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arm64: Rename SVE/SME cpu_enable functions

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The arm64_cpu_capabilities::cpu_enable() callbacks for SVE, SME, SME2,
and FA64 are named with an unusual "${feature}_kernel_enable" pattern
rather than the much more common "cpu_enable_${feature}". Now that we
only use these as cpu_enable() callbacks, it would be nice to have them
match the usual scheme.

This patch renames the cpu_enable() callbacks to match this scheme. At
the same time, the comment above cpu_enable_sve() is removed for
consistency with the other cpu_enable() callbacks.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Rutland 2023-10-16 11:24:35 +01:00 committed by Catalin Marinas
parent 9077229170
commit 14567ba42c
3 changed files with 12 additions and 16 deletions
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8
arch/arm64/include/asm/fpsimd.h
View File

@ -149,10 +149,10 @@ extern void sme_save_state(void *state, int zt);
extern void sme_load_state(void const *state, int zt);
struct arm64_cpu_capabilities;
extern void sve_kernel_enable(const struct arm64_cpu_capabilities *__unused);
extern void sme_kernel_enable(const struct arm64_cpu_capabilities *__unused);
extern void sme2_kernel_enable(const struct arm64_cpu_capabilities *__unused);
extern void fa64_kernel_enable(const struct arm64_cpu_capabilities *__unused);
extern void cpu_enable_sve(const struct arm64_cpu_capabilities *__unused);
extern void cpu_enable_sme(const struct arm64_cpu_capabilities *__unused);
extern void cpu_enable_sme2(const struct arm64_cpu_capabilities *__unused);
extern void cpu_enable_fa64(const struct arm64_cpu_capabilities *__unused);
extern u64 read_zcr_features(void);
extern u64 read_smcr_features(void);

8
arch/arm64/kernel/cpufeature.c
View File

@ -2425,7 +2425,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.desc = "Scalable Vector Extension",
.type = ARM64_CPUCAP_SYSTEM_FEATURE,
.capability = ARM64_SVE,
.cpu_enable = sve_kernel_enable,
.cpu_enable = cpu_enable_sve,
.matches = has_cpuid_feature,
ARM64_CPUID_FIELDS(ID_AA64PFR0_EL1, SVE, IMP)
},
@ -2678,7 +2678,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.type = ARM64_CPUCAP_SYSTEM_FEATURE,
.capability = ARM64_SME,
.matches = has_cpuid_feature,
.cpu_enable = sme_kernel_enable,
.cpu_enable = cpu_enable_sme,
ARM64_CPUID_FIELDS(ID_AA64PFR1_EL1, SME, IMP)
},
/* FA64 should be sorted after the base SME capability */
@ -2687,7 +2687,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.type = ARM64_CPUCAP_SYSTEM_FEATURE,
.capability = ARM64_SME_FA64,
.matches = has_cpuid_feature,
.cpu_enable = fa64_kernel_enable,
.cpu_enable = cpu_enable_fa64,
ARM64_CPUID_FIELDS(ID_AA64SMFR0_EL1, FA64, IMP)
},
{
@ -2695,7 +2695,7 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.type = ARM64_CPUCAP_SYSTEM_FEATURE,
.capability = ARM64_SME2,
.matches = has_cpuid_feature,
.cpu_enable = sme2_kernel_enable,
.cpu_enable = cpu_enable_sme2,
ARM64_CPUID_FIELDS(ID_AA64PFR1_EL1, SME, SME2)
},
#endif /* CONFIG_ARM64_SME */

12
arch/arm64/kernel/fpsimd.c
View File

@ -1160,11 +1160,7 @@ fail:
panic("Cannot allocate percpu memory for EFI SVE save/restore");
}
/*
* Enable SVE for EL1.
* Intended for use by the cpufeatures code during CPU boot.
*/
void sve_kernel_enable(const struct arm64_cpu_capabilities *__always_unused p)
void cpu_enable_sve(const struct arm64_cpu_capabilities *__always_unused p)
{
write_sysreg(read_sysreg(CPACR_EL1) | CPACR_EL1_ZEN_EL1EN, CPACR_EL1);
isb();
@ -1295,7 +1291,7 @@ static void sme_free(struct task_struct *task)
task->thread.sme_state = NULL;
}
void sme_kernel_enable(const struct arm64_cpu_capabilities *__always_unused p)
void cpu_enable_sme(const struct arm64_cpu_capabilities *__always_unused p)
{
/* Set priority for all PEs to architecturally defined minimum */
write_sysreg_s(read_sysreg_s(SYS_SMPRI_EL1) & ~SMPRI_EL1_PRIORITY_MASK,
@ -1310,7 +1306,7 @@ void sme_kernel_enable(const struct arm64_cpu_capabilities *__always_unused p)
isb();
}
void sme2_kernel_enable(const struct arm64_cpu_capabilities *__always_unused p)
void cpu_enable_sme2(const struct arm64_cpu_capabilities *__always_unused p)
{
/* This must be enabled after SME */
BUILD_BUG_ON(ARM64_SME2 <= ARM64_SME);
@ -1320,7 +1316,7 @@ void sme2_kernel_enable(const struct arm64_cpu_capabilities *__always_unused p)
SYS_SMCR_EL1);
}
void fa64_kernel_enable(const struct arm64_cpu_capabilities *__always_unused p)
void cpu_enable_fa64(const struct arm64_cpu_capabilities *__always_unused p)
{
/* This must be enabled after SME */
BUILD_BUG_ON(ARM64_SME_FA64 <= ARM64_SME);