Commit e43454c4 authored by Joey Gouly's avatar Joey Gouly Committed by Catalin Marinas
Browse files

arm64: cpufeature: add Permission Indirection Extension cpucap 



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: default avatarJoey Gouly <joey.gouly@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Reviewed-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20230606145859.697944-8-joey.gouly@arm.com


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 2b760046

arch/arm64/kernel/cpufeature.c

+7 −0
Original line number Diff line number Diff line
@@ -2680,6 +2680,13 @@ static const struct arm64_cpu_capabilities arm64_features[] = { 
		.matches = has_cpuid_feature,

		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)

	},

	{},

};

arch/arm64/tools/cpucaps

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ HAS_NESTED_VIRT 
HAS_NO_FPSIMD

HAS_NO_HW_PREFETCH

HAS_PAN

HAS_S1PIE

HAS_RAS_EXTN

HAS_RNG

HAS_SB