Re: [PATCH v3 1/4] perf: cs-etm: Don't add global v0 HW_IDs to unformatted queues

[Leo Yan]

On Fri, Oct 02, 2026 at 12:15:11PM +0100, James Clark wrote:
> In the case of mixed formatted and unformatted trace with v0 HW_IDs, or
> no HW_IDs at all resulting in the cs_etm__map_trace_ids_metadata()
> fallback, formatted queues will write their HW_IDs to unformatted
> queues. This will result in an assert because of multiple decoders on an
> unformatted queue.
> 
> Fix it by not inserting trace ID nodes on other unformatted queues. This
> isn't an issue for v0.1 HW_IDs because they aren't global so will only
> add to their own queue.
> 
> Fixes: 19c3e4db38c5 ("perf: cs-etm: Create decoders based on the trace ID mappings")
> Signed-off-by: James Clark <james.clark@xxxxxxxxxx>

Reviewed-by: Leo Yan <leo.yan@xxxxxxx>