From: Marc Zyngier Date: Sun, 17 Oct 2021 12:42:22 +0000 (+0100) Subject: arm64: Add a capability for FEAT_ECV X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fdf865988b5a404f91f86a1b3b665440a9ebafb2;p=linux.git arm64: Add a capability for FEAT_ECV Add a new capability to detect the Enhanced Counter Virtualization feature (FEAT_ECV). Reviewed-by: Oliver Upton Acked-by: Will Deacon Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211017124225.3018098-15-maz@kernel.org Signed-off-by: Will Deacon --- diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 6ec7036ef7e18..6fc33365cffe3 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -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", diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 49305c2e6dfd3..7a7c58acd8f0d 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -18,6 +18,7 @@ HAS_CRC32 HAS_DCPODP HAS_DCPOP HAS_E0PD +HAS_ECV HAS_EPAN HAS_GENERIC_AUTH HAS_GENERIC_AUTH_ARCH