Messages in this thread | | | Subject | Re: [PATCH v2 2/9] perf cs-etm: Initialise architecture based on TRCIDR1 | From | Suzuki K Poulose <> | Date | Fri, 3 Sep 2021 09:55:37 +0100 |
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On 06/08/2021 14:41, James Clark wrote: > Currently the architecture is hard coded as ARCH_V8, but from ETMv4.4 > onwards this should be ARCH_AA64. > > Signed-off-by: James Clark <james.clark@arm.com> > --- > tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 16 +++++++++++++++- > 1 file changed, 15 insertions(+), 1 deletion(-) > > diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c > index 187c038caa19..787b19642e78 100644 > --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c > +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c > @@ -126,6 +126,20 @@ static int cs_etm_decoder__gen_etmv3_config(struct cs_etm_trace_params *params, > return 0; > } > > +#define TRCIDR1_TRCARCHMIN_SHIFT 4 > +#define TRCIDR1_TRCARCHMIN_MASK GENMASK(7, 4) > +#define TRCIDR1_TRCARCHMIN(x) (((x) & TRCIDR1_TRCARCHMIN_MASK) >> TRCIDR1_TRCARCHMIN_SHIFT)
minor nit: Please add a blank line here
> +static enum _ocsd_arch_version cs_etm_decoder__get_etmv4_arch_ver(u32 reg_idr1) > +{ > + /* > + * For ETMv4 if the trace minor version is 4 or more then we can assume > + * the architecture is ARCH_AA64 rather than just V8. > + * ARCH_V8 = V8 architecture > + * ARCH_AA64 = Min v8r3 plus additional AA64 PE features
Does this need to be >= 3 then, to be accurate ?
The comment "reads", minimum v8.3 and any additional features.
Otherwise looks good to me.
Suzuki
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