Christoffer Dall | 494b00c | 2013-03-05 00:34:41 +0000 | [diff] [blame] | 1 | /* |
| 2 | * ARM implementation of KVM hooks |
| 3 | * |
| 4 | * Copyright Christoffer Dall 2009-2010 |
| 5 | * |
| 6 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 7 | * See the COPYING file in the top-level directory. |
| 8 | * |
| 9 | */ |
| 10 | |
| 11 | #include <stdio.h> |
| 12 | #include <sys/types.h> |
| 13 | #include <sys/ioctl.h> |
| 14 | #include <sys/mman.h> |
| 15 | |
| 16 | #include <linux/kvm.h> |
| 17 | |
| 18 | #include "qemu-common.h" |
| 19 | #include "qemu/timer.h" |
| 20 | #include "sysemu/sysemu.h" |
| 21 | #include "sysemu/kvm.h" |
Peter Maydell | eb035b4 | 2013-03-05 00:34:42 +0000 | [diff] [blame] | 22 | #include "kvm_arm.h" |
Christoffer Dall | 494b00c | 2013-03-05 00:34:41 +0000 | [diff] [blame] | 23 | #include "cpu.h" |
Peter Maydell | bd2be15 | 2013-04-09 15:26:55 +0100 | [diff] [blame] | 24 | #include "hw/arm/arm.h" |
Christoffer Dall | 494b00c | 2013-03-05 00:34:41 +0000 | [diff] [blame] | 25 | |
| 26 | const KVMCapabilityInfo kvm_arch_required_capabilities[] = { |
| 27 | KVM_CAP_LAST_INFO |
| 28 | }; |
| 29 | |
Pranavkumar Sawargaonkar | 228d5e0 | 2014-06-19 18:06:26 +0100 | [diff] [blame] | 30 | int kvm_arm_vcpu_init(CPUState *cs) |
| 31 | { |
| 32 | ARMCPU *cpu = ARM_CPU(cs); |
| 33 | struct kvm_vcpu_init init; |
| 34 | |
| 35 | init.target = cpu->kvm_target; |
| 36 | memcpy(init.features, cpu->kvm_init_features, sizeof(init.features)); |
| 37 | |
| 38 | return kvm_vcpu_ioctl(cs, KVM_ARM_VCPU_INIT, &init); |
| 39 | } |
| 40 | |
Peter Maydell | a96c051 | 2013-11-22 17:17:17 +0000 | [diff] [blame] | 41 | bool kvm_arm_create_scratch_host_vcpu(const uint32_t *cpus_to_try, |
| 42 | int *fdarray, |
| 43 | struct kvm_vcpu_init *init) |
| 44 | { |
| 45 | int ret, kvmfd = -1, vmfd = -1, cpufd = -1; |
| 46 | |
| 47 | kvmfd = qemu_open("/dev/kvm", O_RDWR); |
| 48 | if (kvmfd < 0) { |
| 49 | goto err; |
| 50 | } |
| 51 | vmfd = ioctl(kvmfd, KVM_CREATE_VM, 0); |
| 52 | if (vmfd < 0) { |
| 53 | goto err; |
| 54 | } |
| 55 | cpufd = ioctl(vmfd, KVM_CREATE_VCPU, 0); |
| 56 | if (cpufd < 0) { |
| 57 | goto err; |
| 58 | } |
| 59 | |
| 60 | ret = ioctl(vmfd, KVM_ARM_PREFERRED_TARGET, init); |
| 61 | if (ret >= 0) { |
| 62 | ret = ioctl(cpufd, KVM_ARM_VCPU_INIT, init); |
| 63 | if (ret < 0) { |
| 64 | goto err; |
| 65 | } |
| 66 | } else { |
| 67 | /* Old kernel which doesn't know about the |
| 68 | * PREFERRED_TARGET ioctl: we know it will only support |
| 69 | * creating one kind of guest CPU which is its preferred |
| 70 | * CPU type. |
| 71 | */ |
| 72 | while (*cpus_to_try != QEMU_KVM_ARM_TARGET_NONE) { |
| 73 | init->target = *cpus_to_try++; |
| 74 | memset(init->features, 0, sizeof(init->features)); |
| 75 | ret = ioctl(cpufd, KVM_ARM_VCPU_INIT, init); |
| 76 | if (ret >= 0) { |
| 77 | break; |
| 78 | } |
| 79 | } |
| 80 | if (ret < 0) { |
| 81 | goto err; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | fdarray[0] = kvmfd; |
| 86 | fdarray[1] = vmfd; |
| 87 | fdarray[2] = cpufd; |
| 88 | |
| 89 | return true; |
| 90 | |
| 91 | err: |
| 92 | if (cpufd >= 0) { |
| 93 | close(cpufd); |
| 94 | } |
| 95 | if (vmfd >= 0) { |
| 96 | close(vmfd); |
| 97 | } |
| 98 | if (kvmfd >= 0) { |
| 99 | close(kvmfd); |
| 100 | } |
| 101 | |
| 102 | return false; |
| 103 | } |
| 104 | |
| 105 | void kvm_arm_destroy_scratch_host_vcpu(int *fdarray) |
| 106 | { |
| 107 | int i; |
| 108 | |
| 109 | for (i = 2; i >= 0; i--) { |
| 110 | close(fdarray[i]); |
| 111 | } |
| 112 | } |
| 113 | |
Peter Maydell | a96c051 | 2013-11-22 17:17:17 +0000 | [diff] [blame] | 114 | static void kvm_arm_host_cpu_class_init(ObjectClass *oc, void *data) |
| 115 | { |
| 116 | ARMHostCPUClass *ahcc = ARM_HOST_CPU_CLASS(oc); |
| 117 | |
| 118 | /* All we really need to set up for the 'host' CPU |
| 119 | * is the feature bits -- we rely on the fact that the |
| 120 | * various ID register values in ARMCPU are only used for |
| 121 | * TCG CPUs. |
| 122 | */ |
| 123 | if (!kvm_arm_get_host_cpu_features(ahcc)) { |
| 124 | fprintf(stderr, "Failed to retrieve host CPU features!\n"); |
| 125 | abort(); |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | static void kvm_arm_host_cpu_initfn(Object *obj) |
| 130 | { |
| 131 | ARMHostCPUClass *ahcc = ARM_HOST_CPU_GET_CLASS(obj); |
| 132 | ARMCPU *cpu = ARM_CPU(obj); |
| 133 | CPUARMState *env = &cpu->env; |
| 134 | |
| 135 | cpu->kvm_target = ahcc->target; |
| 136 | cpu->dtb_compatible = ahcc->dtb_compatible; |
| 137 | env->features = ahcc->features; |
| 138 | } |
| 139 | |
| 140 | static const TypeInfo host_arm_cpu_type_info = { |
| 141 | .name = TYPE_ARM_HOST_CPU, |
Mian M. Hamayun | 26861c7 | 2013-12-17 19:42:30 +0000 | [diff] [blame] | 142 | #ifdef TARGET_AARCH64 |
| 143 | .parent = TYPE_AARCH64_CPU, |
| 144 | #else |
Peter Maydell | a96c051 | 2013-11-22 17:17:17 +0000 | [diff] [blame] | 145 | .parent = TYPE_ARM_CPU, |
Mian M. Hamayun | 26861c7 | 2013-12-17 19:42:30 +0000 | [diff] [blame] | 146 | #endif |
Peter Maydell | a96c051 | 2013-11-22 17:17:17 +0000 | [diff] [blame] | 147 | .instance_init = kvm_arm_host_cpu_initfn, |
| 148 | .class_init = kvm_arm_host_cpu_class_init, |
| 149 | .class_size = sizeof(ARMHostCPUClass), |
| 150 | }; |
| 151 | |
Christoffer Dall | 494b00c | 2013-03-05 00:34:41 +0000 | [diff] [blame] | 152 | int kvm_arch_init(KVMState *s) |
| 153 | { |
| 154 | /* For ARM interrupt delivery is always asynchronous, |
| 155 | * whether we are using an in-kernel VGIC or not. |
| 156 | */ |
| 157 | kvm_async_interrupts_allowed = true; |
Peter Maydell | a96c051 | 2013-11-22 17:17:17 +0000 | [diff] [blame] | 158 | |
| 159 | type_register_static(&host_arm_cpu_type_info); |
| 160 | |
Christoffer Dall | 494b00c | 2013-03-05 00:34:41 +0000 | [diff] [blame] | 161 | return 0; |
| 162 | } |
| 163 | |
| 164 | unsigned long kvm_arch_vcpu_id(CPUState *cpu) |
| 165 | { |
| 166 | return cpu->cpu_index; |
| 167 | } |
| 168 | |
Peter Maydell | eb035b4 | 2013-03-05 00:34:42 +0000 | [diff] [blame] | 169 | /* We track all the KVM devices which need their memory addresses |
| 170 | * passing to the kernel in a list of these structures. |
| 171 | * When board init is complete we run through the list and |
| 172 | * tell the kernel the base addresses of the memory regions. |
| 173 | * We use a MemoryListener to track mapping and unmapping of |
| 174 | * the regions during board creation, so the board models don't |
| 175 | * need to do anything special for the KVM case. |
| 176 | */ |
| 177 | typedef struct KVMDevice { |
| 178 | struct kvm_arm_device_addr kda; |
Christoffer Dall | 1da41cc | 2014-02-26 17:20:00 +0000 | [diff] [blame] | 179 | struct kvm_device_attr kdattr; |
Peter Maydell | eb035b4 | 2013-03-05 00:34:42 +0000 | [diff] [blame] | 180 | MemoryRegion *mr; |
| 181 | QSLIST_ENTRY(KVMDevice) entries; |
Christoffer Dall | 1da41cc | 2014-02-26 17:20:00 +0000 | [diff] [blame] | 182 | int dev_fd; |
Peter Maydell | eb035b4 | 2013-03-05 00:34:42 +0000 | [diff] [blame] | 183 | } KVMDevice; |
| 184 | |
| 185 | static QSLIST_HEAD(kvm_devices_head, KVMDevice) kvm_devices_head; |
| 186 | |
| 187 | static void kvm_arm_devlistener_add(MemoryListener *listener, |
| 188 | MemoryRegionSection *section) |
| 189 | { |
| 190 | KVMDevice *kd; |
| 191 | |
| 192 | QSLIST_FOREACH(kd, &kvm_devices_head, entries) { |
| 193 | if (section->mr == kd->mr) { |
| 194 | kd->kda.addr = section->offset_within_address_space; |
| 195 | } |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | static void kvm_arm_devlistener_del(MemoryListener *listener, |
| 200 | MemoryRegionSection *section) |
| 201 | { |
| 202 | KVMDevice *kd; |
| 203 | |
| 204 | QSLIST_FOREACH(kd, &kvm_devices_head, entries) { |
| 205 | if (section->mr == kd->mr) { |
| 206 | kd->kda.addr = -1; |
| 207 | } |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | static MemoryListener devlistener = { |
| 212 | .region_add = kvm_arm_devlistener_add, |
| 213 | .region_del = kvm_arm_devlistener_del, |
| 214 | }; |
| 215 | |
Christoffer Dall | 1da41cc | 2014-02-26 17:20:00 +0000 | [diff] [blame] | 216 | static void kvm_arm_set_device_addr(KVMDevice *kd) |
| 217 | { |
| 218 | struct kvm_device_attr *attr = &kd->kdattr; |
| 219 | int ret; |
| 220 | |
| 221 | /* If the device control API is available and we have a device fd on the |
| 222 | * KVMDevice struct, let's use the newer API |
| 223 | */ |
| 224 | if (kd->dev_fd >= 0) { |
| 225 | uint64_t addr = kd->kda.addr; |
| 226 | attr->addr = (uintptr_t)&addr; |
| 227 | ret = kvm_device_ioctl(kd->dev_fd, KVM_SET_DEVICE_ATTR, attr); |
| 228 | } else { |
| 229 | ret = kvm_vm_ioctl(kvm_state, KVM_ARM_SET_DEVICE_ADDR, &kd->kda); |
| 230 | } |
| 231 | |
| 232 | if (ret < 0) { |
| 233 | fprintf(stderr, "Failed to set device address: %s\n", |
| 234 | strerror(-ret)); |
| 235 | abort(); |
| 236 | } |
| 237 | } |
| 238 | |
Peter Maydell | eb035b4 | 2013-03-05 00:34:42 +0000 | [diff] [blame] | 239 | static void kvm_arm_machine_init_done(Notifier *notifier, void *data) |
| 240 | { |
| 241 | KVMDevice *kd, *tkd; |
| 242 | |
| 243 | memory_listener_unregister(&devlistener); |
| 244 | QSLIST_FOREACH_SAFE(kd, &kvm_devices_head, entries, tkd) { |
| 245 | if (kd->kda.addr != -1) { |
Christoffer Dall | 1da41cc | 2014-02-26 17:20:00 +0000 | [diff] [blame] | 246 | kvm_arm_set_device_addr(kd); |
Peter Maydell | eb035b4 | 2013-03-05 00:34:42 +0000 | [diff] [blame] | 247 | } |
Paolo Bonzini | dfde4e6 | 2013-05-06 10:46:11 +0200 | [diff] [blame] | 248 | memory_region_unref(kd->mr); |
Peter Maydell | eb035b4 | 2013-03-05 00:34:42 +0000 | [diff] [blame] | 249 | g_free(kd); |
| 250 | } |
| 251 | } |
| 252 | |
| 253 | static Notifier notify = { |
| 254 | .notify = kvm_arm_machine_init_done, |
| 255 | }; |
| 256 | |
Christoffer Dall | 1da41cc | 2014-02-26 17:20:00 +0000 | [diff] [blame] | 257 | void kvm_arm_register_device(MemoryRegion *mr, uint64_t devid, uint64_t group, |
| 258 | uint64_t attr, int dev_fd) |
Peter Maydell | eb035b4 | 2013-03-05 00:34:42 +0000 | [diff] [blame] | 259 | { |
| 260 | KVMDevice *kd; |
| 261 | |
| 262 | if (!kvm_irqchip_in_kernel()) { |
| 263 | return; |
| 264 | } |
| 265 | |
| 266 | if (QSLIST_EMPTY(&kvm_devices_head)) { |
| 267 | memory_listener_register(&devlistener, NULL); |
| 268 | qemu_add_machine_init_done_notifier(¬ify); |
| 269 | } |
| 270 | kd = g_new0(KVMDevice, 1); |
| 271 | kd->mr = mr; |
| 272 | kd->kda.id = devid; |
| 273 | kd->kda.addr = -1; |
Christoffer Dall | 1da41cc | 2014-02-26 17:20:00 +0000 | [diff] [blame] | 274 | kd->kdattr.flags = 0; |
| 275 | kd->kdattr.group = group; |
| 276 | kd->kdattr.attr = attr; |
| 277 | kd->dev_fd = dev_fd; |
Peter Maydell | eb035b4 | 2013-03-05 00:34:42 +0000 | [diff] [blame] | 278 | QSLIST_INSERT_HEAD(&kvm_devices_head, kd, entries); |
Paolo Bonzini | dfde4e6 | 2013-05-06 10:46:11 +0200 | [diff] [blame] | 279 | memory_region_ref(kd->mr); |
Peter Maydell | eb035b4 | 2013-03-05 00:34:42 +0000 | [diff] [blame] | 280 | } |
| 281 | |
Peter Maydell | ff04745 | 2013-06-25 18:16:07 +0100 | [diff] [blame] | 282 | bool write_kvmstate_to_list(ARMCPU *cpu) |
| 283 | { |
| 284 | CPUState *cs = CPU(cpu); |
| 285 | int i; |
| 286 | bool ok = true; |
| 287 | |
| 288 | for (i = 0; i < cpu->cpreg_array_len; i++) { |
| 289 | struct kvm_one_reg r; |
| 290 | uint64_t regidx = cpu->cpreg_indexes[i]; |
| 291 | uint32_t v32; |
| 292 | int ret; |
| 293 | |
| 294 | r.id = regidx; |
| 295 | |
| 296 | switch (regidx & KVM_REG_SIZE_MASK) { |
| 297 | case KVM_REG_SIZE_U32: |
| 298 | r.addr = (uintptr_t)&v32; |
| 299 | ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &r); |
| 300 | if (!ret) { |
| 301 | cpu->cpreg_values[i] = v32; |
| 302 | } |
| 303 | break; |
| 304 | case KVM_REG_SIZE_U64: |
| 305 | r.addr = (uintptr_t)(cpu->cpreg_values + i); |
| 306 | ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &r); |
| 307 | break; |
| 308 | default: |
| 309 | abort(); |
| 310 | } |
| 311 | if (ret) { |
| 312 | ok = false; |
| 313 | } |
| 314 | } |
| 315 | return ok; |
| 316 | } |
| 317 | |
| 318 | bool write_list_to_kvmstate(ARMCPU *cpu) |
| 319 | { |
| 320 | CPUState *cs = CPU(cpu); |
| 321 | int i; |
| 322 | bool ok = true; |
| 323 | |
| 324 | for (i = 0; i < cpu->cpreg_array_len; i++) { |
| 325 | struct kvm_one_reg r; |
| 326 | uint64_t regidx = cpu->cpreg_indexes[i]; |
| 327 | uint32_t v32; |
| 328 | int ret; |
| 329 | |
| 330 | r.id = regidx; |
| 331 | switch (regidx & KVM_REG_SIZE_MASK) { |
| 332 | case KVM_REG_SIZE_U32: |
| 333 | v32 = cpu->cpreg_values[i]; |
| 334 | r.addr = (uintptr_t)&v32; |
| 335 | break; |
| 336 | case KVM_REG_SIZE_U64: |
| 337 | r.addr = (uintptr_t)(cpu->cpreg_values + i); |
| 338 | break; |
| 339 | default: |
| 340 | abort(); |
| 341 | } |
| 342 | ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &r); |
| 343 | if (ret) { |
| 344 | /* We might fail for "unknown register" and also for |
| 345 | * "you tried to set a register which is constant with |
| 346 | * a different value from what it actually contains". |
| 347 | */ |
| 348 | ok = false; |
| 349 | } |
| 350 | } |
| 351 | return ok; |
| 352 | } |
| 353 | |
Christoffer Dall | 494b00c | 2013-03-05 00:34:41 +0000 | [diff] [blame] | 354 | void kvm_arch_pre_run(CPUState *cs, struct kvm_run *run) |
| 355 | { |
| 356 | } |
| 357 | |
| 358 | void kvm_arch_post_run(CPUState *cs, struct kvm_run *run) |
| 359 | { |
| 360 | } |
| 361 | |
| 362 | int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) |
| 363 | { |
| 364 | return 0; |
| 365 | } |
| 366 | |
Christoffer Dall | 494b00c | 2013-03-05 00:34:41 +0000 | [diff] [blame] | 367 | bool kvm_arch_stop_on_emulation_error(CPUState *cs) |
| 368 | { |
| 369 | return true; |
| 370 | } |
| 371 | |
| 372 | int kvm_arch_process_async_events(CPUState *cs) |
| 373 | { |
| 374 | return 0; |
| 375 | } |
| 376 | |
| 377 | int kvm_arch_on_sigbus_vcpu(CPUState *cs, int code, void *addr) |
| 378 | { |
| 379 | return 1; |
| 380 | } |
| 381 | |
| 382 | int kvm_arch_on_sigbus(int code, void *addr) |
| 383 | { |
| 384 | return 1; |
| 385 | } |
| 386 | |
| 387 | void kvm_arch_update_guest_debug(CPUState *cs, struct kvm_guest_debug *dbg) |
| 388 | { |
| 389 | qemu_log_mask(LOG_UNIMP, "%s: not implemented\n", __func__); |
| 390 | } |
| 391 | |
| 392 | int kvm_arch_insert_sw_breakpoint(CPUState *cs, |
| 393 | struct kvm_sw_breakpoint *bp) |
| 394 | { |
| 395 | qemu_log_mask(LOG_UNIMP, "%s: not implemented\n", __func__); |
| 396 | return -EINVAL; |
| 397 | } |
| 398 | |
| 399 | int kvm_arch_insert_hw_breakpoint(target_ulong addr, |
| 400 | target_ulong len, int type) |
| 401 | { |
| 402 | qemu_log_mask(LOG_UNIMP, "%s: not implemented\n", __func__); |
| 403 | return -EINVAL; |
| 404 | } |
| 405 | |
| 406 | int kvm_arch_remove_hw_breakpoint(target_ulong addr, |
| 407 | target_ulong len, int type) |
| 408 | { |
| 409 | qemu_log_mask(LOG_UNIMP, "%s: not implemented\n", __func__); |
| 410 | return -EINVAL; |
| 411 | } |
| 412 | |
| 413 | int kvm_arch_remove_sw_breakpoint(CPUState *cs, |
| 414 | struct kvm_sw_breakpoint *bp) |
| 415 | { |
| 416 | qemu_log_mask(LOG_UNIMP, "%s: not implemented\n", __func__); |
| 417 | return -EINVAL; |
| 418 | } |
| 419 | |
| 420 | void kvm_arch_remove_all_hw_breakpoints(void) |
| 421 | { |
| 422 | qemu_log_mask(LOG_UNIMP, "%s: not implemented\n", __func__); |
| 423 | } |
Alexey Kardashevskiy | b3a1c62 | 2013-06-12 17:26:52 +1000 | [diff] [blame] | 424 | |
| 425 | void kvm_arch_init_irq_routing(KVMState *s) |
| 426 | { |
| 427 | } |
Christoffer Dall | 1da41cc | 2014-02-26 17:20:00 +0000 | [diff] [blame] | 428 | |
| 429 | int kvm_arch_irqchip_create(KVMState *s) |
| 430 | { |
| 431 | int ret; |
| 432 | |
| 433 | /* If we can create the VGIC using the newer device control API, we |
| 434 | * let the device do this when it initializes itself, otherwise we |
| 435 | * fall back to the old API */ |
| 436 | |
| 437 | ret = kvm_create_device(s, KVM_DEV_TYPE_ARM_VGIC_V2, true); |
| 438 | if (ret == 0) { |
| 439 | return 1; |
| 440 | } |
| 441 | |
| 442 | return 0; |
| 443 | } |