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-rw-r--r--arch/arm/include/asm/perf_event.h4
-rw-r--r--arch/frv/include/asm/perf_event.h2
-rw-r--r--arch/hexagon/include/asm/perf_event.h2
-rw-r--r--arch/powerpc/include/asm/perf_event_server.h2
-rw-r--r--arch/powerpc/kernel/perf_event.c6
-rw-r--r--arch/s390/include/asm/perf_event.h1
-rw-r--r--arch/x86/include/asm/perf_event.h2
-rw-r--r--include/linux/perf_event.h6
-rw-r--r--kernel/events/core.c27
-rw-r--r--kernel/events/hw_breakpoint.c7
10 files changed, 41 insertions, 18 deletions
diff --git a/arch/arm/include/asm/perf_event.h b/arch/arm/include/asm/perf_event.h
index 0f8e3827a89..08f94d8fc04 100644
--- a/arch/arm/include/asm/perf_event.h
+++ b/arch/arm/include/asm/perf_event.h
@@ -12,10 +12,6 @@
#ifndef __ARM_PERF_EVENT_H__
#define __ARM_PERF_EVENT_H__
-/* ARM performance counters start from 1 (in the cp15 accesses) so use the
- * same indexes here for consistency. */
-#define PERF_EVENT_INDEX_OFFSET 1
-
/* ARM perf PMU IDs for use by internal perf clients. */
enum arm_perf_pmu_ids {
ARM_PERF_PMU_ID_XSCALE1 = 0,
diff --git a/arch/frv/include/asm/perf_event.h b/arch/frv/include/asm/perf_event.h
index a69e0155d14..c52ea5546b5 100644
--- a/arch/frv/include/asm/perf_event.h
+++ b/arch/frv/include/asm/perf_event.h
@@ -12,6 +12,4 @@
#ifndef _ASM_PERF_EVENT_H
#define _ASM_PERF_EVENT_H
-#define PERF_EVENT_INDEX_OFFSET 0
-
#endif /* _ASM_PERF_EVENT_H */
diff --git a/arch/hexagon/include/asm/perf_event.h b/arch/hexagon/include/asm/perf_event.h
index 6c2910f9118..8b8526b491c 100644
--- a/arch/hexagon/include/asm/perf_event.h
+++ b/arch/hexagon/include/asm/perf_event.h
@@ -19,6 +19,4 @@
#ifndef _ASM_PERF_EVENT_H
#define _ASM_PERF_EVENT_H
-#define PERF_EVENT_INDEX_OFFSET 0
-
#endif /* _ASM_PERF_EVENT_H */
diff --git a/arch/powerpc/include/asm/perf_event_server.h b/arch/powerpc/include/asm/perf_event_server.h
index 8f1df1208d2..1a8093fa8f7 100644
--- a/arch/powerpc/include/asm/perf_event_server.h
+++ b/arch/powerpc/include/asm/perf_event_server.h
@@ -61,8 +61,6 @@ struct pt_regs;
extern unsigned long perf_misc_flags(struct pt_regs *regs);
extern unsigned long perf_instruction_pointer(struct pt_regs *regs);
-#define PERF_EVENT_INDEX_OFFSET 1
-
/*
* Only override the default definitions in include/linux/perf_event.h
* if we have hardware PMU support.
diff --git a/arch/powerpc/kernel/perf_event.c b/arch/powerpc/kernel/perf_event.c
index 10a140f82cb..d614ab57ccc 100644
--- a/arch/powerpc/kernel/perf_event.c
+++ b/arch/powerpc/kernel/perf_event.c
@@ -1187,6 +1187,11 @@ static int power_pmu_event_init(struct perf_event *event)
return err;
}
+static int power_pmu_event_idx(struct perf_event *event)
+{
+ return event->hw.idx;
+}
+
struct pmu power_pmu = {
.pmu_enable = power_pmu_enable,
.pmu_disable = power_pmu_disable,
@@ -1199,6 +1204,7 @@ struct pmu power_pmu = {
.start_txn = power_pmu_start_txn,
.cancel_txn = power_pmu_cancel_txn,
.commit_txn = power_pmu_commit_txn,
+ .event_idx = power_pmu_event_idx,
};
/*
diff --git a/arch/s390/include/asm/perf_event.h b/arch/s390/include/asm/perf_event.h
index a75f168d271..4eb444edbe4 100644
--- a/arch/s390/include/asm/perf_event.h
+++ b/arch/s390/include/asm/perf_event.h
@@ -6,4 +6,3 @@
/* Empty, just to avoid compiling error */
-#define PERF_EVENT_INDEX_OFFSET 0
diff --git a/arch/x86/include/asm/perf_event.h b/arch/x86/include/asm/perf_event.h
index 096c975e099..9b922c13625 100644
--- a/arch/x86/include/asm/perf_event.h
+++ b/arch/x86/include/asm/perf_event.h
@@ -188,8 +188,6 @@ extern u32 get_ibs_caps(void);
#ifdef CONFIG_PERF_EVENTS
extern void perf_events_lapic_init(void);
-#define PERF_EVENT_INDEX_OFFSET 0
-
/*
* Abuse bit 3 of the cpu eflags register to indicate proper PEBS IP fixups.
* This flag is otherwise unused and ABI specified to be 0, so nobody should
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 08855613ceb..02545e6df95 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -680,6 +680,12 @@ struct pmu {
* for each successful ->add() during the transaction.
*/
void (*cancel_txn) (struct pmu *pmu); /* optional */
+
+ /*
+ * Will return the value for perf_event_mmap_page::index for this event,
+ * if no implementation is provided it will default to: event->hw.idx + 1.
+ */
+ int (*event_idx) (struct perf_event *event); /*optional */
};
/**
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 0ca1f648ac0..3894309c41a 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -3208,10 +3208,6 @@ int perf_event_task_disable(void)
return 0;
}
-#ifndef PERF_EVENT_INDEX_OFFSET
-# define PERF_EVENT_INDEX_OFFSET 0
-#endif
-
static int perf_event_index(struct perf_event *event)
{
if (event->hw.state & PERF_HES_STOPPED)
@@ -3220,7 +3216,7 @@ static int perf_event_index(struct perf_event *event)
if (event->state != PERF_EVENT_STATE_ACTIVE)
return 0;
- return event->hw.idx + 1 - PERF_EVENT_INDEX_OFFSET;
+ return event->pmu->event_idx(event);
}
static void calc_timer_values(struct perf_event *event,
@@ -4992,6 +4988,11 @@ static int perf_swevent_init(struct perf_event *event)
return 0;
}
+static int perf_swevent_event_idx(struct perf_event *event)
+{
+ return 0;
+}
+
static struct pmu perf_swevent = {
.task_ctx_nr = perf_sw_context,
@@ -5001,6 +5002,8 @@ static struct pmu perf_swevent = {
.start = perf_swevent_start,
.stop = perf_swevent_stop,
.read = perf_swevent_read,
+
+ .event_idx = perf_swevent_event_idx,
};
#ifdef CONFIG_EVENT_TRACING
@@ -5087,6 +5090,8 @@ static struct pmu perf_tracepoint = {
.start = perf_swevent_start,
.stop = perf_swevent_stop,
.read = perf_swevent_read,
+
+ .event_idx = perf_swevent_event_idx,
};
static inline void perf_tp_register(void)
@@ -5306,6 +5311,8 @@ static struct pmu perf_cpu_clock = {
.start = cpu_clock_event_start,
.stop = cpu_clock_event_stop,
.read = cpu_clock_event_read,
+
+ .event_idx = perf_swevent_event_idx,
};
/*
@@ -5378,6 +5385,8 @@ static struct pmu perf_task_clock = {
.start = task_clock_event_start,
.stop = task_clock_event_stop,
.read = task_clock_event_read,
+
+ .event_idx = perf_swevent_event_idx,
};
static void perf_pmu_nop_void(struct pmu *pmu)
@@ -5405,6 +5414,11 @@ static void perf_pmu_cancel_txn(struct pmu *pmu)
perf_pmu_enable(pmu);
}
+static int perf_event_idx_default(struct perf_event *event)
+{
+ return event->hw.idx + 1;
+}
+
/*
* Ensures all contexts with the same task_ctx_nr have the same
* pmu_cpu_context too.
@@ -5594,6 +5608,9 @@ got_cpu_context:
pmu->pmu_disable = perf_pmu_nop_void;
}
+ if (!pmu->event_idx)
+ pmu->event_idx = perf_event_idx_default;
+
list_add_rcu(&pmu->entry, &pmus);
ret = 0;
unlock:
diff --git a/kernel/events/hw_breakpoint.c b/kernel/events/hw_breakpoint.c
index b7971d6f38b..b0309f76d77 100644
--- a/kernel/events/hw_breakpoint.c
+++ b/kernel/events/hw_breakpoint.c
@@ -613,6 +613,11 @@ static void hw_breakpoint_stop(struct perf_event *bp, int flags)
bp->hw.state = PERF_HES_STOPPED;
}
+static int hw_breakpoint_event_idx(struct perf_event *bp)
+{
+ return 0;
+}
+
static struct pmu perf_breakpoint = {
.task_ctx_nr = perf_sw_context, /* could eventually get its own */
@@ -622,6 +627,8 @@ static struct pmu perf_breakpoint = {
.start = hw_breakpoint_start,
.stop = hw_breakpoint_stop,
.read = hw_breakpoint_pmu_read,
+
+ .event_idx = hw_breakpoint_event_idx,
};
int __init init_hw_breakpoint(void)
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-04 03:47:20 +0000