[PATCH V6 0/2] powerpc/perf: Add support for perf extended regs in powerpc

[Athira Rajeev]

Patch set to add support for perf extended register capability in
powerpc. The capability flag PERF_PMU_CAP_EXTENDED_REGS, is used to
indicate the PMU which support extended registers. The generic code
define the mask of extended registers as 0 for non supported architectures.

patch 1/2 defines the PERF_PMU_CAP_EXTENDED_REGS mask to output the
values of mmcr0,mmcr1,mmcr2 for POWER9. Defines `PERF_REG_EXTENDED_MASK`
at runtime which contains mask value of the supported registers under
extended regs.

patch 2/2 adds the extended regs support for power10 and exposes
MMCR3, SIER2, SIER3 registers as part of extended regs.

This patch series is based on powerpc/next and includes the kernel
side changes to support extended regs. perf tools side changes will
be sent as separate patchset.

Changelog:
Changes from v5 -> v6
- Split kernel changes to one patchset as suggested by
  Arnaldo
  Link to previous series:
  https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=192624

Changes from v4 -> v5
- initialize `perf_reg_extended_max` to work on
  all platforms as suggested by Ravi Bangoria
- Added Reviewed-and-Tested-by from Ravi Bangoria

Changes from v3 -> v4
- Split the series and send extended regs as separate patch set here.
  Link to previous series :
  https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=190462&state=*
  Other PMU patches are already merged in powerpc/next.

- Fixed kernel build issue when using config having
  CONFIG_PERF_EVENTS set and without CONFIG_PPC_PERF_CTRS
  reported by kernel build bot.
- Included Reviewed-by from Kajol Jain.
- Addressed review comments from Ravi Bangoria to initialize `perf_reg_extended_max`
  and define it in lowercase since it is local variable.

Anju T Sudhakar (1):
  powerpc/perf: Add support for outputting extended regs in perf
    intr_regs

Athira Rajeev (1):
  powerpc/perf: Add extended regs support for power10 platform

 arch/powerpc/include/asm/perf_event.h        |  3 ++
 arch/powerpc/include/asm/perf_event_server.h |  5 ++++
 arch/powerpc/include/uapi/asm/perf_regs.h    | 20 ++++++++++++-
 arch/powerpc/perf/core-book3s.c              |  1 +
 arch/powerpc/perf/perf_regs.c                | 44 ++++++++++++++++++++++++++--
 arch/powerpc/perf/power10-pmu.c              |  6 ++++
 arch/powerpc/perf/power9-pmu.c               |  6 ++++
 7 files changed, 81 insertions(+), 4 deletions(-)

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1.8.3.1