[PATCH 0/5] KVM: SVM: nSVM: Implement Enlightened MSR-Bitmap for Hyper-V-on-KVM and fix it for KVM-on-Hyper-V

Vitaly Kuznetsov
2021-12-20T15:22:41Z

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(-)

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2.33.1