diff options
| author | Mathieu Poirier <mathieu.poirier@linaro.org> | 2019-03-30 16:45:01 -0600 |
|---|---|---|
| committer | Mathieu Poirier <mathieu.poirier@linaro.org> | 2019-04-03 04:17:30 -0600 |
| commit | 3f2df3026227cc17c89e5039e9e7f2fa45599c62 (patch) | |
| tree | 6d053ec5c19e945e4c4f9916434f55bf73e21055 | |
| parent | f20291533b0871b6dd890802cd21216e2413f96d (diff) | |
coresight: tmc-etr: Introduce the notion of process ID to ETR devices
In preparation to support CPU-wide trace scenarios, introduce the notion
of process ID to ETR devices. That way events monitoring the same process
can use the same etr_buf, allowing multiple CPUs to use the same sink.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
| -rw-r--r-- | drivers/hwtracing/coresight/coresight-tmc-etr.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/hwtracing/coresight/coresight-tmc-etr.c b/drivers/hwtracing/coresight/coresight-tmc-etr.c index ac1efdfc0d07..e1774d4bb5f3 100644 --- a/drivers/hwtracing/coresight/coresight-tmc-etr.c +++ b/drivers/hwtracing/coresight/coresight-tmc-etr.c @@ -9,6 +9,7 @@ #include <linux/dma-mapping.h> #include <linux/iommu.h> #include <linux/slab.h> +#include <linux/types.h> #include <linux/vmalloc.h> #include "coresight-catu.h" #include "coresight-etm-perf.h" @@ -25,6 +26,7 @@ struct etr_flat_buf { /* * etr_perf_buffer - Perf buffer used for ETR * @etr_buf - Actual buffer used by the ETR + * @pid - The PID this etr_perf_buffer belongs to. * @snaphost - Perf session mode * @head - handle->head at the beginning of the session. * @nr_pages - Number of pages in the ring buffer. @@ -32,6 +34,7 @@ struct etr_flat_buf { */ struct etr_perf_buffer { struct etr_buf *etr_buf; + pid_t pid; bool snapshot; unsigned long head; int nr_pages; @@ -1276,6 +1279,7 @@ static void *tmc_alloc_etr_buffer(struct coresight_device *csdev, return NULL; } + etr_perf->pid = task_pid_nr(event->owner); etr_perf->snapshot = snapshot; etr_perf->nr_pages = nr_pages; etr_perf->pages = pages; |