Unverified Commit 65730fe8 authored by Vadim Shakirov's avatar Vadim Shakirov Committed by Palmer Dabbelt
Browse files

drivers: perf: added capabilities for legacy PMU 



Added the PERF_PMU_CAP_NO_INTERRUPT flag because the legacy pmu driver
does not provide sampling capabilities

Added the PERF_PMU_CAP_NO_EXCLUDE flag because the legacy pmu driver
does not provide the ability to disable counter incrementation in
different privilege modes

Suggested-by: default avatarAtish Patra <atishp@rivosinc.com>
Signed-off-by: default avatarVadim Shakirov <vadim.shakirov@syntacore.com>
Reviewed-by: default avatarAtish Patra <atishp@rivosinc.com>
Fixes: 9b3e150e ("RISC-V: Add a simple platform driver for RISC-V  legacy perf")
Link: https://lore.kernel.org/r/20240227170002.188671-2-vadim.shakirov@syntacore.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent 6613476e

drivers/perf/riscv_pmu_legacy.c

+2 −0
Original line number Diff line number Diff line
@@ -117,6 +117,8 @@ static void pmu_legacy_init(struct riscv_pmu *pmu) 
	pmu->event_mapped = pmu_legacy_event_mapped;

	pmu->event_unmapped = pmu_legacy_event_unmapped;

	pmu->csr_index = pmu_legacy_csr_index;

	pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;

	pmu->pmu.capabilities |= PERF_PMU_CAP_NO_EXCLUDE;



	perf_pmu_register(&pmu->pmu, "cpu", PERF_TYPE_RAW);

}