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Merge branch 'perf' into devel

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Conflicts:
	arch/arm/Kconfig
This commit is contained in:
Russell King 2010-02-25 22:09:22 +00:00
commit bc85e585c6
14 changed files with 2595 additions and 65 deletions
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15
arch/arm/Kconfig
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@ -20,6 +20,8 @@ config ARM
select HAVE_GENERIC_DMA_COHERENT
select HAVE_KERNEL_GZIP
select HAVE_KERNEL_LZO
select HAVE_PERF_EVENTS
select PERF_USE_VMALLOC
help
The ARM series is a line of low-power-consumption RISC chip designs
licensed by ARM Ltd and targeted at embedded applications and
@ -877,6 +879,11 @@ config XSCALE_PMU
depends on CPU_XSCALE && !XSCALE_PMU_TIMER
default y
config CPU_HAS_PMU
depends on CPU_V6 || CPU_V7 || XSCALE_PMU
default y
bool
if !MMU
source "arch/arm/Kconfig-nommu"
endif
@ -1181,6 +1188,14 @@ config HIGHPTE
depends on HIGHMEM
depends on !OUTER_CACHE
config HW_PERF_EVENTS
bool "Enable hardware performance counter support for perf events"
depends on PERF_EVENTS && CPU_HAS_PMU && (CPU_V6 || CPU_V7)
default y
help
Enable hardware performance counter support for perf events. If
disabled, perf events will use software events only.
source "mm/Kconfig"
config LEDS

31
arch/arm/include/asm/perf_event.h Normal file
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@ -0,0 +1,31 @@
/*
* linux/arch/arm/include/asm/perf_event.h
*
* Copyright (C) 2009 picoChip Designs Ltd, Jamie Iles
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#ifndef __ARM_PERF_EVENT_H__
#define __ARM_PERF_EVENT_H__
/*
* NOP: on *most* (read: all supported) ARM platforms, the performance
* counter interrupts are regular interrupts and not an NMI. This
* means that when we receive the interrupt we can call
* perf_event_do_pending() that handles all of the work with
* interrupts enabled.
*/
static inline void
set_perf_event_pending(void)
{
}
/* ARM performance counters start from 1 (in the cp15 accesses) so use the
* same indexes here for consistency. */
#define PERF_EVENT_INDEX_OFFSET 1
#endif /* __ARM_PERF_EVENT_H__ */

75
arch/arm/include/asm/pmu.h Normal file
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@ -0,0 +1,75 @@
/*
* linux/arch/arm/include/asm/pmu.h
*
* Copyright (C) 2009 picoChip Designs Ltd, Jamie Iles
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#ifndef __ARM_PMU_H__
#define __ARM_PMU_H__
#ifdef CONFIG_CPU_HAS_PMU
struct pmu_irqs {
const int *irqs;
int num_irqs;
};
/**
* reserve_pmu() - reserve the hardware performance counters
*
* Reserve the hardware performance counters in the system for exclusive use.
* The 'struct pmu_irqs' for the system is returned on success, ERR_PTR()
* encoded error on failure.
*/
extern const struct pmu_irqs *
reserve_pmu(void);
/**
* release_pmu() - Relinquish control of the performance counters
*
* Release the performance counters and allow someone else to use them.
* Callers must have disabled the counters and released IRQs before calling
* this. The 'struct pmu_irqs' returned from reserve_pmu() must be passed as
* a cookie.
*/
extern int
release_pmu(const struct pmu_irqs *irqs);
/**
* init_pmu() - Initialise the PMU.
*
* Initialise the system ready for PMU enabling. This should typically set the
* IRQ affinity and nothing else. The users (oprofile/perf events etc) will do
* the actual hardware initialisation.
*/
extern int
init_pmu(void);
#else /* CONFIG_CPU_HAS_PMU */
static inline const struct pmu_irqs *
reserve_pmu(void)
{
return ERR_PTR(-ENODEV);
}
static inline int
release_pmu(const struct pmu_irqs *irqs)
{
return -ENODEV;
}
static inline int
init_pmu(void)
{
return -ENODEV;
}
#endif /* CONFIG_CPU_HAS_PMU */
#endif /* __ARM_PMU_H__ */

2
arch/arm/kernel/Makefile
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@ -46,6 +46,8 @@ obj-$(CONFIG_CPU_XSCALE) += xscale-cp0.o
obj-$(CONFIG_CPU_XSC3) += xscale-cp0.o
obj-$(CONFIG_CPU_MOHAWK) += xscale-cp0.o
obj-$(CONFIG_IWMMXT) += iwmmxt.o
obj-$(CONFIG_CPU_HAS_PMU) += pmu.o
obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o
AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt
ifneq ($(CONFIG_ARCH_EBSA110),y)

2276
arch/arm/kernel/perf_event.c Normal file
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File diff suppressed because it is too large Load Diff

103
arch/arm/kernel/pmu.c Normal file
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@ -0,0 +1,103 @@
/*
* linux/arch/arm/kernel/pmu.c
*
* Copyright (C) 2009 picoChip Designs Ltd, Jamie Iles
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/cpumask.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <asm/pmu.h>
/*
* Define the IRQs for the system. We could use something like a platform
* device but that seems fairly heavyweight for this. Also, the performance
* counters can't be removed or hotplugged.
*
* Ordering is important: init_pmu() will use the ordering to set the affinity
* to the corresponding core. e.g. the first interrupt will go to cpu 0, the
* second goes to cpu 1 etc.
*/
static const int irqs[] = {
#if defined(CONFIG_ARCH_OMAP2)
3,
#elif defined(CONFIG_ARCH_BCMRING)
IRQ_PMUIRQ,
#elif defined(CONFIG_MACH_REALVIEW_EB)
IRQ_EB11MP_PMU_CPU0,
IRQ_EB11MP_PMU_CPU1,
IRQ_EB11MP_PMU_CPU2,
IRQ_EB11MP_PMU_CPU3,
#elif defined(CONFIG_ARCH_OMAP3)
INT_34XX_BENCH_MPU_EMUL,
#elif defined(CONFIG_ARCH_IOP32X)
IRQ_IOP32X_CORE_PMU,
#elif defined(CONFIG_ARCH_IOP33X)
IRQ_IOP33X_CORE_PMU,
#elif defined(CONFIG_ARCH_PXA)
IRQ_PMU,
#endif
};
static const struct pmu_irqs pmu_irqs = {
.irqs = irqs,
.num_irqs = ARRAY_SIZE(irqs),
};
static volatile long pmu_lock;
const struct pmu_irqs *
reserve_pmu(void)
{
return test_and_set_bit_lock(0, &pmu_lock) ? ERR_PTR(-EBUSY) :
&pmu_irqs;
}
EXPORT_SYMBOL_GPL(reserve_pmu);
int
release_pmu(const struct pmu_irqs *irqs)
{
if (WARN_ON(irqs != &pmu_irqs))
return -EINVAL;
clear_bit_unlock(0, &pmu_lock);
return 0;
}
EXPORT_SYMBOL_GPL(release_pmu);
static int
set_irq_affinity(int irq,
unsigned int cpu)
{
#ifdef CONFIG_SMP
int err = irq_set_affinity(irq, cpumask_of(cpu));
if (err)
pr_warning("unable to set irq affinity (irq=%d, cpu=%u)\n",
irq, cpu);
return err;
#else
return 0;
#endif
}
int
init_pmu(void)
{
int i, err = 0;
for (i = 0; i < pmu_irqs.num_irqs; ++i) {
err = set_irq_affinity(pmu_irqs.irqs[i], i);
if (err)
break;
}
return err;
}
EXPORT_SYMBOL_GPL(init_pmu);

7
arch/arm/mm/fault.c
View File

@ -18,6 +18,7 @@
#include <linux/page-flags.h>
#include <linux/sched.h>
#include <linux/highmem.h>
#include <linux/perf_event.h>
#include <asm/system.h>
#include <asm/pgtable.h>
@ -302,6 +303,12 @@ do_page_fault(unsigned long addr, unsigned int fsr, struct pt_regs *regs)
fault = __do_page_fault(mm, addr, fsr, tsk);
up_read(&mm->mmap_sem);
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, 0, regs, addr);
if (fault & VM_FAULT_MAJOR)
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, 0, regs, addr);
else if (fault & VM_FAULT_MINOR)
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, 0, regs, addr);
/*
* Handle the "normal" case first - VM_FAULT_MAJOR / VM_FAULT_MINOR
*/

4
arch/arm/oprofile/op_model_arm11_core.c
View File

@ -132,7 +132,7 @@ static irqreturn_t arm11_pmu_interrupt(int irq, void *arg)
return IRQ_HANDLED;
}
int arm11_request_interrupts(int *irqs, int nr)
int arm11_request_interrupts(const int *irqs, int nr)
{
unsigned int i;
int ret = 0;
@ -153,7 +153,7 @@ int arm11_request_interrupts(int *irqs, int nr)
return ret;
}
void arm11_release_interrupts(int *irqs, int nr)
void arm11_release_interrupts(const int *irqs, int nr)
{
unsigned int i;

4
arch/arm/oprofile/op_model_arm11_core.h
View File

@ -39,7 +39,7 @@
int arm11_setup_pmu(void);
int arm11_start_pmu(void);
int arm11_stop_pmu(void);
int arm11_request_interrupts(int *, int);
void arm11_release_interrupts(int *, int);
int arm11_request_interrupts(const int *, int);
void arm11_release_interrupts(const int *, int);
#endif

42
arch/arm/oprofile/op_model_mpcore.c
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@ -32,6 +32,7 @@
/* #define DEBUG */
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/sched.h>
#include <linux/oprofile.h>
#include <linux/interrupt.h>
@ -43,6 +44,7 @@
#include <mach/hardware.h>
#include <mach/board-eb.h>
#include <asm/system.h>
#include <asm/pmu.h>
#include "op_counter.h"
#include "op_arm_model.h"
@ -58,6 +60,7 @@
* Bitmask of used SCU counters
*/
static unsigned int scu_em_used;
static const struct pmu_irqs *pmu_irqs;
/*
* 2 helper fns take a counter number from 0-7 (not the userspace-visible counter number)
@ -225,33 +228,40 @@ static int em_setup_ctrs(void)
return 0;
}
static int arm11_irqs[] = {
[0] = IRQ_EB11MP_PMU_CPU0,
[1] = IRQ_EB11MP_PMU_CPU1,
[2] = IRQ_EB11MP_PMU_CPU2,
[3] = IRQ_EB11MP_PMU_CPU3
};
static int em_start(void)
{
int ret;
ret = arm11_request_interrupts(arm11_irqs, ARRAY_SIZE(arm11_irqs));
pmu_irqs = reserve_pmu();
if (IS_ERR(pmu_irqs)) {
ret = PTR_ERR(pmu_irqs);
goto out;
}
ret = arm11_request_interrupts(pmu_irqs->irqs, pmu_irqs->num_irqs);
if (ret == 0) {
em_call_function(arm11_start_pmu);
ret = scu_start();
if (ret)
arm11_release_interrupts(arm11_irqs, ARRAY_SIZE(arm11_irqs));
if (ret) {
arm11_release_interrupts(pmu_irqs->irqs,
pmu_irqs->num_irqs);
} else {
release_pmu(pmu_irqs);
pmu_irqs = NULL;
}
}
out:
return ret;
}
static void em_stop(void)
{
em_call_function(arm11_stop_pmu);
arm11_release_interrupts(arm11_irqs, ARRAY_SIZE(arm11_irqs));
arm11_release_interrupts(pmu_irqs->irqs, pmu_irqs->num_irqs);
scu_stop();
release_pmu(pmu_irqs);
}
/*
@ -283,15 +293,7 @@ static int em_setup(void)
em_route_irq(IRQ_EB11MP_PMU_SCU6, 3);
em_route_irq(IRQ_EB11MP_PMU_SCU7, 3);
/*
* Send CP15 PMU interrupts to the owner CPU.
*/
em_route_irq(IRQ_EB11MP_PMU_CPU0, 0);
em_route_irq(IRQ_EB11MP_PMU_CPU1, 1);
em_route_irq(IRQ_EB11MP_PMU_CPU2, 2);
em_route_irq(IRQ_EB11MP_PMU_CPU3, 3);
return 0;
return init_pmu();
}
struct op_arm_model_spec op_mpcore_spec = {

32
arch/arm/oprofile/op_model_v6.c
View File

@ -19,39 +19,47 @@
/* #define DEBUG */
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/sched.h>
#include <linux/oprofile.h>
#include <linux/interrupt.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/pmu.h>
#include "op_counter.h"
#include "op_arm_model.h"
#include "op_model_arm11_core.h"
static int irqs[] = {
#ifdef CONFIG_ARCH_OMAP2
3,
#endif
#ifdef CONFIG_ARCH_BCMRING
IRQ_PMUIRQ, /* for BCMRING, ARM PMU interrupt is 43 */
#endif
};
static const struct pmu_irqs *pmu_irqs;
static void armv6_pmu_stop(void)
{
arm11_stop_pmu();
arm11_release_interrupts(irqs, ARRAY_SIZE(irqs));
arm11_release_interrupts(pmu_irqs->irqs, pmu_irqs->num_irqs);
release_pmu(pmu_irqs);
pmu_irqs = NULL;
}
static int armv6_pmu_start(void)
{
int ret;
ret = arm11_request_interrupts(irqs, ARRAY_SIZE(irqs));
if (ret >= 0)
ret = arm11_start_pmu();
pmu_irqs = reserve_pmu();
if (IS_ERR(pmu_irqs)) {
ret = PTR_ERR(pmu_irqs);
goto out;
}
ret = arm11_request_interrupts(pmu_irqs->irqs, pmu_irqs->num_irqs);
if (ret >= 0) {
ret = arm11_start_pmu();
} else {
release_pmu(pmu_irqs);
pmu_irqs = NULL;
}
out:
return ret;
}

30
arch/arm/oprofile/op_model_v7.c
View File

@ -11,11 +11,14 @@
*/
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/oprofile.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/smp.h>
#include <asm/pmu.h>
#include "op_counter.h"
#include "op_arm_model.h"
#include "op_model_v7.h"
@ -295,7 +298,7 @@ static irqreturn_t armv7_pmnc_interrupt(int irq, void *arg)
return IRQ_HANDLED;
}
int armv7_request_interrupts(int *irqs, int nr)
int armv7_request_interrupts(const int *irqs, int nr)
{
unsigned int i;
int ret = 0;
@ -318,7 +321,7 @@ int armv7_request_interrupts(int *irqs, int nr)
return ret;
}
void armv7_release_interrupts(int *irqs, int nr)
void armv7_release_interrupts(const int *irqs, int nr)
{
unsigned int i;
@ -362,12 +365,7 @@ static void armv7_pmnc_dump_regs(void)
}
#endif
static int irqs[] = {
#ifdef CONFIG_ARCH_OMAP3
INT_34XX_BENCH_MPU_EMUL,
#endif
};
static const struct pmu_irqs *pmu_irqs;
static void armv7_pmnc_stop(void)
{
@ -375,19 +373,29 @@ static void armv7_pmnc_stop(void)
armv7_pmnc_dump_regs();
#endif
armv7_stop_pmnc();
armv7_release_interrupts(irqs, ARRAY_SIZE(irqs));
armv7_release_interrupts(pmu_irqs->irqs, pmu_irqs->num_irqs);
release_pmu(pmu_irqs);
pmu_irqs = NULL;
}
static int armv7_pmnc_start(void)
{
int ret;
pmu_irqs = reserve_pmu();
if (IS_ERR(pmu_irqs))
return PTR_ERR(pmu_irqs);
#ifdef DEBUG
armv7_pmnc_dump_regs();
#endif
ret = armv7_request_interrupts(irqs, ARRAY_SIZE(irqs));
if (ret >= 0)
ret = armv7_request_interrupts(pmu_irqs->irqs, pmu_irqs->num_irqs);
if (ret >= 0) {
armv7_start_pmnc();
} else {
release_pmu(pmu_irqs);
pmu_irqs = NULL;
}
return ret;
}

4
arch/arm/oprofile/op_model_v7.h
View File

@ -97,7 +97,7 @@
int armv7_setup_pmu(void);
int armv7_start_pmu(void);
int armv7_stop_pmu(void);
int armv7_request_interrupts(int *, int);
void armv7_release_interrupts(int *, int);
int armv7_request_interrupts(const int *, int);
void armv7_release_interrupts(const int *, int);
#endif

35
arch/arm/oprofile/op_model_xscale.c
View File

@ -17,12 +17,14 @@
/* #define DEBUG */
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/sched.h>
#include <linux/oprofile.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <asm/cputype.h>
#include <asm/pmu.h>
#include "op_counter.h"
#include "op_arm_model.h"
@ -33,17 +35,6 @@
#define PMU_RESET (CCNT_RESET | PMN_RESET)
#define PMU_CNT64 0x008 /* Make CCNT count every 64th cycle */
/* TODO do runtime detection */
#ifdef CONFIG_ARCH_IOP32X
#define XSCALE_PMU_IRQ IRQ_IOP32X_CORE_PMU
#endif
#ifdef CONFIG_ARCH_IOP33X
#define XSCALE_PMU_IRQ IRQ_IOP33X_CORE_PMU
#endif
#ifdef CONFIG_ARCH_PXA
#define XSCALE_PMU_IRQ IRQ_PMU
#endif
/*
* Different types of events that can be counted by the XScale PMU
* as used by Oprofile userspace. Here primarily for documentation
@ -367,6 +358,8 @@ static irqreturn_t xscale_pmu_interrupt(int irq, void *arg)
return IRQ_HANDLED;
}
static const struct pmu_irqs *pmu_irqs;
static void xscale_pmu_stop(void)
{
u32 pmnc = read_pmnc();
@ -374,20 +367,30 @@ static void xscale_pmu_stop(void)
pmnc &= ~PMU_ENABLE;
write_pmnc(pmnc);
free_irq(XSCALE_PMU_IRQ, results);
free_irq(pmu_irqs->irqs[0], results);
release_pmu(pmu_irqs);
pmu_irqs = NULL;
}
static int xscale_pmu_start(void)
{
int ret;
u32 pmnc = read_pmnc();
u32 pmnc;
ret = request_irq(XSCALE_PMU_IRQ, xscale_pmu_interrupt, IRQF_DISABLED,
"XScale PMU", (void *)results);
pmu_irqs = reserve_pmu();
if (IS_ERR(pmu_irqs))
return PTR_ERR(pmu_irqs);
pmnc = read_pmnc();
ret = request_irq(pmu_irqs->irqs[0], xscale_pmu_interrupt,
IRQF_DISABLED, "XScale PMU", (void *)results);
if (ret < 0) {
printk(KERN_ERR "oprofile: unable to request IRQ%d for XScale PMU\n",
XSCALE_PMU_IRQ);
pmu_irqs->irqs[0]);
release_pmu(pmu_irqs);
pmu_irqs = NULL;
return ret;
}