linux-kernel - Re: [PATCH v2] x86/mce: fix wrong no-return-ip logic in do_machine

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Message-ID: <20210222102206.GC29063@zn.tnic>
Date:   Mon, 22 Feb 2021 11:22:06 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Aili Yao <yaoaili@...gsoft.com>
Cc:     tony.luck@...el.com, mingo@...hat.com, tglx@...utronix.de,
        hpa@...or.com, x86@...nel.org, linux-edac@...r.kernel.org,
        linux-kernel@...r.kernel.org, yangfeng1@...gsoft.com
Subject: Re: [PATCH v2] x86/mce: fix wrong no-return-ip logic in
 do_machine_check()

On Mon, Feb 22, 2021 at 06:08:19PM +0800, Aili Yao wrote:
> So why would intel provide this MCG_STATUS_RIPV flag, it's better to
> remove it as it will never be set, and all the related logic for this
> flag is really needed ?

Why would it never be set - of course it will be. You don't set it. If
you wanna inject errors, then make sure you inject *valid* errors which
the hardware *actually* generates, not some random ones.

-- 
Regards/Gruss,
    Boris.

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