Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
perf/arm_cspmu: Add arm_cspmu_acpi_dev_get
Add interface to get ACPI device associated with the
PMU. This ACPI device may contain additional properties
not covered by the standard properties.
Reviewed-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Signed-off-by: Besar Wicaksono <bwicaksono@nvidia.com>
Signed-off-by: Will Deacon <will@kernel.org>
authored by
Besar Wicaksono
and committed by
Will Deacon
bc86281f
f5caf26f
+34
-2
+18
-1
drivers/perf/arm_cspmu/arm_cspmu.c
+18
-1
drivers/perf/arm_cspmu/arm_cspmu.c
···
16
16
* The user should refer to the vendor technical documentation to get details
17
17
* about the supported events.
18
18
*
19
-
* Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
19
+
* Copyright (c) 2022-2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
20
20
*
21
21
*/
22
22
···
1132
1132
1133
1133
return 0;
1134
1134
}
1135
+
1136
+
struct acpi_device *arm_cspmu_acpi_dev_get(const struct arm_cspmu *cspmu)
1137
+
{
1138
+
char hid[16] = {};
1139
+
char uid[16] = {};
1140
+
const struct acpi_apmt_node *apmt_node;
1141
+
1142
+
apmt_node = arm_cspmu_apmt_node(cspmu->dev);
1143
+
if (!apmt_node || apmt_node->type != ACPI_APMT_NODE_TYPE_ACPI)
1144
+
return NULL;
1145
+
1146
+
memcpy(hid, &apmt_node->inst_primary, sizeof(apmt_node->inst_primary));
1147
+
snprintf(uid, sizeof(uid), "%u", apmt_node->inst_secondary);
1148
+
1149
+
return acpi_dev_get_first_match_dev(hid, uid, -1);
1150
+
}
1151
+
EXPORT_SYMBOL_GPL(arm_cspmu_acpi_dev_get);
1135
1152
#else
1136
1153
static int arm_cspmu_acpi_get_cpus(struct arm_cspmu *cspmu)
1137
1154
{
+16
-1
drivers/perf/arm_cspmu/arm_cspmu.h
+16
-1
drivers/perf/arm_cspmu/arm_cspmu.h
···
1
1
/* SPDX-License-Identifier: GPL-2.0
2
2
*
3
3
* ARM CoreSight Architecture PMU driver.
4
-
* Copyright (c) 2022-2023, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
4
+
* Copyright (c) 2022-2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
5
5
*
6
6
*/
7
7
8
8
#ifndef __ARM_CSPMU_H__
9
9
#define __ARM_CSPMU_H__
10
10
11
+
#include <linux/acpi.h>
11
12
#include <linux/bitfield.h>
12
13
#include <linux/cpumask.h>
13
14
#include <linux/device.h>
···
255
254
256
255
/* Unregister vendor backend. */
257
256
void arm_cspmu_impl_unregister(const struct arm_cspmu_impl_match *impl_match);
257
+
258
+
#if defined(CONFIG_ACPI) && defined(CONFIG_ARM64)
259
+
/**
260
+
* Get ACPI device associated with the PMU.
261
+
* The caller is responsible for calling acpi_dev_put() on the returned device.
262
+
*/
263
+
struct acpi_device *arm_cspmu_acpi_dev_get(const struct arm_cspmu *cspmu);
264
+
#else
265
+
static inline struct acpi_device *
266
+
arm_cspmu_acpi_dev_get(const struct arm_cspmu *cspmu)
267
+
{
268
+
return NULL;
269
+
}
270
+
#endif
258
271
259
272
#endif /* __ARM_CSPMU_H__ */