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From: Sumit Gupta <sumitg@nvidia.com>
To: <viresh.kumar@linaro.org>, <rafael@kernel.org>,
	<ionela.voinescu@arm.com>, <mark.rutland@arm.com>,
	<sudeep.holla@arm.com>, <lpieralisi@kernel.org>,
	<catalin.marinas@arm.com>, <will@kernel.org>
Cc: <linux-pm@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
	<treding@nvidia.com>, <jonathanh@nvidia.com>, <vsethi@nvidia.com>,
	<sdonthineni@nvidia.com>, <sanjayc@nvidia.com>,
	<ksitaraman@nvidia.com>, <bbasu@nvidia.com>, <sumitg@nvidia.com>
Subject: [Patch 5/6] arm64: cpufeature: Export get_cpu_with_amu_feat func
Date: Tue, 18 Apr 2023 17:04:58 +0530	[thread overview]
Message-ID: <20230418113459.12860-6-sumitg@nvidia.com> (raw)
In-Reply-To: <20230418113459.12860-1-sumitg@nvidia.com>

Export the get_cpu_with_amu_feat() function for use by
"cppc_cpufreq" to check if any CPU implements ARM's
Activity Monitor Unit (AMU). If AMU is available, then
for re-constructing the current CPU freq from its
counters, queue work on target CPU to read the counters
in a single call instead of reading them in separate
smp calls.

Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
---
 arch/arm64/kernel/cpufeature.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index d9345e9c0226..ec31da7043eb 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1917,6 +1917,7 @@ int get_cpu_with_amu_feat(void)
 {
 	return cpumask_any(&amu_cpus);
 }
+EXPORT_SYMBOL_GPL(get_cpu_with_amu_feat);
 
 static void cpu_amu_enable(struct arm64_cpu_capabilities const *cap)
 {
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Sumit Gupta <sumitg@nvidia.com>
To: <viresh.kumar@linaro.org>, <rafael@kernel.org>,
	<ionela.voinescu@arm.com>, <mark.rutland@arm.com>,
	<sudeep.holla@arm.com>, <lpieralisi@kernel.org>,
	<catalin.marinas@arm.com>, <will@kernel.org>
Cc: <linux-pm@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
	<treding@nvidia.com>, <jonathanh@nvidia.com>, <vsethi@nvidia.com>,
	<sdonthineni@nvidia.com>, <sanjayc@nvidia.com>,
	<ksitaraman@nvidia.com>, <bbasu@nvidia.com>, <sumitg@nvidia.com>
Subject: [Patch 5/6] arm64: cpufeature: Export get_cpu_with_amu_feat func
Date: Tue, 18 Apr 2023 17:04:58 +0530	[thread overview]
Message-ID: <20230418113459.12860-6-sumitg@nvidia.com> (raw)
In-Reply-To: <20230418113459.12860-1-sumitg@nvidia.com>

Export the get_cpu_with_amu_feat() function for use by
"cppc_cpufreq" to check if any CPU implements ARM's
Activity Monitor Unit (AMU). If AMU is available, then
for re-constructing the current CPU freq from its
counters, queue work on target CPU to read the counters
in a single call instead of reading them in separate
smp calls.

Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
---
 arch/arm64/kernel/cpufeature.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c
index d9345e9c0226..ec31da7043eb 100644
--- a/arch/arm64/kernel/cpufeature.c
+++ b/arch/arm64/kernel/cpufeature.c
@@ -1917,6 +1917,7 @@ int get_cpu_with_amu_feat(void)
 {
 	return cpumask_any(&amu_cpus);
 }
+EXPORT_SYMBOL_GPL(get_cpu_with_amu_feat);
 
 static void cpu_amu_enable(struct arm64_cpu_capabilities const *cap)
 {
-- 
2.17.1


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  parent reply	other threads:[~2023-04-18 11:36 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-18 11:34 [Patch 0/6] CPPC_CPUFREQ improvements for Tegra241 Sumit Gupta
2023-04-18 11:34 ` Sumit Gupta
2023-04-18 11:34 ` [Patch 1/6] cpufreq: use correct unit when verify cur freq Sumit Gupta
2023-04-18 11:34   ` Sumit Gupta
2023-04-18 12:57   ` Rafael J. Wysocki
2023-04-18 12:57     ` Rafael J. Wysocki
2023-04-18 13:31     ` Sumit Gupta
2023-04-18 13:31       ` Sumit Gupta
2023-04-18 15:47       ` Rafael J. Wysocki
2023-04-18 15:47         ` Rafael J. Wysocki
2023-04-18 11:34 ` [Patch 2/6] cpufreq: CPPC: make workaround apply code generic Sumit Gupta
2023-04-18 11:34   ` Sumit Gupta
2023-04-18 11:34 ` [Patch 3/6] irqchip/gicv3: Export arm_smccc_get_soc_id_xx funcs Sumit Gupta
2023-04-18 11:34   ` Sumit Gupta
2023-04-26 19:33   ` Florian Fainelli
2023-04-26 19:33     ` Florian Fainelli
2023-04-18 11:34 ` [Patch 4/6] cpufreq: CPPC: update sampling window for Tegra241 Sumit Gupta
2023-04-18 11:34   ` Sumit Gupta
2023-04-18 11:34 ` Sumit Gupta [this message]
2023-04-18 11:34   ` [Patch 5/6] arm64: cpufeature: Export get_cpu_with_amu_feat func Sumit Gupta
2023-04-18 11:34 ` [Patch 6/6] cpufreq: CPPC: use wq to read amu counters on target cpu Sumit Gupta
2023-04-18 11:34   ` Sumit Gupta
2023-04-24  8:32   ` Ionela Voinescu
2023-04-24  8:32     ` Ionela Voinescu
2023-04-26 15:52     ` Sumit Gupta
2023-04-26 15:52       ` Sumit Gupta

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