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-rw-r--r--arch/alpha/kernel/perf_event.c2
-rw-r--r--arch/arm/kernel/perf_event.c2
-rw-r--r--arch/powerpc/kernel/perf_event.c2
-rw-r--r--arch/powerpc/kernel/perf_event_fsl_emb.c2
-rw-r--r--arch/sh/kernel/perf_event.c2
-rw-r--r--arch/sparc/kernel/perf_event.c2
-rw-r--r--arch/x86/kernel/cpu/perf_event.c2
-rw-r--r--include/linux/perf_event.h5
-rw-r--r--kernel/hw_breakpoint.c2
-rw-r--r--kernel/perf_event.c48
10 files changed, 54 insertions, 15 deletions
diff --git a/arch/alpha/kernel/perf_event.c b/arch/alpha/kernel/perf_event.c
index 3283059b6e8..90561c45e7d 100644
--- a/arch/alpha/kernel/perf_event.c
+++ b/arch/alpha/kernel/perf_event.c
@@ -882,7 +882,7 @@ int __init init_hw_perf_events(void)
/* And set up PMU specification */
alpha_pmu = &ev67_pmu;
- perf_pmu_register(&pmu);
+ perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
return 0;
}
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
index d45f70e5f2e..fdfa4976b0b 100644
--- a/arch/arm/kernel/perf_event.c
+++ b/arch/arm/kernel/perf_event.c
@@ -3034,7 +3034,7 @@ init_hw_perf_events(void)
pr_info("no hardware support available\n");
}
- perf_pmu_register(&pmu);
+ perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
return 0;
}
diff --git a/arch/powerpc/kernel/perf_event.c b/arch/powerpc/kernel/perf_event.c
index 3129c855933..56748070578 100644
--- a/arch/powerpc/kernel/perf_event.c
+++ b/arch/powerpc/kernel/perf_event.c
@@ -1379,7 +1379,7 @@ int register_power_pmu(struct power_pmu *pmu)
freeze_events_kernel = MMCR0_FCHV;
#endif /* CONFIG_PPC64 */
- perf_pmu_register(&power_pmu);
+ perf_pmu_register(&power_pmu, "cpu", PERF_TYPE_RAW);
perf_cpu_notifier(power_pmu_notifier);
return 0;
diff --git a/arch/powerpc/kernel/perf_event_fsl_emb.c b/arch/powerpc/kernel/perf_event_fsl_emb.c
index 7ecca59ddf7..4dcf5f831e9 100644
--- a/arch/powerpc/kernel/perf_event_fsl_emb.c
+++ b/arch/powerpc/kernel/perf_event_fsl_emb.c
@@ -681,7 +681,7 @@ int register_fsl_emb_pmu(struct fsl_emb_pmu *pmu)
pr_info("%s performance monitor hardware support registered\n",
pmu->name);
- perf_pmu_register(&fsl_emb_pmu);
+ perf_pmu_register(&fsl_emb_pmu, "cpu", PERF_TYPE_RAW);
return 0;
}
diff --git a/arch/sh/kernel/perf_event.c b/arch/sh/kernel/perf_event.c
index 5a4b3343565..2ee21a47b5a 100644
--- a/arch/sh/kernel/perf_event.c
+++ b/arch/sh/kernel/perf_event.c
@@ -389,7 +389,7 @@ int __cpuinit register_sh_pmu(struct sh_pmu *_pmu)
WARN_ON(_pmu->num_events > MAX_HWEVENTS);
- perf_pmu_register(&pmu);
+ perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
perf_cpu_notifier(sh_pmu_notifier);
return 0;
}
diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index 39348b1cebd..760578687e7 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -1318,7 +1318,7 @@ int __init init_hw_perf_events(void)
pr_cont("Supported PMU type is '%s'\n", sparc_pmu_type);
- perf_pmu_register(&pmu);
+ perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
register_die_notifier(&perf_event_nmi_notifier);
return 0;
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c
index ce27c547fe7..0a360d14659 100644
--- a/arch/x86/kernel/cpu/perf_event.c
+++ b/arch/x86/kernel/cpu/perf_event.c
@@ -1465,7 +1465,7 @@ int __init init_hw_perf_events(void)
pr_info("... fixed-purpose events: %d\n", x86_pmu.num_counters_fixed);
pr_info("... event mask: %016Lx\n", x86_pmu.intel_ctrl);
- perf_pmu_register(&pmu);
+ perf_pmu_register(&pmu, "cpu", PERF_TYPE_RAW);
perf_cpu_notifier(x86_pmu_notifier);
return 0;
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 30e50e2c7f3..21206d27466 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -588,6 +588,9 @@ struct perf_event;
struct pmu {
struct list_head entry;
+ char *name;
+ int type;
+
int * __percpu pmu_disable_count;
struct perf_cpu_context * __percpu pmu_cpu_context;
int task_ctx_nr;
@@ -916,7 +919,7 @@ struct perf_output_handle {
#ifdef CONFIG_PERF_EVENTS
-extern int perf_pmu_register(struct pmu *pmu);
+extern int perf_pmu_register(struct pmu *pmu, char *name, int type);
extern void perf_pmu_unregister(struct pmu *pmu);
extern int perf_num_counters(void);
diff --git a/kernel/hw_breakpoint.c b/kernel/hw_breakpoint.c
index e5325825aeb..086adf25a55 100644
--- a/kernel/hw_breakpoint.c
+++ b/kernel/hw_breakpoint.c
@@ -641,7 +641,7 @@ int __init init_hw_breakpoint(void)
constraints_initialized = 1;
- perf_pmu_register(&perf_breakpoint);
+ perf_pmu_register(&perf_breakpoint, "breakpoint", PERF_TYPE_BREAKPOINT);
return register_die_notifier(&hw_breakpoint_exceptions_nb);
diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index a3d568fbacc..8f09bc877a3 100644
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -13,6 +13,7 @@
#include <linux/mm.h>
#include <linux/cpu.h>
#include <linux/smp.h>
+#include <linux/idr.h>
#include <linux/file.h>
#include <linux/poll.h>
#include <linux/slab.h>
@@ -4961,7 +4962,7 @@ static struct pmu perf_tracepoint = {
static inline void perf_tp_register(void)
{
- perf_pmu_register(&perf_tracepoint);
+ perf_pmu_register(&perf_tracepoint, "tracepoint", PERF_TYPE_TRACEPOINT);
}
static int perf_event_set_filter(struct perf_event *event, void __user *arg)
@@ -5305,8 +5306,9 @@ static void free_pmu_context(struct pmu *pmu)
out:
mutex_unlock(&pmus_lock);
}
+static struct idr pmu_idr;
-int perf_pmu_register(struct pmu *pmu)
+int perf_pmu_register(struct pmu *pmu, char *name, int type)
{
int cpu, ret;
@@ -5316,13 +5318,32 @@ int perf_pmu_register(struct pmu *pmu)
if (!pmu->pmu_disable_count)
goto unlock;
+ pmu->type = -1;
+ if (!name)
+ goto skip_type;
+ pmu->name = name;
+
+ if (type < 0) {
+ int err = idr_pre_get(&pmu_idr, GFP_KERNEL);
+ if (!err)
+ goto free_pdc;
+
+ err = idr_get_new_above(&pmu_idr, pmu, PERF_TYPE_MAX, &type);
+ if (err) {
+ ret = err;
+ goto free_pdc;
+ }
+ }
+ pmu->type = type;
+
+skip_type:
pmu->pmu_cpu_context = find_pmu_context(pmu->task_ctx_nr);
if (pmu->pmu_cpu_context)
goto got_cpu_context;
pmu->pmu_cpu_context = alloc_percpu(struct perf_cpu_context);
if (!pmu->pmu_cpu_context)
- goto free_pdc;
+ goto free_ird;
for_each_possible_cpu(cpu) {
struct perf_cpu_context *cpuctx;
@@ -5366,6 +5387,10 @@ unlock:
return ret;
+free_idr:
+ if (pmu->type >= PERF_TYPE_MAX)
+ idr_remove(&pmu_idr, pmu->type);
+
free_pdc:
free_percpu(pmu->pmu_disable_count);
goto unlock;
@@ -5385,6 +5410,8 @@ void perf_pmu_unregister(struct pmu *pmu)
synchronize_rcu();
free_percpu(pmu->pmu_disable_count);
+ if (pmu->type >= PERF_TYPE_MAX)
+ idr_remove(&pmu_idr, pmu->type);
free_pmu_context(pmu);
}
@@ -5394,6 +5421,13 @@ struct pmu *perf_init_event(struct perf_event *event)
int idx;
idx = srcu_read_lock(&pmus_srcu);
+
+ rcu_read_lock();
+ pmu = idr_find(&pmu_idr, event->attr.type);
+ rcu_read_unlock();
+ if (pmu)
+ goto unlock;
+
list_for_each_entry_rcu(pmu, &pmus, entry) {
int ret = pmu->event_init(event);
if (!ret)
@@ -6555,11 +6589,13 @@ void __init perf_event_init(void)
{
int ret;
+ idr_init(&pmu_idr);
+
perf_event_init_all_cpus();
init_srcu_struct(&pmus_srcu);
- perf_pmu_register(&perf_swevent);
- perf_pmu_register(&perf_cpu_clock);
- perf_pmu_register(&perf_task_clock);
+ perf_pmu_register(&perf_swevent, "software", PERF_TYPE_SOFTWARE);
+ perf_pmu_register(&perf_cpu_clock, NULL, -1);
+ perf_pmu_register(&perf_task_clock, NULL, -1);
perf_tp_register();
perf_cpu_notifier(perf_cpu_notify);
register_reboot_notifier(&perf_reboot_notifier);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-01 04:57:48 +0000