[PATCH v3 12/28] arm64: Add FEAT_NV2p1 detection

[Yao Yuan]

On Wed, Jul 22, 2026 at 08:42:18AM +0800, Marc Zyngier wrote:
> Add the necessary NV2p1 probing to the cpufeature infrastructure.
>
> Signed-off-by: Marc Zyngier <maz at kernel.org>
> ---
>  arch/arm64/kernel/cpufeature.c | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
> index 9a22df0c5120f..c9c124b0ccc8e 100644
> --- a/arch/arm64/kernel/cpufeature.c
> +++ b/arch/arm64/kernel/cpufeature.c
> @@ -2620,6 +2620,13 @@ static const struct arm64_cpu_capabilities arm64_features[] = {
>  			{ /* Sentinel */ }
>  		},
>  	},
> +	{
> +		.desc = "FEAT_NV2p1",
> +		.capability = ARM64_HAS_NV2P1,
> +		.type = ARM64_CPUCAP_SYSTEM_FEATURE,
> +		.matches = has_cpuid_feature,
> +		ARM64_CPUID_FIELDS(ID_AA64MMFR4_EL1, NV_frac, NV2P1)
> +	},

Reviewed-by: Yuan Yao <yaoyuan at linux.alibaba.com>

>  	{
>  		.capability = ARM64_HAS_32BIT_EL0_DO_NOT_USE,
>  		.type = ARM64_CPUCAP_SYSTEM_FEATURE,
> --
> 2.47.3