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| author |   Jiri Olsa <jolsa@redhat.com> | 2012-03-15 20:09:14 +0100 |
|---|---|---|
| committer |   Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-03-16 14:06:06 -0300 |
| commit | 641cc938815dfd09f8fa1ec72deb814f0938ac33 (patch) | |
| tree | 8ced57a6b2d427bd34dcc30d3aebba3e0af45bb3 /include/linux/perf_event.h | |
| parent | perf tools: Adjust make rules (diff) | |
| download | linux-dev-641cc938815dfd09f8fa1ec72deb814f0938ac33.tar.xz linux-dev-641cc938815dfd09f8fa1ec72deb814f0938ac33.zip | |
perf: Adding sysfs group format attribute for pmu device
Adding sysfs group 'format' attribute for pmu device that
contains a syntax description on how to construct raw events.
The event configuration is described in following
struct pefr_event_attr attributes:
config
config1
config2
Each sysfs attribute within the format attribute group,
describes mapping of name and bitfield definition within
one of above attributes.
eg:
"/sys/...<dev>/format/event" contains "config:0-7"
"/sys/...<dev>/format/umask" contains "config:8-15"
"/sys/...<dev>/format/usr" contains "config:16"
the attribute value syntax is:
line: config ':' bits
config: 'config' | 'config1' | 'config2"
bits: bits ',' bit_term | bit_term
bit_term: VALUE '-' VALUE | VALUE
Adding format attribute definitions for x86 cpu pmus.
Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/n/tip-vhdk5y2hyype9j63prymty36@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'include/linux/perf_event.h')
| -rw-r--r-- | include/linux/perf_event.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index bd9f55a5958d..57ae485e80fc 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -550,6 +550,7 @@ struct perf_guest_info_callbacks { #include <linux/irq_work.h> #include <linux/static_key.h> #include <linux/atomic.h> +#include <linux/sysfs.h> #include <asm/local.h> #define PERF_MAX_STACK_DEPTH 255 @@ -1291,5 +1292,18 @@ do { \ register_cpu_notifier(&fn##_nb); \ } while (0) + +#define PMU_FORMAT_ATTR(_name, _format) \ +static ssize_t \ +_name##_show(struct device *dev, \ + struct device_attribute *attr, \ + char *page) \ +{ \ + BUILD_BUG_ON(sizeof(_format) >= PAGE_SIZE); \ + return sprintf(page, _format "\n"); \ +} \ + \ +static struct device_attribute format_attr_##_name = __ATTR_RO(_name) + #endif /* __KERNEL__ */ #endif /* _LINUX_PERF_EVENT_H */ |