perf cs-etm: Track exception level

Currently we assume all trace belongs to the host machine so when
the decoder should be looking at the guest kernel maps it can crash
because it looks at the host ones instead.

Avoid one scenario (guest kernel running at EL1) by assigning the
default guest machine to this trace. For userspace trace it's still not
possible to determine guest vs host, but the PIDs should help in this
case.

Committer notes:

Fixed up conflict with:

  perf addr_location: Add init/exit/copy functions

That was only on tmp.perf-tools-next.

Reviewed-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: James Clark <james.clark@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230612111403.100613-5-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/tools/perf/util/cs-etm.h b/tools/perf/util/cs-etm.h
index 2f47f4ec5b27..7cca37887917 100644
--- a/tools/perf/util/cs-etm.h
+++ b/tools/perf/util/cs-etm.h
@@ -251,10 +251,11 @@ enum cs_etm_pid_fmt {
 };
 
 #ifdef HAVE_CSTRACE_SUPPORT
+#include <opencsd/ocsd_if_types.h>
 int cs_etm__get_cpu(u8 trace_chan_id, int *cpu);
-enum pid_fmt cs_etm__get_pid_fmt(struct cs_etm_queue *etmq);
-int cs_etm__etmq_set_tid(struct cs_etm_queue *etmq,
-			 pid_t tid, u8 trace_chan_id);
+enum cs_etm_pid_fmt cs_etm__get_pid_fmt(struct cs_etm_queue *etmq);
+int cs_etm__etmq_set_tid_el(struct cs_etm_queue *etmq, pid_t tid,
+			    u8 trace_chan_id, ocsd_ex_level el);
 bool cs_etm__etmq_is_timeless(struct cs_etm_queue *etmq);
 void cs_etm__etmq_set_traceid_queue_timestamp(struct cs_etm_queue *etmq,
 					      u8 trace_chan_id);