Commit 3496f693 authored by Joey Gouly's avatar Joey Gouly Committed by Will Deacon
Browse files

arm64: cpufeature: add Permission Overlay Extension cpucap 



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

Signed-off-by: default avatarJoey Gouly <joey.gouly@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Acked-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Reviewed-by: default avatarAnshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/20240822151113.1479789-6-joey.gouly@arm.com


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 878c05e8

arch/arm64/kernel/cpufeature.c

+9 −0
Original line number Diff line number Diff line
@@ -2870,6 +2870,15 @@ static const struct arm64_cpu_capabilities arm64_features[] = { 
		.matches = has_nv1,

		ARM64_CPUID_FIELDS_NEG(ID_AA64MMFR4_EL1, E2H0, NI_NV1)

	},

#ifdef CONFIG_ARM64_POE

	{

		.desc = "Stage-1 Permission Overlay Extension (S1POE)",

		.capability = ARM64_HAS_S1POE,

		.type = ARM64_CPUCAP_BOOT_CPU_FEATURE,

		.matches = has_cpuid_feature,

		ARM64_CPUID_FIELDS(ID_AA64MMFR3_EL1, S1POE, IMP)

	},

#endif

	{},

};

arch/arm64/tools/cpucaps

+1 −0
Original line number Diff line number Diff line
@@ -45,6 +45,7 @@ HAS_MOPS 
HAS_NESTED_VIRT

HAS_PAN

HAS_S1PIE

HAS_S1POE

HAS_RAS_EXTN

HAS_RNG

HAS_SB