linux-kernel - Re: [PATCH v2 27/28] KVM: VMX: Cache MSR_IA32_VMX_MISC in vmcs

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Message-ID: <CALMp9eRvaiz32TiOwEN0HXn3n8r3fkeJCKVmiBVuXrcUagRzXQ@mail.gmail.com>
Date:   Wed, 29 Jun 2022 11:33:43 -0700
From:   Jim Mattson <jmattson@...gle.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>
Cc:     kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Anirudh Rayabharam <anrayabh@...ux.microsoft.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 27/28] KVM: VMX: Cache MSR_IA32_VMX_MISC in vmcs_config

On Wed, Jun 29, 2022 at 8:07 AM Vitaly Kuznetsov <vkuznets@...hat.com> wrote:
>
> Like other host VMX control MSRs, MSR_IA32_VMX_MISC can be cached in
> vmcs_config to avoid the need to re-read it later, e.g. from
> cpu_has_vmx_intel_pt() or cpu_has_vmx_shadow_vmcs().
>
> No (real) functional change intended.
>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
Reviewed-by: Jim Mattson <jmattson@...gle.com>