linux-kernel - [PATCH 1/5] perf/arm_cspmu: Export arm_cspmu_apmt

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Message-ID: <20250812233411.1694012-2-bwicaksono@nvidia.com>
Date: Tue, 12 Aug 2025 23:34:07 +0000
From: Besar Wicaksono <bwicaksono@...dia.com>
To: <will@...nel.org>
CC: <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<linux-tegra@...r.kernel.org>, <suzuki.poulose@....com>,
	<robin.murphy@....com>, <ilkka@...amperecomputing.com>,
	<mark.rutland@....com>, <treding@...dia.com>, <jonathanh@...dia.com>,
	<vsethi@...dia.com>, <rwiley@...dia.com>, <sdonthineni@...dia.com>, "Besar
 Wicaksono" <bwicaksono@...dia.com>
Subject: [PATCH 1/5] perf/arm_cspmu: Export arm_cspmu_apmt_node

Make arm_cspmu_apmt_node API accessible to vendor driver.

Signed-off-by: Besar Wicaksono <bwicaksono@...dia.com>
---
 drivers/perf/arm_cspmu/arm_cspmu.c | 3 ++-
 drivers/perf/arm_cspmu/arm_cspmu.h | 4 ++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/perf/arm_cspmu/arm_cspmu.c b/drivers/perf/arm_cspmu/arm_cspmu.c
index efa9b229e701..e4b98cfa606c 100644
--- a/drivers/perf/arm_cspmu/arm_cspmu.c
+++ b/drivers/perf/arm_cspmu/arm_cspmu.c
@@ -70,12 +70,13 @@ static void arm_cspmu_set_ev_filter(struct arm_cspmu *cspmu,
 static void arm_cspmu_set_cc_filter(struct arm_cspmu *cspmu,
 				    const struct perf_event *event);
 
-static struct acpi_apmt_node *arm_cspmu_apmt_node(struct device *dev)
+struct acpi_apmt_node *arm_cspmu_apmt_node(struct device *dev)
 {
 	struct acpi_apmt_node **ptr = dev_get_platdata(dev);
 
 	return ptr ? *ptr : NULL;
 }
+EXPORT_SYMBOL_GPL(arm_cspmu_apmt_node);
 
 /*
  * In CoreSight PMU architecture, all of the MMIO registers are 32-bit except
diff --git a/drivers/perf/arm_cspmu/arm_cspmu.h b/drivers/perf/arm_cspmu/arm_cspmu.h
index 19684b76bd96..36c1dcce33d6 100644
--- a/drivers/perf/arm_cspmu/arm_cspmu.h
+++ b/drivers/perf/arm_cspmu/arm_cspmu.h
@@ -8,6 +8,7 @@
 #ifndef __ARM_CSPMU_H__
 #define __ARM_CSPMU_H__
 
+#include <linux/acpi.h>
 #include <linux/bitfield.h>
 #include <linux/cpumask.h>
 #include <linux/device.h>
@@ -222,4 +223,7 @@ int arm_cspmu_impl_register(const struct arm_cspmu_impl_match *impl_match);
 /* Unregister vendor backend. */
 void arm_cspmu_impl_unregister(const struct arm_cspmu_impl_match *impl_match);
 
+/* Get ACPI APMT node. */
+struct acpi_apmt_node *arm_cspmu_apmt_node(struct device *dev);
+
 #endif /* __ARM_CSPMU_H__ */
-- 
2.47.0