linux-kernel - Re: [PATCH v3 2/2] x86/mce: add CMCI support for Centaur CPUs

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Message-ID: <20180430094802.GF6509@pd.tnic>
Date:   Mon, 30 Apr 2018 11:48:02 +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, gregkh@...uxfoundation.org, x86@...nel.org,
        linux-kernel@...r.kernel.org, linux-edac@...r.kernel.org,
        brucechang@...-alliance.com, cooperyan@...oxin.com,
        qiyuanwang@...oxin.com, benjaminpan@...tech.com,
        lukelin@...cpu.com, timguo@...oxin.com
Subject: Re: [PATCH v3 2/2] x86/mce: add CMCI support for Centaur CPUs

On Wed, Apr 25, 2018 at 06:33:40PM +0800, David Wang wrote:
> Newer Centaur support CMCI mechnism, which is compatible with INTEL CMCI.
> 
> Signed-off-by: David Wang <davidwang@...oxin.com>
> ---
>  arch/x86/kernel/cpu/mcheck/mce.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
> index 38ccab8..f9a7295 100644
> --- a/arch/x86/kernel/cpu/mcheck/mce.c
> +++ b/arch/x86/kernel/cpu/mcheck/mce.c
> @@ -1757,6 +1757,8 @@ static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c)
>  		}
>  	case X86_VENDOR_CENTAUR:
>  		mce_centaur_feature_init(c);
> +		mce_intel_feature_init(c);
> +		mce_adjust_timer = cmci_intel_adjust_timer;

This won't work in configs with CONFIG_X86_MCE_INTEL disabled.

You need to define CONFIG_X86_MCE_CENTAUR or so which depends on
CONFIG_CPU_SUP_CENTAUR and CONFIG_X86_MCE_INTEL and which then makes
sure the intel CMCI et al stuff is enabled.

-- 
Regards/Gruss,
    Boris.

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