From: Adrian Hunter <adrian.hunter@intel.com>
To: Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Peter Zijlstra <peterz@infradead.org>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>,
kvm@vger.kernel.org, Shuah Khan <shuah@kernel.org>,
linux-kselftest@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, H Peter Anvin <hpa@zytor.com>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
Ian Rogers <irogers@google.com>,
Kan Liang <kan.liang@linux.intel.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
mizhang@google.com
Subject: Re: [PATCH 0/3] KVM: x86: Fix Intel PT Host/Guest mode when host tracing also
Date: Fri, 4 Oct 2024 19:59:50 +0300 [thread overview]
Message-ID: <ddf6960c-a48a-48df-b09d-f70797042413@intel.com> (raw)
In-Reply-To: <b2671dab-9efa-4a56-bbe4-9b9140708120@intel.com>
On 26/09/24 17:05, Adrian Hunter wrote:
> On 6/09/24 16:00, Adrian Hunter wrote:
>> Hi
>>
>> There is a long-standing problem whereby running Intel PT on host and guest
>> in Host/Guest mode, causes VM-Entry failure.
>>
>> The motivation for this patch set is to provide a fix for stable kernels
>> prior to the advent of the "Mediated Passthrough vPMU" patch set:
>>
>> https://lore.kernel.org/kvm/20240801045907.4010984-1-mizhang@google.com/
>>
>> which would render a large part of the fix unnecessary but likely not be
>> suitable for backport to stable due to its size and complexity.
>>
>> Ideally, this patch set would be applied before "Mediated Passthrough vPMU"
>>
>> Note that the fix does not conflict with "Mediated Passthrough vPMU", it
>> is just that "Mediated Passthrough vPMU" will make the code to stop and
>> restart Intel PT unnecessary.
>
> Any comments?
Any comments?
>
>>
>>
>> Adrian Hunter (3):
>> KVM: x86: Fix Intel PT IA32_RTIT_CTL MSR validation
>> KVM: x86: Fix Intel PT Host/Guest mode when host tracing also
>> KVM: selftests: Add guest Intel PT test
>>
>> arch/x86/events/intel/pt.c | 131 ++++++-
>> arch/x86/events/intel/pt.h | 10 +
>> arch/x86/include/asm/intel_pt.h | 4 +
>> arch/x86/kvm/vmx/vmx.c | 26 +-
>> arch/x86/kvm/vmx/vmx.h | 1 -
>> tools/testing/selftests/kvm/Makefile | 1 +
>> .../selftests/kvm/include/x86_64/processor.h | 1 +
>> tools/testing/selftests/kvm/x86_64/intel_pt.c | 381 +++++++++++++++++++++
>> 8 files changed, 532 insertions(+), 23 deletions(-)
>> create mode 100644 tools/testing/selftests/kvm/x86_64/intel_pt.c
>>
>> base-commit: d45aab436cf06544abeeffc607110f559a3af3b4
>>
>>
>> Regards
>> Adrian
>
prev parent reply other threads:[~2024-10-04 17:00 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-06 13:00 [PATCH 0/3] KVM: x86: Fix Intel PT Host/Guest mode when host tracing also Adrian Hunter
2024-09-06 13:00 ` [PATCH 1/3] KVM: x86: Fix Intel PT IA32_RTIT_CTL MSR validation Adrian Hunter
2024-09-06 13:00 ` [PATCH 2/3] KVM: x86: Fix Intel PT Host/Guest mode when host tracing also Adrian Hunter
2024-09-06 13:00 ` [PATCH 3/3] KVM: selftests: Add guest Intel PT test Adrian Hunter
2024-09-10 6:02 ` [PATCH 0/3] KVM: x86: Fix Intel PT Host/Guest mode when host tracing also Zhenyu Wang
2024-09-26 14:05 ` Adrian Hunter
2024-10-04 16:59 ` Adrian Hunter [this message]
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=ddf6960c-a48a-48df-b09d-f70797042413@intel.com \
--to=adrian.hunter@intel.com \
--cc=acme@kernel.org \
--cc=alexander.shishkin@linux.intel.com \
--cc=bp@alien8.de \
--cc=dave.hansen@linux.intel.com \
--cc=hpa@zytor.com \
--cc=irogers@google.com \
--cc=jolsa@kernel.org \
--cc=kan.liang@linux.intel.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=linux-perf-users@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=mingo@redhat.com \
--cc=mizhang@google.com \
--cc=namhyung@kernel.org \
--cc=pbonzini@redhat.com \
--cc=peterz@infradead.org \
--cc=seanjc@google.com \
--cc=shuah@kernel.org \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
--cc=zhenyuw@linux.intel.com \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.