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/
v2: * Test all combinations of VM setup rather than only the maximum allowed by hardware * Add fixes tag to bug fix in patch 1 * Refine some names
v1: https://lore.kernel.org/kvm/20240813164244.751597-1-coltonlewis@google.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 | 304 ++++++++++++++++-- 2 files changed, 277 insertions(+), 34 deletions(-)
base-commit: da3ea35007d0af457a0afc87e84fddaebc4e0b63 -- 2.46.0.662.g92d0881bb0-goog