linux-kernel - Re: [RFC PATCH] x86/mce: Make mce

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Message-ID: <20200907202737.GF16029@zn.tnic>
Date:   Mon, 7 Sep 2020 22:27:37 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Andy Lutomirski <luto@...nel.org>
Cc:     x86-ml <x86@...nel.org>, Tony Luck <tony.luck@...el.com>,
        lkml <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] x86/mce: Make mce_rdmsrl() do a plain RDMSR only

On Mon, Sep 07, 2020 at 01:16:43PM -0700, Andy Lutomirski wrote:
> > +       asm volatile("rdmsr" : EAX_EDX_RET(val, low, high) : "c" (msr));
> 
> I don't like this.  Plain rdmsrl() will at least print a nice error if it fails.

I think you read my commit message too quickly :)

The point is to not print anything and not have *any* exception handling
or whatever - just plain RDMSR.

-- 
Regards/Gruss,
    Boris.

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