arch/powerpc/perf/hv-common.h

Source file repositories/reference/linux-study-clean/arch/powerpc/perf/hv-common.h

File Facts

System
Linux kernel
Corpus path
arch/powerpc/perf/hv-common.h
Extension
.h
Size
1476 bytes
Lines
48
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct hv_perf_caps {
	u16 version;
	u16 collect_privileged:1,
	    ga:1,
	    expanded:1,
	    lab:1,
	    unused:12;
};

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)

/*
 * The EVENT_DEFINE_RANGE_FORMAT() macro above includes helper functions
 * for the fields (eg: event_get_starting_index()). For some fields we
 * need the bit-range definition, but no the helper functions. Define a
 * lite version of the above macro without the helpers and silence
 * compiler warnings unused static functions.
 */
#define EVENT_DEFINE_RANGE_FORMAT_LITE(name, attr_var, bit_start, bit_end) \
PMU_FORMAT_ATTR(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

Annotation

Implementation Notes