perf cs-etm: Flush thread stacks after decoder reset

Perf resets the CoreSight decoder when moving to a new AUX trace buffer,
this causes trace discontinunity globally.

For callchain synthesis, keeping thread-stack state after decoder reset
can leave stale call/return history attached to threads that are decoded
later, producing incorrect synthesized callchains.

Flush all host thread stacks after a decoder reset. When virtualization
is present, flush the guest thread stacks as well.

Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Leo Yan <leo.yan@arm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

0 files changed, 0 insertions, 0 deletions