Commit 8f6116fd authored by Thomas Richter's avatar Thomas Richter Committed by Heiko Carstens
Browse files

s390/pai_crypto: Add common pai_read() 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_read() to read counter values.
The function expects a PAI PMU specific read function as second
parameter.

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 74466e87

arch/s390/kernel/perf_pai_crypto.c

+9 −4
Original line number Diff line number Diff line
@@ -365,18 +365,23 @@ static int paicrypt_event_init(struct perf_event *event) 
	return rc;

}



static void paicrypt_read(struct perf_event *event)

static void pai_read(struct perf_event *event,

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

{

	u64 prev, new, delta;



	prev = local64_read(&event->hw.prev_count);

	new = paicrypt_getall(event);

	new = fct(event);

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

	delta = (prev <= new) ? new - prev

			      : (-1ULL - prev) + new + 1;	 /* overflow */

	delta = (prev <= new) ? new - prev : (-1ULL - prev) + new + 1;

	local64_add(delta, &event->count);

}



static void paicrypt_read(struct perf_event *event)

{

	pai_read(event, paicrypt_getall);

}



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

{

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