linux-kernel - [PATCH v2 0/4] KVM: x86/pmu: Refactoring code by reusing pmc->eventsel for fixed

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Date:   Fri, 19 Nov 2021 14:48:52 +0800
From:   Like Xu <like.xu.linux@...il.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/4] KVM: x86/pmu: Refactoring code by reusing pmc->eventsel for fixed_counters

Hi,

This patch set is essentially triggered by Jim's patch set[1]
(especially patch 01 and 04).

The new idea to set up and maintain pmc->eventsel for fixed counters.
This would unify all fixed/gp code logic based on the same semantics
"pmc->eventsel". (I demonstrated this in patch 01-03, more can be done)

v1 -> v2 Changelog:
- Rename find_perf_hw_id() to pmc_perf_hw_id(); [Paolo]
- Add WARN_ON for amd_pmc_perf_hw_id(); [Paolo]
- Add pmc->intr to drop dummy need_overflow_intr(pmc); [Paolo]

Previous:
https://lore.kernel.org/kvm/20211116122030.4698-1-likexu@tencent.com/T/#t

[1] https://lore.kernel.org/kvm/96170437-1e00-7841-260e-39d181e7886d@gmail.com/T/#t

Please check each commit message for more details
and let me know if there is any room for improvement,

Thanks.

Like Xu (4):
  KVM: x86/pmu: Setup pmc->eventsel for fixed PMCs
  KVM: x86/pmu: Refactoring find_arch_event() to pmc_perf_hw_id()
  KVM: x86/pmu: Reuse pmc_perf_hw_id() and drop find_fixed_event()
  KVM: x86/pmu: Add pmc->intr to refactor kvm_perf_overflow{_intr}()

 arch/x86/include/asm/kvm_host.h |  1 +
 arch/x86/kvm/pmu.c              | 58 +++++++++++++--------------------
 arch/x86/kvm/pmu.h              |  4 +--
 arch/x86/kvm/svm/pmu.c          | 19 +++++------
 arch/x86/kvm/vmx/pmu_intel.c    | 54 ++++++++++++++++++++----------
 5 files changed, 69 insertions(+), 67 deletions(-)

-- 
2.33.1