linux-kernel - Re: [PATCH -v3] KVM: MCE: Add MCE support to KVM

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Message-ID: <4A1ADED5.4020605@redhat.com>
Date:	Mon, 25 May 2009 21:09:25 +0300
From:	Avi Kivity <avi@...hat.com>
To:	Jan Kiszka <jan.kiszka@...mens.com>
CC:	Huang Ying <ying.huang@...el.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH -v3] KVM: MCE: Add MCE support to KVM

Jan Kiszka wrote:
> Avi Kivity wrote:
>   
>> Huang Ying wrote:
>>     
>>> The related MSRs are emulated. MCE capability is exported via
>>> extension KVM_CAP_MCE and ioctl KVM_X86_GET_MCE_CAP_SUPPORTED.  A new
>>> vcpu ioctl command KVM_X86_SETUP_MCE is used to setup MCE emulation
>>> such as the mcg_cap. MCE is injected via vcpu ioctl command
>>> KVM_X86_SET_MCE. Extended machine-check state (MCG_EXT_P) and CMCI are
>>> not implemented.
>>>
>>>   
>>>       
>> Applied, thanks.
>>
>>     
>
> This patch breaks kvm build for 32-bit hosts.
>   

Strange, I build-test on i386.  What's your failure?

> Is the KVM MCE interface completely or only partially limited to x86-64,
> ie. can I completely #ifdef it away on 32-bit hosts (including
> KVM_CAP_MCE) or is this more complicated?
>   

I don't see any reason to limit it to x86_64?

-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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