linux-kernel - [GIT PULL] Final KVM fix for Linux 6.7

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Date: Thu,  4 Jan 2024 16:48:44 +0100
From: Paolo Bonzini <pbonzini@...hat.com>
To: torvalds@...ux-foundation.org
Cc: linux-kernel@...r.kernel.org,
	kvm@...r.kernel.org,
	peterz@...radead.org,
	paulmck@...nel.org
Subject: [GIT PULL] Final KVM fix for Linux 6.7

Linus,

The following changes since commit ac865f00af293d081356bec56eea90815094a60e:

  Merge tag 'pci-v6.7-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci (2024-01-03 14:18:57 -0800)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/virt/kvm/kvm.git tags/for-linus

for you to fetch changes up to 971079464001c6856186ca137778e534d983174a:

  KVM: x86/pmu: fix masking logic for MSR_CORE_PERF_GLOBAL_CTRL (2024-01-04 16:31:27 +0100)

This is technically not a KVM patch, but I am sending it anyway considering that:

- the patch is doing nothing but undoing a Boolean logic brain fart, restoring
  the pre-6.0 logic

- the function is literally called intel_guest_get_msrs and I am touching only
  the "guest" field, so the non-KVM effects are clearly nil

- this part of the file is often marked as "KVM" in the commit summaries, and
  sent via the KVM tree with Acked-by (usually from PeterZ, whom I am CCing)

- we are pretty close to the release but many people are still in Christmas
  vacation mode/mood

- the bug is not theoretical, Paul described the reproducer as triggering
  "rarely but intolerably often"

- writing this explanation almost took more time than writing the patch,
  thus proving that I reaallyy would like this in 6.7

Thanks,

Paolo

----------------------------------------------------------------
* Fix Boolean logic in intel_guest_get_msrs

----------------------------------------------------------------
Paolo Bonzini (1):
      KVM: x86/pmu: fix masking logic for MSR_CORE_PERF_GLOBAL_CTRL

 arch/x86/events/intel/core.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)