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-rw-r--r--arch/arm/kernel/perf_event.c175
-rw-r--r--arch/arm/kernel/perf_event_v6.c8
-rw-r--r--arch/arm/kernel/perf_event_v7.c22
-rw-r--r--arch/arm/kernel/perf_event_xscale.c8
4 files changed, 110 insertions, 103 deletions
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 22ed5120a6e..7c29914bdcc 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -16,6 +16,7 @@
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/export.h>
+#include <linux/of.h>
#include <linux/perf_event.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
@@ -610,9 +611,11 @@ static void __init armpmu_init(struct arm_pmu *armpmu)
};
}
-int __init armpmu_register(struct arm_pmu *armpmu, char *name, int type)
+int armpmu_register(struct arm_pmu *armpmu, char *name, int type)
{
armpmu_init(armpmu);
+ pr_info("enabled with %s PMU driver, %d counters available\n",
+ armpmu->name, armpmu->num_events);
return perf_pmu_register(&armpmu->pmu, name, type);
}
@@ -621,74 +624,12 @@ int __init armpmu_register(struct arm_pmu *armpmu, char *name, int type)
#include "perf_event_v6.c"
#include "perf_event_v7.c"
-/*
- * Ensure the PMU has sane values out of reset.
- * This requires SMP to be available, so exists as a separate initcall.
- */
-static int __init
-cpu_pmu_reset(void)
-{
- if (cpu_pmu && cpu_pmu->reset)
- return on_each_cpu(cpu_pmu->reset, NULL, 1);
- return 0;
-}
-arch_initcall(cpu_pmu_reset);
-
-/*
- * PMU platform driver and devicetree bindings.
- */
-static struct of_device_id armpmu_of_device_ids[] = {
- {.compatible = "arm,cortex-a15-pmu"},
- {.compatible = "arm,cortex-a9-pmu"},
- {.compatible = "arm,cortex-a8-pmu"},
- {.compatible = "arm,cortex-a7-pmu"},
- {.compatible = "arm,cortex-a5-pmu"},
- {.compatible = "arm,arm11mpcore-pmu"},
- {.compatible = "arm,arm1176-pmu"},
- {.compatible = "arm,arm1136-pmu"},
- {},
-};
-
-static struct platform_device_id armpmu_plat_device_ids[] = {
- {.name = "arm-pmu"},
- {},
-};
-
-static int __devinit armpmu_device_probe(struct platform_device *pdev)
-{
- if (!cpu_pmu)
- return -ENODEV;
-
- cpu_pmu->plat_device = pdev;
- return 0;
-}
-
-static const struct dev_pm_ops armpmu_dev_pm_ops = {
- SET_RUNTIME_PM_OPS(armpmu_runtime_suspend, armpmu_runtime_resume, NULL)
-};
-
-static struct platform_driver armpmu_driver = {
- .driver = {
- .name = "arm-pmu",
- .pm = &armpmu_dev_pm_ops,
- .of_match_table = armpmu_of_device_ids,
- },
- .probe = armpmu_device_probe,
- .id_table = armpmu_plat_device_ids,
-};
-
-static int __init register_pmu_driver(void)
-{
- return platform_driver_register(&armpmu_driver);
-}
-device_initcall(register_pmu_driver);
-
static struct pmu_hw_events *armpmu_get_cpu_events(void)
{
return &__get_cpu_var(cpu_hw_events);
}
-static void __init cpu_pmu_init(struct arm_pmu *armpmu)
+static void __devinit cpu_pmu_init(struct arm_pmu *cpu_pmu)
{
int cpu;
for_each_possible_cpu(cpu) {
@@ -697,7 +638,11 @@ static void __init cpu_pmu_init(struct arm_pmu *armpmu)
events->used_mask = per_cpu(used_mask, cpu);
raw_spin_lock_init(&events->pmu_lock);
}
- armpmu->get_hw_events = armpmu_get_cpu_events;
+ cpu_pmu->get_hw_events = armpmu_get_cpu_events;
+
+ /* Ensure the PMU has sane values out of reset. */
+ if (cpu_pmu && cpu_pmu->reset)
+ on_each_cpu(cpu_pmu->reset, NULL, 1);
}
/*
@@ -722,41 +667,68 @@ static struct notifier_block __cpuinitdata pmu_cpu_notifier = {
.notifier_call = pmu_cpu_notify,
};
+static const struct dev_pm_ops armpmu_dev_pm_ops = {
+ SET_RUNTIME_PM_OPS(armpmu_runtime_suspend, armpmu_runtime_resume, NULL)
+};
+
+/*
+ * PMU platform driver and devicetree bindings.
+ */
+static struct of_device_id __devinitdata cpu_pmu_of_device_ids[] = {
+ {.compatible = "arm,cortex-a15-pmu", .data = armv7_a15_pmu_init},
+ {.compatible = "arm,cortex-a9-pmu", .data = armv7_a9_pmu_init},
+ {.compatible = "arm,cortex-a8-pmu", .data = armv7_a8_pmu_init},
+ {.compatible = "arm,cortex-a7-pmu", .data = armv7_a7_pmu_init},
+ {.compatible = "arm,cortex-a5-pmu", .data = armv7_a5_pmu_init},
+ {.compatible = "arm,arm11mpcore-pmu", .data = armv6mpcore_pmu_init},
+ {.compatible = "arm,arm1176-pmu", .data = armv6pmu_init},
+ {.compatible = "arm,arm1136-pmu", .data = armv6pmu_init},
+ {},
+};
+
+static struct platform_device_id __devinitdata cpu_pmu_plat_device_ids[] = {
+ {.name = "arm-pmu"},
+ {},
+};
+
/*
- * CPU PMU identification and registration.
+ * CPU PMU identification and probing.
*/
-static int __init
-init_hw_perf_events(void)
+static struct arm_pmu *__devinit probe_current_pmu(void)
{
+ struct arm_pmu *pmu = NULL;
+ int cpu = get_cpu();
unsigned long cpuid = read_cpuid_id();
unsigned long implementor = (cpuid & 0xFF000000) >> 24;
unsigned long part_number = (cpuid & 0xFFF0);
+ pr_info("probing PMU on CPU %d\n", cpu);
+
/* ARM Ltd CPUs. */
if (0x41 == implementor) {
switch (part_number) {
case 0xB360: /* ARM1136 */
case 0xB560: /* ARM1156 */
case 0xB760: /* ARM1176 */
- cpu_pmu = armv6pmu_init();
+ pmu = armv6pmu_init();
break;
case 0xB020: /* ARM11mpcore */
- cpu_pmu = armv6mpcore_pmu_init();
+ pmu = armv6mpcore_pmu_init();
break;
case 0xC080: /* Cortex-A8 */
- cpu_pmu = armv7_a8_pmu_init();
+ pmu = armv7_a8_pmu_init();
break;
case 0xC090: /* Cortex-A9 */
- cpu_pmu = armv7_a9_pmu_init();
+ pmu = armv7_a9_pmu_init();
break;
case 0xC050: /* Cortex-A5 */
- cpu_pmu = armv7_a5_pmu_init();
+ pmu = armv7_a5_pmu_init();
break;
case 0xC0F0: /* Cortex-A15 */
- cpu_pmu = armv7_a15_pmu_init();
+ pmu = armv7_a15_pmu_init();
break;
case 0xC070: /* Cortex-A7 */
- cpu_pmu = armv7_a7_pmu_init();
+ pmu = armv7_a7_pmu_init();
break;
}
/* Intel CPUs [xscale]. */
@@ -764,27 +736,62 @@ init_hw_perf_events(void)
part_number = (cpuid >> 13) & 0x7;
switch (part_number) {
case 1:
- cpu_pmu = xscale1pmu_init();
+ pmu = xscale1pmu_init();
break;
case 2:
- cpu_pmu = xscale2pmu_init();
+ pmu = xscale2pmu_init();
break;
}
}
+ put_cpu();
+ return pmu;
+}
+
+static int __devinit cpu_pmu_device_probe(struct platform_device *pdev)
+{
+ const struct of_device_id *of_id;
+ struct arm_pmu *(*init_fn)(void);
+ struct device_node *node = pdev->dev.of_node;
+
if (cpu_pmu) {
- pr_info("enabled with %s PMU driver, %d counters available\n",
- cpu_pmu->name, cpu_pmu->num_events);
- cpu_pmu_init(cpu_pmu);
- register_cpu_notifier(&pmu_cpu_notifier);
- armpmu_register(cpu_pmu, cpu_pmu->name, PERF_TYPE_RAW);
+ pr_info("attempt to register multiple PMU devices!");
+ return -ENOSPC;
+ }
+
+ if (node && (of_id = of_match_node(cpu_pmu_of_device_ids, pdev->dev.of_node))) {
+ init_fn = of_id->data;
+ cpu_pmu = init_fn();
} else {
- pr_info("no hardware support available\n");
+ cpu_pmu = probe_current_pmu();
}
+ if (!cpu_pmu)
+ return -ENODEV;
+
+ cpu_pmu->plat_device = pdev;
+ cpu_pmu_init(cpu_pmu);
+ register_cpu_notifier(&pmu_cpu_notifier);
+ armpmu_register(cpu_pmu, cpu_pmu->name, PERF_TYPE_RAW);
+
return 0;
}
-early_initcall(init_hw_perf_events);
+
+static struct platform_driver cpu_pmu_driver = {
+ .driver = {
+ .name = "arm-pmu",
+ .pm = &armpmu_dev_pm_ops,
+ .of_match_table = cpu_pmu_of_device_ids,
+ },
+ .probe = cpu_pmu_device_probe,
+ .id_table = cpu_pmu_plat_device_ids,
+};
+
+static int __init register_pmu_driver(void)
+{
+ return platform_driver_register(&cpu_pmu_driver);
+}
+device_initcall(register_pmu_driver);
/*
* Callchain handling code.
diff --git a/arch/arm/kernel/perf_event_v6.c b/arch/arm/kernel/perf_event_v6.c
index c90fcb2b696..a4328b12eed 100644
--- a/arch/arm/kernel/perf_event_v6.c
+++ b/arch/arm/kernel/perf_event_v6.c
@@ -664,7 +664,7 @@ static struct arm_pmu armv6pmu = {
.max_period = (1LLU << 32) - 1,
};
-static struct arm_pmu *__init armv6pmu_init(void)
+static struct arm_pmu *__devinit armv6pmu_init(void)
{
return &armv6pmu;
}
@@ -698,17 +698,17 @@ static struct arm_pmu armv6mpcore_pmu = {
.max_period = (1LLU << 32) - 1,
};
-static struct arm_pmu *__init armv6mpcore_pmu_init(void)
+static struct arm_pmu *__devinit armv6mpcore_pmu_init(void)
{
return &armv6mpcore_pmu;
}
#else
-static struct arm_pmu *__init armv6pmu_init(void)
+static struct arm_pmu *__devinit armv6pmu_init(void)
{
return NULL;
}
-static struct arm_pmu *__init armv6mpcore_pmu_init(void)
+static struct arm_pmu *__devinit armv6mpcore_pmu_init(void)
{
return NULL;
}
diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c
index f04070bd218..d65a1b82e13 100644
--- a/arch/arm/kernel/perf_event_v7.c
+++ b/arch/arm/kernel/perf_event_v7.c
@@ -1245,7 +1245,7 @@ static struct arm_pmu armv7pmu = {
.max_period = (1LLU << 32) - 1,
};
-static u32 __init armv7_read_num_pmnc_events(void)
+static u32 __devinit armv7_read_num_pmnc_events(void)
{
u32 nb_cnt;
@@ -1256,7 +1256,7 @@ static u32 __init armv7_read_num_pmnc_events(void)
return nb_cnt + 1;
}
-static struct arm_pmu *__init armv7_a8_pmu_init(void)
+static struct arm_pmu *__devinit armv7_a8_pmu_init(void)
{
armv7pmu.name = "ARMv7 Cortex-A8";
armv7pmu.map_event = armv7_a8_map_event;
@@ -1264,7 +1264,7 @@ static struct arm_pmu *__init armv7_a8_pmu_init(void)
return &armv7pmu;
}
-static struct arm_pmu *__init armv7_a9_pmu_init(void)
+static struct arm_pmu *__devinit armv7_a9_pmu_init(void)
{
armv7pmu.name = "ARMv7 Cortex-A9";
armv7pmu.map_event = armv7_a9_map_event;
@@ -1272,7 +1272,7 @@ static struct arm_pmu *__init armv7_a9_pmu_init(void)
return &armv7pmu;
}
-static struct arm_pmu *__init armv7_a5_pmu_init(void)
+static struct arm_pmu *__devinit armv7_a5_pmu_init(void)
{
armv7pmu.name = "ARMv7 Cortex-A5";
armv7pmu.map_event = armv7_a5_map_event;
@@ -1280,7 +1280,7 @@ static struct arm_pmu *__init armv7_a5_pmu_init(void)
return &armv7pmu;
}
-static struct arm_pmu *__init armv7_a15_pmu_init(void)
+static struct arm_pmu *__devinit armv7_a15_pmu_init(void)
{
armv7pmu.name = "ARMv7 Cortex-A15";
armv7pmu.map_event = armv7_a15_map_event;
@@ -1289,7 +1289,7 @@ static struct arm_pmu *__init armv7_a15_pmu_init(void)
return &armv7pmu;
}
-static struct arm_pmu *__init armv7_a7_pmu_init(void)
+static struct arm_pmu *__devinit armv7_a7_pmu_init(void)
{
armv7pmu.name = "ARMv7 Cortex-A7";
armv7pmu.map_event = armv7_a7_map_event;
@@ -1298,27 +1298,27 @@ static struct arm_pmu *__init armv7_a7_pmu_init(void)
return &armv7pmu;
}
#else
-static struct arm_pmu *__init armv7_a8_pmu_init(void)
+static struct arm_pmu *__devinit armv7_a8_pmu_init(void)
{
return NULL;
}
-static struct arm_pmu *__init armv7_a9_pmu_init(void)
+static struct arm_pmu *__devinit armv7_a9_pmu_init(void)
{
return NULL;
}
-static struct arm_pmu *__init armv7_a5_pmu_init(void)
+static struct arm_pmu *__devinit armv7_a5_pmu_init(void)
{
return NULL;
}
-static struct arm_pmu *__init armv7_a15_pmu_init(void)
+static struct arm_pmu *__devinit armv7_a15_pmu_init(void)
{
return NULL;
}
-static struct arm_pmu *__init armv7_a7_pmu_init(void)
+static struct arm_pmu *__devinit armv7_a7_pmu_init(void)
{
return NULL;
}
diff --git a/arch/arm/kernel/perf_event_xscale.c b/arch/arm/kernel/perf_event_xscale.c
index f759fe0bab6..dcc478c0745 100644
--- a/arch/arm/kernel/perf_event_xscale.c
+++ b/arch/arm/kernel/perf_event_xscale.c
@@ -449,7 +449,7 @@ static struct arm_pmu xscale1pmu = {
.max_period = (1LLU << 32) - 1,
};
-static struct arm_pmu *__init xscale1pmu_init(void)
+static struct arm_pmu *__devinit xscale1pmu_init(void)
{
return &xscale1pmu;
}
@@ -816,17 +816,17 @@ static struct arm_pmu xscale2pmu = {
.max_period = (1LLU << 32) - 1,
};
-static struct arm_pmu *__init xscale2pmu_init(void)
+static struct arm_pmu *__devinit xscale2pmu_init(void)
{
return &xscale2pmu;
}
#else
-static struct arm_pmu *__init xscale1pmu_init(void)
+static struct arm_pmu *__devinit xscale1pmu_init(void)
{
return NULL;
}
-static struct arm_pmu *__init xscale2pmu_init(void)
+static struct arm_pmu *__devinit xscale2pmu_init(void)
{
return NULL;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-27 13:40:50 +0000