linux-kernel - [PATCH 0/6] Extend pmu_counters

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Message-ID: <20240813164244.751597-1-coltonlewis@google.com>
Date: Tue, 13 Aug 2024 16:42:38 +0000
From: Colton Lewis <coltonlewis@...gle.com>
To: kvm@...r.kernel.org
Cc: Mingwei Zhang <mizhang@...gle.com>, Jinrong Liang <ljr.kernel@...il.com>, 
	Jim Mattson <jmattson@...gle.com>, Aaron Lewis <aaronlewis@...gle.com>, 
	Sean Christopherson <seanjc@...gle.com>, Paolo Bonzini <pbonzini@...hat.com>, Shuah Khan <shuah@...nel.org>, 
	linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Colton Lewis <coltonlewis@...gle.com>
Subject: [PATCH 0/6] Extend pmu_counters_test to AMD CPUs

(I was positive I had sent this already, but I couldn't find it on the
mailing list to reply to and ask for reviews.)

Extend pmu_counters_test to AMD CPUs.

As the AMD PMU is quite different from Intel with different events and
feature sets, this series introduces a new code path to test it,
specifically focusing on the core counters including the
PerfCtrExtCore and PerfMonV2 features. Northbridge counters and cache
counters exist, but are not as important and can be deferred to a
later series.

The first patch is a bug fix that could be submitted separately.

The series has been tested on both Intel and AMD machines, but I have
not found an AMD machine old enough to lack PerfCtrExtCore. I have
made efforts that no part of the code has any dependency on its
presence.

I am aware of similar work in this direction done by Jinrong Liang
[1]. He told me he is not working on it currently and I am not
intruding by making my own submission.

[1] https://lore.kernel.org/kvm/20231121115457.76269-1-cloudliang@tencent.com/

Colton Lewis (6):
  KVM: x86: selftests: Fix typos in macro variable use
  KVM: x86: selftests: Define AMD PMU CPUID leaves
  KVM: x86: selftests: Set up AMD VM in pmu_counters_test
  KVM: x86: selftests: Test read/write core counters
  KVM: x86: selftests: Test core events
  KVM: x86: selftests: Test PerfMonV2

 .../selftests/kvm/include/x86_64/processor.h  |   7 +
 .../selftests/kvm/x86_64/pmu_counters_test.c  | 267 ++++++++++++++++--
 2 files changed, 249 insertions(+), 25 deletions(-)

--
2.46.0.76.ge559c4bf1a-goog