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

Paolo Bonzini
2022-02-02T17:14:53Z

On 2/2/22 10:50, Vitaly Kuznetsov wrote:
> 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
>

Queued, thanks.

Paolo