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

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Date:   Wed,  2 Feb 2022 10:50:56 +0100
From:   Vitaly Kuznetsov <vkuznets@...hat.com>
To:     kvm@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        Vineeth Pillai <viremana@...ux.microsoft.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/4] KVM: SVM: nSVM: Implement Enlightened MSR-Bitmap for Hyper-V-on-KVM

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

-- 
2.34.1