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

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Message-ID: <20210222173109.7b7ac42a@alex-virtual-machine>
Date:   Mon, 22 Feb 2021 17:31:09 +0800
From:   Aili Yao <yaoaili@...gsoft.com>
To:     Borislav Petkov <bp@...en8.de>
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, 22 Feb 2021 10:24:03 +0100
Borislav Petkov <bp@...en8.de> wrote:

> On Mon, Feb 22, 2021 at 11:50:07AM +0800, Aili Yao wrote:
> > From commit b2f9d678e28c ("x86/mce: Check for faults tagged in
> > EXTABLE_CLASS_FAULT exception table entries"), When there is a
> > memory MCE_AR_SEVERITY error with no return ip,  
> 
> What is a "no return ip" - MCG_STATUS_RIPV?

yes 

> How do you trigger this error?

you can inject a memory UE to a VM, it should always be MCG_STATUS_RIPV 0.

Best Regard!
Aili Yao