Messages in this thread Patch in this message | | | From | Cody P Schafer <> | Subject | [PATCH v3 02/11] perf: add PMU_FORMAT_RANGE() helper for use by sw-like pmus | Date | Thu, 27 Feb 2014 13:04:55 -0800 |
| |
Add PMU_FORMAT_RANGE() and PMU_FORMAT_RANGE_RESERVED() (for reserved areas) which generate functions to extract the relevent bits from event->attr.config{,1,2} for use by sw-like pmus where the 'config{,1,2}' values don't map directly to hardware registers.
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com> --- include/linux/perf_event.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index e56b07f..3da5081 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -871,4 +871,21 @@ _name##_show(struct device *dev, \ \ static struct device_attribute format_attr_##_name = __ATTR_RO(_name) +#define PMU_FORMAT_RANGE(name, attr_var, bit_start, bit_end) \ +PMU_FORMAT_ATTR(name, #attr_var ":" #bit_start "-" #bit_end); \ +PMU_FORMAT_RANGE_RESERVED(name, attr_var, bit_start, bit_end) + +#define PMU_FORMAT_RANGE_RESERVED(name, attr_var, bit_start, bit_end) \ +static u64 event_get_##name##_max(void) \ +{ \ + int bits = (bit_end) - (bit_start) + 1; \ + return ((0x1ULL << (bits - 1ULL)) - 1ULL) | \ + (0xFULL << (bits - 4ULL)); \ +} \ +static u64 event_get_##name(struct perf_event *event) \ +{ \ + return (event->attr.attr_var >> (bit_start)) & \ + event_get_##name##_max(); \ +} + #endif /* _LINUX_PERF_EVENT_H */ -- 1.9.0
| |