Commit 6fe66b21 authored by Thomas Richter's avatar Thomas Richter Committed by Heiko Carstens
Browse files

s390/pai_crypto: Add common pai_start() function 



To support one common PAI PMU device driver which handles
both PMUs pai_crypto and pai_ext, use a common naming scheme
for structures and variables suitable for both device drivers.

Add a common usable function pai_start() to the event on a CPU.
The function expects a PAI PMU specific read function as second
parameter to read out the start value for an event.

Signed-off-by: default avatarThomas Richter <tmricht@linux.ibm.com>
Reviewed-by: default avatarJan Polensky <japo@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent 8f6116fd

arch/s390/kernel/perf_pai_crypto.c

+11 −3
Original line number Diff line number Diff line
@@ -382,17 +382,20 @@ static void paicrypt_read(struct perf_event *event) 
	pai_read(event, paicrypt_getall);

}



static void paicrypt_start(struct perf_event *event, int flags)

static void pai_start(struct perf_event *event, int flags,

		      u64 (*fct)(struct perf_event *event))

{

	int idx = PAI_PMU_IDX(event);

	struct pai_pmu *pp = &pai_pmu[idx];

	struct pai_mapptr *mp = this_cpu_ptr(pai_root.mapptr);

	struct pai_map *cpump = mp->mapptr;

	u64 sum;



	if (!event->attr.sample_period) {	/* Counting */

		sum = paicrypt_getall(event);	/* Get current value */

		sum = fct(event);		/* Get current value */

		local64_set(&event->hw.prev_count, sum);

	} else {				/* Sampling */

		memcpy((void *)PAI_SAVE_AREA(event), cpump->area, PAGE_SIZE);

		memcpy((void *)PAI_SAVE_AREA(event), cpump->area, pp->area_size);

		/* Enable context switch callback for system-wide sampling */

		if (!(event->attach_state & PERF_ATTACH_TASK)) {

			list_add_tail(PAI_SWLIST(event), &cpump->syswide_list);
@@ -403,6 +406,11 @@ static void paicrypt_start(struct perf_event *event, int flags) 
	}

}



static void paicrypt_start(struct perf_event *event, int flags)

{

	pai_start(event, flags, paicrypt_getall);

}



static int paicrypt_add(struct perf_event *event, int flags)

{

	struct pai_mapptr *mp = this_cpu_ptr(pai_root.mapptr);