Re: [PATCH v4 1/3] perf alpha: Decode ProfileMe raw samples

[sashiko-bot@kernel.org]

> The Alpha cpu PMU attaches struct alpha_profileme_sample to each
> ProfileMe sample as PERF_SAMPLE_RAW data: the profiled instruction's
> PMPC along with the I_STAT and PCTR_CTL status that says what happened
> to it.
> 
> Decode it in perf report -D and perf script -D the way AMD IBS raw data
> is decoded, naming the trap from TRAP_TYPE when TRP is set and from the
> PALcode entry offset in PMPC for redirect traps, which TRAP_TYPE does
> not report. TRP is ignored for an instruction killed before it was
> mapped, as an EV7 leaves it stale there. The payload is copied out of
> the sample and converted from little endian, so that it decodes on
> strict-alignment and big-endian hosts too.
> 
> Copy the uapi header that defines the struct into tools/arch and add it
> to check-headers.sh.
> 
> Signed-off-by: Matt Turner <mattst88@gmail.com>

Sashiko has reviewed this patch and found no issues.

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Sashiko AI review · https://sashiko.dev/#/patchset/20261104-perf-alpha-profileme-v4-0-1771ea02950e@gmail.com?part=1