Messages in this thread | | | Date | Tue, 25 Jan 2022 16:53:22 +0100 | Subject | Re: [PATCH 2/5] KVM: SVM: hyper-v: Enable Enlightened MSR-Bitmap support for real | From | Paolo Bonzini <> |
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On 12/20/21 16:21, Vitaly Kuznetsov wrote: > Commit c4327f15dfc7 ("KVM: SVM: hyper-v: Enlightened MSR-Bitmap support") > introduced enlightened MSR-Bitmap support for KVM-on-Hyper-V but it didn't > actually enable the support. Similar to enlightened NPT TLB flush and > direct TLB flush features, the guest (KVM) has to tell L0 (Hyper-V) that > it's using the feature by setting the appropriate feature fit in VMCB > control area (sw reserved fields). > > Fixes: c4327f15dfc7 ("KVM: SVM: hyper-v: Enlightened MSR-Bitmap support") > Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> > --- > arch/x86/kvm/svm/svm_onhyperv.h | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/x86/kvm/svm/svm_onhyperv.h b/arch/x86/kvm/svm/svm_onhyperv.h > index cdbcfc63d171..489ca56212c6 100644 > --- a/arch/x86/kvm/svm/svm_onhyperv.h > +++ b/arch/x86/kvm/svm/svm_onhyperv.h > @@ -46,6 +46,9 @@ static inline void svm_hv_init_vmcb(struct vmcb *vmcb) > if (npt_enabled && > ms_hyperv.nested_features & HV_X64_NESTED_ENLIGHTENED_TLB) > hve->hv_enlightenments_control.enlightened_npt_tlb = 1; > + > + if (ms_hyperv.nested_features & HV_X64_NESTED_MSR_BITMAP) > + hve->hv_enlightenments_control.msr_bitmap = 1; > } > > static inline void svm_hv_hardware_setup(void)
Queued this one for now.
Paolo
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