[PATCH v4 RESEND 0/5] x86: The perf/x86 changes to support guest Arch LBR

[Like Xu]

Hi Peter,

Please help review these minor perf/x86 changes in this patch set,
and we need some of them to support Guest Architectural LBR in KVM.

If you are interested in the KVM emulation, please check
https://lore.kernel.org/kvm/20210314155225.206661-1-like.xu@xxxxxxxxxxxxxxx/

Please check more details in each commit and feel free to comment.

Like Xu (5):
  perf/x86/intel: Fix the comment about guest LBR support on KVM
  perf/x86/lbr: Simplify the exposure check for the LBR_INFO registers
  perf/x86/lbr: Move cpuc->lbr_xsave allocation out of sleeping region
  perf/x86/lbr: Skip checking for the existence of LBR_TOS for Arch LBR
  perf/x86: Move ARCH_LBR_CTL_MASK definition to include/asm/msr-index.h

 arch/x86/events/core.c           |  8 +++++---
 arch/x86/events/intel/bts.c      |  2 +-
 arch/x86/events/intel/core.c     |  6 +++---
 arch/x86/events/intel/lbr.c      | 28 +++++++++++++++++-----------
 arch/x86/events/perf_event.h     |  8 +++++++-
 arch/x86/include/asm/msr-index.h |  1 +
 6 files changed, 34 insertions(+), 19 deletions(-)

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2.29.2