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Commit 5e49d73c authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Will Deacon
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arm64: cpufeature: constify arm64_ftr_bits structures 

The arm64_ftr_bits structures are never modified, so make them read-only.
Reviewed-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent 6a6a4f15
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Inline Side-by-side
Showing with 31 additions and 29 deletions
arch/arm64/include/asm/cpufeature.h
View file @ 5e49d73c
...@@ -72,11 +72,11 @@ struct arm64_ftr_bits { ...@@ -72,11 +72,11 @@ struct arm64_ftr_bits {
* @sys_val Safe value across the CPUs (system view) * @sys_val Safe value across the CPUs (system view)
*/ */
struct arm64_ftr_reg { struct arm64_ftr_reg {
u32 sys_id; u32 sys_id;
const char *name; const char *name;
u64 strict_mask; u64 strict_mask;
u64 sys_val; u64 sys_val;
struct arm64_ftr_bits *ftr_bits; const struct arm64_ftr_bits *ftr_bits;
}; };
/* scope of capability check */ /* scope of capability check */
...@@ -157,7 +157,7 @@ cpuid_feature_extract_unsigned_field(u64 features, int field) ...@@ -157,7 +157,7 @@ cpuid_feature_extract_unsigned_field(u64 features, int field)
return cpuid_feature_extract_unsigned_field_width(features, field, 4); return cpuid_feature_extract_unsigned_field_width(features, field, 4);
} }
static inline u64 arm64_ftr_mask(struct arm64_ftr_bits *ftrp) static inline u64 arm64_ftr_mask(const struct arm64_ftr_bits *ftrp)
{ {
return (u64)GENMASK(ftrp->shift + ftrp->width - 1, ftrp->shift); return (u64)GENMASK(ftrp->shift + ftrp->width - 1, ftrp->shift);
} }
...@@ -170,7 +170,7 @@ cpuid_feature_extract_field(u64 features, int field, bool sign) ...@@ -170,7 +170,7 @@ cpuid_feature_extract_field(u64 features, int field, bool sign)
cpuid_feature_extract_unsigned_field(features, field); cpuid_feature_extract_unsigned_field(features, field);
} }
static inline s64 arm64_ftr_value(struct arm64_ftr_bits *ftrp, u64 val) static inline s64 arm64_ftr_value(const struct arm64_ftr_bits *ftrp, u64 val)
{ {
return (s64)cpuid_feature_extract_field(val, ftrp->shift, ftrp->sign); return (s64)cpuid_feature_extract_field(val, ftrp->shift, ftrp->sign);
} }
......
arch/arm64/kernel/cpufeature.c
View file @ 5e49d73c
...@@ -74,7 +74,7 @@ static bool __maybe_unused ...@@ -74,7 +74,7 @@ static bool __maybe_unused
cpufeature_pan_not_uao(const struct arm64_cpu_capabilities *entry, int __unused); cpufeature_pan_not_uao(const struct arm64_cpu_capabilities *entry, int __unused);
static struct arm64_ftr_bits ftr_id_aa64isar0[] = { static const struct arm64_ftr_bits ftr_id_aa64isar0[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 32, 32, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 32, 32, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64ISAR0_RDM_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64ISAR0_RDM_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 24, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 24, 4, 0),
...@@ -87,7 +87,7 @@ static struct arm64_ftr_bits ftr_id_aa64isar0[] = { ...@@ -87,7 +87,7 @@ static struct arm64_ftr_bits ftr_id_aa64isar0[] = {
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_id_aa64pfr0[] = { static const struct arm64_ftr_bits ftr_id_aa64pfr0[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 32, 32, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 32, 32, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 28, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 28, 4, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64PFR0_GIC_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64PFR0_GIC_SHIFT, 4, 0),
...@@ -101,7 +101,7 @@ static struct arm64_ftr_bits ftr_id_aa64pfr0[] = { ...@@ -101,7 +101,7 @@ static struct arm64_ftr_bits ftr_id_aa64pfr0[] = {
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_id_aa64mmfr0[] = { static const struct arm64_ftr_bits ftr_id_aa64mmfr0[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 32, 32, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 32, 32, 0),
S_ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64MMFR0_TGRAN4_SHIFT, 4, ID_AA64MMFR0_TGRAN4_NI), S_ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64MMFR0_TGRAN4_SHIFT, 4, ID_AA64MMFR0_TGRAN4_NI),
S_ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64MMFR0_TGRAN64_SHIFT, 4, ID_AA64MMFR0_TGRAN64_NI), S_ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64MMFR0_TGRAN64_SHIFT, 4, ID_AA64MMFR0_TGRAN64_NI),
...@@ -119,7 +119,7 @@ static struct arm64_ftr_bits ftr_id_aa64mmfr0[] = { ...@@ -119,7 +119,7 @@ static struct arm64_ftr_bits ftr_id_aa64mmfr0[] = {
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_id_aa64mmfr1[] = { static const struct arm64_ftr_bits ftr_id_aa64mmfr1[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 32, 32, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 32, 32, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR1_PAN_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, ID_AA64MMFR1_PAN_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64MMFR1_LOR_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64MMFR1_LOR_SHIFT, 4, 0),
...@@ -130,7 +130,7 @@ static struct arm64_ftr_bits ftr_id_aa64mmfr1[] = { ...@@ -130,7 +130,7 @@ static struct arm64_ftr_bits ftr_id_aa64mmfr1[] = {
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_id_aa64mmfr2[] = { static const struct arm64_ftr_bits ftr_id_aa64mmfr2[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64MMFR2_LVA_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64MMFR2_LVA_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64MMFR2_IESB_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64MMFR2_IESB_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64MMFR2_LSM_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_AA64MMFR2_LSM_SHIFT, 4, 0),
...@@ -139,7 +139,7 @@ static struct arm64_ftr_bits ftr_id_aa64mmfr2[] = { ...@@ -139,7 +139,7 @@ static struct arm64_ftr_bits ftr_id_aa64mmfr2[] = {
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_ctr[] = { static const struct arm64_ftr_bits ftr_ctr[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 31, 1, 1), /* RAO */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 31, 1, 1), /* RAO */
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 28, 3, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 28, 3, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_HIGHER_SAFE, 24, 4, 0), /* CWG */ ARM64_FTR_BITS(FTR_STRICT, FTR_HIGHER_SAFE, 24, 4, 0), /* CWG */
...@@ -155,7 +155,7 @@ static struct arm64_ftr_bits ftr_ctr[] = { ...@@ -155,7 +155,7 @@ static struct arm64_ftr_bits ftr_ctr[] = {
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_id_mmfr0[] = { static const struct arm64_ftr_bits ftr_id_mmfr0[] = {
S_ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 28, 4, 0xf), /* InnerShr */ S_ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 28, 4, 0xf), /* InnerShr */
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 24, 4, 0), /* FCSE */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 24, 4, 0), /* FCSE */
ARM64_FTR_BITS(FTR_NONSTRICT, FTR_LOWER_SAFE, 20, 4, 0), /* AuxReg */ ARM64_FTR_BITS(FTR_NONSTRICT, FTR_LOWER_SAFE, 20, 4, 0), /* AuxReg */
...@@ -167,7 +167,7 @@ static struct arm64_ftr_bits ftr_id_mmfr0[] = { ...@@ -167,7 +167,7 @@ static struct arm64_ftr_bits ftr_id_mmfr0[] = {
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_id_aa64dfr0[] = { static const struct arm64_ftr_bits ftr_id_aa64dfr0[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 32, 32, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 32, 32, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, ID_AA64DFR0_CTX_CMPS_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, ID_AA64DFR0_CTX_CMPS_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, ID_AA64DFR0_WRPS_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, ID_AA64DFR0_WRPS_SHIFT, 4, 0),
...@@ -178,14 +178,14 @@ static struct arm64_ftr_bits ftr_id_aa64dfr0[] = { ...@@ -178,14 +178,14 @@ static struct arm64_ftr_bits ftr_id_aa64dfr0[] = {
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_mvfr2[] = { static const struct arm64_ftr_bits ftr_mvfr2[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 8, 24, 0), /* RAZ */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 8, 24, 0), /* RAZ */
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 4, 4, 0), /* FPMisc */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 4, 4, 0), /* FPMisc */
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 0, 4, 0), /* SIMDMisc */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 0, 4, 0), /* SIMDMisc */
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_dczid[] = { static const struct arm64_ftr_bits ftr_dczid[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 5, 27, 0), /* RAZ */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 5, 27, 0), /* RAZ */
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 4, 1, 1), /* DZP */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 4, 1, 1), /* DZP */
ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 0, 4, 0), /* BS */ ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 0, 4, 0), /* BS */
...@@ -193,7 +193,7 @@ static struct arm64_ftr_bits ftr_dczid[] = { ...@@ -193,7 +193,7 @@ static struct arm64_ftr_bits ftr_dczid[] = {
}; };
static struct arm64_ftr_bits ftr_id_isar5[] = { static const struct arm64_ftr_bits ftr_id_isar5[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_ISAR5_RDM_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_ISAR5_RDM_SHIFT, 4, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 20, 4, 0), /* RAZ */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 20, 4, 0), /* RAZ */
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_ISAR5_CRC32_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, ID_ISAR5_CRC32_SHIFT, 4, 0),
...@@ -204,14 +204,14 @@ static struct arm64_ftr_bits ftr_id_isar5[] = { ...@@ -204,14 +204,14 @@ static struct arm64_ftr_bits ftr_id_isar5[] = {
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_id_mmfr4[] = { static const struct arm64_ftr_bits ftr_id_mmfr4[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 8, 24, 0), /* RAZ */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 8, 24, 0), /* RAZ */
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 4, 4, 0), /* ac2 */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 4, 4, 0), /* ac2 */
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 0, 4, 0), /* RAZ */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 0, 4, 0), /* RAZ */
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_id_pfr0[] = { static const struct arm64_ftr_bits ftr_id_pfr0[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 16, 16, 0), /* RAZ */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 16, 16, 0), /* RAZ */
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 12, 4, 0), /* State3 */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 12, 4, 0), /* State3 */
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 8, 4, 0), /* State2 */ ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 8, 4, 0), /* State2 */
...@@ -220,7 +220,7 @@ static struct arm64_ftr_bits ftr_id_pfr0[] = { ...@@ -220,7 +220,7 @@ static struct arm64_ftr_bits ftr_id_pfr0[] = {
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_id_dfr0[] = { static const struct arm64_ftr_bits ftr_id_dfr0[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 28, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 28, 4, 0),
S_ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 24, 4, 0xf), /* PerfMon */ S_ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 24, 4, 0xf), /* PerfMon */
ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 20, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 20, 4, 0),
...@@ -238,7 +238,7 @@ static struct arm64_ftr_bits ftr_id_dfr0[] = { ...@@ -238,7 +238,7 @@ static struct arm64_ftr_bits ftr_id_dfr0[] = {
* 0. Covers the following 32bit registers: * 0. Covers the following 32bit registers:
* id_isar[0-4], id_mmfr[1-3], id_pfr1, mvfr[0-1] * id_isar[0-4], id_mmfr[1-3], id_pfr1, mvfr[0-1]
*/ */
static struct arm64_ftr_bits ftr_generic_32bits[] = { static const struct arm64_ftr_bits ftr_generic_32bits[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 28, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 28, 4, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 24, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 24, 4, 0),
ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 20, 4, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_LOWER_SAFE, 20, 4, 0),
...@@ -250,17 +250,17 @@ static struct arm64_ftr_bits ftr_generic_32bits[] = { ...@@ -250,17 +250,17 @@ static struct arm64_ftr_bits ftr_generic_32bits[] = {
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_generic[] = { static const struct arm64_ftr_bits ftr_generic[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 0, 64, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 0, 64, 0),
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_generic32[] = { static const struct arm64_ftr_bits ftr_generic32[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 0, 32, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 0, 32, 0),
ARM64_FTR_END, ARM64_FTR_END,
}; };
static struct arm64_ftr_bits ftr_aa64raz[] = { static const struct arm64_ftr_bits ftr_aa64raz[] = {
ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 0, 64, 0), ARM64_FTR_BITS(FTR_STRICT, FTR_EXACT, 0, 64, 0),
ARM64_FTR_END, ARM64_FTR_END,
}; };
...@@ -346,7 +346,8 @@ static struct arm64_ftr_reg *get_arm64_ftr_reg(u32 sys_id) ...@@ -346,7 +346,8 @@ static struct arm64_ftr_reg *get_arm64_ftr_reg(u32 sys_id)
search_cmp_ftr_reg); search_cmp_ftr_reg);
} }
static u64 arm64_ftr_set_value(struct arm64_ftr_bits *ftrp, s64 reg, s64 ftr_val) static u64 arm64_ftr_set_value(const struct arm64_ftr_bits *ftrp, s64 reg,
s64 ftr_val)
{ {
u64 mask = arm64_ftr_mask(ftrp); u64 mask = arm64_ftr_mask(ftrp);
...@@ -355,7 +356,8 @@ static u64 arm64_ftr_set_value(struct arm64_ftr_bits *ftrp, s64 reg, s64 ftr_val ...@@ -355,7 +356,8 @@ static u64 arm64_ftr_set_value(struct arm64_ftr_bits *ftrp, s64 reg, s64 ftr_val
return reg; return reg;
} }
static s64 arm64_ftr_safe_value(struct arm64_ftr_bits *ftrp, s64 new, s64 cur) static s64 arm64_ftr_safe_value(const struct arm64_ftr_bits *ftrp, s64 new,
s64 cur)
{ {
s64 ret = 0; s64 ret = 0;
...@@ -407,7 +409,7 @@ static void __init init_cpu_ftr_reg(u32 sys_reg, u64 new) ...@@ -407,7 +409,7 @@ static void __init init_cpu_ftr_reg(u32 sys_reg, u64 new)
{ {
u64 val = 0; u64 val = 0;
u64 strict_mask = ~0x0ULL; u64 strict_mask = ~0x0ULL;
struct arm64_ftr_bits *ftrp; const struct arm64_ftr_bits *ftrp;
struct arm64_ftr_reg *reg = get_arm64_ftr_reg(sys_reg); struct arm64_ftr_reg *reg = get_arm64_ftr_reg(sys_reg);
BUG_ON(!reg); BUG_ON(!reg);
...@@ -464,7 +466,7 @@ void __init init_cpu_features(struct cpuinfo_arm64 *info) ...@@ -464,7 +466,7 @@ void __init init_cpu_features(struct cpuinfo_arm64 *info)
static void update_cpu_ftr_reg(struct arm64_ftr_reg *reg, u64 new) static void update_cpu_ftr_reg(struct arm64_ftr_reg *reg, u64 new)
{ {
struct arm64_ftr_bits *ftrp; const struct arm64_ftr_bits *ftrp;
for (ftrp = reg->ftr_bits; ftrp->width; ftrp++) { for (ftrp = reg->ftr_bits; ftrp->width; ftrp++) {
s64 ftr_cur = arm64_ftr_value(ftrp, reg->sys_val); s64 ftr_cur = arm64_ftr_value(ftrp, reg->sys_val);
......
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