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
 171 static const VMStateDescription vmstate_vreg = {
 172     .name = "vreg",
 173     .version_id = 1,
 174     .minimum_version_id = 1,
 175     .fields = (VMStateField[]) {
 176         VMSTATE_UINT64_ARRAY(d, ARMVectorReg, ARM_MAX_VQ * 2),
 177         VMSTATE_END_OF_LIST()
 178     }
 179 };
 180
 181 static bool za_needed(void *opaque)
 182 {
 183     ARMCPU *cpu = opaque;
 184
 185     /*
 186      * When ZA storage is disabled, its contents are discarded.
 187      * It will be zeroed when ZA storage is re-enabled.
 188      */
 189     return FIELD_EX64(cpu->env.svcr, SVCR, ZA);
 190 }
 191
 192 static const VMStateDescription vmstate_za = {
 193     .name = "cpu/sme",
 194     .version_id = 1,
 195     .minimum_version_id = 1,
 196     .needed = za_needed,
 197     .fields = (VMStateField[]) {
 198         VMSTATE_STRUCT_ARRAY(env.zarray, ARMCPU, ARM_MAX_VQ * 16, 0,
 199                              vmstate_vreg, ARMVectorReg),
 200         VMSTATE_END_OF_LIST()
 201     }
 202 };
 203 #endif /* AARCH64 */
 204
 205 static bool serror_needed(void *opaque)
 206 {
 207     ARMCPU *cpu = opaque;
 208     CPUARMState *env = &cpu->env;
 209
 210     return env->serror.pending != 0;
 211 }
 212
 213 static const VMStateDescription vmstate_serror = {
 214     .name = "cpu/serror",
 215     .version_id = 1,
 216     .minimum_version_id = 1,
 217     .needed = serror_needed,
 218     .fields = (VMStateField[]) {
 219         VMSTATE_UINT8(env.serror.pending, ARMCPU),
 220         VMSTATE_UINT8(env.serror.has_esr, ARMCPU),
 221         VMSTATE_UINT64(env.serror.esr, ARMCPU),
 222         VMSTATE_END_OF_LIST()
 223     }
 224 };
 225
 226 static bool irq_line_state_needed(void *opaque)
 227 {
 228     return true;
 229 }
 230
 231 static const VMStateDescription vmstate_irq_line_state = {
 232     .name = "cpu/irq-line-state",
 233     .version_id = 1,
 234     .minimum_version_id = 1,
 235     .needed = irq_line_state_needed,
 236     .fields = (VMStateField[]) {
 237         VMSTATE_UINT32(env.irq_line_state, ARMCPU),
 238         VMSTATE_END_OF_LIST()
 239     }
 240 };
 241
 242 static bool m_needed(void *opaque)
 243 {
 244     ARMCPU *cpu = opaque;
 245     CPUARMState *env = &cpu->env;
 246
 247     return arm_feature(env, ARM_FEATURE_M);
 248 }
 249
 250 static const VMStateDescription vmstate_m_faultmask_primask = {
 251     .name = "cpu/m/faultmask-primask",
 252     .version_id = 1,
 253     .minimum_version_id = 1,
 254     .needed = m_needed,
 255     .fields = (VMStateField[]) {
 256         VMSTATE_UINT32(env.v7m.faultmask[M_REG_NS], ARMCPU),
 257         VMSTATE_UINT32(env.v7m.primask[M_REG_NS], ARMCPU),
 258         VMSTATE_END_OF_LIST()
 259     }
 260 };
 261
 262 /* CSSELR is in a subsection because we didn't implement it previously.
 263  * Migration from an old implementation will leave it at zero, which
 264  * is OK since the only CPUs in the old implementation make the
 265  * register RAZ/WI.
 266  * Since there was no version of QEMU which implemented the CSSELR for
 267  * just non-secure, we transfer both banks here rather than putting
 268  * the secure banked version in the m-security subsection.
 269  */
 270 static bool csselr_vmstate_validate(void *opaque, int version_id)
 271 {
 272     ARMCPU *cpu = opaque;
 273
 274     return cpu->env.v7m.csselr[M_REG_NS] <= R_V7M_CSSELR_INDEX_MASK
 275         && cpu->env.v7m.csselr[M_REG_S] <= R_V7M_CSSELR_INDEX_MASK;
 276 }
 277
 278 static bool m_csselr_needed(void *opaque)
 279 {
 280     ARMCPU *cpu = opaque;
 281
 282     return !arm_v7m_csselr_razwi(cpu);
 283 }
 284
 285 static const VMStateDescription vmstate_m_csselr = {
 286     .name = "cpu/m/csselr",
 287     .version_id = 1,
 288     .minimum_version_id = 1,
 289     .needed = m_csselr_needed,
 290     .fields = (VMStateField[]) {
 291         VMSTATE_UINT32_ARRAY(env.v7m.csselr, ARMCPU, M_REG_NUM_BANKS),
 292         VMSTATE_VALIDATE("CSSELR is valid", csselr_vmstate_validate),
 293         VMSTATE_END_OF_LIST()
 294     }
 295 };
 296
 297 static const VMStateDescription vmstate_m_scr = {
 298     .name = "cpu/m/scr",
 299     .version_id = 1,
 300     .minimum_version_id = 1,
 301     .needed = m_needed,
 302     .fields = (VMStateField[]) {
 303         VMSTATE_UINT32(env.v7m.scr[M_REG_NS], ARMCPU),
 304         VMSTATE_END_OF_LIST()
 305     }
 306 };
 307
 308 static const VMStateDescription vmstate_m_other_sp = {
 309     .name = "cpu/m/other-sp",
 310     .version_id = 1,
 311     .minimum_version_id = 1,
 312     .needed = m_needed,
 313     .fields = (VMStateField[]) {
 314         VMSTATE_UINT32(env.v7m.other_sp, ARMCPU),
 315         VMSTATE_END_OF_LIST()
 316     }
 317 };
 318
 319 static bool m_v8m_needed(void *opaque)
 320 {
 321     ARMCPU *cpu = opaque;
 322     CPUARMState *env = &cpu->env;
 323
 324     return arm_feature(env, ARM_FEATURE_M) && arm_feature(env, ARM_FEATURE_V8);
 325 }
 326
 327 static const VMStateDescription vmstate_m_v8m = {
 328     .name = "cpu/m/v8m",
 329     .version_id = 1,
 330     .minimum_version_id = 1,
 331     .needed = m_v8m_needed,
 332     .fields = (VMStateField[]) {
 333         VMSTATE_UINT32_ARRAY(env.v7m.msplim, ARMCPU, M_REG_NUM_BANKS),
 334         VMSTATE_UINT32_ARRAY(env.v7m.psplim, ARMCPU, M_REG_NUM_BANKS),
 335         VMSTATE_END_OF_LIST()
 336     }
 337 };
 338
 339 static const VMStateDescription vmstate_m_fp = {
 340     .name = "cpu/m/fp",
 341     .version_id = 1,
 342     .minimum_version_id = 1,
 343     .needed = vfp_needed,
 344     .fields = (VMStateField[]) {
 345         VMSTATE_UINT32_ARRAY(env.v7m.fpcar, ARMCPU, M_REG_NUM_BANKS),
 346         VMSTATE_UINT32_ARRAY(env.v7m.fpccr, ARMCPU, M_REG_NUM_BANKS),
 347         VMSTATE_UINT32_ARRAY(env.v7m.fpdscr, ARMCPU, M_REG_NUM_BANKS),
 348         VMSTATE_UINT32_ARRAY(env.v7m.cpacr, ARMCPU, M_REG_NUM_BANKS),
 349         VMSTATE_UINT32(env.v7m.nsacr, ARMCPU),
 350         VMSTATE_END_OF_LIST()
 351     }
 352 };
 353
 354 static bool mve_needed(void *opaque)
 355 {
 356     ARMCPU *cpu = opaque;
 357
 358     return cpu_isar_feature(aa32_mve, cpu);
 359 }
 360
 361 static const VMStateDescription vmstate_m_mve = {
 362     .name = "cpu/m/mve",
 363     .version_id = 1,
 364     .minimum_version_id = 1,
 365     .needed = mve_needed,
 366     .fields = (VMStateField[]) {
 367         VMSTATE_UINT32(env.v7m.vpr, ARMCPU),
 368         VMSTATE_UINT32(env.v7m.ltpsize, ARMCPU),
 369         VMSTATE_END_OF_LIST()
 370     },
 371 };
 372
 373 static const VMStateDescription vmstate_m = {
 374     .name = "cpu/m",
 375     .version_id = 4,
 376     .minimum_version_id = 4,
 377     .needed = m_needed,
 378     .fields = (VMStateField[]) {
 379         VMSTATE_UINT32(env.v7m.vecbase[M_REG_NS], ARMCPU),
 380         VMSTATE_UINT32(env.v7m.basepri[M_REG_NS], ARMCPU),
 381         VMSTATE_UINT32(env.v7m.control[M_REG_NS], ARMCPU),
 382         VMSTATE_UINT32(env.v7m.ccr[M_REG_NS], ARMCPU),
 383         VMSTATE_UINT32(env.v7m.cfsr[M_REG_NS], ARMCPU),
 384         VMSTATE_UINT32(env.v7m.hfsr, ARMCPU),
 385         VMSTATE_UINT32(env.v7m.dfsr, ARMCPU),
 386         VMSTATE_UINT32(env.v7m.mmfar[M_REG_NS], ARMCPU),
 387         VMSTATE_UINT32(env.v7m.bfar, ARMCPU),
 388         VMSTATE_UINT32(env.v7m.mpu_ctrl[M_REG_NS], ARMCPU),
 389         VMSTATE_INT32(env.v7m.exception, ARMCPU),
 390         VMSTATE_END_OF_LIST()
 391     },
 392     .subsections = (const VMStateDescription*[]) {
 393         &vmstate_m_faultmask_primask,
 394         &vmstate_m_csselr,
 395         &vmstate_m_scr,
 396         &vmstate_m_other_sp,
 397         &vmstate_m_v8m,
 398         &vmstate_m_fp,
 399         &vmstate_m_mve,
 400         NULL
 401     }
 402 };
 403
 404 static bool thumb2ee_needed(void *opaque)
 405 {
 406     ARMCPU *cpu = opaque;
 407     CPUARMState *env = &cpu->env;
 408
 409     return arm_feature(env, ARM_FEATURE_THUMB2EE);
 410 }
 411
 412 static const VMStateDescription vmstate_thumb2ee = {
 413     .name = "cpu/thumb2ee",
 414     .version_id = 1,
 415     .minimum_version_id = 1,
 416     .needed = thumb2ee_needed,
 417     .fields = (VMStateField[]) {
 418         VMSTATE_UINT32(env.teecr, ARMCPU),
 419         VMSTATE_UINT32(env.teehbr, ARMCPU),
 420         VMSTATE_END_OF_LIST()
 421     }
 422 };
 423
 424 static bool pmsav7_needed(void *opaque)
 425 {
 426     ARMCPU *cpu = opaque;
 427     CPUARMState *env = &cpu->env;
 428
 429     return arm_feature(env, ARM_FEATURE_PMSA) &&
 430            arm_feature(env, ARM_FEATURE_V7) &&
 431            !arm_feature(env, ARM_FEATURE_V8);
 432 }
 433
 434 static bool pmsav7_rgnr_vmstate_validate(void *opaque, int version_id)
 435 {
 436     ARMCPU *cpu = opaque;
 437
 438     return cpu->env.pmsav7.rnr[M_REG_NS] < cpu->pmsav7_dregion;
 439 }
 440
 441 static const VMStateDescription vmstate_pmsav7 = {
 442     .name = "cpu/pmsav7",
 443     .version_id = 1,
 444     .minimum_version_id = 1,
 445     .needed = pmsav7_needed,
 446     .fields = (VMStateField[]) {
 447         VMSTATE_VARRAY_UINT32(env.pmsav7.drbar, ARMCPU, pmsav7_dregion, 0,
 448                               vmstate_info_uint32, uint32_t),
 449         VMSTATE_VARRAY_UINT32(env.pmsav7.drsr, ARMCPU, pmsav7_dregion, 0,
 450                               vmstate_info_uint32, uint32_t),
 451         VMSTATE_VARRAY_UINT32(env.pmsav7.dracr, ARMCPU, pmsav7_dregion, 0,
 452                               vmstate_info_uint32, uint32_t),
 453         VMSTATE_VALIDATE("rgnr is valid", pmsav7_rgnr_vmstate_validate),
 454         VMSTATE_END_OF_LIST()
 455     }
 456 };
 457
 458 static bool pmsav7_rnr_needed(void *opaque)
 459 {
 460     ARMCPU *cpu = opaque;
 461     CPUARMState *env = &cpu->env;
 462
 463     /* For R profile cores pmsav7.rnr is migrated via the cpreg
 464      * "RGNR" definition in helper.h. For M profile we have to
 465      * migrate it separately.
 466      */
 467     return arm_feature(env, ARM_FEATURE_M);
 468 }
 469
 470 static const VMStateDescription vmstate_pmsav7_rnr = {
 471     .name = "cpu/pmsav7-rnr",
 472     .version_id = 1,
 473     .minimum_version_id = 1,
 474     .needed = pmsav7_rnr_needed,
 475     .fields = (VMStateField[]) {
 476         VMSTATE_UINT32(env.pmsav7.rnr[M_REG_NS], ARMCPU),
 477         VMSTATE_END_OF_LIST()
 478     }
 479 };
 480
 481 static bool pmsav8_needed(void *opaque)
 482 {
 483     ARMCPU *cpu = opaque;
 484     CPUARMState *env = &cpu->env;
 485
 486     return arm_feature(env, ARM_FEATURE_PMSA) &&
 487         arm_feature(env, ARM_FEATURE_V8);
 488 }
 489
 490 static const VMStateDescription vmstate_pmsav8 = {
 491     .name = "cpu/pmsav8",
 492     .version_id = 1,
 493     .minimum_version_id = 1,
 494     .needed = pmsav8_needed,
 495     .fields = (VMStateField[]) {
 496         VMSTATE_VARRAY_UINT32(env.pmsav8.rbar[M_REG_NS], ARMCPU, pmsav7_dregion,
 497                               0, vmstate_info_uint32, uint32_t),
 498         VMSTATE_VARRAY_UINT32(env.pmsav8.rlar[M_REG_NS], ARMCPU, pmsav7_dregion,
 499                               0, vmstate_info_uint32, uint32_t),
 500         VMSTATE_UINT32(env.pmsav8.mair0[M_REG_NS], ARMCPU),
 501         VMSTATE_UINT32(env.pmsav8.mair1[M_REG_NS], ARMCPU),
 502         VMSTATE_END_OF_LIST()
 503     }
 504 };
 505
 506 static bool s_rnr_vmstate_validate(void *opaque, int version_id)
 507 {
 508     ARMCPU *cpu = opaque;
 509
 510     return cpu->env.pmsav7.rnr[M_REG_S] < cpu->pmsav7_dregion;
 511 }
 512
 513 static bool sau_rnr_vmstate_validate(void *opaque, int version_id)
 514 {
 515     ARMCPU *cpu = opaque;
 516
 517     return cpu->env.sau.rnr < cpu->sau_sregion;
 518 }
 519
 520 static bool m_security_needed(void *opaque)
 521 {
 522     ARMCPU *cpu = opaque;
 523     CPUARMState *env = &cpu->env;
 524
 525     return arm_feature(env, ARM_FEATURE_M_SECURITY);
 526 }
 527
 528 static const VMStateDescription vmstate_m_security = {
 529     .name = "cpu/m-security",
 530     .version_id = 1,
 531     .minimum_version_id = 1,
 532     .needed = m_security_needed,
 533     .fields = (VMStateField[]) {
 534         VMSTATE_UINT32(env.v7m.secure, ARMCPU),
 535         VMSTATE_UINT32(env.v7m.other_ss_msp, ARMCPU),
 536         VMSTATE_UINT32(env.v7m.other_ss_psp, ARMCPU),
 537         VMSTATE_UINT32(env.v7m.basepri[M_REG_S], ARMCPU),
 538         VMSTATE_UINT32(env.v7m.primask[M_REG_S], ARMCPU),
 539         VMSTATE_UINT32(env.v7m.faultmask[M_REG_S], ARMCPU),
 540         VMSTATE_UINT32(env.v7m.control[M_REG_S], ARMCPU),
 541         VMSTATE_UINT32(env.v7m.vecbase[M_REG_S], ARMCPU),
 542         VMSTATE_UINT32(env.pmsav8.mair0[M_REG_S], ARMCPU),
 543         VMSTATE_UINT32(env.pmsav8.mair1[M_REG_S], ARMCPU),
 544         VMSTATE_VARRAY_UINT32(env.pmsav8.rbar[M_REG_S], ARMCPU, pmsav7_dregion,
 545                               0, vmstate_info_uint32, uint32_t),
 546         VMSTATE_VARRAY_UINT32(env.pmsav8.rlar[M_REG_S], ARMCPU, pmsav7_dregion,
 547                               0, vmstate_info_uint32, uint32_t),
 548         VMSTATE_UINT32(env.pmsav7.rnr[M_REG_S], ARMCPU),
 549         VMSTATE_VALIDATE("secure MPU_RNR is valid", s_rnr_vmstate_validate),
 550         VMSTATE_UINT32(env.v7m.mpu_ctrl[M_REG_S], ARMCPU),
 551         VMSTATE_UINT32(env.v7m.ccr[M_REG_S], ARMCPU),
 552         VMSTATE_UINT32(env.v7m.mmfar[M_REG_S], ARMCPU),
 553         VMSTATE_UINT32(env.v7m.cfsr[M_REG_S], ARMCPU),
 554         VMSTATE_UINT32(env.v7m.sfsr, ARMCPU),
 555         VMSTATE_UINT32(env.v7m.sfar, ARMCPU),
 556         VMSTATE_VARRAY_UINT32(env.sau.rbar, ARMCPU, sau_sregion, 0,
 557                               vmstate_info_uint32, uint32_t),
 558         VMSTATE_VARRAY_UINT32(env.sau.rlar, ARMCPU, sau_sregion, 0,
 559                               vmstate_info_uint32, uint32_t),
 560         VMSTATE_UINT32(env.sau.rnr, ARMCPU),
 561         VMSTATE_VALIDATE("SAU_RNR is valid", sau_rnr_vmstate_validate),
 562         VMSTATE_UINT32(env.sau.ctrl, ARMCPU),
 563         VMSTATE_UINT32(env.v7m.scr[M_REG_S], ARMCPU),
 564         /* AIRCR is not secure-only, but our implementation is R/O if the
 565          * security extension is unimplemented, so we migrate it here.
 566          */
 567         VMSTATE_UINT32(env.v7m.aircr, ARMCPU),
 568         VMSTATE_END_OF_LIST()
 569     }
 570 };
 571
 572 static int get_cpsr(QEMUFile *f, void *opaque, size_t size,
 573                     const VMStateField *field)
 574 {
 575     ARMCPU *cpu = opaque;
 576     CPUARMState *env = &cpu->env;
 577     uint32_t val = qemu_get_be32(f);
 578
 579     if (arm_feature(env, ARM_FEATURE_M)) {
 580         if (val & XPSR_EXCP) {
 581             /* This is a CPSR format value from an older QEMU. (We can tell
 582              * because values transferred in XPSR format always have zero
 583              * for the EXCP field, and CPSR format will always have bit 4
 584              * set in CPSR_M.) Rearrange it into XPSR format. The significant
 585              * differences are that the T bit is not in the same place, the
 586              * primask/faultmask info may be in the CPSR I and F bits, and
 587              * we do not want the mode bits.
 588              * We know that this cleanup happened before v8M, so there
 589              * is no complication with banked primask/faultmask.
 590              */
 591             uint32_t newval = val;
 592
 593             assert(!arm_feature(env, ARM_FEATURE_M_SECURITY));
 594
 595             newval &= (CPSR_NZCV | CPSR_Q | CPSR_IT | CPSR_GE);
 596             if (val & CPSR_T) {
 597                 newval |= XPSR_T;
 598             }
 599             /* If the I or F bits are set then this is a migration from
 600              * an old QEMU which still stored the M profile FAULTMASK
 601              * and PRIMASK in env->daif. For a new QEMU, the data is
 602              * transferred using the vmstate_m_faultmask_primask subsection.
 603              */
 604             if (val & CPSR_F) {
 605                 env->v7m.faultmask[M_REG_NS] = 1;
 606             }
 607             if (val & CPSR_I) {
 608                 env->v7m.primask[M_REG_NS] = 1;
 609             }
 610             val = newval;
 611         }
 612         /* Ignore the low bits, they are handled by vmstate_m. */
 613         xpsr_write(env, val, ~XPSR_EXCP);
 614         return 0;
 615     }
 616
 617     env->aarch64 = ((val & PSTATE_nRW) == 0);
 618
 619     if (is_a64(env)) {
 620         pstate_write(env, val);
 621         return 0;
 622     }
 623
 624     cpsr_write(env, val, 0xffffffff, CPSRWriteRaw);
 625     return 0;
 626 }
 627
 628 static int put_cpsr(QEMUFile *f, void *opaque, size_t size,
 629                     const VMStateField *field, JSONWriter *vmdesc)
 630 {
 631     ARMCPU *cpu = opaque;
 632     CPUARMState *env = &cpu->env;
 633     uint32_t val;
 634
 635     if (arm_feature(env, ARM_FEATURE_M)) {
 636         /* The low 9 bits are v7m.exception, which is handled by vmstate_m. */
 637         val = xpsr_read(env) & ~XPSR_EXCP;
 638     } else if (is_a64(env)) {
 639         val = pstate_read(env);
 640     } else {
 641         val = cpsr_read(env);
 642     }
 643
 644     qemu_put_be32(f, val);
 645     return 0;
 646 }
 647
 648 static const VMStateInfo vmstate_cpsr = {
 649     .name = "cpsr",
 650     .get = get_cpsr,
 651     .put = put_cpsr,
 652 };
 653
 654 static int get_power(QEMUFile *f, void *opaque, size_t size,
 655                     const VMStateField *field)
 656 {
 657     ARMCPU *cpu = opaque;
 658     bool powered_off = qemu_get_byte(f);
 659     cpu->power_state = powered_off ? PSCI_OFF : PSCI_ON;
 660     return 0;
 661 }
 662
 663 static int put_power(QEMUFile *f, void *opaque, size_t size,
 664                     const VMStateField *field, JSONWriter *vmdesc)
 665 {
 666     ARMCPU *cpu = opaque;
 667
 668     /* Migration should never happen while we transition power states */
 669
 670     if (cpu->power_state == PSCI_ON ||
 671         cpu->power_state == PSCI_OFF) {
 672         bool powered_off = (cpu->power_state == PSCI_OFF) ? true : false;
 673         qemu_put_byte(f, powered_off);
 674         return 0;
 675     } else {
 676         return 1;
 677     }
 678 }
 679
 680 static const VMStateInfo vmstate_powered_off = {
 681     .name = "powered_off",
 682     .get = get_power,
 683     .put = put_power,
 684 };
 685
 686 static int cpu_pre_save(void *opaque)
 687 {
 688     ARMCPU *cpu = opaque;
 689
 690     if (!kvm_enabled()) {
 691         pmu_op_start(&cpu->env);
 692     }
 693
 694     if (kvm_enabled()) {
 695         if (!write_kvmstate_to_list(cpu)) {
 696             /* This should never fail */
 697             g_assert_not_reached();
 698         }
 699
 700         /*
 701          * kvm_arm_cpu_pre_save() must be called after
 702          * write_kvmstate_to_list()
 703          */
 704         kvm_arm_cpu_pre_save(cpu);
 705     } else {
 706         if (!write_cpustate_to_list(cpu, false)) {
 707             /* This should never fail. */
 708             g_assert_not_reached();
 709         }
 710     }
 711
 712     cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len;
 713     memcpy(cpu->cpreg_vmstate_indexes, cpu->cpreg_indexes,
 714            cpu->cpreg_array_len * sizeof(uint64_t));
 715     memcpy(cpu->cpreg_vmstate_values, cpu->cpreg_values,
 716            cpu->cpreg_array_len * sizeof(uint64_t));
 717
 718     return 0;
 719 }
 720
 721 static int cpu_post_save(void *opaque)
 722 {
 723     ARMCPU *cpu = opaque;
 724
 725     if (!kvm_enabled()) {
 726         pmu_op_finish(&cpu->env);
 727     }
 728
 729     return 0;
 730 }
 731
 732 static int cpu_pre_load(void *opaque)
 733 {
 734     ARMCPU *cpu = opaque;
 735     CPUARMState *env = &cpu->env;
 736
 737     /*
 738      * Pre-initialize irq_line_state to a value that's never valid as
 739      * real data, so cpu_post_load() can tell whether we've seen the
 740      * irq-line-state subsection in the incoming migration state.
 741      */
 742     env->irq_line_state = UINT32_MAX;
 743
 744     if (!kvm_enabled()) {
 745         pmu_op_start(&cpu->env);
 746     }
 747
 748     return 0;
 749 }
 750
 751 static int cpu_post_load(void *opaque, int version_id)
 752 {
 753     ARMCPU *cpu = opaque;
 754     CPUARMState *env = &cpu->env;
 755     int i, v;
 756
 757     /*
 758      * Handle migration compatibility from old QEMU which didn't
 759      * send the irq-line-state subsection. A QEMU without it did not
 760      * implement the HCR_EL2.{VI,VF} bits as generating interrupts,
 761      * so for TCG the line state matches the bits set in cs->interrupt_request.
 762      * For KVM the line state is not stored in cs->interrupt_request
 763      * and so this will leave irq_line_state as 0, but this is OK because
 764      * we only need to care about it for TCG.
 765      */
 766     if (env->irq_line_state == UINT32_MAX) {
 767         CPUState *cs = CPU(cpu);
 768
 769         env->irq_line_state = cs->interrupt_request &
 770             (CPU_INTERRUPT_HARD | CPU_INTERRUPT_FIQ |
 771              CPU_INTERRUPT_VIRQ | CPU_INTERRUPT_VFIQ);
 772     }
 773
 774     /* Update the values list from the incoming migration data.
 775      * Anything in the incoming data which we don't know about is
 776      * a migration failure; anything we know about but the incoming
 777      * data doesn't specify retains its current (reset) value.
 778      * The indexes list remains untouched -- we only inspect the
 779      * incoming migration index list so we can match the values array
 780      * entries with the right slots in our own values array.
 781      */
 782
 783     for (i = 0, v = 0; i < cpu->cpreg_array_len
 784              && v < cpu->cpreg_vmstate_array_len; i++) {
 785         if (cpu->cpreg_vmstate_indexes[v] > cpu->cpreg_indexes[i]) {
 786             /* register in our list but not incoming : skip it */
 787             continue;
 788         }
 789         if (cpu->cpreg_vmstate_indexes[v] < cpu->cpreg_indexes[i]) {
 790             /* register in their list but not ours: fail migration */
 791             return -1;
 792         }
 793         /* matching register, copy the value over */
 794         cpu->cpreg_values[i] = cpu->cpreg_vmstate_values[v];
 795         v++;
 796     }
 797
 798     if (kvm_enabled()) {
 799         if (!write_list_to_kvmstate(cpu, KVM_PUT_FULL_STATE)) {
 800             return -1;
 801         }
 802         /* Note that it's OK for the TCG side not to know about
 803          * every register in the list; KVM is authoritative if
 804          * we're using it.
 805          */
 806         write_list_to_cpustate(cpu);
 807         kvm_arm_cpu_post_load(cpu);
 808     } else {
 809         if (!write_list_to_cpustate(cpu)) {
 810             return -1;
 811         }
 812     }
 813
 814     hw_breakpoint_update_all(cpu);
 815     hw_watchpoint_update_all(cpu);
 816
 817     /*
 818      * TCG gen_update_fp_context() relies on the invariant that
 819      * FPDSCR.LTPSIZE is constant 4 for M-profile with the LOB extension;
 820      * forbid bogus incoming data with some other value.
 821      */
 822     if (arm_feature(env, ARM_FEATURE_M) && cpu_isar_feature(aa32_lob, cpu)) {
 823         if (extract32(env->v7m.fpdscr[M_REG_NS],
 824                       FPCR_LTPSIZE_SHIFT, FPCR_LTPSIZE_LENGTH) != 4 ||
 825             extract32(env->v7m.fpdscr[M_REG_S],
 826                       FPCR_LTPSIZE_SHIFT, FPCR_LTPSIZE_LENGTH) != 4) {
 827             return -1;
 828         }
 829     }
 830
 831     /*
 832      * Misaligned thumb pc is architecturally impossible.
 833      * We have an assert in thumb_tr_translate_insn to verify this.
 834      * Fail an incoming migrate to avoid this assert.
 835      */
 836     if (!is_a64(env) && env->thumb && (env->regs[15] & 1)) {
 837         return -1;
 838     }
 839
 840     if (!kvm_enabled()) {
 841         pmu_op_finish(&cpu->env);
 842     }
 843     arm_rebuild_hflags(&cpu->env);
 844
 845     return 0;
 846 }
 847
 848 const VMStateDescription vmstate_arm_cpu = {
 849     .name = "cpu",
 850     .version_id = 22,
 851     .minimum_version_id = 22,
 852     .pre_save = cpu_pre_save,
 853     .post_save = cpu_post_save,
 854     .pre_load = cpu_pre_load,
 855     .post_load = cpu_post_load,
 856     .fields = (VMStateField[]) {
 857         VMSTATE_UINT32_ARRAY(env.regs, ARMCPU, 16),
 858         VMSTATE_UINT64_ARRAY(env.xregs, ARMCPU, 32),
 859         VMSTATE_UINT64(env.pc, ARMCPU),
 860         {
 861             .name = "cpsr",
 862             .version_id = 0,
 863             .size = sizeof(uint32_t),
 864             .info = &vmstate_cpsr,
 865             .flags = VMS_SINGLE,
 866             .offset = 0,
 867         },
 868         VMSTATE_UINT32(env.spsr, ARMCPU),
 869         VMSTATE_UINT64_ARRAY(env.banked_spsr, ARMCPU, 8),
 870         VMSTATE_UINT32_ARRAY(env.banked_r13, ARMCPU, 8),
 871         VMSTATE_UINT32_ARRAY(env.banked_r14, ARMCPU, 8),
 872         VMSTATE_UINT32_ARRAY(env.usr_regs, ARMCPU, 5),
 873         VMSTATE_UINT32_ARRAY(env.fiq_regs, ARMCPU, 5),
 874         VMSTATE_UINT64_ARRAY(env.elr_el, ARMCPU, 4),
 875         VMSTATE_UINT64_ARRAY(env.sp_el, ARMCPU, 4),
 876         /* The length-check must come before the arrays to avoid
 877          * incoming data possibly overflowing the array.
 878          */
 879         VMSTATE_INT32_POSITIVE_LE(cpreg_vmstate_array_len, ARMCPU),
 880         VMSTATE_VARRAY_INT32(cpreg_vmstate_indexes, ARMCPU,
 881                              cpreg_vmstate_array_len,
 882                              0, vmstate_info_uint64, uint64_t),
 883         VMSTATE_VARRAY_INT32(cpreg_vmstate_values, ARMCPU,
 884                              cpreg_vmstate_array_len,
 885                              0, vmstate_info_uint64, uint64_t),
 886         VMSTATE_UINT64(env.exclusive_addr, ARMCPU),
 887         VMSTATE_UINT64(env.exclusive_val, ARMCPU),
 888         VMSTATE_UINT64(env.exclusive_high, ARMCPU),
 889         VMSTATE_UNUSED(sizeof(uint64_t)),
 890         VMSTATE_UINT32(env.exception.syndrome, ARMCPU),
 891         VMSTATE_UINT32(env.exception.fsr, ARMCPU),
 892         VMSTATE_UINT64(env.exception.vaddress, ARMCPU),
 893         VMSTATE_TIMER_PTR(gt_timer[GTIMER_PHYS], ARMCPU),
 894         VMSTATE_TIMER_PTR(gt_timer[GTIMER_VIRT], ARMCPU),
 895         {
 896             .name = "power_state",
 897             .version_id = 0,
 898             .size = sizeof(bool),
 899             .info = &vmstate_powered_off,
 900             .flags = VMS_SINGLE,
 901             .offset = 0,
 902         },
 903         VMSTATE_END_OF_LIST()
 904     },
 905     .subsections = (const VMStateDescription*[]) {
 906         &vmstate_vfp,
 907         &vmstate_iwmmxt,
 908         &vmstate_m,
 909         &vmstate_thumb2ee,
 910         /* pmsav7_rnr must come before pmsav7 so that we have the
 911          * region number before we test it in the VMSTATE_VALIDATE
 912          * in vmstate_pmsav7.
 913          */
 914         &vmstate_pmsav7_rnr,
 915         &vmstate_pmsav7,
 916         &vmstate_pmsav8,
 917         &vmstate_m_security,
 918 #ifdef TARGET_AARCH64
 919         &vmstate_sve,
 920         &vmstate_za,
 921 #endif
 922         &vmstate_serror,
 923         &vmstate_irq_line_state,
 924         NULL
 925     }
 926 };