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[Qemu-devel] Re: [PATCH 09/13] kvm: x86: Consolidate TCG and KVM MCE inj


From: Jan Kiszka
Subject: [Qemu-devel] Re: [PATCH 09/13] kvm: x86: Consolidate TCG and KVM MCE injection code
Date: Thu, 17 Feb 2011 19:17:04 +0100
User-agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666

On 2011-02-17 19:08, Marcelo Tosatti wrote:
> On Tue, Feb 15, 2011 at 09:23:33AM +0100, Jan Kiszka wrote:
>> This switches KVM's MCE injection path to cpu_x86_inject_mce, both for
>> SIGBUS and monitor initiated events. This means we prepare the MCA MSRs
>> in the VCPUState also for KVM.
>>
>> We have to drop the MSRs writeback restrictions for this purpose which
>> is now safe as every uncoordinated MSR injection is removed with this
>> patch.
>>
>> We have to execute every per-VCPU event setup on the target VCPU as we
>> are performing a read-modify-write on its state.
>>
>> Signed-off-by: Jan Kiszka <address@hidden>
>> CC: Huang Ying <address@hidden>
>> CC: Hidetoshi Seto <address@hidden>
>> CC: Jin Dongming <address@hidden>
> 
> Difficult to review, please split:
> 
> - drop writeback restriction

That will not work due to mutual dependency (see changelog)...

> - unify monitor/sigbus injection paths 
> - cleanup / refactor
> 

...but I will check again and filter out potential cleanups that could
be done afterwards.

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux



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