| Message ID | 1543442478-31465-2-git-send-email-mathieu.poirier@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | perf: Add ioctl for PMU driver configuration | expand |
On Wed, Nov 28, 2018 at 03:01:13PM -0700, Mathieu Poirier wrote: > Adding a new IOCTL command to communicate PMU specific configuration to > PMU kernel drivers. This can be anything a PMU might need for > configuration that doesn't fit in the perf_event_attr structure, such > as the CoreSight sink to use for a session. > > Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> > --- > include/uapi/linux/perf_event.h | 1 + > tools/include/uapi/linux/perf_event.h | 1 + > 2 files changed, 2 insertions(+) > > diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h > index 9de8780ac8d9..bb558caeb33b 100644 > --- a/include/uapi/linux/perf_event.h > +++ b/include/uapi/linux/perf_event.h > @@ -462,6 +462,7 @@ struct perf_event_query_bpf { > #define PERF_EVENT_IOC_PAUSE_OUTPUT _IOW('$', 9, __u32) > #define PERF_EVENT_IOC_QUERY_BPF _IOWR('$', 10, struct perf_event_query_bpf *) > #define PERF_EVENT_IOC_MODIFY_ATTRIBUTES _IOW('$', 11, struct perf_event_attr *) > +#define PERF_EVENT_IOC_SET_DRV_CONFIG _IOW('$', 12, char *) A generic "char *" that the kernel is then going to parse? Can you make any more flexible of a new syscall to the kernel that allows anyone to do anything with this? :) Please make this a lot more specific, this is way to generic, sorry. greg k-h
diff --git a/include/uapi/linux/perf_event.h b/include/uapi/linux/perf_event.h index 9de8780ac8d9..bb558caeb33b 100644 --- a/include/uapi/linux/perf_event.h +++ b/include/uapi/linux/perf_event.h @@ -462,6 +462,7 @@ struct perf_event_query_bpf { #define PERF_EVENT_IOC_PAUSE_OUTPUT _IOW('$', 9, __u32) #define PERF_EVENT_IOC_QUERY_BPF _IOWR('$', 10, struct perf_event_query_bpf *) #define PERF_EVENT_IOC_MODIFY_ATTRIBUTES _IOW('$', 11, struct perf_event_attr *) +#define PERF_EVENT_IOC_SET_DRV_CONFIG _IOW('$', 12, char *) enum perf_event_ioc_flags { PERF_IOC_FLAG_GROUP = 1U << 0, diff --git a/tools/include/uapi/linux/perf_event.h b/tools/include/uapi/linux/perf_event.h index 9de8780ac8d9..bb558caeb33b 100644 --- a/tools/include/uapi/linux/perf_event.h +++ b/tools/include/uapi/linux/perf_event.h @@ -462,6 +462,7 @@ struct perf_event_query_bpf { #define PERF_EVENT_IOC_PAUSE_OUTPUT _IOW('$', 9, __u32) #define PERF_EVENT_IOC_QUERY_BPF _IOWR('$', 10, struct perf_event_query_bpf *) #define PERF_EVENT_IOC_MODIFY_ATTRIBUTES _IOW('$', 11, struct perf_event_attr *) +#define PERF_EVENT_IOC_SET_DRV_CONFIG _IOW('$', 12, char *) enum perf_event_ioc_flags { PERF_IOC_FLAG_GROUP = 1U << 0,
Adding a new IOCTL command to communicate PMU specific configuration to PMU kernel drivers. This can be anything a PMU might need for configuration that doesn't fit in the perf_event_attr structure, such as the CoreSight sink to use for a session. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> --- include/uapi/linux/perf_event.h | 1 + tools/include/uapi/linux/perf_event.h | 1 + 2 files changed, 2 insertions(+)