linux-kernel - [PATCH v2 0/7] KVM: nVMX: Bug fixes and cleanup

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Date:   Wed, 23 Sep 2020 11:44:45 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Dan Cross <dcross@...gle.com>,
        Peter Shier <pshier@...gle.com>
Subject: [PATCH v2 0/7]  KVM: nVMX: Bug fixes and cleanup

Fix for a brutal segment caching bug that manifested as random nested
VM-Enter failures when running with unrestricted guest disabled.  A few
more bug fixes and cleanups for stuff found by inspection when hunting
down the caching issue.

v2:
  - Rebased to kvm/queue, commit e1ba1a15af73 ("KVM: SVM: Enable INVPCID
    feature on AMD").

Sean Christopherson (7):
  KVM: nVMX: Reset the segment cache when stuffing guest segs
  KVM: nVMX: Reload vmcs01 if getting vmcs12's pages fails
  KVM: nVMX: Explicitly check for valid guest state for !unrestricted
    guest
  KVM: nVMX: Move free_nested() below vmx_switch_vmcs()
  KVM: nVMX: Ensure vmcs01 is the loaded VMCS when freeing nested state
  KVM: nVMX: Drop redundant VMCS switch and free_nested() call
  KVM: nVMX: WARN on attempt to switch the currently loaded VMCS

 arch/x86/kvm/vmx/nested.c | 103 ++++++++++++++++++++------------------
 arch/x86/kvm/vmx/vmx.c    |   8 +--
 arch/x86/kvm/vmx/vmx.h    |   9 ++++
 3 files changed, 65 insertions(+), 55 deletions(-)

-- 
2.28.0