Merge branch 'for-next/perf' of git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into aarch64/for-next/core
Pull in arm perf updates, including support for 64-bit (chained) event
counters and some non-critical fixes for some of the system PMU drivers.
Signed-off-by: Will Deacon <will.deacon@arm.com>
diff --git a/arch/arm/kernel/perf_event_v6.c b/arch/arm/kernel/perf_event_v6.c
index be42c4f..1ae99de 100644
--- a/arch/arm/kernel/perf_event_v6.c
+++ b/arch/arm/kernel/perf_event_v6.c
@@ -233,7 +233,7 @@ armv6_pmcr_counter_has_overflowed(unsigned long pmcr,
return ret;
}
-static inline u32 armv6pmu_read_counter(struct perf_event *event)
+static inline u64 armv6pmu_read_counter(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
@@ -251,7 +251,7 @@ static inline u32 armv6pmu_read_counter(struct perf_event *event)
return value;
}
-static inline void armv6pmu_write_counter(struct perf_event *event, u32 value)
+static inline void armv6pmu_write_counter(struct perf_event *event, u64 value)
{
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
@@ -411,6 +411,12 @@ armv6pmu_get_event_idx(struct pmu_hw_events *cpuc,
}
}
+static void armv6pmu_clear_event_idx(struct pmu_hw_events *cpuc,
+ struct perf_event *event)
+{
+ clear_bit(event->hw.idx, cpuc->used_mask);
+}
+
static void armv6pmu_disable_event(struct perf_event *event)
{
unsigned long val, mask, evt, flags;
@@ -491,11 +497,11 @@ static void armv6pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->read_counter = armv6pmu_read_counter;
cpu_pmu->write_counter = armv6pmu_write_counter;
cpu_pmu->get_event_idx = armv6pmu_get_event_idx;
+ cpu_pmu->clear_event_idx = armv6pmu_clear_event_idx;
cpu_pmu->start = armv6pmu_start;
cpu_pmu->stop = armv6pmu_stop;
cpu_pmu->map_event = armv6_map_event;
cpu_pmu->num_events = 3;
- cpu_pmu->max_period = (1LLU << 32) - 1;
}
static int armv6_1136_pmu_init(struct arm_pmu *cpu_pmu)
@@ -542,11 +548,11 @@ static int armv6mpcore_pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->read_counter = armv6pmu_read_counter;
cpu_pmu->write_counter = armv6pmu_write_counter;
cpu_pmu->get_event_idx = armv6pmu_get_event_idx;
+ cpu_pmu->clear_event_idx = armv6pmu_clear_event_idx;
cpu_pmu->start = armv6pmu_start;
cpu_pmu->stop = armv6pmu_stop;
cpu_pmu->map_event = armv6mpcore_map_event;
cpu_pmu->num_events = 3;
- cpu_pmu->max_period = (1LLU << 32) - 1;
return 0;
}
diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c
index 57f01e0..a4fb0f8 100644
--- a/arch/arm/kernel/perf_event_v7.c
+++ b/arch/arm/kernel/perf_event_v7.c
@@ -743,7 +743,7 @@ static inline void armv7_pmnc_select_counter(int idx)
isb();
}
-static inline u32 armv7pmu_read_counter(struct perf_event *event)
+static inline u64 armv7pmu_read_counter(struct perf_event *event)
{
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
@@ -763,7 +763,7 @@ static inline u32 armv7pmu_read_counter(struct perf_event *event)
return value;
}
-static inline void armv7pmu_write_counter(struct perf_event *event, u32 value)
+static inline void armv7pmu_write_counter(struct perf_event *event, u64 value)
{
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
@@ -1058,6 +1058,12 @@ static int armv7pmu_get_event_idx(struct pmu_hw_events *cpuc,
return -EAGAIN;
}
+static void armv7pmu_clear_event_idx(struct pmu_hw_events *cpuc,
+ struct perf_event *event)
+{
+ clear_bit(event->hw.idx, cpuc->used_mask);
+}
+
/*
* Add an event filter to a given event. This will only work for PMUv2 PMUs.
*/
@@ -1167,10 +1173,10 @@ static void armv7pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->read_counter = armv7pmu_read_counter;
cpu_pmu->write_counter = armv7pmu_write_counter;
cpu_pmu->get_event_idx = armv7pmu_get_event_idx;
+ cpu_pmu->clear_event_idx = armv7pmu_clear_event_idx;
cpu_pmu->start = armv7pmu_start;
cpu_pmu->stop = armv7pmu_stop;
cpu_pmu->reset = armv7pmu_reset;
- cpu_pmu->max_period = (1LLU << 32) - 1;
};
static void armv7_read_num_pmnc_events(void *info)
@@ -1638,6 +1644,7 @@ static void krait_pmu_clear_event_idx(struct pmu_hw_events *cpuc,
bool venum_event = EVENT_VENUM(hwc->config_base);
bool krait_event = EVENT_CPU(hwc->config_base);
+ armv7pmu_clear_event_idx(cpuc, event);
if (venum_event || krait_event) {
bit = krait_event_to_bit(event, region, group);
clear_bit(bit, cpuc->used_mask);
@@ -1967,6 +1974,7 @@ static void scorpion_pmu_clear_event_idx(struct pmu_hw_events *cpuc,
bool venum_event = EVENT_VENUM(hwc->config_base);
bool scorpion_event = EVENT_CPU(hwc->config_base);
+ armv7pmu_clear_event_idx(cpuc, event);
if (venum_event || scorpion_event) {
bit = scorpion_event_to_bit(event, region, group);
clear_bit(bit, cpuc->used_mask);
@@ -2030,6 +2038,7 @@ static struct platform_driver armv7_pmu_driver = {
.driver = {
.name = "armv7-pmu",
.of_match_table = armv7_pmu_of_device_ids,
+ .suppress_bind_attrs = true,
},
.probe = armv7_pmu_device_probe,
};
diff --git a/arch/arm/kernel/perf_event_xscale.c b/arch/arm/kernel/perf_event_xscale.c
index 88d1a76..f6cdcac 100644
--- a/arch/arm/kernel/perf_event_xscale.c
+++ b/arch/arm/kernel/perf_event_xscale.c
@@ -292,6 +292,12 @@ xscale1pmu_get_event_idx(struct pmu_hw_events *cpuc,
}
}
+static void xscalepmu_clear_event_idx(struct pmu_hw_events *cpuc,
+ struct perf_event *event)
+{
+ clear_bit(event->hw.idx, cpuc->used_mask);
+}
+
static void xscale1pmu_start(struct arm_pmu *cpu_pmu)
{
unsigned long flags, val;
@@ -316,7 +322,7 @@ static void xscale1pmu_stop(struct arm_pmu *cpu_pmu)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
-static inline u32 xscale1pmu_read_counter(struct perf_event *event)
+static inline u64 xscale1pmu_read_counter(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
@@ -337,7 +343,7 @@ static inline u32 xscale1pmu_read_counter(struct perf_event *event)
return val;
}
-static inline void xscale1pmu_write_counter(struct perf_event *event, u32 val)
+static inline void xscale1pmu_write_counter(struct perf_event *event, u64 val)
{
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
@@ -370,11 +376,11 @@ static int xscale1pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->read_counter = xscale1pmu_read_counter;
cpu_pmu->write_counter = xscale1pmu_write_counter;
cpu_pmu->get_event_idx = xscale1pmu_get_event_idx;
+ cpu_pmu->clear_event_idx = xscalepmu_clear_event_idx;
cpu_pmu->start = xscale1pmu_start;
cpu_pmu->stop = xscale1pmu_stop;
cpu_pmu->map_event = xscale_map_event;
cpu_pmu->num_events = 3;
- cpu_pmu->max_period = (1LLU << 32) - 1;
return 0;
}
@@ -679,7 +685,7 @@ static void xscale2pmu_stop(struct arm_pmu *cpu_pmu)
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
-static inline u32 xscale2pmu_read_counter(struct perf_event *event)
+static inline u64 xscale2pmu_read_counter(struct perf_event *event)
{
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
@@ -706,7 +712,7 @@ static inline u32 xscale2pmu_read_counter(struct perf_event *event)
return val;
}
-static inline void xscale2pmu_write_counter(struct perf_event *event, u32 val)
+static inline void xscale2pmu_write_counter(struct perf_event *event, u64 val)
{
struct hw_perf_event *hwc = &event->hw;
int counter = hwc->idx;
@@ -739,11 +745,11 @@ static int xscale2pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->read_counter = xscale2pmu_read_counter;
cpu_pmu->write_counter = xscale2pmu_write_counter;
cpu_pmu->get_event_idx = xscale2pmu_get_event_idx;
+ cpu_pmu->clear_event_idx = xscalepmu_clear_event_idx;
cpu_pmu->start = xscale2pmu_start;
cpu_pmu->stop = xscale2pmu_stop;
cpu_pmu->map_event = xscale_map_event;
cpu_pmu->num_events = 5;
- cpu_pmu->max_period = (1LLU << 32) - 1;
return 0;
}
diff --git a/arch/arm64/kernel/perf_event.c b/arch/arm64/kernel/perf_event.c
index 33147aa..dfff5ed 100644
--- a/arch/arm64/kernel/perf_event.c
+++ b/arch/arm64/kernel/perf_event.c
@@ -446,9 +446,16 @@ static struct attribute_group armv8_pmuv3_events_attr_group = {
};
PMU_FORMAT_ATTR(event, "config:0-15");
+PMU_FORMAT_ATTR(long, "config1:0");
+
+static inline bool armv8pmu_event_is_64bit(struct perf_event *event)
+{
+ return event->attr.config1 & 0x1;
+}
static struct attribute *armv8_pmuv3_format_attrs[] = {
&format_attr_event.attr,
+ &format_attr_long.attr,
NULL,
};
@@ -466,6 +473,21 @@ static struct attribute_group armv8_pmuv3_format_attr_group = {
(ARMV8_IDX_CYCLE_COUNTER + cpu_pmu->num_events - 1)
/*
+ * We must chain two programmable counters for 64 bit events,
+ * except when we have allocated the 64bit cycle counter (for CPU
+ * cycles event). This must be called only when the event has
+ * a counter allocated.
+ */
+static inline bool armv8pmu_event_is_chained(struct perf_event *event)
+{
+ int idx = event->hw.idx;
+
+ return !WARN_ON(idx < 0) &&
+ armv8pmu_event_is_64bit(event) &&
+ (idx != ARMV8_IDX_CYCLE_COUNTER);
+}
+
+/*
* ARMv8 low level PMU access
*/
@@ -503,34 +525,68 @@ static inline int armv8pmu_counter_has_overflowed(u32 pmnc, int idx)
return pmnc & BIT(ARMV8_IDX_TO_COUNTER(idx));
}
-static inline int armv8pmu_select_counter(int idx)
+static inline void armv8pmu_select_counter(int idx)
{
u32 counter = ARMV8_IDX_TO_COUNTER(idx);
write_sysreg(counter, pmselr_el0);
isb();
-
- return idx;
}
-static inline u32 armv8pmu_read_counter(struct perf_event *event)
+static inline u32 armv8pmu_read_evcntr(int idx)
+{
+ armv8pmu_select_counter(idx);
+ return read_sysreg(pmxevcntr_el0);
+}
+
+static inline u64 armv8pmu_read_hw_counter(struct perf_event *event)
+{
+ int idx = event->hw.idx;
+ u64 val = 0;
+
+ val = armv8pmu_read_evcntr(idx);
+ if (armv8pmu_event_is_chained(event))
+ val = (val << 32) | armv8pmu_read_evcntr(idx - 1);
+ return val;
+}
+
+static inline u64 armv8pmu_read_counter(struct perf_event *event)
{
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
int idx = hwc->idx;
- u32 value = 0;
+ u64 value = 0;
if (!armv8pmu_counter_valid(cpu_pmu, idx))
pr_err("CPU%u reading wrong counter %d\n",
smp_processor_id(), idx);
else if (idx == ARMV8_IDX_CYCLE_COUNTER)
value = read_sysreg(pmccntr_el0);
- else if (armv8pmu_select_counter(idx) == idx)
- value = read_sysreg(pmxevcntr_el0);
+ else
+ value = armv8pmu_read_hw_counter(event);
return value;
}
-static inline void armv8pmu_write_counter(struct perf_event *event, u32 value)
+static inline void armv8pmu_write_evcntr(int idx, u32 value)
+{
+ armv8pmu_select_counter(idx);
+ write_sysreg(value, pmxevcntr_el0);
+}
+
+static inline void armv8pmu_write_hw_counter(struct perf_event *event,
+ u64 value)
+{
+ int idx = event->hw.idx;
+
+ if (armv8pmu_event_is_chained(event)) {
+ armv8pmu_write_evcntr(idx, upper_32_bits(value));
+ armv8pmu_write_evcntr(idx - 1, lower_32_bits(value));
+ } else {
+ armv8pmu_write_evcntr(idx, value);
+ }
+}
+
+static inline void armv8pmu_write_counter(struct perf_event *event, u64 value)
{
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
@@ -541,22 +597,43 @@ static inline void armv8pmu_write_counter(struct perf_event *event, u32 value)
smp_processor_id(), idx);
else if (idx == ARMV8_IDX_CYCLE_COUNTER) {
/*
- * Set the upper 32bits as this is a 64bit counter but we only
- * count using the lower 32bits and we want an interrupt when
- * it overflows.
+ * The cycles counter is really a 64-bit counter.
+ * When treating it as a 32-bit counter, we only count
+ * the lower 32 bits, and set the upper 32-bits so that
+ * we get an interrupt upon 32-bit overflow.
*/
- u64 value64 = 0xffffffff00000000ULL | value;
-
- write_sysreg(value64, pmccntr_el0);
- } else if (armv8pmu_select_counter(idx) == idx)
- write_sysreg(value, pmxevcntr_el0);
+ if (!armv8pmu_event_is_64bit(event))
+ value |= 0xffffffff00000000ULL;
+ write_sysreg(value, pmccntr_el0);
+ } else
+ armv8pmu_write_hw_counter(event, value);
}
static inline void armv8pmu_write_evtype(int idx, u32 val)
{
- if (armv8pmu_select_counter(idx) == idx) {
- val &= ARMV8_PMU_EVTYPE_MASK;
- write_sysreg(val, pmxevtyper_el0);
+ armv8pmu_select_counter(idx);
+ val &= ARMV8_PMU_EVTYPE_MASK;
+ write_sysreg(val, pmxevtyper_el0);
+}
+
+static inline void armv8pmu_write_event_type(struct perf_event *event)
+{
+ struct hw_perf_event *hwc = &event->hw;
+ int idx = hwc->idx;
+
+ /*
+ * For chained events, the low counter is programmed to count
+ * the event of interest and the high counter is programmed
+ * with CHAIN event code with filters set to count at all ELs.
+ */
+ if (armv8pmu_event_is_chained(event)) {
+ u32 chain_evt = ARMV8_PMUV3_PERFCTR_CHAIN |
+ ARMV8_PMU_INCLUDE_EL2;
+
+ armv8pmu_write_evtype(idx - 1, hwc->config_base);
+ armv8pmu_write_evtype(idx, chain_evt);
+ } else {
+ armv8pmu_write_evtype(idx, hwc->config_base);
}
}
@@ -567,6 +644,16 @@ static inline int armv8pmu_enable_counter(int idx)
return idx;
}
+static inline void armv8pmu_enable_event_counter(struct perf_event *event)
+{
+ int idx = event->hw.idx;
+
+ armv8pmu_enable_counter(idx);
+ if (armv8pmu_event_is_chained(event))
+ armv8pmu_enable_counter(idx - 1);
+ isb();
+}
+
static inline int armv8pmu_disable_counter(int idx)
{
u32 counter = ARMV8_IDX_TO_COUNTER(idx);
@@ -574,6 +661,16 @@ static inline int armv8pmu_disable_counter(int idx)
return idx;
}
+static inline void armv8pmu_disable_event_counter(struct perf_event *event)
+{
+ struct hw_perf_event *hwc = &event->hw;
+ int idx = hwc->idx;
+
+ if (armv8pmu_event_is_chained(event))
+ armv8pmu_disable_counter(idx - 1);
+ armv8pmu_disable_counter(idx);
+}
+
static inline int armv8pmu_enable_intens(int idx)
{
u32 counter = ARMV8_IDX_TO_COUNTER(idx);
@@ -581,6 +678,11 @@ static inline int armv8pmu_enable_intens(int idx)
return idx;
}
+static inline int armv8pmu_enable_event_irq(struct perf_event *event)
+{
+ return armv8pmu_enable_intens(event->hw.idx);
+}
+
static inline int armv8pmu_disable_intens(int idx)
{
u32 counter = ARMV8_IDX_TO_COUNTER(idx);
@@ -593,6 +695,11 @@ static inline int armv8pmu_disable_intens(int idx)
return idx;
}
+static inline int armv8pmu_disable_event_irq(struct perf_event *event)
+{
+ return armv8pmu_disable_intens(event->hw.idx);
+}
+
static inline u32 armv8pmu_getreset_flags(void)
{
u32 value;
@@ -610,10 +717,8 @@ static inline u32 armv8pmu_getreset_flags(void)
static void armv8pmu_enable_event(struct perf_event *event)
{
unsigned long flags;
- struct hw_perf_event *hwc = &event->hw;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
- int idx = hwc->idx;
/*
* Enable counter and interrupt, and set the counter to count
@@ -624,22 +729,22 @@ static void armv8pmu_enable_event(struct perf_event *event)
/*
* Disable counter
*/
- armv8pmu_disable_counter(idx);
+ armv8pmu_disable_event_counter(event);
/*
* Set event (if destined for PMNx counters).
*/
- armv8pmu_write_evtype(idx, hwc->config_base);
+ armv8pmu_write_event_type(event);
/*
* Enable interrupt for this counter
*/
- armv8pmu_enable_intens(idx);
+ armv8pmu_enable_event_irq(event);
/*
* Enable counter
*/
- armv8pmu_enable_counter(idx);
+ armv8pmu_enable_event_counter(event);
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
@@ -647,10 +752,8 @@ static void armv8pmu_enable_event(struct perf_event *event)
static void armv8pmu_disable_event(struct perf_event *event)
{
unsigned long flags;
- struct hw_perf_event *hwc = &event->hw;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
- int idx = hwc->idx;
/*
* Disable counter and interrupt
@@ -660,16 +763,38 @@ static void armv8pmu_disable_event(struct perf_event *event)
/*
* Disable counter
*/
- armv8pmu_disable_counter(idx);
+ armv8pmu_disable_event_counter(event);
/*
* Disable interrupt for this counter
*/
- armv8pmu_disable_intens(idx);
+ armv8pmu_disable_event_irq(event);
raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
}
+static void armv8pmu_start(struct arm_pmu *cpu_pmu)
+{
+ unsigned long flags;
+ struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
+
+ raw_spin_lock_irqsave(&events->pmu_lock, flags);
+ /* Enable all counters */
+ armv8pmu_pmcr_write(armv8pmu_pmcr_read() | ARMV8_PMU_PMCR_E);
+ raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
+}
+
+static void armv8pmu_stop(struct arm_pmu *cpu_pmu)
+{
+ unsigned long flags;
+ struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
+
+ raw_spin_lock_irqsave(&events->pmu_lock, flags);
+ /* Disable all counters */
+ armv8pmu_pmcr_write(armv8pmu_pmcr_read() & ~ARMV8_PMU_PMCR_E);
+ raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
+}
+
static irqreturn_t armv8pmu_handle_irq(struct arm_pmu *cpu_pmu)
{
u32 pmovsr;
@@ -694,6 +819,11 @@ static irqreturn_t armv8pmu_handle_irq(struct arm_pmu *cpu_pmu)
*/
regs = get_irq_regs();
+ /*
+ * Stop the PMU while processing the counter overflows
+ * to prevent skews in group events.
+ */
+ armv8pmu_stop(cpu_pmu);
for (idx = 0; idx < cpu_pmu->num_events; ++idx) {
struct perf_event *event = cpuc->events[idx];
struct hw_perf_event *hwc;
@@ -718,6 +848,7 @@ static irqreturn_t armv8pmu_handle_irq(struct arm_pmu *cpu_pmu)
if (perf_event_overflow(event, &data, regs))
cpu_pmu->disable(event);
}
+ armv8pmu_start(cpu_pmu);
/*
* Handle the pending perf events.
@@ -731,32 +862,42 @@ static irqreturn_t armv8pmu_handle_irq(struct arm_pmu *cpu_pmu)
return IRQ_HANDLED;
}
-static void armv8pmu_start(struct arm_pmu *cpu_pmu)
+static int armv8pmu_get_single_idx(struct pmu_hw_events *cpuc,
+ struct arm_pmu *cpu_pmu)
{
- unsigned long flags;
- struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
+ int idx;
- raw_spin_lock_irqsave(&events->pmu_lock, flags);
- /* Enable all counters */
- armv8pmu_pmcr_write(armv8pmu_pmcr_read() | ARMV8_PMU_PMCR_E);
- raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
+ for (idx = ARMV8_IDX_COUNTER0; idx < cpu_pmu->num_events; idx ++) {
+ if (!test_and_set_bit(idx, cpuc->used_mask))
+ return idx;
+ }
+ return -EAGAIN;
}
-static void armv8pmu_stop(struct arm_pmu *cpu_pmu)
+static int armv8pmu_get_chain_idx(struct pmu_hw_events *cpuc,
+ struct arm_pmu *cpu_pmu)
{
- unsigned long flags;
- struct pmu_hw_events *events = this_cpu_ptr(cpu_pmu->hw_events);
+ int idx;
- raw_spin_lock_irqsave(&events->pmu_lock, flags);
- /* Disable all counters */
- armv8pmu_pmcr_write(armv8pmu_pmcr_read() & ~ARMV8_PMU_PMCR_E);
- raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
+ /*
+ * Chaining requires two consecutive event counters, where
+ * the lower idx must be even.
+ */
+ for (idx = ARMV8_IDX_COUNTER0 + 1; idx < cpu_pmu->num_events; idx += 2) {
+ if (!test_and_set_bit(idx, cpuc->used_mask)) {
+ /* Check if the preceding even counter is available */
+ if (!test_and_set_bit(idx - 1, cpuc->used_mask))
+ return idx;
+ /* Release the Odd counter */
+ clear_bit(idx, cpuc->used_mask);
+ }
+ }
+ return -EAGAIN;
}
static int armv8pmu_get_event_idx(struct pmu_hw_events *cpuc,
struct perf_event *event)
{
- int idx;
struct arm_pmu *cpu_pmu = to_arm_pmu(event->pmu);
struct hw_perf_event *hwc = &event->hw;
unsigned long evtype = hwc->config_base & ARMV8_PMU_EVTYPE_EVENT;
@@ -770,13 +911,20 @@ static int armv8pmu_get_event_idx(struct pmu_hw_events *cpuc,
/*
* Otherwise use events counters
*/
- for (idx = ARMV8_IDX_COUNTER0; idx < cpu_pmu->num_events; ++idx) {
- if (!test_and_set_bit(idx, cpuc->used_mask))
- return idx;
- }
+ if (armv8pmu_event_is_64bit(event))
+ return armv8pmu_get_chain_idx(cpuc, cpu_pmu);
+ else
+ return armv8pmu_get_single_idx(cpuc, cpu_pmu);
+}
- /* The counters are all in use. */
- return -EAGAIN;
+static void armv8pmu_clear_event_idx(struct pmu_hw_events *cpuc,
+ struct perf_event *event)
+{
+ int idx = event->hw.idx;
+
+ clear_bit(idx, cpuc->used_mask);
+ if (armv8pmu_event_is_chained(event))
+ clear_bit(idx - 1, cpuc->used_mask);
}
/*
@@ -851,6 +999,9 @@ static int __armv8_pmuv3_map_event(struct perf_event *event,
&armv8_pmuv3_perf_cache_map,
ARMV8_PMU_EVTYPE_EVENT);
+ if (armv8pmu_event_is_64bit(event))
+ event->hw.flags |= ARMPMU_EVT_64BIT;
+
/* Onl expose micro/arch events supported by this PMU */
if ((hw_event_id > 0) && (hw_event_id < ARMV8_PMUV3_MAX_COMMON_EVENTS)
&& test_bit(hw_event_id, armpmu->pmceid_bitmap)) {
@@ -957,10 +1108,10 @@ static int armv8_pmu_init(struct arm_pmu *cpu_pmu)
cpu_pmu->read_counter = armv8pmu_read_counter,
cpu_pmu->write_counter = armv8pmu_write_counter,
cpu_pmu->get_event_idx = armv8pmu_get_event_idx,
+ cpu_pmu->clear_event_idx = armv8pmu_clear_event_idx,
cpu_pmu->start = armv8pmu_start,
cpu_pmu->stop = armv8pmu_stop,
cpu_pmu->reset = armv8pmu_reset,
- cpu_pmu->max_period = (1LLU << 32) - 1,
cpu_pmu->set_event_filter = armv8pmu_set_event_filter;
return 0;
diff --git a/drivers/perf/arm-cci.c b/drivers/perf/arm-cci.c
index 0d09d8e..1bfeb16 100644
--- a/drivers/perf/arm-cci.c
+++ b/drivers/perf/arm-cci.c
@@ -53,6 +53,16 @@ enum {
CCI_IF_MAX,
};
+#define NUM_HW_CNTRS_CII_4XX 4
+#define NUM_HW_CNTRS_CII_5XX 8
+#define NUM_HW_CNTRS_MAX NUM_HW_CNTRS_CII_5XX
+
+#define FIXED_HW_CNTRS_CII_4XX 1
+#define FIXED_HW_CNTRS_CII_5XX 0
+#define FIXED_HW_CNTRS_MAX FIXED_HW_CNTRS_CII_4XX
+
+#define HW_CNTRS_MAX (NUM_HW_CNTRS_MAX + FIXED_HW_CNTRS_MAX)
+
struct event_range {
u32 min;
u32 max;
@@ -633,8 +643,7 @@ static void cci_pmu_sync_counters(struct cci_pmu *cci_pmu)
{
int i;
struct cci_pmu_hw_events *cci_hw = &cci_pmu->hw_events;
-
- DECLARE_BITMAP(mask, cci_pmu->num_cntrs);
+ DECLARE_BITMAP(mask, HW_CNTRS_MAX);
bitmap_zero(mask, cci_pmu->num_cntrs);
for_each_set_bit(i, cci_pmu->hw_events.used_mask, cci_pmu->num_cntrs) {
@@ -940,7 +949,7 @@ static void pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
static void cci5xx_pmu_write_counters(struct cci_pmu *cci_pmu, unsigned long *mask)
{
int i;
- DECLARE_BITMAP(saved_mask, cci_pmu->num_cntrs);
+ DECLARE_BITMAP(saved_mask, HW_CNTRS_MAX);
bitmap_zero(saved_mask, cci_pmu->num_cntrs);
pmu_save_counters(cci_pmu, saved_mask);
@@ -1245,7 +1254,7 @@ static int validate_group(struct perf_event *event)
{
struct perf_event *sibling, *leader = event->group_leader;
struct cci_pmu *cci_pmu = to_cci_pmu(event->pmu);
- unsigned long mask[BITS_TO_LONGS(cci_pmu->num_cntrs)];
+ unsigned long mask[BITS_TO_LONGS(HW_CNTRS_MAX)];
struct cci_pmu_hw_events fake_pmu = {
/*
* Initialise the fake PMU. We only need to populate the
@@ -1403,6 +1412,11 @@ static int cci_pmu_init(struct cci_pmu *cci_pmu, struct platform_device *pdev)
char *name = model->name;
u32 num_cntrs;
+ if (WARN_ON(model->num_hw_cntrs > NUM_HW_CNTRS_MAX))
+ return -EINVAL;
+ if (WARN_ON(model->fixed_hw_cntrs > FIXED_HW_CNTRS_MAX))
+ return -EINVAL;
+
pmu_event_attr_group.attrs = model->event_attrs;
pmu_format_attr_group.attrs = model->format_attrs;
@@ -1455,8 +1469,8 @@ static __maybe_unused struct cci_pmu_model cci_pmu_models[] = {
#ifdef CONFIG_ARM_CCI400_PMU
[CCI400_R0] = {
.name = "CCI_400",
- .fixed_hw_cntrs = 1, /* Cycle counter */
- .num_hw_cntrs = 4,
+ .fixed_hw_cntrs = FIXED_HW_CNTRS_CII_4XX, /* Cycle counter */
+ .num_hw_cntrs = NUM_HW_CNTRS_CII_4XX,
.cntr_size = SZ_4K,
.format_attrs = cci400_pmu_format_attrs,
.event_attrs = cci400_r0_pmu_event_attrs,
@@ -1475,8 +1489,8 @@ static __maybe_unused struct cci_pmu_model cci_pmu_models[] = {
},
[CCI400_R1] = {
.name = "CCI_400_r1",
- .fixed_hw_cntrs = 1, /* Cycle counter */
- .num_hw_cntrs = 4,
+ .fixed_hw_cntrs = FIXED_HW_CNTRS_CII_4XX, /* Cycle counter */
+ .num_hw_cntrs = NUM_HW_CNTRS_CII_4XX,
.cntr_size = SZ_4K,
.format_attrs = cci400_pmu_format_attrs,
.event_attrs = cci400_r1_pmu_event_attrs,
@@ -1497,8 +1511,8 @@ static __maybe_unused struct cci_pmu_model cci_pmu_models[] = {
#ifdef CONFIG_ARM_CCI5xx_PMU
[CCI500_R0] = {
.name = "CCI_500",
- .fixed_hw_cntrs = 0,
- .num_hw_cntrs = 8,
+ .fixed_hw_cntrs = FIXED_HW_CNTRS_CII_5XX,
+ .num_hw_cntrs = NUM_HW_CNTRS_CII_5XX,
.cntr_size = SZ_64K,
.format_attrs = cci5xx_pmu_format_attrs,
.event_attrs = cci5xx_pmu_event_attrs,
@@ -1521,8 +1535,8 @@ static __maybe_unused struct cci_pmu_model cci_pmu_models[] = {
},
[CCI550_R0] = {
.name = "CCI_550",
- .fixed_hw_cntrs = 0,
- .num_hw_cntrs = 8,
+ .fixed_hw_cntrs = FIXED_HW_CNTRS_CII_5XX,
+ .num_hw_cntrs = NUM_HW_CNTRS_CII_5XX,
.cntr_size = SZ_64K,
.format_attrs = cci5xx_pmu_format_attrs,
.event_attrs = cci5xx_pmu_event_attrs,
diff --git a/drivers/perf/arm-ccn.c b/drivers/perf/arm-ccn.c
index b416ee1..4b15c36 100644
--- a/drivers/perf/arm-ccn.c
+++ b/drivers/perf/arm-ccn.c
@@ -1485,17 +1485,9 @@ static int arm_ccn_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, ccn);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
- if (!res)
- return -EINVAL;
-
- if (!devm_request_mem_region(ccn->dev, res->start,
- resource_size(res), pdev->name))
- return -EBUSY;
-
- ccn->base = devm_ioremap(ccn->dev, res->start,
- resource_size(res));
- if (!ccn->base)
- return -EFAULT;
+ ccn->base = devm_ioremap_resource(ccn->dev, res);
+ if (IS_ERR(ccn->base))
+ return PTR_ERR(ccn->base);
res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
if (!res)
diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index a6347d4..7f01f6f 100644
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -28,6 +28,14 @@
static DEFINE_PER_CPU(struct arm_pmu *, cpu_armpmu);
static DEFINE_PER_CPU(int, cpu_irq);
+static inline u64 arm_pmu_event_max_period(struct perf_event *event)
+{
+ if (event->hw.flags & ARMPMU_EVT_64BIT)
+ return GENMASK_ULL(63, 0);
+ else
+ return GENMASK_ULL(31, 0);
+}
+
static int
armpmu_map_cache_event(const unsigned (*cache_map)
[PERF_COUNT_HW_CACHE_MAX]
@@ -114,8 +122,10 @@ int armpmu_event_set_period(struct perf_event *event)
struct hw_perf_event *hwc = &event->hw;
s64 left = local64_read(&hwc->period_left);
s64 period = hwc->sample_period;
+ u64 max_period;
int ret = 0;
+ max_period = arm_pmu_event_max_period(event);
if (unlikely(left <= -period)) {
left = period;
local64_set(&hwc->period_left, left);
@@ -136,12 +146,12 @@ int armpmu_event_set_period(struct perf_event *event)
* 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;
+ if (left > (max_period >> 1))
+ left = (max_period >> 1);
local64_set(&hwc->prev_count, (u64)-left);
- armpmu->write_counter(event, (u64)(-left) & 0xffffffff);
+ armpmu->write_counter(event, (u64)(-left) & max_period);
perf_event_update_userpage(event);
@@ -153,6 +163,7 @@ 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;
+ u64 max_period = arm_pmu_event_max_period(event);
again:
prev_raw_count = local64_read(&hwc->prev_count);
@@ -162,7 +173,7 @@ u64 armpmu_event_update(struct perf_event *event)
new_raw_count) != prev_raw_count)
goto again;
- delta = (new_raw_count - prev_raw_count) & armpmu->max_period;
+ delta = (new_raw_count - prev_raw_count) & max_period;
local64_add(delta, &event->count);
local64_sub(delta, &hwc->period_left);
@@ -227,11 +238,10 @@ armpmu_del(struct perf_event *event, int flags)
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);
-
+ armpmu->clear_event_idx(hw_events, event);
perf_event_update_userpage(event);
+ /* Clear the allocated counter */
+ hwc->idx = -1;
}
static int
@@ -360,6 +370,7 @@ __hw_perf_event_init(struct perf_event *event)
struct hw_perf_event *hwc = &event->hw;
int mapping;
+ hwc->flags = 0;
mapping = armpmu->map_event(event);
if (mapping < 0) {
@@ -402,7 +413,7 @@ __hw_perf_event_init(struct perf_event *event)
* 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->sample_period = arm_pmu_event_max_period(event) >> 1;
hwc->last_period = hwc->sample_period;
local64_set(&hwc->period_left, hwc->sample_period);
}
@@ -654,14 +665,9 @@ static void cpu_pm_pmu_setup(struct arm_pmu *armpmu, unsigned long cmd)
int idx;
for (idx = 0; idx < armpmu->num_events; idx++) {
- /*
- * If the counter is not used skip it, there is no
- * need of stopping/restarting it.
- */
- if (!test_bit(idx, hw_events->used_mask))
- continue;
-
event = hw_events->events[idx];
+ if (!event)
+ continue;
switch (cmd) {
case CPU_PM_ENTER:
diff --git a/drivers/perf/arm_pmu_platform.c b/drivers/perf/arm_pmu_platform.c
index 971ff336..96075ce 100644
--- a/drivers/perf/arm_pmu_platform.c
+++ b/drivers/perf/arm_pmu_platform.c
@@ -160,7 +160,7 @@ static int pmu_parse_irqs(struct arm_pmu *pmu)
static int armpmu_request_irqs(struct arm_pmu *armpmu)
{
struct pmu_hw_events __percpu *hw_events = armpmu->hw_events;
- int cpu, err;
+ int cpu, err = 0;
for_each_cpu(cpu, &armpmu->supported_cpus) {
int irq = per_cpu(hw_events->irq, cpu);
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
index 44df613..9efd241 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -350,19 +350,21 @@ void hisi_uncore_pmu_disable(struct pmu *pmu)
/*
* Read Super CPU cluster and CPU cluster ID from MPIDR_EL1.
- * If multi-threading is supported, SCCL_ID is in MPIDR[aff3] and CCL_ID
- * is in MPIDR[aff2]; if not, SCCL_ID is in MPIDR[aff2] and CCL_ID is
- * in MPIDR[aff1]. If this changes in future, this shall be updated.
+ * If multi-threading is supported, CCL_ID is the low 3-bits in MPIDR[Aff2]
+ * and SCCL_ID is the upper 5-bits of Aff2 field; if not, SCCL_ID
+ * is in MPIDR[Aff2] and CCL_ID is in MPIDR[Aff1].
*/
static void hisi_read_sccl_and_ccl_id(int *sccl_id, int *ccl_id)
{
u64 mpidr = read_cpuid_mpidr();
if (mpidr & MPIDR_MT_BITMASK) {
+ int aff2 = MPIDR_AFFINITY_LEVEL(mpidr, 2);
+
if (sccl_id)
- *sccl_id = MPIDR_AFFINITY_LEVEL(mpidr, 3);
+ *sccl_id = aff2 >> 3;
if (ccl_id)
- *ccl_id = MPIDR_AFFINITY_LEVEL(mpidr, 2);
+ *ccl_id = aff2 & 0x7;
} else {
if (sccl_id)
*sccl_id = MPIDR_AFFINITY_LEVEL(mpidr, 2);
diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h
index ad54444..10f92e1 100644
--- a/include/linux/perf/arm_pmu.h
+++ b/include/linux/perf/arm_pmu.h
@@ -25,6 +25,12 @@
*/
#define ARMPMU_MAX_HWEVENTS 32
+/*
+ * ARM PMU hw_event flags
+ */
+/* Event uses a 64bit counter */
+#define ARMPMU_EVT_64BIT 1
+
#define HW_OP_UNSUPPORTED 0xFFFF
#define C(_x) PERF_COUNT_HW_CACHE_##_x
#define CACHE_OP_UNSUPPORTED 0xFFFF
@@ -87,14 +93,13 @@ struct arm_pmu {
struct perf_event *event);
int (*set_event_filter)(struct hw_perf_event *evt,
struct perf_event_attr *attr);
- u32 (*read_counter)(struct perf_event *event);
- void (*write_counter)(struct perf_event *event, u32 val);
+ u64 (*read_counter)(struct perf_event *event);
+ void (*write_counter)(struct perf_event *event, u64 val);
void (*start)(struct arm_pmu *);
void (*stop)(struct arm_pmu *);
void (*reset)(void *);
int (*map_event)(struct perf_event *event);
int num_events;
- u64 max_period;
bool secure_access; /* 32-bit ARM only */
#define ARMV8_PMUV3_MAX_COMMON_EVENTS 0x40
DECLARE_BITMAP(pmceid_bitmap, ARMV8_PMUV3_MAX_COMMON_EVENTS);