Re: [PATCH 0/2] powerpc/perf: Add instruction and data address registers to extended regs

On 20/06/21 8:15 pm, Athira Rajeev wrote:

Patch set adds PMU registers namely Sampled Instruction Address Register
(SIAR) and Sampled Data Address Register (SDAR) as part of extended regs
in PowerPC. These registers provides the instruction/data address and
adding these to extended regs helps in debug purposes.

Patch 1/2 adds SIAR and SDAR as part of the extended regs mask.
Patch 2/2 includes perf tools side changes to add the SPRs to
sample_reg_mask to use with -I? option.

Athira Rajeev (2):
   powerpc/perf: Expose instruction and data address registers as part of
     extended regs
   tools/perf: Add perf tools support to expose instruction and data
     address registers as part of extended regs

Tested with the following scenarios on P9, P10 - PowerVM environment
1. perf record -I? - shows added - sdar, siar
2. perf record -I <workload> and perf report -D - shows added - sdar, siar with and with out counts.

Tested-by: Nageswara R Sastry <redacted>

  arch/powerpc/include/uapi/asm/perf_regs.h       | 12 +++++++-----
  arch/powerpc/perf/perf_regs.c                   |  4 ++++
  tools/arch/powerpc/include/uapi/asm/perf_regs.h | 12 +++++++-----
  tools/perf/arch/powerpc/include/perf_regs.h     |  2 ++
  tools/perf/arch/powerpc/util/perf_regs.c        |  2 ++
  5 files changed, 22 insertions(+), 10 deletions(-)

-- 
Thanks and Regards
R.Nageswara Sastry