ARM: perf: move CPU-specific PMU handling code into separate file

This patch moves the CPU-specific PMU handling code out of perf_event.c
and into perf_event_cpu.c.

Signed-off-by: Will Deacon <will.deacon@arm.com>

1 files changed, 1 insertions, 210 deletions

diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index 9e3afd1994d9..86fd39937171 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -12,54 +12,15 @@
  */
 #define pr_fmt(fmt) "hw perfevents: " fmt
 
-#include <linux/bitmap.h>
-#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>
-#include <linux/uaccess.h>
 #include <linux/pm_runtime.h>
+#include <linux/uaccess.h>
 
-#include <asm/cputype.h>
-#include <asm/irq.h>
 #include <asm/irq_regs.h>
 #include <asm/pmu.h>
 #include <asm/stacktrace.h>
 
-/* Set at runtime when we know what CPU type we are. */
-static struct arm_pmu *cpu_pmu;
-
-static DEFINE_PER_CPU(struct perf_event * [ARMPMU_MAX_HWEVENTS], hw_events);
-static DEFINE_PER_CPU(unsigned long [BITS_TO_LONGS(ARMPMU_MAX_HWEVENTS)], used_mask);
-static DEFINE_PER_CPU(struct pmu_hw_events, cpu_hw_events);
-
-/*
- * Despite the names, these two functions are CPU-specific and are used
- * by the OProfile/perf code.
- */
-const char *perf_pmu_name(void)
-{
-	if (!cpu_pmu)
-		return NULL;
-
-	return cpu_pmu->pmu.name;
-}
-EXPORT_SYMBOL_GPL(perf_pmu_name);
-
-int perf_num_counters(void)
-{
-	int max_events = 0;
-
-	if (cpu_pmu != NULL)
-		max_events = cpu_pmu->num_events;
-
-	return max_events;
-}
-EXPORT_SYMBOL_GPL(perf_num_counters);
-
 static int
 armpmu_map_cache_event(const unsigned (*cache_map)
 				      [PERF_COUNT_HW_CACHE_MAX]
@@ -608,176 +569,6 @@ int armpmu_register(struct arm_pmu *armpmu, char *name, int type)
 	return perf_pmu_register(&armpmu->pmu, name, type);
 }
 
-/* Include the PMU-specific implementations. */
-#include "perf_event_xscale.c"
-#include "perf_event_v6.c"
-#include "perf_event_v7.c"
-
-static struct pmu_hw_events *cpu_pmu_get_cpu_events(void)
-{
-	return &__get_cpu_var(cpu_hw_events);
-}
-
-static void __devinit cpu_pmu_init(struct arm_pmu *cpu_pmu)
-{
-	int cpu;
-	for_each_possible_cpu(cpu) {
-		struct pmu_hw_events *events = &per_cpu(cpu_hw_events, cpu);
-		events->events = per_cpu(hw_events, cpu);
-		events->used_mask = per_cpu(used_mask, cpu);
-		raw_spin_lock_init(&events->pmu_lock);
-	}
-	cpu_pmu->get_hw_events = cpu_pmu_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);
-}
-
-/*
- * PMU hardware loses all context when a CPU goes offline.
- * When a CPU is hotplugged back in, since some hardware registers are
- * UNKNOWN at reset, the PMU must be explicitly reset to avoid reading
- * junk values out of them.
- */
-static int __cpuinit cpu_pmu_notify(struct notifier_block *b,
-				    unsigned long action, void *hcpu)
-{
-	if ((action & ~CPU_TASKS_FROZEN) != CPU_STARTING)
-		return NOTIFY_DONE;
-
-	if (cpu_pmu && cpu_pmu->reset)
-		cpu_pmu->reset(NULL);
-
-	return NOTIFY_OK;
-}
-
-static struct notifier_block __cpuinitdata cpu_pmu_hotplug_notifier = {
-	.notifier_call = cpu_pmu_notify,
-};
-
-/*
- * 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 probing.
- */
-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 */
-			pmu = armv6pmu_init();
-			break;
-		case 0xB020:	/* ARM11mpcore */
-			pmu = armv6mpcore_pmu_init();
-			break;
-		case 0xC080:	/* Cortex-A8 */
-			pmu = armv7_a8_pmu_init();
-			break;
-		case 0xC090:	/* Cortex-A9 */
-			pmu = armv7_a9_pmu_init();
-			break;
-		case 0xC050:	/* Cortex-A5 */
-			pmu = armv7_a5_pmu_init();
-			break;
-		case 0xC0F0:	/* Cortex-A15 */
-			pmu = armv7_a15_pmu_init();
-			break;
-		case 0xC070:	/* Cortex-A7 */
-			pmu = armv7_a7_pmu_init();
-			break;
-		}
-	/* Intel CPUs [xscale]. */
-	} else if (0x69 == implementor) {
-		part_number = (cpuid >> 13) & 0x7;
-		switch (part_number) {
-		case 1:
-			pmu = xscale1pmu_init();
-			break;
-		case 2:
-			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("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 {
-		cpu_pmu = probe_current_pmu();
-	}
-
-	if (!cpu_pmu)
-		return -ENODEV;
-
-	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);
-
-	return 0;
-}
-
-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.
  */