linux-kernel - [PATCH 0/2] KVM: x86: Convey the exit reason to user-space on emulation failure

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Date:   Mon, 28 Jun 2021 18:31:50 +0100
From:   David Edmondson <david.edmondson@...cle.com>
To:     linux-kernel@...r.kernel.org
Cc:     kvm@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Joerg Roedel <joro@...tes.org>, Ingo Molnar <mingo@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Paolo Bonzini <pbonzini@...hat.com>, x86@...nel.org,
        David Edmondson <david.edmondson@...cle.com>
Subject: [PATCH 0/2] KVM: x86: Convey the exit reason to user-space on emulation failure

To aid in debugging failures in the field, when instruction emulation
fails, report the VM exit reason to userspace in order that it can be
recorded.

The changes are on top of Aaron's patches from
https://lore.kernel.org/r/20210510144834.658457-1-aaronlewis@google.com
which are in the KVM queue, but not yet upstream.

David Edmondson (2):
  KVM: x86: Add kvm_x86_ops.get_exit_reason
  KVM: x86: On emulation failure, convey the exit reason to userspace

 arch/x86/include/asm/kvm-x86-ops.h |  1 +
 arch/x86/include/asm/kvm_host.h    |  1 +
 arch/x86/kvm/svm/svm.c             |  6 ++++++
 arch/x86/kvm/vmx/vmx.c             |  6 ++++++
 arch/x86/kvm/x86.c                 | 23 +++++++++++++++++------
 include/uapi/linux/kvm.h           |  2 ++
 6 files changed, 33 insertions(+), 6 deletions(-)

-- 
2.30.2