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| author |   Marc Zyngier <maz@kernel.org> | 2021-10-17 13:42:22 +0100 |
|---|---|---|
| committer |   Will Deacon <will@kernel.org> | 2021-10-19 10:56:20 +0100 |
| commit | fdf865988b5a404f91f86a1b3b665440a9ebafb2 (patch) | |
| tree | 6307a757fc6cdc9940778f5ad182771cc488d308 | |
| parent | Merge branch 'timers/drivers/armv8.6_arch_timer' of https://git.linaro.org/people/daniel.lezcano/linux into for-next/8.6-timers (diff) | |
| download | linux-dev-fdf865988b5a404f91f86a1b3b665440a9ebafb2.tar.xz linux-dev-fdf865988b5a404f91f86a1b3b665440a9ebafb2.zip | |
arm64: Add a capability for FEAT_ECV
Add a new capability to detect the Enhanced Counter Virtualization
feature (FEAT_ECV).
Reviewed-by: Oliver Upton <oupton@google.com>
Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20211017124225.3018098-15-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 10 | ||||
| -rw-r--r-- | arch/arm64/tools/cpucaps | 1 |
2 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 6ec7036ef7e1..6fc33365cffe 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 49305c2e6dfd..7a7c58acd8f0 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 |