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Diffstat (limited to 'arch/arm/kernel/perf_event_cpu.c')
-rw-r--r--arch/arm/kernel/perf_event_cpu.c125
1 files changed, 76 insertions, 49 deletions
diff --git a/arch/arm/kernel/perf_event_cpu.c b/arch/arm/kernel/perf_event_cpu.c
index 8d7d8d4de9d6..1f2740e3dbc0 100644
--- a/arch/arm/kernel/perf_event_cpu.c
+++ b/arch/arm/kernel/perf_event_cpu.c
@@ -23,6 +23,7 @@
#include <linux/kernel.h>
#include <linux/of.h>
#include <linux/platform_device.h>
+#include <linux/slab.h>
#include <linux/spinlock.h>
#include <asm/cputype.h>
@@ -45,7 +46,7 @@ const char *perf_pmu_name(void)
if (!cpu_pmu)
return NULL;
- return cpu_pmu->pmu.name;
+ return cpu_pmu->name;
}
EXPORT_SYMBOL_GPL(perf_pmu_name);
@@ -70,7 +71,7 @@ static struct pmu_hw_events *cpu_pmu_get_cpu_events(void)
return &__get_cpu_var(cpu_hw_events);
}
-static void cpu_pmu_free_irq(void)
+static void cpu_pmu_free_irq(struct arm_pmu *cpu_pmu)
{
int i, irq, irqs;
struct platform_device *pmu_device = cpu_pmu->plat_device;
@@ -86,7 +87,7 @@ static void cpu_pmu_free_irq(void)
}
}
-static int cpu_pmu_request_irq(irq_handler_t handler)
+static int cpu_pmu_request_irq(struct arm_pmu *cpu_pmu, irq_handler_t handler)
{
int i, err, irq, irqs;
struct platform_device *pmu_device = cpu_pmu->plat_device;
@@ -131,7 +132,7 @@ static int cpu_pmu_request_irq(irq_handler_t handler)
return 0;
}
-static void __devinit cpu_pmu_init(struct arm_pmu *cpu_pmu)
+static void cpu_pmu_init(struct arm_pmu *cpu_pmu)
{
int cpu;
for_each_possible_cpu(cpu) {
@@ -146,8 +147,8 @@ static void __devinit cpu_pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->free_irq = cpu_pmu_free_irq;
/* Ensure the PMU has sane values out of reset. */
- if (cpu_pmu && cpu_pmu->reset)
- on_each_cpu(cpu_pmu->reset, NULL, 1);
+ if (cpu_pmu->reset)
+ on_each_cpu(cpu_pmu->reset, cpu_pmu, 1);
}
/*
@@ -163,7 +164,9 @@ static int __cpuinit cpu_pmu_notify(struct notifier_block *b,
return NOTIFY_DONE;
if (cpu_pmu && cpu_pmu->reset)
- cpu_pmu->reset(NULL);
+ cpu_pmu->reset(cpu_pmu);
+ else
+ return NOTIFY_DONE;
return NOTIFY_OK;
}
@@ -175,7 +178,7 @@ static struct notifier_block __cpuinitdata cpu_pmu_hotplug_notifier = {
/*
* PMU platform driver and devicetree bindings.
*/
-static struct of_device_id __devinitdata cpu_pmu_of_device_ids[] = {
+static struct of_device_id 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},
@@ -187,7 +190,7 @@ static struct of_device_id __devinitdata cpu_pmu_of_device_ids[] = {
{},
};
-static struct platform_device_id __devinitdata cpu_pmu_plat_device_ids[] = {
+static struct platform_device_id cpu_pmu_plat_device_ids[] = {
{.name = "arm-pmu"},
{},
};
@@ -195,87 +198,101 @@ static struct platform_device_id __devinitdata cpu_pmu_plat_device_ids[] = {
/*
* CPU PMU identification and probing.
*/
-static struct arm_pmu *__devinit probe_current_pmu(void)
+static int probe_current_pmu(struct arm_pmu *pmu)
{
- 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);
+ unsigned long implementor = read_cpuid_implementor();
+ unsigned long part_number = read_cpuid_part_number();
+ int ret = -ENODEV;
pr_info("probing PMU on CPU %d\n", cpu);
/* ARM Ltd CPUs. */
- if (0x41 == implementor) {
+ if (implementor == ARM_CPU_IMP_ARM) {
switch (part_number) {
- case 0xB360: /* ARM1136 */
- case 0xB560: /* ARM1156 */
- case 0xB760: /* ARM1176 */
- pmu = armv6pmu_init();
+ case ARM_CPU_PART_ARM1136:
+ case ARM_CPU_PART_ARM1156:
+ case ARM_CPU_PART_ARM1176:
+ ret = armv6pmu_init(pmu);
break;
- case 0xB020: /* ARM11mpcore */
- pmu = armv6mpcore_pmu_init();
+ case ARM_CPU_PART_ARM11MPCORE:
+ ret = armv6mpcore_pmu_init(pmu);
break;
- case 0xC080: /* Cortex-A8 */
- pmu = armv7_a8_pmu_init();
+ case ARM_CPU_PART_CORTEX_A8:
+ ret = armv7_a8_pmu_init(pmu);
break;
- case 0xC090: /* Cortex-A9 */
- pmu = armv7_a9_pmu_init();
+ case ARM_CPU_PART_CORTEX_A9:
+ ret = armv7_a9_pmu_init(pmu);
break;
- case 0xC050: /* Cortex-A5 */
- pmu = armv7_a5_pmu_init();
+ case ARM_CPU_PART_CORTEX_A5:
+ ret = armv7_a5_pmu_init(pmu);
break;
- case 0xC0F0: /* Cortex-A15 */
- pmu = armv7_a15_pmu_init();
+ case ARM_CPU_PART_CORTEX_A15:
+ ret = armv7_a15_pmu_init(pmu);
break;
- case 0xC070: /* Cortex-A7 */
- pmu = armv7_a7_pmu_init();
+ case ARM_CPU_PART_CORTEX_A7:
+ ret = armv7_a7_pmu_init(pmu);
break;
}
/* Intel CPUs [xscale]. */
- } else if (0x69 == implementor) {
- part_number = (cpuid >> 13) & 0x7;
- switch (part_number) {
- case 1:
- pmu = xscale1pmu_init();
+ } else if (implementor == ARM_CPU_IMP_INTEL) {
+ switch (xscale_cpu_arch_version()) {
+ case ARM_CPU_XSCALE_ARCH_V1:
+ ret = xscale1pmu_init(pmu);
break;
- case 2:
- pmu = xscale2pmu_init();
+ case ARM_CPU_XSCALE_ARCH_V2:
+ ret = xscale2pmu_init(pmu);
break;
}
}
put_cpu();
- return pmu;
+ return ret;
}
-static int __devinit cpu_pmu_device_probe(struct platform_device *pdev)
+static int cpu_pmu_device_probe(struct platform_device *pdev)
{
const struct of_device_id *of_id;
- struct arm_pmu *(*init_fn)(void);
+ int (*init_fn)(struct arm_pmu *);
struct device_node *node = pdev->dev.of_node;
+ struct arm_pmu *pmu;
+ int ret = -ENODEV;
if (cpu_pmu) {
pr_info("attempt to register multiple PMU devices!");
return -ENOSPC;
}
+ pmu = kzalloc(sizeof(struct arm_pmu), GFP_KERNEL);
+ if (!pmu) {
+ pr_info("failed to allocate PMU device!");
+ return -ENOMEM;
+ }
+
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();
+ ret = init_fn(pmu);
} else {
- cpu_pmu = probe_current_pmu();
+ ret = probe_current_pmu(pmu);
}
- if (!cpu_pmu)
- return -ENODEV;
+ if (ret) {
+ pr_info("failed to probe PMU!");
+ goto out_free;
+ }
+ cpu_pmu = pmu;
cpu_pmu->plat_device = pdev;
cpu_pmu_init(cpu_pmu);
- register_cpu_notifier(&cpu_pmu_hotplug_notifier);
- armpmu_register(cpu_pmu, cpu_pmu->name, PERF_TYPE_RAW);
+ ret = armpmu_register(cpu_pmu, PERF_TYPE_RAW);
- return 0;
+ if (!ret)
+ return 0;
+
+out_free:
+ pr_info("failed to register PMU devices!");
+ kfree(pmu);
+ return ret;
}
static struct platform_driver cpu_pmu_driver = {
@@ -290,6 +307,16 @@ static struct platform_driver cpu_pmu_driver = {
static int __init register_pmu_driver(void)
{
- return platform_driver_register(&cpu_pmu_driver);
+ int err;
+
+ err = register_cpu_notifier(&cpu_pmu_hotplug_notifier);
+ if (err)
+ return err;
+
+ err = platform_driver_register(&cpu_pmu_driver);
+ if (err)
+ unregister_cpu_notifier(&cpu_pmu_hotplug_notifier);
+
+ return err;
}
device_initcall(register_pmu_driver);
generated by cgit v1.2.3 (git 2.0.4) at 2025-09-12 02:47:09 +0000