linux-kernel - Re: [PATCH] x86/split_lock: Enumerate split lock feature on Sapphire Rapids

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Date:   Thu, 16 Jul 2020 12:37:00 -0700
From:   Fenghua Yu <fenghua.yu@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>, Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Tony Luck <tony.luck@...el.com>,
        Ashok Raj <ashok.raj@...el.com>,
        Ravi V Shankar <ravi.v.shankar@...el.com>
Cc:     x86 <x86@...nel.org>, linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86/split_lock: Enumerate split lock feature on Sapphire
 Rapids

Hi, Thomas, Boris, Ingo,

On Fri, Jun 26, 2020 at 02:55:34PM -0700, Fenghua Yu wrote:
> Add Sapphire Rapids processor to CPU list to enumerate split lock
> feature.
> 
> Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
> Reviewed-by: Tony Luck <tony.luck@...el.com>
> ---
>  arch/x86/kernel/cpu/intel.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c
> index c25a67a34bd3..dca069ad6671 100644
> --- a/arch/x86/kernel/cpu/intel.c
> +++ b/arch/x86/kernel/cpu/intel.c
> @@ -1148,6 +1148,7 @@ static const struct x86_cpu_id split_lock_cpu_ids[] __initconst = {
>  	X86_MATCH_INTEL_FAM6_MODEL(ATOM_TREMONT_L,	1),
>  	X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE_L,		1),
>  	X86_MATCH_INTEL_FAM6_MODEL(TIGERLAKE,		1),
> +	X86_MATCH_INTEL_FAM6_MODEL(SAPPHIRERAPIDS_X,	1),
>  	{}
>  };

Any comment on this patch?

Thanks.

-Fenghua