diff options
Diffstat (limited to 'arch/arm/kernel/perf_event.c')
| -rw-r--r-- | arch/arm/kernel/perf_event.c | 3029 |
1 files changed, 280 insertions, 2749 deletions
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c index 07a50357492..4238bcba9d6 100644 --- a/arch/arm/kernel/perf_event.c +++ b/arch/arm/kernel/perf_event.c @@ -4,9 +4,7 @@ * ARM performance counter support. * * Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles - * - * ARMv7 support: Jean Pihet <jpihet@mvista.com> - * 2010 (c) MontaVista Software, LLC. + * Copyright (C) 2010 ARM Ltd., Will Deacon <will.deacon@arm.com> * * This code is based on the sparc64 perf event code, which is in turn based * on the x86 code. Callchain code is based on the ARM OProfile backtrace @@ -14,134 +12,23 @@ */ #define pr_fmt(fmt) "hw perfevents: " fmt -#include <linux/interrupt.h> #include <linux/kernel.h> -#include <linux/module.h> -#include <linux/perf_event.h> #include <linux/platform_device.h> -#include <linux/spinlock.h> +#include <linux/pm_runtime.h> #include <linux/uaccess.h> +#include <linux/irq.h> +#include <linux/irqdesc.h> -#include <asm/cputype.h> -#include <asm/irq.h> #include <asm/irq_regs.h> #include <asm/pmu.h> #include <asm/stacktrace.h> -static struct platform_device *pmu_device; - -/* - * Hardware lock to serialize accesses to PMU registers. Needed for the - * read/modify/write sequences. - */ -DEFINE_SPINLOCK(pmu_lock); - -/* - * ARMv6 supports a maximum of 3 events, starting from index 1. If we add - * another platform that supports more, we need to increase this to be the - * largest of all platforms. - * - * ARMv7 supports up to 32 events: - * cycle counter CCNT + 31 events counters CNT0..30. - * Cortex-A8 has 1+4 counters, Cortex-A9 has 1+6 counters. - */ -#define ARMPMU_MAX_HWEVENTS 33 - -/* The events for a given CPU. */ -struct cpu_hw_events { - /* - * The events that are active on the CPU for the given index. Index 0 - * is reserved. - */ - struct perf_event *events[ARMPMU_MAX_HWEVENTS]; - - /* - * A 1 bit for an index indicates that the counter is being used for - * an event. A 0 means that the counter can be used. - */ - unsigned long used_mask[BITS_TO_LONGS(ARMPMU_MAX_HWEVENTS)]; - - /* - * A 1 bit for an index indicates that the counter is actively being - * used. - */ - unsigned long active_mask[BITS_TO_LONGS(ARMPMU_MAX_HWEVENTS)]; -}; -DEFINE_PER_CPU(struct cpu_hw_events, cpu_hw_events); - -/* PMU names. */ -static const char *arm_pmu_names[] = { - [ARM_PERF_PMU_ID_XSCALE1] = "xscale1", - [ARM_PERF_PMU_ID_XSCALE2] = "xscale2", - [ARM_PERF_PMU_ID_V6] = "v6", - [ARM_PERF_PMU_ID_V6MP] = "v6mpcore", - [ARM_PERF_PMU_ID_CA8] = "ARMv7 Cortex-A8", - [ARM_PERF_PMU_ID_CA9] = "ARMv7 Cortex-A9", -}; - -struct arm_pmu { - enum arm_perf_pmu_ids id; - irqreturn_t (*handle_irq)(int irq_num, void *dev); - void (*enable)(struct hw_perf_event *evt, int idx); - void (*disable)(struct hw_perf_event *evt, int idx); - int (*event_map)(int evt); - u64 (*raw_event)(u64); - int (*get_event_idx)(struct cpu_hw_events *cpuc, - struct hw_perf_event *hwc); - u32 (*read_counter)(int idx); - void (*write_counter)(int idx, u32 val); - void (*start)(void); - void (*stop)(void); - int num_events; - u64 max_period; -}; - -/* Set at runtime when we know what CPU type we are. */ -static const struct arm_pmu *armpmu; - -enum arm_perf_pmu_ids -armpmu_get_pmu_id(void) -{ - int id = -ENODEV; - - if (armpmu != NULL) - id = armpmu->id; - - return id; -} -EXPORT_SYMBOL_GPL(armpmu_get_pmu_id); - -int -armpmu_get_max_events(void) -{ - int max_events = 0; - - if (armpmu != NULL) - max_events = armpmu->num_events; - - return max_events; -} -EXPORT_SYMBOL_GPL(armpmu_get_max_events); - -int perf_num_counters(void) -{ - return armpmu_get_max_events(); -} -EXPORT_SYMBOL_GPL(perf_num_counters); - -#define HW_OP_UNSUPPORTED 0xFFFF - -#define C(_x) \ - PERF_COUNT_HW_CACHE_##_x - -#define CACHE_OP_UNSUPPORTED 0xFFFF - -static unsigned armpmu_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] - [PERF_COUNT_HW_CACHE_OP_MAX] - [PERF_COUNT_HW_CACHE_RESULT_MAX]; - static int -armpmu_map_cache_event(u64 config) +armpmu_map_cache_event(const unsigned (*cache_map) + [PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX], + u64 config) { unsigned int cache_type, cache_op, cache_result, ret; @@ -157,7 +44,7 @@ armpmu_map_cache_event(u64 config) if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX) return -EINVAL; - ret = (int)armpmu_perf_cache_map[cache_type][cache_op][cache_result]; + ret = (int)(*cache_map)[cache_type][cache_op][cache_result]; if (ret == CACHE_OP_UNSUPPORTED) return -ENOENT; @@ -166,10 +53,50 @@ armpmu_map_cache_event(u64 config) } static int -armpmu_event_set_period(struct perf_event *event, - struct hw_perf_event *hwc, - int idx) +armpmu_map_hw_event(const unsigned (*event_map)[PERF_COUNT_HW_MAX], u64 config) +{ + int mapping; + + if (config >= PERF_COUNT_HW_MAX) + return -EINVAL; + + mapping = (*event_map)[config]; + return mapping == HW_OP_UNSUPPORTED ? -ENOENT : mapping; +} + +static int +armpmu_map_raw_event(u32 raw_event_mask, u64 config) { + return (int)(config & raw_event_mask); +} + +int +armpmu_map_event(struct perf_event *event, + const unsigned (*event_map)[PERF_COUNT_HW_MAX], + const unsigned (*cache_map) + [PERF_COUNT_HW_CACHE_MAX] + [PERF_COUNT_HW_CACHE_OP_MAX] + [PERF_COUNT_HW_CACHE_RESULT_MAX], + u32 raw_event_mask) +{ + u64 config = event->attr.config; + + switch (event->attr.type) { + case PERF_TYPE_HARDWARE: + return armpmu_map_hw_event(event_map, config); + case PERF_TYPE_HW_CACHE: + return armpmu_map_cache_event(cache_map, config); + case PERF_TYPE_RAW: + return armpmu_map_raw_event(raw_event_mask, config); + } + + return -ENOENT; +} + +int armpmu_event_set_period(struct perf_event *event) +{ + struct arm_pmu *armpmu = to_arm_pmu(event->pmu); + struct hw_perf_event *hwc = &event->hw; s64 left = local64_read(&hwc->period_left); s64 period = hwc->sample_period; int ret = 0; @@ -193,32 +120,28 @@ armpmu_event_set_period(struct perf_event *event, local64_set(&hwc->prev_count, (u64)-left); - armpmu->write_counter(idx, (u64)(-left) & 0xffffffff); + armpmu->write_counter(event, (u64)(-left) & 0xffffffff); perf_event_update_userpage(event); return ret; } -static u64 -armpmu_event_update(struct perf_event *event, - struct hw_perf_event *hwc, - int idx) +u64 armpmu_event_update(struct perf_event *event) { - int shift = 64 - 32; - s64 prev_raw_count, new_raw_count; - u64 delta; + struct arm_pmu *armpmu = to_arm_pmu(event->pmu); + struct hw_perf_event *hwc = &event->hw; + u64 delta, prev_raw_count, new_raw_count; again: prev_raw_count = local64_read(&hwc->prev_count); - new_raw_count = armpmu->read_counter(idx); + new_raw_count = armpmu->read_counter(event); if (local64_cmpxchg(&hwc->prev_count, prev_raw_count, new_raw_count) != prev_raw_count) goto again; - delta = (new_raw_count << shift) - (prev_raw_count << shift); - delta >>= shift; + delta = (new_raw_count - prev_raw_count) & armpmu->max_period; local64_add(delta, &event->count); local64_sub(delta, &hwc->period_left); @@ -229,43 +152,31 @@ again: static void armpmu_read(struct perf_event *event) { - struct hw_perf_event *hwc = &event->hw; - - /* Don't read disabled counters! */ - if (hwc->idx < 0) - return; - - armpmu_event_update(event, hwc, hwc->idx); + armpmu_event_update(event); } static void armpmu_stop(struct perf_event *event, int flags) { + struct arm_pmu *armpmu = to_arm_pmu(event->pmu); struct hw_perf_event *hwc = &event->hw; - if (!armpmu) - return; - /* * ARM pmu always has to update the counter, so ignore * PERF_EF_UPDATE, see comments in armpmu_start(). */ if (!(hwc->state & PERF_HES_STOPPED)) { - armpmu->disable(hwc, hwc->idx); - barrier(); /* why? */ - armpmu_event_update(event, hwc, hwc->idx); + armpmu->disable(event); + armpmu_event_update(event); hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE; } } -static void -armpmu_start(struct perf_event *event, int flags) +static void armpmu_start(struct perf_event *event, int flags) { + struct arm_pmu *armpmu = to_arm_pmu(event->pmu); struct hw_perf_event *hwc = &event->hw; - if (!armpmu) - return; - /* * ARM pmu always has to reprogram the period, so ignore * PERF_EF_RELOAD, see the comment below. @@ -281,23 +192,23 @@ armpmu_start(struct perf_event *event, int flags) * get an interrupt too soon or *way* too late if the overflow has * happened since disabling. */ - armpmu_event_set_period(event, hwc, hwc->idx); - armpmu->enable(hwc, hwc->idx); + armpmu_event_set_period(event); + armpmu->enable(event); } static void armpmu_del(struct perf_event *event, int flags) { - struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events); + struct arm_pmu *armpmu = to_arm_pmu(event->pmu); + struct pmu_hw_events *hw_events = armpmu->get_hw_events(); struct hw_perf_event *hwc = &event->hw; int idx = hwc->idx; - WARN_ON(idx < 0); - - clear_bit(idx, cpuc->active_mask); armpmu_stop(event, PERF_EF_UPDATE); - cpuc->events[idx] = NULL; - clear_bit(idx, cpuc->used_mask); + hw_events->events[idx] = NULL; + clear_bit(idx, hw_events->used_mask); + if (armpmu->clear_event_idx) + armpmu->clear_event_idx(hw_events, event); perf_event_update_userpage(event); } @@ -305,7 +216,8 @@ armpmu_del(struct perf_event *event, int flags) static int armpmu_add(struct perf_event *event, int flags) { - struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events); + struct arm_pmu *armpmu = to_arm_pmu(event->pmu); + struct pmu_hw_events *hw_events = armpmu->get_hw_events(); struct hw_perf_event *hwc = &event->hw; int idx; int err = 0; @@ -313,7 +225,7 @@ armpmu_add(struct perf_event *event, int flags) perf_pmu_disable(event->pmu); /* If we don't have a space for the counter then finish early. */ - idx = armpmu->get_event_idx(cpuc, hwc); + idx = armpmu->get_event_idx(hw_events, event); if (idx < 0) { err = idx; goto out; @@ -324,9 +236,8 @@ armpmu_add(struct perf_event *event, int flags) * sure it is disabled. */ event->hw.idx = idx; - armpmu->disable(hwc, idx); - cpuc->events[idx] = event; - set_bit(idx, cpuc->active_mask); + armpmu->disable(event); + hw_events->events[idx] = event; hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE; if (flags & PERF_EF_START) @@ -340,133 +251,131 @@ out: return err; } -static struct pmu pmu; - static int -validate_event(struct cpu_hw_events *cpuc, +validate_event(struct pmu_hw_events *hw_events, struct perf_event *event) { - struct hw_perf_event fake_event = event->hw; + struct arm_pmu *armpmu = to_arm_pmu(event->pmu); + + if (is_software_event(event)) + return 1; + + if (event->state < PERF_EVENT_STATE_OFF) + return 1; - if (event->pmu != &pmu || event->state <= PERF_EVENT_STATE_OFF) + if (event->state == PERF_EVENT_STATE_OFF && !event->attr.enable_on_exec) return 1; - return armpmu->get_event_idx(cpuc, &fake_event) >= 0; + return armpmu->get_event_idx(hw_events, event) >= 0; } static int validate_group(struct perf_event *event) { struct perf_event *sibling, *leader = event->group_leader; - struct cpu_hw_events fake_pmu; + struct pmu_hw_events fake_pmu; + DECLARE_BITMAP(fake_used_mask, ARMPMU_MAX_HWEVENTS); - memset(&fake_pmu, 0, sizeof(fake_pmu)); + /* + * Initialise the fake PMU. We only need to populate the + * used_mask for the purposes of validation. + */ + memset(fake_used_mask, 0, sizeof(fake_used_mask)); + fake_pmu.used_mask = fake_used_mask; if (!validate_event(&fake_pmu, leader)) - return -ENOSPC; + return -EINVAL; list_for_each_entry(sibling, &leader->sibling_list, group_entry) { if (!validate_event(&fake_pmu, sibling)) - return -ENOSPC; + return -EINVAL; } if (!validate_event(&fake_pmu, event)) - return -ENOSPC; + return -EINVAL; return 0; } -static int -armpmu_reserve_hardware(void) +static irqreturn_t armpmu_dispatch_irq(int irq, void *dev) { - int i, err = -ENODEV, irq; + struct arm_pmu *armpmu; + struct platform_device *plat_device; + struct arm_pmu_platdata *plat; + int ret; + u64 start_clock, finish_clock; - pmu_device = reserve_pmu(ARM_PMU_DEVICE_CPU); - if (IS_ERR(pmu_device)) { - pr_warning("unable to reserve pmu\n"); - return PTR_ERR(pmu_device); - } + if (irq_is_percpu(irq)) + dev = *(void **)dev; + armpmu = dev; + plat_device = armpmu->plat_device; + plat = dev_get_platdata(&plat_device->dev); - init_pmu(ARM_PMU_DEVICE_CPU); + start_clock = sched_clock(); + if (plat && plat->handle_irq) + ret = plat->handle_irq(irq, dev, armpmu->handle_irq); + else + ret = armpmu->handle_irq(irq, dev); + finish_clock = sched_clock(); - if (pmu_device->num_resources < 1) { - pr_err("no irqs for PMUs defined\n"); - return -ENODEV; - } + perf_sample_event_took(finish_clock - start_clock); + return ret; +} - for (i = 0; i < pmu_device->num_resources; ++i) { - irq = platform_get_irq(pmu_device, i); - if (irq < 0) - continue; - - err = request_irq(irq, armpmu->handle_irq, - IRQF_DISABLED | IRQF_NOBALANCING, - "armpmu", NULL); - if (err) { - pr_warning("unable to request IRQ%d for ARM perf " - "counters\n", irq); - break; - } - } +static void +armpmu_release_hardware(struct arm_pmu *armpmu) +{ + armpmu->free_irq(armpmu); + pm_runtime_put_sync(&armpmu->plat_device->dev); +} +static int +armpmu_reserve_hardware(struct arm_pmu *armpmu) +{ + int err; + struct platform_device *pmu_device = armpmu->plat_device; + + if (!pmu_device) + return -ENODEV; + + pm_runtime_get_sync(&pmu_device->dev); + err = armpmu->request_irq(armpmu, armpmu_dispatch_irq); if (err) { - for (i = i - 1; i >= 0; --i) { - irq = platform_get_irq(pmu_device, i); - if (irq >= 0) - free_irq(irq, NULL); - } - release_pmu(pmu_device); - pmu_device = NULL; + armpmu_release_hardware(armpmu); + return err; } - return err; + return 0; } static void -armpmu_release_hardware(void) +hw_perf_event_destroy(struct perf_event *event) { - int i, irq; + struct arm_pmu *armpmu = to_arm_pmu(event->pmu); + atomic_t *active_events = &armpmu->active_events; + struct mutex *pmu_reserve_mutex = &armpmu->reserve_mutex; - for (i = pmu_device->num_resources - 1; i >= 0; --i) { - irq = platform_get_irq(pmu_device, i); - if (irq >= 0) - free_irq(irq, NULL); + if (atomic_dec_and_mutex_lock(active_events, pmu_reserve_mutex)) { + armpmu_release_hardware(armpmu); + mutex_unlock(pmu_reserve_mutex); } - armpmu->stop(); - - release_pmu(pmu_device); - pmu_device = NULL; } -static atomic_t active_events = ATOMIC_INIT(0); -static DEFINE_MUTEX(pmu_reserve_mutex); - -static void -hw_perf_event_destroy(struct perf_event *event) +static int +event_requires_mode_exclusion(struct perf_event_attr *attr) { - if (atomic_dec_and_mutex_lock(&active_events, &pmu_reserve_mutex)) { - armpmu_release_hardware(); - mutex_unlock(&pmu_reserve_mutex); - } + return attr->exclude_idle || attr->exclude_user || + attr->exclude_kernel || attr->exclude_hv; } static int __hw_perf_event_init(struct perf_event *event) { + struct arm_pmu *armpmu = to_arm_pmu(event->pmu); struct hw_perf_event *hwc = &event->hw; - int mapping, err; - - /* Decode the generic type into an ARM event identifier. */ - if (PERF_TYPE_HARDWARE == event->attr.type) { - mapping = armpmu->event_map(event->attr.config); - } else if (PERF_TYPE_HW_CACHE == event->attr.type) { - mapping = armpmu_map_cache_event(event->attr.config); - } else if (PERF_TYPE_RAW == event->attr.type) { - mapping = armpmu->raw_event(event->attr.config); - } else { - pr_debug("event type %x not supported\n", event->attr.type); - return -EOPNOTSUPP; - } + int mapping; + + mapping = armpmu->map_event(event); if (mapping < 0) { pr_debug("event %x:%llx not supported\n", event->attr.type, @@ -475,84 +384,75 @@ __hw_perf_event_init(struct perf_event *event) } /* - * Check whether we need to exclude the counter from certain modes. - * The ARM performance counters are on all of the time so if someone - * has asked us for some excludes then we have to fail. - */ - if (event->attr.exclude_kernel || event->attr.exclude_user || - event->attr.exclude_hv || event->attr.exclude_idle) { - pr_debug("ARM performance counters do not support " - "mode exclusion\n"); - return -EPERM; - } - - /* * We don't assign an index until we actually place the event onto * hardware. Use -1 to signify that we haven't decided where to put it * yet. For SMP systems, each core has it's own PMU so we can't do any * clever allocation or constraints checking at this point. */ - hwc->idx = -1; + hwc->idx = -1; + hwc->config_base = 0; + hwc->config = 0; + hwc->event_base = 0; + + /* + * Check whether we need to exclude the counter from certain modes. + */ + if ((!armpmu->set_event_filter || + armpmu->set_event_filter(hwc, &event->attr)) && + event_requires_mode_exclusion(&event->attr)) { + pr_debug("ARM performance counters do not support " + "mode exclusion\n"); + return -EOPNOTSUPP; + } /* - * Store the event encoding into the config_base field. config and - * event_base are unused as the only 2 things we need to know are - * the event mapping and the counter to use. The counter to use is - * also the indx and the config_base is the event type. + * Store the event encoding into the config_base field. */ - hwc->config_base = (unsigned long)mapping; - hwc->config = 0; - hwc->event_base = 0; + hwc->config_base |= (unsigned long)mapping; - if (!hwc->sample_period) { - hwc->sample_period = armpmu->max_period; + if (!is_sampling_event(event)) { + /* + * For non-sampling runs, limit the sample_period to half + * of the counter width. That way, the new counter value + * is far less likely to overtake the previous one unless + * you have some serious IRQ latency issues. + */ + hwc->sample_period = armpmu->max_period >> 1; hwc->last_period = hwc->sample_period; local64_set(&hwc->period_left, hwc->sample_period); } - err = 0; if (event->group_leader != event) { - err = validate_group(event); - if (err) + if (validate_group(event) != 0) return -EINVAL; } - return err; + return 0; } static int armpmu_event_init(struct perf_event *event) { + struct arm_pmu *armpmu = to_arm_pmu(event->pmu); int err = 0; + atomic_t *active_events = &armpmu->active_events; - switch (event->attr.type) { - case PERF_TYPE_RAW: - case PERF_TYPE_HARDWARE: - case PERF_TYPE_HW_CACHE: - break; + /* does not support taken branch sampling */ + if (has_branch_stack(event)) + return -EOPNOTSUPP; - default: + if (armpmu->map_event(event) == -ENOENT) return -ENOENT; - } - - if (!armpmu) - return -ENODEV; event->destroy = hw_perf_event_destroy; - if (!atomic_inc_not_zero(&active_events)) { - if (atomic_read(&active_events) > armpmu->num_events) { - atomic_dec(&active_events); - return -ENOSPC; - } - - mutex_lock(&pmu_reserve_mutex); - if (atomic_read(&active_events) == 0) { - err = armpmu_reserve_hardware(); - } + if (!atomic_inc_not_zero(active_events)) { + mutex_lock(&armpmu->reserve_mutex); + if (atomic_read(active_events) == 0) + err = armpmu_reserve_hardware(armpmu); if (!err) - atomic_inc(&active_events); - mutex_unlock(&pmu_reserve_mutex); + atomic_inc(active_events); + mutex_unlock(&armpmu->reserve_mutex); } if (err) @@ -567,2479 +467,72 @@ static int armpmu_event_init(struct perf_event *event) static void armpmu_enable(struct pmu *pmu) { - /* Enable all of the perf events on hardware. */ - int idx; - struct cpu_hw_events *cpuc = &__get_cpu_var(cpu_hw_events); + struct arm_pmu *armpmu = to_arm_pmu(pmu); + struct pmu_hw_events *hw_events = armpmu->get_hw_events(); + int enabled = bitmap_weight(hw_events->used_mask, armpmu->num_events); - if (!armpmu) - return; - - for (idx = 0; idx <= armpmu->num_events; ++idx) { - struct perf_event *event = cpuc->events[idx]; - - if (!event) - continue; - - armpmu->enable(&event->hw, idx); - } - - armpmu->start(); + if (enabled) + armpmu->start(armpmu); } static void armpmu_disable(struct pmu *pmu) { - if (armpmu) - armpmu->stop(); -} - -static struct pmu pmu = { - .pmu_enable = armpmu_enable, - .pmu_disable = armpmu_disable, - .event_init = armpmu_event_init, - .add = armpmu_add, - .del = armpmu_del, - .start = armpmu_start, - .stop = armpmu_stop, - .read = armpmu_read, -}; - -/* - * ARMv6 Performance counter handling code. - * - * ARMv6 has 2 configurable performance counters and a single cycle counter. - * They all share a single reset bit but can be written to zero so we can use - * that for a reset. - * - * The counters can't be individually enabled or disabled so when we remove - * one event and replace it with another we could get spurious counts from the - * wrong event. However, we can take advantage of the fact that the - * performance counters can export events to the event bus, and the event bus - * itself can be monitored. This requires that we *don't* export the events to - * the event bus. The procedure for disabling a configurable counter is: - * - change the counter to count the ETMEXTOUT[0] signal (0x20). This - * effectively stops the counter from counting. - * - disable the counter's interrupt generation (each counter has it's - * own interrupt enable bit). - * Once stopped, the counter value can be written as 0 to reset. - * - * To enable a counter: - * - enable the counter's interrupt generation. - * - set the new event type. - * - * Note: the dedicated cycle counter only counts cycles and can't be - * enabled/disabled independently of the others. When we want to disable the - * cycle counter, we have to just disable the interrupt reporting and start - * ignoring that counter. When re-enabling, we have to reset the value and - * enable the interrupt. - */ - -enum armv6_perf_types { - ARMV6_PERFCTR_ICACHE_MISS = 0x0, - ARMV6_PERFCTR_IBUF_STALL = 0x1, - ARMV6_PERFCTR_DDEP_STALL = 0x2, - ARMV6_PERFCTR_ITLB_MISS = 0x3, - ARMV6_PERFCTR_DTLB_MISS = 0x4, - ARMV6_PERFCTR_BR_EXEC = 0x5, - ARMV6_PERFCTR_BR_MISPREDICT = 0x6, - ARMV6_PERFCTR_INSTR_EXEC = 0x7, - ARMV6_PERFCTR_DCACHE_HIT = 0x9, - ARMV6_PERFCTR_DCACHE_ACCESS = 0xA, - ARMV6_PERFCTR_DCACHE_MISS = 0xB, - ARMV6_PERFCTR_DCACHE_WBACK = 0xC, - ARMV6_PERFCTR_SW_PC_CHANGE = 0xD, - ARMV6_PERFCTR_MAIN_TLB_MISS = 0xF, - ARMV6_PERFCTR_EXPL_D_ACCESS = 0x10, - ARMV6_PERFCTR_LSU_FULL_STALL = 0x11, - ARMV6_PERFCTR_WBUF_DRAINED = 0x12, - ARMV6_PERFCTR_CPU_CYCLES = 0xFF, - ARMV6_PERFCTR_NOP = 0x20, -}; - -enum armv6_counters { - ARMV6_CYCLE_COUNTER = 1, - ARMV6_COUNTER0, - ARMV6_COUNTER1, -}; - -/* - * The hardware events that we support. We do support cache operations but - * we have harvard caches and no way to combine instruction and data - * accesses/misses in hardware. - */ -static const unsigned armv6_perf_map[PERF_COUNT_HW_MAX] = { - [PERF_COUNT_HW_CPU_CYCLES] = ARMV6_PERFCTR_CPU_CYCLES, - [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6_PERFCTR_INSTR_EXEC, - [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6_PERFCTR_BR_EXEC, - [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6_PERFCTR_BR_MISPREDICT, - [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, -}; - -static const unsigned armv6_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] - [PERF_COUNT_HW_CACHE_OP_MAX] - [PERF_COUNT_HW_CACHE_RESULT_MAX] = { - [C(L1D)] = { - /* - * The performance counters don't differentiate between read - * and write accesses/misses so this isn't strictly correct, - * but it's the best we can do. Writes and reads get - * combined. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV6_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = ARMV6_PERFCTR_DCACHE_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(L1I)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6_PERFCTR_ICACHE_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(LL)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(DTLB)] = { - /* - * The ARM performance counters can count micro DTLB misses, - * micro ITLB misses and main TLB misses. There isn't an event - * for TLB misses, so use the micro misses here and if users - * want the main TLB misses they can use a raw counter. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6_PERFCTR_DTLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(ITLB)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6_PERFCTR_ITLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(BPU)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, -}; - -enum armv6mpcore_perf_types { - ARMV6MPCORE_PERFCTR_ICACHE_MISS = 0x0, - ARMV6MPCORE_PERFCTR_IBUF_STALL = 0x1, - ARMV6MPCORE_PERFCTR_DDEP_STALL = 0x2, - ARMV6MPCORE_PERFCTR_ITLB_MISS = 0x3, - ARMV6MPCORE_PERFCTR_DTLB_MISS = 0x4, - ARMV6MPCORE_PERFCTR_BR_EXEC = 0x5, - ARMV6MPCORE_PERFCTR_BR_NOTPREDICT = 0x6, - ARMV6MPCORE_PERFCTR_BR_MISPREDICT = 0x7, - ARMV6MPCORE_PERFCTR_INSTR_EXEC = 0x8, - ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS = 0xA, - ARMV6MPCORE_PERFCTR_DCACHE_RDMISS = 0xB, - ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS = 0xC, - ARMV6MPCORE_PERFCTR_DCACHE_WRMISS = 0xD, - ARMV6MPCORE_PERFCTR_DCACHE_EVICTION = 0xE, - ARMV6MPCORE_PERFCTR_SW_PC_CHANGE = 0xF, - ARMV6MPCORE_PERFCTR_MAIN_TLB_MISS = 0x10, - ARMV6MPCORE_PERFCTR_EXPL_MEM_ACCESS = 0x11, - ARMV6MPCORE_PERFCTR_LSU_FULL_STALL = 0x12, - ARMV6MPCORE_PERFCTR_WBUF_DRAINED = 0x13, - ARMV6MPCORE_PERFCTR_CPU_CYCLES = 0xFF, -}; - -/* - * The hardware events that we support. We do support cache operations but - * we have harvard caches and no way to combine instruction and data - * accesses/misses in hardware. - */ -static const unsigned armv6mpcore_perf_map[PERF_COUNT_HW_MAX] = { - [PERF_COUNT_HW_CPU_CYCLES] = ARMV6MPCORE_PERFCTR_CPU_CYCLES, - [PERF_COUNT_HW_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_INSTR_EXEC, - [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV6MPCORE_PERFCTR_BR_EXEC, - [PERF_COUNT_HW_BRANCH_MISSES] = ARMV6MPCORE_PERFCTR_BR_MISPREDICT, - [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, -}; - -static const unsigned armv6mpcore_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] - [PERF_COUNT_HW_CACHE_OP_MAX] - [PERF_COUNT_HW_CACHE_RESULT_MAX] = { - [C(L1D)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = - ARMV6MPCORE_PERFCTR_DCACHE_RDACCESS, - [C(RESULT_MISS)] = - ARMV6MPCORE_PERFCTR_DCACHE_RDMISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = - ARMV6MPCORE_PERFCTR_DCACHE_WRACCESS, - [C(RESULT_MISS)] = - ARMV6MPCORE_PERFCTR_DCACHE_WRMISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(L1I)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ICACHE_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(LL)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(DTLB)] = { - /* - * The ARM performance counters can count micro DTLB misses, - * micro ITLB misses and main TLB misses. There isn't an event - * for TLB misses, so use the micro misses here and if users - * want the main TLB misses they can use a raw counter. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_DTLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(ITLB)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV6MPCORE_PERFCTR_ITLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(BPU)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, -}; - -static inline unsigned long -armv6_pmcr_read(void) -{ - u32 val; - asm volatile("mrc p15, 0, %0, c15, c12, 0" : "=r"(val)); - return val; -} - -static inline void -armv6_pmcr_write(unsigned long val) -{ - asm volatile("mcr p15, 0, %0, c15, c12, 0" : : "r"(val)); -} - -#define ARMV6_PMCR_ENABLE (1 << 0) -#define ARMV6_PMCR_CTR01_RESET (1 << 1) -#define ARMV6_PMCR_CCOUNT_RESET (1 << 2) -#define ARMV6_PMCR_CCOUNT_DIV (1 << 3) -#define ARMV6_PMCR_COUNT0_IEN (1 << 4) -#define ARMV6_PMCR_COUNT1_IEN (1 << 5) -#define ARMV6_PMCR_CCOUNT_IEN (1 << 6) -#define ARMV6_PMCR_COUNT0_OVERFLOW (1 << 8) -#define ARMV6_PMCR_COUNT1_OVERFLOW (1 << 9) -#define ARMV6_PMCR_CCOUNT_OVERFLOW (1 << 10) -#define ARMV6_PMCR_EVT_COUNT0_SHIFT 20 -#define ARMV6_PMCR_EVT_COUNT0_MASK (0xFF << ARMV6_PMCR_EVT_COUNT0_SHIFT) -#define ARMV6_PMCR_EVT_COUNT1_SHIFT 12 -#define ARMV6_PMCR_EVT_COUNT1_MASK (0xFF << ARMV6_PMCR_EVT_COUNT1_SHIFT) - -#define ARMV6_PMCR_OVERFLOWED_MASK \ - (ARMV6_PMCR_COUNT0_OVERFLOW | ARMV6_PMCR_COUNT1_OVERFLOW | \ - ARMV6_PMCR_CCOUNT_OVERFLOW) - -static inline int -armv6_pmcr_has_overflowed(unsigned long pmcr) -{ - return (pmcr & ARMV6_PMCR_OVERFLOWED_MASK); -} - -static inline int -armv6_pmcr_counter_has_overflowed(unsigned long pmcr, - enum armv6_counters counter) -{ - int ret = 0; - - if (ARMV6_CYCLE_COUNTER == counter) - ret = pmcr & ARMV6_PMCR_CCOUNT_OVERFLOW; - else if (ARMV6_COUNTER0 == counter) - ret = pmcr & ARMV6_PMCR_COUNT0_OVERFLOW; - else if (ARMV6_COUNTER1 == counter) - ret = pmcr & ARMV6_PMCR_COUNT1_OVERFLOW; - else - WARN_ONCE(1, "invalid counter number (%d)\n", counter); - - return ret; -} - -static inline u32 -armv6pmu_read_counter(int counter) -{ - unsigned long value = 0; - - if (ARMV6_CYCLE_COUNTER == counter) - asm volatile("mrc p15, 0, %0, c15, c12, 1" : "=r"(value)); - else if (ARMV6_COUNTER0 == counter) - asm volatile("mrc p15, 0, %0, c15, c12, 2" : "=r"(value)); - else if (ARMV6_COUNTER1 == counter) - asm volatile("mrc p15, 0, %0, c15, c12, 3" : "=r"(value)); - else - WARN_ONCE(1, "invalid counter number (%d)\n", counter); - - return value; -} - -static inline void -armv6pmu_write_counter(int counter, - u32 value) -{ - if (ARMV6_CYCLE_COUNTER == counter) - asm volatile("mcr p15, 0, %0, c15, c12, 1" : : "r"(value)); - else if (ARMV6_COUNTER0 == counter) - asm volatile("mcr p15, 0, %0, c15, c12, 2" : : "r"(value)); - else if (ARMV6_COUNTER1 == counter) - asm volatile("mcr p15, 0, %0, c15, c12, 3" : : "r"(value)); - else - WARN_ONCE(1, "invalid counter number (%d)\n", counter); -} - -void -armv6pmu_enable_event(struct hw_perf_event *hwc, - int idx) -{ - unsigned long val, mask, evt, flags; - - if (ARMV6_CYCLE_COUNTER == idx) { - mask = 0; - evt = ARMV6_PMCR_CCOUNT_IEN; - } else if (ARMV6_COUNTER0 == idx) { - mask = ARMV6_PMCR_EVT_COUNT0_MASK; - evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT0_SHIFT) | - ARMV6_PMCR_COUNT0_IEN; - } else if (ARMV6_COUNTER1 == idx) { - mask = ARMV6_PMCR_EVT_COUNT1_MASK; - evt = (hwc->config_base << ARMV6_PMCR_EVT_COUNT1_SHIFT) | - ARMV6_PMCR_COUNT1_IEN; - } else { - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - /* - * Mask out the current event and set the counter to count the event - * that we're interested in. - */ - spin_lock_irqsave(&pmu_lock, flags); - val = armv6_pmcr_read(); - val &= ~mask; - val |= evt; - armv6_pmcr_write(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static irqreturn_t -armv6pmu_handle_irq(int irq_num, - void *dev) -{ - unsigned long pmcr = armv6_pmcr_read(); - struct perf_sample_data data; - struct cpu_hw_events *cpuc; - struct pt_regs *regs; - int idx; - - if (!armv6_pmcr_has_overflowed(pmcr)) - return IRQ_NONE; - - regs = get_irq_regs(); - - /* - * The interrupts are cleared by writing the overflow flags back to - * the control register. All of the other bits don't have any effect - * if they are rewritten, so write the whole value back. - */ - armv6_pmcr_write(pmcr); - - perf_sample_data_init(&data, 0); - - cpuc = &__get_cpu_var(cpu_hw_events); - for (idx = 0; idx <= armpmu->num_events; ++idx) { - struct perf_event *event = cpuc->events[idx]; - struct hw_perf_event *hwc; - - if (!test_bit(idx, cpuc->active_mask)) - continue; - - /* - * We have a single interrupt for all counters. Check that - * each counter has overflowed before we process it. - */ - if (!armv6_pmcr_counter_has_overflowed(pmcr, idx)) - continue; - - hwc = &event->hw; - armpmu_event_update(event, hwc, idx); - data.period = event->hw.last_period; - if (!armpmu_event_set_period(event, hwc, idx)) - continue; - - if (perf_event_overflow(event, 0, &data, regs)) - armpmu->disable(hwc, idx); - } - - /* - * Handle the pending perf events. - * - * Note: this call *must* be run with interrupts disabled. For - * platforms that can have the PMU interrupts raised as an NMI, this - * will not work. - */ - irq_work_run(); - - return IRQ_HANDLED; -} - -static void -armv6pmu_start(void) -{ - unsigned long flags, val; - - spin_lock_irqsave(&pmu_lock, flags); - val = armv6_pmcr_read(); - val |= ARMV6_PMCR_ENABLE; - armv6_pmcr_write(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -void -armv6pmu_stop(void) -{ - unsigned long flags, val; - - spin_lock_irqsave(&pmu_lock, flags); - val = armv6_pmcr_read(); - val &= ~ARMV6_PMCR_ENABLE; - armv6_pmcr_write(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static inline int -armv6pmu_event_map(int config) -{ - int mapping = armv6_perf_map[config]; - if (HW_OP_UNSUPPORTED == mapping) - mapping = -EOPNOTSUPP; - return mapping; -} - -static inline int -armv6mpcore_pmu_event_map(int config) -{ - int mapping = armv6mpcore_perf_map[config]; - if (HW_OP_UNSUPPORTED == mapping) - mapping = -EOPNOTSUPP; - return mapping; -} - -static u64 -armv6pmu_raw_event(u64 config) -{ - return config & 0xff; -} - -static int -armv6pmu_get_event_idx(struct cpu_hw_events *cpuc, - struct hw_perf_event *event) -{ - /* Always place a cycle counter into the cycle counter. */ - if (ARMV6_PERFCTR_CPU_CYCLES == event->config_base) { - if (test_and_set_bit(ARMV6_CYCLE_COUNTER, cpuc->used_mask)) - return -EAGAIN; - - return ARMV6_CYCLE_COUNTER; - } else { - /* - * For anything other than a cycle counter, try and use - * counter0 and counter1. - */ - if (!test_and_set_bit(ARMV6_COUNTER1, cpuc->used_mask)) { - return ARMV6_COUNTER1; - } - - if (!test_and_set_bit(ARMV6_COUNTER0, cpuc->used_mask)) { - return ARMV6_COUNTER0; - } - - /* The counters are all in use. */ - return -EAGAIN; - } -} - -static void -armv6pmu_disable_event(struct hw_perf_event *hwc, - int idx) -{ - unsigned long val, mask, evt, flags; - - if (ARMV6_CYCLE_COUNTER == idx) { - mask = ARMV6_PMCR_CCOUNT_IEN; - evt = 0; - } else if (ARMV6_COUNTER0 == idx) { - mask = ARMV6_PMCR_COUNT0_IEN | ARMV6_PMCR_EVT_COUNT0_MASK; - evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT0_SHIFT; - } else if (ARMV6_COUNTER1 == idx) { - mask = ARMV6_PMCR_COUNT1_IEN | ARMV6_PMCR_EVT_COUNT1_MASK; - evt = ARMV6_PERFCTR_NOP << ARMV6_PMCR_EVT_COUNT1_SHIFT; - } else { - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - /* - * Mask out the current event and set the counter to count the number - * of ETM bus signal assertion cycles. The external reporting should - * be disabled and so this should never increment. - */ - spin_lock_irqsave(&pmu_lock, flags); - val = armv6_pmcr_read(); - val &= ~mask; - val |= evt; - armv6_pmcr_write(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void -armv6mpcore_pmu_disable_event(struct hw_perf_event *hwc, - int idx) -{ - unsigned long val, mask, flags, evt = 0; - - if (ARMV6_CYCLE_COUNTER == idx) { - mask = ARMV6_PMCR_CCOUNT_IEN; - } else if (ARMV6_COUNTER0 == idx) { - mask = ARMV6_PMCR_COUNT0_IEN; - } else if (ARMV6_COUNTER1 == idx) { - mask = ARMV6_PMCR_COUNT1_IEN; - } else { - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - /* - * Unlike UP ARMv6, we don't have a way of stopping the counters. We - * simply disable the interrupt reporting. - */ - spin_lock_irqsave(&pmu_lock, flags); - val = armv6_pmcr_read(); - val &= ~mask; - val |= evt; - armv6_pmcr_write(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static const struct arm_pmu armv6pmu = { - .id = ARM_PERF_PMU_ID_V6, - .handle_irq = armv6pmu_handle_irq, - .enable = armv6pmu_enable_event, - .disable = armv6pmu_disable_event, - .event_map = armv6pmu_event_map, - .raw_event = armv6pmu_raw_event, - .read_counter = armv6pmu_read_counter, - .write_counter = armv6pmu_write_counter, - .get_event_idx = armv6pmu_get_event_idx, - .start = armv6pmu_start, - .stop = armv6pmu_stop, - .num_events = 3, - .max_period = (1LLU << 32) - 1, -}; - -/* - * ARMv6mpcore is almost identical to single core ARMv6 with the exception - * that some of the events have different enumerations and that there is no - * *hack* to stop the programmable counters. To stop the counters we simply - * disable the interrupt reporting and update the event. When unthrottling we - * reset the period and enable the interrupt reporting. - */ -static const struct arm_pmu armv6mpcore_pmu = { - .id = ARM_PERF_PMU_ID_V6MP, - .handle_irq = armv6pmu_handle_irq, - .enable = armv6pmu_enable_event, - .disable = armv6mpcore_pmu_disable_event, - .event_map = armv6mpcore_pmu_event_map, - .raw_event = armv6pmu_raw_event, - .read_counter = armv6pmu_read_counter, - .write_counter = armv6pmu_write_counter, - .get_event_idx = armv6pmu_get_event_idx, - .start = armv6pmu_start, - .stop = armv6pmu_stop, - .num_events = 3, - .max_period = (1LLU << 32) - 1, -}; - -/* - * ARMv7 Cortex-A8 and Cortex-A9 Performance Events handling code. - * - * Copied from ARMv6 code, with the low level code inspired - * by the ARMv7 Oprofile code. - * - * Cortex-A8 has up to 4 configurable performance counters and - * a single cycle counter. - * Cortex-A9 has up to 31 configurable performance counters and - * a single cycle counter. - * - * All counters can be enabled/disabled and IRQ masked separately. The cycle - * counter and all 4 performance counters together can be reset separately. - */ - -/* Common ARMv7 event types */ -enum armv7_perf_types { - ARMV7_PERFCTR_PMNC_SW_INCR = 0x00, - ARMV7_PERFCTR_IFETCH_MISS = 0x01, - ARMV7_PERFCTR_ITLB_MISS = 0x02, - ARMV7_PERFCTR_DCACHE_REFILL = 0x03, - ARMV7_PERFCTR_DCACHE_ACCESS = 0x04, - ARMV7_PERFCTR_DTLB_REFILL = 0x05, - ARMV7_PERFCTR_DREAD = 0x06, - ARMV7_PERFCTR_DWRITE = 0x07, - - ARMV7_PERFCTR_EXC_TAKEN = 0x09, - ARMV7_PERFCTR_EXC_EXECUTED = 0x0A, - ARMV7_PERFCTR_CID_WRITE = 0x0B, - /* ARMV7_PERFCTR_PC_WRITE is equivalent to HW_BRANCH_INSTRUCTIONS. - * It counts: - * - all branch instructions, - * - instructions that explicitly write the PC, - * - exception generating instructions. - */ - ARMV7_PERFCTR_PC_WRITE = 0x0C, - ARMV7_PERFCTR_PC_IMM_BRANCH = 0x0D, - ARMV7_PERFCTR_UNALIGNED_ACCESS = 0x0F, - ARMV7_PERFCTR_PC_BRANCH_MIS_PRED = 0x10, - ARMV7_PERFCTR_CLOCK_CYCLES = 0x11, - - ARMV7_PERFCTR_PC_BRANCH_MIS_USED = 0x12, - - ARMV7_PERFCTR_CPU_CYCLES = 0xFF -}; - -/* ARMv7 Cortex-A8 specific event types */ -enum armv7_a8_perf_types { - ARMV7_PERFCTR_INSTR_EXECUTED = 0x08, - - ARMV7_PERFCTR_PC_PROC_RETURN = 0x0E, - - ARMV7_PERFCTR_WRITE_BUFFER_FULL = 0x40, - ARMV7_PERFCTR_L2_STORE_MERGED = 0x41, - ARMV7_PERFCTR_L2_STORE_BUFF = 0x42, - ARMV7_PERFCTR_L2_ACCESS = 0x43, - ARMV7_PERFCTR_L2_CACH_MISS = 0x44, - ARMV7_PERFCTR_AXI_READ_CYCLES = 0x45, - ARMV7_PERFCTR_AXI_WRITE_CYCLES = 0x46, - ARMV7_PERFCTR_MEMORY_REPLAY = 0x47, - ARMV7_PERFCTR_UNALIGNED_ACCESS_REPLAY = 0x48, - ARMV7_PERFCTR_L1_DATA_MISS = 0x49, - ARMV7_PERFCTR_L1_INST_MISS = 0x4A, - ARMV7_PERFCTR_L1_DATA_COLORING = 0x4B, - ARMV7_PERFCTR_L1_NEON_DATA = 0x4C, - ARMV7_PERFCTR_L1_NEON_CACH_DATA = 0x4D, - ARMV7_PERFCTR_L2_NEON = 0x4E, - ARMV7_PERFCTR_L2_NEON_HIT = 0x4F, - ARMV7_PERFCTR_L1_INST = 0x50, - ARMV7_PERFCTR_PC_RETURN_MIS_PRED = 0x51, - ARMV7_PERFCTR_PC_BRANCH_FAILED = 0x52, - ARMV7_PERFCTR_PC_BRANCH_TAKEN = 0x53, - ARMV7_PERFCTR_PC_BRANCH_EXECUTED = 0x54, - ARMV7_PERFCTR_OP_EXECUTED = 0x55, - ARMV7_PERFCTR_CYCLES_INST_STALL = 0x56, - ARMV7_PERFCTR_CYCLES_INST = 0x57, - ARMV7_PERFCTR_CYCLES_NEON_DATA_STALL = 0x58, - ARMV7_PERFCTR_CYCLES_NEON_INST_STALL = 0x59, - ARMV7_PERFCTR_NEON_CYCLES = 0x5A, - - ARMV7_PERFCTR_PMU0_EVENTS = 0x70, - ARMV7_PERFCTR_PMU1_EVENTS = 0x71, - ARMV7_PERFCTR_PMU_EVENTS = 0x72, -}; - -/* ARMv7 Cortex-A9 specific event types */ -enum armv7_a9_perf_types { - ARMV7_PERFCTR_JAVA_HW_BYTECODE_EXEC = 0x40, - ARMV7_PERFCTR_JAVA_SW_BYTECODE_EXEC = 0x41, - ARMV7_PERFCTR_JAZELLE_BRANCH_EXEC = 0x42, - - ARMV7_PERFCTR_COHERENT_LINE_MISS = 0x50, - ARMV7_PERFCTR_COHERENT_LINE_HIT = 0x51, - - ARMV7_PERFCTR_ICACHE_DEP_STALL_CYCLES = 0x60, - ARMV7_PERFCTR_DCACHE_DEP_STALL_CYCLES = 0x61, - ARMV7_PERFCTR_TLB_MISS_DEP_STALL_CYCLES = 0x62, - ARMV7_PERFCTR_STREX_EXECUTED_PASSED = 0x63, - ARMV7_PERFCTR_STREX_EXECUTED_FAILED = 0x64, - ARMV7_PERFCTR_DATA_EVICTION = 0x65, - ARMV7_PERFCTR_ISSUE_STAGE_NO_INST = 0x66, - ARMV7_PERFCTR_ISSUE_STAGE_EMPTY = 0x67, - ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE = 0x68, - - ARMV7_PERFCTR_PREDICTABLE_FUNCT_RETURNS = 0x6E, - - ARMV7_PERFCTR_MAIN_UNIT_EXECUTED_INST = 0x70, - ARMV7_PERFCTR_SECOND_UNIT_EXECUTED_INST = 0x71, - ARMV7_PERFCTR_LD_ST_UNIT_EXECUTED_INST = 0x72, - ARMV7_PERFCTR_FP_EXECUTED_INST = 0x73, - ARMV7_PERFCTR_NEON_EXECUTED_INST = 0x74, - - ARMV7_PERFCTR_PLD_FULL_DEP_STALL_CYCLES = 0x80, - ARMV7_PERFCTR_DATA_WR_DEP_STALL_CYCLES = 0x81, - ARMV7_PERFCTR_ITLB_MISS_DEP_STALL_CYCLES = 0x82, - ARMV7_PERFCTR_DTLB_MISS_DEP_STALL_CYCLES = 0x83, - ARMV7_PERFCTR_MICRO_ITLB_MISS_DEP_STALL_CYCLES = 0x84, - ARMV7_PERFCTR_MICRO_DTLB_MISS_DEP_STALL_CYCLES = 0x85, - ARMV7_PERFCTR_DMB_DEP_STALL_CYCLES = 0x86, - - ARMV7_PERFCTR_INTGR_CLK_ENABLED_CYCLES = 0x8A, - ARMV7_PERFCTR_DATA_ENGINE_CLK_EN_CYCLES = 0x8B, - - ARMV7_PERFCTR_ISB_INST = 0x90, - ARMV7_PERFCTR_DSB_INST = 0x91, - ARMV7_PERFCTR_DMB_INST = 0x92, - ARMV7_PERFCTR_EXT_INTERRUPTS = 0x93, - - ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_COMPLETED = 0xA0, - ARMV7_PERFCTR_PLE_CACHE_LINE_RQST_SKIPPED = 0xA1, - ARMV7_PERFCTR_PLE_FIFO_FLUSH = 0xA2, - ARMV7_PERFCTR_PLE_RQST_COMPLETED = 0xA3, - ARMV7_PERFCTR_PLE_FIFO_OVERFLOW = 0xA4, - ARMV7_PERFCTR_PLE_RQST_PROG = 0xA5 -}; - -/* - * Cortex-A8 HW events mapping - * - * The hardware events that we support. We do support cache operations but - * we have harvard caches and no way to combine instruction and data - * accesses/misses in hardware. - */ -static const unsigned armv7_a8_perf_map[PERF_COUNT_HW_MAX] = { - [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, - [PERF_COUNT_HW_INSTRUCTIONS] = ARMV7_PERFCTR_INSTR_EXECUTED, - [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, - [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, - [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES, -}; - -static const unsigned armv7_a8_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] - [PERF_COUNT_HW_CACHE_OP_MAX] - [PERF_COUNT_HW_CACHE_RESULT_MAX] = { - [C(L1D)] = { - /* - * The performance counters don't differentiate between read - * and write accesses/misses so this isn't strictly correct, - * but it's the best we can do. Writes and reads get - * combined. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(L1I)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST, - [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L1_INST, - [C(RESULT_MISS)] = ARMV7_PERFCTR_L1_INST_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(LL)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS, - [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_L2_ACCESS, - [C(RESULT_MISS)] = ARMV7_PERFCTR_L2_CACH_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(DTLB)] = { - /* - * Only ITLB misses and DTLB refills are supported. - * If users want the DTLB refills misses a raw counter - * must be used. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(ITLB)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(BPU)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, - [C(RESULT_MISS)] - = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, - [C(RESULT_MISS)] - = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, -}; - -/* - * Cortex-A9 HW events mapping - */ -static const unsigned armv7_a9_perf_map[PERF_COUNT_HW_MAX] = { - [PERF_COUNT_HW_CPU_CYCLES] = ARMV7_PERFCTR_CPU_CYCLES, - [PERF_COUNT_HW_INSTRUCTIONS] = - ARMV7_PERFCTR_INST_OUT_OF_RENAME_STAGE, - [PERF_COUNT_HW_CACHE_REFERENCES] = ARMV7_PERFCTR_COHERENT_LINE_HIT, - [PERF_COUNT_HW_CACHE_MISSES] = ARMV7_PERFCTR_COHERENT_LINE_MISS, - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = ARMV7_PERFCTR_PC_WRITE, - [PERF_COUNT_HW_BRANCH_MISSES] = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, - [PERF_COUNT_HW_BUS_CYCLES] = ARMV7_PERFCTR_CLOCK_CYCLES, -}; - -static const unsigned armv7_a9_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] - [PERF_COUNT_HW_CACHE_OP_MAX] - [PERF_COUNT_HW_CACHE_RESULT_MAX] = { - [C(L1D)] = { - /* - * The performance counters don't differentiate between read - * and write accesses/misses so this isn't strictly correct, - * but it's the best we can do. Writes and reads get - * combined. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DCACHE_REFILL, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(L1I)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_IFETCH_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(LL)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(DTLB)] = { - /* - * Only ITLB misses and DTLB refills are supported. - * If users want the DTLB refills misses a raw counter - * must be used. - */ - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_DTLB_REFILL, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(ITLB)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = ARMV7_PERFCTR_ITLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(BPU)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, - [C(RESULT_MISS)] - = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = ARMV7_PERFCTR_PC_WRITE, - [C(RESULT_MISS)] - = ARMV7_PERFCTR_PC_BRANCH_MIS_PRED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, -}; - -/* - * Perf Events counters - */ -enum armv7_counters { - ARMV7_CYCLE_COUNTER = 1, /* Cycle counter */ - ARMV7_COUNTER0 = 2, /* First event counter */ -}; - -/* - * The cycle counter is ARMV7_CYCLE_COUNTER. - * The first event counter is ARMV7_COUNTER0. - * The last event counter is (ARMV7_COUNTER0 + armpmu->num_events - 1). - */ -#define ARMV7_COUNTER_LAST (ARMV7_COUNTER0 + armpmu->num_events - 1) - -/* - * ARMv7 low level PMNC access - */ - -/* - * Per-CPU PMNC: config reg - */ -#define ARMV7_PMNC_E (1 << 0) /* Enable all counters */ -#define ARMV7_PMNC_P (1 << 1) /* Reset all counters */ -#define ARMV7_PMNC_C (1 << 2) /* Cycle counter reset */ -#define ARMV7_PMNC_D (1 << 3) /* CCNT counts every 64th cpu cycle */ -#define ARMV7_PMNC_X (1 << 4) /* Export to ETM */ -#define ARMV7_PMNC_DP (1 << 5) /* Disable CCNT if non-invasive debug*/ -#define ARMV7_PMNC_N_SHIFT 11 /* Number of counters supported */ -#define ARMV7_PMNC_N_MASK 0x1f -#define ARMV7_PMNC_MASK 0x3f /* Mask for writable bits */ - -/* - * Available counters - */ -#define ARMV7_CNT0 0 /* First event counter */ -#define ARMV7_CCNT 31 /* Cycle counter */ - -/* Perf Event to low level counters mapping */ -#define ARMV7_EVENT_CNT_TO_CNTx (ARMV7_COUNTER0 - ARMV7_CNT0) - -/* - * CNTENS: counters enable reg - */ -#define ARMV7_CNTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) -#define ARMV7_CNTENS_C (1 << ARMV7_CCNT) - -/* - * CNTENC: counters disable reg - */ -#define ARMV7_CNTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) -#define ARMV7_CNTENC_C (1 << ARMV7_CCNT) - -/* - * INTENS: counters overflow interrupt enable reg - */ -#define ARMV7_INTENS_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) -#define ARMV7_INTENS_C (1 << ARMV7_CCNT) - -/* - * INTENC: counters overflow interrupt disable reg - */ -#define ARMV7_INTENC_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) -#define ARMV7_INTENC_C (1 << ARMV7_CCNT) - -/* - * EVTSEL: Event selection reg - */ -#define ARMV7_EVTSEL_MASK 0xff /* Mask for writable bits */ - -/* - * SELECT: Counter selection reg - */ -#define ARMV7_SELECT_MASK 0x1f /* Mask for writable bits */ - -/* - * FLAG: counters overflow flag status reg - */ -#define ARMV7_FLAG_P(idx) (1 << (idx - ARMV7_EVENT_CNT_TO_CNTx)) -#define ARMV7_FLAG_C (1 << ARMV7_CCNT) -#define ARMV7_FLAG_MASK 0xffffffff /* Mask for writable bits */ -#define ARMV7_OVERFLOWED_MASK ARMV7_FLAG_MASK - -static inline unsigned long armv7_pmnc_read(void) -{ - u32 val; - asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r"(val)); - return val; + struct arm_pmu *armpmu = to_arm_pmu(pmu); + armpmu->stop(armpmu); } -static inline void armv7_pmnc_write(unsigned long val) +#ifdef CONFIG_PM_RUNTIME +static int armpmu_runtime_resume(struct device *dev) { - val &= ARMV7_PMNC_MASK; - asm volatile("mcr p15, 0, %0, c9, c12, 0" : : "r"(val)); -} + struct arm_pmu_platdata *plat = dev_get_platdata(dev); -static inline int armv7_pmnc_has_overflowed(unsigned long pmnc) -{ - return pmnc & ARMV7_OVERFLOWED_MASK; -} + if (plat && plat->runtime_resume) + return plat->runtime_resume(dev); -static inline int armv7_pmnc_counter_has_overflowed(unsigned long pmnc, - enum armv7_counters counter) -{ - int ret = 0; - - if (counter == ARMV7_CYCLE_COUNTER) - ret = pmnc & ARMV7_FLAG_C; - else if ((counter >= ARMV7_COUNTER0) && (counter <= ARMV7_COUNTER_LAST)) - ret = pmnc & ARMV7_FLAG_P(counter); - else - pr_err("CPU%u checking wrong counter %d overflow status\n", - smp_processor_id(), counter); - - return ret; -} - -static inline int armv7_pmnc_select_counter(unsigned int idx) -{ - u32 val; - - if ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST)) { - pr_err("CPU%u selecting wrong PMNC counter" - " %d\n", smp_processor_id(), idx); - return -1; - } - - val = (idx - ARMV7_EVENT_CNT_TO_CNTx) & ARMV7_SELECT_MASK; - asm volatile("mcr p15, 0, %0, c9, c12, 5" : : "r" (val)); - - return idx; -} - -static inline u32 armv7pmu_read_counter(int idx) -{ - unsigned long value = 0; - - if (idx == ARMV7_CYCLE_COUNTER) - asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (value)); - else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) { - if (armv7_pmnc_select_counter(idx) == idx) - asm volatile("mrc p15, 0, %0, c9, c13, 2" - : "=r" (value)); - } else - pr_err("CPU%u reading wrong counter %d\n", - smp_processor_id(), idx); - - return value; -} - -static inline void armv7pmu_write_counter(int idx, u32 value) -{ - if (idx == ARMV7_CYCLE_COUNTER) - asm volatile("mcr p15, 0, %0, c9, c13, 0" : : "r" (value)); - else if ((idx >= ARMV7_COUNTER0) && (idx <= ARMV7_COUNTER_LAST)) { - if (armv7_pmnc_select_counter(idx) == idx) - asm volatile("mcr p15, 0, %0, c9, c13, 2" - : : "r" (value)); - } else - pr_err("CPU%u writing wrong counter %d\n", - smp_processor_id(), idx); -} - -static inline void armv7_pmnc_write_evtsel(unsigned int idx, u32 val) -{ - if (armv7_pmnc_select_counter(idx) == idx) { - val &= ARMV7_EVTSEL_MASK; - asm volatile("mcr p15, 0, %0, c9, c13, 1" : : "r" (val)); - } -} - -static inline u32 armv7_pmnc_enable_counter(unsigned int idx) -{ - u32 val; - - if ((idx != ARMV7_CYCLE_COUNTER) && - ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { - pr_err("CPU%u enabling wrong PMNC counter" - " %d\n", smp_processor_id(), idx); - return -1; - } - - if (idx == ARMV7_CYCLE_COUNTER) - val = ARMV7_CNTENS_C; - else - val = ARMV7_CNTENS_P(idx); - - asm volatile("mcr p15, 0, %0, c9, c12, 1" : : "r" (val)); - - return idx; -} - -static inline u32 armv7_pmnc_disable_counter(unsigned int idx) -{ - u32 val; - - - if ((idx != ARMV7_CYCLE_COUNTER) && - ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { - pr_err("CPU%u disabling wrong PMNC counter" - " %d\n", smp_processor_id(), idx); - return -1; - } - - if (idx == ARMV7_CYCLE_COUNTER) - val = ARMV7_CNTENC_C; - else - val = ARMV7_CNTENC_P(idx); - - asm volatile("mcr p15, 0, %0, c9, c12, 2" : : "r" (val)); - - return idx; -} - -static inline u32 armv7_pmnc_enable_intens(unsigned int idx) -{ - u32 val; - - if ((idx != ARMV7_CYCLE_COUNTER) && - ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { - pr_err("CPU%u enabling wrong PMNC counter" - " interrupt enable %d\n", smp_processor_id(), idx); - return -1; - } - - if (idx == ARMV7_CYCLE_COUNTER) - val = ARMV7_INTENS_C; - else - val = ARMV7_INTENS_P(idx); - - asm volatile("mcr p15, 0, %0, c9, c14, 1" : : "r" (val)); - - return idx; -} - -static inline u32 armv7_pmnc_disable_intens(unsigned int idx) -{ - u32 val; - - if ((idx != ARMV7_CYCLE_COUNTER) && - ((idx < ARMV7_COUNTER0) || (idx > ARMV7_COUNTER_LAST))) { - pr_err("CPU%u disabling wrong PMNC counter" - " interrupt enable %d\n", smp_processor_id(), idx); - return -1; - } - - if (idx == ARMV7_CYCLE_COUNTER) - val = ARMV7_INTENC_C; - else - val = ARMV7_INTENC_P(idx); - - asm volatile("mcr p15, 0, %0, c9, c14, 2" : : "r" (val)); - - return idx; -} - -static inline u32 armv7_pmnc_getreset_flags(void) -{ - u32 val; - - /* Read */ - asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val)); - - /* Write to clear flags */ - val &= ARMV7_FLAG_MASK; - asm volatile("mcr p15, 0, %0, c9, c12, 3" : : "r" (val)); - - return val; + return 0; } -#ifdef DEBUG -static void armv7_pmnc_dump_regs(void) +static int armpmu_runtime_suspend(struct device *dev) { - u32 val; - unsigned int cnt; - - printk(KERN_INFO "PMNC registers dump:\n"); - - asm volatile("mrc p15, 0, %0, c9, c12, 0" : "=r" (val)); - printk(KERN_INFO "PMNC =0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c12, 1" : "=r" (val)); - printk(KERN_INFO "CNTENS=0x%08x\n", val); + struct arm_pmu_platdata *plat = dev_get_platdata(dev); - asm volatile("mrc p15, 0, %0, c9, c14, 1" : "=r" (val)); - printk(KERN_INFO "INTENS=0x%08x\n", val); + if (plat && plat->runtime_suspend) + return plat->runtime_suspend(dev); - asm volatile("mrc p15, 0, %0, c9, c12, 3" : "=r" (val)); - printk(KERN_INFO "FLAGS =0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c12, 5" : "=r" (val)); - printk(KERN_INFO "SELECT=0x%08x\n", val); - - asm volatile("mrc p15, 0, %0, c9, c13, 0" : "=r" (val)); - printk(KERN_INFO "CCNT =0x%08x\n", val); - - for (cnt = ARMV7_COUNTER0; cnt < ARMV7_COUNTER_LAST; cnt++) { - armv7_pmnc_select_counter(cnt); - asm volatile("mrc p15, 0, %0, c9, c13, 2" : "=r" (val)); - printk(KERN_INFO "CNT[%d] count =0x%08x\n", - cnt-ARMV7_EVENT_CNT_TO_CNTx, val); - asm volatile("mrc p15, 0, %0, c9, c13, 1" : "=r" (val)); - printk(KERN_INFO "CNT[%d] evtsel=0x%08x\n", - cnt-ARMV7_EVENT_CNT_TO_CNTx, val); - } + return 0; } #endif -void armv7pmu_enable_event(struct hw_perf_event *hwc, int idx) -{ - unsigned long flags; - - /* - * Enable counter and interrupt, and set the counter to count - * the event that we're interested in. - */ - spin_lock_irqsave(&pmu_lock, flags); - - /* - * Disable counter - */ - armv7_pmnc_disable_counter(idx); - - /* - * Set event (if destined for PMNx counters) - * We don't need to set the event if it's a cycle count - */ - if (idx != ARMV7_CYCLE_COUNTER) - armv7_pmnc_write_evtsel(idx, hwc->config_base); - - /* - * Enable interrupt for this counter - */ - armv7_pmnc_enable_intens(idx); - - /* - * Enable counter - */ - armv7_pmnc_enable_counter(idx); - - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void armv7pmu_disable_event(struct hw_perf_event *hwc, int idx) -{ - unsigned long flags; - - /* - * Disable counter and interrupt - */ - spin_lock_irqsave(&pmu_lock, flags); - - /* - * Disable counter - */ - armv7_pmnc_disable_counter(idx); - - /* - * Disable interrupt for this counter - */ - armv7_pmnc_disable_intens(idx); - - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static irqreturn_t armv7pmu_handle_irq(int irq_num, void *dev) -{ - unsigned long pmnc; - struct perf_sample_data data; - struct cpu_hw_events *cpuc; - struct pt_regs *regs; - int idx; - - /* - * Get and reset the IRQ flags - */ - pmnc = armv7_pmnc_getreset_flags(); - - /* - * Did an overflow occur? - */ - if (!armv7_pmnc_has_overflowed(pmnc)) - return IRQ_NONE; - - /* - * Handle the counter(s) overflow(s) - */ - regs = get_irq_regs(); - - perf_sample_data_init(&data, 0); - - cpuc = &__get_cpu_var(cpu_hw_events); - for (idx = 0; idx <= armpmu->num_events; ++idx) { - struct perf_event *event = cpuc->events[idx]; - struct hw_perf_event *hwc; - - if (!test_bit(idx, cpuc->active_mask)) - continue; - - /* - * We have a single interrupt for all counters. Check that - * each counter has overflowed before we process it. - */ - if (!armv7_pmnc_counter_has_overflowed(pmnc, idx)) - continue; - - hwc = &event->hw; - armpmu_event_update(event, hwc, idx); - data.period = event->hw.last_period; - if (!armpmu_event_set_period(event, hwc, idx)) - continue; - - if (perf_event_overflow(event, 0, &data, regs)) - armpmu->disable(hwc, idx); - } - - /* - * Handle the pending perf events. - * - * Note: this call *must* be run with interrupts disabled. For - * platforms that can have the PMU interrupts raised as an NMI, this - * will not work. - */ - irq_work_run(); - - return IRQ_HANDLED; -} - -static void armv7pmu_start(void) -{ - unsigned long flags; - - spin_lock_irqsave(&pmu_lock, flags); - /* Enable all counters */ - armv7_pmnc_write(armv7_pmnc_read() | ARMV7_PMNC_E); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void armv7pmu_stop(void) -{ - unsigned long flags; - - spin_lock_irqsave(&pmu_lock, flags); - /* Disable all counters */ - armv7_pmnc_write(armv7_pmnc_read() & ~ARMV7_PMNC_E); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static inline int armv7_a8_pmu_event_map(int config) -{ - int mapping = armv7_a8_perf_map[config]; - if (HW_OP_UNSUPPORTED == mapping) - mapping = -EOPNOTSUPP; - return mapping; -} - -static inline int armv7_a9_pmu_event_map(int config) -{ - int mapping = armv7_a9_perf_map[config]; - if (HW_OP_UNSUPPORTED == mapping) - mapping = -EOPNOTSUPP; - return mapping; -} - -static u64 armv7pmu_raw_event(u64 config) -{ - return config & 0xff; -} - -static int armv7pmu_get_event_idx(struct cpu_hw_events *cpuc, - struct hw_perf_event *event) -{ - int idx; - - /* Always place a cycle counter into the cycle counter. */ - if (event->config_base == ARMV7_PERFCTR_CPU_CYCLES) { - if (test_and_set_bit(ARMV7_CYCLE_COUNTER, cpuc->used_mask)) - return -EAGAIN; - - return ARMV7_CYCLE_COUNTER; - } else { - /* - * For anything other than a cycle counter, try and use - * the events counters - */ - for (idx = ARMV7_COUNTER0; idx <= armpmu->num_events; ++idx) { - if (!test_and_set_bit(idx, cpuc->used_mask)) - return idx; - } - - /* The counters are all in use. */ - return -EAGAIN; - } -} - -static struct arm_pmu armv7pmu = { - .handle_irq = armv7pmu_handle_irq, - .enable = armv7pmu_enable_event, - .disable = armv7pmu_disable_event, - .raw_event = armv7pmu_raw_event, - .read_counter = armv7pmu_read_counter, - .write_counter = armv7pmu_write_counter, - .get_event_idx = armv7pmu_get_event_idx, - .start = armv7pmu_start, - .stop = armv7pmu_stop, - .max_period = (1LLU << 32) - 1, +const struct dev_pm_ops armpmu_dev_pm_ops = { + SET_RUNTIME_PM_OPS(armpmu_runtime_suspend, armpmu_runtime_resume, NULL) }; -static u32 __init armv7_reset_read_pmnc(void) +static void armpmu_init(struct arm_pmu *armpmu) { - u32 nb_cnt; - - /* Initialize & Reset PMNC: C and P bits */ - armv7_pmnc_write(ARMV7_PMNC_P | ARMV7_PMNC_C); + atomic_set(&armpmu->active_events, 0); + mutex_init(&armpmu->reserve_mutex); - /* Read the nb of CNTx counters supported from PMNC */ - nb_cnt = (armv7_pmnc_read() >> ARMV7_PMNC_N_SHIFT) & ARMV7_PMNC_N_MASK; - - /* Add the CPU cycles counter and return */ - return nb_cnt + 1; + armpmu->pmu = (struct pmu) { + .pmu_enable = armpmu_enable, + .pmu_disable = armpmu_disable, + .event_init = armpmu_event_init, + .add = armpmu_add, + .del = armpmu_del, + .start = armpmu_start, + .stop = armpmu_stop, + .read = armpmu_read, + }; } -/* - * ARMv5 [xscale] Performance counter handling code. - * - * Based on xscale OProfile code. - * - * There are two variants of the xscale PMU that we support: - * - xscale1pmu: 2 event counters and a cycle counter - * - xscale2pmu: 4 event counters and a cycle counter - * The two variants share event definitions, but have different - * PMU structures. - */ - -enum xscale_perf_types { - XSCALE_PERFCTR_ICACHE_MISS = 0x00, - XSCALE_PERFCTR_ICACHE_NO_DELIVER = 0x01, - XSCALE_PERFCTR_DATA_STALL = 0x02, - XSCALE_PERFCTR_ITLB_MISS = 0x03, - XSCALE_PERFCTR_DTLB_MISS = 0x04, - XSCALE_PERFCTR_BRANCH = 0x05, - XSCALE_PERFCTR_BRANCH_MISS = 0x06, - XSCALE_PERFCTR_INSTRUCTION = 0x07, - XSCALE_PERFCTR_DCACHE_FULL_STALL = 0x08, - XSCALE_PERFCTR_DCACHE_FULL_STALL_CONTIG = 0x09, - XSCALE_PERFCTR_DCACHE_ACCESS = 0x0A, - XSCALE_PERFCTR_DCACHE_MISS = 0x0B, - XSCALE_PERFCTR_DCACHE_WRITE_BACK = 0x0C, - XSCALE_PERFCTR_PC_CHANGED = 0x0D, - XSCALE_PERFCTR_BCU_REQUEST = 0x10, - XSCALE_PERFCTR_BCU_FULL = 0x11, - XSCALE_PERFCTR_BCU_DRAIN = 0x12, - XSCALE_PERFCTR_BCU_ECC_NO_ELOG = 0x14, - XSCALE_PERFCTR_BCU_1_BIT_ERR = 0x15, - XSCALE_PERFCTR_RMW = 0x16, - /* XSCALE_PERFCTR_CCNT is not hardware defined */ - XSCALE_PERFCTR_CCNT = 0xFE, - XSCALE_PERFCTR_UNUSED = 0xFF, -}; - -enum xscale_counters { - XSCALE_CYCLE_COUNTER = 1, - XSCALE_COUNTER0, - XSCALE_COUNTER1, - XSCALE_COUNTER2, - XSCALE_COUNTER3, -}; - -static const unsigned xscale_perf_map[PERF_COUNT_HW_MAX] = { - [PERF_COUNT_HW_CPU_CYCLES] = XSCALE_PERFCTR_CCNT, - [PERF_COUNT_HW_INSTRUCTIONS] = XSCALE_PERFCTR_INSTRUCTION, - [PERF_COUNT_HW_CACHE_REFERENCES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_CACHE_MISSES] = HW_OP_UNSUPPORTED, - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = XSCALE_PERFCTR_BRANCH, - [PERF_COUNT_HW_BRANCH_MISSES] = XSCALE_PERFCTR_BRANCH_MISS, - [PERF_COUNT_HW_BUS_CYCLES] = HW_OP_UNSUPPORTED, -}; - -static const unsigned xscale_perf_cache_map[PERF_COUNT_HW_CACHE_MAX] - [PERF_COUNT_HW_CACHE_OP_MAX] - [PERF_COUNT_HW_CACHE_RESULT_MAX] = { - [C(L1D)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = XSCALE_PERFCTR_DCACHE_ACCESS, - [C(RESULT_MISS)] = XSCALE_PERFCTR_DCACHE_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(L1I)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = XSCALE_PERFCTR_ICACHE_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(LL)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(DTLB)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = XSCALE_PERFCTR_DTLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(ITLB)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = XSCALE_PERFCTR_ITLB_MISS, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, - [C(BPU)] = { - [C(OP_READ)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_WRITE)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - [C(OP_PREFETCH)] = { - [C(RESULT_ACCESS)] = CACHE_OP_UNSUPPORTED, - [C(RESULT_MISS)] = CACHE_OP_UNSUPPORTED, - }, - }, -}; - -#define XSCALE_PMU_ENABLE 0x001 -#define XSCALE_PMN_RESET 0x002 -#define XSCALE_CCNT_RESET 0x004 -#define XSCALE_PMU_RESET (CCNT_RESET | PMN_RESET) -#define XSCALE_PMU_CNT64 0x008 - -static inline int -xscalepmu_event_map(int config) -{ - int mapping = xscale_perf_map[config]; - if (HW_OP_UNSUPPORTED == mapping) - mapping = -EOPNOTSUPP; - return mapping; -} - -static u64 -xscalepmu_raw_event(u64 config) -{ - return config & 0xff; -} - -#define XSCALE1_OVERFLOWED_MASK 0x700 -#define XSCALE1_CCOUNT_OVERFLOW 0x400 -#define XSCALE1_COUNT0_OVERFLOW 0x100 -#define XSCALE1_COUNT1_OVERFLOW 0x200 -#define XSCALE1_CCOUNT_INT_EN 0x040 -#define XSCALE1_COUNT0_INT_EN 0x010 -#define XSCALE1_COUNT1_INT_EN 0x020 -#define XSCALE1_COUNT0_EVT_SHFT 12 -#define XSCALE1_COUNT0_EVT_MASK (0xff << XSCALE1_COUNT0_EVT_SHFT) -#define XSCALE1_COUNT1_EVT_SHFT 20 -#define XSCALE1_COUNT1_EVT_MASK (0xff << XSCALE1_COUNT1_EVT_SHFT) - -static inline u32 -xscale1pmu_read_pmnc(void) +int armpmu_register(struct arm_pmu *armpmu, int type) { - u32 val; - asm volatile("mrc p14, 0, %0, c0, c0, 0" : "=r" (val)); - return val; -} - -static inline void -xscale1pmu_write_pmnc(u32 val) -{ - /* upper 4bits and 7, 11 are write-as-0 */ - val &= 0xffff77f; - asm volatile("mcr p14, 0, %0, c0, c0, 0" : : "r" (val)); -} - -static inline int -xscale1_pmnc_counter_has_overflowed(unsigned long pmnc, - enum xscale_counters counter) -{ - int ret = 0; - - switch (counter) { - case XSCALE_CYCLE_COUNTER: - ret = pmnc & XSCALE1_CCOUNT_OVERFLOW; - break; - case XSCALE_COUNTER0: - ret = pmnc & XSCALE1_COUNT0_OVERFLOW; - break; - case XSCALE_COUNTER1: - ret = pmnc & XSCALE1_COUNT1_OVERFLOW; - break; - default: - WARN_ONCE(1, "invalid counter number (%d)\n", counter); - } - - return ret; + armpmu_init(armpmu); + pm_runtime_enable(&armpmu->plat_device->dev); + pr_info("enabled with %s PMU driver, %d counters available\n", + armpmu->name, armpmu->num_events); + return perf_pmu_register(&armpmu->pmu, armpmu->name, type); } -static irqreturn_t -xscale1pmu_handle_irq(int irq_num, void *dev) -{ - unsigned long pmnc; - struct perf_sample_data data; - struct cpu_hw_events *cpuc; - struct pt_regs *regs; - int idx; - - /* - * NOTE: there's an A stepping erratum that states if an overflow - * bit already exists and another occurs, the previous - * Overflow bit gets cleared. There's no workaround. - * Fixed in B stepping or later. - */ - pmnc = xscale1pmu_read_pmnc(); - - /* - * Write the value back to clear the overflow flags. Overflow - * flags remain in pmnc for use below. We also disable the PMU - * while we process the interrupt. - */ - xscale1pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE); - - if (!(pmnc & XSCALE1_OVERFLOWED_MASK)) - return IRQ_NONE; - - regs = get_irq_regs(); - - perf_sample_data_init(&data, 0); - - cpuc = &__get_cpu_var(cpu_hw_events); - for (idx = 0; idx <= armpmu->num_events; ++idx) { - struct perf_event *event = cpuc->events[idx]; - struct hw_perf_event *hwc; - - if (!test_bit(idx, cpuc->active_mask)) - continue; - - if (!xscale1_pmnc_counter_has_overflowed(pmnc, idx)) - continue; - - hwc = &event->hw; - armpmu_event_update(event, hwc, idx); - data.period = event->hw.last_period; - if (!armpmu_event_set_period(event, hwc, idx)) - continue; - - if (perf_event_overflow(event, 0, &data, regs)) - armpmu->disable(hwc, idx); - } - - irq_work_run(); - - /* - * Re-enable the PMU. - */ - pmnc = xscale1pmu_read_pmnc() | XSCALE_PMU_ENABLE; - xscale1pmu_write_pmnc(pmnc); - - return IRQ_HANDLED; -} - -static void -xscale1pmu_enable_event(struct hw_perf_event *hwc, int idx) -{ - unsigned long val, mask, evt, flags; - - switch (idx) { - case XSCALE_CYCLE_COUNTER: - mask = 0; - evt = XSCALE1_CCOUNT_INT_EN; - break; - case XSCALE_COUNTER0: - mask = XSCALE1_COUNT0_EVT_MASK; - evt = (hwc->config_base << XSCALE1_COUNT0_EVT_SHFT) | - XSCALE1_COUNT0_INT_EN; - break; - case XSCALE_COUNTER1: - mask = XSCALE1_COUNT1_EVT_MASK; - evt = (hwc->config_base << XSCALE1_COUNT1_EVT_SHFT) | - XSCALE1_COUNT1_INT_EN; - break; - default: - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - spin_lock_irqsave(&pmu_lock, flags); - val = xscale1pmu_read_pmnc(); - val &= ~mask; - val |= evt; - xscale1pmu_write_pmnc(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void -xscale1pmu_disable_event(struct hw_perf_event *hwc, int idx) -{ - unsigned long val, mask, evt, flags; - - switch (idx) { - case XSCALE_CYCLE_COUNTER: - mask = XSCALE1_CCOUNT_INT_EN; - evt = 0; - break; - case XSCALE_COUNTER0: - mask = XSCALE1_COUNT0_INT_EN | XSCALE1_COUNT0_EVT_MASK; - evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT0_EVT_SHFT; - break; - case XSCALE_COUNTER1: - mask = XSCALE1_COUNT1_INT_EN | XSCALE1_COUNT1_EVT_MASK; - evt = XSCALE_PERFCTR_UNUSED << XSCALE1_COUNT1_EVT_SHFT; - break; - default: - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - spin_lock_irqsave(&pmu_lock, flags); - val = xscale1pmu_read_pmnc(); - val &= ~mask; - val |= evt; - xscale1pmu_write_pmnc(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static int -xscale1pmu_get_event_idx(struct cpu_hw_events *cpuc, - struct hw_perf_event *event) -{ - if (XSCALE_PERFCTR_CCNT == event->config_base) { - if (test_and_set_bit(XSCALE_CYCLE_COUNTER, cpuc->used_mask)) - return -EAGAIN; - - return XSCALE_CYCLE_COUNTER; - } else { - if (!test_and_set_bit(XSCALE_COUNTER1, cpuc->used_mask)) { - return XSCALE_COUNTER1; - } - - if (!test_and_set_bit(XSCALE_COUNTER0, cpuc->used_mask)) { - return XSCALE_COUNTER0; - } - - return -EAGAIN; - } -} - -static void -xscale1pmu_start(void) -{ - unsigned long flags, val; - - spin_lock_irqsave(&pmu_lock, flags); - val = xscale1pmu_read_pmnc(); - val |= XSCALE_PMU_ENABLE; - xscale1pmu_write_pmnc(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void -xscale1pmu_stop(void) -{ - unsigned long flags, val; - - spin_lock_irqsave(&pmu_lock, flags); - val = xscale1pmu_read_pmnc(); - val &= ~XSCALE_PMU_ENABLE; - xscale1pmu_write_pmnc(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static inline u32 -xscale1pmu_read_counter(int counter) -{ - u32 val = 0; - - switch (counter) { - case XSCALE_CYCLE_COUNTER: - asm volatile("mrc p14, 0, %0, c1, c0, 0" : "=r" (val)); - break; - case XSCALE_COUNTER0: - asm volatile("mrc p14, 0, %0, c2, c0, 0" : "=r" (val)); - break; - case XSCALE_COUNTER1: - asm volatile("mrc p14, 0, %0, c3, c0, 0" : "=r" (val)); - break; - } - - return val; -} - -static inline void -xscale1pmu_write_counter(int counter, u32 val) -{ - switch (counter) { - case XSCALE_CYCLE_COUNTER: - asm volatile("mcr p14, 0, %0, c1, c0, 0" : : "r" (val)); - break; - case XSCALE_COUNTER0: - asm volatile("mcr p14, 0, %0, c2, c0, 0" : : "r" (val)); - break; - case XSCALE_COUNTER1: - asm volatile("mcr p14, 0, %0, c3, c0, 0" : : "r" (val)); - break; - } -} - -static const struct arm_pmu xscale1pmu = { - .id = ARM_PERF_PMU_ID_XSCALE1, - .handle_irq = xscale1pmu_handle_irq, - .enable = xscale1pmu_enable_event, - .disable = xscale1pmu_disable_event, - .event_map = xscalepmu_event_map, - .raw_event = xscalepmu_raw_event, - .read_counter = xscale1pmu_read_counter, - .write_counter = xscale1pmu_write_counter, - .get_event_idx = xscale1pmu_get_event_idx, - .start = xscale1pmu_start, - .stop = xscale1pmu_stop, - .num_events = 3, - .max_period = (1LLU << 32) - 1, -}; - -#define XSCALE2_OVERFLOWED_MASK 0x01f -#define XSCALE2_CCOUNT_OVERFLOW 0x001 -#define XSCALE2_COUNT0_OVERFLOW 0x002 -#define XSCALE2_COUNT1_OVERFLOW 0x004 -#define XSCALE2_COUNT2_OVERFLOW 0x008 -#define XSCALE2_COUNT3_OVERFLOW 0x010 -#define XSCALE2_CCOUNT_INT_EN 0x001 -#define XSCALE2_COUNT0_INT_EN 0x002 -#define XSCALE2_COUNT1_INT_EN 0x004 -#define XSCALE2_COUNT2_INT_EN 0x008 -#define XSCALE2_COUNT3_INT_EN 0x010 -#define XSCALE2_COUNT0_EVT_SHFT 0 -#define XSCALE2_COUNT0_EVT_MASK (0xff << XSCALE2_COUNT0_EVT_SHFT) -#define XSCALE2_COUNT1_EVT_SHFT 8 -#define XSCALE2_COUNT1_EVT_MASK (0xff << XSCALE2_COUNT1_EVT_SHFT) -#define XSCALE2_COUNT2_EVT_SHFT 16 -#define XSCALE2_COUNT2_EVT_MASK (0xff << XSCALE2_COUNT2_EVT_SHFT) -#define XSCALE2_COUNT3_EVT_SHFT 24 -#define XSCALE2_COUNT3_EVT_MASK (0xff << XSCALE2_COUNT3_EVT_SHFT) - -static inline u32 -xscale2pmu_read_pmnc(void) -{ - u32 val; - asm volatile("mrc p14, 0, %0, c0, c1, 0" : "=r" (val)); - /* bits 1-2 and 4-23 are read-unpredictable */ - return val & 0xff000009; -} - -static inline void -xscale2pmu_write_pmnc(u32 val) -{ - /* bits 4-23 are write-as-0, 24-31 are write ignored */ - val &= 0xf; - asm volatile("mcr p14, 0, %0, c0, c1, 0" : : "r" (val)); -} - -static inline u32 -xscale2pmu_read_overflow_flags(void) -{ - u32 val; - asm volatile("mrc p14, 0, %0, c5, c1, 0" : "=r" (val)); - return val; -} - -static inline void -xscale2pmu_write_overflow_flags(u32 val) -{ - asm volatile("mcr p14, 0, %0, c5, c1, 0" : : "r" (val)); -} - -static inline u32 -xscale2pmu_read_event_select(void) -{ - u32 val; - asm volatile("mrc p14, 0, %0, c8, c1, 0" : "=r" (val)); - return val; -} - -static inline void -xscale2pmu_write_event_select(u32 val) -{ - asm volatile("mcr p14, 0, %0, c8, c1, 0" : : "r"(val)); -} - -static inline u32 -xscale2pmu_read_int_enable(void) -{ - u32 val; - asm volatile("mrc p14, 0, %0, c4, c1, 0" : "=r" (val)); - return val; -} - -static void -xscale2pmu_write_int_enable(u32 val) -{ - asm volatile("mcr p14, 0, %0, c4, c1, 0" : : "r" (val)); -} - -static inline int -xscale2_pmnc_counter_has_overflowed(unsigned long of_flags, - enum xscale_counters counter) -{ - int ret = 0; - - switch (counter) { - case XSCALE_CYCLE_COUNTER: - ret = of_flags & XSCALE2_CCOUNT_OVERFLOW; - break; - case XSCALE_COUNTER0: - ret = of_flags & XSCALE2_COUNT0_OVERFLOW; - break; - case XSCALE_COUNTER1: - ret = of_flags & XSCALE2_COUNT1_OVERFLOW; - break; - case XSCALE_COUNTER2: - ret = of_flags & XSCALE2_COUNT2_OVERFLOW; - break; - case XSCALE_COUNTER3: - ret = of_flags & XSCALE2_COUNT3_OVERFLOW; - break; - default: - WARN_ONCE(1, "invalid counter number (%d)\n", counter); - } - - return ret; -} - -static irqreturn_t -xscale2pmu_handle_irq(int irq_num, void *dev) -{ - unsigned long pmnc, of_flags; - struct perf_sample_data data; - struct cpu_hw_events *cpuc; - struct pt_regs *regs; - int idx; - - /* Disable the PMU. */ - pmnc = xscale2pmu_read_pmnc(); - xscale2pmu_write_pmnc(pmnc & ~XSCALE_PMU_ENABLE); - - /* Check the overflow flag register. */ - of_flags = xscale2pmu_read_overflow_flags(); - if (!(of_flags & XSCALE2_OVERFLOWED_MASK)) - return IRQ_NONE; - - /* Clear the overflow bits. */ - xscale2pmu_write_overflow_flags(of_flags); - - regs = get_irq_regs(); - - perf_sample_data_init(&data, 0); - - cpuc = &__get_cpu_var(cpu_hw_events); - for (idx = 0; idx <= armpmu->num_events; ++idx) { - struct perf_event *event = cpuc->events[idx]; - struct hw_perf_event *hwc; - - if (!test_bit(idx, cpuc->active_mask)) - continue; - - if (!xscale2_pmnc_counter_has_overflowed(pmnc, idx)) - continue; - - hwc = &event->hw; - armpmu_event_update(event, hwc, idx); - data.period = event->hw.last_period; - if (!armpmu_event_set_period(event, hwc, idx)) - continue; - - if (perf_event_overflow(event, 0, &data, regs)) - armpmu->disable(hwc, idx); - } - - irq_work_run(); - - /* - * Re-enable the PMU. - */ - pmnc = xscale2pmu_read_pmnc() | XSCALE_PMU_ENABLE; - xscale2pmu_write_pmnc(pmnc); - - return IRQ_HANDLED; -} - -static void -xscale2pmu_enable_event(struct hw_perf_event *hwc, int idx) -{ - unsigned long flags, ien, evtsel; - - ien = xscale2pmu_read_int_enable(); - evtsel = xscale2pmu_read_event_select(); - - switch (idx) { - case XSCALE_CYCLE_COUNTER: - ien |= XSCALE2_CCOUNT_INT_EN; - break; - case XSCALE_COUNTER0: - ien |= XSCALE2_COUNT0_INT_EN; - evtsel &= ~XSCALE2_COUNT0_EVT_MASK; - evtsel |= hwc->config_base << XSCALE2_COUNT0_EVT_SHFT; - break; - case XSCALE_COUNTER1: - ien |= XSCALE2_COUNT1_INT_EN; - evtsel &= ~XSCALE2_COUNT1_EVT_MASK; - evtsel |= hwc->config_base << XSCALE2_COUNT1_EVT_SHFT; - break; - case XSCALE_COUNTER2: - ien |= XSCALE2_COUNT2_INT_EN; - evtsel &= ~XSCALE2_COUNT2_EVT_MASK; - evtsel |= hwc->config_base << XSCALE2_COUNT2_EVT_SHFT; - break; - case XSCALE_COUNTER3: - ien |= XSCALE2_COUNT3_INT_EN; - evtsel &= ~XSCALE2_COUNT3_EVT_MASK; - evtsel |= hwc->config_base << XSCALE2_COUNT3_EVT_SHFT; - break; - default: - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - spin_lock_irqsave(&pmu_lock, flags); - xscale2pmu_write_event_select(evtsel); - xscale2pmu_write_int_enable(ien); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void -xscale2pmu_disable_event(struct hw_perf_event *hwc, int idx) -{ - unsigned long flags, ien, evtsel; - - ien = xscale2pmu_read_int_enable(); - evtsel = xscale2pmu_read_event_select(); - - switch (idx) { - case XSCALE_CYCLE_COUNTER: - ien &= ~XSCALE2_CCOUNT_INT_EN; - break; - case XSCALE_COUNTER0: - ien &= ~XSCALE2_COUNT0_INT_EN; - evtsel &= ~XSCALE2_COUNT0_EVT_MASK; - evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT0_EVT_SHFT; - break; - case XSCALE_COUNTER1: - ien &= ~XSCALE2_COUNT1_INT_EN; - evtsel &= ~XSCALE2_COUNT1_EVT_MASK; - evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT1_EVT_SHFT; - break; - case XSCALE_COUNTER2: - ien &= ~XSCALE2_COUNT2_INT_EN; - evtsel &= ~XSCALE2_COUNT2_EVT_MASK; - evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT2_EVT_SHFT; - break; - case XSCALE_COUNTER3: - ien &= ~XSCALE2_COUNT3_INT_EN; - evtsel &= ~XSCALE2_COUNT3_EVT_MASK; - evtsel |= XSCALE_PERFCTR_UNUSED << XSCALE2_COUNT3_EVT_SHFT; - break; - default: - WARN_ONCE(1, "invalid counter number (%d)\n", idx); - return; - } - - spin_lock_irqsave(&pmu_lock, flags); - xscale2pmu_write_event_select(evtsel); - xscale2pmu_write_int_enable(ien); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static int -xscale2pmu_get_event_idx(struct cpu_hw_events *cpuc, - struct hw_perf_event *event) -{ - int idx = xscale1pmu_get_event_idx(cpuc, event); - if (idx >= 0) - goto out; - - if (!test_and_set_bit(XSCALE_COUNTER3, cpuc->used_mask)) - idx = XSCALE_COUNTER3; - else if (!test_and_set_bit(XSCALE_COUNTER2, cpuc->used_mask)) - idx = XSCALE_COUNTER2; -out: - return idx; -} - -static void -xscale2pmu_start(void) -{ - unsigned long flags, val; - - spin_lock_irqsave(&pmu_lock, flags); - val = xscale2pmu_read_pmnc() & ~XSCALE_PMU_CNT64; - val |= XSCALE_PMU_ENABLE; - xscale2pmu_write_pmnc(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static void -xscale2pmu_stop(void) -{ - unsigned long flags, val; - - spin_lock_irqsave(&pmu_lock, flags); - val = xscale2pmu_read_pmnc(); - val &= ~XSCALE_PMU_ENABLE; - xscale2pmu_write_pmnc(val); - spin_unlock_irqrestore(&pmu_lock, flags); -} - -static inline u32 -xscale2pmu_read_counter(int counter) -{ - u32 val = 0; - - switch (counter) { - case XSCALE_CYCLE_COUNTER: - asm volatile("mrc p14, 0, %0, c1, c1, 0" : "=r" (val)); - break; - case XSCALE_COUNTER0: - asm volatile("mrc p14, 0, %0, c0, c2, 0" : "=r" (val)); - break; - case XSCALE_COUNTER1: - asm volatile("mrc p14, 0, %0, c1, c2, 0" : "=r" (val)); - break; - case XSCALE_COUNTER2: - asm volatile("mrc p14, 0, %0, c2, c2, 0" : "=r" (val)); - break; - case XSCALE_COUNTER3: - asm volatile("mrc p14, 0, %0, c3, c2, 0" : "=r" (val)); - break; - } - - return val; -} - -static inline void -xscale2pmu_write_counter(int counter, u32 val) -{ - switch (counter) { - case XSCALE_CYCLE_COUNTER: - asm volatile("mcr p14, 0, %0, c1, c1, 0" : : "r" (val)); - break; - case XSCALE_COUNTER0: - asm volatile("mcr p14, 0, %0, c0, c2, 0" : : "r" (val)); - break; - case XSCALE_COUNTER1: - asm volatile("mcr p14, 0, %0, c1, c2, 0" : : "r" (val)); - break; - case XSCALE_COUNTER2: - asm volatile("mcr p14, 0, %0, c2, c2, 0" : : "r" (val)); - break; - case XSCALE_COUNTER3: - asm volatile("mcr p14, 0, %0, c3, c2, 0" : : "r" (val)); - break; - } -} - -static const struct arm_pmu xscale2pmu = { - .id = ARM_PERF_PMU_ID_XSCALE2, - .handle_irq = xscale2pmu_handle_irq, - .enable = xscale2pmu_enable_event, - .disable = xscale2pmu_disable_event, - .event_map = xscalepmu_event_map, - .raw_event = xscalepmu_raw_event, - .read_counter = xscale2pmu_read_counter, - .write_counter = xscale2pmu_write_counter, - .get_event_idx = xscale2pmu_get_event_idx, - .start = xscale2pmu_start, - .stop = xscale2pmu_stop, - .num_events = 5, - .max_period = (1LLU << 32) - 1, -}; - -static int __init -init_hw_perf_events(void) -{ - unsigned long cpuid = read_cpuid_id(); - unsigned long implementor = (cpuid & 0xFF000000) >> 24; - unsigned long part_number = (cpuid & 0xFFF0); - - /* ARM Ltd CPUs. */ - if (0x41 == implementor) { - switch (part_number) { - case 0xB360: /* ARM1136 */ - case 0xB560: /* ARM1156 */ - case 0xB760: /* ARM1176 */ - armpmu = &armv6pmu; - memcpy(armpmu_perf_cache_map, armv6_perf_cache_map, - sizeof(armv6_perf_cache_map)); - break; - case 0xB020: /* ARM11mpcore */ - armpmu = &armv6mpcore_pmu; - memcpy(armpmu_perf_cache_map, - armv6mpcore_perf_cache_map, - sizeof(armv6mpcore_perf_cache_map)); - break; - case 0xC080: /* Cortex-A8 */ - armv7pmu.id = ARM_PERF_PMU_ID_CA8; - memcpy(armpmu_perf_cache_map, armv7_a8_perf_cache_map, - sizeof(armv7_a8_perf_cache_map)); - armv7pmu.event_map = armv7_a8_pmu_event_map; - armpmu = &armv7pmu; - - /* Reset PMNC and read the nb of CNTx counters - supported */ - armv7pmu.num_events = armv7_reset_read_pmnc(); - break; - case 0xC090: /* Cortex-A9 */ - armv7pmu.id = ARM_PERF_PMU_ID_CA9; - memcpy(armpmu_perf_cache_map, armv7_a9_perf_cache_map, - sizeof(armv7_a9_perf_cache_map)); - armv7pmu.event_map = armv7_a9_pmu_event_map; - armpmu = &armv7pmu; - - /* Reset PMNC and read the nb of CNTx counters - supported */ - armv7pmu.num_events = armv7_reset_read_pmnc(); - break; - } - /* Intel CPUs [xscale]. */ - } else if (0x69 == implementor) { - part_number = (cpuid >> 13) & 0x7; - switch (part_number) { - case 1: - armpmu = &xscale1pmu; - memcpy(armpmu_perf_cache_map, xscale_perf_cache_map, - sizeof(xscale_perf_cache_map)); - break; - case 2: - armpmu = &xscale2pmu; - memcpy(armpmu_perf_cache_map, xscale_perf_cache_map, - sizeof(xscale_perf_cache_map)); - break; - } - } - - if (armpmu) { - pr_info("enabled with %s PMU driver, %d counters available\n", - arm_pmu_names[armpmu->id], armpmu->num_events); - } else { - pr_info("no hardware support available\n"); - } - - perf_pmu_register(&pmu); - - return 0; -} -arch_initcall(init_hw_perf_events); - /* * Callchain handling code. */ @@ -3053,17 +546,17 @@ arch_initcall(init_hw_perf_events); * This code has been adapted from the ARM OProfile support. */ struct frame_tail { - struct frame_tail *fp; - unsigned long sp; - unsigned long lr; + struct frame_tail __user *fp; + unsigned long sp; + unsigned long lr; } __attribute__((packed)); /* * Get the return address for a single stackframe and return a pointer to the * next frame tail. */ -static struct frame_tail * -user_backtrace(struct frame_tail *tail, +static struct frame_tail __user * +user_backtrace(struct frame_tail __user *tail, struct perf_callchain_entry *entry) { struct frame_tail buftail; @@ -3080,7 +573,7 @@ user_backtrace(struct frame_tail *tail, * Frame pointers should strictly progress back up the stack * (towards higher addresses). */ - if (tail >= buftail.fp) + if (tail + 1 >= buftail.fp) return NULL; return buftail.fp - 1; @@ -3089,12 +582,18 @@ user_backtrace(struct frame_tail *tail, void perf_callchain_user(struct perf_callchain_entry *entry, struct pt_regs *regs) { - struct frame_tail *tail; + struct frame_tail __user *tail; + if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) { + /* We don't support guest os callchain now */ + return; + } - tail = (struct frame_tail *)regs->ARM_fp - 1; + perf_callchain_store(entry, regs->ARM_pc); + tail = (struct frame_tail __user *)regs->ARM_fp - 1; - while (tail && !((unsigned long)tail & 0x3)) + while ((entry->nr < PERF_MAX_STACK_DEPTH) && + tail && !((unsigned long)tail & 0x3)) tail = user_backtrace(tail, entry); } @@ -3117,9 +616,41 @@ perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs) { struct stackframe fr; + if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) { + /* We don't support guest os callchain now */ + return; + } + fr.fp = regs->ARM_fp; fr.sp = regs->ARM_sp; fr.lr = regs->ARM_lr; fr.pc = regs->ARM_pc; walk_stackframe(&fr, callchain_trace, entry); } + +unsigned long perf_instruction_pointer(struct pt_regs *regs) +{ + if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) + return perf_guest_cbs->get_guest_ip(); + + return instruction_pointer(regs); +} + +unsigned long perf_misc_flags(struct pt_regs *regs) +{ + int misc = 0; + + if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) { + if (perf_guest_cbs->is_user_mode()) + misc |= PERF_RECORD_MISC_GUEST_USER; + else + misc |= PERF_RECORD_MISC_GUEST_KERNEL; + } else { + if (user_mode(regs)) + misc |= PERF_RECORD_MISC_USER; + else + misc |= PERF_RECORD_MISC_KERNEL; + } + + return misc; +} |