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-rw-r--r--drivers/perf/Kconfig15
-rw-r--r--drivers/perf/Makefile2
-rw-r--r--drivers/perf/arm_pmu.c10
-rw-r--r--drivers/perf/arm_pmu_acpi.c3
-rw-r--r--drivers/perf/arm_pmu_platform.c4
-rw-r--r--drivers/perf/arm_spe_pmu.c1249
-rw-r--r--drivers/perf/hisilicon/Makefile1
-rw-r--r--drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c463
-rw-r--r--drivers/perf/hisilicon/hisi_uncore_hha_pmu.c473
-rw-r--r--drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c463
-rw-r--r--drivers/perf/hisilicon/hisi_uncore_pmu.c447
-rw-r--r--drivers/perf/hisilicon/hisi_uncore_pmu.h102
-rw-r--r--drivers/perf/qcom_l2_pmu.c54
13 files changed, 3276 insertions, 10 deletions
diff --git a/drivers/perf/Kconfig b/drivers/perf/Kconfig
index e5197ffb7422..b8f44b068fc6 100644
--- a/drivers/perf/Kconfig
+++ b/drivers/perf/Kconfig
@@ -17,6 +17,13 @@ config ARM_PMU_ACPI
depends on ARM_PMU && ACPI
def_bool y
+config HISI_PMU
+ bool "HiSilicon SoC PMU"
+ depends on ARM64 && ACPI
+ help
+ Support for HiSilicon SoC uncore performance monitoring
+ unit (PMU), such as: L3C, HHA and DDRC.
+
config QCOM_L2_PMU
bool "Qualcomm Technologies L2-cache PMU"
depends on ARCH_QCOM && ARM64 && ACPI
@@ -43,4 +50,12 @@ config XGENE_PMU
help
Say y if you want to use APM X-Gene SoC performance monitors.
+config ARM_SPE_PMU
+ tristate "Enable support for the ARMv8.2 Statistical Profiling Extension"
+ depends on PERF_EVENTS && ARM64
+ help
+ Enable perf support for the ARMv8.2 Statistical Profiling
+ Extension, which provides periodic sampling of operations in
+ the CPU pipeline and reports this via the perf AUX interface.
+
endmenu
diff --git a/drivers/perf/Makefile b/drivers/perf/Makefile
index 9402dc8ff22c..710a0135bd61 100644
--- a/drivers/perf/Makefile
+++ b/drivers/perf/Makefile
@@ -1,6 +1,8 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_ARM_PMU) += arm_pmu.o arm_pmu_platform.o
obj-$(CONFIG_ARM_PMU_ACPI) += arm_pmu_acpi.o
+obj-$(CONFIG_HISI_PMU) += hisilicon/
obj-$(CONFIG_QCOM_L2_PMU) += qcom_l2_pmu.o
obj-$(CONFIG_QCOM_L3_PMU) += qcom_l3_pmu.o
obj-$(CONFIG_XGENE_PMU) += xgene_pmu.o
+obj-$(CONFIG_ARM_SPE_PMU) += arm_spe_pmu.o
diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index d14fc2e67f93..7bc5eee96b31 100644
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -539,7 +539,7 @@ void armpmu_free_irq(struct arm_pmu *armpmu, int cpu)
if (!cpumask_test_and_clear_cpu(cpu, &armpmu->active_irqs))
return;
- if (irq_is_percpu(irq)) {
+ if (irq_is_percpu_devid(irq)) {
free_percpu_irq(irq, &hw_events->percpu_pmu);
cpumask_clear(&armpmu->active_irqs);
return;
@@ -565,10 +565,10 @@ int armpmu_request_irq(struct arm_pmu *armpmu, int cpu)
if (!irq)
return 0;
- if (irq_is_percpu(irq) && cpumask_empty(&armpmu->active_irqs)) {
+ if (irq_is_percpu_devid(irq) && cpumask_empty(&armpmu->active_irqs)) {
err = request_percpu_irq(irq, handler, "arm-pmu",
&hw_events->percpu_pmu);
- } else if (irq_is_percpu(irq)) {
+ } else if (irq_is_percpu_devid(irq)) {
int other_cpu = cpumask_first(&armpmu->active_irqs);
int other_irq = per_cpu(hw_events->irq, other_cpu);
@@ -649,7 +649,7 @@ static int arm_perf_starting_cpu(unsigned int cpu, struct hlist_node *node)
irq = armpmu_get_cpu_irq(pmu, cpu);
if (irq) {
- if (irq_is_percpu(irq)) {
+ if (irq_is_percpu_devid(irq)) {
enable_percpu_irq(irq, IRQ_TYPE_NONE);
return 0;
}
@@ -667,7 +667,7 @@ static int arm_perf_teardown_cpu(unsigned int cpu, struct hlist_node *node)
return 0;
irq = armpmu_get_cpu_irq(pmu, cpu);
- if (irq && irq_is_percpu(irq))
+ if (irq && irq_is_percpu_devid(irq))
disable_percpu_irq(irq);
return 0;
diff --git a/drivers/perf/arm_pmu_acpi.c b/drivers/perf/arm_pmu_acpi.c
index 3303dd8d8eb5..705f1a390e31 100644
--- a/drivers/perf/arm_pmu_acpi.c
+++ b/drivers/perf/arm_pmu_acpi.c
@@ -193,9 +193,6 @@ int arm_pmu_acpi_probe(armpmu_init_fn init_fn)
int pmu_idx = 0;
int cpu, ret;
- if (acpi_disabled)
- return 0;
-
/*
* Initialise and register the set of PMUs which we know about right
* now. Ideally we'd do this in arm_pmu_acpi_cpu_starting() so that we
diff --git a/drivers/perf/arm_pmu_platform.c b/drivers/perf/arm_pmu_platform.c
index 4428852e1da1..91b224eced18 100644
--- a/drivers/perf/arm_pmu_platform.c
+++ b/drivers/perf/arm_pmu_platform.c
@@ -127,7 +127,7 @@ static int pmu_parse_irqs(struct arm_pmu *pmu)
if (num_irqs == 1) {
int irq = platform_get_irq(pdev, 0);
- if (irq && irq_is_percpu(irq))
+ if (irq && irq_is_percpu_devid(irq))
return pmu_parse_percpu_irq(pmu, irq);
}
@@ -150,7 +150,7 @@ static int pmu_parse_irqs(struct arm_pmu *pmu)
if (WARN_ON(irq <= 0))
continue;
- if (irq_is_percpu(irq)) {
+ if (irq_is_percpu_devid(irq)) {
pr_warn("multiple PPIs or mismatched SPI/PPI detected\n");
return -EINVAL;
}
diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
new file mode 100644
index 000000000000..8ce262fc2561
--- /dev/null
+++ b/drivers/perf/arm_spe_pmu.c
@@ -0,0 +1,1249 @@
+/*
+ * Perf support for the Statistical Profiling Extension, introduced as
+ * part of ARMv8.2.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright (C) 2016 ARM Limited
+ *
+ * Author: Will Deacon <will.deacon@arm.com>
+ */
+
+#define PMUNAME "arm_spe"
+#define DRVNAME PMUNAME "_pmu"
+#define pr_fmt(fmt) DRVNAME ": " fmt
+
+#include <linux/cpuhotplug.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/perf_event.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <asm/sysreg.h>
+
+#define ARM_SPE_BUF_PAD_BYTE 0
+
+struct arm_spe_pmu_buf {
+ int nr_pages;
+ bool snapshot;
+ void *base;
+};
+
+struct arm_spe_pmu {
+ struct pmu pmu;
+ struct platform_device *pdev;
+ cpumask_t supported_cpus;
+ struct hlist_node hotplug_node;
+
+ int irq; /* PPI */
+
+ u16 min_period;
+ u16 counter_sz;
+
+#define SPE_PMU_FEAT_FILT_EVT (1UL << 0)
+#define SPE_PMU_FEAT_FILT_TYP (1UL << 1)
+#define SPE_PMU_FEAT_FILT_LAT (1UL << 2)
+#define SPE_PMU_FEAT_ARCH_INST (1UL << 3)
+#define SPE_PMU_FEAT_LDS (1UL << 4)
+#define SPE_PMU_FEAT_ERND (1UL << 5)
+#define SPE_PMU_FEAT_DEV_PROBED (1UL << 63)
+ u64 features;
+
+ u16 max_record_sz;
+ u16 align;
+ struct perf_output_handle __percpu *handle;
+};
+
+#define to_spe_pmu(p) (container_of(p, struct arm_spe_pmu, pmu))
+
+/* Convert a free-running index from perf into an SPE buffer offset */
+#define PERF_IDX2OFF(idx, buf) ((idx) % ((buf)->nr_pages << PAGE_SHIFT))
+
+/* Keep track of our dynamic hotplug state */
+static enum cpuhp_state arm_spe_pmu_online;
+
+enum arm_spe_pmu_buf_fault_action {
+ SPE_PMU_BUF_FAULT_ACT_SPURIOUS,
+ SPE_PMU_BUF_FAULT_ACT_FATAL,
+ SPE_PMU_BUF_FAULT_ACT_OK,
+};
+
+/* This sysfs gunk was really good fun to write. */
+enum arm_spe_pmu_capabilities {
+ SPE_PMU_CAP_ARCH_INST = 0,
+ SPE_PMU_CAP_ERND,
+ SPE_PMU_CAP_FEAT_MAX,
+ SPE_PMU_CAP_CNT_SZ = SPE_PMU_CAP_FEAT_MAX,
+ SPE_PMU_CAP_MIN_IVAL,
+};
+
+static int arm_spe_pmu_feat_caps[SPE_PMU_CAP_FEAT_MAX] = {
+ [SPE_PMU_CAP_ARCH_INST] = SPE_PMU_FEAT_ARCH_INST,
+ [SPE_PMU_CAP_ERND] = SPE_PMU_FEAT_ERND,
+};
+
+static u32 arm_spe_pmu_cap_get(struct arm_spe_pmu *spe_pmu, int cap)
+{
+ if (cap < SPE_PMU_CAP_FEAT_MAX)
+ return !!(spe_pmu->features & arm_spe_pmu_feat_caps[cap]);
+
+ switch (cap) {
+ case SPE_PMU_CAP_CNT_SZ:
+ return spe_pmu->counter_sz;
+ case SPE_PMU_CAP_MIN_IVAL:
+ return spe_pmu->min_period;
+ default:
+ WARN(1, "unknown cap %d\n", cap);
+ }
+
+ return 0;
+}
+
+static ssize_t arm_spe_pmu_cap_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct arm_spe_pmu *spe_pmu = platform_get_drvdata(pdev);
+ struct dev_ext_attribute *ea =
+ container_of(attr, struct dev_ext_attribute, attr);
+ int cap = (long)ea->var;
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ arm_spe_pmu_cap_get(spe_pmu, cap));
+}
+
+#define SPE_EXT_ATTR_ENTRY(_name, _func, _var) \
+ &((struct dev_ext_attribute[]) { \
+ { __ATTR(_name, S_IRUGO, _func, NULL), (void *)_var } \
+ })[0].attr.attr
+
+#define SPE_CAP_EXT_ATTR_ENTRY(_name, _var) \
+ SPE_EXT_ATTR_ENTRY(_name, arm_spe_pmu_cap_show, _var)
+
+static struct attribute *arm_spe_pmu_cap_attr[] = {
+ SPE_CAP_EXT_ATTR_ENTRY(arch_inst, SPE_PMU_CAP_ARCH_INST),
+ SPE_CAP_EXT_ATTR_ENTRY(ernd, SPE_PMU_CAP_ERND),
+ SPE_CAP_EXT_ATTR_ENTRY(count_size, SPE_PMU_CAP_CNT_SZ),
+ SPE_CAP_EXT_ATTR_ENTRY(min_interval, SPE_PMU_CAP_MIN_IVAL),
+ NULL,
+};
+
+static struct attribute_group arm_spe_pmu_cap_group = {
+ .name = "caps",
+ .attrs = arm_spe_pmu_cap_attr,
+};
+
+/* User ABI */
+#define ATTR_CFG_FLD_ts_enable_CFG config /* PMSCR_EL1.TS */
+#define ATTR_CFG_FLD_ts_enable_LO 0
+#define ATTR_CFG_FLD_ts_enable_HI 0
+#define ATTR_CFG_FLD_pa_enable_CFG config /* PMSCR_EL1.PA */
+#define ATTR_CFG_FLD_pa_enable_LO 1
+#define ATTR_CFG_FLD_pa_enable_HI 1
+#define ATTR_CFG_FLD_pct_enable_CFG config /* PMSCR_EL1.PCT */
+#define ATTR_CFG_FLD_pct_enable_LO 2
+#define ATTR_CFG_FLD_pct_enable_HI 2
+#define ATTR_CFG_FLD_jitter_CFG config /* PMSIRR_EL1.RND */
+#define ATTR_CFG_FLD_jitter_LO 16
+#define ATTR_CFG_FLD_jitter_HI 16
+#define ATTR_CFG_FLD_branch_filter_CFG config /* PMSFCR_EL1.B */
+#define ATTR_CFG_FLD_branch_filter_LO 32
+#define ATTR_CFG_FLD_branch_filter_HI 32
+#define ATTR_CFG_FLD_load_filter_CFG config /* PMSFCR_EL1.LD */
+#define ATTR_CFG_FLD_load_filter_LO 33
+#define ATTR_CFG_FLD_load_filter_HI 33
+#define ATTR_CFG_FLD_store_filter_CFG config /* PMSFCR_EL1.ST */
+#define ATTR_CFG_FLD_store_filter_LO 34
+#define ATTR_CFG_FLD_store_filter_HI 34
+
+#define ATTR_CFG_FLD_event_filter_CFG config1 /* PMSEVFR_EL1 */
+#define ATTR_CFG_FLD_event_filter_LO 0
+#define ATTR_CFG_FLD_event_filter_HI 63
+
+#define ATTR_CFG_FLD_min_latency_CFG config2 /* PMSLATFR_EL1.MINLAT */
+#define ATTR_CFG_FLD_min_latency_LO 0
+#define ATTR_CFG_FLD_min_latency_HI 11
+
+/* Why does everything I do descend into this? */
+#define __GEN_PMU_FORMAT_ATTR(cfg, lo, hi) \
+ (lo) == (hi) ? #cfg ":" #lo "\n" : #cfg ":" #lo "-" #hi
+
+#define _GEN_PMU_FORMAT_ATTR(cfg, lo, hi) \
+ __GEN_PMU_FORMAT_ATTR(cfg, lo, hi)
+
+#define GEN_PMU_FORMAT_ATTR(name) \
+ PMU_FORMAT_ATTR(name, \
+ _GEN_PMU_FORMAT_ATTR(ATTR_CFG_FLD_##name##_CFG, \
+ ATTR_CFG_FLD_##name##_LO, \
+ ATTR_CFG_FLD_##name##_HI))
+
+#define _ATTR_CFG_GET_FLD(attr, cfg, lo, hi) \
+ ((((attr)->cfg) >> lo) & GENMASK(hi - lo, 0))
+
+#define ATTR_CFG_GET_FLD(attr, name) \
+ _ATTR_CFG_GET_FLD(attr, \
+ ATTR_CFG_FLD_##name##_CFG, \
+ ATTR_CFG_FLD_##name##_LO, \
+ ATTR_CFG_FLD_##name##_HI)
+
+GEN_PMU_FORMAT_ATTR(ts_enable);
+GEN_PMU_FORMAT_ATTR(pa_enable);
+GEN_PMU_FORMAT_ATTR(pct_enable);
+GEN_PMU_FORMAT_ATTR(jitter);
+GEN_PMU_FORMAT_ATTR(branch_filter);
+GEN_PMU_FORMAT_ATTR(load_filter);
+GEN_PMU_FORMAT_ATTR(store_filter);
+GEN_PMU_FORMAT_ATTR(event_filter);
+GEN_PMU_FORMAT_ATTR(min_latency);
+
+static struct attribute *arm_spe_pmu_formats_attr[] = {
+ &format_attr_ts_enable.attr,
+ &format_attr_pa_enable.attr,
+ &format_attr_pct_enable.attr,
+ &format_attr_jitter.attr,
+ &format_attr_branch_filter.attr,
+ &format_attr_load_filter.attr,
+ &format_attr_store_filter.attr,
+ &format_attr_event_filter.attr,
+ &format_attr_min_latency.attr,
+ NULL,
+};
+
+static struct attribute_group arm_spe_pmu_format_group = {
+ .name = "format",
+ .attrs = arm_spe_pmu_formats_attr,
+};
+
+static ssize_t arm_spe_pmu_get_attr_cpumask(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct arm_spe_pmu *spe_pmu = platform_get_drvdata(pdev);
+
+ return cpumap_print_to_pagebuf(true, buf, &spe_pmu->supported_cpus);
+}
+static DEVICE_ATTR(cpumask, S_IRUGO, arm_spe_pmu_get_attr_cpumask, NULL);
+
+static struct attribute *arm_spe_pmu_attrs[] = {
+ &dev_attr_cpumask.attr,
+ NULL,
+};
+
+static struct attribute_group arm_spe_pmu_group = {
+ .attrs = arm_spe_pmu_attrs,
+};
+
+static const struct attribute_group *arm_spe_pmu_attr_groups[] = {
+ &arm_spe_pmu_group,
+ &arm_spe_pmu_cap_group,
+ &arm_spe_pmu_format_group,
+ NULL,
+};
+
+/* Convert between user ABI and register values */
+static u64 arm_spe_event_to_pmscr(struct perf_event *event)
+{
+ struct perf_event_attr *attr = &event->attr;
+ u64 reg = 0;
+
+ reg |= ATTR_CFG_GET_FLD(attr, ts_enable) << SYS_PMSCR_EL1_TS_SHIFT;
+ reg |= ATTR_CFG_GET_FLD(attr, pa_enable) << SYS_PMSCR_EL1_PA_SHIFT;
+ reg |= ATTR_CFG_GET_FLD(attr, pct_enable) << SYS_PMSCR_EL1_PCT_SHIFT;
+
+ if (!attr->exclude_user)
+ reg |= BIT(SYS_PMSCR_EL1_E0SPE_SHIFT);
+
+ if (!attr->exclude_kernel)
+ reg |= BIT(SYS_PMSCR_EL1_E1SPE_SHIFT);
+
+ if (IS_ENABLED(CONFIG_PID_IN_CONTEXTIDR) && capable(CAP_SYS_ADMIN))
+ reg |= BIT(SYS_PMSCR_EL1_CX_SHIFT);
+
+ return reg;
+}
+
+static void arm_spe_event_sanitise_period(struct perf_event *event)
+{
+ struct arm_spe_pmu *spe_pmu = to_spe_pmu(event->pmu);
+ u64 period = event->hw.sample_period;
+ u64 max_period = SYS_PMSIRR_EL1_INTERVAL_MASK
+ << SYS_PMSIRR_EL1_INTERVAL_SHIFT;
+
+ if (period < spe_pmu->min_period)
+ period = spe_pmu->min_period;
+ else if (period > max_period)
+ period = max_period;
+ else
+ period &= max_period;
+
+ event->hw.sample_period = period;
+}
+
+static u64 arm_spe_event_to_pmsirr(struct perf_event *event)
+{
+ struct perf_event_attr *attr = &event->attr;
+ u64 reg = 0;
+
+ arm_spe_event_sanitise_period(event);
+
+ reg |= ATTR_CFG_GET_FLD(attr, jitter) << SYS_PMSIRR_EL1_RND_SHIFT;
+ reg |= event->hw.sample_period;
+
+ return reg;
+}
+
+static u64 arm_spe_event_to_pmsfcr(struct perf_event *event)
+{
+ struct perf_event_attr *attr = &event->attr;
+ u64 reg = 0;
+
+ reg |= ATTR_CFG_GET_FLD(attr, load_filter) << SYS_PMSFCR_EL1_LD_SHIFT;
+ reg |= ATTR_CFG_GET_FLD(attr, store_filter) << SYS_PMSFCR_EL1_ST_SHIFT;
+ reg |= ATTR_CFG_GET_FLD(attr, branch_filter) << SYS_PMSFCR_EL1_B_SHIFT;
+
+ if (reg)
+ reg |= BIT(SYS_PMSFCR_EL1_FT_SHIFT);
+
+ if (ATTR_CFG_GET_FLD(attr, event_filter))
+ reg |= BIT(SYS_PMSFCR_EL1_FE_SHIFT);
+
+ if (ATTR_CFG_GET_FLD(attr, min_latency))
+ reg |= BIT(SYS_PMSFCR_EL1_FL_SHIFT);
+
+ return reg;
+}
+
+static u64 arm_spe_event_to_pmsevfr(struct perf_event *event)
+{
+ struct perf_event_attr *attr = &event->attr;
+ return ATTR_CFG_GET_FLD(attr, event_filter);
+}
+
+static u64 arm_spe_event_to_pmslatfr(struct perf_event *event)
+{
+ struct perf_event_attr *attr = &event->attr;
+ return ATTR_CFG_GET_FLD(attr, min_latency)
+ << SYS_PMSLATFR_EL1_MINLAT_SHIFT;
+}
+
+static void arm_spe_pmu_pad_buf(struct perf_output_handle *handle, int len)
+{
+ struct arm_spe_pmu_buf *buf = perf_get_aux(handle);
+ u64 head = PERF_IDX2OFF(handle->head, buf);
+
+ memset(buf->base + head, ARM_SPE_BUF_PAD_BYTE, len);
+ if (!buf->snapshot)
+ perf_aux_output_skip(handle, len);
+}
+
+static u64 arm_spe_pmu_next_snapshot_off(struct perf_output_handle *handle)
+{
+ struct arm_spe_pmu_buf *buf = perf_get_aux(handle);
+ struct arm_spe_pmu *spe_pmu = to_spe_pmu(handle->event->pmu);
+ u64 head = PERF_IDX2OFF(handle->head, buf);
+ u64 limit = buf->nr_pages * PAGE_SIZE;
+
+ /*
+ * The trace format isn't parseable in reverse, so clamp
+ * the limit to half of the buffer size in snapshot mode
+ * so that the worst case is half a buffer of records, as
+ * opposed to a single record.
+ */
+ if (head < limit >> 1)
+ limit >>= 1;
+
+ /*
+ * If we're within max_record_sz of the limit, we must
+ * pad, move the head index and recompute the limit.
+ */
+ if (limit - head < spe_pmu->max_record_sz) {
+ arm_spe_pmu_pad_buf(handle, limit - head);
+ handle->head = PERF_IDX2OFF(limit, buf);
+ limit = ((buf->nr_pages * PAGE_SIZE) >> 1) + handle->head;
+ }
+
+ return limit;
+}
+
+static u64 __arm_spe_pmu_next_off(struct perf_output_handle *handle)
+{
+ struct arm_spe_pmu *spe_pmu = to_spe_pmu(handle->event->pmu);
+ struct arm_spe_pmu_buf *buf = perf_get_aux(handle);
+ const u64 bufsize = buf->nr_pages * PAGE_SIZE;
+ u64 limit = bufsize;
+ u64 head, tail, wakeup;
+
+ /*
+ * The head can be misaligned for two reasons:
+ *
+ * 1. The hardware left PMBPTR pointing to the first byte after
+ * a record when generating a buffer management event.
+ *
+ * 2. We used perf_aux_output_skip to consume handle->size bytes
+ * and CIRC_SPACE was used to compute the size, which always
+ * leaves one entry free.
+ *
+ * Deal with this by padding to the next alignment boundary and
+ * moving the head index. If we run out of buffer space, we'll
+ * reduce handle->size to zero and end up reporting truncation.
+ */
+ head = PERF_IDX2OFF(handle->head, buf);
+ if (!IS_ALIGNED(head, spe_pmu->align)) {
+ unsigned long delta = roundup(head, spe_pmu->align) - head;
+
+ delta = min(delta, handle->size);
+ arm_spe_pmu_pad_buf(handle, delta);
+ head = PERF_IDX2OFF(handle->head, buf);
+ }
+
+ /* If we've run out of free space, then nothing more to do */
+ if (!handle->size)
+ goto no_space;
+
+ /* Compute the tail and wakeup indices now that we've aligned head */
+ tail = PERF_IDX2OFF(handle->head + handle->size, buf);
+ wakeup = PERF_IDX2OFF(handle->wakeup, buf);
+
+ /*
+ * Avoid clobbering unconsumed data. We know we have space, so
+ * if we see head == tail we know that the buffer is empty. If
+ * head > tail, then there's nothing to clobber prior to
+ * wrapping.
+ */
+ if (head < tail)
+ limit = round_down(tail, PAGE_SIZE);
+
+ /*
+ * Wakeup may be arbitrarily far into the future. If it's not in
+ * the current generation, either we'll wrap before hitting it,
+ * or it's in the past and has been handled already.
+ *
+ * If there's a wakeup before we wrap, arrange to be woken up by
+ * the page boundary following it. Keep the tail boundary if
+ * that's lower.
+ */
+ if (handle->wakeup < (handle->head + handle->size) && head <= wakeup)
+ limit = min(limit, round_up(wakeup, PAGE_SIZE));
+
+ if (limit > head)
+ return limit;
+
+ arm_spe_pmu_pad_buf(handle, handle->size);
+no_space:
+ perf_aux_output_flag(handle, PERF_AUX_FLAG_TRUNCATED);
+ perf_aux_output_end(handle, 0);
+ return 0;
+}
+
+static u64 arm_spe_pmu_next_off(struct perf_output_handle *handle)
+{
+ struct arm_spe_pmu_buf *buf = perf_get_aux(handle);
+ struct arm_spe_pmu *spe_pmu = to_spe_pmu(handle->event->pmu);
+ u64 limit = __arm_spe_pmu_next_off(handle);
+ u64 head = PERF_IDX2OFF(handle->head, buf);
+
+ /*
+ * If the head has come too close to the end of the buffer,
+ * then pad to the end and recompute the limit.
+ */
+ if (limit && (limit - head < spe_pmu->max_record_sz)) {
+ arm_spe_pmu_pad_buf(handle, limit - head);
+ limit = __arm_spe_pmu_next_off(handle);
+ }
+
+ return limit;
+}
+
+static void arm_spe_perf_aux_output_begin(struct perf_output_handle *handle,
+ struct perf_event *event)
+{
+ u64 base, limit;
+ struct arm_spe_pmu_buf *buf;
+
+ /* Start a new aux session */
+ buf = perf_aux_output_begin(handle, event);
+ if (!buf) {
+ event->hw.state |= PERF_HES_STOPPED;
+ /*
+ * We still need to clear the limit pointer, since the
+ * profiler might only be disabled by virtue of a fault.
+ */
+ limit = 0;
+ goto out_write_limit;
+ }
+
+ limit = buf->snapshot ? arm_spe_pmu_next_snapshot_off(handle)
+ : arm_spe_pmu_next_off(handle);
+ if (limit)
+ limit |= BIT(SYS_PMBLIMITR_EL1_E_SHIFT);
+
+ limit += (u64)buf->base;
+ base = (u64)buf->base + PERF_IDX2OFF(handle->head, buf);
+ write_sysreg_s(base, SYS_PMBPTR_EL1);
+
+out_write_limit:
+ write_sysreg_s(limit, SYS_PMBLIMITR_EL1);
+}
+
+static void arm_spe_perf_aux_output_end(struct perf_output_handle *handle)
+{
+ struct arm_spe_pmu_buf *buf = perf_get_aux(handle);
+ u64 offset, size;
+
+ offset = read_sysreg_s(SYS_PMBPTR_EL1) - (u64)buf->base;
+ size = offset - PERF_IDX2OFF(handle->head, buf);
+
+ if (buf->snapshot)
+ handle->head = offset;
+
+ perf_aux_output_end(handle, size);
+}
+
+static void arm_spe_pmu_disable_and_drain_local(void)
+{
+ /* Disable profiling at EL0 and EL1 */
+ write_sysreg_s(0, SYS_PMSCR_EL1);
+ isb();
+
+ /* Drain any buffered data */
+ psb_csync();
+ dsb(nsh);
+
+ /* Disable the profiling buffer */
+ write_sysreg_s(0, SYS_PMBLIMITR_EL1);
+ isb();
+}
+
+/* IRQ handling */
+static enum arm_spe_pmu_buf_fault_action
+arm_spe_pmu_buf_get_fault_act(struct perf_output_handle *handle)
+{
+ const char *err_str;
+ u64 pmbsr;
+ enum arm_spe_pmu_buf_fault_action ret;
+
+ /*
+ * Ensure new profiling data is visible to the CPU and any external
+ * aborts have been resolved.
+ */
+ psb_csync();
+ dsb(nsh);
+
+ /* Ensure hardware updates to PMBPTR_EL1 are visible */
+ isb();
+
+ /* Service required? */
+ pmbsr = read_sysreg_s(SYS_PMBSR_EL1);
+ if (!(pmbsr & BIT(SYS_PMBSR_EL1_S_SHIFT)))
+ return SPE_PMU_BUF_FAULT_ACT_SPURIOUS;
+
+ /*
+ * If we've lost data, disable profiling and also set the PARTIAL
+ * flag to indicate that the last record is corrupted.
+ */
+ if (pmbsr & BIT(SYS_PMBSR_EL1_DL_SHIFT))
+ perf_aux_output_flag(handle, PERF_AUX_FLAG_TRUNCATED |
+ PERF_AUX_FLAG_PARTIAL);
+
+ /* Report collisions to userspace so that it can up the period */
+ if (pmbsr & BIT(SYS_PMBSR_EL1_COLL_SHIFT))
+ perf_aux_output_flag(handle, PERF_AUX_FLAG_COLLISION);
+
+ /* We only expect buffer management events */
+ switch (pmbsr & (SYS_PMBSR_EL1_EC_MASK << SYS_PMBSR_EL1_EC_SHIFT)) {
+ case SYS_PMBSR_EL1_EC_BUF:
+ /* Handled below */
+ break;
+ case SYS_PMBSR_EL1_EC_FAULT_S1:
+ case SYS_PMBSR_EL1_EC_FAULT_S2:
+ err_str = "Unexpected buffer fault";
+ goto out_err;
+ default:
+ err_str = "Unknown error code";
+ goto out_err;
+ }
+
+ /* Buffer management event */
+ switch (pmbsr &
+ (SYS_PMBSR_EL1_BUF_BSC_MASK << SYS_PMBSR_EL1_BUF_BSC_SHIFT)) {
+ case SYS_PMBSR_EL1_BUF_BSC_FULL:
+ ret = SPE_PMU_BUF_FAULT_ACT_OK;
+ goto out_stop;
+ default:
+ err_str = "Unknown buffer status code";
+ }
+
+out_err:
+ pr_err_ratelimited("%s on CPU %d [PMBSR=0x%016llx, PMBPTR=0x%016llx, PMBLIMITR=0x%016llx]\n",
+ err_str, smp_processor_id(), pmbsr,
+ read_sysreg_s(SYS_PMBPTR_EL1),
+ read_sysreg_s(SYS_PMBLIMITR_EL1));
+ ret = SPE_PMU_BUF_FAULT_ACT_FATAL;
+
+out_stop:
+ arm_spe_perf_aux_output_end(handle);
+ return ret;
+}
+
+static irqreturn_t arm_spe_pmu_irq_handler(int irq, void *dev)
+{
+ struct perf_output_handle *handle = dev;
+ struct perf_event *event = handle->event;
+ enum arm_spe_pmu_buf_fault_action act;
+
+ if (!perf_get_aux(handle))
+ return IRQ_NONE;
+
+ act = arm_spe_pmu_buf_get_fault_act(handle);
+ if (act == SPE_PMU_BUF_FAULT_ACT_SPURIOUS)
+ return IRQ_NONE;
+
+ /*
+ * Ensure perf callbacks have completed, which may disable the
+ * profiling buffer in response to a TRUNCATION flag.
+ */
+ irq_work_run();
+
+ switch (act) {
+ case SPE_PMU_BUF_FAULT_ACT_FATAL:
+ /*
+ * If a fatal exception occurred then leaving the profiling
+ * buffer enabled is a recipe waiting to happen. Since
+ * fatal faults don't always imply truncation, make sure
+ * that the profiling buffer is disabled explicitly before
+ * clearing the syndrome register.
+ */
+ arm_spe_pmu_disable_and_drain_local();
+ break;
+ case SPE_PMU_BUF_FAULT_ACT_OK:
+ /*
+ * We handled the fault (the buffer was full), so resume
+ * profiling as long as we didn't detect truncation.
+ * PMBPTR might be misaligned, but we'll burn that bridge
+ * when we get to it.
+ */
+ if (!(handle->aux_flags & PERF_AUX_FLAG_TRUNCATED)) {
+ arm_spe_perf_aux_output_begin(handle, event);
+ isb();
+ }
+ break;
+ case SPE_PMU_BUF_FAULT_ACT_SPURIOUS:
+ /* We've seen you before, but GCC has the memory of a sieve. */
+ break;
+ }
+
+ /* The buffer pointers are now sane, so resume profiling. */
+ write_sysreg_s(0, SYS_PMBSR_EL1);
+ return IRQ_HANDLED;
+}
+
+/* Perf callbacks */
+static int arm_spe_pmu_event_init(struct perf_event *event)
+{
+ u64 reg;
+ struct perf_event_attr *attr = &event->attr;
+ struct arm_spe_pmu *spe_pmu = to_spe_pmu(event->pmu);
+
+ /* This is, of course, deeply driver-specific */
+ if (attr->type != event->pmu->type)
+ return -ENOENT;
+
+ if (event->cpu >= 0 &&
+ !cpumask_test_cpu(event->cpu, &spe_pmu->supported_cpus))
+ return -ENOENT;
+
+ if (arm_spe_event_to_pmsevfr(event) & SYS_PMSEVFR_EL1_RES0)
+ return -EOPNOTSUPP;
+
+ if (attr->exclude_idle)
+ return -EOPNOTSUPP;
+
+ /*
+ * Feedback-directed frequency throttling doesn't work when we
+ * have a buffer of samples. We'd need to manually count the
+ * samples in the buffer when it fills up and adjust the event
+ * count to reflect that. Instead, just force the user to specify
+ * a sample period.
+ */
+ if (attr->freq)
+ return -EINVAL;
+
+ reg = arm_spe_event_to_pmsfcr(event);
+ if ((reg & BIT(SYS_PMSFCR_EL1_FE_SHIFT)) &&
+ !(spe_pmu->features & SPE_PMU_FEAT_FILT_EVT))
+ return -EOPNOTSUPP;
+
+ if ((reg & BIT(SYS_PMSFCR_EL1_FT_SHIFT)) &&
+ !(spe_pmu->features & SPE_PMU_FEAT_FILT_TYP))
+ return -EOPNOTSUPP;
+
+ if ((reg & BIT(SYS_PMSFCR_EL1_FL_SHIFT)) &&
+ !(spe_pmu->features & SPE_PMU_FEAT_FILT_LAT))
+ return -EOPNOTSUPP;
+
+ reg = arm_spe_event_to_pmscr(event);
+ if (!capable(CAP_SYS_ADMIN) &&
+ (reg & (BIT(SYS_PMSCR_EL1_PA_SHIFT) |
+ BIT(SYS_PMSCR_EL1_CX_SHIFT) |
+ BIT(SYS_PMSCR_EL1_PCT_SHIFT))))
+ return -EACCES;
+
+ return 0;
+}
+
+static void arm_spe_pmu_start(struct perf_event *event, int flags)
+{
+ u64 reg;
+ struct arm_spe_pmu *spe_pmu = to_spe_pmu(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+ struct perf_output_handle *handle = this_cpu_ptr(spe_pmu->handle);
+
+ hwc->state = 0;
+ arm_spe_perf_aux_output_begin(handle, event);
+ if (hwc->state)
+ return;
+
+ reg = arm_spe_event_to_pmsfcr(event);
+ write_sysreg_s(reg, SYS_PMSFCR_EL1);
+
+ reg = arm_spe_event_to_pmsevfr(event);
+ write_sysreg_s(reg, SYS_PMSEVFR_EL1);
+
+ reg = arm_spe_event_to_pmslatfr(event);
+ write_sysreg_s(reg, SYS_PMSLATFR_EL1);
+
+ if (flags & PERF_EF_RELOAD) {
+ reg = arm_spe_event_to_pmsirr(event);
+ write_sysreg_s(reg, SYS_PMSIRR_EL1);
+ isb();
+ reg = local64_read(&hwc->period_left);
+ write_sysreg_s(reg, SYS_PMSICR_EL1);
+ }
+
+ reg = arm_spe_event_to_pmscr(event);
+ isb();
+ write_sysreg_s(reg, SYS_PMSCR_EL1);
+}
+
+static void arm_spe_pmu_stop(struct perf_event *event, int flags)
+{
+ struct arm_spe_pmu *spe_pmu = to_spe_pmu(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+ struct perf_output_handle *handle = this_cpu_ptr(spe_pmu->handle);
+
+ /* If we're already stopped, then nothing to do */
+ if (hwc->state & PERF_HES_STOPPED)
+ return;
+
+ /* Stop all trace generation */
+ arm_spe_pmu_disable_and_drain_local();
+
+ if (flags & PERF_EF_UPDATE) {
+ /*
+ * If there's a fault pending then ensure we contain it
+ * to this buffer, since we might be on the context-switch
+ * path.
+ */
+ if (perf_get_aux(handle)) {
+ enum arm_spe_pmu_buf_fault_action act;
+
+ act = arm_spe_pmu_buf_get_fault_act(handle);
+ if (act == SPE_PMU_BUF_FAULT_ACT_SPURIOUS)
+ arm_spe_perf_aux_output_end(handle);
+ else
+ write_sysreg_s(0, SYS_PMBSR_EL1);
+ }
+
+ /*
+ * This may also contain ECOUNT, but nobody else should
+ * be looking at period_left, since we forbid frequency
+ * based sampling.
+ */
+ local64_set(&hwc->period_left, read_sysreg_s(SYS_PMSICR_EL1));
+ hwc->state |= PERF_HES_UPTODATE;
+ }
+
+ hwc->state |= PERF_HES_STOPPED;
+}
+
+static int arm_spe_pmu_add(struct perf_event *event, int flags)
+{
+ int ret = 0;
+ struct arm_spe_pmu *spe_pmu = to_spe_pmu(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+ int cpu = event->cpu == -1 ? smp_processor_id() : event->cpu;
+
+ if (!cpumask_test_cpu(cpu, &spe_pmu->supported_cpus))
+ return -ENOENT;
+
+ hwc->state = PERF_HES_UPTODATE | PERF_HES_STOPPED;
+
+ if (flags & PERF_EF_START) {
+ arm_spe_pmu_start(event, PERF_EF_RELOAD);
+ if (hwc->state & PERF_HES_STOPPED)
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static void arm_spe_pmu_del(struct perf_event *event, int flags)
+{
+ arm_spe_pmu_stop(event, PERF_EF_UPDATE);
+}
+
+static void arm_spe_pmu_read(struct perf_event *event)
+{
+}
+
+static void *arm_spe_pmu_setup_aux(int cpu, void **pages, int nr_pages,
+ bool snapshot)
+{
+ int i;
+ struct page **pglist;
+ struct arm_spe_pmu_buf *buf;
+
+ /* We need at least two pages for this to work. */
+ if (nr_pages < 2)
+ return NULL;
+
+ /*
+ * We require an even number of pages for snapshot mode, so that
+ * we can effectively treat the buffer as consisting of two equal
+ * parts and give userspace a fighting chance of getting some
+ * useful data out of it.
+ */
+ if (!nr_pages || (snapshot && (nr_pages & 1)))
+ return NULL;
+
+ if (cpu == -1)
+ cpu = raw_smp_processor_id();
+
+ buf = kzalloc_node(sizeof(*buf), GFP_KERNEL, cpu_to_node(cpu));
+ if (!buf)
+ return NULL;
+
+ pglist = kcalloc(nr_pages, sizeof(*pglist), GFP_KERNEL);
+ if (!pglist)
+ goto out_free_buf;
+
+ for (i = 0; i < nr_pages; ++i) {
+ struct page *page = virt_to_page(pages[i]);
+
+ if (PagePrivate(page)) {
+ pr_warn("unexpected high-order page for auxbuf!");
+ goto out_free_pglist;
+ }
+
+ pglist[i] = virt_to_page(pages[i]);
+ }
+
+ buf->base = vmap(pglist, nr_pages, VM_MAP, PAGE_KERNEL);
+ if (!buf->base)
+ goto out_free_pglist;
+
+ buf->nr_pages = nr_pages;
+ buf->snapshot = snapshot;
+
+ kfree(pglist);
+ return buf;
+
+out_free_pglist:
+ kfree(pglist);
+out_free_buf:
+ kfree(buf);
+ return NULL;
+}
+
+static void arm_spe_pmu_free_aux(void *aux)
+{
+ struct arm_spe_pmu_buf *buf = aux;
+
+ vunmap(buf->base);
+ kfree(buf);
+}
+
+/* Initialisation and teardown functions */
+static int arm_spe_pmu_perf_init(struct arm_spe_pmu *spe_pmu)
+{
+ static atomic_t pmu_idx = ATOMIC_INIT(-1);
+
+ int idx;
+ char *name;
+ struct device *dev = &spe_pmu->pdev->dev;
+
+ spe_pmu->pmu = (struct pmu) {
+ .module = THIS_MODULE,
+ .capabilities = PERF_PMU_CAP_EXCLUSIVE | PERF_PMU_CAP_ITRACE,
+ .attr_groups = arm_spe_pmu_attr_groups,
+ /*
+ * We hitch a ride on the software context here, so that
+ * we can support per-task profiling (which is not possible
+ * with the invalid context as it doesn't get sched callbacks).
+ * This requires that userspace either uses a dummy event for
+ * perf_event_open, since the aux buffer is not setup until
+ * a subsequent mmap, or creates the profiling event in a
+ * disabled state and explicitly PERF_EVENT_IOC_ENABLEs it
+ * once the buffer has been created.
+ */
+ .task_ctx_nr = perf_sw_context,
+ .event_init = arm_spe_pmu_event_init,
+ .add = arm_spe_pmu_add,
+ .del = arm_spe_pmu_del,
+ .start = arm_spe_pmu_start,
+ .stop = arm_spe_pmu_stop,
+ .read = arm_spe_pmu_read,
+ .setup_aux = arm_spe_pmu_setup_aux,
+ .free_aux = arm_spe_pmu_free_aux,
+ };
+
+ idx = atomic_inc_return(&pmu_idx);
+ name = devm_kasprintf(dev, GFP_KERNEL, "%s_%d", PMUNAME, idx);
+ return perf_pmu_register(&spe_pmu->pmu, name, -1);
+}
+
+static void arm_spe_pmu_perf_destroy(struct arm_spe_pmu *spe_pmu)
+{
+ perf_pmu_unregister(&spe_pmu->pmu);
+}
+
+static void __arm_spe_pmu_dev_probe(void *info)
+{
+ int fld;
+ u64 reg;
+ struct arm_spe_pmu *spe_pmu = info;
+ struct device *dev = &spe_pmu->pdev->dev;
+
+ fld = cpuid_feature_extract_unsigned_field(read_cpuid(ID_AA64DFR0_EL1),
+ ID_AA64DFR0_PMSVER_SHIFT);
+ if (!fld) {
+ dev_err(dev,
+ "unsupported ID_AA64DFR0_EL1.PMSVer [%d] on CPU %d\n",
+ fld, smp_processor_id());
+ return;
+ }
+
+ /* Read PMBIDR first to determine whether or not we have access */
+ reg = read_sysreg_s(SYS_PMBIDR_EL1);
+ if (reg & BIT(SYS_PMBIDR_EL1_P_SHIFT)) {
+ dev_err(dev,
+ "profiling buffer owned by higher exception level\n");
+ return;
+ }
+
+ /* Minimum alignment. If it's out-of-range, then fail the probe */
+ fld = reg >> SYS_PMBIDR_EL1_ALIGN_SHIFT & SYS_PMBIDR_EL1_ALIGN_MASK;
+ spe_pmu->align = 1 << fld;
+ if (spe_pmu->align > SZ_2K) {
+ dev_err(dev, "unsupported PMBIDR.Align [%d] on CPU %d\n",
+ fld, smp_processor_id());
+ return;
+ }
+
+ /* It's now safe to read PMSIDR and figure out what we've got */
+ reg = read_sysreg_s(SYS_PMSIDR_EL1);
+ if (reg & BIT(SYS_PMSIDR_EL1_FE_SHIFT))
+ spe_pmu->features |= SPE_PMU_FEAT_FILT_EVT;
+
+ if (reg & BIT(SYS_PMSIDR_EL1_FT_SHIFT))
+ spe_pmu->features |= SPE_PMU_FEAT_FILT_TYP;
+
+ if (reg & BIT(SYS_PMSIDR_EL1_FL_SHIFT))
+ spe_pmu->features |= SPE_PMU_FEAT_FILT_LAT;
+
+ if (reg & BIT(SYS_PMSIDR_EL1_ARCHINST_SHIFT))
+ spe_pmu->features |= SPE_PMU_FEAT_ARCH_INST;
+
+ if (reg & BIT(SYS_PMSIDR_EL1_LDS_SHIFT))
+ spe_pmu->features |= SPE_PMU_FEAT_LDS;
+
+ if (reg & BIT(SYS_PMSIDR_EL1_ERND_SHIFT))
+ spe_pmu->features |= SPE_PMU_FEAT_ERND;
+
+ /* This field has a spaced out encoding, so just use a look-up */
+ fld = reg >> SYS_PMSIDR_EL1_INTERVAL_SHIFT & SYS_PMSIDR_EL1_INTERVAL_MASK;
+ switch (fld) {
+ case 0:
+ spe_pmu->min_period = 256;
+ break;
+ case 2:
+ spe_pmu->min_period = 512;
+ break;
+ case 3:
+ spe_pmu->min_period = 768;
+ break;
+ case 4:
+ spe_pmu->min_period = 1024;
+ break;
+ case 5:
+ spe_pmu->min_period = 1536;
+ break;
+ case 6:
+ spe_pmu->min_period = 2048;
+ break;
+ case 7:
+ spe_pmu->min_period = 3072;
+ break;
+ default:
+ dev_warn(dev, "unknown PMSIDR_EL1.Interval [%d]; assuming 8\n",
+ fld);
+ /* Fallthrough */
+ case 8:
+ spe_pmu->min_period = 4096;
+ }
+
+ /* Maximum record size. If it's out-of-range, then fail the probe */
+ fld = reg >> SYS_PMSIDR_EL1_MAXSIZE_SHIFT & SYS_PMSIDR_EL1_MAXSIZE_MASK;
+ spe_pmu->max_record_sz = 1 << fld;
+ if (spe_pmu->max_record_sz > SZ_2K || spe_pmu->max_record_sz < 16) {
+ dev_err(dev, "unsupported PMSIDR_EL1.MaxSize [%d] on CPU %d\n",
+ fld, smp_processor_id());
+ return;
+ }
+
+ fld = reg >> SYS_PMSIDR_EL1_COUNTSIZE_SHIFT & SYS_PMSIDR_EL1_COUNTSIZE_MASK;
+ switch (fld) {
+ default:
+ dev_warn(dev, "unknown PMSIDR_EL1.CountSize [%d]; assuming 2\n",
+ fld);
+ /* Fallthrough */
+ case 2:
+ spe_pmu->counter_sz = 12;
+ }
+
+ dev_info(dev,
+ "probed for CPUs %*pbl [max_record_sz %u, align %u, features 0x%llx]\n",
+ cpumask_pr_args(&spe_pmu->supported_cpus),
+ spe_pmu->max_record_sz, spe_pmu->align, spe_pmu->features);
+
+ spe_pmu->features |= SPE_PMU_FEAT_DEV_PROBED;
+ return;
+}
+
+static void __arm_spe_pmu_reset_local(void)
+{
+ /*
+ * This is probably overkill, as we have no idea where we're
+ * draining any buffered data to...
+ */
+ arm_spe_pmu_disable_and_drain_local();
+
+ /* Reset the buffer base pointer */
+ write_sysreg_s(0, SYS_PMBPTR_EL1);
+ isb();
+
+ /* Clear any pending management interrupts */
+ write_sysreg_s(0, SYS_PMBSR_EL1);
+ isb();
+}
+
+static void __arm_spe_pmu_setup_one(void *info)
+{
+ struct arm_spe_pmu *spe_pmu = info;
+
+ __arm_spe_pmu_reset_local();
+ enable_percpu_irq(spe_pmu->irq, IRQ_TYPE_NONE);
+}
+
+static void __arm_spe_pmu_stop_one(void *info)
+{
+ struct arm_spe_pmu *spe_pmu = info;
+
+ disable_percpu_irq(spe_pmu->irq);
+ __arm_spe_pmu_reset_local();
+}
+
+static int arm_spe_pmu_cpu_startup(unsigned int cpu, struct hlist_node *node)
+{
+ struct arm_spe_pmu *spe_pmu;
+
+ spe_pmu = hlist_entry_safe(node, struct arm_spe_pmu, hotplug_node);
+ if (!cpumask_test_cpu(cpu, &spe_pmu->supported_cpus))
+ return 0;
+
+ __arm_spe_pmu_setup_one(spe_pmu);
+ return 0;
+}
+
+static int arm_spe_pmu_cpu_teardown(unsigned int cpu, struct hlist_node *node)
+{
+ struct arm_spe_pmu *spe_pmu;
+
+ spe_pmu = hlist_entry_safe(node, struct arm_spe_pmu, hotplug_node);
+ if (!cpumask_test_cpu(cpu, &spe_pmu->supported_cpus))
+ return 0;
+
+ __arm_spe_pmu_stop_one(spe_pmu);
+ return 0;
+}
+
+static int arm_spe_pmu_dev_init(struct arm_spe_pmu *spe_pmu)
+{
+ int ret;
+ cpumask_t *mask = &spe_pmu->supported_cpus;
+
+ /* Make sure we probe the hardware on a relevant CPU */
+ ret = smp_call_function_any(mask, __arm_spe_pmu_dev_probe, spe_pmu, 1);
+ if (ret || !(spe_pmu->features & SPE_PMU_FEAT_DEV_PROBED))
+ return -ENXIO;
+
+ /* Request our PPIs (note that the IRQ is still disabled) */
+ ret = request_percpu_irq(spe_pmu->irq, arm_spe_pmu_irq_handler, DRVNAME,
+ spe_pmu->handle);
+ if (ret)
+ return ret;
+
+ /*
+ * Register our hotplug notifier now so we don't miss any events.
+ * This will enable the IRQ for any supported CPUs that are already
+ * up.
+ */
+ ret = cpuhp_state_add_instance(arm_spe_pmu_online,
+ &spe_pmu->hotplug_node);
+ if (ret)
+ free_percpu_irq(spe_pmu->irq, spe_pmu->handle);
+
+ return ret;
+}
+
+static void arm_spe_pmu_dev_teardown(struct arm_spe_pmu *spe_pmu)
+{
+ cpuhp_state_remove_instance(arm_spe_pmu_online, &spe_pmu->hotplug_node);
+ free_percpu_irq(spe_pmu->irq, spe_pmu->handle);
+}
+
+/* Driver and device probing */
+static int arm_spe_pmu_irq_probe(struct arm_spe_pmu *spe_pmu)
+{
+ struct platform_device *pdev = spe_pmu->pdev;
+ int irq = platform_get_irq(pdev, 0);
+
+ if (irq < 0) {
+ dev_err(&pdev->dev, "failed to get IRQ (%d)\n", irq);
+ return -ENXIO;
+ }
+
+ if (!irq_is_percpu(irq)) {
+ dev_err(&pdev->dev, "expected PPI but got SPI (%d)\n", irq);
+ return -EINVAL;
+ }
+
+ if (irq_get_percpu_devid_partition(irq, &spe_pmu->supported_cpus)) {
+ dev_err(&pdev->dev, "failed to get PPI partition (%d)\n", irq);
+ return -EINVAL;
+ }
+
+ spe_pmu->irq = irq;
+ return 0;
+}
+
+static const struct of_device_id arm_spe_pmu_of_match[] = {
+ { .compatible = "arm,statistical-profiling-extension-v1", .data = (void *)1 },
+ { /* Sentinel */ },
+};
+
+static int arm_spe_pmu_device_dt_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct arm_spe_pmu *spe_pmu;
+ struct device *dev = &pdev->dev;
+
+ spe_pmu = devm_kzalloc(dev, sizeof(*spe_pmu), GFP_KERNEL);
+ if (!spe_pmu) {
+ dev_err(dev, "failed to allocate spe_pmu\n");
+ return -ENOMEM;
+ }
+
+ spe_pmu->handle = alloc_percpu(typeof(*spe_pmu->handle));
+ if (!spe_pmu->handle)
+ return -ENOMEM;
+
+ spe_pmu->pdev = pdev;
+ platform_set_drvdata(pdev, spe_pmu);
+
+ ret = arm_spe_pmu_irq_probe(spe_pmu);
+ if (ret)
+ goto out_free_handle;
+
+ ret = arm_spe_pmu_dev_init(spe_pmu);
+ if (ret)
+ goto out_free_handle;
+
+ ret = arm_spe_pmu_perf_init(spe_pmu);
+ if (ret)
+ goto out_teardown_dev;
+
+ return 0;
+
+out_teardown_dev:
+ arm_spe_pmu_dev_teardown(spe_pmu);
+out_free_handle:
+ free_percpu(spe_pmu->handle);
+ return ret;
+}
+
+static int arm_spe_pmu_device_remove(struct platform_device *pdev)
+{
+ struct arm_spe_pmu *spe_pmu = platform_get_drvdata(pdev);
+
+ arm_spe_pmu_perf_destroy(spe_pmu);
+ arm_spe_pmu_dev_teardown(spe_pmu);
+ free_percpu(spe_pmu->handle);
+ return 0;
+}
+
+static struct platform_driver arm_spe_pmu_driver = {
+ .driver = {
+ .name = DRVNAME,
+ .of_match_table = of_match_ptr(arm_spe_pmu_of_match),
+ },
+ .probe = arm_spe_pmu_device_dt_probe,
+ .remove = arm_spe_pmu_device_remove,
+};
+
+static int __init arm_spe_pmu_init(void)
+{
+ int ret;
+
+ ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, DRVNAME,
+ arm_spe_pmu_cpu_startup,
+ arm_spe_pmu_cpu_teardown);
+ if (ret < 0)
+ return ret;
+ arm_spe_pmu_online = ret;
+
+ ret = platform_driver_register(&arm_spe_pmu_driver);
+ if (ret)
+ cpuhp_remove_multi_state(arm_spe_pmu_online);
+
+ return ret;
+}
+
+static void __exit arm_spe_pmu_exit(void)
+{
+ platform_driver_unregister(&arm_spe_pmu_driver);
+ cpuhp_remove_multi_state(arm_spe_pmu_online);
+}
+
+module_init(arm_spe_pmu_init);
+module_exit(arm_spe_pmu_exit);
+
+MODULE_DESCRIPTION("Perf driver for the ARMv8.2 Statistical Profiling Extension");
+MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/perf/hisilicon/Makefile b/drivers/perf/hisilicon/Makefile
new file mode 100644
index 000000000000..2621d51ae87a
--- /dev/null
+++ b/drivers/perf/hisilicon/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_HISI_PMU) += hisi_uncore_pmu.o hisi_uncore_l3c_pmu.o hisi_uncore_hha_pmu.o hisi_uncore_ddrc_pmu.o
diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
new file mode 100644
index 000000000000..1b10ea05a914
--- /dev/null
+++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
@@ -0,0 +1,463 @@
+/*
+ * HiSilicon SoC DDRC uncore Hardware event counters support
+ *
+ * Copyright (C) 2017 Hisilicon Limited
+ * Author: Shaokun Zhang <zhangshaokun@hisilicon.com>
+ * Anurup M <anurup.m@huawei.com>
+ *
+ * This code is based on the uncore PMUs like arm-cci and arm-ccn.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/acpi.h>
+#include <linux/bug.h>
+#include <linux/cpuhotplug.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/list.h>
+#include <linux/platform_device.h>
+#include <linux/smp.h>
+
+#include "hisi_uncore_pmu.h"
+
+/* DDRC register definition */
+#define DDRC_PERF_CTRL 0x010
+#define DDRC_FLUX_WR 0x380
+#define DDRC_FLUX_RD 0x384
+#define DDRC_FLUX_WCMD 0x388
+#define DDRC_FLUX_RCMD 0x38c
+#define DDRC_PRE_CMD 0x3c0
+#define DDRC_ACT_CMD 0x3c4
+#define DDRC_BNK_CHG 0x3c8
+#define DDRC_RNK_CHG 0x3cc
+#define DDRC_EVENT_CTRL 0x6C0
+#define DDRC_INT_MASK 0x6c8
+#define DDRC_INT_STATUS 0x6cc
+#define DDRC_INT_CLEAR 0x6d0
+
+/* DDRC has 8-counters */
+#define DDRC_NR_COUNTERS 0x8
+#define DDRC_PERF_CTRL_EN 0x2
+
+/*
+ * For DDRC PMU, there are eight-events and every event has been mapped
+ * to fixed-purpose counters which register offset is not consistent.
+ * Therefore there is no write event type and we assume that event
+ * code (0 to 7) is equal to counter index in PMU driver.
+ */
+#define GET_DDRC_EVENTID(hwc) (hwc->config_base & 0x7)
+
+static const u32 ddrc_reg_off[] = {
+ DDRC_FLUX_WR, DDRC_FLUX_RD, DDRC_FLUX_WCMD, DDRC_FLUX_RCMD,
+ DDRC_PRE_CMD, DDRC_ACT_CMD, DDRC_BNK_CHG, DDRC_RNK_CHG
+};
+
+/*
+ * Select the counter register offset using the counter index.
+ * In DDRC there are no programmable counter, the count
+ * is readed form the statistics counter register itself.
+ */
+static u32 hisi_ddrc_pmu_get_counter_offset(int cntr_idx)
+{
+ return ddrc_reg_off[cntr_idx];
+}
+
+static u64 hisi_ddrc_pmu_read_counter(struct hisi_pmu *ddrc_pmu,
+ struct hw_perf_event *hwc)
+{
+ /* Use event code as counter index */
+ u32 idx = GET_DDRC_EVENTID(hwc);
+
+ if (!hisi_uncore_pmu_counter_valid(ddrc_pmu, idx)) {
+ dev_err(ddrc_pmu->dev, "Unsupported event index:%d!\n", idx);
+ return 0;
+ }
+
+ return readl(ddrc_pmu->base + hisi_ddrc_pmu_get_counter_offset(idx));
+}
+
+static void hisi_ddrc_pmu_write_counter(struct hisi_pmu *ddrc_pmu,
+ struct hw_perf_event *hwc, u64 val)
+{
+ u32 idx = GET_DDRC_EVENTID(hwc);
+
+ if (!hisi_uncore_pmu_counter_valid(ddrc_pmu, idx)) {
+ dev_err(ddrc_pmu->dev, "Unsupported event index:%d!\n", idx);
+ return;
+ }
+
+ writel((u32)val,
+ ddrc_pmu->base + hisi_ddrc_pmu_get_counter_offset(idx));
+}
+
+/*
+ * For DDRC PMU, event has been mapped to fixed-purpose counter by hardware,
+ * so there is no need to write event type.
+ */
+static void hisi_ddrc_pmu_write_evtype(struct hisi_pmu *hha_pmu, int idx,
+ u32 type)
+{
+}
+
+static void hisi_ddrc_pmu_start_counters(struct hisi_pmu *ddrc_pmu)
+{
+ u32 val;
+
+ /* Set perf_enable in DDRC_PERF_CTRL to start event counting */
+ val = readl(ddrc_pmu->base + DDRC_PERF_CTRL);
+ val |= DDRC_PERF_CTRL_EN;
+ writel(val, ddrc_pmu->base + DDRC_PERF_CTRL);
+}
+
+static void hisi_ddrc_pmu_stop_counters(struct hisi_pmu *ddrc_pmu)
+{
+ u32 val;
+
+ /* Clear perf_enable in DDRC_PERF_CTRL to stop event counting */
+ val = readl(ddrc_pmu->base + DDRC_PERF_CTRL);
+ val &= ~DDRC_PERF_CTRL_EN;
+ writel(val, ddrc_pmu->base + DDRC_PERF_CTRL);
+}
+
+static void hisi_ddrc_pmu_enable_counter(struct hisi_pmu *ddrc_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Set counter index(event code) in DDRC_EVENT_CTRL register */
+ val = readl(ddrc_pmu->base + DDRC_EVENT_CTRL);
+ val |= (1 << GET_DDRC_EVENTID(hwc));
+ writel(val, ddrc_pmu->base + DDRC_EVENT_CTRL);
+}
+
+static void hisi_ddrc_pmu_disable_counter(struct hisi_pmu *ddrc_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Clear counter index(event code) in DDRC_EVENT_CTRL register */
+ val = readl(ddrc_pmu->base + DDRC_EVENT_CTRL);
+ val &= ~(1 << GET_DDRC_EVENTID(hwc));
+ writel(val, ddrc_pmu->base + DDRC_EVENT_CTRL);
+}
+
+static int hisi_ddrc_pmu_get_event_idx(struct perf_event *event)
+{
+ struct hisi_pmu *ddrc_pmu = to_hisi_pmu(event->pmu);
+ unsigned long *used_mask = ddrc_pmu->pmu_events.used_mask;
+ struct hw_perf_event *hwc = &event->hw;
+ /* For DDRC PMU, we use event code as counter index */
+ int idx = GET_DDRC_EVENTID(hwc);
+
+ if (test_bit(idx, used_mask))
+ return -EAGAIN;
+
+ set_bit(idx, used_mask);
+
+ return idx;
+}
+
+static void hisi_ddrc_pmu_enable_counter_int(struct hisi_pmu *ddrc_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Write 0 to enable interrupt */
+ val = readl(ddrc_pmu->base + DDRC_INT_MASK);
+ val &= ~(1 << GET_DDRC_EVENTID(hwc));
+ writel(val, ddrc_pmu->base + DDRC_INT_MASK);
+}
+
+static void hisi_ddrc_pmu_disable_counter_int(struct hisi_pmu *ddrc_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Write 1 to mask interrupt */
+ val = readl(ddrc_pmu->base + DDRC_INT_MASK);
+ val |= (1 << GET_DDRC_EVENTID(hwc));
+ writel(val, ddrc_pmu->base + DDRC_INT_MASK);
+}
+
+static irqreturn_t hisi_ddrc_pmu_isr(int irq, void *dev_id)
+{
+ struct hisi_pmu *ddrc_pmu = dev_id;
+ struct perf_event *event;
+ unsigned long overflown;
+ int idx;
+
+ /* Read the DDRC_INT_STATUS register */
+ overflown = readl(ddrc_pmu->base + DDRC_INT_STATUS);
+ if (!overflown)
+ return IRQ_NONE;
+
+ /*
+ * Find the counter index which overflowed if the bit was set
+ * and handle it
+ */
+ for_each_set_bit(idx, &overflown, DDRC_NR_COUNTERS) {
+ /* Write 1 to clear the IRQ status flag */
+ writel((1 << idx), ddrc_pmu->base + DDRC_INT_CLEAR);
+
+ /* Get the corresponding event struct */
+ event = ddrc_pmu->pmu_events.hw_events[idx];
+ if (!event)
+ continue;
+
+ hisi_uncore_pmu_event_update(event);
+ hisi_uncore_pmu_set_event_period(event);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int hisi_ddrc_pmu_init_irq(struct hisi_pmu *ddrc_pmu,
+ struct platform_device *pdev)
+{
+ int irq, ret;
+
+ /* Read and init IRQ */
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "DDRC PMU get irq fail; irq:%d\n", irq);
+ return irq;
+ }
+
+ ret = devm_request_irq(&pdev->dev, irq, hisi_ddrc_pmu_isr,
+ IRQF_NOBALANCING | IRQF_NO_THREAD,
+ dev_name(&pdev->dev), ddrc_pmu);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "Fail to request IRQ:%d ret:%d\n", irq, ret);
+ return ret;
+ }
+
+ ddrc_pmu->irq = irq;
+
+ return 0;
+}
+
+static const struct acpi_device_id hisi_ddrc_pmu_acpi_match[] = {
+ { "HISI0233", },
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, hisi_ddrc_pmu_acpi_match);
+
+static int hisi_ddrc_pmu_init_data(struct platform_device *pdev,
+ struct hisi_pmu *ddrc_pmu)
+{
+ struct resource *res;
+
+ /*
+ * Use the SCCL_ID and DDRC channel ID to identify the
+ * DDRC PMU, while SCCL_ID is in MPIDR[aff2].
+ */
+ if (device_property_read_u32(&pdev->dev, "hisilicon,ch-id",
+ &ddrc_pmu->index_id)) {
+ dev_err(&pdev->dev, "Can not read ddrc channel-id!\n");
+ return -EINVAL;
+ }
+
+ if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
+ &ddrc_pmu->sccl_id)) {
+ dev_err(&pdev->dev, "Can not read ddrc sccl-id!\n");
+ return -EINVAL;
+ }
+ /* DDRC PMUs only share the same SCCL */
+ ddrc_pmu->ccl_id = -1;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ddrc_pmu->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(ddrc_pmu->base)) {
+ dev_err(&pdev->dev, "ioremap failed for ddrc_pmu resource\n");
+ return PTR_ERR(ddrc_pmu->base);
+ }
+
+ return 0;
+}
+
+static struct attribute *hisi_ddrc_pmu_format_attr[] = {
+ HISI_PMU_FORMAT_ATTR(event, "config:0-4"),
+ NULL,
+};
+
+static const struct attribute_group hisi_ddrc_pmu_format_group = {
+ .name = "format",
+ .attrs = hisi_ddrc_pmu_format_attr,
+};
+
+static struct attribute *hisi_ddrc_pmu_events_attr[] = {
+ HISI_PMU_EVENT_ATTR(flux_wr, 0x00),
+ HISI_PMU_EVENT_ATTR(flux_rd, 0x01),
+ HISI_PMU_EVENT_ATTR(flux_wcmd, 0x02),
+ HISI_PMU_EVENT_ATTR(flux_rcmd, 0x03),
+ HISI_PMU_EVENT_ATTR(pre_cmd, 0x04),
+ HISI_PMU_EVENT_ATTR(act_cmd, 0x05),
+ HISI_PMU_EVENT_ATTR(rnk_chg, 0x06),
+ HISI_PMU_EVENT_ATTR(rw_chg, 0x07),
+ NULL,
+};
+
+static const struct attribute_group hisi_ddrc_pmu_events_group = {
+ .name = "events",
+ .attrs = hisi_ddrc_pmu_events_attr,
+};
+
+static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
+
+static struct attribute *hisi_ddrc_pmu_cpumask_attrs[] = {
+ &dev_attr_cpumask.attr,
+ NULL,
+};
+
+static const struct attribute_group hisi_ddrc_pmu_cpumask_attr_group = {
+ .attrs = hisi_ddrc_pmu_cpumask_attrs,
+};
+
+static const struct attribute_group *hisi_ddrc_pmu_attr_groups[] = {
+ &hisi_ddrc_pmu_format_group,
+ &hisi_ddrc_pmu_events_group,
+ &hisi_ddrc_pmu_cpumask_attr_group,
+ NULL,
+};
+
+static const struct hisi_uncore_ops hisi_uncore_ddrc_ops = {
+ .write_evtype = hisi_ddrc_pmu_write_evtype,
+ .get_event_idx = hisi_ddrc_pmu_get_event_idx,
+ .start_counters = hisi_ddrc_pmu_start_counters,
+ .stop_counters = hisi_ddrc_pmu_stop_counters,
+ .enable_counter = hisi_ddrc_pmu_enable_counter,
+ .disable_counter = hisi_ddrc_pmu_disable_counter,
+ .enable_counter_int = hisi_ddrc_pmu_enable_counter_int,
+ .disable_counter_int = hisi_ddrc_pmu_disable_counter_int,
+ .write_counter = hisi_ddrc_pmu_write_counter,
+ .read_counter = hisi_ddrc_pmu_read_counter,
+};
+
+static int hisi_ddrc_pmu_dev_probe(struct platform_device *pdev,
+ struct hisi_pmu *ddrc_pmu)
+{
+ int ret;
+
+ ret = hisi_ddrc_pmu_init_data(pdev, ddrc_pmu);
+ if (ret)
+ return ret;
+
+ ret = hisi_ddrc_pmu_init_irq(ddrc_pmu, pdev);
+ if (ret)
+ return ret;
+
+ ddrc_pmu->num_counters = DDRC_NR_COUNTERS;
+ ddrc_pmu->counter_bits = 32;
+ ddrc_pmu->ops = &hisi_uncore_ddrc_ops;
+ ddrc_pmu->dev = &pdev->dev;
+ ddrc_pmu->on_cpu = -1;
+ ddrc_pmu->check_event = 7;
+
+ return 0;
+}
+
+static int hisi_ddrc_pmu_probe(struct platform_device *pdev)
+{
+ struct hisi_pmu *ddrc_pmu;
+ char *name;
+ int ret;
+
+ ddrc_pmu = devm_kzalloc(&pdev->dev, sizeof(*ddrc_pmu), GFP_KERNEL);
+ if (!ddrc_pmu)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, ddrc_pmu);
+
+ ret = hisi_ddrc_pmu_dev_probe(pdev, ddrc_pmu);
+ if (ret)
+ return ret;
+
+ ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE,
+ &ddrc_pmu->node);
+ if (ret) {
+ dev_err(&pdev->dev, "Error %d registering hotplug;\n", ret);
+ return ret;
+ }
+
+ name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_ddrc%u",
+ ddrc_pmu->sccl_id, ddrc_pmu->index_id);
+ ddrc_pmu->pmu = (struct pmu) {
+ .name = name,
+ .task_ctx_nr = perf_invalid_context,
+ .event_init = hisi_uncore_pmu_event_init,
+ .pmu_enable = hisi_uncore_pmu_enable,
+ .pmu_disable = hisi_uncore_pmu_disable,
+ .add = hisi_uncore_pmu_add,
+ .del = hisi_uncore_pmu_del,
+ .start = hisi_uncore_pmu_start,
+ .stop = hisi_uncore_pmu_stop,
+ .read = hisi_uncore_pmu_read,
+ .attr_groups = hisi_ddrc_pmu_attr_groups,
+ };
+
+ ret = perf_pmu_register(&ddrc_pmu->pmu, name, -1);
+ if (ret) {
+ dev_err(ddrc_pmu->dev, "DDRC PMU register failed!\n");
+ cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE,
+ &ddrc_pmu->node);
+ }
+
+ return ret;
+}
+
+static int hisi_ddrc_pmu_remove(struct platform_device *pdev)
+{
+ struct hisi_pmu *ddrc_pmu = platform_get_drvdata(pdev);
+
+ perf_pmu_unregister(&ddrc_pmu->pmu);
+ cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE,
+ &ddrc_pmu->node);
+
+ return 0;
+}
+
+static struct platform_driver hisi_ddrc_pmu_driver = {
+ .driver = {
+ .name = "hisi_ddrc_pmu",
+ .acpi_match_table = ACPI_PTR(hisi_ddrc_pmu_acpi_match),
+ },
+ .probe = hisi_ddrc_pmu_probe,
+ .remove = hisi_ddrc_pmu_remove,
+};
+
+static int __init hisi_ddrc_pmu_module_init(void)
+{
+ int ret;
+
+ ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE,
+ "AP_PERF_ARM_HISI_DDRC_ONLINE",
+ hisi_uncore_pmu_online_cpu,
+ hisi_uncore_pmu_offline_cpu);
+ if (ret) {
+ pr_err("DDRC PMU: setup hotplug, ret = %d\n", ret);
+ return ret;
+ }
+
+ ret = platform_driver_register(&hisi_ddrc_pmu_driver);
+ if (ret)
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE);
+
+ return ret;
+}
+module_init(hisi_ddrc_pmu_module_init);
+
+static void __exit hisi_ddrc_pmu_module_exit(void)
+{
+ platform_driver_unregister(&hisi_ddrc_pmu_driver);
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_DDRC_ONLINE);
+
+}
+module_exit(hisi_ddrc_pmu_module_exit);
+
+MODULE_DESCRIPTION("HiSilicon SoC DDRC uncore PMU driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Shaokun Zhang <zhangshaokun@hisilicon.com>");
+MODULE_AUTHOR("Anurup M <anurup.m@huawei.com>");
diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
new file mode 100644
index 000000000000..443906e0aff3
--- /dev/null
+++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
@@ -0,0 +1,473 @@
+/*
+ * HiSilicon SoC HHA uncore Hardware event counters support
+ *
+ * Copyright (C) 2017 Hisilicon Limited
+ * Author: Shaokun Zhang <zhangshaokun@hisilicon.com>
+ * Anurup M <anurup.m@huawei.com>
+ *
+ * This code is based on the uncore PMUs like arm-cci and arm-ccn.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/acpi.h>
+#include <linux/bug.h>
+#include <linux/cpuhotplug.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/list.h>
+#include <linux/platform_device.h>
+#include <linux/smp.h>
+
+#include "hisi_uncore_pmu.h"
+
+/* HHA register definition */
+#define HHA_INT_MASK 0x0804
+#define HHA_INT_STATUS 0x0808
+#define HHA_INT_CLEAR 0x080C
+#define HHA_PERF_CTRL 0x1E00
+#define HHA_EVENT_CTRL 0x1E04
+#define HHA_EVENT_TYPE0 0x1E80
+/*
+ * Each counter is 48-bits and [48:63] are reserved
+ * which are Read-As-Zero and Writes-Ignored.
+ */
+#define HHA_CNT0_LOWER 0x1F00
+
+/* HHA has 16-counters */
+#define HHA_NR_COUNTERS 0x10
+
+#define HHA_PERF_CTRL_EN 0x1
+#define HHA_EVTYPE_NONE 0xff
+
+/*
+ * Select the counter register offset using the counter index
+ * each counter is 48-bits.
+ */
+static u32 hisi_hha_pmu_get_counter_offset(int cntr_idx)
+{
+ return (HHA_CNT0_LOWER + (cntr_idx * 8));
+}
+
+static u64 hisi_hha_pmu_read_counter(struct hisi_pmu *hha_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 idx = hwc->idx;
+
+ if (!hisi_uncore_pmu_counter_valid(hha_pmu, idx)) {
+ dev_err(hha_pmu->dev, "Unsupported event index:%d!\n", idx);
+ return 0;
+ }
+
+ /* Read 64 bits and like L3C, top 16 bits are RAZ */
+ return readq(hha_pmu->base + hisi_hha_pmu_get_counter_offset(idx));
+}
+
+static void hisi_hha_pmu_write_counter(struct hisi_pmu *hha_pmu,
+ struct hw_perf_event *hwc, u64 val)
+{
+ u32 idx = hwc->idx;
+
+ if (!hisi_uncore_pmu_counter_valid(hha_pmu, idx)) {
+ dev_err(hha_pmu->dev, "Unsupported event index:%d!\n", idx);
+ return;
+ }
+
+ /* Write 64 bits and like L3C, top 16 bits are WI */
+ writeq(val, hha_pmu->base + hisi_hha_pmu_get_counter_offset(idx));
+}
+
+static void hisi_hha_pmu_write_evtype(struct hisi_pmu *hha_pmu, int idx,
+ u32 type)
+{
+ u32 reg, reg_idx, shift, val;
+
+ /*
+ * Select the appropriate event select register(HHA_EVENT_TYPEx).
+ * There are 4 event select registers for the 16 hardware counters.
+ * Event code is 8-bits and for the first 4 hardware counters,
+ * HHA_EVENT_TYPE0 is chosen. For the next 4 hardware counters,
+ * HHA_EVENT_TYPE1 is chosen and so on.
+ */
+ reg = HHA_EVENT_TYPE0 + 4 * (idx / 4);
+ reg_idx = idx % 4;
+ shift = 8 * reg_idx;
+
+ /* Write event code to HHA_EVENT_TYPEx register */
+ val = readl(hha_pmu->base + reg);
+ val &= ~(HHA_EVTYPE_NONE << shift);
+ val |= (type << shift);
+ writel(val, hha_pmu->base + reg);
+}
+
+static void hisi_hha_pmu_start_counters(struct hisi_pmu *hha_pmu)
+{
+ u32 val;
+
+ /*
+ * Set perf_enable bit in HHA_PERF_CTRL to start event
+ * counting for all enabled counters.
+ */
+ val = readl(hha_pmu->base + HHA_PERF_CTRL);
+ val |= HHA_PERF_CTRL_EN;
+ writel(val, hha_pmu->base + HHA_PERF_CTRL);
+}
+
+static void hisi_hha_pmu_stop_counters(struct hisi_pmu *hha_pmu)
+{
+ u32 val;
+
+ /*
+ * Clear perf_enable bit in HHA_PERF_CTRL to stop event
+ * counting for all enabled counters.
+ */
+ val = readl(hha_pmu->base + HHA_PERF_CTRL);
+ val &= ~(HHA_PERF_CTRL_EN);
+ writel(val, hha_pmu->base + HHA_PERF_CTRL);
+}
+
+static void hisi_hha_pmu_enable_counter(struct hisi_pmu *hha_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Enable counter index in HHA_EVENT_CTRL register */
+ val = readl(hha_pmu->base + HHA_EVENT_CTRL);
+ val |= (1 << hwc->idx);
+ writel(val, hha_pmu->base + HHA_EVENT_CTRL);
+}
+
+static void hisi_hha_pmu_disable_counter(struct hisi_pmu *hha_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Clear counter index in HHA_EVENT_CTRL register */
+ val = readl(hha_pmu->base + HHA_EVENT_CTRL);
+ val &= ~(1 << hwc->idx);
+ writel(val, hha_pmu->base + HHA_EVENT_CTRL);
+}
+
+static void hisi_hha_pmu_enable_counter_int(struct hisi_pmu *hha_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Write 0 to enable interrupt */
+ val = readl(hha_pmu->base + HHA_INT_MASK);
+ val &= ~(1 << hwc->idx);
+ writel(val, hha_pmu->base + HHA_INT_MASK);
+}
+
+static void hisi_hha_pmu_disable_counter_int(struct hisi_pmu *hha_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Write 1 to mask interrupt */
+ val = readl(hha_pmu->base + HHA_INT_MASK);
+ val |= (1 << hwc->idx);
+ writel(val, hha_pmu->base + HHA_INT_MASK);
+}
+
+static irqreturn_t hisi_hha_pmu_isr(int irq, void *dev_id)
+{
+ struct hisi_pmu *hha_pmu = dev_id;
+ struct perf_event *event;
+ unsigned long overflown;
+ int idx;
+
+ /* Read HHA_INT_STATUS register */
+ overflown = readl(hha_pmu->base + HHA_INT_STATUS);
+ if (!overflown)
+ return IRQ_NONE;
+
+ /*
+ * Find the counter index which overflowed if the bit was set
+ * and handle it
+ */
+ for_each_set_bit(idx, &overflown, HHA_NR_COUNTERS) {
+ /* Write 1 to clear the IRQ status flag */
+ writel((1 << idx), hha_pmu->base + HHA_INT_CLEAR);
+
+ /* Get the corresponding event struct */
+ event = hha_pmu->pmu_events.hw_events[idx];
+ if (!event)
+ continue;
+
+ hisi_uncore_pmu_event_update(event);
+ hisi_uncore_pmu_set_event_period(event);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int hisi_hha_pmu_init_irq(struct hisi_pmu *hha_pmu,
+ struct platform_device *pdev)
+{
+ int irq, ret;
+
+ /* Read and init IRQ */
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "HHA PMU get irq fail; irq:%d\n", irq);
+ return irq;
+ }
+
+ ret = devm_request_irq(&pdev->dev, irq, hisi_hha_pmu_isr,
+ IRQF_NOBALANCING | IRQF_NO_THREAD,
+ dev_name(&pdev->dev), hha_pmu);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "Fail to request IRQ:%d ret:%d\n", irq, ret);
+ return ret;
+ }
+
+ hha_pmu->irq = irq;
+
+ return 0;
+}
+
+static const struct acpi_device_id hisi_hha_pmu_acpi_match[] = {
+ { "HISI0243", },
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, hisi_hha_pmu_acpi_match);
+
+static int hisi_hha_pmu_init_data(struct platform_device *pdev,
+ struct hisi_pmu *hha_pmu)
+{
+ unsigned long long id;
+ struct resource *res;
+ acpi_status status;
+
+ status = acpi_evaluate_integer(ACPI_HANDLE(&pdev->dev),
+ "_UID", NULL, &id);
+ if (ACPI_FAILURE(status))
+ return -EINVAL;
+
+ hha_pmu->index_id = id;
+
+ /*
+ * Use SCCL_ID and UID to identify the HHA PMU, while
+ * SCCL_ID is in MPIDR[aff2].
+ */
+ if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
+ &hha_pmu->sccl_id)) {
+ dev_err(&pdev->dev, "Can not read hha sccl-id!\n");
+ return -EINVAL;
+ }
+ /* HHA PMUs only share the same SCCL */
+ hha_pmu->ccl_id = -1;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ hha_pmu->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(hha_pmu->base)) {
+ dev_err(&pdev->dev, "ioremap failed for hha_pmu resource\n");
+ return PTR_ERR(hha_pmu->base);
+ }
+
+ return 0;
+}
+
+static struct attribute *hisi_hha_pmu_format_attr[] = {
+ HISI_PMU_FORMAT_ATTR(event, "config:0-7"),
+ NULL,
+};
+
+static const struct attribute_group hisi_hha_pmu_format_group = {
+ .name = "format",
+ .attrs = hisi_hha_pmu_format_attr,
+};
+
+static struct attribute *hisi_hha_pmu_events_attr[] = {
+ HISI_PMU_EVENT_ATTR(rx_ops_num, 0x00),
+ HISI_PMU_EVENT_ATTR(rx_outer, 0x01),
+ HISI_PMU_EVENT_ATTR(rx_sccl, 0x02),
+ HISI_PMU_EVENT_ATTR(rx_ccix, 0x03),
+ HISI_PMU_EVENT_ATTR(rx_wbi, 0x04),
+ HISI_PMU_EVENT_ATTR(rx_wbip, 0x05),
+ HISI_PMU_EVENT_ATTR(rx_wtistash, 0x11),
+ HISI_PMU_EVENT_ATTR(rd_ddr_64b, 0x1c),
+ HISI_PMU_EVENT_ATTR(wr_dr_64b, 0x1d),
+ HISI_PMU_EVENT_ATTR(rd_ddr_128b, 0x1e),
+ HISI_PMU_EVENT_ATTR(wr_ddr_128b, 0x1f),
+ HISI_PMU_EVENT_ATTR(spill_num, 0x20),
+ HISI_PMU_EVENT_ATTR(spill_success, 0x21),
+ HISI_PMU_EVENT_ATTR(bi_num, 0x23),
+ HISI_PMU_EVENT_ATTR(mediated_num, 0x32),
+ HISI_PMU_EVENT_ATTR(tx_snp_num, 0x33),
+ HISI_PMU_EVENT_ATTR(tx_snp_outer, 0x34),
+ HISI_PMU_EVENT_ATTR(tx_snp_ccix, 0x35),
+ HISI_PMU_EVENT_ATTR(rx_snprspdata, 0x38),
+ HISI_PMU_EVENT_ATTR(rx_snprsp_outer, 0x3c),
+ HISI_PMU_EVENT_ATTR(sdir-lookup, 0x40),
+ HISI_PMU_EVENT_ATTR(edir-lookup, 0x41),
+ HISI_PMU_EVENT_ATTR(sdir-hit, 0x42),
+ HISI_PMU_EVENT_ATTR(edir-hit, 0x43),
+ HISI_PMU_EVENT_ATTR(sdir-home-migrate, 0x4c),
+ HISI_PMU_EVENT_ATTR(edir-home-migrate, 0x4d),
+ NULL,
+};
+
+static const struct attribute_group hisi_hha_pmu_events_group = {
+ .name = "events",
+ .attrs = hisi_hha_pmu_events_attr,
+};
+
+static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
+
+static struct attribute *hisi_hha_pmu_cpumask_attrs[] = {
+ &dev_attr_cpumask.attr,
+ NULL,
+};
+
+static const struct attribute_group hisi_hha_pmu_cpumask_attr_group = {
+ .attrs = hisi_hha_pmu_cpumask_attrs,
+};
+
+static const struct attribute_group *hisi_hha_pmu_attr_groups[] = {
+ &hisi_hha_pmu_format_group,
+ &hisi_hha_pmu_events_group,
+ &hisi_hha_pmu_cpumask_attr_group,
+ NULL,
+};
+
+static const struct hisi_uncore_ops hisi_uncore_hha_ops = {
+ .write_evtype = hisi_hha_pmu_write_evtype,
+ .get_event_idx = hisi_uncore_pmu_get_event_idx,
+ .start_counters = hisi_hha_pmu_start_counters,
+ .stop_counters = hisi_hha_pmu_stop_counters,
+ .enable_counter = hisi_hha_pmu_enable_counter,
+ .disable_counter = hisi_hha_pmu_disable_counter,
+ .enable_counter_int = hisi_hha_pmu_enable_counter_int,
+ .disable_counter_int = hisi_hha_pmu_disable_counter_int,
+ .write_counter = hisi_hha_pmu_write_counter,
+ .read_counter = hisi_hha_pmu_read_counter,
+};
+
+static int hisi_hha_pmu_dev_probe(struct platform_device *pdev,
+ struct hisi_pmu *hha_pmu)
+{
+ int ret;
+
+ ret = hisi_hha_pmu_init_data(pdev, hha_pmu);
+ if (ret)
+ return ret;
+
+ ret = hisi_hha_pmu_init_irq(hha_pmu, pdev);
+ if (ret)
+ return ret;
+
+ hha_pmu->num_counters = HHA_NR_COUNTERS;
+ hha_pmu->counter_bits = 48;
+ hha_pmu->ops = &hisi_uncore_hha_ops;
+ hha_pmu->dev = &pdev->dev;
+ hha_pmu->on_cpu = -1;
+ hha_pmu->check_event = 0x65;
+
+ return 0;
+}
+
+static int hisi_hha_pmu_probe(struct platform_device *pdev)
+{
+ struct hisi_pmu *hha_pmu;
+ char *name;
+ int ret;
+
+ hha_pmu = devm_kzalloc(&pdev->dev, sizeof(*hha_pmu), GFP_KERNEL);
+ if (!hha_pmu)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, hha_pmu);
+
+ ret = hisi_hha_pmu_dev_probe(pdev, hha_pmu);
+ if (ret)
+ return ret;
+
+ ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE,
+ &hha_pmu->node);
+ if (ret) {
+ dev_err(&pdev->dev, "Error %d registering hotplug\n", ret);
+ return ret;
+ }
+
+ name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_hha%u",
+ hha_pmu->sccl_id, hha_pmu->index_id);
+ hha_pmu->pmu = (struct pmu) {
+ .name = name,
+ .task_ctx_nr = perf_invalid_context,
+ .event_init = hisi_uncore_pmu_event_init,
+ .pmu_enable = hisi_uncore_pmu_enable,
+ .pmu_disable = hisi_uncore_pmu_disable,
+ .add = hisi_uncore_pmu_add,
+ .del = hisi_uncore_pmu_del,
+ .start = hisi_uncore_pmu_start,
+ .stop = hisi_uncore_pmu_stop,
+ .read = hisi_uncore_pmu_read,
+ .attr_groups = hisi_hha_pmu_attr_groups,
+ };
+
+ ret = perf_pmu_register(&hha_pmu->pmu, name, -1);
+ if (ret) {
+ dev_err(hha_pmu->dev, "HHA PMU register failed!\n");
+ cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE,
+ &hha_pmu->node);
+ }
+
+ return ret;
+}
+
+static int hisi_hha_pmu_remove(struct platform_device *pdev)
+{
+ struct hisi_pmu *hha_pmu = platform_get_drvdata(pdev);
+
+ perf_pmu_unregister(&hha_pmu->pmu);
+ cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE,
+ &hha_pmu->node);
+
+ return 0;
+}
+
+static struct platform_driver hisi_hha_pmu_driver = {
+ .driver = {
+ .name = "hisi_hha_pmu",
+ .acpi_match_table = ACPI_PTR(hisi_hha_pmu_acpi_match),
+ },
+ .probe = hisi_hha_pmu_probe,
+ .remove = hisi_hha_pmu_remove,
+};
+
+static int __init hisi_hha_pmu_module_init(void)
+{
+ int ret;
+
+ ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE,
+ "AP_PERF_ARM_HISI_HHA_ONLINE",
+ hisi_uncore_pmu_online_cpu,
+ hisi_uncore_pmu_offline_cpu);
+ if (ret) {
+ pr_err("HHA PMU: Error setup hotplug, ret = %d;\n", ret);
+ return ret;
+ }
+
+ ret = platform_driver_register(&hisi_hha_pmu_driver);
+ if (ret)
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE);
+
+ return ret;
+}
+module_init(hisi_hha_pmu_module_init);
+
+static void __exit hisi_hha_pmu_module_exit(void)
+{
+ platform_driver_unregister(&hisi_hha_pmu_driver);
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_HHA_ONLINE);
+}
+module_exit(hisi_hha_pmu_module_exit);
+
+MODULE_DESCRIPTION("HiSilicon SoC HHA uncore PMU driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Shaokun Zhang <zhangshaokun@hisilicon.com>");
+MODULE_AUTHOR("Anurup M <anurup.m@huawei.com>");
diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
new file mode 100644
index 000000000000..0bde5d919b2e
--- /dev/null
+++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
@@ -0,0 +1,463 @@
+/*
+ * HiSilicon SoC L3C uncore Hardware event counters support
+ *
+ * Copyright (C) 2017 Hisilicon Limited
+ * Author: Anurup M <anurup.m@huawei.com>
+ * Shaokun Zhang <zhangshaokun@hisilicon.com>
+ *
+ * This code is based on the uncore PMUs like arm-cci and arm-ccn.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/acpi.h>
+#include <linux/bug.h>
+#include <linux/cpuhotplug.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/list.h>
+#include <linux/platform_device.h>
+#include <linux/smp.h>
+
+#include "hisi_uncore_pmu.h"
+
+/* L3C register definition */
+#define L3C_PERF_CTRL 0x0408
+#define L3C_INT_MASK 0x0800
+#define L3C_INT_STATUS 0x0808
+#define L3C_INT_CLEAR 0x080c
+#define L3C_EVENT_CTRL 0x1c00
+#define L3C_EVENT_TYPE0 0x1d00
+/*
+ * Each counter is 48-bits and [48:63] are reserved
+ * which are Read-As-Zero and Writes-Ignored.
+ */
+#define L3C_CNTR0_LOWER 0x1e00
+
+/* L3C has 8-counters */
+#define L3C_NR_COUNTERS 0x8
+
+#define L3C_PERF_CTRL_EN 0x20000
+#define L3C_EVTYPE_NONE 0xff
+
+/*
+ * Select the counter register offset using the counter index
+ */
+static u32 hisi_l3c_pmu_get_counter_offset(int cntr_idx)
+{
+ return (L3C_CNTR0_LOWER + (cntr_idx * 8));
+}
+
+static u64 hisi_l3c_pmu_read_counter(struct hisi_pmu *l3c_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 idx = hwc->idx;
+
+ if (!hisi_uncore_pmu_counter_valid(l3c_pmu, idx)) {
+ dev_err(l3c_pmu->dev, "Unsupported event index:%d!\n", idx);
+ return 0;
+ }
+
+ /* Read 64-bits and the upper 16 bits are RAZ */
+ return readq(l3c_pmu->base + hisi_l3c_pmu_get_counter_offset(idx));
+}
+
+static void hisi_l3c_pmu_write_counter(struct hisi_pmu *l3c_pmu,
+ struct hw_perf_event *hwc, u64 val)
+{
+ u32 idx = hwc->idx;
+
+ if (!hisi_uncore_pmu_counter_valid(l3c_pmu, idx)) {
+ dev_err(l3c_pmu->dev, "Unsupported event index:%d!\n", idx);
+ return;
+ }
+
+ /* Write 64-bits and the upper 16 bits are WI */
+ writeq(val, l3c_pmu->base + hisi_l3c_pmu_get_counter_offset(idx));
+}
+
+static void hisi_l3c_pmu_write_evtype(struct hisi_pmu *l3c_pmu, int idx,
+ u32 type)
+{
+ u32 reg, reg_idx, shift, val;
+
+ /*
+ * Select the appropriate event select register(L3C_EVENT_TYPE0/1).
+ * There are 2 event select registers for the 8 hardware counters.
+ * Event code is 8-bits and for the former 4 hardware counters,
+ * L3C_EVENT_TYPE0 is chosen. For the latter 4 hardware counters,
+ * L3C_EVENT_TYPE1 is chosen.
+ */
+ reg = L3C_EVENT_TYPE0 + (idx / 4) * 4;
+ reg_idx = idx % 4;
+ shift = 8 * reg_idx;
+
+ /* Write event code to L3C_EVENT_TYPEx Register */
+ val = readl(l3c_pmu->base + reg);
+ val &= ~(L3C_EVTYPE_NONE << shift);
+ val |= (type << shift);
+ writel(val, l3c_pmu->base + reg);
+}
+
+static void hisi_l3c_pmu_start_counters(struct hisi_pmu *l3c_pmu)
+{
+ u32 val;
+
+ /*
+ * Set perf_enable bit in L3C_PERF_CTRL register to start counting
+ * for all enabled counters.
+ */
+ val = readl(l3c_pmu->base + L3C_PERF_CTRL);
+ val |= L3C_PERF_CTRL_EN;
+ writel(val, l3c_pmu->base + L3C_PERF_CTRL);
+}
+
+static void hisi_l3c_pmu_stop_counters(struct hisi_pmu *l3c_pmu)
+{
+ u32 val;
+
+ /*
+ * Clear perf_enable bit in L3C_PERF_CTRL register to stop counting
+ * for all enabled counters.
+ */
+ val = readl(l3c_pmu->base + L3C_PERF_CTRL);
+ val &= ~(L3C_PERF_CTRL_EN);
+ writel(val, l3c_pmu->base + L3C_PERF_CTRL);
+}
+
+static void hisi_l3c_pmu_enable_counter(struct hisi_pmu *l3c_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Enable counter index in L3C_EVENT_CTRL register */
+ val = readl(l3c_pmu->base + L3C_EVENT_CTRL);
+ val |= (1 << hwc->idx);
+ writel(val, l3c_pmu->base + L3C_EVENT_CTRL);
+}
+
+static void hisi_l3c_pmu_disable_counter(struct hisi_pmu *l3c_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ /* Clear counter index in L3C_EVENT_CTRL register */
+ val = readl(l3c_pmu->base + L3C_EVENT_CTRL);
+ val &= ~(1 << hwc->idx);
+ writel(val, l3c_pmu->base + L3C_EVENT_CTRL);
+}
+
+static void hisi_l3c_pmu_enable_counter_int(struct hisi_pmu *l3c_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ val = readl(l3c_pmu->base + L3C_INT_MASK);
+ /* Write 0 to enable interrupt */
+ val &= ~(1 << hwc->idx);
+ writel(val, l3c_pmu->base + L3C_INT_MASK);
+}
+
+static void hisi_l3c_pmu_disable_counter_int(struct hisi_pmu *l3c_pmu,
+ struct hw_perf_event *hwc)
+{
+ u32 val;
+
+ val = readl(l3c_pmu->base + L3C_INT_MASK);
+ /* Write 1 to mask interrupt */
+ val |= (1 << hwc->idx);
+ writel(val, l3c_pmu->base + L3C_INT_MASK);
+}
+
+static irqreturn_t hisi_l3c_pmu_isr(int irq, void *dev_id)
+{
+ struct hisi_pmu *l3c_pmu = dev_id;
+ struct perf_event *event;
+ unsigned long overflown;
+ int idx;
+
+ /* Read L3C_INT_STATUS register */
+ overflown = readl(l3c_pmu->base + L3C_INT_STATUS);
+ if (!overflown)
+ return IRQ_NONE;
+
+ /*
+ * Find the counter index which overflowed if the bit was set
+ * and handle it.
+ */
+ for_each_set_bit(idx, &overflown, L3C_NR_COUNTERS) {
+ /* Write 1 to clear the IRQ status flag */
+ writel((1 << idx), l3c_pmu->base + L3C_INT_CLEAR);
+
+ /* Get the corresponding event struct */
+ event = l3c_pmu->pmu_events.hw_events[idx];
+ if (!event)
+ continue;
+
+ hisi_uncore_pmu_event_update(event);
+ hisi_uncore_pmu_set_event_period(event);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int hisi_l3c_pmu_init_irq(struct hisi_pmu *l3c_pmu,
+ struct platform_device *pdev)
+{
+ int irq, ret;
+
+ /* Read and init IRQ */
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0) {
+ dev_err(&pdev->dev, "L3C PMU get irq fail; irq:%d\n", irq);
+ return irq;
+ }
+
+ ret = devm_request_irq(&pdev->dev, irq, hisi_l3c_pmu_isr,
+ IRQF_NOBALANCING | IRQF_NO_THREAD,
+ dev_name(&pdev->dev), l3c_pmu);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "Fail to request IRQ:%d ret:%d\n", irq, ret);
+ return ret;
+ }
+
+ l3c_pmu->irq = irq;
+
+ return 0;
+}
+
+static const struct acpi_device_id hisi_l3c_pmu_acpi_match[] = {
+ { "HISI0213", },
+ {},
+};
+MODULE_DEVICE_TABLE(acpi, hisi_l3c_pmu_acpi_match);
+
+static int hisi_l3c_pmu_init_data(struct platform_device *pdev,
+ struct hisi_pmu *l3c_pmu)
+{
+ unsigned long long id;
+ struct resource *res;
+ acpi_status status;
+
+ status = acpi_evaluate_integer(ACPI_HANDLE(&pdev->dev),
+ "_UID", NULL, &id);
+ if (ACPI_FAILURE(status))
+ return -EINVAL;
+
+ l3c_pmu->index_id = id;
+
+ /*
+ * Use the SCCL_ID and CCL_ID to identify the L3C PMU, while
+ * SCCL_ID is in MPIDR[aff2] and CCL_ID is in MPIDR[aff1].
+ */
+ if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
+ &l3c_pmu->sccl_id)) {
+ dev_err(&pdev->dev, "Can not read l3c sccl-id!\n");
+ return -EINVAL;
+ }
+
+ if (device_property_read_u32(&pdev->dev, "hisilicon,ccl-id",
+ &l3c_pmu->ccl_id)) {
+ dev_err(&pdev->dev, "Can not read l3c ccl-id!\n");
+ return -EINVAL;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ l3c_pmu->base = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(l3c_pmu->base)) {
+ dev_err(&pdev->dev, "ioremap failed for l3c_pmu resource\n");
+ return PTR_ERR(l3c_pmu->base);
+ }
+
+ return 0;
+}
+
+static struct attribute *hisi_l3c_pmu_format_attr[] = {
+ HISI_PMU_FORMAT_ATTR(event, "config:0-7"),
+ NULL,
+};
+
+static const struct attribute_group hisi_l3c_pmu_format_group = {
+ .name = "format",
+ .attrs = hisi_l3c_pmu_format_attr,
+};
+
+static struct attribute *hisi_l3c_pmu_events_attr[] = {
+ HISI_PMU_EVENT_ATTR(rd_cpipe, 0x00),
+ HISI_PMU_EVENT_ATTR(wr_cpipe, 0x01),
+ HISI_PMU_EVENT_ATTR(rd_hit_cpipe, 0x02),
+ HISI_PMU_EVENT_ATTR(wr_hit_cpipe, 0x03),
+ HISI_PMU_EVENT_ATTR(victim_num, 0x04),
+ HISI_PMU_EVENT_ATTR(rd_spipe, 0x20),
+ HISI_PMU_EVENT_ATTR(wr_spipe, 0x21),
+ HISI_PMU_EVENT_ATTR(rd_hit_spipe, 0x22),
+ HISI_PMU_EVENT_ATTR(wr_hit_spipe, 0x23),
+ HISI_PMU_EVENT_ATTR(back_invalid, 0x29),
+ HISI_PMU_EVENT_ATTR(retry_cpu, 0x40),
+ HISI_PMU_EVENT_ATTR(retry_ring, 0x41),
+ HISI_PMU_EVENT_ATTR(prefetch_drop, 0x42),
+ NULL,
+};
+
+static const struct attribute_group hisi_l3c_pmu_events_group = {
+ .name = "events",
+ .attrs = hisi_l3c_pmu_events_attr,
+};
+
+static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
+
+static struct attribute *hisi_l3c_pmu_cpumask_attrs[] = {
+ &dev_attr_cpumask.attr,
+ NULL,
+};
+
+static const struct attribute_group hisi_l3c_pmu_cpumask_attr_group = {
+ .attrs = hisi_l3c_pmu_cpumask_attrs,
+};
+
+static const struct attribute_group *hisi_l3c_pmu_attr_groups[] = {
+ &hisi_l3c_pmu_format_group,
+ &hisi_l3c_pmu_events_group,
+ &hisi_l3c_pmu_cpumask_attr_group,
+ NULL,
+};
+
+static const struct hisi_uncore_ops hisi_uncore_l3c_ops = {
+ .write_evtype = hisi_l3c_pmu_write_evtype,
+ .get_event_idx = hisi_uncore_pmu_get_event_idx,
+ .start_counters = hisi_l3c_pmu_start_counters,
+ .stop_counters = hisi_l3c_pmu_stop_counters,
+ .enable_counter = hisi_l3c_pmu_enable_counter,
+ .disable_counter = hisi_l3c_pmu_disable_counter,
+ .enable_counter_int = hisi_l3c_pmu_enable_counter_int,
+ .disable_counter_int = hisi_l3c_pmu_disable_counter_int,
+ .write_counter = hisi_l3c_pmu_write_counter,
+ .read_counter = hisi_l3c_pmu_read_counter,
+};
+
+static int hisi_l3c_pmu_dev_probe(struct platform_device *pdev,
+ struct hisi_pmu *l3c_pmu)
+{
+ int ret;
+
+ ret = hisi_l3c_pmu_init_data(pdev, l3c_pmu);
+ if (ret)
+ return ret;
+
+ ret = hisi_l3c_pmu_init_irq(l3c_pmu, pdev);
+ if (ret)
+ return ret;
+
+ l3c_pmu->num_counters = L3C_NR_COUNTERS;
+ l3c_pmu->counter_bits = 48;
+ l3c_pmu->ops = &hisi_uncore_l3c_ops;
+ l3c_pmu->dev = &pdev->dev;
+ l3c_pmu->on_cpu = -1;
+ l3c_pmu->check_event = 0x59;
+
+ return 0;
+}
+
+static int hisi_l3c_pmu_probe(struct platform_device *pdev)
+{
+ struct hisi_pmu *l3c_pmu;
+ char *name;
+ int ret;
+
+ l3c_pmu = devm_kzalloc(&pdev->dev, sizeof(*l3c_pmu), GFP_KERNEL);
+ if (!l3c_pmu)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, l3c_pmu);
+
+ ret = hisi_l3c_pmu_dev_probe(pdev, l3c_pmu);
+ if (ret)
+ return ret;
+
+ ret = cpuhp_state_add_instance(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
+ &l3c_pmu->node);
+ if (ret) {
+ dev_err(&pdev->dev, "Error %d registering hotplug\n", ret);
+ return ret;
+ }
+
+ name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_l3c%u",
+ l3c_pmu->sccl_id, l3c_pmu->index_id);
+ l3c_pmu->pmu = (struct pmu) {
+ .name = name,
+ .task_ctx_nr = perf_invalid_context,
+ .event_init = hisi_uncore_pmu_event_init,
+ .pmu_enable = hisi_uncore_pmu_enable,
+ .pmu_disable = hisi_uncore_pmu_disable,
+ .add = hisi_uncore_pmu_add,
+ .del = hisi_uncore_pmu_del,
+ .start = hisi_uncore_pmu_start,
+ .stop = hisi_uncore_pmu_stop,
+ .read = hisi_uncore_pmu_read,
+ .attr_groups = hisi_l3c_pmu_attr_groups,
+ };
+
+ ret = perf_pmu_register(&l3c_pmu->pmu, name, -1);
+ if (ret) {
+ dev_err(l3c_pmu->dev, "L3C PMU register failed!\n");
+ cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
+ &l3c_pmu->node);
+ }
+
+ return ret;
+}
+
+static int hisi_l3c_pmu_remove(struct platform_device *pdev)
+{
+ struct hisi_pmu *l3c_pmu = platform_get_drvdata(pdev);
+
+ perf_pmu_unregister(&l3c_pmu->pmu);
+ cpuhp_state_remove_instance(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
+ &l3c_pmu->node);
+
+ return 0;
+}
+
+static struct platform_driver hisi_l3c_pmu_driver = {
+ .driver = {
+ .name = "hisi_l3c_pmu",
+ .acpi_match_table = ACPI_PTR(hisi_l3c_pmu_acpi_match),
+ },
+ .probe = hisi_l3c_pmu_probe,
+ .remove = hisi_l3c_pmu_remove,
+};
+
+static int __init hisi_l3c_pmu_module_init(void)
+{
+ int ret;
+
+ ret = cpuhp_setup_state_multi(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE,
+ "AP_PERF_ARM_HISI_L3_ONLINE",
+ hisi_uncore_pmu_online_cpu,
+ hisi_uncore_pmu_offline_cpu);
+ if (ret) {
+ pr_err("L3C PMU: Error setup hotplug, ret = %d\n", ret);
+ return ret;
+ }
+
+ ret = platform_driver_register(&hisi_l3c_pmu_driver);
+ if (ret)
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE);
+
+ return ret;
+}
+module_init(hisi_l3c_pmu_module_init);
+
+static void __exit hisi_l3c_pmu_module_exit(void)
+{
+ platform_driver_unregister(&hisi_l3c_pmu_driver);
+ cpuhp_remove_multi_state(CPUHP_AP_PERF_ARM_HISI_L3_ONLINE);
+}
+module_exit(hisi_l3c_pmu_module_exit);
+
+MODULE_DESCRIPTION("HiSilicon SoC L3C uncore PMU driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Anurup M <anurup.m@huawei.com>");
+MODULE_AUTHOR("Shaokun Zhang <zhangshaokun@hisilicon.com>");
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
new file mode 100644
index 000000000000..7ed24b954422
--- /dev/null
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -0,0 +1,447 @@
+/*
+ * HiSilicon SoC Hardware event counters support
+ *
+ * Copyright (C) 2017 Hisilicon Limited
+ * Author: Anurup M <anurup.m@huawei.com>
+ * Shaokun Zhang <zhangshaokun@hisilicon.com>
+ *
+ * This code is based on the uncore PMUs like arm-cci and arm-ccn.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/bitmap.h>
+#include <linux/bitops.h>
+#include <linux/bug.h>
+#include <linux/err.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+
+#include <asm/local64.h>
+
+#include "hisi_uncore_pmu.h"
+
+#define HISI_GET_EVENTID(ev) (ev->hw.config_base & 0xff)
+#define HISI_MAX_PERIOD(nr) (BIT_ULL(nr) - 1)
+
+/*
+ * PMU format attributes
+ */
+ssize_t hisi_format_sysfs_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct dev_ext_attribute *eattr;
+
+ eattr = container_of(attr, struct dev_ext_attribute, attr);
+
+ return sprintf(buf, "%s\n", (char *)eattr->var);
+}
+
+/*
+ * PMU event attributes
+ */
+ssize_t hisi_event_sysfs_show(struct device *dev,
+ struct device_attribute *attr, char *page)
+{
+ struct dev_ext_attribute *eattr;
+
+ eattr = container_of(attr, struct dev_ext_attribute, attr);
+
+ return sprintf(page, "config=0x%lx\n", (unsigned long)eattr->var);
+}
+
+/*
+ * sysfs cpumask attributes. For uncore PMU, we only have a single CPU to show
+ */
+ssize_t hisi_cpumask_sysfs_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hisi_pmu *hisi_pmu = to_hisi_pmu(dev_get_drvdata(dev));
+
+ return sprintf(buf, "%d\n", hisi_pmu->on_cpu);
+}
+
+static bool hisi_validate_event_group(struct perf_event *event)
+{
+ struct perf_event *sibling, *leader = event->group_leader;
+ struct hisi_pmu *hisi_pmu = to_hisi_pmu(event->pmu);
+ /* Include count for the event */
+ int counters = 1;
+
+ if (!is_software_event(leader)) {
+ /*
+ * We must NOT create groups containing mixed PMUs, although
+ * software events are acceptable
+ */
+ if (leader->pmu != event->pmu)
+ return false;
+
+ /* Increment counter for the leader */
+ if (leader != event)
+ counters++;
+ }
+
+ list_for_each_entry(sibling, &event->group_leader->sibling_list,
+ group_entry) {
+ if (is_software_event(sibling))
+ continue;
+ if (sibling->pmu != event->pmu)
+ return false;
+ /* Increment counter for each sibling */
+ counters++;
+ }
+
+ /* The group can not count events more than the counters in the HW */
+ return counters <= hisi_pmu->num_counters;
+}
+
+int hisi_uncore_pmu_counter_valid(struct hisi_pmu *hisi_pmu, int idx)
+{
+ return idx >= 0 && idx < hisi_pmu->num_counters;
+}
+
+int hisi_uncore_pmu_get_event_idx(struct perf_event *event)
+{
+ struct hisi_pmu *hisi_pmu = to_hisi_pmu(event->pmu);
+ unsigned long *used_mask = hisi_pmu->pmu_events.used_mask;
+ u32 num_counters = hisi_pmu->num_counters;
+ int idx;
+
+ idx = find_first_zero_bit(used_mask, num_counters);
+ if (idx == num_counters)
+ return -EAGAIN;
+
+ set_bit(idx, used_mask);
+
+ return idx;
+}
+
+static void hisi_uncore_pmu_clear_event_idx(struct hisi_pmu *hisi_pmu, int idx)
+{
+ if (!hisi_uncore_pmu_counter_valid(hisi_pmu, idx)) {
+ dev_err(hisi_pmu->dev, "Unsupported event index:%d!\n", idx);
+ return;
+ }
+
+ clear_bit(idx, hisi_pmu->pmu_events.used_mask);
+}
+
+int hisi_uncore_pmu_event_init(struct perf_event *event)
+{
+ struct hw_perf_event *hwc = &event->hw;
+ struct hisi_pmu *hisi_pmu;
+
+ if (event->attr.type != event->pmu->type)
+ return -ENOENT;
+
+ /*
+ * We do not support sampling as the counters are all
+ * shared by all CPU cores in a CPU die(SCCL). Also we
+ * do not support attach to a task(per-process mode)
+ */
+ if (is_sampling_event(event) || event->attach_state & PERF_ATTACH_TASK)
+ return -EOPNOTSUPP;
+
+ /* counters do not have these bits */
+ if (event->attr.exclude_user ||
+ event->attr.exclude_kernel ||
+ event->attr.exclude_host ||
+ event->attr.exclude_guest ||
+ event->attr.exclude_hv ||
+ event->attr.exclude_idle)
+ return -EINVAL;
+
+ /*
+ * The uncore counters not specific to any CPU, so cannot
+ * support per-task
+ */
+ if (event->cpu < 0)
+ return -EINVAL;
+
+ /*
+ * Validate if the events in group does not exceed the
+ * available counters in hardware.
+ */
+ if (!hisi_validate_event_group(event))
+ return -EINVAL;
+
+ hisi_pmu = to_hisi_pmu(event->pmu);
+ if (event->attr.config > hisi_pmu->check_event)
+ return -EINVAL;
+
+ if (hisi_pmu->on_cpu == -1)
+ return -EINVAL;
+ /*
+ * 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.
+ */
+ hwc->idx = -1;
+ hwc->config_base = event->attr.config;
+
+ /* Enforce to use the same CPU for all events in this PMU */
+ event->cpu = hisi_pmu->on_cpu;
+
+ return 0;
+}
+
+/*
+ * Set the counter to count the event that we're interested in,
+ * and enable interrupt and counter.
+ */
+static void hisi_uncore_pmu_enable_event(struct perf_event *event)
+{
+ struct hisi_pmu *hisi_pmu = to_hisi_pmu(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+
+ hisi_pmu->ops->write_evtype(hisi_pmu, hwc->idx,
+ HISI_GET_EVENTID(event));
+
+ hisi_pmu->ops->enable_counter_int(hisi_pmu, hwc);
+ hisi_pmu->ops->enable_counter(hisi_pmu, hwc);
+}
+
+/*
+ * Disable counter and interrupt.
+ */
+static void hisi_uncore_pmu_disable_event(struct perf_event *event)
+{
+ struct hisi_pmu *hisi_pmu = to_hisi_pmu(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+
+ hisi_pmu->ops->disable_counter(hisi_pmu, hwc);
+ hisi_pmu->ops->disable_counter_int(hisi_pmu, hwc);
+}
+
+void hisi_uncore_pmu_set_event_period(struct perf_event *event)
+{
+ struct hisi_pmu *hisi_pmu = to_hisi_pmu(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+
+ /*
+ * The HiSilicon PMU counters support 32 bits or 48 bits, depending on
+ * the PMU. We reduce it to 2^(counter_bits - 1) to account for the
+ * extreme interrupt latency. So we could hopefully handle the overflow
+ * interrupt before another 2^(counter_bits - 1) events occur and the
+ * counter overtakes its previous value.
+ */
+ u64 val = BIT_ULL(hisi_pmu->counter_bits - 1);
+
+ local64_set(&hwc->prev_count, val);
+ /* Write start value to the hardware event counter */
+ hisi_pmu->ops->write_counter(hisi_pmu, hwc, val);
+}
+
+void hisi_uncore_pmu_event_update(struct perf_event *event)
+{
+ struct hisi_pmu *hisi_pmu = to_hisi_pmu(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+ u64 delta, prev_raw_count, new_raw_count;
+
+ do {
+ /* Read the count from the counter register */
+ new_raw_count = hisi_pmu->ops->read_counter(hisi_pmu, hwc);
+ prev_raw_count = local64_read(&hwc->prev_count);
+ } while (local64_cmpxchg(&hwc->prev_count, prev_raw_count,
+ new_raw_count) != prev_raw_count);
+ /*
+ * compute the delta
+ */
+ delta = (new_raw_count - prev_raw_count) &
+ HISI_MAX_PERIOD(hisi_pmu->counter_bits);
+ local64_add(delta, &event->count);
+}
+
+void hisi_uncore_pmu_start(struct perf_event *event, int flags)
+{
+ struct hisi_pmu *hisi_pmu = to_hisi_pmu(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+
+ if (WARN_ON_ONCE(!(hwc->state & PERF_HES_STOPPED)))
+ return;
+
+ WARN_ON_ONCE(!(hwc->state & PERF_HES_UPTODATE));
+ hwc->state = 0;
+ hisi_uncore_pmu_set_event_period(event);
+
+ if (flags & PERF_EF_RELOAD) {
+ u64 prev_raw_count = local64_read(&hwc->prev_count);
+
+ hisi_pmu->ops->write_counter(hisi_pmu, hwc, prev_raw_count);
+ }
+
+ hisi_uncore_pmu_enable_event(event);
+ perf_event_update_userpage(event);
+}
+
+void hisi_uncore_pmu_stop(struct perf_event *event, int flags)
+{
+ struct hw_perf_event *hwc = &event->hw;
+
+ hisi_uncore_pmu_disable_event(event);
+ WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED);
+ hwc->state |= PERF_HES_STOPPED;
+
+ if (hwc->state & PERF_HES_UPTODATE)
+ return;
+
+ /* Read hardware counter and update the perf counter statistics */
+ hisi_uncore_pmu_event_update(event);
+ hwc->state |= PERF_HES_UPTODATE;
+}
+
+int hisi_uncore_pmu_add(struct perf_event *event, int flags)
+{
+ struct hisi_pmu *hisi_pmu = to_hisi_pmu(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+ int idx;
+
+ hwc->state = PERF_HES_STOPPED | PERF_HES_UPTODATE;
+
+ /* Get an available counter index for counting */
+ idx = hisi_pmu->ops->get_event_idx(event);
+ if (idx < 0)
+ return idx;
+
+ event->hw.idx = idx;
+ hisi_pmu->pmu_events.hw_events[idx] = event;
+
+ if (flags & PERF_EF_START)
+ hisi_uncore_pmu_start(event, PERF_EF_RELOAD);
+
+ return 0;
+}
+
+void hisi_uncore_pmu_del(struct perf_event *event, int flags)
+{
+ struct hisi_pmu *hisi_pmu = to_hisi_pmu(event->pmu);
+ struct hw_perf_event *hwc = &event->hw;
+
+ hisi_uncore_pmu_stop(event, PERF_EF_UPDATE);
+ hisi_uncore_pmu_clear_event_idx(hisi_pmu, hwc->idx);
+ perf_event_update_userpage(event);
+ hisi_pmu->pmu_events.hw_events[hwc->idx] = NULL;
+}
+
+void hisi_uncore_pmu_read(struct perf_event *event)
+{
+ /* Read hardware counter and update the perf counter statistics */
+ hisi_uncore_pmu_event_update(event);
+}
+
+void hisi_uncore_pmu_enable(struct pmu *pmu)
+{
+ struct hisi_pmu *hisi_pmu = to_hisi_pmu(pmu);
+ int enabled = bitmap_weight(hisi_pmu->pmu_events.used_mask,
+ hisi_pmu->num_counters);
+
+ if (!enabled)
+ return;
+
+ hisi_pmu->ops->start_counters(hisi_pmu);
+}
+
+void hisi_uncore_pmu_disable(struct pmu *pmu)
+{
+ struct hisi_pmu *hisi_pmu = to_hisi_pmu(pmu);
+
+ hisi_pmu->ops->stop_counters(hisi_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.
+ */
+static void hisi_read_sccl_and_ccl_id(int *sccl_id, int *ccl_id)
+{
+ u64 mpidr = read_cpuid_mpidr();
+
+ if (mpidr & MPIDR_MT_BITMASK) {
+ if (sccl_id)
+ *sccl_id = MPIDR_AFFINITY_LEVEL(mpidr, 3);
+ if (ccl_id)
+ *ccl_id = MPIDR_AFFINITY_LEVEL(mpidr, 2);
+ } else {
+ if (sccl_id)
+ *sccl_id = MPIDR_AFFINITY_LEVEL(mpidr, 2);
+ if (ccl_id)
+ *ccl_id = MPIDR_AFFINITY_LEVEL(mpidr, 1);
+ }
+}
+
+/*
+ * Check whether the CPU is associated with this uncore PMU
+ */
+static bool hisi_pmu_cpu_is_associated_pmu(struct hisi_pmu *hisi_pmu)
+{
+ int sccl_id, ccl_id;
+
+ if (hisi_pmu->ccl_id == -1) {
+ /* If CCL_ID is -1, the PMU only shares the same SCCL */
+ hisi_read_sccl_and_ccl_id(&sccl_id, NULL);
+
+ return sccl_id == hisi_pmu->sccl_id;
+ }
+
+ hisi_read_sccl_and_ccl_id(&sccl_id, &ccl_id);
+
+ return sccl_id == hisi_pmu->sccl_id && ccl_id == hisi_pmu->ccl_id;
+}
+
+int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node)
+{
+ struct hisi_pmu *hisi_pmu = hlist_entry_safe(node, struct hisi_pmu,
+ node);
+
+ if (!hisi_pmu_cpu_is_associated_pmu(hisi_pmu))
+ return 0;
+
+ cpumask_set_cpu(cpu, &hisi_pmu->associated_cpus);
+
+ /* If another CPU is already managing this PMU, simply return. */
+ if (hisi_pmu->on_cpu != -1)
+ return 0;
+
+ /* Use this CPU in cpumask for event counting */
+ hisi_pmu->on_cpu = cpu;
+
+ /* Overflow interrupt also should use the same CPU */
+ WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(cpu)));
+
+ return 0;
+}
+
+int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
+{
+ struct hisi_pmu *hisi_pmu = hlist_entry_safe(node, struct hisi_pmu,
+ node);
+ cpumask_t pmu_online_cpus;
+ unsigned int target;
+
+ if (!cpumask_test_and_clear_cpu(cpu, &hisi_pmu->associated_cpus))
+ return 0;
+
+ /* Nothing to do if this CPU doesn't own the PMU */
+ if (hisi_pmu->on_cpu != cpu)
+ return 0;
+
+ /* Give up ownership of the PMU */
+ hisi_pmu->on_cpu = -1;
+
+ /* Choose a new CPU to migrate ownership of the PMU to */
+ cpumask_and(&pmu_online_cpus, &hisi_pmu->associated_cpus,
+ cpu_online_mask);
+ target = cpumask_any_but(&pmu_online_cpus, cpu);
+ if (target >= nr_cpu_ids)
+ return 0;
+
+ perf_pmu_migrate_context(&hisi_pmu->pmu, cpu, target);
+ /* Use this CPU for event counting */
+ hisi_pmu->on_cpu = target;
+ WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(target)));
+
+ return 0;
+}
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisilicon/hisi_uncore_pmu.h
new file mode 100644
index 000000000000..f21226a0e9c6
--- /dev/null
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.h
@@ -0,0 +1,102 @@
+/*
+ * HiSilicon SoC Hardware event counters support
+ *
+ * Copyright (C) 2017 Hisilicon Limited
+ * Author: Anurup M <anurup.m@huawei.com>
+ * Shaokun Zhang <zhangshaokun@hisilicon.com>
+ *
+ * This code is based on the uncore PMUs like arm-cci and arm-ccn.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __HISI_UNCORE_PMU_H__
+#define __HISI_UNCORE_PMU_H__
+
+#include <linux/cpumask.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/perf_event.h>
+#include <linux/types.h>
+
+#undef pr_fmt
+#define pr_fmt(fmt) "hisi_pmu: " fmt
+
+#define HISI_MAX_COUNTERS 0x10
+#define to_hisi_pmu(p) (container_of(p, struct hisi_pmu, pmu))
+
+#define HISI_PMU_ATTR(_name, _func, _config) \
+ (&((struct dev_ext_attribute[]) { \
+ { __ATTR(_name, 0444, _func, NULL), (void *)_config } \
+ })[0].attr.attr)
+
+#define HISI_PMU_FORMAT_ATTR(_name, _config) \
+ HISI_PMU_ATTR(_name, hisi_format_sysfs_show, (void *)_config)
+#define HISI_PMU_EVENT_ATTR(_name, _config) \
+ HISI_PMU_ATTR(_name, hisi_event_sysfs_show, (unsigned long)_config)
+
+struct hisi_pmu;
+
+struct hisi_uncore_ops {
+ void (*write_evtype)(struct hisi_pmu *, int, u32);
+ int (*get_event_idx)(struct perf_event *);
+ u64 (*read_counter)(struct hisi_pmu *, struct hw_perf_event *);
+ void (*write_counter)(struct hisi_pmu *, struct hw_perf_event *, u64);
+ void (*enable_counter)(struct hisi_pmu *, struct hw_perf_event *);
+ void (*disable_counter)(struct hisi_pmu *, struct hw_perf_event *);
+ void (*enable_counter_int)(struct hisi_pmu *, struct hw_perf_event *);
+ void (*disable_counter_int)(struct hisi_pmu *, struct hw_perf_event *);
+ void (*start_counters)(struct hisi_pmu *);
+ void (*stop_counters)(struct hisi_pmu *);
+};
+
+struct hisi_pmu_hwevents {
+ struct perf_event *hw_events[HISI_MAX_COUNTERS];
+ DECLARE_BITMAP(used_mask, HISI_MAX_COUNTERS);
+};
+
+/* Generic pmu struct for different pmu types */
+struct hisi_pmu {
+ struct pmu pmu;
+ const struct hisi_uncore_ops *ops;
+ struct hisi_pmu_hwevents pmu_events;
+ /* associated_cpus: All CPUs associated with the PMU */
+ cpumask_t associated_cpus;
+ /* CPU used for counting */
+ int on_cpu;
+ int irq;
+ struct device *dev;
+ struct hlist_node node;
+ int sccl_id;
+ int ccl_id;
+ void __iomem *base;
+ /* the ID of the PMU modules */
+ u32 index_id;
+ int num_counters;
+ int counter_bits;
+ /* check event code range */
+ int check_event;
+};
+
+int hisi_uncore_pmu_counter_valid(struct hisi_pmu *hisi_pmu, int idx);
+int hisi_uncore_pmu_get_event_idx(struct perf_event *event);
+void hisi_uncore_pmu_read(struct perf_event *event);
+int hisi_uncore_pmu_add(struct perf_event *event, int flags);
+void hisi_uncore_pmu_del(struct perf_event *event, int flags);
+void hisi_uncore_pmu_start(struct perf_event *event, int flags);
+void hisi_uncore_pmu_stop(struct perf_event *event, int flags);
+void hisi_uncore_pmu_set_event_period(struct perf_event *event);
+void hisi_uncore_pmu_event_update(struct perf_event *event);
+int hisi_uncore_pmu_event_init(struct perf_event *event);
+void hisi_uncore_pmu_enable(struct pmu *pmu);
+void hisi_uncore_pmu_disable(struct pmu *pmu);
+ssize_t hisi_event_sysfs_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+ssize_t hisi_format_sysfs_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+ssize_t hisi_cpumask_sysfs_show(struct device *dev,
+ struct device_attribute *attr, char *buf);
+int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node);
+int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node);
+#endif /* __HISI_UNCORE_PMU_H__ */
diff --git a/drivers/perf/qcom_l2_pmu.c b/drivers/perf/qcom_l2_pmu.c
index b242cce10468..4fdc8486a8e4 100644
--- a/drivers/perf/qcom_l2_pmu.c
+++ b/drivers/perf/qcom_l2_pmu.c
@@ -92,6 +92,21 @@
#define reg_idx(reg, i) (((i) * IA_L2_REG_OFFSET) + reg##_BASE)
+/*
+ * Events
+ */
+#define L2_EVENT_CYCLES 0xfe
+#define L2_EVENT_DCACHE_OPS 0x400
+#define L2_EVENT_ICACHE_OPS 0x401
+#define L2_EVENT_TLBI 0x402
+#define L2_EVENT_BARRIERS 0x403
+#define L2_EVENT_TOTAL_READS 0x405
+#define L2_EVENT_TOTAL_WRITES 0x406
+#define L2_EVENT_TOTAL_REQUESTS 0x407
+#define L2_EVENT_LDREX 0x420
+#define L2_EVENT_STREX 0x421
+#define L2_EVENT_CLREX 0x422
+
static DEFINE_RAW_SPINLOCK(l2_access_lock);
/**
@@ -700,9 +715,12 @@ static struct attribute_group l2_cache_pmu_cpumask_group = {
/* CCG format for perf RAW codes. */
PMU_FORMAT_ATTR(l2_code, "config:4-11");
PMU_FORMAT_ATTR(l2_group, "config:0-3");
+PMU_FORMAT_ATTR(event, "config:0-11");
+
static struct attribute *l2_cache_pmu_formats[] = {
&format_attr_l2_code.attr,
&format_attr_l2_group.attr,
+ &format_attr_event.attr,
NULL,
};
@@ -711,9 +729,45 @@ static struct attribute_group l2_cache_pmu_format_group = {
.attrs = l2_cache_pmu_formats,
};
+static ssize_t l2cache_pmu_event_show(struct device *dev,
+ struct device_attribute *attr, char *page)
+{
+ struct perf_pmu_events_attr *pmu_attr;
+
+ pmu_attr = container_of(attr, struct perf_pmu_events_attr, attr);
+ return sprintf(page, "event=0x%02llx\n", pmu_attr->id);
+}
+
+#define L2CACHE_EVENT_ATTR(_name, _id) \
+ (&((struct perf_pmu_events_attr[]) { \
+ { .attr = __ATTR(_name, 0444, l2cache_pmu_event_show, NULL), \
+ .id = _id, } \
+ })[0].attr.attr)
+
+static struct attribute *l2_cache_pmu_events[] = {
+ L2CACHE_EVENT_ATTR(cycles, L2_EVENT_CYCLES),
+ L2CACHE_EVENT_ATTR(dcache-ops, L2_EVENT_DCACHE_OPS),
+ L2CACHE_EVENT_ATTR(icache-ops, L2_EVENT_ICACHE_OPS),
+ L2CACHE_EVENT_ATTR(tlbi, L2_EVENT_TLBI),
+ L2CACHE_EVENT_ATTR(barriers, L2_EVENT_BARRIERS),
+ L2CACHE_EVENT_ATTR(total-reads, L2_EVENT_TOTAL_READS),
+ L2CACHE_EVENT_ATTR(total-writes, L2_EVENT_TOTAL_WRITES),
+ L2CACHE_EVENT_ATTR(total-requests, L2_EVENT_TOTAL_REQUESTS),
+ L2CACHE_EVENT_ATTR(ldrex, L2_EVENT_LDREX),
+ L2CACHE_EVENT_ATTR(strex, L2_EVENT_STREX),
+ L2CACHE_EVENT_ATTR(clrex, L2_EVENT_CLREX),
+ NULL
+};
+
+static struct attribute_group l2_cache_pmu_events_group = {
+ .name = "events",
+ .attrs = l2_cache_pmu_events,
+};
+
static const struct attribute_group *l2_cache_pmu_attr_grps[] = {
&l2_cache_pmu_format_group,
&l2_cache_pmu_cpumask_group,
+ &l2_cache_pmu_events_group,
NULL,
};
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