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/psci.h>
10 #include <linux/types.h>
11 #include <linux/cpu.h>
13 #include <asm/cputype.h>
14 #include <asm/cpufeature.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 *__unused)
93 u64 mask = arm64_ftr_reg_ctrel0.strict_mask;
95 /* Trap CTR_EL0 access on this CPU, only if it has a mismatch */
96 if ((read_cpuid_cachetype() & mask) !=
97 (arm64_ftr_reg_ctrel0.sys_val & mask))
98 sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCT, 0);
101 atomic_t arm64_el2_vector_last_slot = ATOMIC_INIT(-1);
103 #include <asm/mmu_context.h>
104 #include <asm/cacheflush.h>
106 DEFINE_PER_CPU_READ_MOSTLY(struct bp_hardening_data, bp_hardening_data);
108 #ifdef CONFIG_KVM_INDIRECT_VECTORS
109 extern char __smccc_workaround_1_smc_start[];
110 extern char __smccc_workaround_1_smc_end[];
112 static void __copy_hyp_vect_bpi(int slot, const char *hyp_vecs_start,
113 const char *hyp_vecs_end)
115 void *dst = lm_alias(__bp_harden_hyp_vecs_start + slot * SZ_2K);
118 for (i = 0; i < SZ_2K; i += 0x80)
119 memcpy(dst + i, hyp_vecs_start, hyp_vecs_end - hyp_vecs_start);
121 __flush_icache_range((uintptr_t)dst, (uintptr_t)dst + SZ_2K);
124 static void install_bp_hardening_cb(bp_hardening_cb_t fn,
125 const char *hyp_vecs_start,
126 const char *hyp_vecs_end)
128 static DEFINE_RAW_SPINLOCK(bp_lock);
132 * detect_harden_bp_fw() passes NULL for the hyp_vecs start/end if
133 * we're a guest. Skip the hyp-vectors work.
135 if (!hyp_vecs_start) {
136 __this_cpu_write(bp_hardening_data.fn, fn);
140 raw_spin_lock(&bp_lock);
141 for_each_possible_cpu(cpu) {
142 if (per_cpu(bp_hardening_data.fn, cpu) == fn) {
143 slot = per_cpu(bp_hardening_data.hyp_vectors_slot, cpu);
149 slot = atomic_inc_return(&arm64_el2_vector_last_slot);
150 BUG_ON(slot >= BP_HARDEN_EL2_SLOTS);
151 __copy_hyp_vect_bpi(slot, hyp_vecs_start, hyp_vecs_end);
154 __this_cpu_write(bp_hardening_data.hyp_vectors_slot, slot);
155 __this_cpu_write(bp_hardening_data.fn, fn);
156 raw_spin_unlock(&bp_lock);
159 #define __smccc_workaround_1_smc_start NULL
160 #define __smccc_workaround_1_smc_end NULL
162 static void install_bp_hardening_cb(bp_hardening_cb_t fn,
163 const char *hyp_vecs_start,
164 const char *hyp_vecs_end)
166 __this_cpu_write(bp_hardening_data.fn, fn);
168 #endif /* CONFIG_KVM_INDIRECT_VECTORS */
170 #include <uapi/linux/psci.h>
171 #include <linux/arm-smccc.h>
172 #include <linux/psci.h>
174 static void 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 if (psci_ops.smccc_version == SMCCC_VERSION_1_0)
219 switch (psci_ops.conduit) {
220 case PSCI_CONDUIT_HVC:
221 arm_smccc_1_1_hvc(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
222 ARM_SMCCC_ARCH_WORKAROUND_1, &res);
223 switch ((int)res.a0) {
225 /* Firmware says we're just fine */
228 cb = call_hvc_arch_workaround_1;
229 /* This is a guest, no need to patch KVM vectors */
238 case PSCI_CONDUIT_SMC:
239 arm_smccc_1_1_smc(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
240 ARM_SMCCC_ARCH_WORKAROUND_1, &res);
241 switch ((int)res.a0) {
243 /* Firmware says we're just fine */
246 cb = call_smc_arch_workaround_1;
247 smccc_start = __smccc_workaround_1_smc_start;
248 smccc_end = __smccc_workaround_1_smc_end;
259 if (((midr & MIDR_CPU_MODEL_MASK) == MIDR_QCOM_FALKOR) ||
260 ((midr & MIDR_CPU_MODEL_MASK) == MIDR_QCOM_FALKOR_V1))
261 cb = qcom_link_stack_sanitization;
263 if (IS_ENABLED(CONFIG_HARDEN_BRANCH_PREDICTOR))
264 install_bp_hardening_cb(cb, smccc_start, smccc_end);
269 DEFINE_PER_CPU_READ_MOSTLY(u64, arm64_ssbd_callback_required);
271 int ssbd_state __read_mostly = ARM64_SSBD_KERNEL;
272 static bool __ssb_safe = true;
274 static const struct ssbd_options {
278 { "force-on", ARM64_SSBD_FORCE_ENABLE, },
279 { "force-off", ARM64_SSBD_FORCE_DISABLE, },
280 { "kernel", ARM64_SSBD_KERNEL, },
283 static int __init ssbd_cfg(char *buf)
290 for (i = 0; i < ARRAY_SIZE(ssbd_options); i++) {
291 int len = strlen(ssbd_options[i].str);
293 if (strncmp(buf, ssbd_options[i].str, len))
296 ssbd_state = ssbd_options[i].state;
302 early_param("ssbd", ssbd_cfg);
304 void __init arm64_update_smccc_conduit(struct alt_instr *alt,
305 __le32 *origptr, __le32 *updptr,
310 BUG_ON(nr_inst != 1);
312 switch (psci_ops.conduit) {
313 case PSCI_CONDUIT_HVC:
314 insn = aarch64_insn_get_hvc_value();
316 case PSCI_CONDUIT_SMC:
317 insn = aarch64_insn_get_smc_value();
323 *updptr = cpu_to_le32(insn);
326 void __init arm64_enable_wa2_handling(struct alt_instr *alt,
327 __le32 *origptr, __le32 *updptr,
330 BUG_ON(nr_inst != 1);
332 * Only allow mitigation on EL1 entry/exit and guest
333 * ARCH_WORKAROUND_2 handling if the SSBD state allows it to
336 if (arm64_get_ssbd_state() == ARM64_SSBD_KERNEL)
337 *updptr = cpu_to_le32(aarch64_insn_gen_nop());
340 void arm64_set_ssbd_mitigation(bool state)
342 if (!IS_ENABLED(CONFIG_ARM64_SSBD)) {
343 pr_info_once("SSBD disabled by kernel configuration\n");
347 if (this_cpu_has_cap(ARM64_SSBS)) {
349 asm volatile(SET_PSTATE_SSBS(0));
351 asm volatile(SET_PSTATE_SSBS(1));
355 switch (psci_ops.conduit) {
356 case PSCI_CONDUIT_HVC:
357 arm_smccc_1_1_hvc(ARM_SMCCC_ARCH_WORKAROUND_2, state, NULL);
360 case PSCI_CONDUIT_SMC:
361 arm_smccc_1_1_smc(ARM_SMCCC_ARCH_WORKAROUND_2, state, NULL);
370 static bool has_ssbd_mitigation(const struct arm64_cpu_capabilities *entry,
373 struct arm_smccc_res res;
374 bool required = true;
376 bool this_cpu_safe = false;
378 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
380 if (cpu_mitigations_off())
381 ssbd_state = ARM64_SSBD_FORCE_DISABLE;
383 /* delay setting __ssb_safe until we get a firmware response */
384 if (is_midr_in_range_list(read_cpuid_id(), entry->midr_range_list))
385 this_cpu_safe = true;
387 if (this_cpu_has_cap(ARM64_SSBS)) {
394 if (psci_ops.smccc_version == SMCCC_VERSION_1_0) {
395 ssbd_state = ARM64_SSBD_UNKNOWN;
401 switch (psci_ops.conduit) {
402 case PSCI_CONDUIT_HVC:
403 arm_smccc_1_1_hvc(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
404 ARM_SMCCC_ARCH_WORKAROUND_2, &res);
407 case PSCI_CONDUIT_SMC:
408 arm_smccc_1_1_smc(ARM_SMCCC_ARCH_FEATURES_FUNC_ID,
409 ARM_SMCCC_ARCH_WORKAROUND_2, &res);
413 ssbd_state = ARM64_SSBD_UNKNOWN;
422 case SMCCC_RET_NOT_SUPPORTED:
423 ssbd_state = ARM64_SSBD_UNKNOWN;
428 /* machines with mixed mitigation requirements must not return this */
429 case SMCCC_RET_NOT_REQUIRED:
430 pr_info_once("%s mitigation not required\n", entry->desc);
431 ssbd_state = ARM64_SSBD_MITIGATED;
434 case SMCCC_RET_SUCCESS:
439 case 1: /* Mitigation not required on this CPU */
450 switch (ssbd_state) {
451 case ARM64_SSBD_FORCE_DISABLE:
452 arm64_set_ssbd_mitigation(false);
456 case ARM64_SSBD_KERNEL:
458 __this_cpu_write(arm64_ssbd_callback_required, 1);
459 arm64_set_ssbd_mitigation(true);
463 case ARM64_SSBD_FORCE_ENABLE:
464 arm64_set_ssbd_mitigation(true);
474 switch (ssbd_state) {
475 case ARM64_SSBD_FORCE_DISABLE:
476 pr_info_once("%s disabled from command-line\n", entry->desc);
479 case ARM64_SSBD_FORCE_ENABLE:
480 pr_info_once("%s forced from command-line\n", entry->desc);
487 /* known invulnerable cores */
488 static const struct midr_range arm64_ssb_cpus[] = {
489 MIDR_ALL_VERSIONS(MIDR_CORTEX_A35),
490 MIDR_ALL_VERSIONS(MIDR_CORTEX_A53),
491 MIDR_ALL_VERSIONS(MIDR_CORTEX_A55),
495 #ifdef CONFIG_ARM64_ERRATUM_1463225
496 DEFINE_PER_CPU(int, __in_cortex_a76_erratum_1463225_wa);
499 has_cortex_a76_erratum_1463225(const struct arm64_cpu_capabilities *entry,
502 u32 midr = read_cpuid_id();
503 /* Cortex-A76 r0p0 - r3p1 */
504 struct midr_range range = MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 1);
506 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
507 return is_midr_in_range(midr, &range) && is_kernel_in_hyp_mode();
511 static void __maybe_unused
512 cpu_enable_cache_maint_trap(const struct arm64_cpu_capabilities *__unused)
514 sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCI, 0);
517 #define CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max) \
518 .matches = is_affected_midr_range, \
519 .midr_range = MIDR_RANGE(model, v_min, r_min, v_max, r_max)
521 #define CAP_MIDR_ALL_VERSIONS(model) \
522 .matches = is_affected_midr_range, \
523 .midr_range = MIDR_ALL_VERSIONS(model)
525 #define MIDR_FIXED(rev, revidr_mask) \
526 .fixed_revs = (struct arm64_midr_revidr[]){{ (rev), (revidr_mask) }, {}}
528 #define ERRATA_MIDR_RANGE(model, v_min, r_min, v_max, r_max) \
529 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, \
530 CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max)
532 #define CAP_MIDR_RANGE_LIST(list) \
533 .matches = is_affected_midr_range_list, \
534 .midr_range_list = list
536 /* Errata affecting a range of revisions of given model variant */
537 #define ERRATA_MIDR_REV_RANGE(m, var, r_min, r_max) \
538 ERRATA_MIDR_RANGE(m, var, r_min, var, r_max)
540 /* Errata affecting a single variant/revision of a model */
541 #define ERRATA_MIDR_REV(model, var, rev) \
542 ERRATA_MIDR_RANGE(model, var, rev, var, rev)
544 /* Errata affecting all variants/revisions of a given a model */
545 #define ERRATA_MIDR_ALL_VERSIONS(model) \
546 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, \
547 CAP_MIDR_ALL_VERSIONS(model)
549 /* Errata affecting a list of midr ranges, with same work around */
550 #define ERRATA_MIDR_RANGE_LIST(midr_list) \
551 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, \
552 CAP_MIDR_RANGE_LIST(midr_list)
554 /* Track overall mitigation state. We are only mitigated if all cores are ok */
555 static bool __hardenbp_enab = true;
556 static bool __spectrev2_safe = true;
558 int get_spectre_v2_workaround_state(void)
560 if (__spectrev2_safe)
561 return ARM64_BP_HARDEN_NOT_REQUIRED;
563 if (!__hardenbp_enab)
564 return ARM64_BP_HARDEN_UNKNOWN;
566 return ARM64_BP_HARDEN_WA_NEEDED;
570 * List of CPUs that do not need any Spectre-v2 mitigation at all.
572 static const struct midr_range spectre_v2_safe_list[] = {
573 MIDR_ALL_VERSIONS(MIDR_CORTEX_A35),
574 MIDR_ALL_VERSIONS(MIDR_CORTEX_A53),
575 MIDR_ALL_VERSIONS(MIDR_CORTEX_A55),
580 * Track overall bp hardening for all heterogeneous cores in the machine.
581 * We are only considered "safe" if all booted cores are known safe.
583 static bool __maybe_unused
584 check_branch_predictor(const struct arm64_cpu_capabilities *entry, int scope)
588 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
590 /* If the CPU has CSV2 set, we're safe */
591 if (cpuid_feature_extract_unsigned_field(read_cpuid(ID_AA64PFR0_EL1),
592 ID_AA64PFR0_CSV2_SHIFT))
595 /* Alternatively, we have a list of unaffected CPUs */
596 if (is_midr_in_range_list(read_cpuid_id(), spectre_v2_safe_list))
599 /* Fallback to firmware detection */
600 need_wa = detect_harden_bp_fw();
604 __spectrev2_safe = false;
606 if (!IS_ENABLED(CONFIG_HARDEN_BRANCH_PREDICTOR)) {
607 pr_warn_once("spectrev2 mitigation disabled by kernel configuration\n");
608 __hardenbp_enab = false;
613 if (__nospectre_v2 || cpu_mitigations_off()) {
614 pr_info_once("spectrev2 mitigation disabled by command line option\n");
615 __hardenbp_enab = false;
620 pr_warn_once("ARM_SMCCC_ARCH_WORKAROUND_1 missing from firmware\n");
621 __hardenbp_enab = false;
624 return (need_wa > 0);
627 static const __maybe_unused struct midr_range tx2_family_cpus[] = {
628 MIDR_ALL_VERSIONS(MIDR_BRCM_VULCAN),
629 MIDR_ALL_VERSIONS(MIDR_CAVIUM_THUNDERX2),
633 static bool __maybe_unused
634 needs_tx2_tvm_workaround(const struct arm64_cpu_capabilities *entry,
639 if (!is_affected_midr_range_list(entry, scope) ||
640 !is_hyp_mode_available())
643 for_each_possible_cpu(i) {
644 if (MPIDR_AFFINITY_LEVEL(cpu_logical_map(i), 0) != 0)
651 #ifdef CONFIG_HARDEN_EL2_VECTORS
653 static const struct midr_range arm64_harden_el2_vectors[] = {
654 MIDR_ALL_VERSIONS(MIDR_CORTEX_A57),
655 MIDR_ALL_VERSIONS(MIDR_CORTEX_A72),
661 #ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI
662 static const struct arm64_cpu_capabilities arm64_repeat_tlbi_list[] = {
663 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1009
665 ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0)
668 .midr_range.model = MIDR_QCOM_KRYO,
669 .matches = is_kryo_midr,
672 #ifdef CONFIG_ARM64_ERRATUM_1286807
674 ERRATA_MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 0),
681 #ifdef CONFIG_CAVIUM_ERRATUM_27456
682 const struct midr_range cavium_erratum_27456_cpus[] = {
683 /* Cavium ThunderX, T88 pass 1.x - 2.1 */
684 MIDR_RANGE(MIDR_THUNDERX, 0, 0, 1, 1),
685 /* Cavium ThunderX, T81 pass 1.0 */
686 MIDR_REV(MIDR_THUNDERX_81XX, 0, 0),
691 #ifdef CONFIG_CAVIUM_ERRATUM_30115
692 static const struct midr_range cavium_erratum_30115_cpus[] = {
693 /* Cavium ThunderX, T88 pass 1.x - 2.2 */
694 MIDR_RANGE(MIDR_THUNDERX, 0, 0, 1, 2),
695 /* Cavium ThunderX, T81 pass 1.0 - 1.2 */
696 MIDR_REV_RANGE(MIDR_THUNDERX_81XX, 0, 0, 2),
697 /* Cavium ThunderX, T83 pass 1.0 */
698 MIDR_REV(MIDR_THUNDERX_83XX, 0, 0),
703 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003
704 static const struct arm64_cpu_capabilities qcom_erratum_1003_list[] = {
706 ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0),
709 .midr_range.model = MIDR_QCOM_KRYO,
710 .matches = is_kryo_midr,
716 #ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE
717 static const struct midr_range workaround_clean_cache[] = {
718 #if defined(CONFIG_ARM64_ERRATUM_826319) || \
719 defined(CONFIG_ARM64_ERRATUM_827319) || \
720 defined(CONFIG_ARM64_ERRATUM_824069)
721 /* Cortex-A53 r0p[012]: ARM errata 826319, 827319, 824069 */
722 MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 2),
724 #ifdef CONFIG_ARM64_ERRATUM_819472
725 /* Cortex-A53 r0p[01] : ARM errata 819472 */
726 MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 1),
732 #ifdef CONFIG_ARM64_ERRATUM_1418040
734 * - 1188873 affects r0p0 to r2p0
735 * - 1418040 affects r0p0 to r3p1
737 static const struct midr_range erratum_1418040_list[] = {
738 /* Cortex-A76 r0p0 to r3p1 */
739 MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 1),
740 /* Neoverse-N1 r0p0 to r3p1 */
741 MIDR_RANGE(MIDR_NEOVERSE_N1, 0, 0, 3, 1),
746 const struct arm64_cpu_capabilities arm64_errata[] = {
747 #ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE
749 .desc = "ARM errata 826319, 827319, 824069, 819472",
750 .capability = ARM64_WORKAROUND_CLEAN_CACHE,
751 ERRATA_MIDR_RANGE_LIST(workaround_clean_cache),
752 .cpu_enable = cpu_enable_cache_maint_trap,
755 #ifdef CONFIG_ARM64_ERRATUM_832075
757 /* Cortex-A57 r0p0 - r1p2 */
758 .desc = "ARM erratum 832075",
759 .capability = ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE,
760 ERRATA_MIDR_RANGE(MIDR_CORTEX_A57,
765 #ifdef CONFIG_ARM64_ERRATUM_834220
767 /* Cortex-A57 r0p0 - r1p2 */
768 .desc = "ARM erratum 834220",
769 .capability = ARM64_WORKAROUND_834220,
770 ERRATA_MIDR_RANGE(MIDR_CORTEX_A57,
775 #ifdef CONFIG_ARM64_ERRATUM_843419
777 /* Cortex-A53 r0p[01234] */
778 .desc = "ARM erratum 843419",
779 .capability = ARM64_WORKAROUND_843419,
780 ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4),
781 MIDR_FIXED(0x4, BIT(8)),
784 #ifdef CONFIG_ARM64_ERRATUM_845719
786 /* Cortex-A53 r0p[01234] */
787 .desc = "ARM erratum 845719",
788 .capability = ARM64_WORKAROUND_845719,
789 ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4),
792 #ifdef CONFIG_CAVIUM_ERRATUM_23154
794 /* Cavium ThunderX, pass 1.x */
795 .desc = "Cavium erratum 23154",
796 .capability = ARM64_WORKAROUND_CAVIUM_23154,
797 ERRATA_MIDR_REV_RANGE(MIDR_THUNDERX, 0, 0, 1),
800 #ifdef CONFIG_CAVIUM_ERRATUM_27456
802 .desc = "Cavium erratum 27456",
803 .capability = ARM64_WORKAROUND_CAVIUM_27456,
804 ERRATA_MIDR_RANGE_LIST(cavium_erratum_27456_cpus),
807 #ifdef CONFIG_CAVIUM_ERRATUM_30115
809 .desc = "Cavium erratum 30115",
810 .capability = ARM64_WORKAROUND_CAVIUM_30115,
811 ERRATA_MIDR_RANGE_LIST(cavium_erratum_30115_cpus),
815 .desc = "Mismatched cache type (CTR_EL0)",
816 .capability = ARM64_MISMATCHED_CACHE_TYPE,
817 .matches = has_mismatched_cache_type,
818 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
819 .cpu_enable = cpu_enable_trap_ctr_access,
821 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003
823 .desc = "Qualcomm Technologies Falkor/Kryo erratum 1003",
824 .capability = ARM64_WORKAROUND_QCOM_FALKOR_E1003,
825 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
826 .matches = cpucap_multi_entry_cap_matches,
827 .match_list = qcom_erratum_1003_list,
830 #ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI
832 .desc = "Qualcomm erratum 1009, ARM erratum 1286807",
833 .capability = ARM64_WORKAROUND_REPEAT_TLBI,
834 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
835 .matches = cpucap_multi_entry_cap_matches,
836 .match_list = arm64_repeat_tlbi_list,
839 #ifdef CONFIG_ARM64_ERRATUM_858921
841 /* Cortex-A73 all versions */
842 .desc = "ARM erratum 858921",
843 .capability = ARM64_WORKAROUND_858921,
844 ERRATA_MIDR_ALL_VERSIONS(MIDR_CORTEX_A73),
848 .capability = ARM64_HARDEN_BRANCH_PREDICTOR,
849 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
850 .matches = check_branch_predictor,
852 #ifdef CONFIG_HARDEN_EL2_VECTORS
854 .desc = "EL2 vector hardening",
855 .capability = ARM64_HARDEN_EL2_VECTORS,
856 ERRATA_MIDR_RANGE_LIST(arm64_harden_el2_vectors),
860 .desc = "Speculative Store Bypass Disable",
861 .capability = ARM64_SSBD,
862 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
863 .matches = has_ssbd_mitigation,
864 .midr_range_list = arm64_ssb_cpus,
866 #ifdef CONFIG_ARM64_ERRATUM_1418040
868 .desc = "ARM erratum 1418040",
869 .capability = ARM64_WORKAROUND_1418040,
870 ERRATA_MIDR_RANGE_LIST(erratum_1418040_list),
873 #ifdef CONFIG_ARM64_ERRATUM_1165522
875 /* Cortex-A76 r0p0 to r2p0 */
876 .desc = "ARM erratum 1165522",
877 .capability = ARM64_WORKAROUND_1165522,
878 ERRATA_MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 2, 0),
881 #ifdef CONFIG_ARM64_ERRATUM_1463225
883 .desc = "ARM erratum 1463225",
884 .capability = ARM64_WORKAROUND_1463225,
885 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
886 .matches = has_cortex_a76_erratum_1463225,
889 #ifdef CONFIG_CAVIUM_TX2_ERRATUM_219
891 .desc = "Cavium ThunderX2 erratum 219 (KVM guest sysreg trapping)",
892 .capability = ARM64_WORKAROUND_CAVIUM_TX2_219_TVM,
893 ERRATA_MIDR_RANGE_LIST(tx2_family_cpus),
894 .matches = needs_tx2_tvm_workaround,
897 .desc = "Cavium ThunderX2 erratum 219 (PRFM removal)",
898 .capability = ARM64_WORKAROUND_CAVIUM_TX2_219_PRFM,
899 ERRATA_MIDR_RANGE_LIST(tx2_family_cpus),
906 ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr,
909 return sprintf(buf, "Mitigation: __user pointer sanitization\n");
912 ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr,
915 switch (get_spectre_v2_workaround_state()) {
916 case ARM64_BP_HARDEN_NOT_REQUIRED:
917 return sprintf(buf, "Not affected\n");
918 case ARM64_BP_HARDEN_WA_NEEDED:
919 return sprintf(buf, "Mitigation: Branch predictor hardening\n");
920 case ARM64_BP_HARDEN_UNKNOWN:
922 return sprintf(buf, "Vulnerable\n");
926 ssize_t cpu_show_spec_store_bypass(struct device *dev,
927 struct device_attribute *attr, char *buf)
930 return sprintf(buf, "Not affected\n");
932 switch (ssbd_state) {
933 case ARM64_SSBD_KERNEL:
934 case ARM64_SSBD_FORCE_ENABLE:
935 if (IS_ENABLED(CONFIG_ARM64_SSBD))
937 "Mitigation: Speculative Store Bypass disabled via prctl\n");
940 return sprintf(buf, "Vulnerable\n");