff] [blame] | 128 | visit_start_struct(v, "stats", NULL, 0, &err); |
Markus Armbruster | 2ddb16a | 2014-05-07 09:53:52 +0200 | [diff] [blame] | 129 | if (err) { |
| 130 | goto out_end; |
| 131 | } |
Eric Blake | 9dbb8fa | 2016-01-29 06:48:45 -0700 | [diff] [blame] | 132 | for (i = 0; i < VIRTIO_BALLOON_S_NR; i++) { |
Eric Blake | 51e72bc | 2016-01-29 06:48:54 -0700 | [diff] [blame] | 133 | visit_type_uint64(v, balloon_stat_names[i], &s->stats[i], &err); |
Eric Blake | 9dbb8fa | 2016-01-29 06:48:45 -0700 | [diff] [blame] | 134 | if (err) { |
Eric Blake | 15c2f66 | 2016-04-28 15:45:27 -0600 | [diff] [blame] | 135 | goto out_nested; |
Eric Blake | 9dbb8fa | 2016-01-29 06:48:45 -0700 | [diff] [blame] | 136 | } |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 137 | } |
Eric Blake | 15c2f66 | 2016-04-28 15:45:27 -0600 | [diff] [blame] | 138 | visit_check_struct(v, &err); |
| 139 | out_nested: |
Eric Blake | 1158bb2 | 2016-06-09 10:48:34 -0600 | [diff] [blame] | 140 | visit_end_struct(v, NULL); |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 141 | |
Eric Blake | 15c2f66 | 2016-04-28 15:45:27 -0600 | [diff] [blame] | 142 | if (!err) { |
| 143 | visit_check_struct(v, &err); |
| 144 | } |
Markus Armbruster | 2ddb16a | 2014-05-07 09:53:52 +0200 | [diff] [blame] | 145 | out_end: |
Eric Blake | 1158bb2 | 2016-06-09 10:48:34 -0600 | [diff] [blame] | 146 | visit_end_struct(v, NULL); |
Markus Armbruster | 2ddb16a | 2014-05-07 09:53:52 +0200 | [diff] [blame] | 147 | out: |
| 148 | error_propagate(errp, err); |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 149 | } |
| 150 | |
Eric Blake | 4fa4549 | 2016-01-29 06:48:53 -0700 | [diff] [blame] | 151 | static void balloon_stats_get_poll_interval(Object *obj, Visitor *v, |
Eric Blake | d7bce99 | 2016-01-29 06:48:55 -0700 | [diff] [blame] | 152 | const char *name, void *opaque, |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 153 | Error **errp) |
| 154 | { |
| 155 | VirtIOBalloon *s = opaque; |
Eric Blake | 51e72bc | 2016-01-29 06:48:54 -0700 | [diff] [blame] | 156 | visit_type_int(v, name, &s->stats_poll_interval, errp); |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 157 | } |
| 158 | |
Eric Blake | 4fa4549 | 2016-01-29 06:48:53 -0700 | [diff] [blame] | 159 | static void balloon_stats_set_poll_interval(Object *obj, Visitor *v, |
Eric Blake | d7bce99 | 2016-01-29 06:48:55 -0700 | [diff] [blame] | 160 | const char *name, void *opaque, |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 161 | Error **errp) |
| 162 | { |
| 163 | VirtIOBalloon *s = opaque; |
Markus Armbruster | 65cd906 | 2014-04-25 12:44:22 +0200 | [diff] [blame] | 164 | Error *local_err = NULL; |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 165 | int64_t value; |
| 166 | |
Eric Blake | 51e72bc | 2016-01-29 06:48:54 -0700 | [diff] [blame] | 167 | visit_type_int(v, name, &value, &local_err); |
Markus Armbruster | 65cd906 | 2014-04-25 12:44:22 +0200 | [diff] [blame] | 168 | if (local_err) { |
| 169 | error_propagate(errp, local_err); |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 170 | return; |
| 171 | } |
| 172 | |
| 173 | if (value < 0) { |
| 174 | error_setg(errp, "timer value must be greater than zero"); |
| 175 | return; |
| 176 | } |
| 177 | |
Markus Armbruster | 22644cd | 2014-10-01 18:43:44 +0200 | [diff] [blame] | 178 | if (value > UINT32_MAX) { |
Luiz Capitulino | 1f9296b | 2014-09-15 12:00:11 -0400 | [diff] [blame] | 179 | error_setg(errp, "timer value is too big"); |
| 180 | return; |
| 181 | } |
| 182 | |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 183 | if (value == s->stats_poll_interval) { |
| 184 | return; |
| 185 | } |
| 186 | |
| 187 | if (value == 0) { |
| 188 | /* timer=0 disables the timer */ |
| 189 | balloon_stats_destroy_timer(s); |
| 190 | return; |
| 191 | } |
| 192 | |
| 193 | if (balloon_stats_enabled(s)) { |
| 194 | /* timer interval change */ |
| 195 | s->stats_poll_interval = value; |
| 196 | balloon_stats_change_timer(s, value); |
| 197 | return; |
| 198 | } |
| 199 | |
| 200 | /* create a new timer */ |
| 201 | g_assert(s->stats_timer == NULL); |
Alex Bligh | bc72ad6 | 2013-08-21 16:03:08 +0100 | [diff] [blame] | 202 | s->stats_timer = timer_new_ms(QEMU_CLOCK_VIRTUAL, balloon_stats_poll_cb, s); |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 203 | s->stats_poll_interval = value; |
| 204 | balloon_stats_change_timer(s, 0); |
| 205 | } |
| 206 | |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 207 | static void virtio_balloon_handle_output(VirtIODevice *vdev, VirtQueue *vq) |
| 208 | { |
KONRAD Frederic | c96cace | 2013-03-27 10:49:14 +0100 | [diff] [blame] | 209 | VirtIOBalloon *s = VIRTIO_BALLOON(vdev); |
Paolo Bonzini | 51b19eb | 2016-02-04 16:26:51 +0200 | [diff] [blame] | 210 | VirtQueueElement *elem; |
Avi Kivity | b7c28c7 | 2011-12-19 13:18:13 +0200 | [diff] [blame] | 211 | MemoryRegionSection section; |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 212 | |
Paolo Bonzini | 51b19eb | 2016-02-04 16:26:51 +0200 | [diff] [blame] | 213 | for (;;) { |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 214 | size_t offset = 0; |
| 215 | uint32_t pfn; |
Paolo Bonzini | 51b19eb | 2016-02-04 16:26:51 +0200 | [diff] [blame] | 216 | elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); |
| 217 | if (!elem) { |
| 218 | return; |
| 219 | } |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 220 | |
Paolo Bonzini | 51b19eb | 2016-02-04 16:26:51 +0200 | [diff] [blame] | 221 | while (iov_to_buf(elem->out_sg, elem->out_num, offset, &pfn, 4) == 4) { |
Anthony Liguori | c227f09 | 2009-10-01 16:12:16 -0500 | [diff] [blame] | 222 | ram_addr_t pa; |
| 223 | ram_addr_t addr; |
Rusty Russell | 8609d2a | 2014-06-24 19:43:22 +0200 | [diff] [blame] | 224 | int p = virtio_ldl_p(vdev, &pfn); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 225 | |
Rusty Russell | 8609d2a | 2014-06-24 19:43:22 +0200 | [diff] [blame] | 226 | pa = (ram_addr_t) p << VIRTIO_BALLOON_PFN_SHIFT; |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 227 | offset += 4; |
| 228 | |
Avi Kivity | b7c28c7 | 2011-12-19 13:18:13 +0200 | [diff] [blame] | 229 | /* FIXME: remove get_system_memory(), but how? */ |
| 230 | section = memory_region_find(get_system_memory(), pa, 1); |
Paolo Bonzini | 052e87b | 2013-05-27 10:08:27 +0200 | [diff] [blame] | 231 | if (!int128_nz(section.size) || !memory_region_is_ram(section.mr)) |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 232 | continue; |
| 233 | |
zhanghailiang | 6adfdc5 | 2014-11-17 13:11:10 +0800 | [diff] [blame] | 234 | trace_virtio_balloon_handle_output(memory_region_name(section.mr), |
| 235 | pa); |
Avi Kivity | b7c28c7 | 2011-12-19 13:18:13 +0200 | [diff] [blame] | 236 | /* Using memory_region_get_ram_ptr is bending the rules a bit, but |
pbrook | 5c130f6 | 2009-04-10 14:29:45 +0000 | [diff] [blame] | 237 | should be OK because we only want a single page. */ |
Avi Kivity | b7c28c7 | 2011-12-19 13:18:13 +0200 | [diff] [blame] | 238 | addr = section.offset_within_region; |
| 239 | balloon_page(memory_region_get_ram_ptr(section.mr) + addr, |
| 240 | !!(vq == s->dvq)); |
Paolo Bonzini | dfde4e6 | 2013-05-06 10:46:11 +0200 | [diff] [blame] | 241 | memory_region_unref(section.mr); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 242 | } |
| 243 | |
Paolo Bonzini | 51b19eb | 2016-02-04 16:26:51 +0200 | [diff] [blame] | 244 | virtqueue_push(vq, elem, offset); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 245 | virtio_notify(vdev, vq); |
Paolo Bonzini | 51b19eb | 2016-02-04 16:26:51 +0200 | [diff] [blame] | 246 | g_free(elem); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 247 | } |
| 248 | } |
| 249 | |
Adam Litke | 625a5be | 2010-01-26 14:17:35 -0600 | [diff] [blame] | 250 | static void virtio_balloon_receive_stats(VirtIODevice *vdev, VirtQueue *vq) |
| 251 | { |
KONRAD Frederic | c96cace | 2013-03-27 10:49:14 +0100 | [diff] [blame] | 252 | VirtIOBalloon *s = VIRTIO_BALLOON(vdev); |
Paolo Bonzini | 51b19eb | 2016-02-04 16:26:51 +0200 | [diff] [blame] | 253 | VirtQueueElement *elem; |
Adam Litke | 625a5be | 2010-01-26 14:17:35 -0600 | [diff] [blame] | 254 | VirtIOBalloonStat stat; |
| 255 | size_t offset = 0; |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 256 | qemu_timeval tv; |
Adam Litke | 625a5be | 2010-01-26 14:17:35 -0600 | [diff] [blame] | 257 | |
Ladi Prosek | 4eae2a6 | 2016-03-01 12:14:03 +0100 | [diff] [blame] | 258 | elem = virtqueue_pop(vq, sizeof(VirtQueueElement)); |
Paolo Bonzini | 51b19eb | 2016-02-04 16:26:51 +0200 | [diff] [blame] | 259 | if (!elem) { |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 260 | goto out; |
Adam Litke | 625a5be | 2010-01-26 14:17:35 -0600 | [diff] [blame] | 261 | } |
| 262 | |
Ladi Prosek | 4eae2a6 | 2016-03-01 12:14:03 +0100 | [diff] [blame] | 263 | if (s->stats_vq_elem != NULL) { |
| 264 | /* This should never happen if the driver follows the spec. */ |
| 265 | virtqueue_push(vq, s->stats_vq_elem, 0); |
| 266 | virtio_notify(vdev, vq); |
| 267 | g_free(s->stats_vq_elem); |
| 268 | } |
| 269 | |
| 270 | s->stats_vq_elem = elem; |
| 271 | |
Adam Litke | 625a5be | 2010-01-26 14:17:35 -0600 | [diff] [blame] | 272 | /* Initialize the stats to get rid of any stale values. This is only |
| 273 | * needed to handle the case where a guest supports fewer stats than it |
| 274 | * used to (ie. it has booted into an old kernel). |
| 275 | */ |
| 276 | reset_stats(s); |
| 277 | |
Michael Tokarev | dcf6f5e | 2012-03-11 18:05:12 +0400 | [diff] [blame] | 278 | while (iov_to_buf(elem->out_sg, elem->out_num, offset, &stat, sizeof(stat)) |
Amit Shah | fa6111f | 2010-04-27 18:04:06 +0530 | [diff] [blame] | 279 | == sizeof(stat)) { |
Rusty Russell | 8609d2a | 2014-06-24 19:43:22 +0200 | [diff] [blame] | 280 | uint16_t tag = virtio_tswap16(vdev, stat.tag); |
| 281 | uint64_t val = virtio_tswap64(vdev, stat.val); |
Adam Litke | 625a5be | 2010-01-26 14:17:35 -0600 | [diff] [blame] | 282 | |
| 283 | offset += sizeof(stat); |
| 284 | if (tag < VIRTIO_BALLOON_S_NR) |
| 285 | s->stats[tag] = val; |
| 286 | } |
| 287 | s->stats_vq_offset = offset; |
Luiz Capitulino | 7e6ccd9 | 2012-12-01 00:14:57 -0200 | [diff] [blame] | 288 | |
| 289 | if (qemu_gettimeofday(&tv) < 0) { |
| 290 | fprintf(stderr, "warning: %s: failed to get time of day\n", __func__); |
| 291 | goto out; |
| 292 | } |
| 293 | |
| 294 | s->stats_last_update = tv.tv_sec; |
| 295 | |
| 296 | out: |
| 297 | if (balloon_stats_enabled(s)) { |
| 298 | balloon_stats_change_timer(s, s->stats_poll_interval); |
| 299 | } |
Adam Litke | 625a5be | 2010-01-26 14:17:35 -0600 | [diff] [blame] | 300 | } |
| 301 | |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 302 | static void virtio_balloon_get_config(VirtIODevice *vdev, uint8_t *config_data) |
| 303 | { |
KONRAD Frederic | c96cace | 2013-03-27 10:49:14 +0100 | [diff] [blame] | 304 | VirtIOBalloon *dev = VIRTIO_BALLOON(vdev); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 305 | struct virtio_balloon_config config; |
| 306 | |
| 307 | config.num_pages = cpu_to_le32(dev->num_pages); |
| 308 | config.actual = cpu_to_le32(dev->actual); |
| 309 | |
zhanghailiang | 6adfdc5 | 2014-11-17 13:11:10 +0800 | [diff] [blame] | 310 | trace_virtio_balloon_get_config(config.num_pages, config.actual); |
Luiz Capitulino | e6baf61 | 2014-01-09 09:58:16 -0500 | [diff] [blame] | 311 | memcpy(config_data, &config, sizeof(struct virtio_balloon_config)); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 312 | } |
| 313 | |
Vladimir Sementsov-Ogievskiy | 2b75f84 | 2016-02-10 11:49:26 +0300 | [diff] [blame] | 314 | static int build_dimm_list(Object *obj, void *opaque) |
| 315 | { |
| 316 | GSList **list = opaque; |
| 317 | |
| 318 | if (object_dynamic_cast(obj, TYPE_PC_DIMM)) { |
| 319 | DeviceState *dev = DEVICE(obj); |
| 320 | if (dev->realized) { /* only realized DIMMs matter */ |
| 321 | *list = g_slist_prepend(*list, dev); |
| 322 | } |
| 323 | } |
| 324 | |
| 325 | object_child_foreach(obj, build_dimm_list, opaque); |
| 326 | return 0; |
| 327 | } |
| 328 | |
Vladimir Sementsov-Ogievskiy | 39de998 | 2016-02-10 11:49:22 +0300 | [diff] [blame] | 329 | static ram_addr_t get_current_ram_size(void) |
| 330 | { |
Vladimir Sementsov-Ogievskiy | e8dc06d | 2016-02-10 11:49:25 +0300 | [diff] [blame] | 331 | GSList *list = NULL, *item; |
Vladimir Sementsov-Ogievskiy | 39de998 | 2016-02-10 11:49:22 +0300 | [diff] [blame] | 332 | ram_addr_t size = ram_size; |
| 333 | |
Vladimir Sementsov-Ogievskiy | 2b75f84 | 2016-02-10 11:49:26 +0300 | [diff] [blame] | 334 | build_dimm_list(qdev_get_machine(), &list); |
Vladimir Sementsov-Ogievskiy | e8dc06d | 2016-02-10 11:49:25 +0300 | [diff] [blame] | 335 | for (item = list; item; item = g_slist_next(item)) { |
| 336 | Object *obj = OBJECT(item->data); |
Vladimir Sementsov-Ogievskiy | 2b75f84 | 2016-02-10 11:49:26 +0300 | [diff] [blame] | 337 | if (!strcmp(object_get_typename(obj), TYPE_PC_DIMM)) { |
| 338 | size += object_property_get_int(obj, PC_DIMM_SIZE_PROP, |
| 339 | &error_abort); |
| 340 | } |
Vladimir Sementsov-Ogievskiy | 39de998 | 2016-02-10 11:49:22 +0300 | [diff] [blame] | 341 | } |
Vladimir Sementsov-Ogievskiy | e8dc06d | 2016-02-10 11:49:25 +0300 | [diff] [blame] | 342 | g_slist_free(list); |
Vladimir Sementsov-Ogievskiy | 39de998 | 2016-02-10 11:49:22 +0300 | [diff] [blame] | 343 | |
| 344 | return size; |
| 345 | } |
| 346 | |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 347 | static void virtio_balloon_set_config(VirtIODevice *vdev, |
| 348 | const uint8_t *config_data) |
| 349 | { |
KONRAD Frederic | c96cace | 2013-03-27 10:49:14 +0100 | [diff] [blame] | 350 | VirtIOBalloon *dev = VIRTIO_BALLOON(vdev); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 351 | struct virtio_balloon_config config; |
Daniel P. Berrange | 973603a | 2012-06-14 18:12:56 +0100 | [diff] [blame] | 352 | uint32_t oldactual = dev->actual; |
zhanghailiang | 463756d | 2014-11-17 13:11:09 +0800 | [diff] [blame] | 353 | ram_addr_t vm_ram_size = get_current_ram_size(); |
| 354 | |
Luiz Capitulino | e6baf61 | 2014-01-09 09:58:16 -0500 | [diff] [blame] | 355 | memcpy(&config, config_data, sizeof(struct virtio_balloon_config)); |
Alexey Kardashevskiy | e54f177 | 2011-04-07 13:02:04 +1000 | [diff] [blame] | 356 | dev->actual = le32_to_cpu(config.actual); |
Daniel P. Berrange | 973603a | 2012-06-14 18:12:56 +0100 | [diff] [blame] | 357 | if (dev->actual != oldactual) { |
zhanghailiang | 463756d | 2014-11-17 13:11:09 +0800 | [diff] [blame] | 358 | qapi_event_send_balloon_change(vm_ram_size - |
Wenchao Xia | aef9d31 | 2014-06-18 08:43:51 +0200 | [diff] [blame] | 359 | ((ram_addr_t) dev->actual << VIRTIO_BALLOON_PFN_SHIFT), |
| 360 | &error_abort); |
Daniel P. Berrange | 973603a | 2012-06-14 18:12:56 +0100 | [diff] [blame] | 361 | } |
zhanghailiang | 6adfdc5 | 2014-11-17 13:11:10 +0800 | [diff] [blame] | 362 | trace_virtio_balloon_set_config(dev->actual, oldactual); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 363 | } |
| 364 | |
Jason Wang | 9d5b731 | 2015-07-27 17:49:19 +0800 | [diff] [blame] | 365 | static uint64_t virtio_balloon_get_features(VirtIODevice *vdev, uint64_t f, |
| 366 | Error **errp) |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 367 | { |
Denis V. Lunev | e381625 | 2015-06-15 13:52:52 +0300 | [diff] [blame] | 368 | VirtIOBalloon *dev = VIRTIO_BALLOON(vdev); |
| 369 | f |= dev->host_features; |
Cornelia Huck | 40de55a | 2015-06-04 12:34:32 +0200 | [diff] [blame] | 370 | virtio_add_feature(&f, VIRTIO_BALLOON_F_STATS_VQ); |
Michael S. Tsirkin | 8172539 | 2010-01-10 13:52:53 +0200 | [diff] [blame] | 371 | return f; |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 372 | } |
| 373 | |
Luiz Capitulino | 96637bc | 2011-10-21 11:41:37 -0200 | [diff] [blame] | 374 | static void virtio_balloon_stat(void *opaque, BalloonInfo *info) |
Amit Shah | dce911c | 2011-07-20 13:19:07 +0530 | [diff] [blame] | 375 | { |
| 376 | VirtIOBalloon *dev = opaque; |
zhanghailiang | 463756d | 2014-11-17 13:11:09 +0800 | [diff] [blame] | 377 | info->actual = get_current_ram_size() - ((uint64_t) dev->actual << |
| 378 | VIRTIO_BALLOON_PFN_SHIFT); |
Amit Shah | dce911c | 2011-07-20 13:19:07 +0530 | [diff] [blame] | 379 | } |
| 380 | |
Amit Shah | 30fb2ca | 2011-07-20 13:30:56 +0530 | [diff] [blame] | 381 | static void virtio_balloon_to_target(void *opaque, ram_addr_t target) |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 382 | { |
KONRAD Frederic | c96cace | 2013-03-27 10:49:14 +0100 | [diff] [blame] | 383 | VirtIOBalloon *dev = VIRTIO_BALLOON(opaque); |
| 384 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
zhanghailiang | 463756d | 2014-11-17 13:11:09 +0800 | [diff] [blame] | 385 | ram_addr_t vm_ram_size = get_current_ram_size(); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 386 | |
zhanghailiang | 463756d | 2014-11-17 13:11:09 +0800 | [diff] [blame] | 387 | if (target > vm_ram_size) { |
| 388 | target = vm_ram_size; |
Amit Shah | dce911c | 2011-07-20 13:19:07 +0530 | [diff] [blame] | 389 | } |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 390 | if (target) { |
zhanghailiang | 463756d | 2014-11-17 13:11:09 +0800 | [diff] [blame] | 391 | dev->num_pages = (vm_ram_size - target) >> VIRTIO_BALLOON_PFN_SHIFT; |
KONRAD Frederic | c96cace | 2013-03-27 10:49:14 +0100 | [diff] [blame] | 392 | virtio_notify_config(vdev); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 393 | } |
zhanghailiang | 6adfdc5 | 2014-11-17 13:11:10 +0800 | [diff] [blame] | 394 | trace_virtio_balloon_to_target(target, dev->num_pages); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 395 | } |
| 396 | |
Dr. David Alan Gilbert | 019518a | 2016-10-27 18:36:37 +0100 | [diff] [blame] | 397 | static int virtio_balloon_post_load_device(void *opaque, int version_id) |
Greg Kurz | 9ea2511 | 2014-06-24 19:20:08 +0200 | [diff] [blame] | 398 | { |
Dr. David Alan Gilbert | 019518a | 2016-10-27 18:36:37 +0100 | [diff] [blame] | 399 | VirtIOBalloon *s = VIRTIO_BALLOON(opaque); |
Pavel Butsykin | fecb48f | 2016-03-29 17:00:49 +0300 | [diff] [blame] | 400 | |
| 401 | if (balloon_stats_enabled(s)) { |
| 402 | balloon_stats_change_timer(s, s->stats_poll_interval); |
| 403 | } |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 404 | return 0; |
| 405 | } |
| 406 | |
Dr. David Alan Gilbert | 019518a | 2016-10-27 18:36:37 +0100 | [diff] [blame] | 407 | static const VMStateDescription vmstate_virtio_balloon_device = { |
| 408 | .name = "virtio-balloon-device", |
| 409 | .version_id = 1, |
| 410 | .minimum_version_id = 1, |
| 411 | .post_load = virtio_balloon_post_load_device, |
| 412 | .fields = (VMStateField[]) { |
| 413 | VMSTATE_UINT32(num_pages, VirtIOBalloon), |
| 414 | VMSTATE_UINT32(actual, VirtIOBalloon), |
| 415 | VMSTATE_END_OF_LIST() |
| 416 | }, |
| 417 | }; |
| 418 | |
Andreas Färber | 74def47 | 2013-07-30 02:51:37 +0200 | [diff] [blame] | 419 | static void virtio_balloon_device_realize(DeviceState *dev, Error **errp) |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 420 | { |
Andreas Färber | 74def47 | 2013-07-30 02:51:37 +0200 | [diff] [blame] | 421 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
Andreas Färber | a546fb1 | 2013-07-30 05:33:58 +0200 | [diff] [blame] | 422 | VirtIOBalloon *s = VIRTIO_BALLOON(dev); |
Amit Shah | f76f665 | 2011-07-27 12:29:33 +0530 | [diff] [blame] | 423 | int ret; |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 424 | |
Luiz Capitulino | e6baf61 | 2014-01-09 09:58:16 -0500 | [diff] [blame] | 425 | virtio_init(vdev, "virtio-balloon", VIRTIO_ID_BALLOON, |
| 426 | sizeof(struct virtio_balloon_config)); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 427 | |
Amit Shah | f76f665 | 2011-07-27 12:29:33 +0530 | [diff] [blame] | 428 | ret = qemu_add_balloon_handler(virtio_balloon_to_target, |
| 429 | virtio_balloon_stat, s); |
KONRAD Frederic | 5c7d096 | 2013-03-27 10:49:13 +0100 | [diff] [blame] | 430 | |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 431 | if (ret < 0) { |
Luiz Capitulino | 46abb81 | 2015-03-31 13:00:26 -0400 | [diff] [blame] | 432 | error_setg(errp, "Only one balloon device is supported"); |
Andreas Färber | a546fb1 | 2013-07-30 05:33:58 +0200 | [diff] [blame] | 433 | virtio_cleanup(vdev); |
Andreas Färber | 74def47 | 2013-07-30 02:51:37 +0200 | [diff] [blame] | 434 | return; |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 435 | } |
Amit Shah | f76f665 | 2011-07-27 12:29:33 +0530 | [diff] [blame] | 436 | |
KONRAD Frederic | 5c7d096 | 2013-03-27 10:49:13 +0100 | [diff] [blame] | 437 | s->ivq = virtio_add_queue(vdev, 128, virtio_balloon_handle_output); |
| 438 | s->dvq = virtio_add_queue(vdev, 128, virtio_balloon_handle_output); |
| 439 | s->svq = virtio_add_queue(vdev, 128, virtio_balloon_receive_stats); |
aliguori | bd32208 | 2008-12-04 20:33:06 +0000 | [diff] [blame] | 440 | |
Ján Tomko | 38dbd48 | 2014-05-21 11:03:47 +0200 | [diff] [blame] | 441 | reset_stats(s); |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 442 | } |
| 443 | |
Andreas Färber | 306ec6c | 2013-07-30 03:50:44 +0200 | [diff] [blame] | 444 | static void virtio_balloon_device_unrealize(DeviceState *dev, Error **errp) |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 445 | { |
Andreas Färber | 306ec6c | 2013-07-30 03:50:44 +0200 | [diff] [blame] | 446 | VirtIODevice *vdev = VIRTIO_DEVICE(dev); |
| 447 | VirtIOBalloon *s = VIRTIO_BALLOON(dev); |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 448 | |
| 449 | balloon_stats_destroy_timer(s); |
| 450 | qemu_remove_balloon_handler(s); |
KONRAD Frederic | 6a1a8cc | 2013-04-24 10:21:22 +0200 | [diff] [blame] | 451 | virtio_cleanup(vdev); |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 452 | } |
| 453 | |
Ladi Prosek | 4eae2a6 | 2016-03-01 12:14:03 +0100 | [diff] [blame] | 454 | static void virtio_balloon_device_reset(VirtIODevice *vdev) |
| 455 | { |
| 456 | VirtIOBalloon *s = VIRTIO_BALLOON(vdev); |
| 457 | |
| 458 | if (s->stats_vq_elem != NULL) { |
Ladi Prosek | 27e57ef | 2016-11-03 09:55:49 +0100 | [diff] [blame] | 459 | virtqueue_unpop(s->svq, s->stats_vq_elem, 0); |
Ladi Prosek | 4eae2a6 | 2016-03-01 12:14:03 +0100 | [diff] [blame] | 460 | g_free(s->stats_vq_elem); |
| 461 | s->stats_vq_elem = NULL; |
| 462 | } |
| 463 | } |
| 464 | |
Ladi Prosek | 4a1e48b | 2016-09-07 17:20:49 +0200 | [diff] [blame] | 465 | static void virtio_balloon_set_status(VirtIODevice *vdev, uint8_t status) |
| 466 | { |
| 467 | VirtIOBalloon *s = VIRTIO_BALLOON(vdev); |
| 468 | |
| 469 | if (!s->stats_vq_elem && vdev->vm_running && |
| 470 | (status & VIRTIO_CONFIG_S_DRIVER_OK) && virtqueue_rewind(s->svq, 1)) { |
| 471 | /* poll stats queue for the element we have discarded when the VM |
| 472 | * was stopped */ |
| 473 | virtio_balloon_receive_stats(vdev, s->svq); |
| 474 | } |
| 475 | } |
| 476 | |
Shannon Zhao | 1190044 | 2015-05-11 17:34:05 +0800 | [diff] [blame] | 477 | static void virtio_balloon_instance_init(Object *obj) |
| 478 | { |
| 479 | VirtIOBalloon *s = VIRTIO_BALLOON(obj); |
| 480 | |
| 481 | object_property_add(obj, "guest-stats", "guest statistics", |
| 482 | balloon_stats_get_all, NULL, NULL, s, NULL); |
| 483 | |
| 484 | object_property_add(obj, "guest-stats-polling-interval", "int", |
| 485 | balloon_stats_get_poll_interval, |
| 486 | balloon_stats_set_poll_interval, |
| 487 | NULL, s, NULL); |
| 488 | } |
| 489 | |
Halil Pasic | c5dc16b | 2016-10-06 14:55:47 +0200 | [diff] [blame] | 490 | static const VMStateDescription vmstate_virtio_balloon = { |
| 491 | .name = "virtio-balloon", |
| 492 | .minimum_version_id = 1, |
| 493 | .version_id = 1, |
| 494 | .fields = (VMStateField[]) { |
| 495 | VMSTATE_VIRTIO_DEVICE, |
| 496 | VMSTATE_END_OF_LIST() |
| 497 | }, |
| 498 | }; |
Dr. David Alan Gilbert | 7f1ca9b | 2016-07-14 18:22:49 +0100 | [diff] [blame] | 499 | |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 500 | static Property virtio_balloon_properties[] = { |
Denis V. Lunev | e381625 | 2015-06-15 13:52:52 +0300 | [diff] [blame] | 501 | DEFINE_PROP_BIT("deflate-on-oom", VirtIOBalloon, host_features, |
| 502 | VIRTIO_BALLOON_F_DEFLATE_ON_OOM, false), |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 503 | DEFINE_PROP_END_OF_LIST(), |
| 504 | }; |
| 505 | |
| 506 | static void virtio_balloon_class_init(ObjectClass *klass, void *data) |
| 507 | { |
| 508 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 509 | VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass); |
Andreas Färber | 74def47 | 2013-07-30 02:51:37 +0200 | [diff] [blame] | 510 | |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 511 | dc->props = virtio_balloon_properties; |
Dr. David Alan Gilbert | 7f1ca9b | 2016-07-14 18:22:49 +0100 | [diff] [blame] | 512 | dc->vmsd = &vmstate_virtio_balloon; |
Marcel Apfelbaum | 125ee0e | 2013-07-29 17:17:45 +0300 | [diff] [blame] | 513 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
Andreas Färber | 74def47 | 2013-07-30 02:51:37 +0200 | [diff] [blame] | 514 | vdc->realize = virtio_balloon_device_realize; |
Andreas Färber | 306ec6c | 2013-07-30 03:50:44 +0200 | [diff] [blame] | 515 | vdc->unrealize = virtio_balloon_device_unrealize; |
Ladi Prosek | 4eae2a6 | 2016-03-01 12:14:03 +0100 | [diff] [blame] | 516 | vdc->reset = virtio_balloon_device_reset; |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 517 | vdc->get_config = virtio_balloon_get_config; |
| 518 | vdc->set_config = virtio_balloon_set_config; |
| 519 | vdc->get_features = virtio_balloon_get_features; |
Ladi Prosek | 4a1e48b | 2016-09-07 17:20:49 +0200 | [diff] [blame] | 520 | vdc->set_status = virtio_balloon_set_status; |
Dr. David Alan Gilbert | 019518a | 2016-10-27 18:36:37 +0100 | [diff] [blame] | 521 | vdc->vmsd = &vmstate_virtio_balloon_device; |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 522 | } |
| 523 | |
| 524 | static const TypeInfo virtio_balloon_info = { |
| 525 | .name = TYPE_VIRTIO_BALLOON, |
| 526 | .parent = TYPE_VIRTIO_DEVICE, |
| 527 | .instance_size = sizeof(VirtIOBalloon), |
Shannon Zhao | 1190044 | 2015-05-11 17:34:05 +0800 | [diff] [blame] | 528 | .instance_init = virtio_balloon_instance_init, |
KONRAD Frederic | 1ab461b | 2013-03-27 10:49:10 +0100 | [diff] [blame] | 529 | .class_init = virtio_balloon_class_init, |
| 530 | }; |
| 531 | |
| 532 | static void virtio_register_types(void) |
| 533 | { |
| 534 | type_register_static(&virtio_balloon_info); |
| 535 | } |
| 536 | |
| 537 | type_init(virtio_register_types) |