From: David Edmondson <david.edmondson@oracle.com>
To: linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Joerg Roedel <joro@8bytes.org>, Ingo Molnar <mingo@redhat.com>,
Jim Mattson <jmattson@google.com>,
kvm@vger.kernel.org, Borislav Petkov <bp@alien8.de>,
David Matlack <dmatlack@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
"H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org, Wanpeng Li <wanpengli@tencent.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Sean Christopherson <seanjc@google.com>,
David Edmondson <david.edmondson@oracle.com>
Subject: [PATCH v3 0/3] kvm: x86: Convey the exit reason, etc. to user-space on emulation failure
Date: Thu, 29 Jul 2021 14:39:28 +0100 [thread overview]
Message-ID: <20210729133931.1129696-1-david.edmondson@oracle.com> (raw)
To help when debugging failures in the field, if instruction emulation
fails, report the VM exit reason to userspace in order that it can be
recorded.
Sean: hopefully this is something like what you intended. If not,
please clarify and I will have another go. The lack of an ABI for the
debug data does feel messy.
The SGX changes here are compiled but untested.
v3:
- Convey any debug data un-flagged after the ABI specified data in
struct emulation_failure (Sean)
- Obey the ABI protocol in sgx_handle_emulation_failure() (Sean)
v2:
- Improve patch comments (dmatlock)
- Intel should provide the full exit reason (dmatlock)
- Pass a boolean rather than flags (dmatlock)
- Use the helper in kvm_task_switch() and kvm_handle_memory_failure()
(dmatlock)
- Describe the exit_reason field of the emulation_failure structure
(dmatlock)
David Edmondson (3):
KVM: x86: kvm_x86_ops.get_exit_info should include the exit reason
KVM: x86: On emulation failure, convey the exit reason, etc. to
userspace
KVM: x86: SGX must obey the KVM_INTERNAL_ERROR_EMULATION protocol
arch/x86/include/asm/kvm_host.h | 12 ++++++--
arch/x86/kvm/svm/svm.c | 8 +++--
arch/x86/kvm/trace.h | 11 +++----
arch/x86/kvm/vmx/nested.c | 2 +-
arch/x86/kvm/vmx/sgx.c | 8 ++---
arch/x86/kvm/vmx/vmx.c | 11 ++++---
arch/x86/kvm/x86.c | 53 ++++++++++++++++++++++++++-------
include/uapi/linux/kvm.h | 7 +++++
8 files changed, 79 insertions(+), 33 deletions(-)
--
2.30.2
next reply other threads:[~2021-07-29 13:46 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-29 13:39 David Edmondson [this message]
2021-07-29 13:39 ` [PATCH v3 1/3] KVM: x86: kvm_x86_ops.get_exit_info should include the exit reason David Edmondson
2021-07-29 22:27 ` Sean Christopherson
2021-07-30 7:29 ` David Edmondson
2021-07-29 13:39 ` [PATCH v3 2/3] KVM: x86: On emulation failure, convey the exit reason, etc. to userspace David Edmondson
2021-07-30 22:14 ` Sean Christopherson
2021-08-02 7:28 ` David Edmondson
2021-08-02 16:58 ` Sean Christopherson
2021-08-02 17:23 ` David Edmondson
2021-08-07 0:59 ` Sean Christopherson
2021-07-29 13:39 ` [PATCH v3 3/3] KVM: x86: SGX must obey the KVM_INTERNAL_ERROR_EMULATION protocol David Edmondson
2021-07-30 22:17 ` Sean Christopherson
2021-08-02 7:18 ` David Edmondson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210729133931.1129696-1-david.edmondson@oracle.com \
--to=david.edmondson@oracle.com \
--cc=bp@alien8.de \
--cc=dmatlack@google.com \
--cc=hpa@zytor.com \
--cc=jmattson@google.com \
--cc=joro@8bytes.org \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=pbonzini@redhat.com \
--cc=seanjc@google.com \
--cc=tglx@linutronix.de \
--cc=vkuznets@redhat.com \
--cc=wanpengli@tencent.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).