1 // SPDX-License-Identifier: GPL-2.0-only
3 * Contains CPU specific errata definitions
5 * Copyright (C) 2014 ARM Ltd.
8 #include <linux/arm-smccc.h>
9 #include <linux/types.h>
10 #include <linux/cpu.h>
12 #include <asm/cputype.h>
13 #include <asm/cpufeature.h>
14 #include <asm/kvm_asm.h>
15 #include <asm/smp_plat.h>
17 static bool __maybe_unused
18 is_affected_midr_range(const struct arm64_cpu_capabilities *entry, int scope)
20 const struct arm64_midr_revidr *fix;
21 u32 midr = read_cpuid_id(), revidr;
23 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
24 if (!is_midr_in_range(midr, &entry->midr_range))
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))
36 static bool __maybe_unused
37 is_affected_midr_range_list(const struct arm64_cpu_capabilities *entry,
40 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
41 return is_midr_in_range_list(read_cpuid_id(), entry->midr_range_list);
44 static bool __maybe_unused
45 is_kryo_midr(const struct arm64_cpu_capabilities *entry, int scope)
49 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
51 model = read_cpuid_id();
52 model &= MIDR_IMPLEMENTOR_MASK | (0xf00 << MIDR_PARTNUM_SHIFT) |
53 MIDR_ARCHITECTURE_MASK;
55 return model == entry->midr_range.model;
59 has_mismatched_cache_type(const struct arm64_cpu_capabilities *entry,
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;
66 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
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.
73 * If a CPU has CTR_EL0.IDC but does not advertise it via CTR_EL0 :
75 * 1) It is safe if the system doesn't support IDC, as CPU anyway
76 * reports IDC = 0, consistent with the rest.
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.
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.
84 ctr_raw = read_cpuid_cachetype() & mask;
85 ctr_real = read_cpuid_effective_cachetype() & mask;
87 return (ctr_real != sys) && (ctr_raw != sys);
91 cpu_enable_trap_ctr_access(const struct arm64_cpu_capabilities *cap)
93 u64 mask = arm64_ftr_reg_ctrel0.strict_mask;
94 bool enable_uct_trap = false;
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;
101 /* ... or if the system is affected by an erratum */
102 if (cap->capability == ARM64_WORKAROUND_1542419)
103 enable_uct_trap = true;
106 sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCT, 0);
109 atomic_t arm64_el2_vector_last_slot = ATOMIC_INIT(-1);
111 #include <asm/mmu_context.h>
112 #include <asm/cacheflush.h>
114 DEFINE_PER_CPU_READ_MOSTLY(struct bp_hardening_data, bp_hardening_data);
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)
120 void *dst = lm_alias(__bp_harden_hyp_vecs + slot * SZ_2K);
123 for (i = 0; i < SZ_2K; i += 0x80)
124 memcpy(dst + i, hyp_vecs_start, hyp_vecs_end - hyp_vecs_start);
126 __flush_icache_range((uintptr_t)dst, (uintptr_t)dst + SZ_2K);
129 static void install_bp_hardening_cb(bp_hardening_cb_t fn,
130 const char *hyp_vecs_start,
131 const char *hyp_vecs_end)
133 static DEFINE_RAW_SPINLOCK(bp_lock);
137 * detect_harden_bp_fw() passes NULL for the hyp_vecs start/end if
138 * we're a guest. Skip the hyp-vectors work.
140 if (!hyp_vecs_start) {
141 __this_cpu_write(bp_hardening_data.fn, fn);
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);
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);
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);
164 static void install_bp_hardening_cb(bp_hardening_cb_t fn,
165 const char *hyp_vecs_start,
166 const char *hyp_vecs_end)
168 __this_cpu_write(bp_hardening_data.fn, fn);
170 #endif /* CONFIG_KVM_INDIRECT_VECTORS */
172 #include <linux/arm-smccc.h>
174 static void __maybe_unused call_smc_arch_workaround_1(void)
176 arm_smccc_1_1_smc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL);
179 static void call_hvc_arch_workaround_1(void)
181 arm_smccc_1_1_hvc(ARM_SMCCC_ARCH_WORKAROUND_1, NULL);
184 static void qcom_link_stack_sanitization(void)
188 asm volatile("mov %0, x30 \n"
196 static bool __nospectre_v2;
197 static int __init parse_nospectre_v2(char *str)
199 __nospectre_v2 = true;
202 early_param("nospectre_v2", parse_nospectre_v2);
206 * 0: No workaround required
207 * 1: Workaround installed
209 static int detect_harden_bp_fw(void)
211 bp_hardening_cb_t cb;
212 void *smccc_start, *smccc_end;
213 struct arm_smccc_res res;
214 u32 midr = read_cpuid_id();
216 arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
217 ARM_SMCCC_ARCH_WORKAROUND_1, &res);
219 switch ((int)res.a0) {
221 /* Firmware says we're just fine */
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 */
237 #if IS_ENABLED(CONFIG_KVM_ARM_HOST)
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;
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;
254 if (IS_ENABLED(CONFIG_HARDEN_BRANCH_PREDICTOR))
255 install_bp_hardening_cb(cb, smccc_start, smccc_end);
260 DEFINE_PER_CPU_READ_MOSTLY(u64, arm64_ssbd_callback_required);
262 int ssbd_state __read_mostly = ARM64_SSBD_KERNEL;
263 static bool __ssb_safe = true;
265 static const struct ssbd_options {
269 { "force-on", ARM64_SSBD_FORCE_ENABLE, },
270 { "force-off", ARM64_SSBD_FORCE_DISABLE, },
271 { "kernel", ARM64_SSBD_KERNEL, },
274 static int __init ssbd_cfg(char *buf)
281 for (i = 0; i < ARRAY_SIZE(ssbd_options); i++) {
282 int len = strlen(ssbd_options[i].str);
284 if (strncmp(buf, ssbd_options[i].str, len))
287 ssbd_state = ssbd_options[i].state;
293 early_param("ssbd", ssbd_cfg);
295 void __init arm64_update_smccc_conduit(struct alt_instr *alt,
296 __le32 *origptr, __le32 *updptr,
301 BUG_ON(nr_inst != 1);
303 switch (arm_smccc_1_1_get_conduit()) {
304 case SMCCC_CONDUIT_HVC:
305 insn = aarch64_insn_get_hvc_value();
307 case SMCCC_CONDUIT_SMC:
308 insn = aarch64_insn_get_smc_value();
314 *updptr = cpu_to_le32(insn);
317 void __init arm64_enable_wa2_handling(struct alt_instr *alt,
318 __le32 *origptr, __le32 *updptr,
321 BUG_ON(nr_inst != 1);
323 * Only allow mitigation on EL1 entry/exit and guest
324 * ARCH_WORKAROUND_2 handling if the SSBD state allows it to
327 if (arm64_get_ssbd_state() == ARM64_SSBD_KERNEL)
328 *updptr = cpu_to_le32(aarch64_insn_gen_nop());
331 void arm64_set_ssbd_mitigation(bool state)
335 if (!IS_ENABLED(CONFIG_ARM64_SSBD)) {
336 pr_info_once("SSBD disabled by kernel configuration\n");
340 if (this_cpu_has_cap(ARM64_SSBS)) {
342 asm volatile(SET_PSTATE_SSBS(0));
344 asm volatile(SET_PSTATE_SSBS(1));
348 conduit = arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_WORKAROUND_2, state,
351 WARN_ON_ONCE(conduit == SMCCC_CONDUIT_NONE);
354 static bool has_ssbd_mitigation(const struct arm64_cpu_capabilities *entry,
357 struct arm_smccc_res res;
358 bool required = true;
360 bool this_cpu_safe = false;
363 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
365 if (cpu_mitigations_off())
366 ssbd_state = ARM64_SSBD_FORCE_DISABLE;
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;
372 if (this_cpu_has_cap(ARM64_SSBS)) {
379 conduit = arm_smccc_1_1_invoke(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
380 ARM_SMCCC_ARCH_WORKAROUND_2, &res);
382 if (conduit == SMCCC_CONDUIT_NONE) {
383 ssbd_state = ARM64_SSBD_UNKNOWN;
392 case SMCCC_RET_NOT_SUPPORTED:
393 ssbd_state = ARM64_SSBD_UNKNOWN;
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;
404 case SMCCC_RET_SUCCESS:
409 case 1: /* Mitigation not required on this CPU */
420 switch (ssbd_state) {
421 case ARM64_SSBD_FORCE_DISABLE:
422 arm64_set_ssbd_mitigation(false);
426 case ARM64_SSBD_KERNEL:
428 __this_cpu_write(arm64_ssbd_callback_required, 1);
429 arm64_set_ssbd_mitigation(true);
433 case ARM64_SSBD_FORCE_ENABLE:
434 arm64_set_ssbd_mitigation(true);
444 switch (ssbd_state) {
445 case ARM64_SSBD_FORCE_DISABLE:
446 pr_info_once("%s disabled from command-line\n", entry->desc);
449 case ARM64_SSBD_FORCE_ENABLE:
450 pr_info_once("%s forced from command-line\n", entry->desc);
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),
466 #ifdef CONFIG_ARM64_ERRATUM_1463225
467 DEFINE_PER_CPU(int, __in_cortex_a76_erratum_1463225_wa);
470 has_cortex_a76_erratum_1463225(const struct arm64_cpu_capabilities *entry,
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);
477 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
478 return is_midr_in_range(midr, &range) && is_kernel_in_hyp_mode();
482 static void __maybe_unused
483 cpu_enable_cache_maint_trap(const struct arm64_cpu_capabilities *__unused)
485 sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCI, 0);
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)
492 #define CAP_MIDR_ALL_VERSIONS(model) \
493 .matches = is_affected_midr_range, \
494 .midr_range = MIDR_ALL_VERSIONS(model)
496 #define MIDR_FIXED(rev, revidr_mask) \
497 .fixed_revs = (struct arm64_midr_revidr[]){{ (rev), (revidr_mask) }, {}}
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)
503 #define CAP_MIDR_RANGE_LIST(list) \
504 .matches = is_affected_midr_range_list, \
505 .midr_range_list = list
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)
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)
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)
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)
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;
529 int get_spectre_v2_workaround_state(void)
531 if (__spectrev2_safe)
532 return ARM64_BP_HARDEN_NOT_REQUIRED;
534 if (!__hardenbp_enab)
535 return ARM64_BP_HARDEN_UNKNOWN;
537 return ARM64_BP_HARDEN_WA_NEEDED;
541 * List of CPUs that do not need any Spectre-v2 mitigation at all.
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),
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.
558 static bool __maybe_unused
559 check_branch_predictor(const struct arm64_cpu_capabilities *entry, int scope)
563 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
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))
570 /* Alternatively, we have a list of unaffected CPUs */
571 if (is_midr_in_range_list(read_cpuid_id(), spectre_v2_safe_list))
574 /* Fallback to firmware detection */
575 need_wa = detect_harden_bp_fw();
579 __spectrev2_safe = false;
581 if (!IS_ENABLED(CONFIG_HARDEN_BRANCH_PREDICTOR)) {
582 pr_warn_once("spectrev2 mitigation disabled by kernel configuration\n");
583 __hardenbp_enab = false;
588 if (__nospectre_v2 || cpu_mitigations_off()) {
589 pr_info_once("spectrev2 mitigation disabled by command line option\n");
590 __hardenbp_enab = false;
595 pr_warn_once("ARM_SMCCC_ARCH_WORKAROUND_1 missing from firmware\n");
596 __hardenbp_enab = false;
599 return (need_wa > 0);
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),
608 static bool __maybe_unused
609 needs_tx2_tvm_workaround(const struct arm64_cpu_capabilities *entry,
614 if (!is_affected_midr_range_list(entry, scope) ||
615 !is_hyp_mode_available())
618 for_each_possible_cpu(i) {
619 if (MPIDR_AFFINITY_LEVEL(cpu_logical_map(i), 0) != 0)
626 static bool __maybe_unused
627 has_neoverse_n1_erratum_1542419(const struct arm64_cpu_capabilities *entry,
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);
634 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
635 return is_midr_in_range(midr, &range) && has_dic;
638 #if defined(CONFIG_HARDEN_EL2_VECTORS) || defined(CONFIG_ARM64_ERRATUM_1319367)
640 static const struct midr_range ca57_a72[] = {
641 MIDR_ALL_VERSIONS(MIDR_CORTEX_A57),
642 MIDR_ALL_VERSIONS(MIDR_CORTEX_A72),
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
652 ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0)
655 .midr_range.model = MIDR_QCOM_KRYO,
656 .matches = is_kryo_midr,
659 #ifdef CONFIG_ARM64_ERRATUM_1286807
661 ERRATA_MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 0),
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),
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),
690 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003
691 static const struct arm64_cpu_capabilities qcom_erratum_1003_list[] = {
693 ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0),
696 .midr_range.model = MIDR_QCOM_KRYO,
697 .matches = is_kryo_midr,
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),
711 #ifdef CONFIG_ARM64_ERRATUM_819472
712 /* Cortex-A53 r0p[01] : ARM errata 819472 */
713 MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 1),
719 #ifdef CONFIG_ARM64_ERRATUM_1418040
721 * - 1188873 affects r0p0 to r2p0
722 * - 1418040 affects r0p0 to r3p1
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),
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),
743 #ifdef CONFIG_ARM64_ERRATUM_843419
744 static const struct arm64_cpu_capabilities erratum_843419_list[] = {
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)),
752 /* Brahma-B53 r0p[0] */
753 .matches = is_affected_midr_range,
754 ERRATA_MIDR_REV(MIDR_BRAHMA_B53, 0, 0),
760 #ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT_VHE
761 static const struct midr_range erratum_speculative_at_vhe_list[] = {
762 #ifdef CONFIG_ARM64_ERRATUM_1165522
763 /* Cortex A76 r0p0 to r2p0 */
764 MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 2, 0),
766 #ifdef CONFIG_ARM64_ERRATUM_1530923
767 /* Cortex A55 r0p0 to r2p0 */
768 MIDR_RANGE(MIDR_CORTEX_A55, 0, 0, 2, 0),
774 const struct arm64_cpu_capabilities arm64_errata[] = {
775 #ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE
777 .desc = "ARM errata 826319, 827319, 824069, 819472",
778 .capability = ARM64_WORKAROUND_CLEAN_CACHE,
779 ERRATA_MIDR_RANGE_LIST(workaround_clean_cache),
780 .cpu_enable = cpu_enable_cache_maint_trap,
783 #ifdef CONFIG_ARM64_ERRATUM_832075
785 /* Cortex-A57 r0p0 - r1p2 */
786 .desc = "ARM erratum 832075",
787 .capability = ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE,
788 ERRATA_MIDR_RANGE(MIDR_CORTEX_A57,
793 #ifdef CONFIG_ARM64_ERRATUM_834220
795 /* Cortex-A57 r0p0 - r1p2 */
796 .desc = "ARM erratum 834220",
797 .capability = ARM64_WORKAROUND_834220,
798 ERRATA_MIDR_RANGE(MIDR_CORTEX_A57,
803 #ifdef CONFIG_ARM64_ERRATUM_843419
805 .desc = "ARM erratum 843419",
806 .capability = ARM64_WORKAROUND_843419,
807 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
808 .matches = cpucap_multi_entry_cap_matches,
809 .match_list = erratum_843419_list,
812 #ifdef CONFIG_ARM64_ERRATUM_845719
814 .desc = "ARM erratum 845719",
815 .capability = ARM64_WORKAROUND_845719,
816 ERRATA_MIDR_RANGE_LIST(erratum_845719_list),
819 #ifdef CONFIG_CAVIUM_ERRATUM_23154
821 /* Cavium ThunderX, pass 1.x */
822 .desc = "Cavium erratum 23154",
823 .capability = ARM64_WORKAROUND_CAVIUM_23154,
824 ERRATA_MIDR_REV_RANGE(MIDR_THUNDERX, 0, 0, 1),
827 #ifdef CONFIG_CAVIUM_ERRATUM_27456
829 .desc = "Cavium erratum 27456",
830 .capability = ARM64_WORKAROUND_CAVIUM_27456,
831 ERRATA_MIDR_RANGE_LIST(cavium_erratum_27456_cpus),
834 #ifdef CONFIG_CAVIUM_ERRATUM_30115
836 .desc = "Cavium erratum 30115",
837 .capability = ARM64_WORKAROUND_CAVIUM_30115,
838 ERRATA_MIDR_RANGE_LIST(cavium_erratum_30115_cpus),
842 .desc = "Mismatched cache type (CTR_EL0)",
843 .capability = ARM64_MISMATCHED_CACHE_TYPE,
844 .matches = has_mismatched_cache_type,
845 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
846 .cpu_enable = cpu_enable_trap_ctr_access,
848 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003
850 .desc = "Qualcomm Technologies Falkor/Kryo erratum 1003",
851 .capability = ARM64_WORKAROUND_QCOM_FALKOR_E1003,
852 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
853 .matches = cpucap_multi_entry_cap_matches,
854 .match_list = qcom_erratum_1003_list,
857 #ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI
859 .desc = "Qualcomm erratum 1009, ARM erratum 1286807",
860 .capability = ARM64_WORKAROUND_REPEAT_TLBI,
861 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
862 .matches = cpucap_multi_entry_cap_matches,
863 .match_list = arm64_repeat_tlbi_list,
866 #ifdef CONFIG_ARM64_ERRATUM_858921
868 /* Cortex-A73 all versions */
869 .desc = "ARM erratum 858921",
870 .capability = ARM64_WORKAROUND_858921,
871 ERRATA_MIDR_ALL_VERSIONS(MIDR_CORTEX_A73),
875 .capability = ARM64_HARDEN_BRANCH_PREDICTOR,
876 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
877 .matches = check_branch_predictor,
879 #ifdef CONFIG_HARDEN_EL2_VECTORS
881 .desc = "EL2 vector hardening",
882 .capability = ARM64_HARDEN_EL2_VECTORS,
883 ERRATA_MIDR_RANGE_LIST(ca57_a72),
887 .desc = "Speculative Store Bypass Disable",
888 .capability = ARM64_SSBD,
889 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
890 .matches = has_ssbd_mitigation,
891 .midr_range_list = arm64_ssb_cpus,
893 #ifdef CONFIG_ARM64_ERRATUM_1418040
895 .desc = "ARM erratum 1418040",
896 .capability = ARM64_WORKAROUND_1418040,
897 ERRATA_MIDR_RANGE_LIST(erratum_1418040_list),
900 #ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT_VHE
902 .desc = "ARM errata 1165522, 1530923",
903 .capability = ARM64_WORKAROUND_SPECULATIVE_AT_VHE,
904 ERRATA_MIDR_RANGE_LIST(erratum_speculative_at_vhe_list),
907 #ifdef CONFIG_ARM64_ERRATUM_1463225
909 .desc = "ARM erratum 1463225",
910 .capability = ARM64_WORKAROUND_1463225,
911 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
912 .matches = has_cortex_a76_erratum_1463225,
915 #ifdef CONFIG_CAVIUM_TX2_ERRATUM_219
917 .desc = "Cavium ThunderX2 erratum 219 (KVM guest sysreg trapping)",
918 .capability = ARM64_WORKAROUND_CAVIUM_TX2_219_TVM,
919 ERRATA_MIDR_RANGE_LIST(tx2_family_cpus),
920 .matches = needs_tx2_tvm_workaround,
923 .desc = "Cavium ThunderX2 erratum 219 (PRFM removal)",
924 .capability = ARM64_WORKAROUND_CAVIUM_TX2_219_PRFM,
925 ERRATA_MIDR_RANGE_LIST(tx2_family_cpus),
928 #ifdef CONFIG_ARM64_ERRATUM_1542419
930 /* we depend on the firmware portion for correctness */
931 .desc = "ARM erratum 1542419 (kernel portion)",
932 .capability = ARM64_WORKAROUND_1542419,
933 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
934 .matches = has_neoverse_n1_erratum_1542419,
935 .cpu_enable = cpu_enable_trap_ctr_access,
938 #ifdef CONFIG_ARM64_ERRATUM_1319367
940 .desc = "ARM erratum 1319367",
941 .capability = ARM64_WORKAROUND_SPECULATIVE_AT_NVHE,
942 ERRATA_MIDR_RANGE_LIST(ca57_a72),
949 ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr,
952 return sprintf(buf, "Mitigation: __user pointer sanitization\n");
955 ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr,
958 switch (get_spectre_v2_workaround_state()) {
959 case ARM64_BP_HARDEN_NOT_REQUIRED:
960 return sprintf(buf, "Not affected\n");
961 case ARM64_BP_HARDEN_WA_NEEDED:
962 return sprintf(buf, "Mitigation: Branch predictor hardening\n");
963 case ARM64_BP_HARDEN_UNKNOWN:
965 return sprintf(buf, "Vulnerable\n");
969 ssize_t cpu_show_spec_store_bypass(struct device *dev,
970 struct device_attribute *attr, char *buf)
973 return sprintf(buf, "Not affected\n");
975 switch (ssbd_state) {
976 case ARM64_SSBD_KERNEL:
977 case ARM64_SSBD_FORCE_ENABLE:
978 if (IS_ENABLED(CONFIG_ARM64_SSBD))
980 "Mitigation: Speculative Store Bypass disabled via prctl\n");
983 return sprintf(buf, "Vulnerable\n");