linux-kernel - [PATCH v2,RESEND 1/2] drivers: perf: added capabilities for legacy PMU

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Message-ID: <20240227170002.188671-2-vadim.shakirov@syntacore.com>
Date: Tue, 27 Feb 2024 20:00:01 +0300
From: Vadim Shakirov <vadim.shakirov@...tacore.com>
To: <linux-riscv@...ts.infradead.org>
CC: Vadim Shakirov <vadim.shakirov@...tacore.com>, Atish Patra
	<atishp@...shpatra.org>, Anup Patel <anup@...infault.org>, Will Deacon
	<will@...nel.org>, Mark Rutland <mark.rutland@....com>, Paul Walmsley
	<paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, Albert Ou
	<aou@...s.berkeley.edu>, <linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, Atish Patra <atishp@...osinc.com>
Subject: [PATCH v2,RESEND 1/2] 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: Atish Patra <atishp@...osinc.com>
Signed-off-by: Vadim Shakirov <vadim.shakirov@...tacore.com>
---
 drivers/perf/riscv_pmu_legacy.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/perf/riscv_pmu_legacy.c b/drivers/perf/riscv_pmu_legacy.c
index 79fdd667922e..a85fc9a15f03 100644
--- a/drivers/perf/riscv_pmu_legacy.c
+++ b/drivers/perf/riscv_pmu_legacy.c
@@ -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);
 }
-- 
2.34.1