linux-kernel - Re: [PATCH 1/2] x86/mce: new centaur CPUs support MCE broadcasting

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Message-ID: <20180330102621.GA30063@pd.tnic>
Date:   Fri, 30 Mar 2018 12:26:21 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     David Wang <davidwang@...oxin.com>
Cc:     tony.luck@...el.com, tglx@...utronix.de, mingo@...hat.com,
        hpa@...or.com, x86@...nel.org, linux-edac@...r.kernel.org,
        linux-kernel@...r.kernel.org, brucechang@...-alliance.com,
        cooperyan@...oxin.com, qiyuanwang@...oxin.com,
        benjaminpan@...tech.com, lukelin@...cpu.com, timguo@...oxin.com
Subject: Re: [PATCH 1/2] x86/mce: new centaur CPUs support MCE broadcasting

On Fri, Mar 30, 2018 at 05:53:41PM +0800, David Wang wrote:
> This patch is used to tell the kernel that newer Centaur CPU support MCE
> broadcasting.
> 
> Signed-off-by: David Wang <davidwang@...oxin.com>
> ---
>  arch/x86/kernel/cpu/mcheck/mce.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
> index 7065846..82b25e1 100644
> --- a/arch/x86/kernel/cpu/mcheck/mce.c
> +++ b/arch/x86/kernel/cpu/mcheck/mce.c
> @@ -1688,6 +1688,17 @@ static int __mcheck_cpu_apply_quirks(struct cpuinfo_x86 *c)
>  		if (c->x86 == 6 && c->x86_model == 45)
>  			quirk_no_way_out = quirk_sandybridge_ifu;
>  	}
> +
> +	if (c->x86_vendor == X86_VENDOR_CENTAUR) {
> +		/*
> +		 * All newer centaur CPUs support MCE broadcasting. Enable
> +		 * synchronization with a one second timeout.
> +		 */
> +		if ((c->x86 > 6 || (c->x86 == 6 && c->x86_model == 0xf && c->x86_mask >=0xe)) &&

Are some specs or manuals available somewhere on the web for those?

Thx.

-- 
Regards/Gruss,
    Boris.

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