1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Contains CPU specific errata definitions 4 * 5 * Copyright (C) 2014 ARM Ltd. 6 */ 7 8 #include <linux/arm-smccc.h> 9 #include <linux/types.h> 10 #include <linux/cpu.h> 11 #include <asm/cpu.h> 12 #include <asm/cputype.h> 13 #include <asm/cpufeature.h> 14 #include <asm/kvm_asm.h> 15 #include <asm/smp_plat.h> 16 17 static bool __maybe_unused 18 is_affected_midr_range(const struct arm64_cpu_capabilities *entry, int scope) 19 { 20 const struct arm64_midr_revidr *fix; 21 u32 midr = read_cpuid_id(), revidr; 22 23 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible()); 24 if (!is_midr_in_range(midr, &entry->midr_range)) 25 return false; 26 27 midr &= MIDR_REVISION_MASK | MIDR_VARIANT_MASK; 28 revidr = read_cpuid(REVIDR_EL1); 29 for (fix = entry->fixed_revs; fix && fix->revidr_mask; fix++) 30 if (midr == fix->midr_rv && (revidr & fix->revidr_mask)) 31 return false; 32 33 return true; 34 } 35 36 static bool __maybe_unused 37 is_affected_midr_range_list(const struct arm64_cpu_capabilities *entry, 38 int scope) 39 { 40 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible()); 41 return is_midr_in_range_list(read_cpuid_id(), entry->midr_range_list); 42 } 43 44 static bool __maybe_unused 45 is_kryo_midr(const struct arm64_cpu_capabilities *entry, int scope) 46 { 47 u32 model; 48 49 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible()); 50 51 model = read_cpuid_id(); 52 model &= MIDR_IMPLEMENTOR_MASK | (0xf00 << MIDR_PARTNUM_SHIFT) | 53 MIDR_ARCHITECTURE_MASK; 54 55 return model == entry->midr_range.model; 56 } 57 58 static bool 59 has_mismatched_cache_type(const struct arm64_cpu_capabilities *entry, 60 int scope) 61 { 62 u64 mask = arm64_ftr_reg_ctrel0.strict_mask; 63 u64 sys = arm64_ftr_reg_ctrel0.sys_val & mask; 64 u64 ctr_raw, ctr_real; 65 66 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible()); 67 68 /* 69 * We want to make sure that all the CPUs in the system expose 70 * a consistent CTR_EL0 to make sure that applications behaves 71 * correctly with migration. 72 * 73 * If a CPU has CTR_EL0.IDC but does not advertise it via CTR_EL0 : 74 * 75 * 1) It is safe if the system doesn't support IDC, as CPU anyway 76 * reports IDC = 0, consistent with the rest. 77 * 78 * 2) If the system has IDC, it is still safe as we trap CTR_EL0 79 * access on this CPU via the ARM64_HAS_CACHE_IDC capability. 80 * 81 * So, we need to make sure either the raw CTR_EL0 or the effective 82 * CTR_EL0 matches the system's copy to allow a secondary CPU to boot. 83 */ 84 ctr_raw = read_cpuid_cachetype() & mask; 85 ctr_real = read_cpuid_effective_cachetype() & mask; 86 87 return (ctr_real != sys) && (ctr_raw != sys); 88 } 89 90 static void 91 cpu_enable_trap_ctr_access(const struct arm64_cpu_capabilities *cap) 92 { 93 u64 mask = arm64_ftr_reg_ctrel0.strict_mask; 94 bool enable_uct_trap = false; 95 96 /* Trap CTR_EL0 access on this CPU, only if it has a mismatch */ 97 if ((read_cpuid_cachetype() & mask) != 98 (arm64_ftr_reg_ctrel0.sys_val & mask)) 99 enable_uct_trap = true; 100 101 /* ... or if the system is affected by an erratum */ 102 if (cap->capability == ARM64_WORKAROUND_1542419) 103 enable_uct_trap = true; 104 105 if (enable_uct_trap) 106 sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCT, 0); 107 } 108 109 atomic_t arm64_el2_vector_last_slot = ATOMIC_INIT(-1); 110 111 #include <asm/mmu_context.h> 112 #include <asm/cacheflush.h> 113 114 DEFINE_PER_CPU_READ_MOSTLY(struct bp_hardening_data, bp_hardening_data); 115 116 #ifdef CONFIG_KVM_INDIRECT_VECTORS 117 static void __copy_hyp_vect_bpi(int slot, const char *hyp_vecs_start, 118 const char *hyp_vecs_end) 119 { 120 void *dst = lm_alias(__bp_harden_hyp_vecs + slot * SZ_2K); 121 int i; 122 123 for (i = 0; i < SZ_2K; i += 0x80) 124 memcpy(dst + i, hyp_vecs_start, hyp_vecs_end - hyp_vecs_start); 125 126 __flush_icache_range((uintptr_t)dst, (uintptr_t)dst + SZ_2K); 127 } 128 129 static void install_bp_hardening_cb(bp_hardening_cb_t fn, 130 const char *hyp_vecs_start, 131 const char *hyp_vecs_end) 132 { 133 static DEFINE_RAW_SPINLOCK(bp_lock); 134 int cpu, slot = -1; 135 136 /* 137 * detect_harden_bp_fw() passes NULL for the hyp_vecs start/end if 138 * we're a guest. Skip the hyp-vectors work. 139 */ 140 if (!hyp_vecs_start) { 141 __this_cpu_write(bp_hardening_data.fn, fn); 142 return; 143 } 144 145 raw_spin_lock(&bp_lock); 146 for_each_possible_cpu(cpu) { 147 if (per_cpu(bp_hardening_data.fn, cpu) == fn) { 148 slot = per_cpu(bp_hardening_data.hyp_vectors_slot, cpu); 149 break; 150 } 151 } 152 153 if (slot == -1) { 154 slot = atomic_inc_return(&arm64_el2_vector_last_slot); 155 BUG_ON(slot >= BP_HARDEN_EL2_SLOTS); 156 __copy_hyp_vect_bpi(slot, hyp_vecs_start, hyp_vecs_end); 157 } 158 159 __this_cpu_write(bp_hardening_data.hyp_vectors_slot, slot); 160 __this_cpu_write(bp_hardening_data.fn, fn); 161 raw_spin_unlock(&bp_lock); 162 } 163 #else 164 static void install_bp_hardening_cb(bp_hardening_cb_t fn, 165 const char *hyp_vecs_start, 166 const char *hyp_vecs_end) 167 { 168 __this_cpu_write(bp_hardening_data.fn, fn); 169 } 170 #endif /* CONFIG_KVM_INDIRECT_VECTORS */ 171 172 #include <linux/arm-smccc.h> 173 174 static void __maybe_unused call_smc_arch_workaround_1(void) 175 { 176 arm_smccc_1_1_smc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL); 177 } 178 179 static void call_hvc_arch_workaround_1(void) 180 { 181 arm_smccc_1_1_hvc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL); 182 } 183 184 static void qcom_link_stack_sanitization(void) 185 { 186 u64 tmp; 187 188 asm volatile("mov %0, x30 \n" 189 ".rept 16 \n" 190 "bl . + 4 \n" 191 ".endr \n" 192 "mov x30, %0 \n" 193 : "=&r" (tmp)); 194 } 195 196 static bool __nospectre_v2; 197 static int __init parse_nospectre_v2(char *str) 198 { 199 __nospectre_v2 = true; 200 return 0; 201 } 202 early_param("nospectre_v2", parse_nospectre_v2); 203 204 /* 205 * -1: No workaround 206 * 0: No workaround required 207 * 1: Workaround installed 208 */ 209 static int detect_harden_bp_fw(void) 210 { 211 bp_hardening_cb_t cb; 212 void *smccc_start, *smccc_end; 213 struct arm_smccc_res res; 214 u32 midr = read_cpuid_id(); 215 216 arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID, 217 ARM_SMCCC_ARCH_WORKAROUND_1, &res); 218 219 switch ((int)res.a0) { 220 case 1: 221 /* Firmware says we're just fine */ 222 return 0; 223 case 0: 224 break; 225 default: 226 return -1; 227 } 228 229 switch (arm_smccc_1_1_get_conduit()) { 230 case SMCCC_CONDUIT_HVC: 231 cb = call_hvc_arch_workaround_1; 232 /* This is a guest, no need to patch KVM vectors */ 233 smccc_start = NULL; 234 smccc_end = NULL; 235 break; 236 237 #if IS_ENABLED(CONFIG_KVM) 238 case SMCCC_CONDUIT_SMC: 239 cb = call_smc_arch_workaround_1; 240 smccc_start = __smccc_workaround_1_smc; 241 smccc_end = __smccc_workaround_1_smc + 242 __SMCCC_WORKAROUND_1_SMC_SZ; 243 break; 244 #endif 245 246 default: 247 return -1; 248 } 249 250 if (((midr & MIDR_CPU_MODEL_MASK) == MIDR_QCOM_FALKOR) || 251 ((midr & MIDR_CPU_MODEL_MASK) == MIDR_QCOM_FALKOR_V1)) 252 cb = qcom_link_stack_sanitization; 253 254 if (IS_ENABLED(CONFIG_HARDEN_BRANCH_PREDICTOR)) 255 install_bp_hardening_cb(cb, smccc_start, smccc_end); 256 257 return 1; 258 } 259 260 DEFINE_PER_CPU_READ_MOSTLY(u64, arm64_ssbd_callback_required); 261 262 int ssbd_state __read_mostly = ARM64_SSBD_KERNEL; 263 static bool __ssb_safe = true; 264 265 static const struct ssbd_options { 266 const char *str; 267 int state; 268 } ssbd_options[] = { 269 { "force-on", ARM64_SSBD_FORCE_ENABLE, }, 270 { "force-off", ARM64_SSBD_FORCE_DISABLE, }, 271 { "kernel", ARM64_SSBD_KERNEL, }, 272 }; 273 274 static int __init ssbd_cfg(char *buf) 275 { 276 int i; 277 278 if (!buf || !buf[0]) 279 return -EINVAL; 280 281 for (i = 0; i < ARRAY_SIZE(ssbd_options); i++) { 282 int len = strlen(ssbd_options[i].str); 283 284 if (strncmp(buf, ssbd_options[i].str, len)) 285 continue; 286 287 ssbd_state = ssbd_options[i].state; 288 return 0; 289 } 290 291 return -EINVAL; 292 } 293 early_param("ssbd", ssbd_cfg); 294 295 void __init arm64_update_smccc_conduit(struct alt_instr *alt, 296 __le32 *origptr, __le32 *updptr, 297 int nr_inst) 298 { 299 u32 insn; 300 301 BUG_ON(nr_inst != 1); 302 303 switch (arm_smccc_1_1_get_conduit()) { 304 case SMCCC_CONDUIT_HVC: 305 insn = aarch64_insn_get_hvc_value(); 306 break; 307 case SMCCC_CONDUIT_SMC: 308 insn = aarch64_insn_get_smc_value(); 309 break; 310 default: 311 return; 312 } 313 314 *updptr = cpu_to_le32(insn); 315 } 316 317 void __init arm64_enable_wa2_handling(struct alt_instr *alt, 318 __le32 *origptr, __le32 *updptr, 319 int nr_inst) 320 { 321 BUG_ON(nr_inst != 1); 322 /* 323 * Only allow mitigation on EL1 entry/exit and guest 324 * ARCH_WORKAROUND_2 handling if the SSBD state allows it to 325 * be flipped. 326 */ 327 if (arm64_get_ssbd_state() == ARM64_SSBD_KERNEL) 328 *updptr = cpu_to_le32(aarch64_insn_gen_nop()); 329 } 330 331 void arm64_set_ssbd_mitigation(bool state) 332 { 333 int conduit; 334 335 if (!IS_ENABLED(CONFIG_ARM64_SSBD)) { 336 pr_info_once("SSBD disabled by kernel configuration\n"); 337 return; 338 } 339 340 if (this_cpu_has_cap(ARM64_SSBS)) { 341 if (state) 342 asm volatile(SET_PSTATE_SSBS(0)); 343 else 344 asm volatile(SET_PSTATE_SSBS(1)); 345 return; 346 } 347 348 conduit = arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_WORKAROUND_2, state, 349 NULL); 350 351 WARN_ON_ONCE(conduit == SMCCC_CONDUIT_NONE); 352 } 353 354 static bool has_ssbd_mitigation(const struct arm64_cpu_capabilities *entry, 355 int scope) 356 { 357 struct arm_smccc_res res; 358 bool required = true; 359 s32 val; 360 bool this_cpu_safe = false; 361 int conduit; 362 363 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible()); 364 365 if (cpu_mitigations_off()) 366 ssbd_state = ARM64_SSBD_FORCE_DISABLE; 367 368 /* delay setting __ssb_safe until we get a firmware response */ 369 if (is_midr_in_range_list(read_cpuid_id(), entry->midr_range_list)) 370 this_cpu_safe = true; 371 372 if (this_cpu_has_cap(ARM64_SSBS)) { 373 if (!this_cpu_safe) 374 __ssb_safe = false; 375 required = false; 376 goto out_printmsg; 377 } 378 379 conduit = arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID, 380 ARM_SMCCC_ARCH_WORKAROUND_2, &res); 381 382 if (conduit == SMCCC_CONDUIT_NONE) { 383 ssbd_state = ARM64_SSBD_UNKNOWN; 384 if (!this_cpu_safe) 385 __ssb_safe = false; 386 return false; 387 } 388 389 val = (s32)res.a0; 390 391 switch (val) { 392 case SMCCC_RET_NOT_SUPPORTED: 393 ssbd_state = ARM64_SSBD_UNKNOWN; 394 if (!this_cpu_safe) 395 __ssb_safe = false; 396 return false; 397 398 /* machines with mixed mitigation requirements must not return this */ 399 case SMCCC_RET_NOT_REQUIRED: 400 pr_info_once("%s mitigation not required\n", entry->desc); 401 ssbd_state = ARM64_SSBD_MITIGATED; 402 return false; 403 404 case SMCCC_RET_SUCCESS: 405 __ssb_safe = false; 406 required = true; 407 break; 408 409 case 1: /* Mitigation not required on this CPU */ 410 required = false; 411 break; 412 413 default: 414 WARN_ON(1); 415 if (!this_cpu_safe) 416 __ssb_safe = false; 417 return false; 418 } 419 420 switch (ssbd_state) { 421 case ARM64_SSBD_FORCE_DISABLE: 422 arm64_set_ssbd_mitigation(false); 423 required = false; 424 break; 425 426 case ARM64_SSBD_KERNEL: 427 if (required) { 428 __this_cpu_write(arm64_ssbd_callback_required, 1); 429 arm64_set_ssbd_mitigation(true); 430 } 431 break; 432 433 case ARM64_SSBD_FORCE_ENABLE: 434 arm64_set_ssbd_mitigation(true); 435 required = true; 436 break; 437 438 default: 439 WARN_ON(1); 440 break; 441 } 442 443 out_printmsg: 444 switch (ssbd_state) { 445 case ARM64_SSBD_FORCE_DISABLE: 446 pr_info_once("%s disabled from command-line\n", entry->desc); 447 break; 448 449 case ARM64_SSBD_FORCE_ENABLE: 450 pr_info_once("%s forced from command-line\n", entry->desc); 451 break; 452 } 453 454 return required; 455 } 456 457 /* known invulnerable cores */ 458 static const struct midr_range arm64_ssb_cpus[] = { 459 MIDR_ALL_VERSIONS(MIDR_CORTEX_A35), 460 MIDR_ALL_VERSIONS(MIDR_CORTEX_A53), 461 MIDR_ALL_VERSIONS(MIDR_CORTEX_A55), 462 MIDR_ALL_VERSIONS(MIDR_BRAHMA_B53), 463 {}, 464 }; 465 466 #ifdef CONFIG_ARM64_ERRATUM_1463225 467 DEFINE_PER_CPU(int, __in_cortex_a76_erratum_1463225_wa); 468 469 static bool 470 has_cortex_a76_erratum_1463225(const struct arm64_cpu_capabilities *entry, 471 int scope) 472 { 473 u32 midr = read_cpuid_id(); 474 /* Cortex-A76 r0p0 - r3p1 */ 475 struct midr_range range = MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 1); 476 477 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible()); 478 return is_midr_in_range(midr, &range) && is_kernel_in_hyp_mode(); 479 } 480 #endif 481 482 static void __maybe_unused 483 cpu_enable_cache_maint_trap(const struct arm64_cpu_capabilities *__unused) 484 { 485 sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCI, 0); 486 } 487 488 #define CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max) \ 489 .matches = is_affected_midr_range, \ 490 .midr_range = MIDR_RANGE(model, v_min, r_min, v_max, r_max) 491 492 #define CAP_MIDR_ALL_VERSIONS(model) \ 493 .matches = is_affected_midr_range, \ 494 .midr_range = MIDR_ALL_VERSIONS(model) 495 496 #define MIDR_FIXED(rev, revidr_mask) \ 497 .fixed_revs = (struct arm64_midr_revidr[]){{ (rev), (revidr_mask) }, {}} 498 499 #define ERRATA_MIDR_RANGE(model, v_min, r_min, v_max, r_max) \ 500 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, \ 501 CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max) 502 503 #define CAP_MIDR_RANGE_LIST(list) \ 504 .matches = is_affected_midr_range_list, \ 505 .midr_range_list = list 506 507 /* Errata affecting a range of revisions of given model variant */ 508 #define ERRATA_MIDR_REV_RANGE(m, var, r_min, r_max) \ 509 ERRATA_MIDR_RANGE(m, var, r_min, var, r_max) 510 511 /* Errata affecting a single variant/revision of a model */ 512 #define ERRATA_MIDR_REV(model, var, rev) \ 513 ERRATA_MIDR_RANGE(model, var, rev, var, rev) 514 515 /* Errata affecting all variants/revisions of a given a model */ 516 #define ERRATA_MIDR_ALL_VERSIONS(model) \ 517 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, \ 518 CAP_MIDR_ALL_VERSIONS(model) 519 520 /* Errata affecting a list of midr ranges, with same work around */ 521 #define ERRATA_MIDR_RANGE_LIST(midr_list) \ 522 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, \ 523 CAP_MIDR_RANGE_LIST(midr_list) 524 525 /* Track overall mitigation state. We are only mitigated if all cores are ok */ 526 static bool __hardenbp_enab = true; 527 static bool __spectrev2_safe = true; 528 529 int get_spectre_v2_workaround_state(void) 530 { 531 if (__spectrev2_safe) 532 return ARM64_BP_HARDEN_NOT_REQUIRED; 533 534 if (!__hardenbp_enab) 535 return ARM64_BP_HARDEN_UNKNOWN; 536 537 return ARM64_BP_HARDEN_WA_NEEDED; 538 } 539 540 /* 541 * List of CPUs that do not need any Spectre-v2 mitigation at all. 542 */ 543 static const struct midr_range spectre_v2_safe_list[] = { 544 MIDR_ALL_VERSIONS(MIDR_CORTEX_A35), 545 MIDR_ALL_VERSIONS(MIDR_CORTEX_A53), 546 MIDR_ALL_VERSIONS(MIDR_CORTEX_A55), 547 MIDR_ALL_VERSIONS(MIDR_BRAHMA_B53), 548 MIDR_ALL_VERSIONS(MIDR_HISI_TSV110), 549 MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_3XX_SILVER), 550 MIDR_ALL_VERSIONS(MIDR_QCOM_KRYO_4XX_SILVER), 551 { /* sentinel */ } 552 }; 553 554 /* 555 * Track overall bp hardening for all heterogeneous cores in the machine. 556 * We are only considered "safe" if all booted cores are known safe. 557 */ 558 static bool __maybe_unused 559 check_branch_predictor(const struct arm64_cpu_capabilities *entry, int scope) 560 { 561 int need_wa; 562 563 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible()); 564 565 /* If the CPU has CSV2 set, we're safe */ 566 if (cpuid_feature_extract_unsigned_field(read_cpuid(ID_AA64PFR0_EL1), 567 ID_AA64PFR0_CSV2_SHIFT)) 568 return false; 569 570 /* Alternatively, we have a list of unaffected CPUs */ 571 if (is_midr_in_range_list(read_cpuid_id(), spectre_v2_safe_list)) 572 return false; 573 574 /* Fallback to firmware detection */ 575 need_wa = detect_harden_bp_fw(); 576 if (!need_wa) 577 return false; 578 579 __spectrev2_safe = false; 580 581 if (!IS_ENABLED(CONFIG_HARDEN_BRANCH_PREDICTOR)) { 582 pr_warn_once("spectrev2 mitigation disabled by kernel configuration\n"); 583 __hardenbp_enab = false; 584 return false; 585 } 586 587 /* forced off */ 588 if (__nospectre_v2 || cpu_mitigations_off()) { 589 pr_info_once("spectrev2 mitigation disabled by command line option\n"); 590 __hardenbp_enab = false; 591 return false; 592 } 593 594 if (need_wa < 0) { 595 pr_warn_once("ARM_SMCCC_ARCH_WORKAROUND_1 missing from firmware\n"); 596 __hardenbp_enab = false; 597 } 598 599 return (need_wa > 0); 600 } 601 602 static const __maybe_unused struct midr_range tx2_family_cpus[] = { 603 MIDR_ALL_VERSIONS(MIDR_BRCM_VULCAN), 604 MIDR_ALL_VERSIONS(MIDR_CAVIUM_THUNDERX2), 605 {}, 606 }; 607 608 static bool __maybe_unused 609 needs_tx2_tvm_workaround(const struct arm64_cpu_capabilities *entry, 610 int scope) 611 { 612 int i; 613 614 if (!is_affected_midr_range_list(entry, scope) || 615 !is_hyp_mode_available()) 616 return false; 617 618 for_each_possible_cpu(i) { 619 if (MPIDR_AFFINITY_LEVEL(cpu_logical_map(i), 0) != 0) 620 return true; 621 } 622 623 return false; 624 } 625 626 static bool __maybe_unused 627 has_neoverse_n1_erratum_1542419(const struct arm64_cpu_capabilities *entry, 628 int scope) 629 { 630 u32 midr = read_cpuid_id(); 631 bool has_dic = read_cpuid_cachetype() & BIT(CTR_DIC_SHIFT); 632 const struct midr_range range = MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N1); 633 634 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible()); 635 return is_midr_in_range(midr, &range) && has_dic; 636 } 637 638 #if defined(CONFIG_HARDEN_EL2_VECTORS) 639 640 static const struct midr_range ca57_a72[] = { 641 MIDR_ALL_VERSIONS(MIDR_CORTEX_A57), 642 MIDR_ALL_VERSIONS(MIDR_CORTEX_A72), 643 {}, 644 }; 645 646 #endif 647 648 #ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI 649 static const struct arm64_cpu_capabilities arm64_repeat_tlbi_list[] = { 650 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1009 651 { 652 ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0) 653 }, 654 { 655 .midr_range.model = MIDR_QCOM_KRYO, 656 .matches = is_kryo_midr, 657 }, 658 #endif 659 #ifdef CONFIG_ARM64_ERRATUM_1286807 660 { 661 ERRATA_MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 0), 662 }, 663 #endif 664 {}, 665 }; 666 #endif 667 668 #ifdef CONFIG_CAVIUM_ERRATUM_27456 669 const struct midr_range cavium_erratum_27456_cpus[] = { 670 /* Cavium ThunderX, T88 pass 1.x - 2.1 */ 671 MIDR_RANGE(MIDR_THUNDERX, 0, 0, 1, 1), 672 /* Cavium ThunderX, T81 pass 1.0 */ 673 MIDR_REV(MIDR_THUNDERX_81XX, 0, 0), 674 {}, 675 }; 676 #endif 677 678 #ifdef CONFIG_CAVIUM_ERRATUM_30115 679 static const struct midr_range cavium_erratum_30115_cpus[] = { 680 /* Cavium ThunderX, T88 pass 1.x - 2.2 */ 681 MIDR_RANGE(MIDR_THUNDERX, 0, 0, 1, 2), 682 /* Cavium ThunderX, T81 pass 1.0 - 1.2 */ 683 MIDR_REV_RANGE(MIDR_THUNDERX_81XX, 0, 0, 2), 684 /* Cavium ThunderX, T83 pass 1.0 */ 685 MIDR_REV(MIDR_THUNDERX_83XX, 0, 0), 686 {}, 687 }; 688 #endif 689 690 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003 691 static const struct arm64_cpu_capabilities qcom_erratum_1003_list[] = { 692 { 693 ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0), 694 }, 695 { 696 .midr_range.model = MIDR_QCOM_KRYO, 697 .matches = is_kryo_midr, 698 }, 699 {}, 700 }; 701 #endif 702 703 #ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE 704 static const struct midr_range workaround_clean_cache[] = { 705 #if defined(CONFIG_ARM64_ERRATUM_826319) || \ 706 defined(CONFIG_ARM64_ERRATUM_827319) || \ 707 defined(CONFIG_ARM64_ERRATUM_824069) 708 /* Cortex-A53 r0p[012]: ARM errata 826319, 827319, 824069 */ 709 MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 2), 710 #endif 711 #ifdef CONFIG_ARM64_ERRATUM_819472 712 /* Cortex-A53 r0p[01] : ARM errata 819472 */ 713 MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 1), 714 #endif 715 {}, 716 }; 717 #endif 718 719 #ifdef CONFIG_ARM64_ERRATUM_1418040 720 /* 721 * - 1188873 affects r0p0 to r2p0 722 * - 1418040 affects r0p0 to r3p1 723 */ 724 static const struct midr_range erratum_1418040_list[] = { 725 /* Cortex-A76 r0p0 to r3p1 */ 726 MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 1), 727 /* Neoverse-N1 r0p0 to r3p1 */ 728 MIDR_RANGE(MIDR_NEOVERSE_N1, 0, 0, 3, 1), 729 {}, 730 }; 731 #endif 732 733 #ifdef CONFIG_ARM64_ERRATUM_845719 734 static const struct midr_range erratum_845719_list[] = { 735 /* Cortex-A53 r0p[01234] */ 736 MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4), 737 /* Brahma-B53 r0p[0] */ 738 MIDR_REV(MIDR_BRAHMA_B53, 0, 0), 739 {}, 740 }; 741 #endif 742 743 #ifdef CONFIG_ARM64_ERRATUM_843419 744 static const struct arm64_cpu_capabilities erratum_843419_list[] = { 745 { 746 /* Cortex-A53 r0p[01234] */ 747 .matches = is_affected_midr_range, 748 ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4), 749 MIDR_FIXED(0x4, BIT(8)), 750 }, 751 { 752 /* Brahma-B53 r0p[0] */ 753 .matches = is_affected_midr_range, 754 ERRATA_MIDR_REV(MIDR_BRAHMA_B53, 0, 0), 755 }, 756 {}, 757 }; 758 #endif 759 760 #ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT 761 static const struct midr_range erratum_speculative_at_list[] = { 762 #ifdef CONFIG_ARM64_ERRATUM_1165522 763 /* Cortex A76 r0p0 to r2p0 */ 764 MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 2, 0), 765 #endif 766 #ifdef CONFIG_ARM64_ERRATUM_1319367 767 MIDR_ALL_VERSIONS(MIDR_CORTEX_A57), 768 MIDR_ALL_VERSIONS(MIDR_CORTEX_A72), 769 #endif 770 #ifdef CONFIG_ARM64_ERRATUM_1530923 771 /* Cortex A55 r0p0 to r2p0 */ 772 MIDR_RANGE(MIDR_CORTEX_A55, 0, 0, 2, 0), 773 #endif 774 {}, 775 }; 776 #endif 777 778 const struct arm64_cpu_capabilities arm64_errata[] = { 779 #ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE 780 { 781 .desc = "ARM errata 826319, 827319, 824069, or 819472", 782 .capability = ARM64_WORKAROUND_CLEAN_CACHE, 783 ERRATA_MIDR_RANGE_LIST(workaround_clean_cache), 784 .cpu_enable = cpu_enable_cache_maint_trap, 785 }, 786 #endif 787 #ifdef CONFIG_ARM64_ERRATUM_832075 788 { 789 /* Cortex-A57 r0p0 - r1p2 */ 790 .desc = "ARM erratum 832075", 791 .capability = ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE, 792 ERRATA_MIDR_RANGE(MIDR_CORTEX_A57, 793 0, 0, 794 1, 2), 795 }, 796 #endif 797 #ifdef CONFIG_ARM64_ERRATUM_834220 798 { 799 /* Cortex-A57 r0p0 - r1p2 */ 800 .desc = "ARM erratum 834220", 801 .capability = ARM64_WORKAROUND_834220, 802 ERRATA_MIDR_RANGE(MIDR_CORTEX_A57, 803 0, 0, 804 1, 2), 805 }, 806 #endif 807 #ifdef CONFIG_ARM64_ERRATUM_843419 808 { 809 .desc = "ARM erratum 843419", 810 .capability = ARM64_WORKAROUND_843419, 811 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, 812 .matches = cpucap_multi_entry_cap_matches, 813 .match_list = erratum_843419_list, 814 }, 815 #endif 816 #ifdef CONFIG_ARM64_ERRATUM_845719 817 { 818 .desc = "ARM erratum 845719", 819 .capability = ARM64_WORKAROUND_845719, 820 ERRATA_MIDR_RANGE_LIST(erratum_845719_list), 821 }, 822 #endif 823 #ifdef CONFIG_CAVIUM_ERRATUM_23154 824 { 825 /* Cavium ThunderX, pass 1.x */ 826 .desc = "Cavium erratum 23154", 827 .capability = ARM64_WORKAROUND_CAVIUM_23154, 828 ERRATA_MIDR_REV_RANGE(MIDR_THUNDERX, 0, 0, 1), 829 }, 830 #endif 831 #ifdef CONFIG_CAVIUM_ERRATUM_27456 832 { 833 .desc = "Cavium erratum 27456", 834 .capability = ARM64_WORKAROUND_CAVIUM_27456, 835 ERRATA_MIDR_RANGE_LIST(cavium_erratum_27456_cpus), 836 }, 837 #endif 838 #ifdef CONFIG_CAVIUM_ERRATUM_30115 839 { 840 .desc = "Cavium erratum 30115", 841 .capability = ARM64_WORKAROUND_CAVIUM_30115, 842 ERRATA_MIDR_RANGE_LIST(cavium_erratum_30115_cpus), 843 }, 844 #endif 845 { 846 .desc = "Mismatched cache type (CTR_EL0)", 847 .capability = ARM64_MISMATCHED_CACHE_TYPE, 848 .matches = has_mismatched_cache_type, 849 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, 850 .cpu_enable = cpu_enable_trap_ctr_access, 851 }, 852 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003 853 { 854 .desc = "Qualcomm Technologies Falkor/Kryo erratum 1003", 855 .capability = ARM64_WORKAROUND_QCOM_FALKOR_E1003, 856 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, 857 .matches = cpucap_multi_entry_cap_matches, 858 .match_list = qcom_erratum_1003_list, 859 }, 860 #endif 861 #ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI 862 { 863 .desc = "Qualcomm erratum 1009, or ARM erratum 1286807", 864 .capability = ARM64_WORKAROUND_REPEAT_TLBI, 865 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, 866 .matches = cpucap_multi_entry_cap_matches, 867 .match_list = arm64_repeat_tlbi_list, 868 }, 869 #endif 870 #ifdef CONFIG_ARM64_ERRATUM_858921 871 { 872 /* Cortex-A73 all versions */ 873 .desc = "ARM erratum 858921", 874 .capability = ARM64_WORKAROUND_858921, 875 ERRATA_MIDR_ALL_VERSIONS(MIDR_CORTEX_A73), 876 }, 877 #endif 878 { 879 .capability = ARM64_HARDEN_BRANCH_PREDICTOR, 880 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, 881 .matches = check_branch_predictor, 882 }, 883 #ifdef CONFIG_HARDEN_EL2_VECTORS 884 { 885 .desc = "EL2 vector hardening", 886 .capability = ARM64_HARDEN_EL2_VECTORS, 887 ERRATA_MIDR_RANGE_LIST(ca57_a72), 888 }, 889 #endif 890 { 891 .desc = "Speculative Store Bypass Disable", 892 .capability = ARM64_SSBD, 893 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, 894 .matches = has_ssbd_mitigation, 895 .midr_range_list = arm64_ssb_cpus, 896 }, 897 #ifdef CONFIG_ARM64_ERRATUM_1418040 898 { 899 .desc = "ARM erratum 1418040", 900 .capability = ARM64_WORKAROUND_1418040, 901 ERRATA_MIDR_RANGE_LIST(erratum_1418040_list), 902 }, 903 #endif 904 #ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT 905 { 906 .desc = "ARM errata 1165522, 1319367, or 1530923", 907 .capability = ARM64_WORKAROUND_SPECULATIVE_AT, 908 ERRATA_MIDR_RANGE_LIST(erratum_speculative_at_list), 909 }, 910 #endif 911 #ifdef CONFIG_ARM64_ERRATUM_1463225 912 { 913 .desc = "ARM erratum 1463225", 914 .capability = ARM64_WORKAROUND_1463225, 915 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, 916 .matches = has_cortex_a76_erratum_1463225, 917 }, 918 #endif 919 #ifdef CONFIG_CAVIUM_TX2_ERRATUM_219 920 { 921 .desc = "Cavium ThunderX2 erratum 219 (KVM guest sysreg trapping)", 922 .capability = ARM64_WORKAROUND_CAVIUM_TX2_219_TVM, 923 ERRATA_MIDR_RANGE_LIST(tx2_family_cpus), 924 .matches = needs_tx2_tvm_workaround, 925 }, 926 { 927 .desc = "Cavium ThunderX2 erratum 219 (PRFM removal)", 928 .capability = ARM64_WORKAROUND_CAVIUM_TX2_219_PRFM, 929 ERRATA_MIDR_RANGE_LIST(tx2_family_cpus), 930 }, 931 #endif 932 #ifdef CONFIG_ARM64_ERRATUM_1542419 933 { 934 /* we depend on the firmware portion for correctness */ 935 .desc = "ARM erratum 1542419 (kernel portion)", 936 .capability = ARM64_WORKAROUND_1542419, 937 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, 938 .matches = has_neoverse_n1_erratum_1542419, 939 .cpu_enable = cpu_enable_trap_ctr_access, 940 }, 941 #endif 942 { 943 } 944 }; 945 946 ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, 947 char *buf) 948 { 949 return sprintf(buf, "Mitigation: __user pointer sanitization\n"); 950 } 951 952 ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr, 953 char *buf) 954 { 955 switch (get_spectre_v2_workaround_state()) { 956 case ARM64_BP_HARDEN_NOT_REQUIRED: 957 return sprintf(buf, "Not affected\n"); 958 case ARM64_BP_HARDEN_WA_NEEDED: 959 return sprintf(buf, "Mitigation: Branch predictor hardening\n"); 960 case ARM64_BP_HARDEN_UNKNOWN: 961 default: 962 return sprintf(buf, "Vulnerable\n"); 963 } 964 } 965 966 ssize_t cpu_show_spec_store_bypass(struct device *dev, 967 struct device_attribute *attr, char *buf) 968 { 969 if (__ssb_safe) 970 return sprintf(buf, "Not affected\n"); 971 972 switch (ssbd_state) { 973 case ARM64_SSBD_KERNEL: 974 case ARM64_SSBD_FORCE_ENABLE: 975 if (IS_ENABLED(CONFIG_ARM64_SSBD)) 976 return sprintf(buf, 977 "Mitigation: Speculative Store Bypass disabled via prctl\n"); 978 } 979 980 return sprintf(buf, "Vulnerable\n"); 981 } 982