perf/aux: Make perf_event accessible to setup_aux()

When pmu::setup_aux() is called the coresight PMU needs to know which
sink to use for the session by looking up the information in the
event's attr::config2 field.

As such simply replace the cpu information by the complete perf_event
structure and change all affected customers.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Reviewed-by: Suzuki Poulouse <suzuki.poulose@arm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-s390@vger.kernel.org
Link: http://lkml.kernel.org/r/20190131184714.20388-2-mathieu.poirier@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Mathieu Poirier 2019-01-31 11:47:08 -07:00 committed by Arnaldo Carvalho de Melo
parent ebc52aee61
commit 840018668c
7 changed files with 17 additions and 14 deletions

View File

@ -1600,7 +1600,7 @@ static void aux_sdb_init(unsigned long sdb)
/*
* aux_buffer_setup() - Setup AUX buffer for diagnostic mode sampling
* @cpu: On which to allocate, -1 means current
* @event: Event the buffer is setup for, event->cpu == -1 means current
* @pages: Array of pointers to buffer pages passed from perf core
* @nr_pages: Total pages
* @snapshot: Flag for snapshot mode
@ -1612,8 +1612,8 @@ static void aux_sdb_init(unsigned long sdb)
*
* Return the private AUX buffer structure if success or NULL if fails.
*/
static void *aux_buffer_setup(int cpu, void **pages, int nr_pages,
bool snapshot)
static void *aux_buffer_setup(struct perf_event *event, void **pages,
int nr_pages, bool snapshot)
{
struct sf_buffer *sfb;
struct aux_buffer *aux;

View File

@ -77,10 +77,12 @@ static size_t buf_size(struct page *page)
}
static void *
bts_buffer_setup_aux(int cpu, void **pages, int nr_pages, bool overwrite)
bts_buffer_setup_aux(struct perf_event *event, void **pages,
int nr_pages, bool overwrite)
{
struct bts_buffer *buf;
struct page *page;
int cpu = event->cpu;
int node = (cpu == -1) ? cpu : cpu_to_node(cpu);
unsigned long offset;
size_t size = nr_pages << PAGE_SHIFT;

View File

@ -1114,10 +1114,11 @@ static int pt_buffer_init_topa(struct pt_buffer *buf, unsigned long nr_pages,
* Return: Our private PT buffer structure.
*/
static void *
pt_buffer_setup_aux(int cpu, void **pages, int nr_pages, bool snapshot)
pt_buffer_setup_aux(struct perf_event *event, void **pages,
int nr_pages, bool snapshot)
{
struct pt_buffer *buf;
int node, ret;
int node, ret, cpu = event->cpu;
if (!nr_pages)
return NULL;

View File

@ -177,15 +177,15 @@ static void etm_free_aux(void *data)
schedule_work(&event_data->work);
}
static void *etm_setup_aux(int event_cpu, void **pages,
static void *etm_setup_aux(struct perf_event *event, void **pages,
int nr_pages, bool overwrite)
{
int cpu;
int cpu = event->cpu;
cpumask_t *mask;
struct coresight_device *sink;
struct etm_event_data *event_data = NULL;
event_data = alloc_event_data(event_cpu);
event_data = alloc_event_data(cpu);
if (!event_data)
return NULL;
INIT_WORK(&event_data->work, free_event_data);

View File

@ -824,10 +824,10 @@ static void arm_spe_pmu_read(struct perf_event *event)
{
}
static void *arm_spe_pmu_setup_aux(int cpu, void **pages, int nr_pages,
bool snapshot)
static void *arm_spe_pmu_setup_aux(struct perf_event *event, void **pages,
int nr_pages, bool snapshot)
{
int i;
int i, cpu = event->cpu;
struct page **pglist;
struct arm_spe_pmu_buf *buf;

View File

@ -410,7 +410,7 @@ struct pmu {
/*
* Set up pmu-private data structures for an AUX area
*/
void *(*setup_aux) (int cpu, void **pages,
void *(*setup_aux) (struct perf_event *event, void **pages,
int nr_pages, bool overwrite);
/* optional */

View File

@ -657,7 +657,7 @@ int rb_alloc_aux(struct ring_buffer *rb, struct perf_event *event,
goto out;
}
rb->aux_priv = event->pmu->setup_aux(event->cpu, rb->aux_pages, nr_pages,
rb->aux_priv = event->pmu->setup_aux(event, rb->aux_pages, nr_pages,
overwrite);
if (!rb->aux_priv)
goto out;