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Re: [Qemu-devel] [PATCH v3 0/4] X86/KVM: enable Intel MPX for KVM
From: |
Liu, Jinsong |
Subject: |
Re: [Qemu-devel] [PATCH v3 0/4] X86/KVM: enable Intel MPX for KVM |
Date: |
Tue, 18 Feb 2014 09:32:00 +0000 |
Paolo Bonzini wrote:
> Il 22/01/2014 13:03, Paolo Bonzini ha scritto:
>> Il 22/01/2014 06:29, Liu, Jinsong ha scritto:
>>> These patches are version 3 to enalbe Intel MPX for KVM.
>>>
>>> Version 1:
>>> * Add some Intel MPX definiation
>>> * Fix a cpuid(0x0d, 0) exposing bug, dynamic per XCR0 features
>>> enable/disable
>>> * vmx and msr handle for MPX support at KVM
>>> * enalbe MPX feature for guest
>>>
>>> Version 2:
>>> * remove generic MPX definiation, Qiaowei's patch has add the
>>> definiation at kernel side
>>> * add MSR_IA32_BNDCFGS to msrs_to_save
>>>
>>> Version 3:
>>> * rebase on latest kernel, which include Qiaowei's MPX common
>>> definiation pulled from HPA's tree
>>
>> I am afraid there is still some work to do on these patches, so they
>> need to be delayed to 3.15.
>>
>> Patch 1:
>> this seems mostly separate from the rest of the MPX work. I
>> commented on the missing "ULL" suffix, but I would also like to
>> understand why you put this patch in this series.
>>
>> Patch 2:
>> As remarked in the reply to this patch:
>> - the vmx_disable_intercept_for_msr has to be unconditional
>> - you need a new kvm_x86_ops member mpx_supported, to disable
>> MPX whenever the two VMX controls are not available.
>>
>> Patch 3:
>> this patch needs to be rebased. Apart from that it is fine,
>> but please move the VMX bits together with patch 2, and the
>> other bits together with patch 4.
>>
>> Patch 4:
>> this patch needs to be rebased and to use the new mpx_supported
>> member
>>
>> If you also want to look at nested VMX support for MPX, that would be
>> nice. It should not be hard. Otherwise we can take care of that
>> later.
>>
>> Thanks for your work,
>>
>> Paolo
>
> Are you going to send v4?
>
> Paolo
Yes, I just return from long Chinese Spring Festival, I will send V4 later.
Thanks,
Jinsong