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Date:   Mon, 18 Oct 2021 17:20:48 +0200
From:   Paolo Bonzini <>
To:     Xiaoyao Li <>
Cc:     Sean Christopherson <>,
        Vitaly Kuznetsov <>,
        Wanpeng Li <>,
        Jim Mattson <>,
        Joerg Roedel <>,,
Subject: Re: [PATCH v2 7/7] KVM: VMX: Only context switch some PT MSRs when
 they exist

On 18/10/21 16:04, Xiaoyao Li wrote:
>> If intel_pt_validate_hw_cap is not fast enough, it should be optimized.
>> Something like this:
> If I understand correctly, you mean we don't need to cache the existence 
> with two variable, right?

Yes, exactly.


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