diff options
| author | Cody P Schafer <cody@linux.vnet.ibm.com> | 2014-03-14 16:00:40 +1100 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-03-24 09:48:31 +1100 |
| commit | 7b43c67950f0985be257f5fb7d656557e24d92d9 (patch) | |
| tree | e4dee9548f8c52c49043c65ddae4d4ca77265440 /arch/powerpc/perf | |
| parent | 2d1b21ad7d1574c7aaa5b9acdb3a02fd37a11c01 (diff) | |
powerpc/perf: Add macros for defining event fields & formats
Add two macros which generate functions to extract the relevent bits
from event->attr.config{,1,2}.
EVENT_DEFINE_RANGE() defines an accessor for a range of bits in the
event, as well as a "max" function that gives the maximum value of the
field based on the bit width.
EVENT_DEFINE_RANGE_FORMAT() defines the accessor & max routine and also
a format attribute for use in the PMU's attr_groups.
Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
[mpe: move to powerpc, ugly but descriptive macro names]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/perf')
| -rw-r--r-- | arch/powerpc/perf/hv-common.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/powerpc/perf/hv-common.h b/arch/powerpc/perf/hv-common.h index 7e615bd38bc..5d79cecbd73 100644 --- a/arch/powerpc/perf/hv-common.h +++ b/arch/powerpc/perf/hv-common.h @@ -1,6 +1,7 @@ #ifndef LINUX_POWERPC_PERF_HV_COMMON_H_ #define LINUX_POWERPC_PERF_HV_COMMON_H_ +#include <linux/perf_event.h> #include <linux/types.h> struct hv_perf_caps { @@ -14,4 +15,22 @@ struct hv_perf_caps { unsigned long hv_perf_caps_get(struct hv_perf_caps *caps); + +#define EVENT_DEFINE_RANGE_FORMAT(name, attr_var, bit_start, bit_end) \ +PMU_FORMAT_ATTR(name, #attr_var ":" #bit_start "-" #bit_end); \ +EVENT_DEFINE_RANGE(name, attr_var, bit_start, bit_end) + +#define EVENT_DEFINE_RANGE(name, attr_var, bit_start, bit_end) \ +static u64 event_get_##name##_max(void) \ +{ \ + BUILD_BUG_ON((bit_start > bit_end) \ + || (bit_end >= (sizeof(1ull) * 8))); \ + return (((1ull << (bit_end - bit_start)) - 1) << 1) + 1; \ +} \ +static u64 event_get_##name(struct perf_event *event) \ +{ \ + return (event->attr.attr_var >> (bit_start)) & \ + event_get_##name##_max(); \ +} + #endif |