• Leo Yan's avatar
    perf report: Set PERF_SAMPLE_DATA_SRC bit for Arm SPE event · ccb17cae
    Leo Yan authored
    Since commit bb30acae ("perf report: Bail out --mem-mode if mem
    info is not available") "perf mem report" and "perf report --mem-mode"
    don't report result if the PERF_SAMPLE_DATA_SRC bit is missed in sample
    type.
    
    The commit ffab4870 ("perf: arm-spe: Fix perf report
    --mem-mode") partially fixes the issue.  It adds PERF_SAMPLE_DATA_SRC
    bit for Arm SPE event, this allows the perf data file generated by
    kernel v5.18-rc1 or later version can be reported properly.
    
    On the other hand, perf tool still fails to be backward compatibility
    for a data file recorded by an older version's perf which contains Arm
    SPE trace data.  This patch is a workaround in reporting phase, when
    detects ARM SPE PMU event and without PERF_SAMPLE_DATA_SRC bit, it will
    force to set the bit in the sample type and give a warning info.
    
    Fixes: bb30acae ("perf report: Bail out --mem-mode if mem info is not available")
    Reviewed-by: default avatarJames Clark <james.clark@arm.com>
    Signed-off-by: default avatarLeo Yan <leo.yan@linaro.org>
    Tested-by: default avatarGerman Gomez <german.gomez@arm.com>
    Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Mark Rutland <mark.rutland@arm.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
    Link: https://lore.kernel.org/r/20220414123201.842754-1-leo.yan@linaro.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    ccb17cae
builtin-report.c 46.8 KB