Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 1 | /* |
| 2 | * KVM-based ITS implementation for a GICv3-based system |
| 3 | * |
| 4 | * Copyright (c) 2015 Samsung Electronics Co., Ltd. |
| 5 | * Written by Pavel Fedin <p.fedin@samsung.com> |
| 6 | * |
| 7 | * This library is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
Chetan Pant | 50f57e0 | 2020-10-23 12:29:13 +0000 | [diff] [blame] | 10 | * version 2.1 of the License, or (at your option) any later version. |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 11 | * |
| 12 | * This library is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| 19 | */ |
| 20 | |
| 21 | #include "qemu/osdep.h" |
| 22 | #include "qapi/error.h" |
Markus Armbruster | 0b8fa32 | 2019-05-23 16:35:07 +0200 | [diff] [blame] | 23 | #include "qemu/module.h" |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 24 | #include "hw/intc/arm_gicv3_its_common.h" |
Markus Armbruster | a27bd6c | 2019-08-12 07:23:51 +0200 | [diff] [blame] | 25 | #include "hw/qdev-properties.h" |
Markus Armbruster | 54d3123 | 2019-08-12 07:23:59 +0200 | [diff] [blame] | 26 | #include "sysemu/runstate.h" |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 27 | #include "sysemu/kvm.h" |
| 28 | #include "kvm_arm.h" |
Juan Quintela | 795c40b | 2017-04-06 12:00:28 +0200 | [diff] [blame] | 29 | #include "migration/blocker.h" |
Eduardo Habkost | db1015e | 2020-09-03 16:43:22 -0400 | [diff] [blame] | 30 | #include "qom/object.h" |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 31 | |
| 32 | #define TYPE_KVM_ARM_ITS "arm-its-kvm" |
Eduardo Habkost | db1015e | 2020-09-03 16:43:22 -0400 | [diff] [blame] | 33 | typedef struct KVMARMITSClass KVMARMITSClass; |
Eduardo Habkost | fa34a3c | 2020-08-31 17:07:36 -0400 | [diff] [blame] | 34 | /* This is reusing the GICv3ITSState typedef from ARM_GICV3_ITS_COMMON */ |
| 35 | DECLARE_OBJ_CHECKERS(GICv3ITSState, KVMARMITSClass, |
| 36 | KVM_ARM_ITS, TYPE_KVM_ARM_ITS) |
Eric Auger | c9aedf8 | 2017-12-13 17:59:22 +0000 | [diff] [blame] | 37 | |
Eduardo Habkost | db1015e | 2020-09-03 16:43:22 -0400 | [diff] [blame] | 38 | struct KVMARMITSClass { |
Eric Auger | c9aedf8 | 2017-12-13 17:59:22 +0000 | [diff] [blame] | 39 | GICv3ITSCommonClass parent_class; |
| 40 | void (*parent_reset)(DeviceState *dev); |
Eduardo Habkost | db1015e | 2020-09-03 16:43:22 -0400 | [diff] [blame] | 41 | }; |
Eric Auger | c9aedf8 | 2017-12-13 17:59:22 +0000 | [diff] [blame] | 42 | |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 43 | |
| 44 | static int kvm_its_send_msi(GICv3ITSState *s, uint32_t value, uint16_t devid) |
| 45 | { |
| 46 | struct kvm_msi msi; |
| 47 | |
| 48 | if (unlikely(!s->translater_gpa_known)) { |
| 49 | MemoryRegion *mr = &s->iomem_its_translation; |
| 50 | MemoryRegionSection mrs; |
| 51 | |
| 52 | mrs = memory_region_find(mr, 0, 1); |
| 53 | memory_region_unref(mrs.mr); |
| 54 | s->gits_translater_gpa = mrs.offset_within_address_space + 0x40; |
| 55 | s->translater_gpa_known = true; |
| 56 | } |
| 57 | |
| 58 | msi.address_lo = extract64(s->gits_translater_gpa, 0, 32); |
| 59 | msi.address_hi = extract64(s->gits_translater_gpa, 32, 32); |
| 60 | msi.data = le32_to_cpu(value); |
| 61 | msi.flags = KVM_MSI_VALID_DEVID; |
| 62 | msi.devid = devid; |
| 63 | memset(msi.pad, 0, sizeof(msi.pad)); |
| 64 | |
| 65 | return kvm_vm_ioctl(kvm_state, KVM_SIGNAL_MSI, &msi); |
| 66 | } |
| 67 | |
Eric Auger | cddafd8 | 2017-06-13 14:57:00 +0100 | [diff] [blame] | 68 | /** |
| 69 | * vm_change_state_handler - VM change state callback aiming at flushing |
| 70 | * ITS tables into guest RAM |
| 71 | * |
| 72 | * The tables get flushed to guest RAM whenever the VM gets stopped. |
| 73 | */ |
Philippe Mathieu-Daudé | 538f049 | 2021-01-11 16:20:20 +0100 | [diff] [blame] | 74 | static void vm_change_state_handler(void *opaque, bool running, |
Eric Auger | cddafd8 | 2017-06-13 14:57:00 +0100 | [diff] [blame] | 75 | RunState state) |
| 76 | { |
| 77 | GICv3ITSState *s = (GICv3ITSState *)opaque; |
| 78 | Error *err = NULL; |
Eric Auger | cddafd8 | 2017-06-13 14:57:00 +0100 | [diff] [blame] | 79 | |
| 80 | if (running) { |
| 81 | return; |
| 82 | } |
| 83 | |
Eric Auger | 8a7348b | 2017-11-07 13:03:52 +0000 | [diff] [blame] | 84 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, |
| 85 | KVM_DEV_ARM_ITS_SAVE_TABLES, NULL, true, &err); |
Eric Auger | cddafd8 | 2017-06-13 14:57:00 +0100 | [diff] [blame] | 86 | if (err) { |
| 87 | error_report_err(err); |
| 88 | } |
Eric Auger | cddafd8 | 2017-06-13 14:57:00 +0100 | [diff] [blame] | 89 | } |
| 90 | |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 91 | static void kvm_arm_its_realize(DeviceState *dev, Error **errp) |
| 92 | { |
| 93 | GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev); |
Ashijeet Acharya | fe44dc9 | 2017-01-16 17:01:53 +0530 | [diff] [blame] | 94 | |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 95 | s->dev_fd = kvm_create_device(kvm_state, KVM_DEV_TYPE_ARM_VGIC_ITS, false); |
| 96 | if (s->dev_fd < 0) { |
| 97 | error_setg_errno(errp, -s->dev_fd, "error creating in-kernel ITS"); |
| 98 | return; |
| 99 | } |
| 100 | |
| 101 | /* explicit init of the ITS */ |
| 102 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, |
Eric Auger | 556969e | 2017-06-13 14:57:00 +0100 | [diff] [blame] | 103 | KVM_DEV_ARM_VGIC_CTRL_INIT, NULL, true, &error_abort); |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 104 | |
| 105 | /* register the base address */ |
| 106 | kvm_arm_register_device(&s->iomem_its_cntrl, -1, KVM_DEV_ARM_VGIC_GRP_ADDR, |
Eric Auger | 19d1bd0 | 2018-06-22 13:28:35 +0100 | [diff] [blame] | 107 | KVM_VGIC_ITS_ADDR_TYPE, s->dev_fd, 0); |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 108 | |
| 109 | gicv3_its_init_mmio(s, NULL); |
| 110 | |
Eric Auger | 252a7a6 | 2017-06-13 14:57:01 +0100 | [diff] [blame] | 111 | if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 112 | GITS_CTLR)) { |
| 113 | error_setg(&s->migration_blocker, "This operating system kernel " |
| 114 | "does not support vITS migration"); |
Markus Armbruster | 386f6c0 | 2020-07-07 18:06:10 +0200 | [diff] [blame] | 115 | if (migrate_add_blocker(s->migration_blocker, errp) < 0) { |
Eric Auger | 252a7a6 | 2017-06-13 14:57:01 +0100 | [diff] [blame] | 116 | error_free(s->migration_blocker); |
| 117 | return; |
| 118 | } |
Shanker Donthineni | 3a575cd | 2017-11-07 13:03:51 +0000 | [diff] [blame] | 119 | } else { |
| 120 | qemu_add_vm_change_state_handler(vm_change_state_handler, s); |
Eric Auger | 252a7a6 | 2017-06-13 14:57:01 +0100 | [diff] [blame] | 121 | } |
| 122 | |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 123 | kvm_msi_use_devid = true; |
| 124 | kvm_gsi_direct_mapping = false; |
| 125 | kvm_msi_via_irqfd_allowed = kvm_irqfds_enabled(); |
| 126 | } |
| 127 | |
Eric Auger | cddafd8 | 2017-06-13 14:57:00 +0100 | [diff] [blame] | 128 | /** |
| 129 | * kvm_arm_its_pre_save - handles the saving of ITS registers. |
| 130 | * ITS tables are flushed into guest RAM separately and earlier, |
| 131 | * through the VM change state handler, since at the moment pre_save() |
| 132 | * is called, the guest RAM has already been saved. |
| 133 | */ |
| 134 | static void kvm_arm_its_pre_save(GICv3ITSState *s) |
| 135 | { |
| 136 | int i; |
| 137 | |
| 138 | for (i = 0; i < 8; i++) { |
| 139 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 140 | GITS_BASER + i * 8, &s->baser[i], false, |
| 141 | &error_abort); |
| 142 | } |
| 143 | |
| 144 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 145 | GITS_CTLR, &s->ctlr, false, &error_abort); |
| 146 | |
| 147 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 148 | GITS_CBASER, &s->cbaser, false, &error_abort); |
| 149 | |
| 150 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 151 | GITS_CREADR, &s->creadr, false, &error_abort); |
| 152 | |
| 153 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 154 | GITS_CWRITER, &s->cwriter, false, &error_abort); |
| 155 | |
| 156 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 157 | GITS_IIDR, &s->iidr, false, &error_abort); |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * kvm_arm_its_post_load - Restore both the ITS registers and tables |
| 162 | */ |
| 163 | static void kvm_arm_its_post_load(GICv3ITSState *s) |
| 164 | { |
| 165 | int i; |
| 166 | |
Eric Auger | cddafd8 | 2017-06-13 14:57:00 +0100 | [diff] [blame] | 167 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 168 | GITS_IIDR, &s->iidr, true, &error_abort); |
| 169 | |
| 170 | /* |
| 171 | * must be written before GITS_CREADR since GITS_CBASER write |
| 172 | * access resets GITS_CREADR. |
| 173 | */ |
| 174 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 175 | GITS_CBASER, &s->cbaser, true, &error_abort); |
| 176 | |
| 177 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 178 | GITS_CREADR, &s->creadr, true, &error_abort); |
| 179 | |
| 180 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 181 | GITS_CWRITER, &s->cwriter, true, &error_abort); |
| 182 | |
| 183 | |
| 184 | for (i = 0; i < 8; i++) { |
| 185 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 186 | GITS_BASER + i * 8, &s->baser[i], true, |
| 187 | &error_abort); |
| 188 | } |
| 189 | |
| 190 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, |
| 191 | KVM_DEV_ARM_ITS_RESTORE_TABLES, NULL, true, |
| 192 | &error_abort); |
| 193 | |
| 194 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 195 | GITS_CTLR, &s->ctlr, true, &error_abort); |
| 196 | } |
| 197 | |
Eric Auger | c9aedf8 | 2017-12-13 17:59:22 +0000 | [diff] [blame] | 198 | static void kvm_arm_its_reset(DeviceState *dev) |
| 199 | { |
| 200 | GICv3ITSState *s = ARM_GICV3_ITS_COMMON(dev); |
| 201 | KVMARMITSClass *c = KVM_ARM_ITS_GET_CLASS(s); |
| 202 | int i; |
| 203 | |
| 204 | c->parent_reset(dev); |
| 205 | |
Eric Auger | ba2aeca | 2017-12-13 17:59:23 +0000 | [diff] [blame] | 206 | if (kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, |
| 207 | KVM_DEV_ARM_ITS_CTRL_RESET)) { |
| 208 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_CTRL, |
| 209 | KVM_DEV_ARM_ITS_CTRL_RESET, NULL, true, &error_abort); |
| 210 | return; |
| 211 | } |
| 212 | |
Jia He | 84be3ef | 2018-08-20 11:24:31 +0100 | [diff] [blame] | 213 | warn_report("ITS KVM: full reset is not supported by the host kernel"); |
Eric Auger | c9aedf8 | 2017-12-13 17:59:22 +0000 | [diff] [blame] | 214 | |
| 215 | if (!kvm_device_check_attr(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 216 | GITS_CTLR)) { |
| 217 | return; |
| 218 | } |
| 219 | |
| 220 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 221 | GITS_CTLR, &s->ctlr, true, &error_abort); |
| 222 | |
| 223 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 224 | GITS_CBASER, &s->cbaser, true, &error_abort); |
| 225 | |
| 226 | for (i = 0; i < 8; i++) { |
| 227 | kvm_device_access(s->dev_fd, KVM_DEV_ARM_VGIC_GRP_ITS_REGS, |
| 228 | GITS_BASER + i * 8, &s->baser[i], true, |
| 229 | &error_abort); |
| 230 | } |
| 231 | } |
| 232 | |
Fam Zheng | 9ea26c7 | 2017-09-07 13:54:51 +0100 | [diff] [blame] | 233 | static Property kvm_arm_its_props[] = { |
| 234 | DEFINE_PROP_LINK("parent-gicv3", GICv3ITSState, gicv3, "kvm-arm-gicv3", |
| 235 | GICv3State *), |
| 236 | DEFINE_PROP_END_OF_LIST(), |
| 237 | }; |
| 238 | |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 239 | static void kvm_arm_its_class_init(ObjectClass *klass, void *data) |
| 240 | { |
| 241 | DeviceClass *dc = DEVICE_CLASS(klass); |
| 242 | GICv3ITSCommonClass *icc = ARM_GICV3_ITS_COMMON_CLASS(klass); |
Eric Auger | c9aedf8 | 2017-12-13 17:59:22 +0000 | [diff] [blame] | 243 | KVMARMITSClass *ic = KVM_ARM_ITS_CLASS(klass); |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 244 | |
| 245 | dc->realize = kvm_arm_its_realize; |
Marc-André Lureau | 4f67d30 | 2020-01-10 19:30:32 +0400 | [diff] [blame] | 246 | device_class_set_props(dc, kvm_arm_its_props); |
Philippe Mathieu-Daudé | bf85388 | 2018-01-13 23:04:12 -0300 | [diff] [blame] | 247 | device_class_set_parent_reset(dc, kvm_arm_its_reset, &ic->parent_reset); |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 248 | icc->send_msi = kvm_its_send_msi; |
Eric Auger | cddafd8 | 2017-06-13 14:57:00 +0100 | [diff] [blame] | 249 | icc->pre_save = kvm_arm_its_pre_save; |
| 250 | icc->post_load = kvm_arm_its_post_load; |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 251 | } |
| 252 | |
| 253 | static const TypeInfo kvm_arm_its_info = { |
| 254 | .name = TYPE_KVM_ARM_ITS, |
| 255 | .parent = TYPE_ARM_GICV3_ITS_COMMON, |
| 256 | .instance_size = sizeof(GICv3ITSState), |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 257 | .class_init = kvm_arm_its_class_init, |
Eric Auger | c9aedf8 | 2017-12-13 17:59:22 +0000 | [diff] [blame] | 258 | .class_size = sizeof(KVMARMITSClass), |
Pavel Fedin | 0c9f302 | 2016-10-04 13:28:09 +0100 | [diff] [blame] | 259 | }; |
| 260 | |
| 261 | static void kvm_arm_its_register_types(void) |
| 262 | { |
| 263 | type_register_static(&kvm_arm_its_info); |
| 264 | } |
| 265 | |
| 266 | type_init(kvm_arm_its_register_types) |