[PATCH v4 06/13] perf: RISC-V: Eliminate redundant interrupt enable/disable operations

From: Yu Chien Peter Lin <peterlin@andestech.com>
To: <acme@kernel.org>, <adrian.hunter@intel.com>,
	<ajones@ventanamicro.com>, <alexander.shishkin@linux.intel.com>,
	<andre.przywara@arm.com>, <anup@brainfault.org>,
	<aou@eecs.berkeley.edu>, <atishp@atishpatra.org>,
	<conor+dt@kernel.org>, <conor.dooley@microchip.com>,
	<conor@kernel.org>, <devicetree@vger.kernel.org>,
	<dminus@andestech.com>, <evan@rivosinc.com>,
	<geert+renesas@glider.be>, <guoren@kernel.org>, <heiko@sntech.de>,
	<irogers@google.com>, <jernej.skrabec@gmail.com>,
	<jolsa@kernel.org>, <jszhang@kernel.org>,
	<krzysztof.kozlowski+dt@linaro.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	<linux-perf-users@vger.kernel.org>,
	<linux-renesas-soc@vger.kernel.org>,
	<linux-riscv@lists.infradead.org>, <linux-sunxi@lists.linux.dev>,
	<locus84@andestech.com>, <magnus.damm@gmail.com>,
	<mark.rutland@arm.com>, <mingo@redhat.com>, <n.shubin@yadro.com>,
	<namhyung@kernel.org>, <palmer@dabbelt.com>,
	<paul.walmsley@sifive.com>, <peterlin@andestech.com>,
	<peterz@infradead.org>, <prabhakar.mahadev-lad.rj@bp.renesas.com>,
	<rdunlap@infradead.org>, <robh+dt@kernel.org>,
	<samuel@sholland.org>, <sunilvl@ventanamicro.com>,
	<tglx@linutronix.de>, <tim609@andestech.com>, <uwu@icenowy.me>,
	<wens@csie.org>, <will@kernel.org>, <ycliang@andestech.com>,
	<inochiama@outlook.com>
Subject: [PATCH v4 06/13] perf: RISC-V: Eliminate redundant interrupt enable/disable operations
Date: Wed, 22 Nov 2023 20:12:28 +0800	[thread overview]
Message-ID: <20231122121235.827122-7-peterlin@andestech.com> (raw)
In-Reply-To: <20231122121235.827122-1-peterlin@andestech.com>

The interrupt enable/disable operations are already performed by the
IRQ chip functions riscv_intc_irq_unmask()/riscv_intc_irq_mask() during
enable_percpu_irq()/disable_percpu_irq(). We can just do it once.

Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
---
This patch allows us to drop unnecessary ALT_SBI_PMU_OVF_{DISABLE,ENABLE}
in the last PATCH3 [1].

[1] https://patchwork.kernel.org/project/linux-riscv/patch/20230907021635.1002738-4-peterlin@andestech.com/

Changes v1 -> v2:
  - New patch
Changes v2 -> v3:
  - No change
Changes v3 -> v4:
  - No change
---
 drivers/perf/riscv_pmu_sbi.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/perf/riscv_pmu_sbi.c b/drivers/perf/riscv_pmu_sbi.c
index 16acd4dcdb96..2edbc37abadf 100644
--- a/drivers/perf/riscv_pmu_sbi.c
+++ b/drivers/perf/riscv_pmu_sbi.c
@@ -781,7 +781,6 @@ static int pmu_sbi_starting_cpu(unsigned int cpu, struct hlist_node *node)
 	if (riscv_pmu_use_irq) {
 		cpu_hw_evt->irq = riscv_pmu_irq;
 		csr_clear(CSR_IP, BIT(riscv_pmu_irq_num));
-		csr_set(CSR_IE, BIT(riscv_pmu_irq_num));
 		enable_percpu_irq(riscv_pmu_irq, IRQ_TYPE_NONE);
 	}
 
@@ -792,7 +791,6 @@ static int pmu_sbi_dying_cpu(unsigned int cpu, struct hlist_node *node)
 {
 	if (riscv_pmu_use_irq) {
 		disable_percpu_irq(riscv_pmu_irq);
-		csr_clear(CSR_IE, BIT(riscv_pmu_irq_num));
 	}
 
 	/* Disable all counters access for user mode now */
-- 
2.34.1


_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
