diff options
| author | Mathieu Poirier <mathieu.poirier@linaro.org> | 2016-05-31 16:32:55 -0600 |
|---|---|---|
| committer | Mathieu Poirier <mathieu.poirier@linaro.org> | 2016-06-20 11:09:45 -0600 |
| commit | 1efb79086e3298b07f8734aae7614aa25ef82040 (patch) | |
| tree | 4f2bf7df370b09880bc53ffadfe7aeeeba6516e5 /include | |
| parent | 65ad7b198dccae96d776db85d1a184df214dddb4 (diff) | |
perf/core: adding PMU driver specific configuration
It is entirely possible that some PMUs need specific configuration
that is currently not found in the perf options before a session
can be setup.
It is the case for the CoreSight PMU where a sink needs to be
provided. That sink doesn't fall in any of the current perf
options.
As such this patch adds the capability to receive driver
specific configuration using the existing ioctl() mechanism.
Once the configuration has been pushed down the kernel PMU
callbacks are used to deal with the information sent from user
space.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/perf_event.h | 9 | ||||
| -rw-r--r-- | include/uapi/linux/perf_event.h | 1 |
2 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index f9828a48f16a..6e02e62fa1d9 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -391,6 +391,14 @@ struct pmu { * Filter events for PMU-specific reasons. */ int (*filter_match) (struct perf_event *event); /* optional */ + + /* + * Initial, PMU driver specific configuration. + */ + int (*get_drv_configs) (struct perf_event *event, + void __user *arg); /* optional */ + void (*free_drv_configs) (struct perf_event *event); + /* optional */ }; /** @@ -558,6 +566,7 @@ struct perf_event { struct irq_work pending; atomic_t event_limit; + struct list_head drv_configs; void (*destroy)(struct perf_event *); struct rcu_head rcu_head; diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index d801bb0d9f6d..cd2e88450faa 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -395,6 +395,7 @@ struct perf_event_attr { #define PERF_EVENT_IOC_SET_FILTER _IOW('$', 6, char *) #define PERF_EVENT_IOC_ID _IOR('$', 7, __u64 *) #define PERF_EVENT_IOC_SET_BPF _IOW('$', 8, __u32) +#define PERF_EVENT_IOC_SET_DRV_CONFIGS _IOW('$', 10, char *) enum perf_event_ioc_flags { PERF_IOC_FLAG_GROUP = 1U << 0, |