powerpc/perf: Add macros for defining event fields & formats (7b43c679) · Commits · 戴 / test

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>

arch/powerpc/perf/hv-common.h

+19 −0

Original line number	Diff line number	Diff line
		#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

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