Messages in this thread | | | Date | Tue, 1 Feb 2022 14:49:08 +0100 | Subject | Re: [PATCH 0/5] KVM: SVM: nSVM: Implement Enlightened MSR-Bitmap for Hyper-V-on-KVM and fix it for KVM-on-Hyper-V | From | Paolo Bonzini <> |
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On 12/20/21 16:21, Vitaly Kuznetsov wrote: > Enlightened MSR-Bitmap feature implements a PV protocol for L0 and L1 > hypervisors to collaborate and skip unneeded updates to MSR-Bitmap. > KVM implements the feature for KVM-on-Hyper-V but it seems there was > a flaw in the implementation and the feature may not be fully functional. > PATCHes 1-2 fix the problem. The rest of the series implements the same > feature for Hyper-V-on-KVM. > > Vitaly Kuznetsov (5): > KVM: SVM: Drop stale comment from > svm_hv_vmcb_dirty_nested_enlightenments() > KVM: SVM: hyper-v: Enable Enlightened MSR-Bitmap support for real > KVM: nSVM: Track whether changes in L0 require MSR bitmap for L2 to be > rebuilt > KVM: x86: Make kvm_hv_hypercall_enabled() static inline > KVM: nSVM: Implement Enlightened MSR-Bitmap feature > > arch/x86/kvm/hyperv.c | 12 +-------- > arch/x86/kvm/hyperv.h | 6 ++++- > arch/x86/kvm/svm/nested.c | 47 ++++++++++++++++++++++++++++----- > arch/x86/kvm/svm/svm.c | 3 ++- > arch/x86/kvm/svm/svm.h | 16 +++++++---- > arch/x86/kvm/svm/svm_onhyperv.h | 12 +++------ > 6 files changed, 63 insertions(+), 33 deletions(-) >
Queued 3-5 now, but it would be nice to have some testcases.
Paolo
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