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 CPUARMState *env = &cpu->env; 13 14 return arm_feature(env, ARM_FEATURE_VFP); 15 } 16 17 static int get_fpscr(QEMUFile *f, void *opaque, size_t size, 18 const VMStateField *field) 19 { 20 ARMCPU *cpu = opaque; 21 CPUARMState *env = &cpu->env; 22 uint32_t val = qemu_get_be32(f); 23 24 vfp_set_fpscr(env, val); 25 return 0; 26 } 27 28 static int put_fpscr(QEMUFile *f, void *opaque, size_t size, 29 const VMStateField *field, QJSON *vmdesc) 30 { 31 ARMCPU *cpu = opaque; 32 CPUARMState *env = &cpu->env; 33 34 qemu_put_be32(f, vfp_get_fpscr(env)); 35 return 0; 36 } 37 38 static const VMStateInfo vmstate_fpscr = { 39 .name = "fpscr", 40 .get = get_fpscr, 41 .put = put_fpscr, 42 }; 43 44 static const VMStateDescription vmstate_vfp = { 45 .name = "cpu/vfp", 46 .version_id = 3, 47 .minimum_version_id = 3, 48 .needed = vfp_needed, 49 .fields = (VMStateField[]) { 50 /* For compatibility, store Qn out of Zn here. */ 51 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[0].d, ARMCPU, 0, 2), 52 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[1].d, ARMCPU, 0, 2), 53 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[2].d, ARMCPU, 0, 2), 54 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[3].d, ARMCPU, 0, 2), 55 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[4].d, ARMCPU, 0, 2), 56 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[5].d, ARMCPU, 0, 2), 57 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[6].d, ARMCPU, 0, 2), 58 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[7].d, ARMCPU, 0, 2), 59 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[8].d, ARMCPU, 0, 2), 60 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[9].d, ARMCPU, 0, 2), 61 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[10].d, ARMCPU, 0, 2), 62 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[11].d, ARMCPU, 0, 2), 63 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[12].d, ARMCPU, 0, 2), 64 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[13].d, ARMCPU, 0, 2), 65 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[14].d, ARMCPU, 0, 2), 66 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[15].d, ARMCPU, 0, 2), 67 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[16].d, ARMCPU, 0, 2), 68 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[17].d, ARMCPU, 0, 2), 69 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[18].d, ARMCPU, 0, 2), 70 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[19].d, ARMCPU, 0, 2), 71 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[20].d, ARMCPU, 0, 2), 72 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[21].d, ARMCPU, 0, 2), 73 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[22].d, ARMCPU, 0, 2), 74 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[23].d, ARMCPU, 0, 2), 75 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[24].d, ARMCPU, 0, 2), 76 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[25].d, ARMCPU, 0, 2), 77 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[26].d, ARMCPU, 0, 2), 78 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[27].d, ARMCPU, 0, 2), 79 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[28].d, ARMCPU, 0, 2), 80 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[29].d, ARMCPU, 0, 2), 81 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[30].d, ARMCPU, 0, 2), 82 VMSTATE_UINT64_SUB_ARRAY(env.vfp.zregs[31].d, ARMCPU, 0, 2), 83 84 /* The xregs array is a little awkward because element 1 (FPSCR) 85 * requires a specific accessor, so we have to split it up in 86 * the vmstate: 87 */ 88 VMSTATE_UINT32(env.vfp.xregs[0], ARMCPU), 89 VMSTATE_UINT32_SUB_ARRAY(env.vfp.xregs, ARMCPU, 2, 14), 90 { 91 .name = "fpscr", 92 .version_id = 0, 93 .size = sizeof(uint32_t), 94 .info = &vmstate_fpscr, 95 .flags = VMS_SINGLE, 96 .offset = 0, 97 }, 98 VMSTATE_END_OF_LIST() 99 } 100 }; 101 102 static bool iwmmxt_needed(void *opaque) 103 { 104 ARMCPU *cpu = opaque; 105 CPUARMState *env = &cpu->env; 106 107 return arm_feature(env, ARM_FEATURE_IWMMXT); 108 } 109 110 static const VMStateDescription vmstate_iwmmxt = { 111 .name = "cpu/iwmmxt", 112 .version_id = 1, 113 .minimum_version_id = 1, 114 .needed = iwmmxt_needed, 115 .fields = (VMStateField[]) { 116 VMSTATE_UINT64_ARRAY(env.iwmmxt.regs, ARMCPU, 16), 117 VMSTATE_UINT32_ARRAY(env.iwmmxt.cregs, ARMCPU, 16), 118 VMSTATE_END_OF_LIST() 119 } 120 }; 121 122 #ifdef TARGET_AARCH64 123 /* The expression ARM_MAX_VQ - 2 is 0 for pure AArch32 build, 124 * and ARMPredicateReg is actively empty. This triggers errors 125 * in the expansion of the VMSTATE macros. 126 */ 127 128 static bool sve_needed(void *opaque) 129 { 130 ARMCPU *cpu = opaque; 131 132 return cpu_isar_feature(aa64_sve, cpu); 133 } 134 135 /* The first two words of each Zreg is stored in VFP state. */ 136 static const VMStateDescription vmstate_zreg_hi_reg = { 137 .name = "cpu/sve/zreg_hi", 138 .version_id = 1, 139 .minimum_version_id = 1, 140 .fields = (VMStateField[]) { 141 VMSTATE_UINT64_SUB_ARRAY(d, ARMVectorReg, 2, ARM_MAX_VQ - 2), 142 VMSTATE_END_OF_LIST() 143 } 144 }; 145 146 static const VMStateDescription vmstate_preg_reg = { 147 .name = "cpu/sve/preg", 148 .version_id = 1, 149 .minimum_version_id = 1, 150 .fields = (VMStateField[]) { 151 VMSTATE_UINT64_ARRAY(p, ARMPredicateReg, 2 * ARM_MAX_VQ / 8), 152 VMSTATE_END_OF_LIST() 153 } 154 }; 155 156 static const VMStateDescription vmstate_sve = { 157 .name = "cpu/sve", 158 .version_id = 1, 159 .minimum_version_id = 1, 160 .needed = sve_needed, 161 .fields = (VMStateField[]) { 162 VMSTATE_STRUCT_ARRAY(env.vfp.zregs, ARMCPU, 32, 0, 163 vmstate_zreg_hi_reg, ARMVectorReg), 164 VMSTATE_STRUCT_ARRAY(env.vfp.pregs, ARMCPU, 17, 0, 165 vmstate_preg_reg, ARMPredicateReg), 166 VMSTATE_END_OF_LIST() 167 } 168 }; 169 #endif /* AARCH64 */ 170 171 static bool serror_needed(void *opaque) 172 { 173 ARMCPU *cpu = opaque; 174 CPUARMState *env = &cpu->env; 175 176 return env->serror.pending != 0; 177 } 178 179 static const VMStateDescription vmstate_serror = { 180 .name = "cpu/serror", 181 .version_id = 1, 182 .minimum_version_id = 1, 183 .needed = serror_needed, 184 .fields = (VMStateField[]) { 185 VMSTATE_UINT8(env.serror.pending, ARMCPU), 186 VMSTATE_UINT8(env.serror.has_esr, ARMCPU), 187 VMSTATE_UINT64(env.serror.esr, ARMCPU), 188 VMSTATE_END_OF_LIST() 189 } 190 }; 191 192 static bool irq_line_state_needed(void *opaque) 193 { 194 return true; 195 } 196 197 static const VMStateDescription vmstate_irq_line_state = { 198 .name = "cpu/irq-line-state", 199 .version_id = 1, 200 .minimum_version_id = 1, 201 .needed = irq_line_state_needed, 202 .fields = (VMStateField[]) { 203 VMSTATE_UINT32(env.irq_line_state, ARMCPU), 204 VMSTATE_END_OF_LIST() 205 } 206 }; 207 208 static bool m_needed(void *opaque) 209 { 210 ARMCPU *cpu = opaque; 211 CPUARMState *env = &cpu->env; 212 213 return arm_feature(env, ARM_FEATURE_M); 214 } 215 216 static const VMStateDescription vmstate_m_faultmask_primask = { 217 .name = "cpu/m/faultmask-primask", 218 .version_id = 1, 219 .minimum_version_id = 1, 220 .needed = m_needed, 221 .fields = (VMStateField[]) { 222 VMSTATE_UINT32(env.v7m.faultmask[M_REG_NS], ARMCPU), 223 VMSTATE_UINT32(env.v7m.primask[M_REG_NS], ARMCPU), 224 VMSTATE_END_OF_LIST() 225 } 226 }; 227 228 /* CSSELR is in a subsection because we didn't implement it previously. 229 * Migration from an old implementation will leave it at zero, which 230 * is OK since the only CPUs in the old implementation make the 231 * register RAZ/WI. 232 * Since there was no version of QEMU which implemented the CSSELR for 233 * just non-secure, we transfer both banks here rather than putting 234 * the secure banked version in the m-security subsection. 235 */ 236 static bool csselr_vmstate_validate(void *opaque, int version_id) 237 { 238 ARMCPU *cpu = opaque; 239 240 return cpu->env.v7m.csselr[M_REG_NS] <= R_V7M_CSSELR_INDEX_MASK 241 && cpu->env.v7m.csselr[M_REG_S] <= R_V7M_CSSELR_INDEX_MASK; 242 } 243 244 static bool m_csselr_needed(void *opaque) 245 { 246 ARMCPU *cpu = opaque; 247 248 return !arm_v7m_csselr_razwi(cpu); 249 } 250 251 static const VMStateDescription vmstate_m_csselr = { 252 .name = "cpu/m/csselr", 253 .version_id = 1, 254 .minimum_version_id = 1, 255 .needed = m_csselr_needed, 256 .fields = (VMStateField[]) { 257 VMSTATE_UINT32_ARRAY(env.v7m.csselr, ARMCPU, M_REG_NUM_BANKS), 258 VMSTATE_VALIDATE("CSSELR is valid", csselr_vmstate_validate), 259 VMSTATE_END_OF_LIST() 260 } 261 }; 262 263 static const VMStateDescription vmstate_m_scr = { 264 .name = "cpu/m/scr", 265 .version_id = 1, 266 .minimum_version_id = 1, 267 .needed = m_needed, 268 .fields = (VMStateField[]) { 269 VMSTATE_UINT32(env.v7m.scr[M_REG_NS], ARMCPU), 270 VMSTATE_END_OF_LIST() 271 } 272 }; 273 274 static const VMStateDescription vmstate_m_other_sp = { 275 .name = "cpu/m/other-sp", 276 .version_id = 1, 277 .minimum_version_id = 1, 278 .needed = m_needed, 279 .fields = (VMStateField[]) { 280 VMSTATE_UINT32(env.v7m.other_sp, ARMCPU), 281 VMSTATE_END_OF_LIST() 282 } 283 }; 284 285 static bool m_v8m_needed(void *opaque) 286 { 287 ARMCPU *cpu = opaque; 288 CPUARMState *env = &cpu->env; 289 290 return arm_feature(env, ARM_FEATURE_M) && arm_feature(env, ARM_FEATURE_V8); 291 } 292 293 static const VMStateDescription vmstate_m_v8m = { 294 .name = "cpu/m/v8m", 295 .version_id = 1, 296 .minimum_version_id = 1, 297 .needed = m_v8m_needed, 298 .fields = (VMStateField[]) { 299 VMSTATE_UINT32_ARRAY(env.v7m.msplim, ARMCPU, M_REG_NUM_BANKS), 300 VMSTATE_UINT32_ARRAY(env.v7m.psplim, ARMCPU, M_REG_NUM_BANKS), 301 VMSTATE_END_OF_LIST() 302 } 303 }; 304 305 static const VMStateDescription vmstate_m_fp = { 306 .name = "cpu/m/fp", 307 .version_id = 1, 308 .minimum_version_id = 1, 309 .needed = vfp_needed, 310 .fields = (VMStateField[]) { 311 VMSTATE_UINT32_ARRAY(env.v7m.fpcar, ARMCPU, M_REG_NUM_BANKS), 312 VMSTATE_UINT32_ARRAY(env.v7m.fpccr, ARMCPU, M_REG_NUM_BANKS), 313 VMSTATE_UINT32_ARRAY(env.v7m.fpdscr, ARMCPU, M_REG_NUM_BANKS), 314 VMSTATE_UINT32_ARRAY(env.v7m.cpacr, ARMCPU, M_REG_NUM_BANKS), 315 VMSTATE_UINT32(env.v7m.nsacr, ARMCPU), 316 VMSTATE_END_OF_LIST() 317 } 318 }; 319 320 static const VMStateDescription vmstate_m = { 321 .name = "cpu/m", 322 .version_id = 4, 323 .minimum_version_id = 4, 324 .needed = m_needed, 325 .fields = (VMStateField[]) { 326 VMSTATE_UINT32(env.v7m.vecbase[M_REG_NS], ARMCPU), 327 VMSTATE_UINT32(env.v7m.basepri[M_REG_NS], ARMCPU), 328 VMSTATE_UINT32(env.v7m.control[M_REG_NS], ARMCPU), 329 VMSTATE_UINT32(env.v7m.ccr[M_REG_NS], ARMCPU), 330 VMSTATE_UINT32(env.v7m.cfsr[M_REG_NS], ARMCPU), 331 VMSTATE_UINT32(env.v7m.hfsr, ARMCPU), 332 VMSTATE_UINT32(env.v7m.dfsr, ARMCPU), 333 VMSTATE_UINT32(env.v7m.mmfar[M_REG_NS], ARMCPU), 334 VMSTATE_UINT32(env.v7m.bfar, ARMCPU), 335 VMSTATE_UINT32(env.v7m.mpu_ctrl[M_REG_NS], ARMCPU), 336 VMSTATE_INT32(env.v7m.exception, ARMCPU), 337 VMSTATE_END_OF_LIST() 338 }, 339 .subsections = (const VMStateDescription*[]) { 340 &vmstate_m_faultmask_primask, 341 &vmstate_m_csselr, 342 &vmstate_m_scr, 343 &vmstate_m_other_sp, 344 &vmstate_m_v8m, 345 &vmstate_m_fp, 346 NULL 347 } 348 }; 349 350 static bool thumb2ee_needed(void *opaque) 351 { 352 ARMCPU *cpu = opaque; 353 CPUARMState *env = &cpu->env; 354 355 return arm_feature(env, ARM_FEATURE_THUMB2EE); 356 } 357 358 static const VMStateDescription vmstate_thumb2ee = { 359 .name = "cpu/thumb2ee", 360 .version_id = 1, 361 .minimum_version_id = 1, 362 .needed = thumb2ee_needed, 363 .fields = (VMStateField[]) { 364 VMSTATE_UINT32(env.teecr, ARMCPU), 365 VMSTATE_UINT32(env.teehbr, ARMCPU), 366 VMSTATE_END_OF_LIST() 367 } 368 }; 369 370 static bool pmsav7_needed(void *opaque) 371 { 372 ARMCPU *cpu = opaque; 373 CPUARMState *env = &cpu->env; 374 375 return arm_feature(env, ARM_FEATURE_PMSA) && 376 arm_feature(env, ARM_FEATURE_V7) && 377 !arm_feature(env, ARM_FEATURE_V8); 378 } 379 380 static bool pmsav7_rgnr_vmstate_validate(void *opaque, int version_id) 381 { 382 ARMCPU *cpu = opaque; 383 384 return cpu->env.pmsav7.rnr[M_REG_NS] < cpu->pmsav7_dregion; 385 } 386 387 static const VMStateDescription vmstate_pmsav7 = { 388 .name = "cpu/pmsav7", 389 .version_id = 1, 390 .minimum_version_id = 1, 391 .needed = pmsav7_needed, 392 .fields = (VMStateField[]) { 393 VMSTATE_VARRAY_UINT32(env.pmsav7.drbar, ARMCPU, pmsav7_dregion, 0, 394 vmstate_info_uint32, uint32_t), 395 VMSTATE_VARRAY_UINT32(env.pmsav7.drsr, ARMCPU, pmsav7_dregion, 0, 396 vmstate_info_uint32, uint32_t), 397 VMSTATE_VARRAY_UINT32(env.pmsav7.dracr, ARMCPU, pmsav7_dregion, 0, 398 vmstate_info_uint32, uint32_t), 399 VMSTATE_VALIDATE("rgnr is valid", pmsav7_rgnr_vmstate_validate), 400 VMSTATE_END_OF_LIST() 401 } 402 }; 403 404 static bool pmsav7_rnr_needed(void *opaque) 405 { 406 ARMCPU *cpu = opaque; 407 CPUARMState *env = &cpu->env; 408 409 /* For R profile cores pmsav7.rnr is migrated via the cpreg 410 * "RGNR" definition in helper.h. For M profile we have to 411 * migrate it separately. 412 */ 413 return arm_feature(env, ARM_FEATURE_M); 414 } 415 416 static const VMStateDescription vmstate_pmsav7_rnr = { 417 .name = "cpu/pmsav7-rnr", 418 .version_id = 1, 419 .minimum_version_id = 1, 420 .needed = pmsav7_rnr_needed, 421 .fields = (VMStateField[]) { 422 VMSTATE_UINT32(env.pmsav7.rnr[M_REG_NS], ARMCPU), 423 VMSTATE_END_OF_LIST() 424 } 425 }; 426 427 static bool pmsav8_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_V8); 434 } 435 436 static const VMStateDescription vmstate_pmsav8 = { 437 .name = "cpu/pmsav8", 438 .version_id = 1, 439 .minimum_version_id = 1, 440 .needed = pmsav8_needed, 441 .fields = (VMStateField[]) { 442 VMSTATE_VARRAY_UINT32(env.pmsav8.rbar[M_REG_NS], ARMCPU, pmsav7_dregion, 443 0, vmstate_info_uint32, uint32_t), 444 VMSTATE_VARRAY_UINT32(env.pmsav8.rlar[M_REG_NS], ARMCPU, pmsav7_dregion, 445 0, vmstate_info_uint32, uint32_t), 446 VMSTATE_UINT32(env.pmsav8.mair0[M_REG_NS], ARMCPU), 447 VMSTATE_UINT32(env.pmsav8.mair1[M_REG_NS], ARMCPU), 448 VMSTATE_END_OF_LIST() 449 } 450 }; 451 452 static bool s_rnr_vmstate_validate(void *opaque, int version_id) 453 { 454 ARMCPU *cpu = opaque; 455 456 return cpu->env.pmsav7.rnr[M_REG_S] < cpu->pmsav7_dregion; 457 } 458 459 static bool sau_rnr_vmstate_validate(void *opaque, int version_id) 460 { 461 ARMCPU *cpu = opaque; 462 463 return cpu->env.sau.rnr < cpu->sau_sregion; 464 } 465 466 static bool m_security_needed(void *opaque) 467 { 468 ARMCPU *cpu = opaque; 469 CPUARMState *env = &cpu->env; 470 471 return arm_feature(env, ARM_FEATURE_M_SECURITY); 472 } 473 474 static const VMStateDescription vmstate_m_security = { 475 .name = "cpu/m-security", 476 .version_id = 1, 477 .minimum_version_id = 1, 478 .needed = m_security_needed, 479 .fields = (VMStateField[]) { 480 VMSTATE_UINT32(env.v7m.secure, ARMCPU), 481 VMSTATE_UINT32(env.v7m.other_ss_msp, ARMCPU), 482 VMSTATE_UINT32(env.v7m.other_ss_psp, ARMCPU), 483 VMSTATE_UINT32(env.v7m.basepri[M_REG_S], ARMCPU), 484 VMSTATE_UINT32(env.v7m.primask[M_REG_S], ARMCPU), 485 VMSTATE_UINT32(env.v7m.faultmask[M_REG_S], ARMCPU), 486 VMSTATE_UINT32(env.v7m.control[M_REG_S], ARMCPU), 487 VMSTATE_UINT32(env.v7m.vecbase[M_REG_S], ARMCPU), 488 VMSTATE_UINT32(env.pmsav8.mair0[M_REG_S], ARMCPU), 489 VMSTATE_UINT32(env.pmsav8.mair1[M_REG_S], ARMCPU), 490 VMSTATE_VARRAY_UINT32(env.pmsav8.rbar[M_REG_S], ARMCPU, pmsav7_dregion, 491 0, vmstate_info_uint32, uint32_t), 492 VMSTATE_VARRAY_UINT32(env.pmsav8.rlar[M_REG_S], ARMCPU, pmsav7_dregion, 493 0, vmstate_info_uint32, uint32_t), 494 VMSTATE_UINT32(env.pmsav7.rnr[M_REG_S], ARMCPU), 495 VMSTATE_VALIDATE("secure MPU_RNR is valid", s_rnr_vmstate_validate), 496 VMSTATE_UINT32(env.v7m.mpu_ctrl[M_REG_S], ARMCPU), 497 VMSTATE_UINT32(env.v7m.ccr[M_REG_S], ARMCPU), 498 VMSTATE_UINT32(env.v7m.mmfar[M_REG_S], ARMCPU), 499 VMSTATE_UINT32(env.v7m.cfsr[M_REG_S], ARMCPU), 500 VMSTATE_UINT32(env.v7m.sfsr, ARMCPU), 501 VMSTATE_UINT32(env.v7m.sfar, ARMCPU), 502 VMSTATE_VARRAY_UINT32(env.sau.rbar, ARMCPU, sau_sregion, 0, 503 vmstate_info_uint32, uint32_t), 504 VMSTATE_VARRAY_UINT32(env.sau.rlar, ARMCPU, sau_sregion, 0, 505 vmstate_info_uint32, uint32_t), 506 VMSTATE_UINT32(env.sau.rnr, ARMCPU), 507 VMSTATE_VALIDATE("SAU_RNR is valid", sau_rnr_vmstate_validate), 508 VMSTATE_UINT32(env.sau.ctrl, ARMCPU), 509 VMSTATE_UINT32(env.v7m.scr[M_REG_S], ARMCPU), 510 /* AIRCR is not secure-only, but our implementation is R/O if the 511 * security extension is unimplemented, so we migrate it here. 512 */ 513 VMSTATE_UINT32(env.v7m.aircr, ARMCPU), 514 VMSTATE_END_OF_LIST() 515 } 516 }; 517 518 static int get_cpsr(QEMUFile *f, void *opaque, size_t size, 519 const VMStateField *field) 520 { 521 ARMCPU *cpu = opaque; 522 CPUARMState *env = &cpu->env; 523 uint32_t val = qemu_get_be32(f); 524 525 if (arm_feature(env, ARM_FEATURE_M)) { 526 if (val & XPSR_EXCP) { 527 /* This is a CPSR format value from an older QEMU. (We can tell 528 * because values transferred in XPSR format always have zero 529 * for the EXCP field, and CPSR format will always have bit 4 530 * set in CPSR_M.) Rearrange it into XPSR format. The significant 531 * differences are that the T bit is not in the same place, the 532 * primask/faultmask info may be in the CPSR I and F bits, and 533 * we do not want the mode bits. 534 * We know that this cleanup happened before v8M, so there 535 * is no complication with banked primask/faultmask. 536 */ 537 uint32_t newval = val; 538 539 assert(!arm_feature(env, ARM_FEATURE_M_SECURITY)); 540 541 newval &= (CPSR_NZCV | CPSR_Q | CPSR_IT | CPSR_GE); 542 if (val & CPSR_T) { 543 newval |= XPSR_T; 544 } 545 /* If the I or F bits are set then this is a migration from 546 * an old QEMU which still stored the M profile FAULTMASK 547 * and PRIMASK in env->daif. For a new QEMU, the data is 548 * transferred using the vmstate_m_faultmask_primask subsection. 549 */ 550 if (val & CPSR_F) { 551 env->v7m.faultmask[M_REG_NS] = 1; 552 } 553 if (val & CPSR_I) { 554 env->v7m.primask[M_REG_NS] = 1; 555 } 556 val = newval; 557 } 558 /* Ignore the low bits, they are handled by vmstate_m. */ 559 xpsr_write(env, val, ~XPSR_EXCP); 560 return 0; 561 } 562 563 env->aarch64 = ((val & PSTATE_nRW) == 0); 564 565 if (is_a64(env)) { 566 pstate_write(env, val); 567 return 0; 568 } 569 570 cpsr_write(env, val, 0xffffffff, CPSRWriteRaw); 571 return 0; 572 } 573 574 static int put_cpsr(QEMUFile *f, void *opaque, size_t size, 575 const VMStateField *field, QJSON *vmdesc) 576 { 577 ARMCPU *cpu = opaque; 578 CPUARMState *env = &cpu->env; 579 uint32_t val; 580 581 if (arm_feature(env, ARM_FEATURE_M)) { 582 /* The low 9 bits are v7m.exception, which is handled by vmstate_m. */ 583 val = xpsr_read(env) & ~XPSR_EXCP; 584 } else if (is_a64(env)) { 585 val = pstate_read(env); 586 } else { 587 val = cpsr_read(env); 588 } 589 590 qemu_put_be32(f, val); 591 return 0; 592 } 593 594 static const VMStateInfo vmstate_cpsr = { 595 .name = "cpsr", 596 .get = get_cpsr, 597 .put = put_cpsr, 598 }; 599 600 static int get_power(QEMUFile *f, void *opaque, size_t size, 601 const VMStateField *field) 602 { 603 ARMCPU *cpu = opaque; 604 bool powered_off = qemu_get_byte(f); 605 cpu->power_state = powered_off ? PSCI_OFF : PSCI_ON; 606 return 0; 607 } 608 609 static int put_power(QEMUFile *f, void *opaque, size_t size, 610 const VMStateField *field, QJSON *vmdesc) 611 { 612 ARMCPU *cpu = opaque; 613 614 /* Migration should never happen while we transition power states */ 615 616 if (cpu->power_state == PSCI_ON || 617 cpu->power_state == PSCI_OFF) { 618 bool powered_off = (cpu->power_state == PSCI_OFF) ? true : false; 619 qemu_put_byte(f, powered_off); 620 return 0; 621 } else { 622 return 1; 623 } 624 } 625 626 static const VMStateInfo vmstate_powered_off = { 627 .name = "powered_off", 628 .get = get_power, 629 .put = put_power, 630 }; 631 632 static int cpu_pre_save(void *opaque) 633 { 634 ARMCPU *cpu = opaque; 635 636 if (!kvm_enabled()) { 637 pmu_op_start(&cpu->env); 638 } 639 640 if (kvm_enabled()) { 641 if (!write_kvmstate_to_list(cpu)) { 642 /* This should never fail */ 643 abort(); 644 } 645 646 /* 647 * kvm_arm_cpu_pre_save() must be called after 648 * write_kvmstate_to_list() 649 */ 650 kvm_arm_cpu_pre_save(cpu); 651 } else { 652 if (!write_cpustate_to_list(cpu, false)) { 653 /* This should never fail. */ 654 abort(); 655 } 656 } 657 658 cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len; 659 memcpy(cpu->cpreg_vmstate_indexes, cpu->cpreg_indexes, 660 cpu->cpreg_array_len * sizeof(uint64_t)); 661 memcpy(cpu->cpreg_vmstate_values, cpu->cpreg_values, 662 cpu->cpreg_array_len * sizeof(uint64_t)); 663 664 return 0; 665 } 666 667 static int cpu_post_save(void *opaque) 668 { 669 ARMCPU *cpu = opaque; 670 671 if (!kvm_enabled()) { 672 pmu_op_finish(&cpu->env); 673 } 674 675 return 0; 676 } 677 678 static int cpu_pre_load(void *opaque) 679 { 680 ARMCPU *cpu = opaque; 681 CPUARMState *env = &cpu->env; 682 683 /* 684 * Pre-initialize irq_line_state to a value that's never valid as 685 * real data, so cpu_post_load() can tell whether we've seen the 686 * irq-line-state subsection in the incoming migration state. 687 */ 688 env->irq_line_state = UINT32_MAX; 689 690 if (!kvm_enabled()) { 691 pmu_op_start(&cpu->env); 692 } 693 694 return 0; 695 } 696 697 static int cpu_post_load(void *opaque, int version_id) 698 { 699 ARMCPU *cpu = opaque; 700 CPUARMState *env = &cpu->env; 701 int i, v; 702 703 /* 704 * Handle migration compatibility from old QEMU which didn't 705 * send the irq-line-state subsection. A QEMU without it did not 706 * implement the HCR_EL2.{VI,VF} bits as generating interrupts, 707 * so for TCG the line state matches the bits set in cs->interrupt_request. 708 * For KVM the line state is not stored in cs->interrupt_request 709 * and so this will leave irq_line_state as 0, but this is OK because 710 * we only need to care about it for TCG. 711 */ 712 if (env->irq_line_state == UINT32_MAX) { 713 CPUState *cs = CPU(cpu); 714 715 env->irq_line_state = cs->interrupt_request & 716 (CPU_INTERRUPT_HARD | CPU_INTERRUPT_FIQ | 717 CPU_INTERRUPT_VIRQ | CPU_INTERRUPT_VFIQ); 718 } 719 720 /* Update the values list from the incoming migration data. 721 * Anything in the incoming data which we don't know about is 722 * a migration failure; anything we know about but the incoming 723 * data doesn't specify retains its current (reset) value. 724 * The indexes list remains untouched -- we only inspect the 725 * incoming migration index list so we can match the values array 726 * entries with the right slots in our own values array. 727 */ 728 729 for (i = 0, v = 0; i < cpu->cpreg_array_len 730 && v < cpu->cpreg_vmstate_array_len; i++) { 731 if (cpu->cpreg_vmstate_indexes[v] > cpu->cpreg_indexes[i]) { 732 /* register in our list but not incoming : skip it */ 733 continue; 734 } 735 if (cpu->cpreg_vmstate_indexes[v] < cpu->cpreg_indexes[i]) { 736 /* register in their list but not ours: fail migration */ 737 return -1; 738 } 739 /* matching register, copy the value over */ 740 cpu->cpreg_values[i] = cpu->cpreg_vmstate_values[v]; 741 v++; 742 } 743 744 if (kvm_enabled()) { 745 if (!write_list_to_kvmstate(cpu, KVM_PUT_FULL_STATE)) { 746 return -1; 747 } 748 /* Note that it's OK for the TCG side not to know about 749 * every register in the list; KVM is authoritative if 750 * we're using it. 751 */ 752 write_list_to_cpustate(cpu); 753 kvm_arm_cpu_post_load(cpu); 754 } else { 755 if (!write_list_to_cpustate(cpu)) { 756 return -1; 757 } 758 } 759 760 hw_breakpoint_update_all(cpu); 761 hw_watchpoint_update_all(cpu); 762 763 if (!kvm_enabled()) { 764 pmu_op_finish(&cpu->env); 765 } 766 arm_rebuild_hflags(&cpu->env); 767 768 return 0; 769 } 770 771 const VMStateDescription vmstate_arm_cpu = { 772 .name = "cpu", 773 .version_id = 22, 774 .minimum_version_id = 22, 775 .pre_save = cpu_pre_save, 776 .post_save = cpu_post_save, 777 .pre_load = cpu_pre_load, 778 .post_load = cpu_post_load, 779 .fields = (VMStateField[]) { 780 VMSTATE_UINT32_ARRAY(env.regs, ARMCPU, 16), 781 VMSTATE_UINT64_ARRAY(env.xregs, ARMCPU, 32), 782 VMSTATE_UINT64(env.pc, ARMCPU), 783 { 784 .name = "cpsr", 785 .version_id = 0, 786 .size = sizeof(uint32_t), 787 .info = &vmstate_cpsr, 788 .flags = VMS_SINGLE, 789 .offset = 0, 790 }, 791 VMSTATE_UINT32(env.spsr, ARMCPU), 792 VMSTATE_UINT64_ARRAY(env.banked_spsr, ARMCPU, 8), 793 VMSTATE_UINT32_ARRAY(env.banked_r13, ARMCPU, 8), 794 VMSTATE_UINT32_ARRAY(env.banked_r14, ARMCPU, 8), 795 VMSTATE_UINT32_ARRAY(env.usr_regs, ARMCPU, 5), 796 VMSTATE_UINT32_ARRAY(env.fiq_regs, ARMCPU, 5), 797 VMSTATE_UINT64_ARRAY(env.elr_el, ARMCPU, 4), 798 VMSTATE_UINT64_ARRAY(env.sp_el, ARMCPU, 4), 799 /* The length-check must come before the arrays to avoid 800 * incoming data possibly overflowing the array. 801 */ 802 VMSTATE_INT32_POSITIVE_LE(cpreg_vmstate_array_len, ARMCPU), 803 VMSTATE_VARRAY_INT32(cpreg_vmstate_indexes, ARMCPU, 804 cpreg_vmstate_array_len, 805 0, vmstate_info_uint64, uint64_t), 806 VMSTATE_VARRAY_INT32(cpreg_vmstate_values, ARMCPU, 807 cpreg_vmstate_array_len, 808 0, vmstate_info_uint64, uint64_t), 809 VMSTATE_UINT64(env.exclusive_addr, ARMCPU), 810 VMSTATE_UINT64(env.exclusive_val, ARMCPU), 811 VMSTATE_UINT64(env.exclusive_high, ARMCPU), 812 VMSTATE_UINT64(env.features, ARMCPU), 813 VMSTATE_UINT32(env.exception.syndrome, ARMCPU), 814 VMSTATE_UINT32(env.exception.fsr, ARMCPU), 815 VMSTATE_UINT64(env.exception.vaddress, ARMCPU), 816 VMSTATE_TIMER_PTR(gt_timer[GTIMER_PHYS], ARMCPU), 817 VMSTATE_TIMER_PTR(gt_timer[GTIMER_VIRT], ARMCPU), 818 { 819 .name = "power_state", 820 .version_id = 0, 821 .size = sizeof(bool), 822 .info = &vmstate_powered_off, 823 .flags = VMS_SINGLE, 824 .offset = 0, 825 }, 826 VMSTATE_END_OF_LIST() 827 }, 828 .subsections = (const VMStateDescription*[]) { 829 &vmstate_vfp, 830 &vmstate_iwmmxt, 831 &vmstate_m, 832 &vmstate_thumb2ee, 833 /* pmsav7_rnr must come before pmsav7 so that we have the 834 * region number before we test it in the VMSTATE_VALIDATE 835 * in vmstate_pmsav7. 836 */ 837 &vmstate_pmsav7_rnr, 838 &vmstate_pmsav7, 839 &vmstate_pmsav8, 840 &vmstate_m_security, 841 #ifdef TARGET_AARCH64 842 &vmstate_sve, 843 #endif 844 &vmstate_serror, 845 &vmstate_irq_line_state, 846 NULL 847 } 848 }; 849