From: David Matlack <dmatlack@google.com>
To: David Edmondson <david.edmondson@oracle.com>
Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Joerg Roedel <joro@8bytes.org>, Ingo Molnar <mingo@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Paolo Bonzini <pbonzini@redhat.com>,
x86@kernel.org
Subject: Re: [PATCH 0/2] KVM: x86: Convey the exit reason to user-space on emulation failure
Date: Wed, 30 Jun 2021 16:33:31 +0000 [thread overview]
Message-ID: <YNyc26bXNg4bEAlG@google.com> (raw)
In-Reply-To: <20210628173152.2062988-1-david.edmondson@oracle.com>
On Mon, Jun 28, 2021 at 06:31:50PM +0100, David Edmondson wrote:
> To aid in debugging failures in the field, when instruction emulation
What do you mean by a "debugging failure"?
> fails, report the VM exit reason to userspace in order that it can be
> recorded.
What is the benefit of seeing the VM-exit reason that led to an
emulation failure?
>
> 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
>
next prev parent reply other threads:[~2021-06-30 16:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-28 17:31 [PATCH 0/2] KVM: x86: Convey the exit reason to user-space on emulation failure David Edmondson
2021-06-28 17:31 ` [PATCH 1/2] KVM: x86: Add kvm_x86_ops.get_exit_reason David Edmondson
2021-06-30 16:36 ` David Matlack
2021-06-28 17:31 ` [PATCH 2/2] KVM: x86: On emulation failure, convey the exit reason to userspace David Edmondson
2021-06-30 16:48 ` David Matlack
2021-07-02 8:44 ` David Edmondson
2021-07-09 21:58 ` Sean Christopherson
2021-07-29 13:48 ` David Edmondson
2021-06-30 16:33 ` David Matlack [this message]
2021-06-30 17:08 ` [PATCH 0/2] KVM: x86: Convey the exit reason to user-space on emulation failure David Matlack
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