From nobody Wed Sep 10 05:59:25 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1E2913115B5; Mon, 8 Sep 2025 16:31:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757349112; cv=none; b=G8dlqYKWZhKOEH/62keQwUrQ/fOmrEe/qtoR+qDLS+ki3XRI2MHemOP9KQxc1QrnV99fLnrs3v5amgaW25uFEyKTLI3lHyKg4uux2KTm6FYTYSjxKJKqc64sEBP1tbm2iS2S0DtqGfeMocnsbixPreOgoE/+tgeJJf/6kPjoI6Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757349112; c=relaxed/simple; bh=BheY/4Tjx4s0jW8mBSJJ3tgbkDMxPNLTTZYFhhqSOcQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=bePzx1jgLL7gXcHehPffO5xwxjY7v+sBc89QWHJ05NMk/LMGJO+zkZL84hThulBJpemVbauELPxgozBn+Al2Q0v7k+rvpxYay/sug5EosrFJXA4qIZA5Ho+QVzPXUC15IDvHsze8euZXMuyco3m0b+VpAqJVLTTrleNzyFKsCCE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EqFRbLKd; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EqFRbLKd" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EA470C4CEF7; Mon, 8 Sep 2025 16:31:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1757349112; bh=BheY/4Tjx4s0jW8mBSJJ3tgbkDMxPNLTTZYFhhqSOcQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EqFRbLKdD5duE5VlTat2zDtmpG9tuOra0yPYcPrKx3AD7lQNnCdqzVLhy4ZfypfKe /DhkH7nW3Xn+jNtljL339pZmySnOB6ElNQ92+PuumUl5q7QB4tZsXPdhSU74CKSjEn KulEOfgTDqG7HCVEJFQzg9ZMQ+flubWCucMv1Mab8uMRSkXPfoWjnu70AJuPanMpYn Au8M4q0cKvUQcfQAumx6HCwvgdYXPA6ahQ+HtPLMeMT0zvILXfMffONOiAqnLaSeht qMfGmtxOFoC6hiWSVHUs0Reolinw8PUZHY4ujlSKdBJSxCqgLGVVhnMBZmfbArCN6t ndNeNIcGMnfig== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1uvemU-00000004NTm-0VTl; Mon, 08 Sep 2025 16:31:50 +0000 From: Marc Zyngier To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org Cc: Thomas Gleixner , Mark Rutland , Will Deacon , "Rafael J. Wysocki" , Rob Herring , Saravana Kannan , Greg Kroah-Hartman , Sven Peter , Janne Grunau , Suzuki K Poulose , James Clark Subject: [PATCH 17/25] perf: arm_pmu: Use a backend-specific pointer for percpu interrupt request Date: Mon, 8 Sep 2025 17:31:19 +0100 Message-Id: <20250908163127.2462948-18-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250908163127.2462948-1-maz@kernel.org> References: <20250908163127.2462948-1-maz@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, tglx@linutronix.de, mark.rutland@arm.com, will@kernel.org, rafael@kernel.org, robh@kernel.org, saravanak@google.com, gregkh@linuxfoundation.org, sven@kernel.org, j@jannau.net, suzuki.poulose@arm.com, james.clark@linaro.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Content-Type: text/plain; charset="utf-8" From: Will Deacon DT and ACPI significantly differ in the way the PMU probing is conducted, resulting in different data being available at different times. Work around this by providing a per-cpu 'struct arm_pmu *' as a parameter, instead of sampling it from a per-cpu variable. Signed-off-by: Will Deacon Signed-off-by: Marc Zyngier --- drivers/perf/arm_pmu.c | 10 +++++----- drivers/perf/arm_pmu_acpi.c | 2 +- drivers/perf/arm_pmu_platform.c | 4 ++-- include/linux/perf/arm_pmu.h | 4 ++-- 4 files changed, 10 insertions(+), 10 deletions(-) diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c index d1f738eb77f1e..044c9c6296997 100644 --- a/drivers/perf/arm_pmu.c +++ b/drivers/perf/arm_pmu.c @@ -628,20 +628,20 @@ static const struct pmu_irq_ops *armpmu_find_irq_ops(= int this_cpu, int irq) return ops; } =20 -void armpmu_free_irq(int irq, int cpu) +void armpmu_free_irq(struct arm_pmu * __percpu *armpmu, int irq, int cpu) { if (per_cpu(cpu_irq, cpu) =3D=3D 0) return; if (WARN_ON(irq !=3D per_cpu(cpu_irq, cpu))) return; =20 - per_cpu(cpu_irq_ops, cpu)->free_pmuirq(irq, cpu, &cpu_armpmu); + per_cpu(cpu_irq_ops, cpu)->free_pmuirq(irq, cpu, armpmu); =20 per_cpu(cpu_irq, cpu) =3D 0; per_cpu(cpu_irq_ops, cpu) =3D NULL; } =20 -int armpmu_request_irq(int irq, int cpu) +int armpmu_request_irq(struct arm_pmu * __percpu *armpmu, int irq, int cpu) { int err =3D 0; const irq_handler_t handler =3D armpmu_dispatch_irq; @@ -666,12 +666,12 @@ int armpmu_request_irq(int irq, int cpu) IRQF_NO_THREAD; =20 err =3D request_nmi(irq, handler, irq_flags, "arm-pmu", - per_cpu_ptr(&cpu_armpmu, cpu)); + per_cpu_ptr(armpmu, cpu)); =20 /* If cannot get an NMI, get a normal interrupt */ if (err) { err =3D request_irq(irq, handler, irq_flags, "arm-pmu", - per_cpu_ptr(&cpu_armpmu, cpu)); + per_cpu_ptr(armpmu, cpu)); irq_ops =3D &pmuirq_ops; } else { has_nmi =3D true; diff --git a/drivers/perf/arm_pmu_acpi.c b/drivers/perf/arm_pmu_acpi.c index a5956fa728070..a28352e2bff0a 100644 --- a/drivers/perf/arm_pmu_acpi.c +++ b/drivers/perf/arm_pmu_acpi.c @@ -223,7 +223,7 @@ static int arm_pmu_acpi_parse_irqs(void) * them with their PMUs. */ per_cpu(pmu_irqs, cpu) =3D irq; - err =3D armpmu_request_irq(irq, cpu); + err =3D armpmu_request_irq(&probed_pmus, irq, cpu); if (err) goto out_err; } diff --git a/drivers/perf/arm_pmu_platform.c b/drivers/perf/arm_pmu_platfor= m.c index 0c7d5065e9074..d9b0e8f6debf2 100644 --- a/drivers/perf/arm_pmu_platform.c +++ b/drivers/perf/arm_pmu_platform.c @@ -169,7 +169,7 @@ static int armpmu_request_irqs(struct arm_pmu *armpmu) if (!irq) continue; =20 - err =3D armpmu_request_irq(irq, cpu); + err =3D armpmu_request_irq(&hw_events->percpu_pmu, irq, cpu); if (err) break; } @@ -185,7 +185,7 @@ static void armpmu_free_irqs(struct arm_pmu *armpmu) for_each_cpu(cpu, &armpmu->supported_cpus) { int irq =3D per_cpu(hw_events->irq, cpu); =20 - armpmu_free_irq(irq, cpu); + armpmu_free_irq(&hw_events->percpu_pmu, irq, cpu); } } =20 diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h index 7bf548678b288..395d03c282e8c 100644 --- a/include/linux/perf/arm_pmu.h +++ b/include/linux/perf/arm_pmu.h @@ -191,8 +191,8 @@ bool arm_pmu_irq_is_nmi(void); struct arm_pmu *armpmu_alloc(void); void armpmu_free(struct arm_pmu *pmu); int armpmu_register(struct arm_pmu *pmu); -int armpmu_request_irq(int irq, int cpu); -void armpmu_free_irq(int irq, int cpu); +int armpmu_request_irq(struct arm_pmu * __percpu *armpmu, int irq, int cpu= ); +void armpmu_free_irq(struct arm_pmu * __percpu *armpmu, int irq, int cpu); =20 #define ARMV8_PMU_PDEV_NAME "armv8-pmu" =20 --=20 2.39.2