[v2,0/4] KVM: x86/pmu: Refactoring code by reusing pmc->eventsel for fixed_counters

Message

Like Xu Nov. 19, 2021, 6:48 a.m. UTC

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/[e-mail]/T/#t

[1] https://lore.kernel.org/kvm/[e-mail]/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(-)