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lib: sbi_pmu: Implement SBI PMU event info function

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Allow the supervisor software to query about the event using the
new function. This supports both firmware and hardware events.
The hardware event presence is verified hw_event_map which is populated
via PMU device tree node. The firmware event presence is checked through
event validation function which should take care of both standard and
platform firmware events.

Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Atish Patra
2024-11-19 11:34:38 -08:00
committed by Anup Patel
parent 05970d273c
commit e434584216
3 changed files with 81 additions and 0 deletions
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lib/sbi/sbi_ecall_pmu.c
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@@ -73,6 +73,9 @@ static int sbi_ecall_pmu_handler(unsigned long extid, unsigned long funcid,
case SBI_EXT_PMU_COUNTER_STOP:
ret = sbi_pmu_ctr_stop(regs->a0, regs->a1, regs->a2);
break;
case SBI_EXT_PMU_EVENT_GET_INFO:
ret = sbi_pmu_event_get_info(regs->a0, regs->a1, regs->a2, regs->a3);
break;
case SBI_EXT_PMU_SNAPSHOT_SET_SHMEM:
/* fallthrough as OpenSBI doesn't support snapshot yet */
default: