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

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Date:   Mon, 22 Feb 2021 20:35:49 +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 13:22:41 +0100
Borislav Petkov <bp@...en8.de> wrote:

> On Mon, Feb 22, 2021 at 08:17:23PM +0800, Aili Yao wrote:
> > AR (Action Required) flag, bit 55 - Indicates (when set) that MCA
> > error code specific recovery action must be...  
> 
> Give me the *exact* MCE signature you're injecting please.
> 
> Thx.
> 

Guest VM, the qemu has no way to know the RIPV value, so always get it cleared.

Hardware event. This is not a software error.
MCE 0
CPU 9 BANK 9 TSC 103d511e68c
RIP 33:401270
MISC 8c ADDR 10e91d000
TIME 1613974147 Mon Feb 22 01:09:07 2021
MCG status:EIPV MCIP LMCE
MCi status:
Uncorrected error
Error enabled
MCi_MISC register valid
MCi_ADDR register valid
SRAR
MCA: Data CACHE Level-0 Data-Read Error
STATUS bd80000000000134 MCGSTATUS e
MCGCAP 900010a APICID 9 SOCKETID 9
MICROCODE 1
CPUID Vendor Intel Family 6 Model 85 Step 7

Host:
Hardware event. This is not a software error.
MCE 0
CPU 1 BANK 1 TSC 1ee4f074462
RIP 33:4013a6
MISC 86 ADDR 10ed608000
TIME 1613985132 Mon Feb 22 17:12:12 2021
MCG status:RIPV EIPV MCIP LMCE
MCi status:
Uncorrected error
Error enabled
MCi_MISC register valid
MCi_ADDR register valid
SRAR
MCA: Data CACHE Level-0 Data-Read Error
STATUS bd80000000100134 MCGSTATUS f
MCGCAP f000c14 APICID 2 SOCKETID 0
MICROCODE 5000021
CPUID Vendor Intel Family 6 Model 85