target/arm/machine.c

   1 #include "qemu/osdep.h"
   2 #include "cpu.h"
   3 #include "qemu/error-report.h"
   4 #include "sysemu/kvm.h"
   5 #include "kvm_arm.h"
   6 #include "internals.h"
   7 #include "migration/cpu.h"
   8
   9 static bool vfp_needed(void *opaque)
  10 {
  11     ARMCPU *cpu = opaque;
  12
  13     return (arm_feature(&cpu->env, ARM_FEATURE_AARCH64)
  14             ? cpu_isar_feature(aa64_fp_simd, cpu)
  15             : cpu_isar_feature(aa32_vfp_simd, cpu));
  16 }
  17
  18 static int get_fpscr(QEMUFile *f, void *opaque, size_t size,
  19                      const VMStateField *field)
  20 {
  21     ARMCPU *cpu = opaque;
  22     CPUARMState *env = &cpu->env;
  23     uint32_t val = qemu_get_be32(f);
  24
  25     vfp_set_fpscr(env, val);
  26     return 0;
  27 }
  28
  29 static int put_fpscr(QEMUFile *f, void *opaque, size_t size,
  30                      const VMStateField *field, JSONWriter *vmdesc)
  31 {
  32     ARMCPU *cpu = opaque;
  33     CPUARMState *env = &cpu->env;
  34
  35     qemu_put_be32(f, vfp_get_fpscr(env));
  36     return 0;
  37 }
  38
  39 static const VMStateInfo vmstate_fpscr = {
  40     .name = "fpscr",
  41     .get = get_fpscr,
  42     .put = put_fpscr,
  43 };
  44
  45 static const VMStateDescription vmstate_vfp = {
  46     .name = "cpu/vfp",
  47     .version_id = 3,
  48     .minimum_version_id = 3,
  49     .needed = vfp_needed,
  50     .fields = (VMStateField[]) {
  51         /* For compatibility, store Qn out of Zn here.  */
  52         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[0].d, ARMCPU, 0, 2),
  53         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[1].d, ARMCPU, 0, 2),
  54         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[2].d, ARMCPU, 0, 2),
  55         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[3].d, ARMCPU, 0, 2),
  56         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[4].d, ARMCPU, 0, 2),
  57         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[5].d, ARMCPU, 0, 2),
  58         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[6].d, ARMCPU, 0, 2),
  59         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[7].d, ARMCPU, 0, 2),
  60         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[8].d, ARMCPU, 0, 2),
  61         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[9].d, ARMCPU, 0, 2),
  62         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[10].d, ARMCPU, 0, 2),
  63         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[11].d, ARMCPU, 0, 2),
  64         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[12].d, ARMCPU, 0, 2),
  65         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[13].d, ARMCPU, 0, 2),
  66         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[14].d, ARMCPU, 0, 2),
  67         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[15].d, ARMCPU, 0, 2),
  68         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[16].d, ARMCPU, 0, 2),
  69         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[17].d, ARMCPU, 0, 2),
  70         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[18].d, ARMCPU, 0, 2),
  71         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[19].d, ARMCPU, 0, 2),
  72         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[20].d, ARMCPU, 0, 2),
  73         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[21].d, ARMCPU, 0, 2),
  74         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[22].d, ARMCPU, 0, 2),
  75         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[23].d, ARMCPU, 0, 2),
  76         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[24].d, ARMCPU, 0, 2),
  77         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[25].d, ARMCPU, 0, 2),
  78         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[26].d, ARMCPU, 0, 2),
  79         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[27].d, ARMCPU, 0, 2),
  80         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[28].d, ARMCPU, 0, 2),
  81         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[29].d, ARMCPU, 0, 2),
  82         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[30].d, ARMCPU, 0, 2),
  83         VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[31].d, ARMCPU, 0, 2),
  84
  85         /* The xregs array is a little awkward because element 1 (FPSCR)
  86          * requires a specific accessor, so we have to split it up in
  87          * the vmstate:
  88          */
  89         VMSTATE_UINT32(env.vfp.xregs[0], ARMCPU),
  90         VMSTATE_UINT32_SUB_ARRAY(env.vfp.xregs, ARMCPU, 2, 14),
  91         {
  92             .name = "fpscr",
  93             .version_id = 0,
  94             .size = sizeof(uint32_t),
  95             .info = &vmstate_fpscr,
  96             .flags = VMS_SINGLE,
  97             .offset = 0,
  98         },
  99         VMSTATE_END_OF_LIST()
 100     }
 101 };
 102
 103 static bool iwmmxt_needed(void *opaque)
 104 {
 105     ARMCPU *cpu = opaque;
 106     CPUARMState *env = &cpu->env;
 107
 108     return arm_feature(env, ARM_FEATURE_IWMMXT);
 109 }
 110
 111 static const VMStateDescription vmstate_iwmmxt = {
 112     .name = "cpu/iwmmxt",
 113     .version_id = 1,
 114     .minimum_version_id = 1,
 115     .needed = iwmmxt_needed,
 116     .fields = (VMStateField[]) {
 117         VMSTATE_UINT64_ARRAY(env.iwmmxt.regs, ARMCPU, 16),
 118         VMSTATE_UINT32_ARRAY(env.iwmmxt.cregs, ARMCPU, 16),
 119         VMSTATE_END_OF_LIST()
 120     }
 121 };
 122
 123 #ifdef TARGET_AARCH64
 124 /* The expression ARM_MAX_VQ - 2 is 0 for pure AArch32 build,
 125  * and ARMPredicateReg is actively empty.  This triggers errors
 126  * in the expansion of the VMSTATE macros.
 127  */
 128
 129 static bool sve_needed(void *opaque)
 130 {
 131     ARMCPU *cpu = opaque;
 132
 133     return cpu_isar_feature(aa64_sve, cpu);
 134 }
 135
 136 /* The first two words of each Zreg is stored in VFP state.  */
 137 static const VMStateDescription vmstate_zreg_hi_reg = {
 138     .name = "cpu/sve/zreg_hi",
 139     .version_id = 1,
 140     .minimum_version_id = 1,
 141     .fields = (VMStateField[]) {
 142         VMSTATE_UINT64_SUB_ARRAY(d, ARMVectorReg, 2, ARM_MAX_VQ - 2),
 143         VMSTATE_END_OF_LIST()
 144     }
 145 };
 146
 147 static const VMStateDescription vmstate_preg_reg = {
 148     .name = "cpu/sve/preg",
 149     .version_id = 1,
 150     .minimum_version_id = 1,
 151     .fields = (VMStateField[]) {
 152         VMSTATE_UINT64_ARRAY(p, ARMPredicateReg, 2 * ARM_MAX_VQ / 8),
 153         VMSTATE_END_OF_LIST()
 154     }
 155 };
 156
 157 static const VMStateDescription vmstate_sve = {
 158     .name = "cpu/sve",
 159     .version_id = 1,
 160     .minimum_version_id = 1,
 161     .needed = sve_needed,
 162     .fields = (VMStateField[]) {
 163         VMSTATE_STRUCT_ARRAY(env.vfp.zregs, ARMCPU, 32, 0,
 164                              vmstate_zreg_hi_reg, ARMVectorReg),
 165         VMSTATE_STRUCT_ARRAY(env.vfp.pregs, ARMCPU, 17, 0,
 166                              vmstate_preg_reg, ARMPredicateReg),
 167         VMSTATE_END_OF_LIST()
 168     }
 169 };
 170 #endif /* AARCH64 */
 171
 172 static bool serror_needed(void *opaque)
 173 {
 174     ARMCPU *cpu = opaque;
 175     CPUARMState *env = &cpu->env;
 176
 177     return env->serror.pending != 0;
 178 }
 179
 180 static const VMStateDescription vmstate_serror = {
 181     .name = "cpu/serror",
 182     .version_id = 1,
 183     .minimum_version_id = 1,
 184     .needed = serror_needed,
 185     .fields = (VMStateField[]) {
 186         VMSTATE_UINT8(env.serror.pending, ARMCPU),
 187         VMSTATE_UINT8(env.serror.has_esr, ARMCPU),
 188         VMSTATE_UINT64(env.serror.esr, ARMCPU),
 189         VMSTATE_END_OF_LIST()
 190     }
 191 };
 192
 193 static bool irq_line_state_needed(void *opaque)
 194 {
 195     return true;
 196 }
 197
 198 static const VMStateDescription vmstate_irq_line_state = {
 199     .name = "cpu/irq-line-state",
 200     .version_id = 1,
 201     .minimum_version_id = 1,
 202     .needed = irq_line_state_needed,
 203     .fields = (VMStateField[]) {
 204         VMSTATE_UINT32(env.irq_line_state, ARMCPU),
 205         VMSTATE_END_OF_LIST()
 206     }
 207 };
 208
 209 static bool m_needed(void *opaque)
 210 {
 211     ARMCPU *cpu = opaque;
 212     CPUARMState *env = &cpu->env;
 213
 214     return arm_feature(env, ARM_FEATURE_M);
 215 }
 216
 217 static const VMStateDescription vmstate_m_faultmask_primask = {
 218     .name = "cpu/m/faultmask-primask",
 219     .version_id = 1,
 220     .minimum_version_id = 1,
 221     .needed = m_needed,
 222     .fields = (VMStateField[]) {
 223         VMSTATE_UINT32(env.v7m.faultmask[M_REG_NS], ARMCPU),
 224         VMSTATE_UINT32(env.v7m.primask[M_REG_NS], ARMCPU),
 225         VMSTATE_END_OF_LIST()
 226     }
 227 };
 228
 229 /* CSSELR is in a subsection because we didn't implement it previously.
 230  * Migration from an old implementation will leave it at zero, which
 231  * is OK since the only CPUs in the old implementation make the
 232  * register RAZ/WI.
 233  * Since there was no version of QEMU which implemented the CSSELR for
 234  * just non-secure, we transfer both banks here rather than putting
 235  * the secure banked version in the m-security subsection.
 236  */
 237 static bool csselr_vmstate_validate(void *opaque, int version_id)
 238 {
 239     ARMCPU *cpu = opaque;
 240
 241     return cpu->env.v7m.csselr[M_REG_NS] <= R_V7M_CSSELR_INDEX_MASK
 242         && cpu->env.v7m.csselr[M_REG_S] <= R_V7M_CSSELR_INDEX_MASK;
 243 }
 244
 245 static bool m_csselr_needed(void *opaque)
 246 {
 247     ARMCPU *cpu = opaque;
 248
 249     return !arm_v7m_csselr_razwi(cpu);
 250 }
 251
 252 static const VMStateDescription vmstate_m_csselr = {
 253     .name = "cpu/m/csselr",
 254     .version_id = 1,
 255     .minimum_version_id = 1,
 256     .needed = m_csselr_needed,
 257     .fields = (VMStateField[]) {
 258         VMSTATE_UINT32_ARRAY(env.v7m.csselr, ARMCPU, M_REG_NUM_BANKS),
 259         VMSTATE_VALIDATE("CSSELR is valid", csselr_vmstate_validate),
 260         VMSTATE_END_OF_LIST()
 261     }
 262 };
 263
 264 static const VMStateDescription vmstate_m_scr = {
 265     .name = "cpu/m/scr",
 266     .version_id = 1,
 267     .minimum_version_id = 1,
 268     .needed = m_needed,
 269     .fields = (VMStateField[]) {
 270         VMSTATE_UINT32(env.v7m.scr[M_REG_NS], ARMCPU),
 271         VMSTATE_END_OF_LIST()
 272     }
 273 };
 274
 275 static const VMStateDescription vmstate_m_other_sp = {
 276     .name = "cpu/m/other-sp",
 277     .version_id = 1,
 278     .minimum_version_id = 1,
 279     .needed = m_needed,
 280     .fields = (VMStateField[]) {
 281         VMSTATE_UINT32(env.v7m.other_sp, ARMCPU),
 282         VMSTATE_END_OF_LIST()
 283     }
 284 };
 285
 286 static bool m_v8m_needed(void *opaque)
 287 {
 288     ARMCPU *cpu = opaque;
 289     CPUARMState *env = &cpu->env;
 290
 291     return arm_feature(env, ARM_FEATURE_M) && arm_feature(env, ARM_FEATURE_V8);
 292 }
 293
 294 static const VMStateDescription vmstate_m_v8m = {
 295     .name = "cpu/m/v8m",
 296     .version_id = 1,
 297     .minimum_version_id = 1,
 298     .needed = m_v8m_needed,
 299     .fields = (VMStateField[]) {
 300         VMSTATE_UINT32_ARRAY(env.v7m.msplim, ARMCPU, M_REG_NUM_BANKS),
 301         VMSTATE_UINT32_ARRAY(env.v7m.psplim, ARMCPU, M_REG_NUM_BANKS),
 302         VMSTATE_END_OF_LIST()
 303     }
 304 };
 305
 306 static const VMStateDescription vmstate_m_fp = {
 307     .name = "cpu/m/fp",
 308     .version_id = 1,
 309     .minimum_version_id = 1,
 310     .needed = vfp_needed,
 311     .fields = (VMStateField[]) {
 312         VMSTATE_UINT32_ARRAY(env.v7m.fpcar, ARMCPU, M_REG_NUM_BANKS),
 313         VMSTATE_UINT32_ARRAY(env.v7m.fpccr, ARMCPU, M_REG_NUM_BANKS),
 314         VMSTATE_UINT32_ARRAY(env.v7m.fpdscr, ARMCPU, M_REG_NUM_BANKS),
 315         VMSTATE_UINT32_ARRAY(env.v7m.cpacr, ARMCPU, M_REG_NUM_BANKS),
 316         VMSTATE_UINT32(env.v7m.nsacr, ARMCPU),
 317         VMSTATE_END_OF_LIST()
 318     }
 319 };
 320
 321 static bool mve_needed(void *opaque)
 322 {
 323     ARMCPU *cpu = opaque;
 324
 325     return cpu_isar_feature(aa32_mve, cpu);
 326 }
 327
 328 static const VMStateDescription vmstate_m_mve = {
 329     .name = "cpu/m/mve",
 330     .version_id = 1,
 331     .minimum_version_id = 1,
 332     .needed = mve_needed,
 333     .fields = (VMStateField[]) {
 334         VMSTATE_UINT32(env.v7m.vpr, ARMCPU),
 335         VMSTATE_UINT32(env.v7m.ltpsize, ARMCPU),
 336         VMSTATE_END_OF_LIST()
 337     },
 338 };
 339
 340 static const VMStateDescription vmstate_m = {
 341     .name = "cpu/m",
 342     .version_id = 4,
 343     .minimum_version_id = 4,
 344     .needed = m_needed,
 345     .fields = (VMStateField[]) {
 346         VMSTATE_UINT32(env.v7m.vecbase[M_REG_NS], ARMCPU),
 347         VMSTATE_UINT32(env.v7m.basepri[M_REG_NS], ARMCPU),
 348         VMSTATE_UINT32(env.v7m.control[M_REG_NS], ARMCPU),
 349         VMSTATE_UINT32(env.v7m.ccr[M_REG_NS], ARMCPU),
 350         VMSTATE_UINT32(env.v7m.cfsr[M_REG_NS], ARMCPU),
 351         VMSTATE_UINT32(env.v7m.hfsr, ARMCPU),
 352         VMSTATE_UINT32(env.v7m.dfsr, ARMCPU),
 353         VMSTATE_UINT32(env.v7m.mmfar[M_REG_NS], ARMCPU),
 354         VMSTATE_UINT32(env.v7m.bfar, ARMCPU),
 355         VMSTATE_UINT32(env.v7m.mpu_ctrl[M_REG_NS], ARMCPU),
 356         VMSTATE_INT32(env.v7m.exception, ARMCPU),
 357         VMSTATE_END_OF_LIST()
 358     },
 359     .subsections = (const VMStateDescription*[]) {
 360         &vmstate_m_faultmask_primask,
 361         &vmstate_m_csselr,
 362         &vmstate_m_scr,
 363         &vmstate_m_other_sp,
 364         &vmstate_m_v8m,
 365         &vmstate_m_fp,
 366         &vmstate_m_mve,
 367         NULL
 368     }
 369 };
 370
 371 static bool thumb2ee_needed(void *opaque)
 372 {
 373     ARMCPU *cpu = opaque;
 374     CPUARMState *env = &cpu->env;
 375
 376     return arm_feature(env, ARM_FEATURE_THUMB2EE);
 377 }
 378
 379 static const VMStateDescription vmstate_thumb2ee = {
 380     .name = "cpu/thumb2ee",
 381     .version_id = 1,
 382     .minimum_version_id = 1,
 383     .needed = thumb2ee_needed,
 384     .fields = (VMStateField[]) {
 385         VMSTATE_UINT32(env.teecr, ARMCPU),
 386         VMSTATE_UINT32(env.teehbr, ARMCPU),
 387         VMSTATE_END_OF_LIST()
 388     }
 389 };
 390
 391 static bool pmsav7_needed(void *opaque)
 392 {
 393     ARMCPU *cpu = opaque;
 394     CPUARMState *env = &cpu->env;
 395
 396     return arm_feature(env, ARM_FEATURE_PMSA) &&
 397            arm_feature(env, ARM_FEATURE_V7) &&
 398            !arm_feature(env, ARM_FEATURE_V8);
 399 }
 400
 401 static bool pmsav7_rgnr_vmstate_validate(void *opaque, int version_id)
 402 {
 403     ARMCPU *cpu = opaque;
 404
 405     return cpu->env.pmsav7.rnr[M_REG_NS] < cpu->pmsav7_dregion;
 406 }
 407
 408 static const VMStateDescription vmstate_pmsav7 = {
 409     .name = "cpu/pmsav7",
 410     .version_id = 1,
 411     .minimum_version_id = 1,
 412     .needed = pmsav7_needed,
 413     .fields = (VMStateField[]) {
 414         VMSTATE_VARRAY_UINT32(env.pmsav7.drbar, ARMCPU, pmsav7_dregion, 0,
 415                               vmstate_info_uint32, uint32_t),
 416         VMSTATE_VARRAY_UINT32(env.pmsav7.drsr, ARMCPU, pmsav7_dregion, 0,
 417                               vmstate_info_uint32, uint32_t),
 418         VMSTATE_VARRAY_UINT32(env.pmsav7.dracr, ARMCPU, pmsav7_dregion, 0,
 419                               vmstate_info_uint32, uint32_t),
 420         VMSTATE_VALIDATE("rgnr is valid", pmsav7_rgnr_vmstate_validate),
 421         VMSTATE_END_OF_LIST()
 422     }
 423 };
 424
 425 static bool pmsav7_rnr_needed(void *opaque)
 426 {
 427     ARMCPU *cpu = opaque;
 428     CPUARMState *env = &cpu->env;
 429
 430     /* For R profile cores pmsav7.rnr is migrated via the cpreg
 431      * "RGNR" definition in helper.h. For M profile we have to
 432      * migrate it separately.
 433      */
 434     return arm_feature(env, ARM_FEATURE_M);
 435 }
 436
 437 static const VMStateDescription vmstate_pmsav7_rnr = {
 438     .name = "cpu/pmsav7-rnr",
 439     .version_id = 1,
 440     .minimum_version_id = 1,
 441     .needed = pmsav7_rnr_needed,
 442     .fields = (VMStateField[]) {
 443         VMSTATE_UINT32(env.pmsav7.rnr[M_REG_NS], ARMCPU),
 444         VMSTATE_END_OF_LIST()
 445     }
 446 };
 447
 448 static bool pmsav8_needed(void *opaque)
 449 {
 450     ARMCPU *cpu = opaque;
 451     CPUARMState *env = &cpu->env;
 452
 453     return arm_feature(env, ARM_FEATURE_PMSA) &&
 454         arm_feature(env, ARM_FEATURE_V8);
 455 }
 456
 457 static const VMStateDescription vmstate_pmsav8 = {
 458     .name = "cpu/pmsav8",
 459     .version_id = 1,
 460     .minimum_version_id = 1,
 461     .needed = pmsav8_needed,
 462     .fields = (VMStateField[]) {
 463         VMSTATE_VARRAY_UINT32(env.pmsav8.rbar[M_REG_NS], ARMCPU, pmsav7_dregion,
 464                               0, vmstate_info_uint32, uint32_t),
 465         VMSTATE_VARRAY_UINT32(env.pmsav8.rlar[M_REG_NS], ARMCPU, pmsav7_dregion,
 466                               0, vmstate_info_uint32, uint32_t),
 467         VMSTATE_UINT32(env.pmsav8.mair0[M_REG_NS], ARMCPU),
 468         VMSTATE_UINT32(env.pmsav8.mair1[M_REG_NS], ARMCPU),
 469         VMSTATE_END_OF_LIST()
 470     }
 471 };
 472
 473 static bool s_rnr_vmstate_validate(void *opaque, int version_id)
 474 {
 475     ARMCPU *cpu = opaque;
 476
 477     return cpu->env.pmsav7.rnr[M_REG_S] < cpu->pmsav7_dregion;
 478 }
 479
 480 static bool sau_rnr_vmstate_validate(void *opaque, int version_id)
 481 {
 482     ARMCPU *cpu = opaque;
 483
 484     return cpu->env.sau.rnr < cpu->sau_sregion;
 485 }
 486
 487 static bool m_security_needed(void *opaque)
 488 {
 489     ARMCPU *cpu = opaque;
 490     CPUARMState *env = &cpu->env;
 491
 492     return arm_feature(env, ARM_FEATURE_M_SECURITY);
 493 }
 494
 495 static const VMStateDescription vmstate_m_security = {
 496     .name = "cpu/m-security",
 497     .version_id = 1,
 498     .minimum_version_id = 1,
 499     .needed = m_security_needed,
 500     .fields = (VMStateField[]) {
 501         VMSTATE_UINT32(env.v7m.secure, ARMCPU),
 502         VMSTATE_UINT32(env.v7m.other_ss_msp, ARMCPU),
 503         VMSTATE_UINT32(env.v7m.other_ss_psp, ARMCPU),
 504         VMSTATE_UINT32(env.v7m.basepri[M_REG_S], ARMCPU),
 505         VMSTATE_UINT32(env.v7m.primask[M_REG_S], ARMCPU),
 506         VMSTATE_UINT32(env.v7m.faultmask[M_REG_S], ARMCPU),
 507         VMSTATE_UINT32(env.v7m.control[M_REG_S], ARMCPU),
 508         VMSTATE_UINT32(env.v7m.vecbase[M_REG_S], ARMCPU),
 509         VMSTATE_UINT32(env.pmsav8.mair0[M_REG_S], ARMCPU),
 510         VMSTATE_UINT32(env.pmsav8.mair1[M_REG_S], ARMCPU),
 511         VMSTATE_VARRAY_UINT32(env.pmsav8.rbar[M_REG_S], ARMCPU, pmsav7_dregion,
 512                               0, vmstate_info_uint32, uint32_t),
 513         VMSTATE_VARRAY_UINT32(env.pmsav8.rlar[M_REG_S], ARMCPU, pmsav7_dregion,
 514                               0, vmstate_info_uint32, uint32_t),
 515         VMSTATE_UINT32(env.pmsav7.rnr[M_REG_S], ARMCPU),
 516         VMSTATE_VALIDATE("secure MPU_RNR is valid", s_rnr_vmstate_validate),
 517         VMSTATE_UINT32(env.v7m.mpu_ctrl[M_REG_S], ARMCPU),
 518         VMSTATE_UINT32(env.v7m.ccr[M_REG_S], ARMCPU),
 519         VMSTATE_UINT32(env.v7m.mmfar[M_REG_S], ARMCPU),
 520         VMSTATE_UINT32(env.v7m.cfsr[M_REG_S], ARMCPU),
 521         VMSTATE_UINT32(env.v7m.sfsr, ARMCPU),
 522         VMSTATE_UINT32(env.v7m.sfar, ARMCPU),
 523         VMSTATE_VARRAY_UINT32(env.sau.rbar, ARMCPU, sau_sregion, 0,
 524                               vmstate_info_uint32, uint32_t),
 525         VMSTATE_VARRAY_UINT32(env.sau.rlar, ARMCPU, sau_sregion, 0,
 526                               vmstate_info_uint32, uint32_t),
 527         VMSTATE_UINT32(env.sau.rnr, ARMCPU),
 528         VMSTATE_VALIDATE("SAU_RNR is valid", sau_rnr_vmstate_validate),
 529         VMSTATE_UINT32(env.sau.ctrl, ARMCPU),
 530         VMSTATE_UINT32(env.v7m.scr[M_REG_S], ARMCPU),
 531         /* AIRCR is not secure-only, but our implementation is R/O if the
 532          * security extension is unimplemented, so we migrate it here.
 533          */
 534         VMSTATE_UINT32(env.v7m.aircr, ARMCPU),
 535         VMSTATE_END_OF_LIST()
 536     }
 537 };
 538
 539 static int get_cpsr(QEMUFile *f, void *opaque, size_t size,
 540                     const VMStateField *field)
 541 {
 542     ARMCPU *cpu = opaque;
 543     CPUARMState *env = &cpu->env;
 544     uint32_t val = qemu_get_be32(f);
 545
 546     if (arm_feature(env, ARM_FEATURE_M)) {
 547         if (val & XPSR_EXCP) {
 548             /* This is a CPSR format value from an older QEMU. (We can tell
 549              * because values transferred in XPSR format always have zero
 550              * for the EXCP field, and CPSR format will always have bit 4
 551              * set in CPSR_M.) Rearrange it into XPSR format. The significant
 552              * differences are that the T bit is not in the same place, the
 553              * primask/faultmask info may be in the CPSR I and F bits, and
 554              * we do not want the mode bits.
 555              * We know that this cleanup happened before v8M, so there
 556              * is no complication with banked primask/faultmask.
 557              */
 558             uint32_t newval = val;
 559
 560             assert(!arm_feature(env, ARM_FEATURE_M_SECURITY));
 561
 562             newval &= (CPSR_NZCV | CPSR_Q | CPSR_IT | CPSR_GE);
 563             if (val & CPSR_T) {
 564                 newval |= XPSR_T;
 565             }
 566             /* If the I or F bits are set then this is a migration from
 567              * an old QEMU which still stored the M profile FAULTMASK
 568              * and PRIMASK in env->daif. For a new QEMU, the data is
 569              * transferred using the vmstate_m_faultmask_primask subsection.
 570              */
 571             if (val & CPSR_F) {
 572                 env->v7m.faultmask[M_REG_NS] = 1;
 573             }
 574             if (val & CPSR_I) {
 575                 env->v7m.primask[M_REG_NS] = 1;
 576             }
 577             val = newval;
 578         }
 579         /* Ignore the low bits, they are handled by vmstate_m. */
 580         xpsr_write(env, val, ~XPSR_EXCP);
 581         return 0;
 582     }
 583
 584     env->aarch64 = ((val & PSTATE_nRW) == 0);
 585
 586     if (is_a64(env)) {
 587         pstate_write(env, val);
 588         return 0;
 589     }
 590
 591     cpsr_write(env, val, 0xffffffff, CPSRWriteRaw);
 592     return 0;
 593 }
 594
 595 static int put_cpsr(QEMUFile *f, void *opaque, size_t size,
 596                     const VMStateField *field, JSONWriter *vmdesc)
 597 {
 598     ARMCPU *cpu = opaque;
 599     CPUARMState *env = &cpu->env;
 600     uint32_t val;
 601
 602     if (arm_feature(env, ARM_FEATURE_M)) {
 603         /* The low 9 bits are v7m.exception, which is handled by vmstate_m. */
 604         val = xpsr_read(env) & ~XPSR_EXCP;
 605     } else if (is_a64(env)) {
 606         val = pstate_read(env);
 607     } else {
 608         val = cpsr_read(env);
 609     }
 610
 611     qemu_put_be32(f, val);
 612     return 0;
 613 }
 614
 615 static const VMStateInfo vmstate_cpsr = {
 616     .name = "cpsr",
 617     .get = get_cpsr,
 618     .put = put_cpsr,
 619 };
 620
 621 static int get_power(QEMUFile *f, void *opaque, size_t size,
 622                     const VMStateField *field)
 623 {
 624     ARMCPU *cpu = opaque;
 625     bool powered_off = qemu_get_byte(f);
 626     cpu->power_state = powered_off ? PSCI_OFF : PSCI_ON;
 627     return 0;
 628 }
 629
 630 static int put_power(QEMUFile *f, void *opaque, size_t size,
 631                     const VMStateField *field, JSONWriter *vmdesc)
 632 {
 633     ARMCPU *cpu = opaque;
 634
 635     /* Migration should never happen while we transition power states */
 636
 637     if (cpu->power_state == PSCI_ON ||
 638         cpu->power_state == PSCI_OFF) {
 639         bool powered_off = (cpu->power_state == PSCI_OFF) ? true : false;
 640         qemu_put_byte(f, powered_off);
 641         return 0;
 642     } else {
 643         return 1;
 644     }
 645 }
 646
 647 static const VMStateInfo vmstate_powered_off = {
 648     .name = "powered_off",
 649     .get = get_power,
 650     .put = put_power,
 651 };
 652
 653 static int cpu_pre_save(void *opaque)
 654 {
 655     ARMCPU *cpu = opaque;
 656
 657     if (!kvm_enabled()) {
 658         pmu_op_start(&cpu->env);
 659     }
 660
 661     if (kvm_enabled()) {
 662         if (!write_kvmstate_to_list(cpu)) {
 663             /* This should never fail */
 664             g_assert_not_reached();
 665         }
 666
 667         /*
 668          * kvm_arm_cpu_pre_save() must be called after
 669          * write_kvmstate_to_list()
 670          */
 671         kvm_arm_cpu_pre_save(cpu);
 672     } else {
 673         if (!write_cpustate_to_list(cpu, false)) {
 674             /* This should never fail. */
 675             g_assert_not_reached();
 676         }
 677     }
 678
 679     cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len;
 680     memcpy(cpu->cpreg_vmstate_indexes, cpu->cpreg_indexes,
 681            cpu->cpreg_array_len * sizeof(uint64_t));
 682     memcpy(cpu->cpreg_vmstate_values, cpu->cpreg_values,
 683            cpu->cpreg_array_len * sizeof(uint64_t));
 684
 685     return 0;
 686 }
 687
 688 static int cpu_post_save(void *opaque)
 689 {
 690     ARMCPU *cpu = opaque;
 691
 692     if (!kvm_enabled()) {
 693         pmu_op_finish(&cpu->env);
 694     }
 695
 696     return 0;
 697 }
 698
 699 static int cpu_pre_load(void *opaque)
 700 {
 701     ARMCPU *cpu = opaque;
 702     CPUARMState *env = &cpu->env;
 703
 704     /*
 705      * Pre-initialize irq_line_state to a value that's never valid as
 706      * real data, so cpu_post_load() can tell whether we've seen the
 707      * irq-line-state subsection in the incoming migration state.
 708      */
 709     env->irq_line_state = UINT32_MAX;
 710
 711     if (!kvm_enabled()) {
 712         pmu_op_start(&cpu->env);
 713     }
 714
 715     return 0;
 716 }
 717
 718 static int cpu_post_load(void *opaque, int version_id)
 719 {
 720     ARMCPU *cpu = opaque;
 721     CPUARMState *env = &cpu->env;
 722     int i, v;
 723
 724     /*
 725      * Handle migration compatibility from old QEMU which didn't
 726      * send the irq-line-state subsection. A QEMU without it did not
 727      * implement the HCR_EL2.{VI,VF} bits as generating interrupts,
 728      * so for TCG the line state matches the bits set in cs->interrupt_request.
 729      * For KVM the line state is not stored in cs->interrupt_request
 730      * and so this will leave irq_line_state as 0, but this is OK because
 731      * we only need to care about it for TCG.
 732      */
 733     if (env->irq_line_state == UINT32_MAX) {
 734         CPUState *cs = CPU(cpu);
 735
 736         env->irq_line_state = cs->interrupt_request &
 737             (CPU_INTERRUPT_HARD | CPU_INTERRUPT_FIQ |
 738              CPU_INTERRUPT_VIRQ | CPU_INTERRUPT_VFIQ);
 739     }
 740
 741     /* Update the values list from the incoming migration data.
 742      * Anything in the incoming data which we don't know about is
 743      * a migration failure; anything we know about but the incoming
 744      * data doesn't specify retains its current (reset) value.
 745      * The indexes list remains untouched -- we only inspect the
 746      * incoming migration index list so we can match the values array
 747      * entries with the right slots in our own values array.
 748      */
 749
 750     for (i = 0, v = 0; i < cpu->cpreg_array_len
 751              && v < cpu->cpreg_vmstate_array_len; i++) {
 752         if (cpu->cpreg_vmstate_indexes[v] > cpu->cpreg_indexes[i]) {
 753             /* register in our list but not incoming : skip it */
 754             continue;
 755         }
 756         if (cpu->cpreg_vmstate_indexes[v] < cpu->cpreg_indexes[i]) {
 757             /* register in their list but not ours: fail migration */
 758             return -1;
 759         }
 760         /* matching register, copy the value over */
 761         cpu->cpreg_values[i] = cpu->cpreg_vmstate_values[v];
 762         v++;
 763     }
 764
 765     if (kvm_enabled()) {
 766         if (!write_list_to_kvmstate(cpu, KVM_PUT_FULL_STATE)) {
 767             return -1;
 768         }
 769         /* Note that it's OK for the TCG side not to know about
 770          * every register in the list; KVM is authoritative if
 771          * we're using it.
 772          */
 773         write_list_to_cpustate(cpu);
 774         kvm_arm_cpu_post_load(cpu);
 775     } else {
 776         if (!write_list_to_cpustate(cpu)) {
 777             return -1;
 778         }
 779     }
 780
 781     hw_breakpoint_update_all(cpu);
 782     hw_watchpoint_update_all(cpu);
 783
 784     /*
 785      * TCG gen_update_fp_context() relies on the invariant that
 786      * FPDSCR.LTPSIZE is constant 4 for M-profile with the LOB extension;
 787      * forbid bogus incoming data with some other value.
 788      */
 789     if (arm_feature(env, ARM_FEATURE_M) && cpu_isar_feature(aa32_lob, cpu)) {
 790         if (extract32(env->v7m.fpdscr[M_REG_NS],
 791                       FPCR_LTPSIZE_SHIFT, FPCR_LTPSIZE_LENGTH) != 4 ||
 792             extract32(env->v7m.fpdscr[M_REG_S],
 793                       FPCR_LTPSIZE_SHIFT, FPCR_LTPSIZE_LENGTH) != 4) {
 794             return -1;
 795         }
 796     }
 797
 798     /*
 799      * Misaligned thumb pc is architecturally impossible.
 800      * We have an assert in thumb_tr_translate_insn to verify this.
 801      * Fail an incoming migrate to avoid this assert.
 802      */
 803     if (!is_a64(env) && env->thumb && (env->regs[15] & 1)) {
 804         return -1;
 805     }
 806
 807     if (!kvm_enabled()) {
 808         pmu_op_finish(&cpu->env);
 809     }
 810     arm_rebuild_hflags(&cpu->env);
 811
 812     return 0;
 813 }
 814
 815 const VMStateDescription vmstate_arm_cpu = {
 816     .name = "cpu",
 817     .version_id = 22,
 818     .minimum_version_id = 22,
 819     .pre_save = cpu_pre_save,
 820     .post_save = cpu_post_save,
 821     .pre_load = cpu_pre_load,
 822     .post_load = cpu_post_load,
 823     .fields = (VMStateField[]) {
 824         VMSTATE_UINT32_ARRAY(env.regs, ARMCPU, 16),
 825         VMSTATE_UINT64_ARRAY(env.xregs, ARMCPU, 32),
 826         VMSTATE_UINT64(env.pc, ARMCPU),
 827         {
 828             .name = "cpsr",
 829             .version_id = 0,
 830             .size = sizeof(uint32_t),
 831             .info = &vmstate_cpsr,
 832             .flags = VMS_SINGLE,
 833             .offset = 0,
 834         },
 835         VMSTATE_UINT32(env.spsr, ARMCPU),
 836         VMSTATE_UINT64_ARRAY(env.banked_spsr, ARMCPU, 8),
 837         VMSTATE_UINT32_ARRAY(env.banked_r13, ARMCPU, 8),
 838         VMSTATE_UINT32_ARRAY(env.banked_r14, ARMCPU, 8),
 839         VMSTATE_UINT32_ARRAY(env.usr_regs, ARMCPU, 5),
 840         VMSTATE_UINT32_ARRAY(env.fiq_regs, ARMCPU, 5),
 841         VMSTATE_UINT64_ARRAY(env.elr_el, ARMCPU, 4),
 842         VMSTATE_UINT64_ARRAY(env.sp_el, ARMCPU, 4),
 843         /* The length-check must come before the arrays to avoid
 844          * incoming data possibly overflowing the array.
 845          */
 846         VMSTATE_INT32_POSITIVE_LE(cpreg_vmstate_array_len, ARMCPU),
 847         VMSTATE_VARRAY_INT32(cpreg_vmstate_indexes, ARMCPU,
 848                              cpreg_vmstate_array_len,
 849                              0, vmstate_info_uint64, uint64_t),
 850         VMSTATE_VARRAY_INT32(cpreg_vmstate_values, ARMCPU,
 851                              cpreg_vmstate_array_len,
 852                              0, vmstate_info_uint64, uint64_t),
 853         VMSTATE_UINT64(env.exclusive_addr, ARMCPU),
 854         VMSTATE_UINT64(env.exclusive_val, ARMCPU),
 855         VMSTATE_UINT64(env.exclusive_high, ARMCPU),
 856         VMSTATE_UNUSED(sizeof(uint64_t)),
 857         VMSTATE_UINT32(env.exception.syndrome, ARMCPU),
 858         VMSTATE_UINT32(env.exception.fsr, ARMCPU),
 859         VMSTATE_UINT64(env.exception.vaddress, ARMCPU),
 860         VMSTATE_TIMER_PTR(gt_timer[GTIMER_PHYS], ARMCPU),
 861         VMSTATE_TIMER_PTR(gt_timer[GTIMER_VIRT], ARMCPU),
 862         {
 863             .name = "power_state",
 864             .version_id = 0,
 865             .size = sizeof(bool),
 866             .info = &vmstate_powered_off,
 867             .flags = VMS_SINGLE,
 868             .offset = 0,
 869         },
 870         VMSTATE_END_OF_LIST()
 871     },
 872     .subsections = (const VMStateDescription*[]) {
 873         &vmstate_vfp,
 874         &vmstate_iwmmxt,
 875         &vmstate_m,
 876         &vmstate_thumb2ee,
 877         /* pmsav7_rnr must come before pmsav7 so that we have the
 878          * region number before we test it in the VMSTATE_VALIDATE
 879          * in vmstate_pmsav7.
 880          */
 881         &vmstate_pmsav7_rnr,
 882         &vmstate_pmsav7,
 883         &vmstate_pmsav8,
 884         &vmstate_m_security,
 885 #ifdef TARGET_AARCH64
 886         &vmstate_sve,
 887 #endif
 888         &vmstate_serror,
 889         &vmstate_irq_line_state,
 890         NULL
 891     }
 892 };