linux-kernel - Re: [PATCH RESEND] Enable full width counting for KVM: x86/pmu

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Message-ID: <800997eb-91f9-efb4-34f5-44e130e720ab@intel.com>
Date:   Fri, 29 May 2020 16:52:31 +0800
From:   "Xu, Like" <like.xu@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Like Xu <like.xu@...ux.intel.com>
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND] Enable full width counting for KVM: x86/pmu

On 2020/5/29 16:47, Paolo Bonzini wrote:
> On 29/05/20 09:43, Like Xu wrote:
>> Hi Paolo,
>>
>> As you said, you will queue the v3 of KVM patch, but it looks like we
>> are missing that part at the top of the kvm/queue tree.
>>
>> For your convenience, let me resend v4 so that we can upstream this
>> feature in the next merged window. Also this patch series includes
>> patches for qemu and kvm-unit-tests. Please help review.
>>
>> Previous:
>> https://lore.kernel.org/kvm/f1c77c79-7ff8-c5f3-e011-9874a4336217@redhat.com/
>>
>> Like Xu (1):
>>    KVM: x86/pmu: Support full width counting
>>    [kvm-unit-tests] x86: pmu: Test full-width counter writes
>>    [Qemu-devel] target/i386: define a new MSR based feature
>>   word - FEAT_PERF_CAPABILITIES
>>
>> Wei Wang (1):
>>    KVM: x86/pmu: Tweak kvm_pmu_get_msr to pass 'struct msr_data' in
>>
>>   arch/x86/include/asm/kvm_host.h |  1 +
>>   arch/x86/kvm/cpuid.c            |  2 +-
>>   arch/x86/kvm/pmu.c              |  4 +-
>>   arch/x86/kvm/pmu.h              |  4 +-
>>   arch/x86/kvm/svm/pmu.c          |  7 ++--
>>   arch/x86/kvm/vmx/capabilities.h | 11 +++++
>>   arch/x86/kvm/vmx/pmu_intel.c    | 71 +++++++++++++++++++++++++++------
>>   arch/x86/kvm/vmx/vmx.c          |  3 ++
>>   arch/x86/kvm/x86.c              |  6 ++-
>>   9 files changed, 87 insertions(+), 22 deletions(-)
>>
> Thanks, I was busy with AMD stuff as you saw. :)  I've queued it now.
Yes, we all know you're busy.

I will be very grateful if you could comment the KVM part for the LBR 
feature. :D

https://lore.kernel.org/kvm/20200514083054.62538-1-like.xu@linux.intel.com/

Thanks,
Like Xu
>
> Paolo
>