Commit fdf86598 authored by Marc Zyngier's avatar Marc Zyngier Committed by Will Deacon
Browse files

arm64: Add a capability for FEAT_ECV 



Add a new capability to detect the Enhanced Counter Virtualization
feature (FEAT_ECV).

Reviewed-by: default avatarOliver Upton <oupton@google.com>
Acked-by: default avatarWill Deacon <will@kernel.org>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211017124225.3018098-15-maz@kernel.org


Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent 0e277fb8

arch/arm64/kernel/cpufeature.c

+10 −0
Original line number Diff line number Diff line
@@ -1930,6 +1930,16 @@ static const struct arm64_cpu_capabilities arm64_features[] = { 
		.sign = FTR_UNSIGNED,

		.min_field_value = 1,

	},

	{

		.desc = "Enhanced Counter Virtualization",

		.capability = ARM64_HAS_ECV,

		.type = ARM64_CPUCAP_SYSTEM_FEATURE,

		.matches = has_cpuid_feature,

		.sys_reg = SYS_ID_AA64MMFR0_EL1,

		.field_pos = ID_AA64MMFR0_ECV_SHIFT,

		.sign = FTR_UNSIGNED,

		.min_field_value = 1,

	},

#ifdef CONFIG_ARM64_PAN

	{

		.desc = "Privileged Access Never",

arch/arm64/tools/cpucaps

+1 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ HAS_CRC32 
HAS_DCPODP

HAS_DCPOP

HAS_E0PD

HAS_ECV

HAS_EPAN

HAS_GENERIC_AUTH

HAS_GENERIC_AUTH_ARCH