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 #ifdef CONFIG_ARM64_ERRATUM_1463225
111 has_cortex_a76_erratum_1463225(const struct arm64_cpu_capabilities *entry,
114 return is_affected_midr_range_list(entry, scope) && is_kernel_in_hyp_mode();
118 static void __maybe_unused
119 cpu_enable_cache_maint_trap(const struct arm64_cpu_capabilities *__unused)
121 sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCI, 0);
124 #define CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max) \
125 .matches = is_affected_midr_range, \
126 .midr_range = MIDR_RANGE(model, v_min, r_min, v_max, r_max)
128 #define CAP_MIDR_ALL_VERSIONS(model) \
129 .matches = is_affected_midr_range, \
130 .midr_range = MIDR_ALL_VERSIONS(model)
132 #define MIDR_FIXED(rev, revidr_mask) \
133 .fixed_revs = (struct arm64_midr_revidr[]){{ (rev), (revidr_mask) }, {}}
135 #define ERRATA_MIDR_RANGE(model, v_min, r_min, v_max, r_max) \
136 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, \
137 CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max)
139 #define CAP_MIDR_RANGE_LIST(list) \
140 .matches = is_affected_midr_range_list, \
141 .midr_range_list = list
143 /* Errata affecting a range of revisions of given model variant */
144 #define ERRATA_MIDR_REV_RANGE(m, var, r_min, r_max) \
145 ERRATA_MIDR_RANGE(m, var, r_min, var, r_max)
147 /* Errata affecting a single variant/revision of a model */
148 #define ERRATA_MIDR_REV(model, var, rev) \
149 ERRATA_MIDR_RANGE(model, var, rev, var, rev)
151 /* Errata affecting all variants/revisions of a given a model */
152 #define ERRATA_MIDR_ALL_VERSIONS(model) \
153 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, \
154 CAP_MIDR_ALL_VERSIONS(model)
156 /* Errata affecting a list of midr ranges, with same work around */
157 #define ERRATA_MIDR_RANGE_LIST(midr_list) \
158 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, \
159 CAP_MIDR_RANGE_LIST(midr_list)
161 static const __maybe_unused struct midr_range tx2_family_cpus[] = {
162 MIDR_ALL_VERSIONS(MIDR_BRCM_VULCAN),
163 MIDR_ALL_VERSIONS(MIDR_CAVIUM_THUNDERX2),
167 static bool __maybe_unused
168 needs_tx2_tvm_workaround(const struct arm64_cpu_capabilities *entry,
173 if (!is_affected_midr_range_list(entry, scope) ||
174 !is_hyp_mode_available())
177 for_each_possible_cpu(i) {
178 if (MPIDR_AFFINITY_LEVEL(cpu_logical_map(i), 0) != 0)
185 static bool __maybe_unused
186 has_neoverse_n1_erratum_1542419(const struct arm64_cpu_capabilities *entry,
189 u32 midr = read_cpuid_id();
190 bool has_dic = read_cpuid_cachetype() & BIT(CTR_DIC_SHIFT);
191 const struct midr_range range = MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N1);
193 WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
194 return is_midr_in_range(midr, &range) && has_dic;
197 #ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI
198 static const struct arm64_cpu_capabilities arm64_repeat_tlbi_list[] = {
199 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1009
201 ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0)
204 .midr_range.model = MIDR_QCOM_KRYO,
205 .matches = is_kryo_midr,
208 #ifdef CONFIG_ARM64_ERRATUM_1286807
210 ERRATA_MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 0),
217 #ifdef CONFIG_CAVIUM_ERRATUM_27456
218 const struct midr_range cavium_erratum_27456_cpus[] = {
219 /* Cavium ThunderX, T88 pass 1.x - 2.1 */
220 MIDR_RANGE(MIDR_THUNDERX, 0, 0, 1, 1),
221 /* Cavium ThunderX, T81 pass 1.0 */
222 MIDR_REV(MIDR_THUNDERX_81XX, 0, 0),
227 #ifdef CONFIG_CAVIUM_ERRATUM_30115
228 static const struct midr_range cavium_erratum_30115_cpus[] = {
229 /* Cavium ThunderX, T88 pass 1.x - 2.2 */
230 MIDR_RANGE(MIDR_THUNDERX, 0, 0, 1, 2),
231 /* Cavium ThunderX, T81 pass 1.0 - 1.2 */
232 MIDR_REV_RANGE(MIDR_THUNDERX_81XX, 0, 0, 2),
233 /* Cavium ThunderX, T83 pass 1.0 */
234 MIDR_REV(MIDR_THUNDERX_83XX, 0, 0),
239 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003
240 static const struct arm64_cpu_capabilities qcom_erratum_1003_list[] = {
242 ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0),
245 .midr_range.model = MIDR_QCOM_KRYO,
246 .matches = is_kryo_midr,
252 #ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE
253 static const struct midr_range workaround_clean_cache[] = {
254 #if defined(CONFIG_ARM64_ERRATUM_826319) || \
255 defined(CONFIG_ARM64_ERRATUM_827319) || \
256 defined(CONFIG_ARM64_ERRATUM_824069)
257 /* Cortex-A53 r0p[012]: ARM errata 826319, 827319, 824069 */
258 MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 2),
260 #ifdef CONFIG_ARM64_ERRATUM_819472
261 /* Cortex-A53 r0p[01] : ARM errata 819472 */
262 MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 1),
268 #ifdef CONFIG_ARM64_ERRATUM_1418040
270 * - 1188873 affects r0p0 to r2p0
271 * - 1418040 affects r0p0 to r3p1
273 static const struct midr_range erratum_1418040_list[] = {
274 /* Cortex-A76 r0p0 to r3p1 */
275 MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 1),
276 /* Neoverse-N1 r0p0 to r3p1 */
277 MIDR_RANGE(MIDR_NEOVERSE_N1, 0, 0, 3, 1),
278 /* Kryo4xx Gold (rcpe to rfpf) => (r0p0 to r3p1) */
279 MIDR_RANGE(MIDR_QCOM_KRYO_4XX_GOLD, 0xc, 0xe, 0xf, 0xf),
284 #ifdef CONFIG_ARM64_ERRATUM_845719
285 static const struct midr_range erratum_845719_list[] = {
286 /* Cortex-A53 r0p[01234] */
287 MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4),
288 /* Brahma-B53 r0p[0] */
289 MIDR_REV(MIDR_BRAHMA_B53, 0, 0),
290 /* Kryo2XX Silver rAp4 */
291 MIDR_REV(MIDR_QCOM_KRYO_2XX_SILVER, 0xa, 0x4),
296 #ifdef CONFIG_ARM64_ERRATUM_843419
297 static const struct arm64_cpu_capabilities erratum_843419_list[] = {
299 /* Cortex-A53 r0p[01234] */
300 .matches = is_affected_midr_range,
301 ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4),
302 MIDR_FIXED(0x4, BIT(8)),
305 /* Brahma-B53 r0p[0] */
306 .matches = is_affected_midr_range,
307 ERRATA_MIDR_REV(MIDR_BRAHMA_B53, 0, 0),
313 #ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT
314 static const struct midr_range erratum_speculative_at_list[] = {
315 #ifdef CONFIG_ARM64_ERRATUM_1165522
316 /* Cortex A76 r0p0 to r2p0 */
317 MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 2, 0),
319 #ifdef CONFIG_ARM64_ERRATUM_1319367
320 MIDR_ALL_VERSIONS(MIDR_CORTEX_A57),
321 MIDR_ALL_VERSIONS(MIDR_CORTEX_A72),
323 #ifdef CONFIG_ARM64_ERRATUM_1530923
324 /* Cortex A55 r0p0 to r2p0 */
325 MIDR_RANGE(MIDR_CORTEX_A55, 0, 0, 2, 0),
326 /* Kryo4xx Silver (rdpe => r1p0) */
327 MIDR_REV(MIDR_QCOM_KRYO_4XX_SILVER, 0xd, 0xe),
333 #ifdef CONFIG_ARM64_ERRATUM_1463225
334 static const struct midr_range erratum_1463225[] = {
335 /* Cortex-A76 r0p0 - r3p1 */
336 MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 1),
337 /* Kryo4xx Gold (rcpe to rfpf) => (r0p0 to r3p1) */
338 MIDR_RANGE(MIDR_QCOM_KRYO_4XX_GOLD, 0xc, 0xe, 0xf, 0xf),
343 const struct arm64_cpu_capabilities arm64_errata[] = {
344 #ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE
346 .desc = "ARM errata 826319, 827319, 824069, or 819472",
347 .capability = ARM64_WORKAROUND_CLEAN_CACHE,
348 ERRATA_MIDR_RANGE_LIST(workaround_clean_cache),
349 .cpu_enable = cpu_enable_cache_maint_trap,
352 #ifdef CONFIG_ARM64_ERRATUM_832075
354 /* Cortex-A57 r0p0 - r1p2 */
355 .desc = "ARM erratum 832075",
356 .capability = ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE,
357 ERRATA_MIDR_RANGE(MIDR_CORTEX_A57,
362 #ifdef CONFIG_ARM64_ERRATUM_834220
364 /* Cortex-A57 r0p0 - r1p2 */
365 .desc = "ARM erratum 834220",
366 .capability = ARM64_WORKAROUND_834220,
367 ERRATA_MIDR_RANGE(MIDR_CORTEX_A57,
372 #ifdef CONFIG_ARM64_ERRATUM_843419
374 .desc = "ARM erratum 843419",
375 .capability = ARM64_WORKAROUND_843419,
376 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
377 .matches = cpucap_multi_entry_cap_matches,
378 .match_list = erratum_843419_list,
381 #ifdef CONFIG_ARM64_ERRATUM_845719
383 .desc = "ARM erratum 845719",
384 .capability = ARM64_WORKAROUND_845719,
385 ERRATA_MIDR_RANGE_LIST(erratum_845719_list),
388 #ifdef CONFIG_CAVIUM_ERRATUM_23154
390 /* Cavium ThunderX, pass 1.x */
391 .desc = "Cavium erratum 23154",
392 .capability = ARM64_WORKAROUND_CAVIUM_23154,
393 ERRATA_MIDR_REV_RANGE(MIDR_THUNDERX, 0, 0, 1),
396 #ifdef CONFIG_CAVIUM_ERRATUM_27456
398 .desc = "Cavium erratum 27456",
399 .capability = ARM64_WORKAROUND_CAVIUM_27456,
400 ERRATA_MIDR_RANGE_LIST(cavium_erratum_27456_cpus),
403 #ifdef CONFIG_CAVIUM_ERRATUM_30115
405 .desc = "Cavium erratum 30115",
406 .capability = ARM64_WORKAROUND_CAVIUM_30115,
407 ERRATA_MIDR_RANGE_LIST(cavium_erratum_30115_cpus),
411 .desc = "Mismatched cache type (CTR_EL0)",
412 .capability = ARM64_MISMATCHED_CACHE_TYPE,
413 .matches = has_mismatched_cache_type,
414 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
415 .cpu_enable = cpu_enable_trap_ctr_access,
417 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003
419 .desc = "Qualcomm Technologies Falkor/Kryo erratum 1003",
420 .capability = ARM64_WORKAROUND_QCOM_FALKOR_E1003,
421 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
422 .matches = cpucap_multi_entry_cap_matches,
423 .match_list = qcom_erratum_1003_list,
426 #ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI
428 .desc = "Qualcomm erratum 1009, or ARM erratum 1286807",
429 .capability = ARM64_WORKAROUND_REPEAT_TLBI,
430 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
431 .matches = cpucap_multi_entry_cap_matches,
432 .match_list = arm64_repeat_tlbi_list,
435 #ifdef CONFIG_ARM64_ERRATUM_858921
437 /* Cortex-A73 all versions */
438 .desc = "ARM erratum 858921",
439 .capability = ARM64_WORKAROUND_858921,
440 ERRATA_MIDR_ALL_VERSIONS(MIDR_CORTEX_A73),
444 .desc = "Spectre-v2",
445 .capability = ARM64_SPECTRE_V2,
446 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
447 .matches = has_spectre_v2,
448 .cpu_enable = spectre_v2_enable_mitigation,
450 #ifdef CONFIG_RANDOMIZE_BASE
452 /* Must come after the Spectre-v2 entry */
453 .desc = "Spectre-v3a",
454 .capability = ARM64_SPECTRE_V3A,
455 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
456 .matches = has_spectre_v3a,
457 .cpu_enable = spectre_v3a_enable_mitigation,
461 .desc = "Spectre-v4",
462 .capability = ARM64_SPECTRE_V4,
463 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
464 .matches = has_spectre_v4,
465 .cpu_enable = spectre_v4_enable_mitigation,
467 #ifdef CONFIG_ARM64_ERRATUM_1418040
469 .desc = "ARM erratum 1418040",
470 .capability = ARM64_WORKAROUND_1418040,
471 ERRATA_MIDR_RANGE_LIST(erratum_1418040_list),
473 * We need to allow affected CPUs to come in late, but
474 * also need the non-affected CPUs to be able to come
475 * in at any point in time. Wonderful.
477 .type = ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE,
480 #ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT
482 .desc = "ARM errata 1165522, 1319367, or 1530923",
483 .capability = ARM64_WORKAROUND_SPECULATIVE_AT,
484 ERRATA_MIDR_RANGE_LIST(erratum_speculative_at_list),
487 #ifdef CONFIG_ARM64_ERRATUM_1463225
489 .desc = "ARM erratum 1463225",
490 .capability = ARM64_WORKAROUND_1463225,
491 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
492 .matches = has_cortex_a76_erratum_1463225,
493 .midr_range_list = erratum_1463225,
496 #ifdef CONFIG_CAVIUM_TX2_ERRATUM_219
498 .desc = "Cavium ThunderX2 erratum 219 (KVM guest sysreg trapping)",
499 .capability = ARM64_WORKAROUND_CAVIUM_TX2_219_TVM,
500 ERRATA_MIDR_RANGE_LIST(tx2_family_cpus),
501 .matches = needs_tx2_tvm_workaround,
504 .desc = "Cavium ThunderX2 erratum 219 (PRFM removal)",
505 .capability = ARM64_WORKAROUND_CAVIUM_TX2_219_PRFM,
506 ERRATA_MIDR_RANGE_LIST(tx2_family_cpus),
509 #ifdef CONFIG_ARM64_ERRATUM_1542419
511 /* we depend on the firmware portion for correctness */
512 .desc = "ARM erratum 1542419 (kernel portion)",
513 .capability = ARM64_WORKAROUND_1542419,
514 .type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
515 .matches = has_neoverse_n1_erratum_1542419,
516 .cpu_enable = cpu_enable_trap_ctr_access,
519 #ifdef CONFIG_ARM64_ERRATUM_1508412
521 /* we depend on the firmware portion for correctness */
522 .desc = "ARM erratum 1508412 (kernel portion)",
523 .capability = ARM64_WORKAROUND_1508412,
524 ERRATA_MIDR_RANGE(MIDR_CORTEX_A77,
529 #ifdef CONFIG_NVIDIA_CARMEL_CNP_ERRATUM
532 .desc = "NVIDIA Carmel CNP erratum",
533 .capability = ARM64_WORKAROUND_NVIDIA_CARMEL_CNP,
534 ERRATA_MIDR_ALL_VERSIONS(MIDR_NVIDIA_CARMEL),