target/i386/machine.c

   1 #include "qemu/osdep.h"
   2 #include "qemu-common.h"
   3 #include "cpu.h"
   4 #include "exec/exec-all.h"
   5 #include "hw/hw.h"
   6 #include "hw/boards.h"
   7 #include "hw/i386/pc.h"
   8 #include "hw/isa/isa.h"
   9 #include "migration/cpu.h"
  10
  11 #include "sysemu/kvm.h"
  12
  13 #include "qemu/error-report.h"
  14
  15 static const VMStateDescription vmstate_segment = {
  16     .name = "segment",
  17     .version_id = 1,
  18     .minimum_version_id = 1,
  19     .fields = (VMStateField[]) {
  20         VMSTATE_UINT32(selector, SegmentCache),
  21         VMSTATE_UINTTL(base, SegmentCache),
  22         VMSTATE_UINT32(limit, SegmentCache),
  23         VMSTATE_UINT32(flags, SegmentCache),
  24         VMSTATE_END_OF_LIST()
  25     }
  26 };
  27
  28 #define VMSTATE_SEGMENT(_field, _state) {                            \
  29     .name       = (stringify(_field)),                               \
  30     .size       = sizeof(SegmentCache),                              \
  31     .vmsd       = &vmstate_segment,                                  \
  32     .flags      = VMS_STRUCT,                                        \
  33     .offset     = offsetof(_state, _field)                           \
  34             + type_check(SegmentCache,typeof_field(_state, _field))  \
  35 }
  36
  37 #define VMSTATE_SEGMENT_ARRAY(_field, _state, _n)                    \
  38     VMSTATE_STRUCT_ARRAY(_field, _state, _n, 0, vmstate_segment, SegmentCache)
  39
  40 static const VMStateDescription vmstate_xmm_reg = {
  41     .name = "xmm_reg",
  42     .version_id = 1,
  43     .minimum_version_id = 1,
  44     .fields = (VMStateField[]) {
  45         VMSTATE_UINT64(ZMM_Q(0), ZMMReg),
  46         VMSTATE_UINT64(ZMM_Q(1), ZMMReg),
  47         VMSTATE_END_OF_LIST()
  48     }
  49 };
  50
  51 #define VMSTATE_XMM_REGS(_field, _state, _start)                         \
  52     VMSTATE_STRUCT_SUB_ARRAY(_field, _state, _start, CPU_NB_REGS, 0,     \
  53                              vmstate_xmm_reg, ZMMReg)
  54
  55 /* YMMH format is the same as XMM, but for bits 128-255 */
  56 static const VMStateDescription vmstate_ymmh_reg = {
  57     .name = "ymmh_reg",
  58     .version_id = 1,
  59     .minimum_version_id = 1,
  60     .fields = (VMStateField[]) {
  61         VMSTATE_UINT64(ZMM_Q(2), ZMMReg),
  62         VMSTATE_UINT64(ZMM_Q(3), ZMMReg),
  63         VMSTATE_END_OF_LIST()
  64     }
  65 };
  66
  67 #define VMSTATE_YMMH_REGS_VARS(_field, _state, _start, _v)               \
  68     VMSTATE_STRUCT_SUB_ARRAY(_field, _state, _start, CPU_NB_REGS, _v,    \
  69                              vmstate_ymmh_reg, ZMMReg)
  70
  71 static const VMStateDescription vmstate_zmmh_reg = {
  72     .name = "zmmh_reg",
  73     .version_id = 1,
  74     .minimum_version_id = 1,
  75     .fields = (VMStateField[]) {
  76         VMSTATE_UINT64(ZMM_Q(4), ZMMReg),
  77         VMSTATE_UINT64(ZMM_Q(5), ZMMReg),
  78         VMSTATE_UINT64(ZMM_Q(6), ZMMReg),
  79         VMSTATE_UINT64(ZMM_Q(7), ZMMReg),
  80         VMSTATE_END_OF_LIST()
  81     }
  82 };
  83
  84 #define VMSTATE_ZMMH_REGS_VARS(_field, _state, _start)                   \
  85     VMSTATE_STRUCT_SUB_ARRAY(_field, _state, _start, CPU_NB_REGS, 0,     \
  86                              vmstate_zmmh_reg, ZMMReg)
  87
  88 #ifdef TARGET_X86_64
  89 static const VMStateDescription vmstate_hi16_zmm_reg = {
  90     .name = "hi16_zmm_reg",
  91     .version_id = 1,
  92     .minimum_version_id = 1,
  93     .fields = (VMStateField[]) {
  94         VMSTATE_UINT64(ZMM_Q(0), ZMMReg),
  95         VMSTATE_UINT64(ZMM_Q(1), ZMMReg),
  96         VMSTATE_UINT64(ZMM_Q(2), ZMMReg),
  97         VMSTATE_UINT64(ZMM_Q(3), ZMMReg),
  98         VMSTATE_UINT64(ZMM_Q(4), ZMMReg),
  99         VMSTATE_UINT64(ZMM_Q(5), ZMMReg),
 100         VMSTATE_UINT64(ZMM_Q(6), ZMMReg),
 101         VMSTATE_UINT64(ZMM_Q(7), ZMMReg),
 102         VMSTATE_END_OF_LIST()
 103     }
 104 };
 105
 106 #define VMSTATE_Hi16_ZMM_REGS_VARS(_field, _state, _start)               \
 107     VMSTATE_STRUCT_SUB_ARRAY(_field, _state, _start, CPU_NB_REGS, 0,     \
 108                              vmstate_hi16_zmm_reg, ZMMReg)
 109 #endif
 110
 111 static const VMStateDescription vmstate_bnd_regs = {
 112     .name = "bnd_regs",
 113     .version_id = 1,
 114     .minimum_version_id = 1,
 115     .fields = (VMStateField[]) {
 116         VMSTATE_UINT64(lb, BNDReg),
 117         VMSTATE_UINT64(ub, BNDReg),
 118         VMSTATE_END_OF_LIST()
 119     }
 120 };
 121
 122 #define VMSTATE_BND_REGS(_field, _state, _n)          \
 123     VMSTATE_STRUCT_ARRAY(_field, _state, _n, 0, vmstate_bnd_regs, BNDReg)
 124
 125 static const VMStateDescription vmstate_mtrr_var = {
 126     .name = "mtrr_var",
 127     .version_id = 1,
 128     .minimum_version_id = 1,
 129     .fields = (VMStateField[]) {
 130         VMSTATE_UINT64(base, MTRRVar),
 131         VMSTATE_UINT64(mask, MTRRVar),
 132         VMSTATE_END_OF_LIST()
 133     }
 134 };
 135
 136 #define VMSTATE_MTRR_VARS(_field, _state, _n, _v)                    \
 137     VMSTATE_STRUCT_ARRAY(_field, _state, _n, _v, vmstate_mtrr_var, MTRRVar)
 138
 139 typedef struct x86_FPReg_tmp {
 140     FPReg *parent;
 141     uint64_t tmp_mant;
 142     uint16_t tmp_exp;
 143 } x86_FPReg_tmp;
 144
 145 static void cpu_get_fp80(uint64_t *pmant, uint16_t *pexp, floatx80 f)
 146 {
 147     CPU_LDoubleU temp;
 148
 149     temp.d = f;
 150     *pmant = temp.l.lower;
 151     *pexp = temp.l.upper;
 152 }
 153
 154 static floatx80 cpu_set_fp80(uint64_t mant, uint16_t upper)
 155 {
 156     CPU_LDoubleU temp;
 157
 158     temp.l.upper = upper;
 159     temp.l.lower = mant;
 160     return temp.d;
 161 }
 162
 163 static int fpreg_pre_save(void *opaque)
 164 {
 165     x86_FPReg_tmp *tmp = opaque;
 166
 167     /* we save the real CPU data (in case of MMX usage only 'mant'
 168        contains the MMX register */
 169     cpu_get_fp80(&tmp->tmp_mant, &tmp->tmp_exp, tmp->parent->d);
 170
 171     return 0;
 172 }
 173
 174 static int fpreg_post_load(void *opaque, int version)
 175 {
 176     x86_FPReg_tmp *tmp = opaque;
 177
 178     tmp->parent->d = cpu_set_fp80(tmp->tmp_mant, tmp->tmp_exp);
 179     return 0;
 180 }
 181
 182 static const VMStateDescription vmstate_fpreg_tmp = {
 183     .name = "fpreg_tmp",
 184     .post_load = fpreg_post_load,
 185     .pre_save  = fpreg_pre_save,
 186     .fields = (VMStateField[]) {
 187         VMSTATE_UINT64(tmp_mant, x86_FPReg_tmp),
 188         VMSTATE_UINT16(tmp_exp, x86_FPReg_tmp),
 189         VMSTATE_END_OF_LIST()
 190     }
 191 };
 192
 193 static const VMStateDescription vmstate_fpreg = {
 194     .name = "fpreg",
 195     .fields = (VMStateField[]) {
 196         VMSTATE_WITH_TMP(FPReg, x86_FPReg_tmp, vmstate_fpreg_tmp),
 197         VMSTATE_END_OF_LIST()
 198     }
 199 };
 200
 201 static int cpu_pre_save(void *opaque)
 202 {
 203     X86CPU *cpu = opaque;
 204     CPUX86State *env = &cpu->env;
 205     int i;
 206
 207     /* FPU */
 208     env->fpus_vmstate = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
 209     env->fptag_vmstate = 0;
 210     for(i = 0; i < 8; i++) {
 211         env->fptag_vmstate |= ((!env->fptags[i]) << i);
 212     }
 213
 214     env->fpregs_format_vmstate = 0;
 215
 216     /*
 217      * Real mode guest segments register DPL should be zero.
 218      * Older KVM version were setting it wrongly.
 219      * Fixing it will allow live migration to host with unrestricted guest
 220      * support (otherwise the migration will fail with invalid guest state
 221      * error).
 222      */
 223     if (!(env->cr[0] & CR0_PE_MASK) &&
 224         (env->segs[R_CS].flags >> DESC_DPL_SHIFT & 3) != 0) {
 225         env->segs[R_CS].flags &= ~(env->segs[R_CS].flags & DESC_DPL_MASK);
 226         env->segs[R_DS].flags &= ~(env->segs[R_DS].flags & DESC_DPL_MASK);
 227         env->segs[R_ES].flags &= ~(env->segs[R_ES].flags & DESC_DPL_MASK);
 228         env->segs[R_FS].flags &= ~(env->segs[R_FS].flags & DESC_DPL_MASK);
 229         env->segs[R_GS].flags &= ~(env->segs[R_GS].flags & DESC_DPL_MASK);
 230         env->segs[R_SS].flags &= ~(env->segs[R_SS].flags & DESC_DPL_MASK);
 231     }
 232
 233     return 0;
 234 }
 235
 236 static int cpu_post_load(void *opaque, int version_id)
 237 {
 238     X86CPU *cpu = opaque;
 239     CPUState *cs = CPU(cpu);
 240     CPUX86State *env = &cpu->env;
 241     int i;
 242
 243     if (env->tsc_khz && env->user_tsc_khz &&
 244         env->tsc_khz != env->user_tsc_khz) {
 245         error_report("Mismatch between user-specified TSC frequency and "
 246                      "migrated TSC frequency");
 247         return -EINVAL;
 248     }
 249
 250     if (env->fpregs_format_vmstate) {
 251         error_report("Unsupported old non-softfloat CPU state");
 252         return -EINVAL;
 253     }
 254     /*
 255      * Real mode guest segments register DPL should be zero.
 256      * Older KVM version were setting it wrongly.
 257      * Fixing it will allow live migration from such host that don't have
 258      * restricted guest support to a host with unrestricted guest support
 259      * (otherwise the migration will fail with invalid guest state
 260      * error).
 261      */
 262     if (!(env->cr[0] & CR0_PE_MASK) &&
 263         (env->segs[R_CS].flags >> DESC_DPL_SHIFT & 3) != 0) {
 264         env->segs[R_CS].flags &= ~(env->segs[R_CS].flags & DESC_DPL_MASK);
 265         env->segs[R_DS].flags &= ~(env->segs[R_DS].flags & DESC_DPL_MASK);
 266         env->segs[R_ES].flags &= ~(env->segs[R_ES].flags & DESC_DPL_MASK);
 267         env->segs[R_FS].flags &= ~(env->segs[R_FS].flags & DESC_DPL_MASK);
 268         env->segs[R_GS].flags &= ~(env->segs[R_GS].flags & DESC_DPL_MASK);
 269         env->segs[R_SS].flags &= ~(env->segs[R_SS].flags & DESC_DPL_MASK);
 270     }
 271
 272     /* Older versions of QEMU incorrectly used CS.DPL as the CPL when
 273      * running under KVM.  This is wrong for conforming code segments.
 274      * Luckily, in our implementation the CPL field of hflags is redundant
 275      * and we can get the right value from the SS descriptor privilege level.
 276      */
 277     env->hflags &= ~HF_CPL_MASK;
 278     env->hflags |= (env->segs[R_SS].flags >> DESC_DPL_SHIFT) & HF_CPL_MASK;
 279
 280     env->fpstt = (env->fpus_vmstate >> 11) & 7;
 281     env->fpus = env->fpus_vmstate & ~0x3800;
 282     env->fptag_vmstate ^= 0xff;
 283     for(i = 0; i < 8; i++) {
 284         env->fptags[i] = (env->fptag_vmstate >> i) & 1;
 285     }
 286     if (tcg_enabled()) {
 287         target_ulong dr7;
 288         update_fp_status(env);
 289         update_mxcsr_status(env);
 290
 291         cpu_breakpoint_remove_all(cs, BP_CPU);
 292         cpu_watchpoint_remove_all(cs, BP_CPU);
 293
 294         /* Indicate all breakpoints disabled, as they are, then
 295            let the helper re-enable them.  */
 296         dr7 = env->dr[7];
 297         env->dr[7] = dr7 & ~(DR7_GLOBAL_BP_MASK | DR7_LOCAL_BP_MASK);
 298         cpu_x86_update_dr7(env, dr7);
 299     }
 300     tlb_flush(cs);
 301     return 0;
 302 }
 303
 304 static bool async_pf_msr_needed(void *opaque)
 305 {
 306     X86CPU *cpu = opaque;
 307
 308     return cpu->env.async_pf_en_msr != 0;
 309 }
 310
 311 static bool pv_eoi_msr_needed(void *opaque)
 312 {
 313     X86CPU *cpu = opaque;
 314
 315     return cpu->env.pv_eoi_en_msr != 0;
 316 }
 317
 318 static bool steal_time_msr_needed(void *opaque)
 319 {
 320     X86CPU *cpu = opaque;
 321
 322     return cpu->env.steal_time_msr != 0;
 323 }
 324
 325 static const VMStateDescription vmstate_steal_time_msr = {
 326     .name = "cpu/steal_time_msr",
 327     .version_id = 1,
 328     .minimum_version_id = 1,
 329     .needed = steal_time_msr_needed,
 330     .fields = (VMStateField[]) {
 331         VMSTATE_UINT64(env.steal_time_msr, X86CPU),
 332         VMSTATE_END_OF_LIST()
 333     }
 334 };
 335
 336 static const VMStateDescription vmstate_async_pf_msr = {
 337     .name = "cpu/async_pf_msr",
 338     .version_id = 1,
 339     .minimum_version_id = 1,
 340     .needed = async_pf_msr_needed,
 341     .fields = (VMStateField[]) {
 342         VMSTATE_UINT64(env.async_pf_en_msr, X86CPU),
 343         VMSTATE_END_OF_LIST()
 344     }
 345 };
 346
 347 static const VMStateDescription vmstate_pv_eoi_msr = {
 348     .name = "cpu/async_pv_eoi_msr",
 349     .version_id = 1,
 350     .minimum_version_id = 1,
 351     .needed = pv_eoi_msr_needed,
 352     .fields = (VMStateField[]) {
 353         VMSTATE_UINT64(env.pv_eoi_en_msr, X86CPU),
 354         VMSTATE_END_OF_LIST()
 355     }
 356 };
 357
 358 static bool fpop_ip_dp_needed(void *opaque)
 359 {
 360     X86CPU *cpu = opaque;
 361     CPUX86State *env = &cpu->env;
 362
 363     return env->fpop != 0 || env->fpip != 0 || env->fpdp != 0;
 364 }
 365
 366 static const VMStateDescription vmstate_fpop_ip_dp = {
 367     .name = "cpu/fpop_ip_dp",
 368     .version_id = 1,
 369     .minimum_version_id = 1,
 370     .needed = fpop_ip_dp_needed,
 371     .fields = (VMStateField[]) {
 372         VMSTATE_UINT16(env.fpop, X86CPU),
 373         VMSTATE_UINT64(env.fpip, X86CPU),
 374         VMSTATE_UINT64(env.fpdp, X86CPU),
 375         VMSTATE_END_OF_LIST()
 376     }
 377 };
 378
 379 static bool tsc_adjust_needed(void *opaque)
 380 {
 381     X86CPU *cpu = opaque;
 382     CPUX86State *env = &cpu->env;
 383
 384     return env->tsc_adjust != 0;
 385 }
 386
 387 static const VMStateDescription vmstate_msr_tsc_adjust = {
 388     .name = "cpu/msr_tsc_adjust",
 389     .version_id = 1,
 390     .minimum_version_id = 1,
 391     .needed = tsc_adjust_needed,
 392     .fields = (VMStateField[]) {
 393         VMSTATE_UINT64(env.tsc_adjust, X86CPU),
 394         VMSTATE_END_OF_LIST()
 395     }
 396 };
 397
 398 static bool tscdeadline_needed(void *opaque)
 399 {
 400     X86CPU *cpu = opaque;
 401     CPUX86State *env = &cpu->env;
 402
 403     return env->tsc_deadline != 0;
 404 }
 405
 406 static const VMStateDescription vmstate_msr_tscdeadline = {
 407     .name = "cpu/msr_tscdeadline",
 408     .version_id = 1,
 409     .minimum_version_id = 1,
 410     .needed = tscdeadline_needed,
 411     .fields = (VMStateField[]) {
 412         VMSTATE_UINT64(env.tsc_deadline, X86CPU),
 413         VMSTATE_END_OF_LIST()
 414     }
 415 };
 416
 417 static bool misc_enable_needed(void *opaque)
 418 {
 419     X86CPU *cpu = opaque;
 420     CPUX86State *env = &cpu->env;
 421
 422     return env->msr_ia32_misc_enable != MSR_IA32_MISC_ENABLE_DEFAULT;
 423 }
 424
 425 static bool feature_control_needed(void *opaque)
 426 {
 427     X86CPU *cpu = opaque;
 428     CPUX86State *env = &cpu->env;
 429
 430     return env->msr_ia32_feature_control != 0;
 431 }
 432
 433 static const VMStateDescription vmstate_msr_ia32_misc_enable = {
 434     .name = "cpu/msr_ia32_misc_enable",
 435     .version_id = 1,
 436     .minimum_version_id = 1,
 437     .needed = misc_enable_needed,
 438     .fields = (VMStateField[]) {
 439         VMSTATE_UINT64(env.msr_ia32_misc_enable, X86CPU),
 440         VMSTATE_END_OF_LIST()
 441     }
 442 };
 443
 444 static const VMStateDescription vmstate_msr_ia32_feature_control = {
 445     .name = "cpu/msr_ia32_feature_control",
 446     .version_id = 1,
 447     .minimum_version_id = 1,
 448     .needed = feature_control_needed,
 449     .fields = (VMStateField[]) {
 450         VMSTATE_UINT64(env.msr_ia32_feature_control, X86CPU),
 451         VMSTATE_END_OF_LIST()
 452     }
 453 };
 454
 455 static bool pmu_enable_needed(void *opaque)
 456 {
 457     X86CPU *cpu = opaque;
 458     CPUX86State *env = &cpu->env;
 459     int i;
 460
 461     if (env->msr_fixed_ctr_ctrl || env->msr_global_ctrl ||
 462         env->msr_global_status || env->msr_global_ovf_ctrl) {
 463         return true;
 464     }
 465     for (i = 0; i < MAX_FIXED_COUNTERS; i++) {
 466         if (env->msr_fixed_counters[i]) {
 467             return true;
 468         }
 469     }
 470     for (i = 0; i < MAX_GP_COUNTERS; i++) {
 471         if (env->msr_gp_counters[i] || env->msr_gp_evtsel[i]) {
 472             return true;
 473         }
 474     }
 475
 476     return false;
 477 }
 478
 479 static const VMStateDescription vmstate_msr_architectural_pmu = {
 480     .name = "cpu/msr_architectural_pmu",
 481     .version_id = 1,
 482     .minimum_version_id = 1,
 483     .needed = pmu_enable_needed,
 484     .fields = (VMStateField[]) {
 485         VMSTATE_UINT64(env.msr_fixed_ctr_ctrl, X86CPU),
 486         VMSTATE_UINT64(env.msr_global_ctrl, X86CPU),
 487         VMSTATE_UINT64(env.msr_global_status, X86CPU),
 488         VMSTATE_UINT64(env.msr_global_ovf_ctrl, X86CPU),
 489         VMSTATE_UINT64_ARRAY(env.msr_fixed_counters, X86CPU, MAX_FIXED_COUNTERS),
 490         VMSTATE_UINT64_ARRAY(env.msr_gp_counters, X86CPU, MAX_GP_COUNTERS),
 491         VMSTATE_UINT64_ARRAY(env.msr_gp_evtsel, X86CPU, MAX_GP_COUNTERS),
 492         VMSTATE_END_OF_LIST()
 493     }
 494 };
 495
 496 static bool mpx_needed(void *opaque)
 497 {
 498     X86CPU *cpu = opaque;
 499     CPUX86State *env = &cpu->env;
 500     unsigned int i;
 501
 502     for (i = 0; i < 4; i++) {
 503         if (env->bnd_regs[i].lb || env->bnd_regs[i].ub) {
 504             return true;
 505         }
 506     }
 507
 508     if (env->bndcs_regs.cfgu || env->bndcs_regs.sts) {
 509         return true;
 510     }
 511
 512     return !!env->msr_bndcfgs;
 513 }
 514
 515 static const VMStateDescription vmstate_mpx = {
 516     .name = "cpu/mpx",
 517     .version_id = 1,
 518     .minimum_version_id = 1,
 519     .needed = mpx_needed,
 520     .fields = (VMStateField[]) {
 521         VMSTATE_BND_REGS(env.bnd_regs, X86CPU, 4),
 522         VMSTATE_UINT64(env.bndcs_regs.cfgu, X86CPU),
 523         VMSTATE_UINT64(env.bndcs_regs.sts, X86CPU),
 524         VMSTATE_UINT64(env.msr_bndcfgs, X86CPU),
 525         VMSTATE_END_OF_LIST()
 526     }
 527 };
 528
 529 static bool hyperv_hypercall_enable_needed(void *opaque)
 530 {
 531     X86CPU *cpu = opaque;
 532     CPUX86State *env = &cpu->env;
 533
 534     return env->msr_hv_hypercall != 0 || env->msr_hv_guest_os_id != 0;
 535 }
 536
 537 static const VMStateDescription vmstate_msr_hypercall_hypercall = {
 538     .name = "cpu/msr_hyperv_hypercall",
 539     .version_id = 1,
 540     .minimum_version_id = 1,
 541     .needed = hyperv_hypercall_enable_needed,
 542     .fields = (VMStateField[]) {
 543         VMSTATE_UINT64(env.msr_hv_guest_os_id, X86CPU),
 544         VMSTATE_UINT64(env.msr_hv_hypercall, X86CPU),
 545         VMSTATE_END_OF_LIST()
 546     }
 547 };
 548
 549 static bool hyperv_vapic_enable_needed(void *opaque)
 550 {
 551     X86CPU *cpu = opaque;
 552     CPUX86State *env = &cpu->env;
 553
 554     return env->msr_hv_vapic != 0;
 555 }
 556
 557 static const VMStateDescription vmstate_msr_hyperv_vapic = {
 558     .name = "cpu/msr_hyperv_vapic",
 559     .version_id = 1,
 560     .minimum_version_id = 1,
 561     .needed = hyperv_vapic_enable_needed,
 562     .fields = (VMStateField[]) {
 563         VMSTATE_UINT64(env.msr_hv_vapic, X86CPU),
 564         VMSTATE_END_OF_LIST()
 565     }
 566 };
 567
 568 static bool hyperv_time_enable_needed(void *opaque)
 569 {
 570     X86CPU *cpu = opaque;
 571     CPUX86State *env = &cpu->env;
 572
 573     return env->msr_hv_tsc != 0;
 574 }
 575
 576 static const VMStateDescription vmstate_msr_hyperv_time = {
 577     .name = "cpu/msr_hyperv_time",
 578     .version_id = 1,
 579     .minimum_version_id = 1,
 580     .needed = hyperv_time_enable_needed,
 581     .fields = (VMStateField[]) {
 582         VMSTATE_UINT64(env.msr_hv_tsc, X86CPU),
 583         VMSTATE_END_OF_LIST()
 584     }
 585 };
 586
 587 static bool hyperv_crash_enable_needed(void *opaque)
 588 {
 589     X86CPU *cpu = opaque;
 590     CPUX86State *env = &cpu->env;
 591     int i;
 592
 593     for (i = 0; i < HV_CRASH_PARAMS; i++) {
 594         if (env->msr_hv_crash_params[i]) {
 595             return true;
 596         }
 597     }
 598     return false;
 599 }
 600
 601 static const VMStateDescription vmstate_msr_hyperv_crash = {
 602     .name = "cpu/msr_hyperv_crash",
 603     .version_id = 1,
 604     .minimum_version_id = 1,
 605     .needed = hyperv_crash_enable_needed,
 606     .fields = (VMStateField[]) {
 607         VMSTATE_UINT64_ARRAY(env.msr_hv_crash_params, X86CPU, HV_CRASH_PARAMS),
 608         VMSTATE_END_OF_LIST()
 609     }
 610 };
 611
 612 static bool hyperv_runtime_enable_needed(void *opaque)
 613 {
 614     X86CPU *cpu = opaque;
 615     CPUX86State *env = &cpu->env;
 616
 617     if (!cpu->hyperv_runtime) {
 618         return false;
 619     }
 620
 621     return env->msr_hv_runtime != 0;
 622 }
 623
 624 static const VMStateDescription vmstate_msr_hyperv_runtime = {
 625     .name = "cpu/msr_hyperv_runtime",
 626     .version_id = 1,
 627     .minimum_version_id = 1,
 628     .needed = hyperv_runtime_enable_needed,
 629     .fields = (VMStateField[]) {
 630         VMSTATE_UINT64(env.msr_hv_runtime, X86CPU),
 631         VMSTATE_END_OF_LIST()
 632     }
 633 };
 634
 635 static bool hyperv_synic_enable_needed(void *opaque)
 636 {
 637     X86CPU *cpu = opaque;
 638     CPUX86State *env = &cpu->env;
 639     int i;
 640
 641     if (env->msr_hv_synic_control != 0 ||
 642         env->msr_hv_synic_evt_page != 0 ||
 643         env->msr_hv_synic_msg_page != 0) {
 644         return true;
 645     }
 646
 647     for (i = 0; i < ARRAY_SIZE(env->msr_hv_synic_sint); i++) {
 648         if (env->msr_hv_synic_sint[i] != 0) {
 649             return true;
 650         }
 651     }
 652
 653     return false;
 654 }
 655
 656 static const VMStateDescription vmstate_msr_hyperv_synic = {
 657     .name = "cpu/msr_hyperv_synic",
 658     .version_id = 1,
 659     .minimum_version_id = 1,
 660     .needed = hyperv_synic_enable_needed,
 661     .fields = (VMStateField[]) {
 662         VMSTATE_UINT64(env.msr_hv_synic_control, X86CPU),
 663         VMSTATE_UINT64(env.msr_hv_synic_evt_page, X86CPU),
 664         VMSTATE_UINT64(env.msr_hv_synic_msg_page, X86CPU),
 665         VMSTATE_UINT64_ARRAY(env.msr_hv_synic_sint, X86CPU, HV_SINT_COUNT),
 666         VMSTATE_END_OF_LIST()
 667     }
 668 };
 669
 670 static bool hyperv_stimer_enable_needed(void *opaque)
 671 {
 672     X86CPU *cpu = opaque;
 673     CPUX86State *env = &cpu->env;
 674     int i;
 675
 676     for (i = 0; i < ARRAY_SIZE(env->msr_hv_stimer_config); i++) {
 677         if (env->msr_hv_stimer_config[i] || env->msr_hv_stimer_count[i]) {
 678             return true;
 679         }
 680     }
 681     return false;
 682 }
 683
 684 static const VMStateDescription vmstate_msr_hyperv_stimer = {
 685     .name = "cpu/msr_hyperv_stimer",
 686     .version_id = 1,
 687     .minimum_version_id = 1,
 688     .needed = hyperv_stimer_enable_needed,
 689     .fields = (VMStateField[]) {
 690         VMSTATE_UINT64_ARRAY(env.msr_hv_stimer_config, X86CPU,
 691                              HV_STIMER_COUNT),
 692         VMSTATE_UINT64_ARRAY(env.msr_hv_stimer_count, X86CPU, HV_STIMER_COUNT),
 693         VMSTATE_END_OF_LIST()
 694     }
 695 };
 696
 697 static bool avx512_needed(void *opaque)
 698 {
 699     X86CPU *cpu = opaque;
 700     CPUX86State *env = &cpu->env;
 701     unsigned int i;
 702
 703     for (i = 0; i < NB_OPMASK_REGS; i++) {
 704         if (env->opmask_regs[i]) {
 705             return true;
 706         }
 707     }
 708
 709     for (i = 0; i < CPU_NB_REGS; i++) {
 710 #define ENV_XMM(reg, field) (env->xmm_regs[reg].ZMM_Q(field))
 711         if (ENV_XMM(i, 4) || ENV_XMM(i, 6) ||
 712             ENV_XMM(i, 5) || ENV_XMM(i, 7)) {
 713             return true;
 714         }
 715 #ifdef TARGET_X86_64
 716         if (ENV_XMM(i+16, 0) || ENV_XMM(i+16, 1) ||
 717             ENV_XMM(i+16, 2) || ENV_XMM(i+16, 3) ||
 718             ENV_XMM(i+16, 4) || ENV_XMM(i+16, 5) ||
 719             ENV_XMM(i+16, 6) || ENV_XMM(i+16, 7)) {
 720             return true;
 721         }
 722 #endif
 723     }
 724
 725     return false;
 726 }
 727
 728 static const VMStateDescription vmstate_avx512 = {
 729     .name = "cpu/avx512",
 730     .version_id = 1,
 731     .minimum_version_id = 1,
 732     .needed = avx512_needed,
 733     .fields = (VMStateField[]) {
 734         VMSTATE_UINT64_ARRAY(env.opmask_regs, X86CPU, NB_OPMASK_REGS),
 735         VMSTATE_ZMMH_REGS_VARS(env.xmm_regs, X86CPU, 0),
 736 #ifdef TARGET_X86_64
 737         VMSTATE_Hi16_ZMM_REGS_VARS(env.xmm_regs, X86CPU, 16),
 738 #endif
 739         VMSTATE_END_OF_LIST()
 740     }
 741 };
 742
 743 static bool xss_needed(void *opaque)
 744 {
 745     X86CPU *cpu = opaque;
 746     CPUX86State *env = &cpu->env;
 747
 748     return env->xss != 0;
 749 }
 750
 751 static const VMStateDescription vmstate_xss = {
 752     .name = "cpu/xss",
 753     .version_id = 1,
 754     .minimum_version_id = 1,
 755     .needed = xss_needed,
 756     .fields = (VMStateField[]) {
 757         VMSTATE_UINT64(env.xss, X86CPU),
 758         VMSTATE_END_OF_LIST()
 759     }
 760 };
 761
 762 #ifdef TARGET_X86_64
 763 static bool pkru_needed(void *opaque)
 764 {
 765     X86CPU *cpu = opaque;
 766     CPUX86State *env = &cpu->env;
 767
 768     return env->pkru != 0;
 769 }
 770
 771 static const VMStateDescription vmstate_pkru = {
 772     .name = "cpu/pkru",
 773     .version_id = 1,
 774     .minimum_version_id = 1,
 775     .needed = pkru_needed,
 776     .fields = (VMStateField[]){
 777         VMSTATE_UINT32(env.pkru, X86CPU),
 778         VMSTATE_END_OF_LIST()
 779     }
 780 };
 781 #endif
 782
 783 static bool tsc_khz_needed(void *opaque)
 784 {
 785     X86CPU *cpu = opaque;
 786     CPUX86State *env = &cpu->env;
 787     MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
 788     PCMachineClass *pcmc = PC_MACHINE_CLASS(mc);
 789     return env->tsc_khz && pcmc->save_tsc_khz;
 790 }
 791
 792 static const VMStateDescription vmstate_tsc_khz = {
 793     .name = "cpu/tsc_khz",
 794     .version_id = 1,
 795     .minimum_version_id = 1,
 796     .needed = tsc_khz_needed,
 797     .fields = (VMStateField[]) {
 798         VMSTATE_INT64(env.tsc_khz, X86CPU),
 799         VMSTATE_END_OF_LIST()
 800     }
 801 };
 802
 803 static bool mcg_ext_ctl_needed(void *opaque)
 804 {
 805     X86CPU *cpu = opaque;
 806     CPUX86State *env = &cpu->env;
 807     return cpu->enable_lmce && env->mcg_ext_ctl;
 808 }
 809
 810 static const VMStateDescription vmstate_mcg_ext_ctl = {
 811     .name = "cpu/mcg_ext_ctl",
 812     .version_id = 1,
 813     .minimum_version_id = 1,
 814     .needed = mcg_ext_ctl_needed,
 815     .fields = (VMStateField[]) {
 816         VMSTATE_UINT64(env.mcg_ext_ctl, X86CPU),
 817         VMSTATE_END_OF_LIST()
 818     }
 819 };
 820
 821 VMStateDescription vmstate_x86_cpu = {
 822     .name = "cpu",
 823     .version_id = 12,
 824     .minimum_version_id = 11,
 825     .pre_save = cpu_pre_save,
 826     .post_load = cpu_post_load,
 827     .fields = (VMStateField[]) {
 828         VMSTATE_UINTTL_ARRAY(env.regs, X86CPU, CPU_NB_REGS),
 829         VMSTATE_UINTTL(env.eip, X86CPU),
 830         VMSTATE_UINTTL(env.eflags, X86CPU),
 831         VMSTATE_UINT32(env.hflags, X86CPU),
 832         /* FPU */
 833         VMSTATE_UINT16(env.fpuc, X86CPU),
 834         VMSTATE_UINT16(env.fpus_vmstate, X86CPU),
 835         VMSTATE_UINT16(env.fptag_vmstate, X86CPU),
 836         VMSTATE_UINT16(env.fpregs_format_vmstate, X86CPU),
 837
 838         VMSTATE_STRUCT_ARRAY(env.fpregs, X86CPU, 8, 0, vmstate_fpreg, FPReg),
 839
 840         VMSTATE_SEGMENT_ARRAY(env.segs, X86CPU, 6),
 841         VMSTATE_SEGMENT(env.ldt, X86CPU),
 842         VMSTATE_SEGMENT(env.tr, X86CPU),
 843         VMSTATE_SEGMENT(env.gdt, X86CPU),
 844         VMSTATE_SEGMENT(env.idt, X86CPU),
 845
 846         VMSTATE_UINT32(env.sysenter_cs, X86CPU),
 847         VMSTATE_UINTTL(env.sysenter_esp, X86CPU),
 848         VMSTATE_UINTTL(env.sysenter_eip, X86CPU),
 849
 850         VMSTATE_UINTTL(env.cr[0], X86CPU),
 851         VMSTATE_UINTTL(env.cr[2], X86CPU),
 852         VMSTATE_UINTTL(env.cr[3], X86CPU),
 853         VMSTATE_UINTTL(env.cr[4], X86CPU),
 854         VMSTATE_UINTTL_ARRAY(env.dr, X86CPU, 8),
 855         /* MMU */
 856         VMSTATE_INT32(env.a20_mask, X86CPU),
 857         /* XMM */
 858         VMSTATE_UINT32(env.mxcsr, X86CPU),
 859         VMSTATE_XMM_REGS(env.xmm_regs, X86CPU, 0),
 860
 861 #ifdef TARGET_X86_64
 862         VMSTATE_UINT64(env.efer, X86CPU),
 863         VMSTATE_UINT64(env.star, X86CPU),
 864         VMSTATE_UINT64(env.lstar, X86CPU),
 865         VMSTATE_UINT64(env.cstar, X86CPU),
 866         VMSTATE_UINT64(env.fmask, X86CPU),
 867         VMSTATE_UINT64(env.kernelgsbase, X86CPU),
 868 #endif
 869         VMSTATE_UINT32(env.smbase, X86CPU),
 870
 871         VMSTATE_UINT64(env.pat, X86CPU),
 872         VMSTATE_UINT32(env.hflags2, X86CPU),
 873
 874         VMSTATE_UINT64(env.vm_hsave, X86CPU),
 875         VMSTATE_UINT64(env.vm_vmcb, X86CPU),
 876         VMSTATE_UINT64(env.tsc_offset, X86CPU),
 877         VMSTATE_UINT64(env.intercept, X86CPU),
 878         VMSTATE_UINT16(env.intercept_cr_read, X86CPU),
 879         VMSTATE_UINT16(env.intercept_cr_write, X86CPU),
 880         VMSTATE_UINT16(env.intercept_dr_read, X86CPU),
 881         VMSTATE_UINT16(env.intercept_dr_write, X86CPU),
 882         VMSTATE_UINT32(env.intercept_exceptions, X86CPU),
 883         VMSTATE_UINT8(env.v_tpr, X86CPU),
 884         /* MTRRs */
 885         VMSTATE_UINT64_ARRAY(env.mtrr_fixed, X86CPU, 11),
 886         VMSTATE_UINT64(env.mtrr_deftype, X86CPU),
 887         VMSTATE_MTRR_VARS(env.mtrr_var, X86CPU, MSR_MTRRcap_VCNT, 8),
 888         /* KVM-related states */
 889         VMSTATE_INT32(env.interrupt_injected, X86CPU),
 890         VMSTATE_UINT32(env.mp_state, X86CPU),
 891         VMSTATE_UINT64(env.tsc, X86CPU),
 892         VMSTATE_INT32(env.exception_injected, X86CPU),
 893         VMSTATE_UINT8(env.soft_interrupt, X86CPU),
 894         VMSTATE_UINT8(env.nmi_injected, X86CPU),
 895         VMSTATE_UINT8(env.nmi_pending, X86CPU),
 896         VMSTATE_UINT8(env.has_error_code, X86CPU),
 897         VMSTATE_UINT32(env.sipi_vector, X86CPU),
 898         /* MCE */
 899         VMSTATE_UINT64(env.mcg_cap, X86CPU),
 900         VMSTATE_UINT64(env.mcg_status, X86CPU),
 901         VMSTATE_UINT64(env.mcg_ctl, X86CPU),
 902         VMSTATE_UINT64_ARRAY(env.mce_banks, X86CPU, MCE_BANKS_DEF * 4),
 903         /* rdtscp */
 904         VMSTATE_UINT64(env.tsc_aux, X86CPU),
 905         /* KVM pvclock msr */
 906         VMSTATE_UINT64(env.system_time_msr, X86CPU),
 907         VMSTATE_UINT64(env.wall_clock_msr, X86CPU),
 908         /* XSAVE related fields */
 909         VMSTATE_UINT64_V(env.xcr0, X86CPU, 12),
 910         VMSTATE_UINT64_V(env.xstate_bv, X86CPU, 12),
 911         VMSTATE_YMMH_REGS_VARS(env.xmm_regs, X86CPU, 0, 12),
 912         VMSTATE_END_OF_LIST()
 913         /* The above list is not sorted /wrt version numbers, watch out! */
 914     },
 915     .subsections = (const VMStateDescription*[]) {
 916         &vmstate_async_pf_msr,
 917         &vmstate_pv_eoi_msr,
 918         &vmstate_steal_time_msr,
 919         &vmstate_fpop_ip_dp,
 920         &vmstate_msr_tsc_adjust,
 921         &vmstate_msr_tscdeadline,
 922         &vmstate_msr_ia32_misc_enable,
 923         &vmstate_msr_ia32_feature_control,
 924         &vmstate_msr_architectural_pmu,
 925         &vmstate_mpx,
 926         &vmstate_msr_hypercall_hypercall,
 927         &vmstate_msr_hyperv_vapic,
 928         &vmstate_msr_hyperv_time,
 929         &vmstate_msr_hyperv_crash,
 930         &vmstate_msr_hyperv_runtime,
 931         &vmstate_msr_hyperv_synic,
 932         &vmstate_msr_hyperv_stimer,
 933         &vmstate_avx512,
 934         &vmstate_xss,
 935         &vmstate_tsc_khz,
 936 #ifdef TARGET_X86_64
 937         &vmstate_pkru,
 938 #endif
 939         &vmstate_mcg_ext_ctl,
 940         NULL
 941     }
 942 };