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authorRussell King <rmk+kernel@arm.linux.org.uk>2015-09-03 15:28:50 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2015-09-03 15:28:50 +0100
commit3ff32a0def6e0d2e21a6c5ad1b00726592774018 (patch)
treeaf683b2cb62f7e5ee18cb109d15dcfd43769b984 /arch/arm/kernel
parent40d3f02851577da27b5cbb1538888301245ef1e7 (diff)
parent81497953e37bc28209d9a647171ea93b4a99fc57 (diff)
downloadlinux-linaro-stable-3ff32a0def6e0d2e21a6c5ad1b00726592774018.tar.gz
Merge branch 'devel-stable' into for-linus
Conflicts: drivers/perf/arm_pmu.c
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r--arch/arm/kernel/Makefile5
-rw-r--r--arch/arm/kernel/perf_event.c898
-rw-r--r--arch/arm/kernel/perf_event_v6.c2
-rw-r--r--arch/arm/kernel/perf_event_v7.c2
-rw-r--r--arch/arm/kernel/perf_event_xscale.c2
-rw-r--r--arch/arm/kernel/psci.c299
-rw-r--r--arch/arm/kernel/psci_smp.c31
-rw-r--r--arch/arm/kernel/setup.c3
8 files changed, 30 insertions, 1212 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile
index e69f7a19735d..af9e59bf3831 100644
--- a/arch/arm/kernel/Makefile
+++ b/arch/arm/kernel/Makefile
@@ -71,8 +71,7 @@ obj-$(CONFIG_CPU_PJ4) += pj4-cp0.o
obj-$(CONFIG_CPU_PJ4B) += pj4-cp0.o
obj-$(CONFIG_IWMMXT) += iwmmxt.o
obj-$(CONFIG_PERF_EVENTS) += perf_regs.o perf_callchain.o
-obj-$(CONFIG_HW_PERF_EVENTS) += perf_event.o \
- perf_event_xscale.o perf_event_v6.o \
+obj-$(CONFIG_HW_PERF_EVENTS) += perf_event_xscale.o perf_event_v6.o \
perf_event_v7.o
CFLAGS_pj4-cp0.o := -marm
AFLAGS_iwmmxt.o := -Wa,-mcpu=iwmmxt
@@ -89,7 +88,7 @@ obj-$(CONFIG_EARLY_PRINTK) += early_printk.o
obj-$(CONFIG_ARM_VIRT_EXT) += hyp-stub.o
ifeq ($(CONFIG_ARM_PSCI),y)
-obj-y += psci.o psci-call.o
+obj-y += psci-call.o
obj-$(CONFIG_SMP) += psci_smp.o
endif
diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
deleted file mode 100644
index 7d5379c1c443..000000000000
--- a/arch/arm/kernel/perf_event.c
+++ /dev/null
@@ -1,898 +0,0 @@
-#undef DEBUG
-
-/*
- * ARM performance counter support.
- *
- * Copyright (C) 2009 picoChip Designs, Ltd., Jamie Iles
- * 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.
- */
-#define pr_fmt(fmt) "hw perfevents: " fmt
-
-#include <linux/bitmap.h>
-#include <linux/cpumask.h>
-#include <linux/export.h>
-#include <linux/kernel.h>
-#include <linux/of.h>
-#include <linux/platform_device.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/irq.h>
-#include <linux/irqdesc.h>
-
-#include <asm/cputype.h>
-#include <asm/irq_regs.h>
-#include <asm/pmu.h>
-
-static int
-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;
-
- cache_type = (config >> 0) & 0xff;
- if (cache_type >= PERF_COUNT_HW_CACHE_MAX)
- return -EINVAL;
-
- cache_op = (config >> 8) & 0xff;
- if (cache_op >= PERF_COUNT_HW_CACHE_OP_MAX)
- return -EINVAL;
-
- cache_result = (config >> 16) & 0xff;
- if (cache_result >= PERF_COUNT_HW_CACHE_RESULT_MAX)
- return -EINVAL;
-
- ret = (int)(*cache_map)[cache_type][cache_op][cache_result];
-
- if (ret == CACHE_OP_UNSUPPORTED)
- return -ENOENT;
-
- return ret;
-}
-
-static int
-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;
- int type = event->attr.type;
-
- if (type == event->pmu->type)
- return armpmu_map_raw_event(raw_event_mask, config);
-
- switch (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;
-
- if (unlikely(left <= -period)) {
- left = period;
- local64_set(&hwc->period_left, left);
- hwc->last_period = period;
- ret = 1;
- }
-
- if (unlikely(left <= 0)) {
- left += period;
- local64_set(&hwc->period_left, left);
- hwc->last_period = period;
- ret = 1;
- }
-
- /*
- * Limit the maximum period to prevent the counter value
- * from overtaking the one we are about to program. In
- * effect we are reducing max_period to account for
- * interrupt latency (and we are being very conservative).
- */
- if (left > (armpmu->max_period >> 1))
- left = armpmu->max_period >> 1;
-
- local64_set(&hwc->prev_count, (u64)-left);
-
- armpmu->write_counter(event, (u64)(-left) & 0xffffffff);
-
- perf_event_update_userpage(event);
-
- return ret;
-}
-
-u64 armpmu_event_update(struct perf_event *event)
-{
- 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(event);
-
- if (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
- new_raw_count) != prev_raw_count)
- goto again;
-
- delta = (new_raw_count - prev_raw_count) & armpmu->max_period;
-
- local64_add(delta, &event->count);
- local64_sub(delta, &hwc->period_left);
-
- return new_raw_count;
-}
-
-static void
-armpmu_read(struct perf_event *event)
-{
- 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;
-
- /*
- * 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(event);
- armpmu_event_update(event);
- hwc->state |= PERF_HES_STOPPED | PERF_HES_UPTODATE;
- }
-}
-
-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;
-
- /*
- * ARM pmu always has to reprogram the period, so ignore
- * PERF_EF_RELOAD, see the comment below.
- */
- if (flags & PERF_EF_RELOAD)
- WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
-
- hwc->state = 0;
- /*
- * Set the period again. Some counters can't be stopped, so when we
- * were stopped we simply disabled the IRQ source and the counter
- * may have been left counting. If we don't do this step then we may
- * get an interrupt too soon or *way* too late if the overflow has
- * happened since disabling.
- */
- armpmu_event_set_period(event);
- armpmu->enable(event);
-}
-
-static void
-armpmu_del(struct perf_event *event, int flags)
-{
- struct arm_pmu *armpmu = to_arm_pmu(event->pmu);
- struct pmu_hw_events *hw_events = this_cpu_ptr(armpmu->hw_events);
- struct hw_perf_event *hwc = &event->hw;
- int idx = hwc->idx;
-
- armpmu_stop(event, PERF_EF_UPDATE);
- 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);
-}
-
-static int
-armpmu_add(struct perf_event *event, int flags)
-{
- struct arm_pmu *armpmu = to_arm_pmu(event->pmu);
- struct pmu_hw_events *hw_events = this_cpu_ptr(armpmu->hw_events);
- struct hw_perf_event *hwc = &event->hw;
- int idx;
- int err = 0;
-
- /* An event following a process won't be stopped earlier */
- if (!cpumask_test_cpu(smp_processor_id(), &armpmu->supported_cpus))
- return -ENOENT;
-
- perf_pmu_disable(event->pmu);
-
- /* If we don't have a space for the counter then finish early. */
- idx = armpmu->get_event_idx(hw_events, event);
- if (idx < 0) {
- err = idx;
- goto out;
- }
-
- /*
- * If there is an event in the counter we are going to use then make
- * sure it is disabled.
- */
- event->hw.idx = idx;
- armpmu->disable(event);
- hw_events->events[idx] = event;
-
- hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
- if (flags & PERF_EF_START)
- armpmu_start(event, PERF_EF_RELOAD);
-
- /* Propagate our changes to the userspace mapping. */
- perf_event_update_userpage(event);
-
-out:
- perf_pmu_enable(event->pmu);
- return err;
-}
-
-static int
-validate_event(struct pmu *pmu, struct pmu_hw_events *hw_events,
- struct perf_event *event)
-{
- struct arm_pmu *armpmu;
-
- if (is_software_event(event))
- return 1;
-
- /*
- * Reject groups spanning multiple HW PMUs (e.g. CPU + CCI). The
- * core perf code won't check that the pmu->ctx == leader->ctx
- * until after pmu->event_init(event).
- */
- if (event->pmu != pmu)
- return 0;
-
- if (event->state < PERF_EVENT_STATE_OFF)
- return 1;
-
- if (event->state == PERF_EVENT_STATE_OFF && !event->attr.enable_on_exec)
- return 1;
-
- armpmu = to_arm_pmu(event->pmu);
- 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 pmu_hw_events fake_pmu;
-
- /*
- * Initialise the fake PMU. We only need to populate the
- * used_mask for the purposes of validation.
- */
- memset(&fake_pmu.used_mask, 0, sizeof(fake_pmu.used_mask));
-
- if (!validate_event(event->pmu, &fake_pmu, leader))
- return -EINVAL;
-
- list_for_each_entry(sibling, &leader->sibling_list, group_entry) {
- if (!validate_event(event->pmu, &fake_pmu, sibling))
- return -EINVAL;
- }
-
- if (!validate_event(event->pmu, &fake_pmu, event))
- return -EINVAL;
-
- return 0;
-}
-
-static irqreturn_t armpmu_dispatch_irq(int irq, void *dev)
-{
- struct arm_pmu *armpmu;
- struct platform_device *plat_device;
- struct arm_pmu_platdata *plat;
- int ret;
- u64 start_clock, finish_clock;
-
- /*
- * we request the IRQ with a (possibly percpu) struct arm_pmu**, but
- * the handlers expect a struct arm_pmu*. The percpu_irq framework will
- * do any necessary shifting, we just need to perform the first
- * dereference.
- */
- armpmu = *(void **)dev;
- plat_device = armpmu->plat_device;
- plat = dev_get_platdata(&plat_device->dev);
-
- start_clock = sched_clock();
- if (plat && plat->handle_irq)
- ret = plat->handle_irq(irq, armpmu, armpmu->handle_irq);
- else
- ret = armpmu->handle_irq(irq, armpmu);
- finish_clock = sched_clock();
-
- perf_sample_event_took(finish_clock - start_clock);
- return ret;
-}
-
-static void
-armpmu_release_hardware(struct arm_pmu *armpmu)
-{
- armpmu->free_irq(armpmu);
-}
-
-static int
-armpmu_reserve_hardware(struct arm_pmu *armpmu)
-{
- int err = armpmu->request_irq(armpmu, armpmu_dispatch_irq);
- if (err) {
- armpmu_release_hardware(armpmu);
- return err;
- }
-
- return 0;
-}
-
-static void
-hw_perf_event_destroy(struct perf_event *event)
-{
- struct arm_pmu *armpmu = to_arm_pmu(event->pmu);
- atomic_t *active_events = &armpmu->active_events;
- struct mutex *pmu_reserve_mutex = &armpmu->reserve_mutex;
-
- if (atomic_dec_and_mutex_lock(active_events, pmu_reserve_mutex)) {
- armpmu_release_hardware(armpmu);
- mutex_unlock(pmu_reserve_mutex);
- }
-}
-
-static int
-event_requires_mode_exclusion(struct perf_event_attr *attr)
-{
- 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;
-
- mapping = armpmu->map_event(event);
-
- if (mapping < 0) {
- pr_debug("event %x:%llx not supported\n", event->attr.type,
- event->attr.config);
- return mapping;
- }
-
- /*
- * 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->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.
- */
- hwc->config_base |= (unsigned long)mapping;
-
- 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);
- }
-
- if (event->group_leader != event) {
- if (validate_group(event) != 0)
- return -EINVAL;
- }
-
- 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;
-
- /*
- * Reject CPU-affine events for CPUs that are of a different class to
- * that which this PMU handles. Process-following events (where
- * event->cpu == -1) can be migrated between CPUs, and thus we have to
- * reject them later (in armpmu_add) if they're scheduled on a
- * different class of CPU.
- */
- if (event->cpu != -1 &&
- !cpumask_test_cpu(event->cpu, &armpmu->supported_cpus))
- return -ENOENT;
-
- /* does not support taken branch sampling */
- if (has_branch_stack(event))
- return -EOPNOTSUPP;
-
- if (armpmu->map_event(event) == -ENOENT)
- return -ENOENT;
-
- event->destroy = hw_perf_event_destroy;
-
- 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(&armpmu->reserve_mutex);
- }
-
- if (err)
- return err;
-
- err = __hw_perf_event_init(event);
- if (err)
- hw_perf_event_destroy(event);
-
- return err;
-}
-
-static void armpmu_enable(struct pmu *pmu)
-{
- struct arm_pmu *armpmu = to_arm_pmu(pmu);
- struct pmu_hw_events *hw_events = this_cpu_ptr(armpmu->hw_events);
- int enabled = bitmap_weight(hw_events->used_mask, armpmu->num_events);
-
- /* For task-bound events we may be called on other CPUs */
- if (!cpumask_test_cpu(smp_processor_id(), &armpmu->supported_cpus))
- return;
-
- if (enabled)
- armpmu->start(armpmu);
-}
-
-static void armpmu_disable(struct pmu *pmu)
-{
- struct arm_pmu *armpmu = to_arm_pmu(pmu);
-
- /* For task-bound events we may be called on other CPUs */
- if (!cpumask_test_cpu(smp_processor_id(), &armpmu->supported_cpus))
- return;
-
- armpmu->stop(armpmu);
-}
-
-/*
- * In heterogeneous systems, events are specific to a particular
- * microarchitecture, and aren't suitable for another. Thus, only match CPUs of
- * the same microarchitecture.
- */
-static int armpmu_filter_match(struct perf_event *event)
-{
- struct arm_pmu *armpmu = to_arm_pmu(event->pmu);
- unsigned int cpu = smp_processor_id();
- return cpumask_test_cpu(cpu, &armpmu->supported_cpus);
-}
-
-static void armpmu_init(struct arm_pmu *armpmu)
-{
- atomic_set(&armpmu->active_events, 0);
- mutex_init(&armpmu->reserve_mutex);
-
- 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,
- .filter_match = armpmu_filter_match,
- };
-}
-
-int armpmu_register(struct arm_pmu *armpmu, int type)
-{
- armpmu_init(armpmu);
- 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);
-}
-
-/* Set at runtime when we know what CPU type we are. */
-static struct arm_pmu *__oprofile_cpu_pmu;
-
-/*
- * Despite the names, these two functions are CPU-specific and are used
- * by the OProfile/perf code.
- */
-const char *perf_pmu_name(void)
-{
- if (!__oprofile_cpu_pmu)
- return NULL;
-
- return __oprofile_cpu_pmu->name;
-}
-EXPORT_SYMBOL_GPL(perf_pmu_name);
-
-int perf_num_counters(void)
-{
- int max_events = 0;
-
- if (__oprofile_cpu_pmu != NULL)
- max_events = __oprofile_cpu_pmu->num_events;
-
- return max_events;
-}
-EXPORT_SYMBOL_GPL(perf_num_counters);
-
-static void cpu_pmu_enable_percpu_irq(void *data)
-{
- int irq = *(int *)data;
-
- enable_percpu_irq(irq, IRQ_TYPE_NONE);
-}
-
-static void cpu_pmu_disable_percpu_irq(void *data)
-{
- int irq = *(int *)data;
-
- disable_percpu_irq(irq);
-}
-
-static void cpu_pmu_free_irq(struct arm_pmu *cpu_pmu)
-{
- int i, irq, irqs;
- struct platform_device *pmu_device = cpu_pmu->plat_device;
- struct pmu_hw_events __percpu *hw_events = cpu_pmu->hw_events;
-
- irqs = min(pmu_device->num_resources, num_possible_cpus());
-
- irq = platform_get_irq(pmu_device, 0);
- if (irq >= 0 && irq_is_percpu(irq)) {
- on_each_cpu(cpu_pmu_disable_percpu_irq, &irq, 1);
- free_percpu_irq(irq, &hw_events->percpu_pmu);
- } else {
- for (i = 0; i < irqs; ++i) {
- int cpu = i;
-
- if (cpu_pmu->irq_affinity)
- cpu = cpu_pmu->irq_affinity[i];
-
- if (!cpumask_test_and_clear_cpu(cpu, &cpu_pmu->active_irqs))
- continue;
- irq = platform_get_irq(pmu_device, i);
- if (irq >= 0)
- free_irq(irq, per_cpu_ptr(&hw_events->percpu_pmu, cpu));
- }
- }
-}
-
-static int cpu_pmu_request_irq(struct arm_pmu *cpu_pmu, irq_handler_t handler)
-{
- int i, err, irq, irqs;
- struct platform_device *pmu_device = cpu_pmu->plat_device;
- struct pmu_hw_events __percpu *hw_events = cpu_pmu->hw_events;
-
- if (!pmu_device)
- return -ENODEV;
-
- irqs = min(pmu_device->num_resources, num_possible_cpus());
- if (irqs < 1) {
- pr_warn_once("perf/ARM: No irqs for PMU defined, sampling events not supported\n");
- return 0;
- }
-
- irq = platform_get_irq(pmu_device, 0);
- if (irq >= 0 && irq_is_percpu(irq)) {
- err = request_percpu_irq(irq, handler, "arm-pmu",
- &hw_events->percpu_pmu);
- if (err) {
- pr_err("unable to request IRQ%d for ARM PMU counters\n",
- irq);
- return err;
- }
- on_each_cpu(cpu_pmu_enable_percpu_irq, &irq, 1);
- } else {
- for (i = 0; i < irqs; ++i) {
- int cpu = i;
-
- err = 0;
- irq = platform_get_irq(pmu_device, i);
- if (irq < 0)
- continue;
-
- if (cpu_pmu->irq_affinity)
- cpu = cpu_pmu->irq_affinity[i];
-
- /*
- * If we have a single PMU interrupt that we can't shift,
- * assume that we're running on a uniprocessor machine and
- * continue. Otherwise, continue without this interrupt.
- */
- if (irq_set_affinity(irq, cpumask_of(cpu)) && irqs > 1) {
- pr_warn("unable to set irq affinity (irq=%d, cpu=%u)\n",
- irq, cpu);
- continue;
- }
-
- err = request_irq(irq, handler,
- IRQF_NOBALANCING | IRQF_NO_THREAD, "arm-pmu",
- per_cpu_ptr(&hw_events->percpu_pmu, cpu));
- if (err) {
- pr_err("unable to request IRQ%d for ARM PMU counters\n",
- irq);
- return err;
- }
-
- cpumask_set_cpu(cpu, &cpu_pmu->active_irqs);
- }
- }
-
- return 0;
-}
-
-/*
- * PMU hardware loses all context when a CPU goes offline.
- * When a CPU is hotplugged back in, since some hardware registers are
- * UNKNOWN at reset, the PMU must be explicitly reset to avoid reading
- * junk values out of them.
- */
-static int cpu_pmu_notify(struct notifier_block *b, unsigned long action,
- void *hcpu)
-{
- int cpu = (unsigned long)hcpu;
- struct arm_pmu *pmu = container_of(b, struct arm_pmu, hotplug_nb);
-
- if ((action & ~CPU_TASKS_FROZEN) != CPU_STARTING)
- return NOTIFY_DONE;
-
- if (!cpumask_test_cpu(cpu, &pmu->supported_cpus))
- return NOTIFY_DONE;
-
- if (pmu->reset)
- pmu->reset(pmu);
- else
- return NOTIFY_DONE;
-
- return NOTIFY_OK;
-}
-
-static int cpu_pmu_init(struct arm_pmu *cpu_pmu)
-{
- int err;
- int cpu;
- struct pmu_hw_events __percpu *cpu_hw_events;
-
- cpu_hw_events = alloc_percpu(struct pmu_hw_events);
- if (!cpu_hw_events)
- return -ENOMEM;
-
- cpu_pmu->hotplug_nb.notifier_call = cpu_pmu_notify;
- err = register_cpu_notifier(&cpu_pmu->hotplug_nb);
- if (err)
- goto out_hw_events;
-
- for_each_possible_cpu(cpu) {
- struct pmu_hw_events *events = per_cpu_ptr(cpu_hw_events, cpu);
- raw_spin_lock_init(&events->pmu_lock);
- events->percpu_pmu = cpu_pmu;
- }
-
- cpu_pmu->hw_events = cpu_hw_events;
- cpu_pmu->request_irq = cpu_pmu_request_irq;
- cpu_pmu->free_irq = cpu_pmu_free_irq;
-
- /* Ensure the PMU has sane values out of reset. */
- if (cpu_pmu->reset)
- on_each_cpu_mask(&cpu_pmu->supported_cpus, cpu_pmu->reset,
- cpu_pmu, 1);
-
- /* If no interrupts available, set the corresponding capability flag */
- if (!platform_get_irq(cpu_pmu->plat_device, 0))
- cpu_pmu->pmu.capabilities |= PERF_PMU_CAP_NO_INTERRUPT;
-
- return 0;
-
-out_hw_events:
- free_percpu(cpu_hw_events);
- return err;
-}
-
-static void cpu_pmu_destroy(struct arm_pmu *cpu_pmu)
-{
- unregister_cpu_notifier(&cpu_pmu->hotplug_nb);
- free_percpu(cpu_pmu->hw_events);
-}
-
-/*
- * CPU PMU identification and probing.
- */
-static int probe_current_pmu(struct arm_pmu *pmu,
- const struct pmu_probe_info *info)
-{
- int cpu = get_cpu();
- unsigned int cpuid = read_cpuid_id();
- int ret = -ENODEV;
-
- pr_info("probing PMU on CPU %d\n", cpu);
-
- for (; info->init != NULL; info++) {
- if ((cpuid & info->mask) != info->cpuid)
- continue;
- ret = info->init(pmu);
- break;
- }
-
- put_cpu();
- return ret;
-}
-
-static int of_pmu_irq_cfg(struct arm_pmu *pmu)
-{
- int i, irq, *irqs;
- struct platform_device *pdev = pmu->plat_device;
-
- /* Don't bother with PPIs; they're already affine */
- irq = platform_get_irq(pdev, 0);
- if (irq >= 0 && irq_is_percpu(irq)) {
- cpumask_setall(&pmu->supported_cpus);
- return 0;
- }
-
- irqs = kcalloc(pdev->num_resources, sizeof(*irqs), GFP_KERNEL);
- if (!irqs)
- return -ENOMEM;
-
- for (i = 0; i < pdev->num_resources; ++i) {
- struct device_node *dn;
- int cpu;
-
- dn = of_parse_phandle(pdev->dev.of_node, "interrupt-affinity",
- i);
- if (!dn) {
- pr_warn("Failed to parse %s/interrupt-affinity[%d]\n",
- of_node_full_name(pdev->dev.of_node), i);
- break;
- }
-
- for_each_possible_cpu(cpu)
- if (arch_find_n_match_cpu_physical_id(dn, cpu, NULL))
- break;
-
- if (cpu >= nr_cpu_ids) {
- pr_warn("Failed to find logical CPU for %s\n",
- dn->name);
- of_node_put(dn);
- break;
- }
- of_node_put(dn);
-
- irqs[i] = cpu;
- cpumask_set_cpu(cpu, &pmu->supported_cpus);
- }
-
- if (i == pdev->num_resources) {
- pmu->irq_affinity = irqs;
- } else {
- kfree(irqs);
- cpumask_setall(&pmu->supported_cpus);
- }
-
- return 0;
-}
-
-int arm_pmu_device_probe(struct platform_device *pdev,
- const struct of_device_id *of_table,
- const struct pmu_probe_info *probe_table)
-{
- const struct of_device_id *of_id;
- const int (*init_fn)(struct arm_pmu *);
- struct device_node *node = pdev->dev.of_node;
- struct arm_pmu *pmu;
- int ret = -ENODEV;
-
- pmu = kzalloc(sizeof(struct arm_pmu), GFP_KERNEL);
- if (!pmu) {
- pr_info("failed to allocate PMU device!\n");
- return -ENOMEM;
- }
-
- if (!__oprofile_cpu_pmu)
- __oprofile_cpu_pmu = pmu;
-
- pmu->plat_device = pdev;
-
- if (node && (of_id = of_match_node(of_table, pdev->dev.of_node))) {
- init_fn = of_id->data;
-
- ret = of_pmu_irq_cfg(pmu);
- if (!ret)
- ret = init_fn(pmu);
- } else {
- ret = probe_current_pmu(pmu, probe_table);
- cpumask_setall(&pmu->supported_cpus);
- }
-
- if (ret) {
- pr_info("failed to probe PMU!\n");
- goto out_free;
- }
-
- ret = cpu_pmu_init(pmu);
- if (ret)
- goto out_free;
-
- ret = armpmu_register(pmu, -1);
- if (ret)
- goto out_destroy;
-
- return 0;
-
-out_destroy:
- cpu_pmu_destroy(pmu);
-out_free:
- pr_info("failed to register PMU devices!\n");
- kfree(pmu);
- return ret;
-}
diff --git a/arch/arm/kernel/perf_event_v6.c b/arch/arm/kernel/perf_event_v6.c
index 09f83e414a72..09413e7b49aa 100644
--- a/arch/arm/kernel/perf_event_v6.c
+++ b/arch/arm/kernel/perf_event_v6.c
@@ -34,9 +34,9 @@
#include <asm/cputype.h>
#include <asm/irq_regs.h>
-#include <asm/pmu.h>
#include <linux/of.h>
+#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>
enum armv6_perf_types {
diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c
index f9b37f876e20..126dc679b230 100644
--- a/arch/arm/kernel/perf_event_v7.c
+++ b/arch/arm/kernel/perf_event_v7.c
@@ -21,11 +21,11 @@
#include <asm/cp15.h>
#include <asm/cputype.h>
#include <asm/irq_regs.h>
-#include <asm/pmu.h>
#include <asm/vfp.h>
#include "../vfp/vfpinstr.h"
#include <linux/of.h>
+#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>
/*
diff --git a/arch/arm/kernel/perf_event_xscale.c b/arch/arm/kernel/perf_event_xscale.c
index 304d056d5b25..aa0499e2eef7 100644
--- a/arch/arm/kernel/perf_event_xscale.c
+++ b/arch/arm/kernel/perf_event_xscale.c
@@ -16,9 +16,9 @@
#include <asm/cputype.h>
#include <asm/irq_regs.h>
-#include <asm/pmu.h>
#include <linux/of.h>
+#include <linux/perf/arm_pmu.h>
#include <linux/platform_device.h>
enum xscale_perf_types {
diff --git a/arch/arm/kernel/psci.c b/arch/arm/kernel/psci.c
deleted file mode 100644
index f90fdf4ce7c7..000000000000
--- a/arch/arm/kernel/psci.c
+++ /dev/null
@@ -1,299 +0,0 @@
-/*
- * 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.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * Copyright (C) 2012 ARM Limited
- *
- * Author: Will Deacon <will.deacon@arm.com>
- */
-
-#define pr_fmt(fmt) "psci: " fmt
-
-#include <linux/init.h>
-#include <linux/of.h>
-#include <linux/reboot.h>
-#include <linux/pm.h>
-#include <uapi/linux/psci.h>
-
-#include <asm/compiler.h>
-#include <asm/errno.h>
-#include <asm/psci.h>
-#include <asm/system_misc.h>
-
-struct psci_operations psci_ops;
-
-static int (*invoke_psci_fn)(u32, u32, u32, u32);
-typedef int (*psci_initcall_t)(const struct device_node *);
-
-asmlinkage int __invoke_psci_fn_hvc(u32, u32, u32, u32);
-asmlinkage int __invoke_psci_fn_smc(u32, u32, u32, u32);
-
-enum psci_function {
- PSCI_FN_CPU_SUSPEND,
- PSCI_FN_CPU_ON,
- PSCI_FN_CPU_OFF,
- PSCI_FN_MIGRATE,
- PSCI_FN_AFFINITY_INFO,
- PSCI_FN_MIGRATE_INFO_TYPE,
- PSCI_FN_MAX,
-};
-
-static u32 psci_function_id[PSCI_FN_MAX];
-
-static int psci_to_linux_errno(int errno)
-{
- switch (errno) {
- case PSCI_RET_SUCCESS:
- return 0;
- case PSCI_RET_NOT_SUPPORTED:
- return -EOPNOTSUPP;
- case PSCI_RET_INVALID_PARAMS:
- return -EINVAL;
- case PSCI_RET_DENIED:
- return -EPERM;
- };
-
- return -EINVAL;
-}
-
-static u32 psci_power_state_pack(struct psci_power_state state)
-{
- return ((state.id << PSCI_0_2_POWER_STATE_ID_SHIFT)
- & PSCI_0_2_POWER_STATE_ID_MASK) |
- ((state.type << PSCI_0_2_POWER_STATE_TYPE_SHIFT)
- & PSCI_0_2_POWER_STATE_TYPE_MASK) |
- ((state.affinity_level << PSCI_0_2_POWER_STATE_AFFL_SHIFT)
- & PSCI_0_2_POWER_STATE_AFFL_MASK);
-}
-
-static int psci_get_version(void)
-{
- int err;
-
- err = invoke_psci_fn(PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0);
- return err;
-}
-
-static int psci_cpu_suspend(struct psci_power_state state,
- unsigned long entry_point)
-{
- int err;
- u32 fn, power_state;
-
- fn = psci_function_id[PSCI_FN_CPU_SUSPEND];
- power_state = psci_power_state_pack(state);
- err = invoke_psci_fn(fn, power_state, entry_point, 0);
- return psci_to_linux_errno(err);
-}
-
-static int psci_cpu_off(struct psci_power_state state)
-{
- int err;
- u32 fn, power_state;
-
- fn = psci_function_id[PSCI_FN_CPU_OFF];
- power_state = psci_power_state_pack(state);
- err = invoke_psci_fn(fn, power_state, 0, 0);
- return psci_to_linux_errno(err);
-}
-
-static int psci_cpu_on(unsigned long cpuid, unsigned long entry_point)
-{
- int err;
- u32 fn;
-
- fn = psci_function_id[PSCI_FN_CPU_ON];
- err = invoke_psci_fn(fn, cpuid, entry_point, 0);
- return psci_to_linux_errno(err);
-}
-
-static int psci_migrate(unsigned long cpuid)
-{
- int err;
- u32 fn;
-
- fn = psci_function_id[PSCI_FN_MIGRATE];
- err = invoke_psci_fn(fn, cpuid, 0, 0);
- return psci_to_linux_errno(err);
-}
-
-static int psci_affinity_info(unsigned long target_affinity,
- unsigned long lowest_affinity_level)
-{
- int err;
- u32 fn;
-
- fn = psci_function_id[PSCI_FN_AFFINITY_INFO];
- err = invoke_psci_fn(fn, target_affinity, lowest_affinity_level, 0);
- return err;
-}
-
-static int psci_migrate_info_type(void)
-{
- int err;
- u32 fn;
-
- fn = psci_function_id[PSCI_FN_MIGRATE_INFO_TYPE];
- err = invoke_psci_fn(fn, 0, 0, 0);
- return err;
-}
-
-static int get_set_conduit_method(struct device_node *np)
-{
- const char *method;
-
- pr_info("probing for conduit method from DT.\n");
-
- if (of_property_read_string(np, "method", &method)) {
- pr_warn("missing \"method\" property\n");
- return -ENXIO;
- }
-
- if (!strcmp("hvc", method)) {
- invoke_psci_fn = __invoke_psci_fn_hvc;
- } else if (!strcmp("smc", method)) {
- invoke_psci_fn = __invoke_psci_fn_smc;
- } else {
- pr_warn("invalid \"method\" property: %s\n", method);
- return -EINVAL;
- }
- return 0;
-}
-
-static void psci_sys_reset(enum reboot_mode reboot_mode, const char *cmd)
-{
- invoke_psci_fn(PSCI_0_2_FN_SYSTEM_RESET, 0, 0, 0);
-}
-
-static void psci_sys_poweroff(void)
-{
- invoke_psci_fn(PSCI_0_2_FN_SYSTEM_OFF, 0, 0, 0);
-}
-
-/*
- * PSCI Function IDs for v0.2+ are well defined so use
- * standard values.
- */
-static int psci_0_2_init(struct device_node *np)
-{
- int err, ver;
-
- err = get_set_conduit_method(np);
-
- if (err)
- goto out_put_node;
-
- ver = psci_get_version();
-
- if (ver == PSCI_RET_NOT_SUPPORTED) {
- /* PSCI v0.2 mandates implementation of PSCI_ID_VERSION. */
- pr_err("PSCI firmware does not comply with the v0.2 spec.\n");
- err = -EOPNOTSUPP;
- goto out_put_node;
- } else {
- pr_info("PSCIv%d.%d detected in firmware.\n",
- PSCI_VERSION_MAJOR(ver),
- PSCI_VERSION_MINOR(ver));
-
- if (PSCI_VERSION_MAJOR(ver) == 0 &&
- PSCI_VERSION_MINOR(ver) < 2) {
- err = -EINVAL;
- pr_err("Conflicting PSCI version detected.\n");
- goto out_put_node;
- }
- }
-
- pr_info("Using standard PSCI v0.2 function IDs\n");
- psci_function_id[PSCI_FN_CPU_SUSPEND] = PSCI_0_2_FN_CPU_SUSPEND;
- psci_ops.cpu_suspend = psci_cpu_suspend;
-
- psci_function_id[PSCI_FN_CPU_OFF] = PSCI_0_2_FN_CPU_OFF;
- psci_ops.cpu_off = psci_cpu_off;
-
- psci_function_id[PSCI_FN_CPU_ON] = PSCI_0_2_FN_CPU_ON;
- psci_ops.cpu_on = psci_cpu_on;
-
- psci_function_id[PSCI_FN_MIGRATE] = PSCI_0_2_FN_MIGRATE;
- psci_ops.migrate = psci_migrate;
-
- psci_function_id[PSCI_FN_AFFINITY_INFO] = PSCI_0_2_FN_AFFINITY_INFO;
- psci_ops.affinity_info = psci_affinity_info;
-
- psci_function_id[PSCI_FN_MIGRATE_INFO_TYPE] =
- PSCI_0_2_FN_MIGRATE_INFO_TYPE;
- psci_ops.migrate_info_type = psci_migrate_info_type;
-
- arm_pm_restart = psci_sys_reset;
-
- pm_power_off = psci_sys_poweroff;
-
-out_put_node:
- of_node_put(np);
- return err;
-}
-
-/*
- * PSCI < v0.2 get PSCI Function IDs via DT.
- */
-static int psci_0_1_init(struct device_node *np)
-{
- u32 id;
- int err;
-
- err = get_set_conduit_method(np);
-
- if (err)
- goto out_put_node;
-
- pr_info("Using PSCI v0.1 Function IDs from DT\n");
-
- if (!of_property_read_u32(np, "cpu_suspend", &id)) {
- psci_function_id[PSCI_FN_CPU_SUSPEND] = id;
- psci_ops.cpu_suspend = psci_cpu_suspend;
- }
-
- if (!of_property_read_u32(np, "cpu_off", &id)) {
- psci_function_id[PSCI_FN_CPU_OFF] = id;
- psci_ops.cpu_off = psci_cpu_off;
- }
-
- if (!of_property_read_u32(np, "cpu_on", &id)) {
- psci_function_id[PSCI_FN_CPU_ON] = id;
- psci_ops.cpu_on = psci_cpu_on;
- }
-
- if (!of_property_read_u32(np, "migrate", &id)) {
- psci_function_id[PSCI_FN_MIGRATE] = id;
- psci_ops.migrate = psci_migrate;
- }
-
-out_put_node:
- of_node_put(np);
- return err;
-}
-
-static const struct of_device_id psci_of_match[] __initconst = {
- { .compatible = "arm,psci", .data = psci_0_1_init},
- { .compatible = "arm,psci-0.2", .data = psci_0_2_init},
- {},
-};
-
-int __init psci_init(void)
-{
- struct device_node *np;
- const struct of_device_id *matched_np;
- psci_initcall_t init_fn;
-
- np = of_find_matching_node_and_match(NULL, psci_of_match, &matched_np);
- if (!np)
- return -ENODEV;
-
- init_fn = (psci_initcall_t)matched_np->data;
- return init_fn(np);
-}
diff --git a/arch/arm/kernel/psci_smp.c b/arch/arm/kernel/psci_smp.c
index 28a1db4da704..61c04b02faeb 100644
--- a/arch/arm/kernel/psci_smp.c
+++ b/arch/arm/kernel/psci_smp.c
@@ -17,6 +17,8 @@
#include <linux/smp.h>
#include <linux/of.h>
#include <linux/delay.h>
+#include <linux/psci.h>
+
#include <uapi/linux/psci.h>
#include <asm/psci.h>
@@ -51,22 +53,34 @@ static int psci_boot_secondary(unsigned int cpu, struct task_struct *idle)
{
if (psci_ops.cpu_on)
return psci_ops.cpu_on(cpu_logical_map(cpu),
- __pa(secondary_startup));
+ virt_to_idmap(&secondary_startup));
return -ENODEV;
}
#ifdef CONFIG_HOTPLUG_CPU
+int psci_cpu_disable(unsigned int cpu)
+{
+ /* Fail early if we don't have CPU_OFF support */
+ if (!psci_ops.cpu_off)
+ return -EOPNOTSUPP;
+
+ /* Trusted OS will deny CPU_OFF */
+ if (psci_tos_resident_on(cpu))
+ return -EPERM;
+
+ return 0;
+}
+
void __ref psci_cpu_die(unsigned int cpu)
{
- const struct psci_power_state ps = {
- .type = PSCI_POWER_STATE_TYPE_POWER_DOWN,
- };
+ u32 state = PSCI_POWER_STATE_TYPE_POWER_DOWN <<
+ PSCI_0_2_POWER_STATE_TYPE_SHIFT;
- if (psci_ops.cpu_off)
- psci_ops.cpu_off(ps);
+ if (psci_ops.cpu_off)
+ psci_ops.cpu_off(state);
- /* We should never return */
- panic("psci: cpu %d failed to shutdown\n", cpu);
+ /* We should never return */
+ panic("psci: cpu %d failed to shutdown\n", cpu);
}
int __ref psci_cpu_kill(unsigned int cpu)
@@ -109,6 +123,7 @@ bool __init psci_smp_available(void)
struct smp_operations __initdata psci_smp_ops = {
.smp_boot_secondary = psci_boot_secondary,
#ifdef CONFIG_HOTPLUG_CPU
+ .cpu_disable = psci_cpu_disable,
.cpu_die = psci_cpu_die,
.cpu_kill = psci_cpu_kill,
#endif
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index e2ecee6b70ca..20edd349d379 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -31,6 +31,7 @@
#include <linux/bug.h>
#include <linux/compiler.h>
#include <linux/sort.h>
+#include <linux/psci.h>
#include <asm/unified.h>
#include <asm/cp15.h>
@@ -976,7 +977,7 @@ void __init setup_arch(char **cmdline_p)
unflatten_device_tree();
arm_dt_init_cpu_maps();
- psci_init();
+ psci_dt_init();
xen_early_init();
#ifdef CONFIG_SMP
if (is_smp()) {