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arm64: cpufeature: add Permission Indirection Extension cpucap

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This indicates if the system supports PIE. This is a CPUCAP_BOOT_CPU_FEATURE
as the boot CPU will enable PIE if it has it, so secondary CPUs must also
have this feature.

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230606145859.697944-8-joey.gouly@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Joey Gouly 2023-06-06 15:58:46 +01:00 committed by Catalin Marinas
parent 2b760046a2
commit e43454c442
2 changed files with 8 additions and 0 deletions
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7
arch/arm64/kernel/cpufeature.c
View file

@ -2680,6 +2680,13 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
.matches = has_cpuid_feature, .matches = has_cpuid_feature,
ARM64_CPUID_FIELDS(ID_AA64MMFR3_EL1, TCRX, IMP) ARM64_CPUID_FIELDS(ID_AA64MMFR3_EL1, TCRX, IMP)
}, },
{
.desc = "Stage-1 Permission Indirection Extension (S1PIE)",
.capability = ARM64_HAS_S1PIE,
.type = ARM64_CPUCAP_BOOT_CPU_FEATURE,
.matches = has_cpuid_feature,
ARM64_CPUID_FIELDS(ID_AA64MMFR3_EL1, S1PIE, IMP)
},
{}, {},
}; };

1
arch/arm64/tools/cpucaps
View file

@ -40,6 +40,7 @@ HAS_NESTED_VIRT
HAS_NO_FPSIMD HAS_NO_FPSIMD
HAS_NO_HW_PREFETCH HAS_NO_HW_PREFETCH
HAS_PAN HAS_PAN
HAS_S1PIE
HAS_RAS_EXTN HAS_RAS_EXTN
HAS_RNG HAS_RNG
HAS_SB HAS_SB