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.
Patches 1 and 2 are the kernel side changes needed to include base support for extended regs in powerpc and in power10. Patches 3 and 4 are the perf tools side changes needed to support the extended registers. patch 1/4 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 2/4 adds the extended regs support for power10 and exposes MMCR3, SIER2, SIER3 registers as part of extended regs. Patch 3/4 and 4/4 adds extended regs to sample_reg_mask in the tool side to use with `-I?` option for power9 and power10 respectively. Ravi bangoria found an issue with `perf record -I` while testing the changes. The same issue is currently being worked on here: https://lkml.org/lkml/2020/7/19/413 and will be resolved once fix from Jin Yao is merged. This patch series is based on powerpc/next Changelog: 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 (2): powerpc/perf: Add support for outputting extended regs in perf intr_regs tools/perf: Add perf tools support for extended register capability in powerpc Athira Rajeev (2): powerpc/perf: Add extended regs support for power10 platform tools/perf: Add perf tools support for extended regs in power10 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 +++ tools/arch/powerpc/include/uapi/asm/perf_regs.h | 20 ++++++++- tools/perf/arch/powerpc/include/perf_regs.h | 8 +++- tools/perf/arch/powerpc/util/header.c | 9 +--- tools/perf/arch/powerpc/util/perf_regs.c | 55 +++++++++++++++++++++++++ tools/perf/arch/powerpc/util/utils_header.h | 15 +++++++ 12 files changed, 178 insertions(+), 14 deletions(-) create mode 100644 tools/perf/arch/powerpc/util/utils_header.h -- 1.8.3.1
