1 #include "qemu/osdep.h" 2 #include "cpu.h" 3 #include "qemu/error-report.h" 4 #include "sysemu/kvm.h" 5 #include "sysemu/tcg.h" 6 #include "kvm_arm.h" 7 #include "internals.h" 8 #include "cpu-features.h" 9 #include "migration/cpu.h" 10 #include "target/arm/gtimer.h" 11 12 static bool vfp_needed(void *opaque) 13 { 14 ARMCPU *cpu = opaque; 15 16 return (arm_feature(&cpu->env, ARM_FEATURE_AARCH64) 17 ? cpu_isar_feature(aa64_fp_simd, cpu) 18 : cpu_isar_feature(aa32_vfp_simd, cpu)); 19 } 20 21 static int get_fpscr(QEMUFile *f, void *opaque, size_t size, 22 const VMStateField *field) 23 { 24 ARMCPU *cpu = opaque; 25 CPUARMState *env = &cpu->env; 26 uint32_t val = qemu_get_be32(f); 27 28 vfp_set_fpscr(env, val); 29 return 0; 30 } 31 32 static int put_fpscr(QEMUFile *f, void *opaque, size_t size, 33 const VMStateField *field, JSONWriter *vmdesc) 34 { 35 ARMCPU *cpu = opaque; 36 CPUARMState *env = &cpu->env; 37 38 qemu_put_be32(f, vfp_get_fpscr(env)); 39 return 0; 40 } 41 42 static const VMStateInfo vmstate_fpscr = { 43 .name = "fpscr", 44 .get = get_fpscr, 45 .put = put_fpscr, 46 }; 47 48 static const VMStateDescription vmstate_vfp = { 49 .name = "cpu/vfp", 50 .version_id = 3, 51 .minimum_version_id = 3, 52 .needed = vfp_needed, 53 .fields = (const VMStateField[]) { 54 /* For compatibility, store Qn out of Zn here. */ 55 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[0].d, ARMCPU, 0, 2), 56 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[1].d, ARMCPU, 0, 2), 57 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[2].d, ARMCPU, 0, 2), 58 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[3].d, ARMCPU, 0, 2), 59 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[4].d, ARMCPU, 0, 2), 60 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[5].d, ARMCPU, 0, 2), 61 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[6].d, ARMCPU, 0, 2), 62 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[7].d, ARMCPU, 0, 2), 63 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[8].d, ARMCPU, 0, 2), 64 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[9].d, ARMCPU, 0, 2), 65 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[10].d, ARMCPU, 0, 2), 66 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[11].d, ARMCPU, 0, 2), 67 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[12].d, ARMCPU, 0, 2), 68 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[13].d, ARMCPU, 0, 2), 69 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[14].d, ARMCPU, 0, 2), 70 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[15].d, ARMCPU, 0, 2), 71 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[16].d, ARMCPU, 0, 2), 72 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[17].d, ARMCPU, 0, 2), 73 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[18].d, ARMCPU, 0, 2), 74 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[19].d, ARMCPU, 0, 2), 75 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[20].d, ARMCPU, 0, 2), 76 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[21].d, ARMCPU, 0, 2), 77 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[22].d, ARMCPU, 0, 2), 78 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[23].d, ARMCPU, 0, 2), 79 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[24].d, ARMCPU, 0, 2), 80 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[25].d, ARMCPU, 0, 2), 81 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[26].d, ARMCPU, 0, 2), 82 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[27].d, ARMCPU, 0, 2), 83 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[28].d, ARMCPU, 0, 2), 84 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[29].d, ARMCPU, 0, 2), 85 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[30].d, ARMCPU, 0, 2), 86 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[31].d, ARMCPU, 0, 2), 87 88 /* The xregs array is a little awkward because element 1 (FPSCR) 89 * requires a specific accessor, so we have to split it up in 90 * the vmstate: 91 */ 92 VMSTATE_UINT32(env.vfp.xregs[0], ARMCPU), 93 VMSTATE_UINT32_SUB_ARRAY(env.vfp.xregs, ARMCPU, 2, 14), 94 { 95 .name = "fpscr", 96 .version_id = 0, 97 .size = sizeof(uint32_t), 98 .info = &vmstate_fpscr, 99 .flags = VMS_SINGLE, 100 .offset = 0, 101 }, 102 VMSTATE_END_OF_LIST() 103 } 104 }; 105 106 static bool iwmmxt_needed(void *opaque) 107 { 108 ARMCPU *cpu = opaque; 109 CPUARMState *env = &cpu->env; 110 111 return arm_feature(env, ARM_FEATURE_IWMMXT); 112 } 113 114 static const VMStateDescription vmstate_iwmmxt = { 115 .name = "cpu/iwmmxt", 116 .version_id = 1, 117 .minimum_version_id = 1, 118 .needed = iwmmxt_needed, 119 .fields = (const VMStateField[]) { 120 VMSTATE_UINT64_ARRAY(env.iwmmxt.regs, ARMCPU, 16), 121 VMSTATE_UINT32_ARRAY(env.iwmmxt.cregs, ARMCPU, 16), 122 VMSTATE_END_OF_LIST() 123 } 124 }; 125 126 #ifdef TARGET_AARCH64 127 /* The expression ARM_MAX_VQ - 2 is 0 for pure AArch32 build, 128 * and ARMPredicateReg is actively empty. This triggers errors 129 * in the expansion of the VMSTATE macros. 130 */ 131 132 static bool sve_needed(void *opaque) 133 { 134 ARMCPU *cpu = opaque; 135 136 return cpu_isar_feature(aa64_sve, cpu); 137 } 138 139 /* The first two words of each Zreg is stored in VFP state. */ 140 static const VMStateDescription vmstate_zreg_hi_reg = { 141 .name = "cpu/sve/zreg_hi", 142 .version_id = 1, 143 .minimum_version_id = 1, 144 .fields = (const VMStateField[]) { 145 VMSTATE_UINT64_SUB_ARRAY(d, ARMVectorReg, 2, ARM_MAX_VQ - 2), 146 VMSTATE_END_OF_LIST() 147 } 148 }; 149 150 static const VMStateDescription vmstate_preg_reg = { 151 .name = "cpu/sve/preg", 152 .version_id = 1, 153 .minimum_version_id = 1, 154 .fields = (const VMStateField[]) { 155 VMSTATE_UINT64_ARRAY(p, ARMPredicateReg, 2 * ARM_MAX_VQ / 8), 156 VMSTATE_END_OF_LIST() 157 } 158 }; 159 160 static const VMStateDescription vmstate_sve = { 161 .name = "cpu/sve", 162 .version_id = 1, 163 .minimum_version_id = 1, 164 .needed = sve_needed, 165 .fields = (const VMStateField[]) { 166 VMSTATE_STRUCT_ARRAY(env.vfp.zregs, ARMCPU, 32, 0, 167 vmstate_zreg_hi_reg, ARMVectorReg), 168 VMSTATE_STRUCT_ARRAY(env.vfp.pregs, ARMCPU, 17, 0, 169 vmstate_preg_reg, ARMPredicateReg), 170 VMSTATE_END_OF_LIST() 171 } 172 }; 173 174 static const VMStateDescription vmstate_vreg = { 175 .name = "vreg", 176 .version_id = 1, 177 .minimum_version_id = 1, 178 .fields = (const VMStateField[]) { 179 VMSTATE_UINT64_ARRAY(d, ARMVectorReg, ARM_MAX_VQ * 2), 180 VMSTATE_END_OF_LIST() 181 } 182 }; 183 184 static bool za_needed(void *opaque) 185 { 186 ARMCPU *cpu = opaque; 187 188 /* 189 * When ZA storage is disabled, its contents are discarded. 190 * It will be zeroed when ZA storage is re-enabled. 191 */ 192 return FIELD_EX64(cpu->env.svcr, SVCR, ZA); 193 } 194 195 static const VMStateDescription vmstate_za = { 196 .name = "cpu/sme", 197 .version_id = 1, 198 .minimum_version_id = 1, 199 .needed = za_needed, 200 .fields = (const VMStateField[]) { 201 VMSTATE_STRUCT_ARRAY(env.zarray, ARMCPU, ARM_MAX_VQ * 16, 0, 202 vmstate_vreg, ARMVectorReg), 203 VMSTATE_END_OF_LIST() 204 } 205 }; 206 #endif /* AARCH64 */ 207 208 static bool serror_needed(void *opaque) 209 { 210 ARMCPU *cpu = opaque; 211 CPUARMState *env = &cpu->env; 212 213 return env->serror.pending != 0; 214 } 215 216 static const VMStateDescription vmstate_serror = { 217 .name = "cpu/serror", 218 .version_id = 1, 219 .minimum_version_id = 1, 220 .needed = serror_needed, 221 .fields = (const VMStateField[]) { 222 VMSTATE_UINT8(env.serror.pending, ARMCPU), 223 VMSTATE_UINT8(env.serror.has_esr, ARMCPU), 224 VMSTATE_UINT64(env.serror.esr, ARMCPU), 225 VMSTATE_END_OF_LIST() 226 } 227 }; 228 229 static bool irq_line_state_needed(void *opaque) 230 { 231 return true; 232 } 233 234 static const VMStateDescription vmstate_irq_line_state = { 235 .name = "cpu/irq-line-state", 236 .version_id = 1, 237 .minimum_version_id = 1, 238 .needed = irq_line_state_needed, 239 .fields = (const VMStateField[]) { 240 VMSTATE_UINT32(env.irq_line_state, ARMCPU), 241 VMSTATE_END_OF_LIST() 242 } 243 }; 244 245 static bool m_needed(void *opaque) 246 { 247 ARMCPU *cpu = opaque; 248 CPUARMState *env = &cpu->env; 249 250 return arm_feature(env, ARM_FEATURE_M); 251 } 252 253 static const VMStateDescription vmstate_m_faultmask_primask = { 254 .name = "cpu/m/faultmask-primask", 255 .version_id = 1, 256 .minimum_version_id = 1, 257 .needed = m_needed, 258 .fields = (const VMStateField[]) { 259 VMSTATE_UINT32(env.v7m.faultmask[M_REG_NS], ARMCPU), 260 VMSTATE_UINT32(env.v7m.primask[M_REG_NS], ARMCPU), 261 VMSTATE_END_OF_LIST() 262 } 263 }; 264 265 /* CSSELR is in a subsection because we didn't implement it previously. 266 * Migration from an old implementation will leave it at zero, which 267 * is OK since the only CPUs in the old implementation make the 268 * register RAZ/WI. 269 * Since there was no version of QEMU which implemented the CSSELR for 270 * just non-secure, we transfer both banks here rather than putting 271 * the secure banked version in the m-security subsection. 272 */ 273 static bool csselr_vmstate_validate(void *opaque, int version_id) 274 { 275 ARMCPU *cpu = opaque; 276 277 return cpu->env.v7m.csselr[M_REG_NS] <= R_V7M_CSSELR_INDEX_MASK 278 && cpu->env.v7m.csselr[M_REG_S] <= R_V7M_CSSELR_INDEX_MASK; 279 } 280 281 static bool m_csselr_needed(void *opaque) 282 { 283 ARMCPU *cpu = opaque; 284 285 return !arm_v7m_csselr_razwi(cpu); 286 } 287 288 static const VMStateDescription vmstate_m_csselr = { 289 .name = "cpu/m/csselr", 290 .version_id = 1, 291 .minimum_version_id = 1, 292 .needed = m_csselr_needed, 293 .fields = (const VMStateField[]) { 294 VMSTATE_UINT32_ARRAY(env.v7m.csselr, ARMCPU, M_REG_NUM_BANKS), 295 VMSTATE_VALIDATE("CSSELR is valid", csselr_vmstate_validate), 296 VMSTATE_END_OF_LIST() 297 } 298 }; 299 300 static const VMStateDescription vmstate_m_scr = { 301 .name = "cpu/m/scr", 302 .version_id = 1, 303 .minimum_version_id = 1, 304 .needed = m_needed, 305 .fields = (const VMStateField[]) { 306 VMSTATE_UINT32(env.v7m.scr[M_REG_NS], ARMCPU), 307 VMSTATE_END_OF_LIST() 308 } 309 }; 310 311 static const VMStateDescription vmstate_m_other_sp = { 312 .name = "cpu/m/other-sp", 313 .version_id = 1, 314 .minimum_version_id = 1, 315 .needed = m_needed, 316 .fields = (const VMStateField[]) { 317 VMSTATE_UINT32(env.v7m.other_sp, ARMCPU), 318 VMSTATE_END_OF_LIST() 319 } 320 }; 321 322 static bool m_v8m_needed(void *opaque) 323 { 324 ARMCPU *cpu = opaque; 325 CPUARMState *env = &cpu->env; 326 327 return arm_feature(env, ARM_FEATURE_M) && arm_feature(env, ARM_FEATURE_V8); 328 } 329 330 static const VMStateDescription vmstate_m_v8m = { 331 .name = "cpu/m/v8m", 332 .version_id = 1, 333 .minimum_version_id = 1, 334 .needed = m_v8m_needed, 335 .fields = (const VMStateField[]) { 336 VMSTATE_UINT32_ARRAY(env.v7m.msplim, ARMCPU, M_REG_NUM_BANKS), 337 VMSTATE_UINT32_ARRAY(env.v7m.psplim, ARMCPU, M_REG_NUM_BANKS), 338 VMSTATE_END_OF_LIST() 339 } 340 }; 341 342 static const VMStateDescription vmstate_m_fp = { 343 .name = "cpu/m/fp", 344 .version_id = 1, 345 .minimum_version_id = 1, 346 .needed = vfp_needed, 347 .fields = (const VMStateField[]) { 348 VMSTATE_UINT32_ARRAY(env.v7m.fpcar, ARMCPU, M_REG_NUM_BANKS), 349 VMSTATE_UINT32_ARRAY(env.v7m.fpccr, ARMCPU, M_REG_NUM_BANKS), 350 VMSTATE_UINT32_ARRAY(env.v7m.fpdscr, ARMCPU, M_REG_NUM_BANKS), 351 VMSTATE_UINT32_ARRAY(env.v7m.cpacr, ARMCPU, M_REG_NUM_BANKS), 352 VMSTATE_UINT32(env.v7m.nsacr, ARMCPU), 353 VMSTATE_END_OF_LIST() 354 } 355 }; 356 357 static bool mve_needed(void *opaque) 358 { 359 ARMCPU *cpu = opaque; 360 361 return cpu_isar_feature(aa32_mve, cpu); 362 } 363 364 static const VMStateDescription vmstate_m_mve = { 365 .name = "cpu/m/mve", 366 .version_id = 1, 367 .minimum_version_id = 1, 368 .needed = mve_needed, 369 .fields = (const VMStateField[]) { 370 VMSTATE_UINT32(env.v7m.vpr, ARMCPU), 371 VMSTATE_UINT32(env.v7m.ltpsize, ARMCPU), 372 VMSTATE_END_OF_LIST() 373 }, 374 }; 375 376 static const VMStateDescription vmstate_m = { 377 .name = "cpu/m", 378 .version_id = 4, 379 .minimum_version_id = 4, 380 .needed = m_needed, 381 .fields = (const VMStateField[]) { 382 VMSTATE_UINT32(env.v7m.vecbase[M_REG_NS], ARMCPU), 383 VMSTATE_UINT32(env.v7m.basepri[M_REG_NS], ARMCPU), 384 VMSTATE_UINT32(env.v7m.control[M_REG_NS], ARMCPU), 385 VMSTATE_UINT32(env.v7m.ccr[M_REG_NS], ARMCPU), 386 VMSTATE_UINT32(env.v7m.cfsr[M_REG_NS], ARMCPU), 387 VMSTATE_UINT32(env.v7m.hfsr, ARMCPU), 388 VMSTATE_UINT32(env.v7m.dfsr, ARMCPU), 389 VMSTATE_UINT32(env.v7m.mmfar[M_REG_NS], ARMCPU), 390 VMSTATE_UINT32(env.v7m.bfar, ARMCPU), 391 VMSTATE_UINT32(env.v7m.mpu_ctrl[M_REG_NS], ARMCPU), 392 VMSTATE_INT32(env.v7m.exception, ARMCPU), 393 VMSTATE_END_OF_LIST() 394 }, 395 .subsections = (const VMStateDescription * const []) { 396 &vmstate_m_faultmask_primask, 397 &vmstate_m_csselr, 398 &vmstate_m_scr, 399 &vmstate_m_other_sp, 400 &vmstate_m_v8m, 401 &vmstate_m_fp, 402 &vmstate_m_mve, 403 NULL 404 } 405 }; 406 407 static bool thumb2ee_needed(void *opaque) 408 { 409 ARMCPU *cpu = opaque; 410 CPUARMState *env = &cpu->env; 411 412 return arm_feature(env, ARM_FEATURE_THUMB2EE); 413 } 414 415 static const VMStateDescription vmstate_thumb2ee = { 416 .name = "cpu/thumb2ee", 417 .version_id = 1, 418 .minimum_version_id = 1, 419 .needed = thumb2ee_needed, 420 .fields = (const VMStateField[]) { 421 VMSTATE_UINT32(env.teecr, ARMCPU), 422 VMSTATE_UINT32(env.teehbr, ARMCPU), 423 VMSTATE_END_OF_LIST() 424 } 425 }; 426 427 static bool pmsav7_needed(void *opaque) 428 { 429 ARMCPU *cpu = opaque; 430 CPUARMState *env = &cpu->env; 431 432 return arm_feature(env, ARM_FEATURE_PMSA) && 433 arm_feature(env, ARM_FEATURE_V7) && 434 !arm_feature(env, ARM_FEATURE_V8); 435 } 436 437 static bool pmsav7_rgnr_vmstate_validate(void *opaque, int version_id) 438 { 439 ARMCPU *cpu = opaque; 440 441 return cpu->env.pmsav7.rnr[M_REG_NS] < cpu->pmsav7_dregion; 442 } 443 444 static const VMStateDescription vmstate_pmsav7 = { 445 .name = "cpu/pmsav7", 446 .version_id = 1, 447 .minimum_version_id = 1, 448 .needed = pmsav7_needed, 449 .fields = (const VMStateField[]) { 450 VMSTATE_VARRAY_UINT32(env.pmsav7.drbar, ARMCPU, pmsav7_dregion, 0, 451 vmstate_info_uint32, uint32_t), 452 VMSTATE_VARRAY_UINT32(env.pmsav7.drsr, ARMCPU, pmsav7_dregion, 0, 453 vmstate_info_uint32, uint32_t), 454 VMSTATE_VARRAY_UINT32(env.pmsav7.dracr, ARMCPU, pmsav7_dregion, 0, 455 vmstate_info_uint32, uint32_t), 456 VMSTATE_VALIDATE("rgnr is valid", pmsav7_rgnr_vmstate_validate), 457 VMSTATE_END_OF_LIST() 458 } 459 }; 460 461 static bool pmsav7_rnr_needed(void *opaque) 462 { 463 ARMCPU *cpu = opaque; 464 CPUARMState *env = &cpu->env; 465 466 /* For R profile cores pmsav7.rnr is migrated via the cpreg 467 * "RGNR" definition in helper.h. For M profile we have to 468 * migrate it separately. 469 */ 470 return arm_feature(env, ARM_FEATURE_M); 471 } 472 473 static const VMStateDescription vmstate_pmsav7_rnr = { 474 .name = "cpu/pmsav7-rnr", 475 .version_id = 1, 476 .minimum_version_id = 1, 477 .needed = pmsav7_rnr_needed, 478 .fields = (const VMStateField[]) { 479 VMSTATE_UINT32(env.pmsav7.rnr[M_REG_NS], ARMCPU), 480 VMSTATE_END_OF_LIST() 481 } 482 }; 483 484 static bool pmsav8_needed(void *opaque) 485 { 486 ARMCPU *cpu = opaque; 487 CPUARMState *env = &cpu->env; 488 489 return arm_feature(env, ARM_FEATURE_PMSA) && 490 arm_feature(env, ARM_FEATURE_V8); 491 } 492 493 static bool pmsav8r_needed(void *opaque) 494 { 495 ARMCPU *cpu = opaque; 496 CPUARMState *env = &cpu->env; 497 498 return arm_feature(env, ARM_FEATURE_PMSA) && 499 arm_feature(env, ARM_FEATURE_V8) && 500 !arm_feature(env, ARM_FEATURE_M); 501 } 502 503 static const VMStateDescription vmstate_pmsav8r = { 504 .name = "cpu/pmsav8/pmsav8r", 505 .version_id = 1, 506 .minimum_version_id = 1, 507 .needed = pmsav8r_needed, 508 .fields = (const VMStateField[]) { 509 VMSTATE_VARRAY_UINT32(env.pmsav8.hprbar, ARMCPU, 510 pmsav8r_hdregion, 0, vmstate_info_uint32, uint32_t), 511 VMSTATE_VARRAY_UINT32(env.pmsav8.hprlar, ARMCPU, 512 pmsav8r_hdregion, 0, vmstate_info_uint32, uint32_t), 513 VMSTATE_END_OF_LIST() 514 }, 515 }; 516 517 static const VMStateDescription vmstate_pmsav8 = { 518 .name = "cpu/pmsav8", 519 .version_id = 1, 520 .minimum_version_id = 1, 521 .needed = pmsav8_needed, 522 .fields = (const VMStateField[]) { 523 VMSTATE_VARRAY_UINT32(env.pmsav8.rbar[M_REG_NS], ARMCPU, pmsav7_dregion, 524 0, vmstate_info_uint32, uint32_t), 525 VMSTATE_VARRAY_UINT32(env.pmsav8.rlar[M_REG_NS], ARMCPU, pmsav7_dregion, 526 0, vmstate_info_uint32, uint32_t), 527 VMSTATE_UINT32(env.pmsav8.mair0[M_REG_NS], ARMCPU), 528 VMSTATE_UINT32(env.pmsav8.mair1[M_REG_NS], ARMCPU), 529 VMSTATE_END_OF_LIST() 530 }, 531 .subsections = (const VMStateDescription * const []) { 532 &vmstate_pmsav8r, 533 NULL 534 } 535 }; 536 537 static bool s_rnr_vmstate_validate(void *opaque, int version_id) 538 { 539 ARMCPU *cpu = opaque; 540 541 return cpu->env.pmsav7.rnr[M_REG_S] < cpu->pmsav7_dregion; 542 } 543 544 static bool sau_rnr_vmstate_validate(void *opaque, int version_id) 545 { 546 ARMCPU *cpu = opaque; 547 548 return cpu->env.sau.rnr < cpu->sau_sregion; 549 } 550 551 static bool m_security_needed(void *opaque) 552 { 553 ARMCPU *cpu = opaque; 554 CPUARMState *env = &cpu->env; 555 556 return arm_feature(env, ARM_FEATURE_M_SECURITY); 557 } 558 559 static const VMStateDescription vmstate_m_security = { 560 .name = "cpu/m-security", 561 .version_id = 1, 562 .minimum_version_id = 1, 563 .needed = m_security_needed, 564 .fields = (const VMStateField[]) { 565 VMSTATE_UINT32(env.v7m.secure, ARMCPU), 566 VMSTATE_UINT32(env.v7m.other_ss_msp, ARMCPU), 567 VMSTATE_UINT32(env.v7m.other_ss_psp, ARMCPU), 568 VMSTATE_UINT32(env.v7m.basepri[M_REG_S], ARMCPU), 569 VMSTATE_UINT32(env.v7m.primask[M_REG_S], ARMCPU), 570 VMSTATE_UINT32(env.v7m.faultmask[M_REG_S], ARMCPU), 571 VMSTATE_UINT32(env.v7m.control[M_REG_S], ARMCPU), 572 VMSTATE_UINT32(env.v7m.vecbase[M_REG_S], ARMCPU), 573 VMSTATE_UINT32(env.pmsav8.mair0[M_REG_S], ARMCPU), 574 VMSTATE_UINT32(env.pmsav8.mair1[M_REG_S], ARMCPU), 575 VMSTATE_VARRAY_UINT32(env.pmsav8.rbar[M_REG_S], ARMCPU, pmsav7_dregion, 576 0, vmstate_info_uint32, uint32_t), 577 VMSTATE_VARRAY_UINT32(env.pmsav8.rlar[M_REG_S], ARMCPU, pmsav7_dregion, 578 0, vmstate_info_uint32, uint32_t), 579 VMSTATE_UINT32(env.pmsav7.rnr[M_REG_S], ARMCPU), 580 VMSTATE_VALIDATE("secure MPU_RNR is valid", s_rnr_vmstate_validate), 581 VMSTATE_UINT32(env.v7m.mpu_ctrl[M_REG_S], ARMCPU), 582 VMSTATE_UINT32(env.v7m.ccr[M_REG_S], ARMCPU), 583 VMSTATE_UINT32(env.v7m.mmfar[M_REG_S], ARMCPU), 584 VMSTATE_UINT32(env.v7m.cfsr[M_REG_S], ARMCPU), 585 VMSTATE_UINT32(env.v7m.sfsr, ARMCPU), 586 VMSTATE_UINT32(env.v7m.sfar, ARMCPU), 587 VMSTATE_VARRAY_UINT32(env.sau.rbar, ARMCPU, sau_sregion, 0, 588 vmstate_info_uint32, uint32_t), 589 VMSTATE_VARRAY_UINT32(env.sau.rlar, ARMCPU, sau_sregion, 0, 590 vmstate_info_uint32, uint32_t), 591 VMSTATE_UINT32(env.sau.rnr, ARMCPU), 592 VMSTATE_VALIDATE("SAU_RNR is valid", sau_rnr_vmstate_validate), 593 VMSTATE_UINT32(env.sau.ctrl, ARMCPU), 594 VMSTATE_UINT32(env.v7m.scr[M_REG_S], ARMCPU), 595 /* AIRCR is not secure-only, but our implementation is R/O if the 596 * security extension is unimplemented, so we migrate it here. 597 */ 598 VMSTATE_UINT32(env.v7m.aircr, ARMCPU), 599 VMSTATE_END_OF_LIST() 600 } 601 }; 602 603 static int get_cpsr(QEMUFile *f, void *opaque, size_t size, 604 const VMStateField *field) 605 { 606 ARMCPU *cpu = opaque; 607 CPUARMState *env = &cpu->env; 608 uint32_t val = qemu_get_be32(f); 609 610 if (arm_feature(env, ARM_FEATURE_M)) { 611 if (val & XPSR_EXCP) { 612 /* This is a CPSR format value from an older QEMU. (We can tell 613 * because values transferred in XPSR format always have zero 614 * for the EXCP field, and CPSR format will always have bit 4 615 * set in CPSR_M.) Rearrange it into XPSR format. The significant 616 * differences are that the T bit is not in the same place, the 617 * primask/faultmask info may be in the CPSR I and F bits, and 618 * we do not want the mode bits. 619 * We know that this cleanup happened before v8M, so there 620 * is no complication with banked primask/faultmask. 621 */ 622 uint32_t newval = val; 623 624 assert(!arm_feature(env, ARM_FEATURE_M_SECURITY)); 625 626 newval &= (CPSR_NZCV | CPSR_Q | CPSR_IT | CPSR_GE); 627 if (val & CPSR_T) { 628 newval |= XPSR_T; 629 } 630 /* If the I or F bits are set then this is a migration from 631 * an old QEMU which still stored the M profile FAULTMASK 632 * and PRIMASK in env->daif. For a new QEMU, the data is 633 * transferred using the vmstate_m_faultmask_primask subsection. 634 */ 635 if (val & CPSR_F) { 636 env->v7m.faultmask[M_REG_NS] = 1; 637 } 638 if (val & CPSR_I) { 639 env->v7m.primask[M_REG_NS] = 1; 640 } 641 val = newval; 642 } 643 /* Ignore the low bits, they are handled by vmstate_m. */ 644 xpsr_write(env, val, ~XPSR_EXCP); 645 return 0; 646 } 647 648 env->aarch64 = ((val & PSTATE_nRW) == 0); 649 650 if (is_a64(env)) { 651 pstate_write(env, val); 652 return 0; 653 } 654 655 cpsr_write(env, val, 0xffffffff, CPSRWriteRaw); 656 return 0; 657 } 658 659 static int put_cpsr(QEMUFile *f, void *opaque, size_t size, 660 const VMStateField *field, JSONWriter *vmdesc) 661 { 662 ARMCPU *cpu = opaque; 663 CPUARMState *env = &cpu->env; 664 uint32_t val; 665 666 if (arm_feature(env, ARM_FEATURE_M)) { 667 /* The low 9 bits are v7m.exception, which is handled by vmstate_m. */ 668 val = xpsr_read(env) & ~XPSR_EXCP; 669 } else if (is_a64(env)) { 670 val = pstate_read(env); 671 } else { 672 val = cpsr_read(env); 673 } 674 675 qemu_put_be32(f, val); 676 return 0; 677 } 678 679 static const VMStateInfo vmstate_cpsr = { 680 .name = "cpsr", 681 .get = get_cpsr, 682 .put = put_cpsr, 683 }; 684 685 static int get_power(QEMUFile *f, void *opaque, size_t size, 686 const VMStateField *field) 687 { 688 ARMCPU *cpu = opaque; 689 bool powered_off = qemu_get_byte(f); 690 cpu->power_state = powered_off ? PSCI_OFF : PSCI_ON; 691 return 0; 692 } 693 694 static int put_power(QEMUFile *f, void *opaque, size_t size, 695 const VMStateField *field, JSONWriter *vmdesc) 696 { 697 ARMCPU *cpu = opaque; 698 699 /* Migration should never happen while we transition power states */ 700 701 if (cpu->power_state == PSCI_ON || 702 cpu->power_state == PSCI_OFF) { 703 bool powered_off = (cpu->power_state == PSCI_OFF) ? true : false; 704 qemu_put_byte(f, powered_off); 705 return 0; 706 } else { 707 return 1; 708 } 709 } 710 711 static const VMStateInfo vmstate_powered_off = { 712 .name = "powered_off", 713 .get = get_power, 714 .put = put_power, 715 }; 716 717 static int cpu_pre_save(void *opaque) 718 { 719 ARMCPU *cpu = opaque; 720 721 if (!kvm_enabled()) { 722 pmu_op_start(&cpu->env); 723 } 724 725 if (kvm_enabled()) { 726 if (!write_kvmstate_to_list(cpu)) { 727 /* This should never fail */ 728 g_assert_not_reached(); 729 } 730 731 /* 732 * kvm_arm_cpu_pre_save() must be called after 733 * write_kvmstate_to_list() 734 */ 735 kvm_arm_cpu_pre_save(cpu); 736 } else { 737 if (!write_cpustate_to_list(cpu, false)) { 738 /* This should never fail. */ 739 g_assert_not_reached(); 740 } 741 } 742 743 cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len; 744 memcpy(cpu->cpreg_vmstate_indexes, cpu->cpreg_indexes, 745 cpu->cpreg_array_len * sizeof(uint64_t)); 746 memcpy(cpu->cpreg_vmstate_values, cpu->cpreg_values, 747 cpu->cpreg_array_len * sizeof(uint64_t)); 748 749 return 0; 750 } 751 752 static int cpu_post_save(void *opaque) 753 { 754 ARMCPU *cpu = opaque; 755 756 if (!kvm_enabled()) { 757 pmu_op_finish(&cpu->env); 758 } 759 760 return 0; 761 } 762 763 static int cpu_pre_load(void *opaque) 764 { 765 ARMCPU *cpu = opaque; 766 CPUARMState *env = &cpu->env; 767 768 /* 769 * Pre-initialize irq_line_state to a value that's never valid as 770 * real data, so cpu_post_load() can tell whether we've seen the 771 * irq-line-state subsection in the incoming migration state. 772 */ 773 env->irq_line_state = UINT32_MAX; 774 775 if (!kvm_enabled()) { 776 pmu_op_start(&cpu->env); 777 } 778 779 return 0; 780 } 781 782 static int cpu_post_load(void *opaque, int version_id) 783 { 784 ARMCPU *cpu = opaque; 785 CPUARMState *env = &cpu->env; 786 int i, v; 787 788 /* 789 * Handle migration compatibility from old QEMU which didn't 790 * send the irq-line-state subsection. A QEMU without it did not 791 * implement the HCR_EL2.{VI,VF} bits as generating interrupts, 792 * so for TCG the line state matches the bits set in cs->interrupt_request. 793 * For KVM the line state is not stored in cs->interrupt_request 794 * and so this will leave irq_line_state as 0, but this is OK because 795 * we only need to care about it for TCG. 796 */ 797 if (env->irq_line_state == UINT32_MAX) { 798 CPUState *cs = CPU(cpu); 799 800 env->irq_line_state = cs->interrupt_request & 801 (CPU_INTERRUPT_HARD | CPU_INTERRUPT_FIQ | 802 CPU_INTERRUPT_VIRQ | CPU_INTERRUPT_VFIQ); 803 } 804 805 /* Update the values list from the incoming migration data. 806 * Anything in the incoming data which we don't know about is 807 * a migration failure; anything we know about but the incoming 808 * data doesn't specify retains its current (reset) value. 809 * The indexes list remains untouched -- we only inspect the 810 * incoming migration index list so we can match the values array 811 * entries with the right slots in our own values array. 812 */ 813 814 for (i = 0, v = 0; i < cpu->cpreg_array_len 815 && v < cpu->cpreg_vmstate_array_len; i++) { 816 if (cpu->cpreg_vmstate_indexes[v] > cpu->cpreg_indexes[i]) { 817 /* register in our list but not incoming : skip it */ 818 continue; 819 } 820 if (cpu->cpreg_vmstate_indexes[v] < cpu->cpreg_indexes[i]) { 821 /* register in their list but not ours: fail migration */ 822 return -1; 823 } 824 /* matching register, copy the value over */ 825 cpu->cpreg_values[i] = cpu->cpreg_vmstate_values[v]; 826 v++; 827 } 828 829 if (kvm_enabled()) { 830 if (!write_list_to_kvmstate(cpu, KVM_PUT_FULL_STATE)) { 831 return -1; 832 } 833 /* Note that it's OK for the TCG side not to know about 834 * every register in the list; KVM is authoritative if 835 * we're using it. 836 */ 837 write_list_to_cpustate(cpu); 838 kvm_arm_cpu_post_load(cpu); 839 } else { 840 if (!write_list_to_cpustate(cpu)) { 841 return -1; 842 } 843 } 844 845 /* 846 * Misaligned thumb pc is architecturally impossible. Fail the 847 * incoming migration. For TCG it would trigger the assert in 848 * thumb_tr_translate_insn(). 849 */ 850 if (!is_a64(env) && env->thumb && (env->regs[15] & 1)) { 851 return -1; 852 } 853 854 if (tcg_enabled()) { 855 hw_breakpoint_update_all(cpu); 856 hw_watchpoint_update_all(cpu); 857 } 858 859 /* 860 * TCG gen_update_fp_context() relies on the invariant that 861 * FPDSCR.LTPSIZE is constant 4 for M-profile with the LOB extension; 862 * forbid bogus incoming data with some other value. 863 */ 864 if (arm_feature(env, ARM_FEATURE_M) && cpu_isar_feature(aa32_lob, cpu)) { 865 if (extract32(env->v7m.fpdscr[M_REG_NS], 866 FPCR_LTPSIZE_SHIFT, FPCR_LTPSIZE_LENGTH) != 4 || 867 extract32(env->v7m.fpdscr[M_REG_S], 868 FPCR_LTPSIZE_SHIFT, FPCR_LTPSIZE_LENGTH) != 4) { 869 return -1; 870 } 871 } 872 873 if (!kvm_enabled()) { 874 pmu_op_finish(&cpu->env); 875 } 876 877 if (tcg_enabled()) { 878 arm_rebuild_hflags(&cpu->env); 879 } 880 881 return 0; 882 } 883 884 const VMStateDescription vmstate_arm_cpu = { 885 .name = "cpu", 886 .version_id = 22, 887 .minimum_version_id = 22, 888 .pre_save = cpu_pre_save, 889 .post_save = cpu_post_save, 890 .pre_load = cpu_pre_load, 891 .post_load = cpu_post_load, 892 .fields = (const VMStateField[]) { 893 VMSTATE_UINT32_ARRAY(env.regs, ARMCPU, 16), 894 VMSTATE_UINT64_ARRAY(env.xregs, ARMCPU, 32), 895 VMSTATE_UINT64(env.pc, ARMCPU), 896 { 897 .name = "cpsr", 898 .version_id = 0, 899 .size = sizeof(uint32_t), 900 .info = &vmstate_cpsr, 901 .flags = VMS_SINGLE, 902 .offset = 0, 903 }, 904 VMSTATE_UINT32(env.spsr, ARMCPU), 905 VMSTATE_UINT64_ARRAY(env.banked_spsr, ARMCPU, 8), 906 VMSTATE_UINT32_ARRAY(env.banked_r13, ARMCPU, 8), 907 VMSTATE_UINT32_ARRAY(env.banked_r14, ARMCPU, 8), 908 VMSTATE_UINT32_ARRAY(env.usr_regs, ARMCPU, 5), 909 VMSTATE_UINT32_ARRAY(env.fiq_regs, ARMCPU, 5), 910 VMSTATE_UINT64_ARRAY(env.elr_el, ARMCPU, 4), 911 VMSTATE_UINT64_ARRAY(env.sp_el, ARMCPU, 4), 912 /* The length-check must come before the arrays to avoid 913 * incoming data possibly overflowing the array. 914 */ 915 VMSTATE_INT32_POSITIVE_LE(cpreg_vmstate_array_len, ARMCPU), 916 VMSTATE_VARRAY_INT32(cpreg_vmstate_indexes, ARMCPU, 917 cpreg_vmstate_array_len, 918 0, vmstate_info_uint64, uint64_t), 919 VMSTATE_VARRAY_INT32(cpreg_vmstate_values, ARMCPU, 920 cpreg_vmstate_array_len, 921 0, vmstate_info_uint64, uint64_t), 922 VMSTATE_UINT64(env.exclusive_addr, ARMCPU), 923 VMSTATE_UINT64(env.exclusive_val, ARMCPU), 924 VMSTATE_UINT64(env.exclusive_high, ARMCPU), 925 VMSTATE_UNUSED(sizeof(uint64_t)), 926 VMSTATE_UINT32(env.exception.syndrome, ARMCPU), 927 VMSTATE_UINT32(env.exception.fsr, ARMCPU), 928 VMSTATE_UINT64(env.exception.vaddress, ARMCPU), 929 VMSTATE_TIMER_PTR(gt_timer[GTIMER_PHYS], ARMCPU), 930 VMSTATE_TIMER_PTR(gt_timer[GTIMER_VIRT], ARMCPU), 931 { 932 .name = "power_state", 933 .version_id = 0, 934 .size = sizeof(bool), 935 .info = &vmstate_powered_off, 936 .flags = VMS_SINGLE, 937 .offset = 0, 938 }, 939 VMSTATE_END_OF_LIST() 940 }, 941 .subsections = (const VMStateDescription * const []) { 942 &vmstate_vfp, 943 &vmstate_iwmmxt, 944 &vmstate_m, 945 &vmstate_thumb2ee, 946 /* pmsav7_rnr must come before pmsav7 so that we have the 947 * region number before we test it in the VMSTATE_VALIDATE 948 * in vmstate_pmsav7. 949 */ 950 &vmstate_pmsav7_rnr, 951 &vmstate_pmsav7, 952 &vmstate_pmsav8, 953 &vmstate_m_security, 954 #ifdef TARGET_AARCH64 955 &vmstate_sve, 956 &vmstate_za, 957 #endif 958 &vmstate_serror, 959 &vmstate_irq_line_state, 960 NULL 961 } 962 }; 963