Re: [PATCH v7 2/6] arm64: cpufeature: add AmpereOne to BBML2 allow list

[Yang Shi]

On 8/29/25 4:52 AM, Ryan Roberts wrote:
> From: Yang Shi <yang@xxxxxxxxxxxxxxxxxxxxxx>
>
> AmpereOne supports BBML2 without conflict abort, add to the allow list.
>
> Signed-off-by: Yang Shi <yang@xxxxxxxxxxxxxxxxxxxxxx>
> Reviewed-by: Christoph Lameter (Ampere) <cl@xxxxxxxxxx>
> Reviewed-by: Ryan Roberts <ryan.roberts@xxxxxxx>

I saw Catalin gave Reviewed-by to v6 of this patch, I think we can keep it.

Yang

> ---
>   arch/arm64/kernel/cpufeature.c | 2 ++
>   1 file changed, 2 insertions(+)
>
> diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
> index 9ad065f15f1d..b93f4ee57176 100644
> --- a/arch/arm64/kernel/cpufeature.c
> +++ b/arch/arm64/kernel/cpufeature.c
> @@ -2234,6 +2234,8 @@ static bool has_bbml2_noabort(const struct arm64_cpu_capabilities *caps, int sco
>   	static const struct midr_range supports_bbml2_noabort_list[] = {
>   		MIDR_REV_RANGE(MIDR_CORTEX_X4, 0, 3, 0xf),
>   		MIDR_REV_RANGE(MIDR_NEOVERSE_V3, 0, 2, 0xf),
> +		MIDR_ALL_VERSIONS(MIDR_AMPERE1),
> +		MIDR_ALL_VERSIONS(MIDR_AMPERE1A),
>   		{}
>   	};
>