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s390/pai_crypto: Add common pai_start() function

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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: Thomas Richter <tmricht@linux.ibm.com>
Reviewed-by: Jan Polensky <japo@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Thomas Richter 2025-11-05 15:38:54 +01:00 committed by Heiko Carstens
parent 8f6116fd49
commit 6fe66b2157
1 changed files with 11 additions and 3 deletions
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14
arch/s390/kernel/perf_pai_crypto.c
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@ -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);