linux-kernel - [GIT PULL] KVM: x86: PMU fixes for 6.6

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Message-ID: <20231013234808.1115781-1-seanjc@google.com>
Date:   Fri, 13 Oct 2023 16:48:07 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sean Christopherson <seanjc@...gle.com>
Subject: [GIT PULL] KVM: x86: PMU fixes for 6.6

Please pull three PMU fixes for 6.6.  These aren't super urgent and have all
existed from some time, i.e. don't absolutely need to go into 6.6, but I also
don't see a good reason to hold them back (they're all tagged for stable, so
it's kind of a moot point).

The following changes since commit 5804c19b80bf625c6a9925317f845e497434d6d3:

  Merge tag 'kvm-riscv-fixes-6.6-1' of https://github.com/kvm-riscv/linux into HEAD (2023-09-23 05:35:55 -0400)

are available in the Git repository at:

  https://github.com/kvm-x86/linux.git tags/kvm-x86-pmu-6.6-fixes

for you to fetch changes up to 73554b29bd70546c1a9efc9c160641ef1b849358:

  KVM: x86/pmu: Synthesize at most one PMI per VM-exit (2023-09-25 14:42:52 -0700)

----------------------------------------------------------------
KVM x86/pmu fixes for 6.6:

 - Truncate writes to PMU counters to the counter's width to avoid spurious
   overflows when emulating counter events in software.

 - Set the LVTPC entry mask bit when handling a PMI (to match Intel-defined
   architectural behavior).

 - Treat KVM_REQ_PMI as a wake event instead of queueing host IRQ work to
   kick the guest out of emulated halt.

----------------------------------------------------------------
Jim Mattson (2):
      KVM: x86: Mask LVTPC when handling a PMI
      KVM: x86/pmu: Synthesize at most one PMI per VM-exit

Roman Kagan (1):
      KVM: x86/pmu: Truncate counter value to allowed width on write

 arch/x86/include/asm/kvm_host.h |  1 -
 arch/x86/kvm/lapic.c            |  8 ++++++--
 arch/x86/kvm/pmu.c              | 27 +--------------------------
 arch/x86/kvm/pmu.h              |  6 ++++++
 arch/x86/kvm/svm/pmu.c          |  2 +-
 arch/x86/kvm/vmx/pmu_intel.c    |  4 ++--
 arch/x86/kvm/x86.c              |  3 +++
 7 files changed, 19 insertions(+), 32 deletions(-)