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 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).