arch/arm64/kernel/cpu_errata.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0-only
 /*
  * Contains CPU specific errata definitions
  *
  * Copyright (C) 2014 ARM Ltd.
  */

 #include <linux/arm-smccc.h>
 #include <linux/types.h>
 #include <linux/cpu.h>
 #include <asm/cpu.h>
 #include <asm/cputype.h>
 #include <asm/cpufeature.h>
 #include <asm/kvm_asm.h>
 #include <asm/smp_plat.h>

 static bool __maybe_unused
 is_affected_midr_range(const struct arm64_cpu_capabilities *entry, int scope)
 {
 	const struct arm64_midr_revidr *fix;
 	u32 midr = read_cpuid_id(), revidr;

 	WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
 	if (!is_midr_in_range(midr, &entry->midr_range))
 		return false;

 	midr &= MIDR_REVISION_MASK | MIDR_VARIANT_MASK;
 	revidr = read_cpuid(REVIDR_EL1);
 	for (fix = entry->fixed_revs; fix && fix->revidr_mask; fix++)
 		if (midr == fix->midr_rv && (revidr & fix->revidr_mask))
 			return false;

 	return true;
 }

 static bool __maybe_unused
 is_affected_midr_range_list(const struct arm64_cpu_capabilities *entry,
 			    int scope)
 {
 	WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
 	return is_midr_in_range_list(read_cpuid_id(), entry->midr_range_list);
 }

 static bool __maybe_unused
 is_kryo_midr(const struct arm64_cpu_capabilities *entry, int scope)
 {
 	u32 model;

 	WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());

 	model = read_cpuid_id();
 	model &= MIDR_IMPLEMENTOR_MASK | (0xf00 << MIDR_PARTNUM_SHIFT) |
 		 MIDR_ARCHITECTURE_MASK;

 	return model == entry->midr_range.model;
 }

 static bool
 has_mismatched_cache_type(const struct arm64_cpu_capabilities *entry,
 			  int scope)
 {
 	u64 mask = arm64_ftr_reg_ctrel0.strict_mask;
 	u64 sys = arm64_ftr_reg_ctrel0.sys_val & mask;
 	u64 ctr_raw, ctr_real;

 	WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());

 	/*
 	 * We want to make sure that all the CPUs in the system expose
 	 * a consistent CTR_EL0 to make sure that applications behaves
 	 * correctly with migration.
 	 *
 	 * If a CPU has CTR_EL0.IDC but does not advertise it via CTR_EL0 :
 	 *
 	 * 1) It is safe if the system doesn't support IDC, as CPU anyway
 	 *    reports IDC = 0, consistent with the rest.
 	 *
 	 * 2) If the system has IDC, it is still safe as we trap CTR_EL0
 	 *    access on this CPU via the ARM64_HAS_CACHE_IDC capability.
 	 *
 	 * So, we need to make sure either the raw CTR_EL0 or the effective
 	 * CTR_EL0 matches the system's copy to allow a secondary CPU to boot.
 	 */
 	ctr_raw = read_cpuid_cachetype() & mask;
 	ctr_real = read_cpuid_effective_cachetype() & mask;

 	return (ctr_real != sys) && (ctr_raw != sys);
 }

 static void
 cpu_enable_trap_ctr_access(const struct arm64_cpu_capabilities *cap)
 {
 	u64 mask = arm64_ftr_reg_ctrel0.strict_mask;
 	bool enable_uct_trap = false;

 	/* Trap CTR_EL0 access on this CPU, only if it has a mismatch */
 	if ((read_cpuid_cachetype() & mask) !=
 	    (arm64_ftr_reg_ctrel0.sys_val & mask))
 		enable_uct_trap = true;

 	/* ... or if the system is affected by an erratum */
 	if (cap->capability == ARM64_WORKAROUND_1542419)
 		enable_uct_trap = true;

 	if (enable_uct_trap)
 		sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCT, 0);
 }

 #ifdef CONFIG_ARM64_ERRATUM_1463225
 DEFINE_PER_CPU(int, __in_cortex_a76_erratum_1463225_wa);

 static bool
 has_cortex_a76_erratum_1463225(const struct arm64_cpu_capabilities *entry,
 			       int scope)
 {
 	return is_affected_midr_range_list(entry, scope) && is_kernel_in_hyp_mode();
 }
 #endif

 static void __maybe_unused
 cpu_enable_cache_maint_trap(const struct arm64_cpu_capabilities *__unused)
 {
 	sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCI, 0);
 }

 #define CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max)	\
 	.matches = is_affected_midr_range,			\
 	.midr_range = MIDR_RANGE(model, v_min, r_min, v_max, r_max)

 #define CAP_MIDR_ALL_VERSIONS(model)					\
 	.matches = is_affected_midr_range,				\
 	.midr_range = MIDR_ALL_VERSIONS(model)

 #define MIDR_FIXED(rev, revidr_mask) \
 	.fixed_revs = (struct arm64_midr_revidr[]){{ (rev), (revidr_mask) }, {}}

 #define ERRATA_MIDR_RANGE(model, v_min, r_min, v_max, r_max)		\
 	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,				\
 	CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max)

 #define CAP_MIDR_RANGE_LIST(list)				\
 	.matches = is_affected_midr_range_list,			\
 	.midr_range_list = list

 /* Errata affecting a range of revisions of  given model variant */
 #define ERRATA_MIDR_REV_RANGE(m, var, r_min, r_max)	 \
 	ERRATA_MIDR_RANGE(m, var, r_min, var, r_max)

 /* Errata affecting a single variant/revision of a model */
 #define ERRATA_MIDR_REV(model, var, rev)	\
 	ERRATA_MIDR_RANGE(model, var, rev, var, rev)

 /* Errata affecting all variants/revisions of a given a model */
 #define ERRATA_MIDR_ALL_VERSIONS(model)				\
 	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,			\
 	CAP_MIDR_ALL_VERSIONS(model)

 /* Errata affecting a list of midr ranges, with same work around */
 #define ERRATA_MIDR_RANGE_LIST(midr_list)			\
 	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,			\
 	CAP_MIDR_RANGE_LIST(midr_list)

 static const __maybe_unused struct midr_range tx2_family_cpus[] = {
 	MIDR_ALL_VERSIONS(MIDR_BRCM_VULCAN),
 	MIDR_ALL_VERSIONS(MIDR_CAVIUM_THUNDERX2),
 	{},
 };

 static bool __maybe_unused
 needs_tx2_tvm_workaround(const struct arm64_cpu_capabilities *entry,
 			 int scope)
 {
 	int i;

 	if (!is_affected_midr_range_list(entry, scope) ||
 	    !is_hyp_mode_available())
 		return false;

 	for_each_possible_cpu(i) {
 		if (MPIDR_AFFINITY_LEVEL(cpu_logical_map(i), 0) != 0)
 			return true;
 	}

 	return false;
 }

 static bool __maybe_unused
 has_neoverse_n1_erratum_1542419(const struct arm64_cpu_capabilities *entry,
 				int scope)
 {
 	u32 midr = read_cpuid_id();
 	bool has_dic = read_cpuid_cachetype() & BIT(CTR_DIC_SHIFT);
 	const struct midr_range range = MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N1);

 	WARN_ON(scope != SCOPE_LOCAL_CPU || preemptible());
 	return is_midr_in_range(midr, &range) && has_dic;
 }

 #ifdef CONFIG_RANDOMIZE_BASE

 static const struct midr_range ca57_a72[] = {
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_A57),
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_A72),
 	{},
 };

 #endif

 #ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI
 static const struct arm64_cpu_capabilities arm64_repeat_tlbi_list[] = {
 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1009
 	{
 		ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0)
 	},
 	{
 		.midr_range.model = MIDR_QCOM_KRYO,
 		.matches = is_kryo_midr,
 	},
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_1286807
 	{
 		ERRATA_MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 0),
 	},
 #endif
 	{},
 };
 #endif

 #ifdef CONFIG_CAVIUM_ERRATUM_27456
 const struct midr_range cavium_erratum_27456_cpus[] = {
 	/* Cavium ThunderX, T88 pass 1.x - 2.1 */
 	MIDR_RANGE(MIDR_THUNDERX, 0, 0, 1, 1),
 	/* Cavium ThunderX, T81 pass 1.0 */
 	MIDR_REV(MIDR_THUNDERX_81XX, 0, 0),
 	{},
 };
 #endif

 #ifdef CONFIG_CAVIUM_ERRATUM_30115
 static const struct midr_range cavium_erratum_30115_cpus[] = {
 	/* Cavium ThunderX, T88 pass 1.x - 2.2 */
 	MIDR_RANGE(MIDR_THUNDERX, 0, 0, 1, 2),
 	/* Cavium ThunderX, T81 pass 1.0 - 1.2 */
 	MIDR_REV_RANGE(MIDR_THUNDERX_81XX, 0, 0, 2),
 	/* Cavium ThunderX, T83 pass 1.0 */
 	MIDR_REV(MIDR_THUNDERX_83XX, 0, 0),
 	{},
 };
 #endif

 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003
 static const struct arm64_cpu_capabilities qcom_erratum_1003_list[] = {
 	{
 		ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0),
 	},
 	{
 		.midr_range.model = MIDR_QCOM_KRYO,
 		.matches = is_kryo_midr,
 	},
 	{},
 };
 #endif

 #ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE
 static const struct midr_range workaround_clean_cache[] = {
 #if	defined(CONFIG_ARM64_ERRATUM_826319) || \
 	defined(CONFIG_ARM64_ERRATUM_827319) || \
 	defined(CONFIG_ARM64_ERRATUM_824069)
 	/* Cortex-A53 r0p[012]: ARM errata 826319, 827319, 824069 */
 	MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 2),
 #endif
 #ifdef	CONFIG_ARM64_ERRATUM_819472
 	/* Cortex-A53 r0p[01] : ARM errata 819472 */
 	MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 1),
 #endif
 	{},
 };
 #endif

 #ifdef CONFIG_ARM64_ERRATUM_1418040
 /*
  * - 1188873 affects r0p0 to r2p0
  * - 1418040 affects r0p0 to r3p1
  */
 static const struct midr_range erratum_1418040_list[] = {
 	/* Cortex-A76 r0p0 to r3p1 */
 	MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 1),
 	/* Neoverse-N1 r0p0 to r3p1 */
 	MIDR_RANGE(MIDR_NEOVERSE_N1, 0, 0, 3, 1),
 	/* Kryo4xx Gold (rcpe to rfpf) => (r0p0 to r3p1) */
 	MIDR_RANGE(MIDR_QCOM_KRYO_4XX_GOLD, 0xc, 0xe, 0xf, 0xf),
 	{},
 };
 #endif

 #ifdef CONFIG_ARM64_ERRATUM_845719
 static const struct midr_range erratum_845719_list[] = {
 	/* Cortex-A53 r0p[01234] */
 	MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4),
 	/* Brahma-B53 r0p[0] */
 	MIDR_REV(MIDR_BRAHMA_B53, 0, 0),
 	/* Kryo2XX Silver rAp4 */
 	MIDR_REV(MIDR_QCOM_KRYO_2XX_SILVER, 0xa, 0x4),
 	{},
 };
 #endif

 #ifdef CONFIG_ARM64_ERRATUM_843419
 static const struct arm64_cpu_capabilities erratum_843419_list[] = {
 	{
 		/* Cortex-A53 r0p[01234] */
 		.matches = is_affected_midr_range,
 		ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4),
 		MIDR_FIXED(0x4, BIT(8)),
 	},
 	{
 		/* Brahma-B53 r0p[0] */
 		.matches = is_affected_midr_range,
 		ERRATA_MIDR_REV(MIDR_BRAHMA_B53, 0, 0),
 	},
 	{},
 };
 #endif

 #ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT
 static const struct midr_range erratum_speculative_at_list[] = {
 #ifdef CONFIG_ARM64_ERRATUM_1165522
 	/* Cortex A76 r0p0 to r2p0 */
 	MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 2, 0),
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_1319367
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_A57),
 	MIDR_ALL_VERSIONS(MIDR_CORTEX_A72),
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_1530923
 	/* Cortex A55 r0p0 to r2p0 */
 	MIDR_RANGE(MIDR_CORTEX_A55, 0, 0, 2, 0),
 	/* Kryo4xx Silver (rdpe => r1p0) */
 	MIDR_REV(MIDR_QCOM_KRYO_4XX_SILVER, 0xd, 0xe),
 #endif
 	{},
 };
 #endif

 #ifdef CONFIG_ARM64_ERRATUM_1463225
 static const struct midr_range erratum_1463225[] = {
 	/* Cortex-A76 r0p0 - r3p1 */
 	MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 1),
 	/* Kryo4xx Gold (rcpe to rfpf) => (r0p0 to r3p1) */
 	MIDR_RANGE(MIDR_QCOM_KRYO_4XX_GOLD, 0xc, 0xe, 0xf, 0xf),
 	{},
 };
 #endif

 const struct arm64_cpu_capabilities arm64_errata[] = {
 #ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE
 	{
 		.desc = "ARM errata 826319, 827319, 824069, or 819472",
 		.capability = ARM64_WORKAROUND_CLEAN_CACHE,
 		ERRATA_MIDR_RANGE_LIST(workaround_clean_cache),
 		.cpu_enable = cpu_enable_cache_maint_trap,
 	},
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_832075
 	{
 	/* Cortex-A57 r0p0 - r1p2 */
 		.desc = "ARM erratum 832075",
 		.capability = ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE,
 		ERRATA_MIDR_RANGE(MIDR_CORTEX_A57,
 				  0, 0,
 				  1, 2),
 	},
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_834220
 	{
 	/* Cortex-A57 r0p0 - r1p2 */
 		.desc = "ARM erratum 834220",
 		.capability = ARM64_WORKAROUND_834220,
 		ERRATA_MIDR_RANGE(MIDR_CORTEX_A57,
 				  0, 0,
 				  1, 2),
 	},
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_843419
 	{
 		.desc = "ARM erratum 843419",
 		.capability = ARM64_WORKAROUND_843419,
 		.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
 		.matches = cpucap_multi_entry_cap_matches,
 		.match_list = erratum_843419_list,
 	},
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_845719
 	{
 		.desc = "ARM erratum 845719",
 		.capability = ARM64_WORKAROUND_845719,
 		ERRATA_MIDR_RANGE_LIST(erratum_845719_list),
 	},
 #endif
 #ifdef CONFIG_CAVIUM_ERRATUM_23154
 	{
 	/* Cavium ThunderX, pass 1.x */
 		.desc = "Cavium erratum 23154",
 		.capability = ARM64_WORKAROUND_CAVIUM_23154,
 		ERRATA_MIDR_REV_RANGE(MIDR_THUNDERX, 0, 0, 1),
 	},
 #endif
 #ifdef CONFIG_CAVIUM_ERRATUM_27456
 	{
 		.desc = "Cavium erratum 27456",
 		.capability = ARM64_WORKAROUND_CAVIUM_27456,
 		ERRATA_MIDR_RANGE_LIST(cavium_erratum_27456_cpus),
 	},
 #endif
 #ifdef CONFIG_CAVIUM_ERRATUM_30115
 	{
 		.desc = "Cavium erratum 30115",
 		.capability = ARM64_WORKAROUND_CAVIUM_30115,
 		ERRATA_MIDR_RANGE_LIST(cavium_erratum_30115_cpus),
 	},
 #endif
 	{
 		.desc = "Mismatched cache type (CTR_EL0)",
 		.capability = ARM64_MISMATCHED_CACHE_TYPE,
 		.matches = has_mismatched_cache_type,
 		.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
 		.cpu_enable = cpu_enable_trap_ctr_access,
 	},
 #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003
 	{
 		.desc = "Qualcomm Technologies Falkor/Kryo erratum 1003",
 		.capability = ARM64_WORKAROUND_QCOM_FALKOR_E1003,
 		.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
 		.matches = cpucap_multi_entry_cap_matches,
 		.match_list = qcom_erratum_1003_list,
 	},
 #endif
 #ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI
 	{
 		.desc = "Qualcomm erratum 1009, or ARM erratum 1286807",
 		.capability = ARM64_WORKAROUND_REPEAT_TLBI,
 		.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
 		.matches = cpucap_multi_entry_cap_matches,
 		.match_list = arm64_repeat_tlbi_list,
 	},
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_858921
 	{
 	/* Cortex-A73 all versions */
 		.desc = "ARM erratum 858921",
 		.capability = ARM64_WORKAROUND_858921,
 		ERRATA_MIDR_ALL_VERSIONS(MIDR_CORTEX_A73),
 	},
 #endif
 	{
 		.desc = "Spectre-v2",
 		.capability = ARM64_SPECTRE_V2,
 		.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
 		.matches = has_spectre_v2,
 		.cpu_enable = spectre_v2_enable_mitigation,
 	},
 #ifdef CONFIG_RANDOMIZE_BASE
 	{
 		.desc = "EL2 vector hardening",
 		.capability = ARM64_HARDEN_EL2_VECTORS,
 		ERRATA_MIDR_RANGE_LIST(ca57_a72),
 	},
 #endif
 	{
 		.desc = "Spectre-v4",
 		.capability = ARM64_SPECTRE_V4,
 		.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
 		.matches = has_spectre_v4,
 		.cpu_enable = spectre_v4_enable_mitigation,
 	},
 #ifdef CONFIG_ARM64_ERRATUM_1418040
 	{
 		.desc = "ARM erratum 1418040",
 		.capability = ARM64_WORKAROUND_1418040,
 		ERRATA_MIDR_RANGE_LIST(erratum_1418040_list),
 		/*
 		 * We need to allow affected CPUs to come in late, but
 		 * also need the non-affected CPUs to be able to come
 		 * in at any point in time. Wonderful.
 		 */
 		.type = ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE,
 	},
 #endif
 #ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT
 	{
 		.desc = "ARM errata 1165522, 1319367, or 1530923",
 		.capability = ARM64_WORKAROUND_SPECULATIVE_AT,
 		ERRATA_MIDR_RANGE_LIST(erratum_speculative_at_list),
 	},
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_1463225
 	{
 		.desc = "ARM erratum 1463225",
 		.capability = ARM64_WORKAROUND_1463225,
 		.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
 		.matches = has_cortex_a76_erratum_1463225,
 		.midr_range_list = erratum_1463225,
 	},
 #endif
 #ifdef CONFIG_CAVIUM_TX2_ERRATUM_219
 	{
 		.desc = "Cavium ThunderX2 erratum 219 (KVM guest sysreg trapping)",
 		.capability = ARM64_WORKAROUND_CAVIUM_TX2_219_TVM,
 		ERRATA_MIDR_RANGE_LIST(tx2_family_cpus),
 		.matches = needs_tx2_tvm_workaround,
 	},
 	{
 		.desc = "Cavium ThunderX2 erratum 219 (PRFM removal)",
 		.capability = ARM64_WORKAROUND_CAVIUM_TX2_219_PRFM,
 		ERRATA_MIDR_RANGE_LIST(tx2_family_cpus),
 	},
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_1542419
 	{
 		/* we depend on the firmware portion for correctness */
 		.desc = "ARM erratum 1542419 (kernel portion)",
 		.capability = ARM64_WORKAROUND_1542419,
 		.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
 		.matches = has_neoverse_n1_erratum_1542419,
 		.cpu_enable = cpu_enable_trap_ctr_access,
 	},
 #endif
 #ifdef CONFIG_ARM64_ERRATUM_1508412
 	{
 		/* we depend on the firmware portion for correctness */
 		.desc = "ARM erratum 1508412 (kernel portion)",
 		.capability = ARM64_WORKAROUND_1508412,
 		ERRATA_MIDR_RANGE(MIDR_CORTEX_A77,
 				  0, 0,
 				  1, 0),
 	},
 #endif
 	{
 	}
 };
	// SPDX-License-Identifier: GPL-2.0-only
	/*
	* Contains CPU specific errata definitions
	*
	* Copyright (C) 2014 ARM Ltd.
	*/

	#include <linux/arm-smccc.h>
	#include <linux/types.h>
	#include <linux/cpu.h>
	#include <asm/cpu.h>
	#include <asm/cputype.h>
	#include <asm/cpufeature.h>
	#include <asm/kvm_asm.h>
	#include <asm/smp_plat.h>

	static bool __maybe_unused
	is_affected_midr_range(const struct arm64_cpu_capabilities *entry, int scope)
	{
	const struct arm64_midr_revidr *fix;
	u32 midr = read_cpuid_id(), revidr;

	WARN_ON(scope != SCOPE_LOCAL_CPU \|\| preemptible());
	if (!is_midr_in_range(midr, &entry->midr_range))
	return false;

	midr &= MIDR_REVISION_MASK \| MIDR_VARIANT_MASK;
	revidr = read_cpuid(REVIDR_EL1);
	for (fix = entry->fixed_revs; fix && fix->revidr_mask; fix++)
	if (midr == fix->midr_rv && (revidr & fix->revidr_mask))
	return false;

	return true;
	}

	static bool __maybe_unused
	is_affected_midr_range_list(const struct arm64_cpu_capabilities *entry,
	int scope)
	{
	WARN_ON(scope != SCOPE_LOCAL_CPU \|\| preemptible());
	return is_midr_in_range_list(read_cpuid_id(), entry->midr_range_list);
	}

	static bool __maybe_unused
	is_kryo_midr(const struct arm64_cpu_capabilities *entry, int scope)
	{
	u32 model;

	WARN_ON(scope != SCOPE_LOCAL_CPU \|\| preemptible());

	model = read_cpuid_id();
	model &= MIDR_IMPLEMENTOR_MASK \| (0xf00 << MIDR_PARTNUM_SHIFT) \|
	MIDR_ARCHITECTURE_MASK;

	return model == entry->midr_range.model;
	}

	static bool
	has_mismatched_cache_type(const struct arm64_cpu_capabilities *entry,
	int scope)
	{
	u64 mask = arm64_ftr_reg_ctrel0.strict_mask;
	u64 sys = arm64_ftr_reg_ctrel0.sys_val & mask;
	u64 ctr_raw, ctr_real;

	WARN_ON(scope != SCOPE_LOCAL_CPU \|\| preemptible());

	/*
	* We want to make sure that all the CPUs in the system expose
	* a consistent CTR_EL0 to make sure that applications behaves
	* correctly with migration.
	*
	* If a CPU has CTR_EL0.IDC but does not advertise it via CTR_EL0 :
	*
	* 1) It is safe if the system doesn't support IDC, as CPU anyway
	* reports IDC = 0, consistent with the rest.
	*
	* 2) If the system has IDC, it is still safe as we trap CTR_EL0
	* access on this CPU via the ARM64_HAS_CACHE_IDC capability.
	*
	* So, we need to make sure either the raw CTR_EL0 or the effective
	* CTR_EL0 matches the system's copy to allow a secondary CPU to boot.
	*/
	ctr_raw = read_cpuid_cachetype() & mask;
	ctr_real = read_cpuid_effective_cachetype() & mask;

	return (ctr_real != sys) && (ctr_raw != sys);
	}

	static void
	cpu_enable_trap_ctr_access(const struct arm64_cpu_capabilities *cap)
	{
	u64 mask = arm64_ftr_reg_ctrel0.strict_mask;
	bool enable_uct_trap = false;

	/* Trap CTR_EL0 access on this CPU, only if it has a mismatch */
	if ((read_cpuid_cachetype() & mask) !=
	(arm64_ftr_reg_ctrel0.sys_val & mask))
	enable_uct_trap = true;

	/* ... or if the system is affected by an erratum */
	if (cap->capability == ARM64_WORKAROUND_1542419)
	enable_uct_trap = true;

	if (enable_uct_trap)
	sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCT, 0);
	}

	#ifdef CONFIG_ARM64_ERRATUM_1463225
	DEFINE_PER_CPU(int, __in_cortex_a76_erratum_1463225_wa);

	static bool
	has_cortex_a76_erratum_1463225(const struct arm64_cpu_capabilities *entry,
	int scope)
	{
	return is_affected_midr_range_list(entry, scope) && is_kernel_in_hyp_mode();
	}
	#endif

	static void __maybe_unused
	cpu_enable_cache_maint_trap(const struct arm64_cpu_capabilities *__unused)
	{
	sysreg_clear_set(sctlr_el1, SCTLR_EL1_UCI, 0);
	}

	#define CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max) \
	.matches = is_affected_midr_range, \
	.midr_range = MIDR_RANGE(model, v_min, r_min, v_max, r_max)

	#define CAP_MIDR_ALL_VERSIONS(model) \
	.matches = is_affected_midr_range, \
	.midr_range = MIDR_ALL_VERSIONS(model)

	#define MIDR_FIXED(rev, revidr_mask) \
	.fixed_revs = (struct arm64_midr_revidr[]){{ (rev), (revidr_mask) }, {}}

	#define ERRATA_MIDR_RANGE(model, v_min, r_min, v_max, r_max) \
	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, \
	CAP_MIDR_RANGE(model, v_min, r_min, v_max, r_max)

	#define CAP_MIDR_RANGE_LIST(list) \
	.matches = is_affected_midr_range_list, \
	.midr_range_list = list

	/* Errata affecting a range of revisions of given model variant */
	#define ERRATA_MIDR_REV_RANGE(m, var, r_min, r_max) \
	ERRATA_MIDR_RANGE(m, var, r_min, var, r_max)

	/* Errata affecting a single variant/revision of a model */
	#define ERRATA_MIDR_REV(model, var, rev) \
	ERRATA_MIDR_RANGE(model, var, rev, var, rev)

	/* Errata affecting all variants/revisions of a given a model */
	#define ERRATA_MIDR_ALL_VERSIONS(model) \
	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, \
	CAP_MIDR_ALL_VERSIONS(model)

	/* Errata affecting a list of midr ranges, with same work around */
	#define ERRATA_MIDR_RANGE_LIST(midr_list) \
	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM, \
	CAP_MIDR_RANGE_LIST(midr_list)

	static const __maybe_unused struct midr_range tx2_family_cpus[] = {
	MIDR_ALL_VERSIONS(MIDR_BRCM_VULCAN),
	MIDR_ALL_VERSIONS(MIDR_CAVIUM_THUNDERX2),
	{},
	};

	static bool __maybe_unused
	needs_tx2_tvm_workaround(const struct arm64_cpu_capabilities *entry,
	int scope)
	{
	int i;

	if (!is_affected_midr_range_list(entry, scope) \|\|
	!is_hyp_mode_available())
	return false;

	for_each_possible_cpu(i) {
	if (MPIDR_AFFINITY_LEVEL(cpu_logical_map(i), 0) != 0)
	return true;
	}

	return false;
	}

	static bool __maybe_unused
	has_neoverse_n1_erratum_1542419(const struct arm64_cpu_capabilities *entry,
	int scope)
	{
	u32 midr = read_cpuid_id();
	bool has_dic = read_cpuid_cachetype() & BIT(CTR_DIC_SHIFT);
	const struct midr_range range = MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N1);

	WARN_ON(scope != SCOPE_LOCAL_CPU \|\| preemptible());
	return is_midr_in_range(midr, &range) && has_dic;
	}

	#ifdef CONFIG_RANDOMIZE_BASE

	static const struct midr_range ca57_a72[] = {
	MIDR_ALL_VERSIONS(MIDR_CORTEX_A57),
	MIDR_ALL_VERSIONS(MIDR_CORTEX_A72),
	{},
	};

	#endif

	#ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI
	static const struct arm64_cpu_capabilities arm64_repeat_tlbi_list[] = {
	#ifdef CONFIG_QCOM_FALKOR_ERRATUM_1009
	{
	ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0)
	},
	{
	.midr_range.model = MIDR_QCOM_KRYO,
	.matches = is_kryo_midr,
	},
	#endif
	#ifdef CONFIG_ARM64_ERRATUM_1286807
	{
	ERRATA_MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 0),
	},
	#endif
	{},
	};
	#endif

	#ifdef CONFIG_CAVIUM_ERRATUM_27456
	const struct midr_range cavium_erratum_27456_cpus[] = {
	/* Cavium ThunderX, T88 pass 1.x - 2.1 */
	MIDR_RANGE(MIDR_THUNDERX, 0, 0, 1, 1),
	/* Cavium ThunderX, T81 pass 1.0 */
	MIDR_REV(MIDR_THUNDERX_81XX, 0, 0),
	{},
	};
	#endif

	#ifdef CONFIG_CAVIUM_ERRATUM_30115
	static const struct midr_range cavium_erratum_30115_cpus[] = {
	/* Cavium ThunderX, T88 pass 1.x - 2.2 */
	MIDR_RANGE(MIDR_THUNDERX, 0, 0, 1, 2),
	/* Cavium ThunderX, T81 pass 1.0 - 1.2 */
	MIDR_REV_RANGE(MIDR_THUNDERX_81XX, 0, 0, 2),
	/* Cavium ThunderX, T83 pass 1.0 */
	MIDR_REV(MIDR_THUNDERX_83XX, 0, 0),
	{},
	};
	#endif

	#ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003
	static const struct arm64_cpu_capabilities qcom_erratum_1003_list[] = {
	{
	ERRATA_MIDR_REV(MIDR_QCOM_FALKOR_V1, 0, 0),
	},
	{
	.midr_range.model = MIDR_QCOM_KRYO,
	.matches = is_kryo_midr,
	},
	{},
	};
	#endif

	#ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE
	static const struct midr_range workaround_clean_cache[] = {
	#if defined(CONFIG_ARM64_ERRATUM_826319) \|\| \
	defined(CONFIG_ARM64_ERRATUM_827319) \|\| \
	defined(CONFIG_ARM64_ERRATUM_824069)
	/* Cortex-A53 r0p[012]: ARM errata 826319, 827319, 824069 */
	MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 2),
	#endif
	#ifdef CONFIG_ARM64_ERRATUM_819472
	/* Cortex-A53 r0p[01] : ARM errata 819472 */
	MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 1),
	#endif
	{},
	};
	#endif

	#ifdef CONFIG_ARM64_ERRATUM_1418040
	/*
	* - 1188873 affects r0p0 to r2p0
	* - 1418040 affects r0p0 to r3p1
	*/
	static const struct midr_range erratum_1418040_list[] = {
	/* Cortex-A76 r0p0 to r3p1 */
	MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 1),
	/* Neoverse-N1 r0p0 to r3p1 */
	MIDR_RANGE(MIDR_NEOVERSE_N1, 0, 0, 3, 1),
	/* Kryo4xx Gold (rcpe to rfpf) => (r0p0 to r3p1) */
	MIDR_RANGE(MIDR_QCOM_KRYO_4XX_GOLD, 0xc, 0xe, 0xf, 0xf),
	{},
	};
	#endif

	#ifdef CONFIG_ARM64_ERRATUM_845719
	static const struct midr_range erratum_845719_list[] = {
	/* Cortex-A53 r0p[01234] */
	MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4),
	/* Brahma-B53 r0p[0] */
	MIDR_REV(MIDR_BRAHMA_B53, 0, 0),
	/* Kryo2XX Silver rAp4 */
	MIDR_REV(MIDR_QCOM_KRYO_2XX_SILVER, 0xa, 0x4),
	{},
	};
	#endif

	#ifdef CONFIG_ARM64_ERRATUM_843419
	static const struct arm64_cpu_capabilities erratum_843419_list[] = {
	{
	/* Cortex-A53 r0p[01234] */
	.matches = is_affected_midr_range,
	ERRATA_MIDR_REV_RANGE(MIDR_CORTEX_A53, 0, 0, 4),
	MIDR_FIXED(0x4, BIT(8)),
	},
	{
	/* Brahma-B53 r0p[0] */
	.matches = is_affected_midr_range,
	ERRATA_MIDR_REV(MIDR_BRAHMA_B53, 0, 0),
	},
	{},
	};
	#endif

	#ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT
	static const struct midr_range erratum_speculative_at_list[] = {
	#ifdef CONFIG_ARM64_ERRATUM_1165522
	/* Cortex A76 r0p0 to r2p0 */
	MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 2, 0),
	#endif
	#ifdef CONFIG_ARM64_ERRATUM_1319367
	MIDR_ALL_VERSIONS(MIDR_CORTEX_A57),
	MIDR_ALL_VERSIONS(MIDR_CORTEX_A72),
	#endif
	#ifdef CONFIG_ARM64_ERRATUM_1530923
	/* Cortex A55 r0p0 to r2p0 */
	MIDR_RANGE(MIDR_CORTEX_A55, 0, 0, 2, 0),
	/* Kryo4xx Silver (rdpe => r1p0) */
	MIDR_REV(MIDR_QCOM_KRYO_4XX_SILVER, 0xd, 0xe),
	#endif
	{},
	};
	#endif

	#ifdef CONFIG_ARM64_ERRATUM_1463225
	static const struct midr_range erratum_1463225[] = {
	/* Cortex-A76 r0p0 - r3p1 */
	MIDR_RANGE(MIDR_CORTEX_A76, 0, 0, 3, 1),
	/* Kryo4xx Gold (rcpe to rfpf) => (r0p0 to r3p1) */
	MIDR_RANGE(MIDR_QCOM_KRYO_4XX_GOLD, 0xc, 0xe, 0xf, 0xf),
	{},
	};
	#endif

	const struct arm64_cpu_capabilities arm64_errata[] = {
	#ifdef CONFIG_ARM64_WORKAROUND_CLEAN_CACHE
	{
	.desc = "ARM errata 826319, 827319, 824069, or 819472",
	.capability = ARM64_WORKAROUND_CLEAN_CACHE,
	ERRATA_MIDR_RANGE_LIST(workaround_clean_cache),
	.cpu_enable = cpu_enable_cache_maint_trap,
	},
	#endif
	#ifdef CONFIG_ARM64_ERRATUM_832075
	{
	/* Cortex-A57 r0p0 - r1p2 */
	.desc = "ARM erratum 832075",
	.capability = ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE,
	ERRATA_MIDR_RANGE(MIDR_CORTEX_A57,
	0, 0,
	1, 2),
	},
	#endif
	#ifdef CONFIG_ARM64_ERRATUM_834220
	{
	/* Cortex-A57 r0p0 - r1p2 */
	.desc = "ARM erratum 834220",
	.capability = ARM64_WORKAROUND_834220,
	ERRATA_MIDR_RANGE(MIDR_CORTEX_A57,
	0, 0,
	1, 2),
	},
	#endif
	#ifdef CONFIG_ARM64_ERRATUM_843419
	{
	.desc = "ARM erratum 843419",
	.capability = ARM64_WORKAROUND_843419,
	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
	.matches = cpucap_multi_entry_cap_matches,
	.match_list = erratum_843419_list,
	},
	#endif
	#ifdef CONFIG_ARM64_ERRATUM_845719
	{
	.desc = "ARM erratum 845719",
	.capability = ARM64_WORKAROUND_845719,
	ERRATA_MIDR_RANGE_LIST(erratum_845719_list),
	},
	#endif
	#ifdef CONFIG_CAVIUM_ERRATUM_23154
	{
	/* Cavium ThunderX, pass 1.x */
	.desc = "Cavium erratum 23154",
	.capability = ARM64_WORKAROUND_CAVIUM_23154,
	ERRATA_MIDR_REV_RANGE(MIDR_THUNDERX, 0, 0, 1),
	},
	#endif
	#ifdef CONFIG_CAVIUM_ERRATUM_27456
	{
	.desc = "Cavium erratum 27456",
	.capability = ARM64_WORKAROUND_CAVIUM_27456,
	ERRATA_MIDR_RANGE_LIST(cavium_erratum_27456_cpus),
	},
	#endif
	#ifdef CONFIG_CAVIUM_ERRATUM_30115
	{
	.desc = "Cavium erratum 30115",
	.capability = ARM64_WORKAROUND_CAVIUM_30115,
	ERRATA_MIDR_RANGE_LIST(cavium_erratum_30115_cpus),
	},
	#endif
	{
	.desc = "Mismatched cache type (CTR_EL0)",
	.capability = ARM64_MISMATCHED_CACHE_TYPE,
	.matches = has_mismatched_cache_type,
	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
	.cpu_enable = cpu_enable_trap_ctr_access,
	},
	#ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003
	{
	.desc = "Qualcomm Technologies Falkor/Kryo erratum 1003",
	.capability = ARM64_WORKAROUND_QCOM_FALKOR_E1003,
	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
	.matches = cpucap_multi_entry_cap_matches,
	.match_list = qcom_erratum_1003_list,
	},
	#endif
	#ifdef CONFIG_ARM64_WORKAROUND_REPEAT_TLBI
	{
	.desc = "Qualcomm erratum 1009, or ARM erratum 1286807",
	.capability = ARM64_WORKAROUND_REPEAT_TLBI,
	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
	.matches = cpucap_multi_entry_cap_matches,
	.match_list = arm64_repeat_tlbi_list,
	},
	#endif
	#ifdef CONFIG_ARM64_ERRATUM_858921
	{
	/* Cortex-A73 all versions */
	.desc = "ARM erratum 858921",
	.capability = ARM64_WORKAROUND_858921,
	ERRATA_MIDR_ALL_VERSIONS(MIDR_CORTEX_A73),
	},
	#endif
	{
	.desc = "Spectre-v2",
	.capability = ARM64_SPECTRE_V2,
	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
	.matches = has_spectre_v2,
	.cpu_enable = spectre_v2_enable_mitigation,
	},
	#ifdef CONFIG_RANDOMIZE_BASE
	{
	.desc = "EL2 vector hardening",
	.capability = ARM64_HARDEN_EL2_VECTORS,
	ERRATA_MIDR_RANGE_LIST(ca57_a72),
	},
	#endif
	{
	.desc = "Spectre-v4",
	.capability = ARM64_SPECTRE_V4,
	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
	.matches = has_spectre_v4,
	.cpu_enable = spectre_v4_enable_mitigation,
	},
	#ifdef CONFIG_ARM64_ERRATUM_1418040
	{
	.desc = "ARM erratum 1418040",
	.capability = ARM64_WORKAROUND_1418040,
	ERRATA_MIDR_RANGE_LIST(erratum_1418040_list),
	/*
	* We need to allow affected CPUs to come in late, but
	* also need the non-affected CPUs to be able to come
	* in at any point in time. Wonderful.
	*/
	.type = ARM64_CPUCAP_WEAK_LOCAL_CPU_FEATURE,
	},
	#endif
	#ifdef CONFIG_ARM64_WORKAROUND_SPECULATIVE_AT
	{
	.desc = "ARM errata 1165522, 1319367, or 1530923",
	.capability = ARM64_WORKAROUND_SPECULATIVE_AT,
	ERRATA_MIDR_RANGE_LIST(erratum_speculative_at_list),
	},
	#endif
	#ifdef CONFIG_ARM64_ERRATUM_1463225
	{
	.desc = "ARM erratum 1463225",
	.capability = ARM64_WORKAROUND_1463225,
	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
	.matches = has_cortex_a76_erratum_1463225,
	.midr_range_list = erratum_1463225,
	},
	#endif
	#ifdef CONFIG_CAVIUM_TX2_ERRATUM_219
	{
	.desc = "Cavium ThunderX2 erratum 219 (KVM guest sysreg trapping)",
	.capability = ARM64_WORKAROUND_CAVIUM_TX2_219_TVM,
	ERRATA_MIDR_RANGE_LIST(tx2_family_cpus),
	.matches = needs_tx2_tvm_workaround,
	},
	{
	.desc = "Cavium ThunderX2 erratum 219 (PRFM removal)",
	.capability = ARM64_WORKAROUND_CAVIUM_TX2_219_PRFM,
	ERRATA_MIDR_RANGE_LIST(tx2_family_cpus),
	},
	#endif
	#ifdef CONFIG_ARM64_ERRATUM_1542419
	{
	/* we depend on the firmware portion for correctness */
	.desc = "ARM erratum 1542419 (kernel portion)",
	.capability = ARM64_WORKAROUND_1542419,
	.type = ARM64_CPUCAP_LOCAL_CPU_ERRATUM,
	.matches = has_neoverse_n1_erratum_1542419,
	.cpu_enable = cpu_enable_trap_ctr_access,
	},
	#endif
	#ifdef CONFIG_ARM64_ERRATUM_1508412
	{
	/* we depend on the firmware portion for correctness */
	.desc = "ARM erratum 1508412 (kernel portion)",
	.capability = ARM64_WORKAROUND_1508412,
	ERRATA_MIDR_RANGE(MIDR_CORTEX_A77,
	0, 0,
	1, 0),
	},
	#endif
	{
	}
	};