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Date: Fri, 5 Nov 2021 01:00:31 +0000 From: Sean Christopherson <seanjc@...gle.com> To: Vitaly Kuznetsov <vkuznets@...hat.com> Cc: kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>, Wanpeng Li <wanpengli@...cent.com>, Jim Mattson <jmattson@...gle.com>, Maxim Levitsky <mlevitsk@...hat.com>, linux-kernel@...r.kernel.org Subject: Re: [PATCH v3 2/4] KVM: VMX: Introduce vmx_msr_bitmap_l01_changed() helper On Wed, Oct 13, 2021, Vitaly Kuznetsov wrote: > In preparation to enabling 'Enlightened MSR Bitmap' feature for Hyper-V > guests move MSR bitmap update tracking to a dedicated helper. > > Note: vmx_msr_bitmap_l01_changed() is called when MSR bitmap might be > updated. KVM doesn't check if the bit we're trying to set is already set > (or the bit it's trying to clear is already cleared). Such situations > should not be common and a few false positives should not be a problem. > > No functional change intended. > > Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com> > Reviewed-by: Maxim Levitsky <mlevitsk@...hat.com> > --- Reviewed-by: Sean Christopherson <seanjc@...gle.com>
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