[PATCH v2 0/4] KVM: SVM: nSVM: Implement Enlightened MSR-Bitmap for Hyper-V-on-KVM

Vitaly Kuznetsov
2022-02-02T09:51:26Z

Changes since v1:
- Patches 1/2 from "[PATCH 0/5] KVM: SVM: nSVM: Implement Enlightened
MSR-Bitmap for Hyper-V-on-KVM and fix it for KVM-on-Hyper-V" are already
merged, dropped.
- Fix build when !CONFIG_HYPERV (PATCH3 "KVM: nSVM: Split off common
definitions for Hyper-V on KVM and KVM on Hyper-V" added).

Description:

Enlightened MSR-Bitmap feature implements a PV protocol for L0 and L1
hypervisors to collaborate and skip unneeded updates to MSR-Bitmap.
KVM already implements the feature for KVM-on-Hyper-V.

Vitaly Kuznetsov (4):
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: Split off common definitions for Hyper-V on KVM and KVM on
Hyper-V
KVM: nSVM: Implement Enlightened MSR-Bitmap feature

arch/x86/kvm/hyperv.c | 12 +--------
arch/x86/kvm/hyperv.h | 6 ++++-
arch/x86/kvm/svm/hyperv.h | 35 ++++++++++++++++++++++++
arch/x86/kvm/svm/nested.c | 47 ++++++++++++++++++++++++++++-----
arch/x86/kvm/svm/svm.c | 3 ++-
arch/x86/kvm/svm/svm.h | 11 ++++++++
arch/x86/kvm/svm/svm_onhyperv.h | 25 +-----------------
7 files changed, 95 insertions(+), 44 deletions(-)
create mode 100644 arch/x86/kvm/svm/hyperv.h

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2.34.1