linux-kernel - Re: [PATCH v3 0/5] KVM: selftests: aarch64: Introduce pmu_event_filter

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Date: Wed, 31 Jan 2024 11:11:28 +0800
From: Shaoqin Huang <shahuang@...hat.com>
To: Eric Auger <eauger@...hat.com>, Oliver Upton <oliver.upton@...ux.dev>,
 Marc Zyngier <maz@...nel.org>, kvmarm@...ts.linux.dev
Cc: James Morse <james.morse@....com>, kvm@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
 linux-kselftest@...r.kernel.org, Paolo Bonzini <pbonzini@...hat.com>,
 Shuah Khan <shuah@...nel.org>, Suzuki K Poulose <suzuki.poulose@....com>,
 Zenghui Yu <yuzenghui@...wei.com>
Subject: Re: [PATCH v3 0/5] KVM: selftests: aarch64: Introduce
 pmu_event_filter_test

Hi Eric,

On 1/26/24 18:25, Eric Auger wrote:
> Hi Shaoqin,
> 
> On 1/16/24 07:01, Shaoqin Huang wrote:
>> The test is inspired by the pmu_event_filter_test which implemented by x86. On
>> the arm64 platform, there is the same ability to set the pmu_event_filter
>> through the KVM_ARM_VCPU_PMU_V3_FILTER attribute. So add the test for arm64.
>>
>> The series first move some pmu common code from vpmu_counter_access to
>> lib/aarch64/vpmu.c and include/aarch64/vpmu.h, which can be used by
>> pmu_event_filter_test. Then fix a bug related to the [enable|disable]_counter,
>> and at last, implement the test itself.
> which branch does it apply on? I fail to apply on top on main.
> 
> Or can you provide a branch?

This was based on v6.7.

> 
> Eric
>>
>> Changelog:
>> ----------
>> v2->v3:
>>    - Check the pmceid in guest code instead of pmu event count since different
>>    hardware may have different event count result, check pmceid makes it stable
>>    on different platform.                        [Eric]
>>    - Some typo fixed and commit message improved.
>>
>> v1->v2:
>>    - Improve the commit message.                 [Eric]
>>    - Fix the bug in [enable|disable]_counter.    [Raghavendra & Marc]
>>    - Add the check if kvm has attr KVM_ARM_VCPU_PMU_V3_FILTER.
>>    - Add if host pmu support the test event throught pmceid0.
>>    - Split the test_invalid_filter() to another patch. [Eric]
>>
>> v1: https://lore.kernel.org/all/20231123063750.2176250-1-shahuang@redhat.com/
>> v2: https://lore.kernel.org/all/20231129072712.2667337-1-shahuang@redhat.com/
>>
>> Shaoqin Huang (5):
>>    KVM: selftests: aarch64: Make the [create|destroy]_vpmu_vm() public
>>    KVM: selftests: aarch64: Move pmu helper functions into vpmu.h
>>    KVM: selftests: aarch64: Fix the buggy [enable|disable]_counter
>>    KVM: selftests: aarch64: Introduce pmu_event_filter_test
>>    KVM: selftests: aarch64: Add invalid filter test in
>>      pmu_event_filter_test
>>
>>   tools/testing/selftests/kvm/Makefile          |   2 +
>>   .../kvm/aarch64/pmu_event_filter_test.c       | 255 ++++++++++++++++++
>>   .../kvm/aarch64/vpmu_counter_access.c         | 218 ++-------------
>>   .../selftests/kvm/include/aarch64/vpmu.h      | 135 ++++++++++
>>   .../testing/selftests/kvm/lib/aarch64/vpmu.c  |  74 +++++
>>   5 files changed, 490 insertions(+), 194 deletions(-)
>>   create mode 100644 tools/testing/selftests/kvm/aarch64/pmu_event_filter_test.c
>>   create mode 100644 tools/testing/selftests/kvm/include/aarch64/vpmu.h
>>   create mode 100644 tools/testing/selftests/kvm/lib/aarch64/vpmu.c
>>
> 

-- 
Shaoqin