[PATCH v2 0/8] Refactor the common parts to the HiSilicon Uncore PMU core and cleanups

[PATCH v2 0/8] Refactor the common parts to the HiSilicon Uncore PMU core and cleanups

[Yicong Yang]

From: Yicong Yang <yangyicong@hisilicon.com>

This series mainly contains the refactor of the HiSilicon Uncore PMU by
extracting the common parts from each drivers into the core:
- the retrieving of the PMU topology ID
- the common sysfs attributes like cpumask and identifier

In order to achieve this, we need to do below preparation:
- improve the detection of associated CPUs for PMUs locates on a SICL
- maintain the topology information in a dedicated data structure
- provides a generic implementation of cpumask/identifier attributes

Besides also include below changes/cleanups in this patchset
- add one new sysfs attributes for better describing the topology information
  of the associated CPUs of the PMU.
- define a symbol namespace for HiSilicon Uncore PMUs to avoid pollute the
  common ones
- two minor nonfunctional cleanups of DDRC PMU

Changes since v1:
Address Jonathan's comments and add tags for some patches
- Provide a generic cpumask/identifier attribute group
- refine the comments/commit as suggested
Link: https://lore.kernel.org/linux-arm-kernel/20241018095745.57057-1-yangyicong@huawei.com/

Junhao He (2):
  drivers/perf: hisi: Fix incorrect variable name "hha_pmu" in DDRC PMU
    driver
  drivers/perf: hisi: Delete redundant blank line of DDRC PMU

Yicong Yang (6):
  drivers/perf: hisi: Define a symbol namespace for HiSilicon Uncore
    PMUs
  drivers/perf: hisi: Improve the detection of associated CPUs
  drivers/perf: hisi: Extract topology information to a separate
    structure
  drivers/perf: hisi: Add a common function to retrieve topology from
    firmware
  drivers/perf: hisi: Provide a generic implementation of
    cpumask/identifier
  drivers/perf: hisi: Export associated CPUs of each PMU through sysfs

 Documentation/admin-guide/perf/hisi-pmu.rst   |   5 +-
 drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c  |  42 +---
 drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c |  61 ++----
 drivers/perf/hisilicon/hisi_uncore_hha_pmu.c  |  49 ++---
 drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c  |  44 ++---
 drivers/perf/hisilicon/hisi_uncore_pa_pmu.c   |  53 ++---
 drivers/perf/hisilicon/hisi_uncore_pmu.c      | 182 ++++++++++++++----
 drivers/perf/hisilicon/hisi_uncore_pmu.h      |  48 ++++-
 drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c |  43 +----
 drivers/perf/hisilicon/hisi_uncore_uc_pmu.c   |  45 ++---
 10 files changed, 270 insertions(+), 302 deletions(-)

-- 
2.24.0

[PATCH v2 1/8] drivers/perf: hisi: Define a symbol namespace for HiSilicon Uncore PMUs

[Yicong Yang]

From: Yicong Yang <yangyicong@hisilicon.com>

The HiSilicon Uncore PMU framework implements some common functions
and exported them to the drivers. Use a specific HISI_PMU namespace
for the exported symbols to avoid pollute the generic ones.

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
---
 drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c  |  1 +
 drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c |  1 +
 drivers/perf/hisilicon/hisi_uncore_hha_pmu.c  |  1 +
 drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c  |  1 +
 drivers/perf/hisilicon/hisi_uncore_pa_pmu.c   |  1 +
 drivers/perf/hisilicon/hisi_uncore_pmu.c      | 36 +++++++++----------
 drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c |  1 +
 drivers/perf/hisilicon/hisi_uncore_uc_pmu.c   |  1 +
 8 files changed, 25 insertions(+), 18 deletions(-)

diff --git a/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c b/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
index 0e923f94fa5b..710c1f92fef6 100644
--- a/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
@@ -389,6 +389,7 @@ static void __exit hisi_cpa_pmu_module_exit(void)
 }
 module_exit(hisi_cpa_pmu_module_exit);
 
+MODULE_IMPORT_NS(HISI_PMU);
 MODULE_DESCRIPTION("HiSilicon SoC CPA PMU driver");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Qi Liu <liuqi115@huawei.com>");
diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
index b804e3738113..56f15e9775bd 100644
--- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
@@ -579,6 +579,7 @@ static void __exit hisi_ddrc_pmu_module_exit(void)
 }
 module_exit(hisi_ddrc_pmu_module_exit);
 
+MODULE_IMPORT_NS(HISI_PMU);
 MODULE_DESCRIPTION("HiSilicon SoC DDRC uncore PMU driver");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Shaokun Zhang <zhangshaokun@hisilicon.com>");
diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
index 21e69b1cdd4d..81804fe873bf 100644
--- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
@@ -581,6 +581,7 @@ static void __exit hisi_hha_pmu_module_exit(void)
 }
 module_exit(hisi_hha_pmu_module_exit);
 
+MODULE_IMPORT_NS(HISI_PMU);
 MODULE_DESCRIPTION("HiSilicon SoC HHA uncore PMU driver");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Shaokun Zhang <zhangshaokun@hisilicon.com>");
diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
index 51ba76871097..cb559789861a 100644
--- a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
@@ -615,6 +615,7 @@ static void __exit hisi_l3c_pmu_module_exit(void)
 }
 module_exit(hisi_l3c_pmu_module_exit);
 
+MODULE_IMPORT_NS(HISI_PMU);
 MODULE_DESCRIPTION("HiSilicon SoC L3C uncore PMU driver");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Anurup M <anurup.m@huawei.com>");
diff --git a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
index 3cdb35c741f9..8d29c87980e4 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
@@ -569,6 +569,7 @@ static void __exit hisi_pa_pmu_module_exit(void)
 }
 module_exit(hisi_pa_pmu_module_exit);
 
+MODULE_IMPORT_NS(HISI_PMU);
 MODULE_DESCRIPTION("HiSilicon Protocol Adapter uncore PMU driver");
 MODULE_LICENSE("GPL v2");
 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
index 918cdc31de57..416f72a813fc 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -34,7 +34,7 @@ ssize_t hisi_event_sysfs_show(struct device *dev,
 
 	return sysfs_emit(page, "config=0x%lx\n", (unsigned long)eattr->var);
 }
-EXPORT_SYMBOL_GPL(hisi_event_sysfs_show);
+EXPORT_SYMBOL_NS_GPL(hisi_event_sysfs_show, HISI_PMU);
 
 /*
  * sysfs cpumask attributes. For uncore PMU, we only have a single CPU to show
@@ -46,7 +46,7 @@ ssize_t hisi_cpumask_sysfs_show(struct device *dev,
 
 	return sysfs_emit(buf, "%d\n", hisi_pmu->on_cpu);
 }
-EXPORT_SYMBOL_GPL(hisi_cpumask_sysfs_show);
+EXPORT_SYMBOL_NS_GPL(hisi_cpumask_sysfs_show, HISI_PMU);
 
 static bool hisi_validate_event_group(struct perf_event *event)
 {
@@ -96,7 +96,7 @@ int hisi_uncore_pmu_get_event_idx(struct perf_event *event)
 
 	return idx;
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_get_event_idx);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_get_event_idx, HISI_PMU);
 
 ssize_t hisi_uncore_pmu_identifier_attr_show(struct device *dev,
 					     struct device_attribute *attr,
@@ -106,7 +106,7 @@ ssize_t hisi_uncore_pmu_identifier_attr_show(struct device *dev,
 
 	return sysfs_emit(page, "0x%08x\n", hisi_pmu->identifier);
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_identifier_attr_show);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_identifier_attr_show, HISI_PMU);
 
 static void hisi_uncore_pmu_clear_event_idx(struct hisi_pmu *hisi_pmu, int idx)
 {
@@ -165,7 +165,7 @@ int hisi_uncore_pmu_init_irq(struct hisi_pmu *hisi_pmu,
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_init_irq);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_init_irq, HISI_PMU);
 
 int hisi_uncore_pmu_event_init(struct perf_event *event)
 {
@@ -219,7 +219,7 @@ int hisi_uncore_pmu_event_init(struct perf_event *event)
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_event_init);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_event_init, HISI_PMU);
 
 /*
  * Set the counter to count the event that we're interested in,
@@ -273,7 +273,7 @@ void hisi_uncore_pmu_set_event_period(struct perf_event *event)
 	/* Write start value to the hardware event counter */
 	hisi_pmu->ops->write_counter(hisi_pmu, hwc, val);
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_set_event_period);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_set_event_period, HISI_PMU);
 
 void hisi_uncore_pmu_event_update(struct perf_event *event)
 {
@@ -294,7 +294,7 @@ void hisi_uncore_pmu_event_update(struct perf_event *event)
 		HISI_MAX_PERIOD(hisi_pmu->counter_bits);
 	local64_add(delta, &event->count);
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_event_update);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_event_update, HISI_PMU);
 
 void hisi_uncore_pmu_start(struct perf_event *event, int flags)
 {
@@ -317,7 +317,7 @@ void hisi_uncore_pmu_start(struct perf_event *event, int flags)
 	hisi_uncore_pmu_enable_event(event);
 	perf_event_update_userpage(event);
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_start);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_start, HISI_PMU);
 
 void hisi_uncore_pmu_stop(struct perf_event *event, int flags)
 {
@@ -334,7 +334,7 @@ void hisi_uncore_pmu_stop(struct perf_event *event, int flags)
 	hisi_uncore_pmu_event_update(event);
 	hwc->state |= PERF_HES_UPTODATE;
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_stop);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_stop, HISI_PMU);
 
 int hisi_uncore_pmu_add(struct perf_event *event, int flags)
 {
@@ -357,7 +357,7 @@ int hisi_uncore_pmu_add(struct perf_event *event, int flags)
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_add);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_add, HISI_PMU);
 
 void hisi_uncore_pmu_del(struct perf_event *event, int flags)
 {
@@ -369,14 +369,14 @@ void hisi_uncore_pmu_del(struct perf_event *event, int flags)
 	perf_event_update_userpage(event);
 	hisi_pmu->pmu_events.hw_events[hwc->idx] = NULL;
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_del);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_del, HISI_PMU);
 
 void hisi_uncore_pmu_read(struct perf_event *event)
 {
 	/* Read hardware counter and update the perf counter statistics */
 	hisi_uncore_pmu_event_update(event);
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_read);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_read, HISI_PMU);
 
 void hisi_uncore_pmu_enable(struct pmu *pmu)
 {
@@ -389,7 +389,7 @@ void hisi_uncore_pmu_enable(struct pmu *pmu)
 
 	hisi_pmu->ops->start_counters(hisi_pmu);
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_enable);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_enable, HISI_PMU);
 
 void hisi_uncore_pmu_disable(struct pmu *pmu)
 {
@@ -397,7 +397,7 @@ void hisi_uncore_pmu_disable(struct pmu *pmu)
 
 	hisi_pmu->ops->stop_counters(hisi_pmu);
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_disable);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_disable, HISI_PMU);
 
 
 /*
@@ -484,7 +484,7 @@ int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node)
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_online_cpu);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_online_cpu, HISI_PMU);
 
 int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
 {
@@ -515,7 +515,7 @@ int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(hisi_uncore_pmu_offline_cpu);
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_offline_cpu, HISI_PMU);
 
 void hisi_pmu_init(struct hisi_pmu *hisi_pmu, struct module *module)
 {
@@ -535,7 +535,7 @@ void hisi_pmu_init(struct hisi_pmu *hisi_pmu, struct module *module)
 	pmu->attr_groups        = hisi_pmu->pmu_events.attr_groups;
 	pmu->capabilities       = PERF_PMU_CAP_NO_EXCLUDE;
 }
-EXPORT_SYMBOL_GPL(hisi_pmu_init);
+EXPORT_SYMBOL_NS_GPL(hisi_pmu_init, HISI_PMU);
 
 MODULE_DESCRIPTION("HiSilicon SoC uncore Performance Monitor driver framework");
 MODULE_LICENSE("GPL v2");
diff --git a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
index 765bbd61db26..d0c2e86c558e 100644
--- a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
@@ -507,6 +507,7 @@ static void __exit hisi_sllc_pmu_module_exit(void)
 }
 module_exit(hisi_sllc_pmu_module_exit);
 
+MODULE_IMPORT_NS(HISI_PMU);
 MODULE_DESCRIPTION("HiSilicon SLLC uncore PMU driver");
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Shaokun Zhang <zhangshaokun@hisilicon.com>");
diff --git a/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
index 481dcc9e8fbf..9c724dab6b64 100644
--- a/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
@@ -613,6 +613,7 @@ static void __exit hisi_uc_pmu_module_exit(void)
 }
 module_exit(hisi_uc_pmu_module_exit);
 
+MODULE_IMPORT_NS(HISI_PMU);
 MODULE_DESCRIPTION("HiSilicon SoC UC uncore PMU driver");
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Junhao He <hejunhao3@huawei.com>");
-- 
2.24.0

[PATCH v2 2/8] drivers/perf: hisi: Improve the detection of associated CPUs

[Yicong Yang]

From: Yicong Yang <yangyicong@hisilicon.com>

Currently the associated CPUs are detected in the cpuhp online
callback. If the CPU's sccl_id or the ccl_id matches the PMU's,
they're associated. There's an exception that some PMUs locate
on the SICL and will match no CPUs. The events of these PMUs
can be opened on any online CPUs. To handle this we just check
whether the PMU's sccl_id is -1, if so we know it locates on
SICL and make any CPU associated to it.

This can be tweaked so in this patch just do the below changes:
- If the PMU doesn't match any CPU then associated it to online CPUs
- Choose the target CPU according to the NUMA affinity for opening
  events

The function is implemented by hisi_pmu_init_associated_cpus() and
invoked in hisi_pmu_init().

Also the associated_cpus are maintained with all the online CPUs. This
is redundant since we'll always schedule the events on the online CPUs.
Get rid of this and make associated_cpus contain offline CPUs as well.

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/perf/hisilicon/hisi_uncore_pmu.c | 56 +++++++++++++++++++-----
 drivers/perf/hisilicon/hisi_uncore_pmu.h |  5 +++
 2 files changed, 49 insertions(+), 12 deletions(-)

diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
index 416f72a813fc..c3549e16e0c3 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -399,6 +399,27 @@ void hisi_uncore_pmu_disable(struct pmu *pmu)
 }
 EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_disable, HISI_PMU);
 
+static void hisi_pmu_init_associated_cpus(struct hisi_pmu *hisi_pmu)
+{
+	/*
+	 * If the associated_cpus has already been initialized, for example
+	 * determined by comparing the sccl_id and ccl_id with the CPU's
+	 * mpidr_el1, then do nothing here. Otherwise the PMU has no affinity
+	 * and could be opened on any online CPU.
+	 */
+	if (!cpumask_empty(&hisi_pmu->associated_cpus))
+		return;
+
+	cpumask_copy(&hisi_pmu->associated_cpus, cpu_online_mask);
+	hisi_pmu->dummy_associated_cpus = true;
+
+	/*
+	 * Otherwise the associated CPUs haven't been online yet. Pick a
+	 * nearest CPU according to the PMU's numa node instead.
+	 */
+	hisi_pmu->on_cpu = cpumask_local_spread(0, dev_to_node(hisi_pmu->dev));
+	WARN_ON(irq_set_affinity(hisi_pmu->irq, cpumask_of(hisi_pmu->on_cpu)));
+}
 
 /*
  * The Super CPU Cluster (SCCL) and CPU Cluster (CCL) IDs can be
@@ -446,10 +467,6 @@ static bool hisi_pmu_cpu_is_associated_pmu(struct hisi_pmu *hisi_pmu)
 {
 	int sccl_id, ccl_id;
 
-	/* If SCCL_ID is -1, the PMU is in a SICL and has no CPU affinity */
-	if (hisi_pmu->sccl_id == -1)
-		return true;
-
 	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);
@@ -467,13 +484,29 @@ 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;
+	/*
+	 * If the CPU is not in the associated_cpus, it maybe a new CPU.
+	 * Test whether it's associated or not.
+	 */
+	if (!cpumask_test_cpu(cpu, &hisi_pmu->associated_cpus)) {
+		if (!hisi_pmu_cpu_is_associated_pmu(hisi_pmu))
+			return 0;
+
+		/*
+		 * We found an associated CPU so we don't need to use the dummy
+		 * associated CPUs. Update it.
+		 */
+		if (hisi_pmu->dummy_associated_cpus) {
+			cpumask_clear(&hisi_pmu->associated_cpus);
+			hisi_pmu->dummy_associated_cpus = false;
+		}
 
-	cpumask_set_cpu(cpu, &hisi_pmu->associated_cpus);
+		cpumask_set_cpu(cpu, &hisi_pmu->associated_cpus);
+	}
 
-	/* If another CPU is already managing this PMU, simply return. */
-	if (hisi_pmu->on_cpu != -1)
+	/* If another associated CPU is already managing this PMU, simply return. */
+	if (hisi_pmu->on_cpu != -1 &&
+	    cpumask_test_cpu(hisi_pmu->on_cpu, &hisi_pmu->associated_cpus))
 		return 0;
 
 	/* Use this CPU in cpumask for event counting */
@@ -492,9 +525,6 @@ int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
 						     node);
 	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;
@@ -521,6 +551,8 @@ void hisi_pmu_init(struct hisi_pmu *hisi_pmu, struct module *module)
 {
 	struct pmu *pmu = &hisi_pmu->pmu;
 
+	hisi_pmu_init_associated_cpus(hisi_pmu);
+
 	pmu->module             = module;
 	pmu->parent             = hisi_pmu->dev;
 	pmu->task_ctx_nr        = perf_invalid_context;
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisilicon/hisi_uncore_pmu.h
index 25b2d43b72bf..0e2f844b5fd9 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.h
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.h
@@ -89,6 +89,11 @@ struct hisi_pmu {
 	struct hisi_pmu_hwevents pmu_events;
 	/* associated_cpus: All CPUs associated with the PMU */
 	cpumask_t associated_cpus;
+	/*
+	 * If the real associated CPUs not onlined by the time initializing,
+	 * we'll initialize with online CPUs and indicate it.
+	 */
+	bool dummy_associated_cpus;
 	/* CPU used for counting */
 	int on_cpu;
 	int irq;
-- 
2.24.0

[PATCH v2 3/8] drivers/perf: hisi: Extract topology information to a separate structure

[Yicong Yang]

From: Yicong Yang <yangyicong@hisilicon.com>

HiSilicon Uncore PMUs are identified by the IDs of the topology element
on which the PMUs are located. Add a new separate struct hisi_pmu_toplogy
to encapsulate this information. Add additional documentation on the
meaning of each ID.

- make sccl_id and sicl_id into a union since they're exclusive. It can
  also be accessed by scl_id if the SICL/SCCL distinction is not
  relevant
- make index_id and sub_id signed so -1 may be used to indicate the PMU
  doesn't have this topology element or it could not be retrieved.

This patch should have no functional changes.

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c  | 12 +++---
 drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c | 18 ++++-----
 drivers/perf/hisilicon/hisi_uncore_hha_pmu.c  | 12 +++---
 drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c  |  8 ++--
 drivers/perf/hisilicon/hisi_uncore_pa_pmu.c   | 14 +++----
 drivers/perf/hisilicon/hisi_uncore_pmu.c      |  7 ++--
 drivers/perf/hisilicon/hisi_uncore_pmu.h      | 38 +++++++++++++++----
 drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c | 10 ++---
 drivers/perf/hisilicon/hisi_uncore_uc_pmu.c   | 11 +++---
 9 files changed, 78 insertions(+), 52 deletions(-)

diff --git a/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c b/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
index 710c1f92fef6..d0b250fe0619 100644
--- a/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
@@ -181,19 +181,19 @@ static int hisi_cpa_pmu_init_data(struct platform_device *pdev,
 				  struct hisi_pmu *cpa_pmu)
 {
 	if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
-				     &cpa_pmu->sicl_id)) {
+				     &cpa_pmu->topo.sicl_id)) {
 		dev_err(&pdev->dev, "Can not read sicl-id\n");
 		return -EINVAL;
 	}
 
 	if (device_property_read_u32(&pdev->dev, "hisilicon,idx-id",
-				     &cpa_pmu->index_id)) {
+				     &cpa_pmu->topo.index_id)) {
 		dev_err(&pdev->dev, "Cannot read idx-id\n");
 		return -EINVAL;
 	}
 
-	cpa_pmu->ccl_id = -1;
-	cpa_pmu->sccl_id = -1;
+	cpa_pmu->topo.ccl_id = -1;
+	cpa_pmu->topo.sccl_id = -1;
 	cpa_pmu->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(cpa_pmu->base))
 		return PTR_ERR(cpa_pmu->base);
@@ -311,8 +311,8 @@ static int hisi_cpa_pmu_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sicl%d_cpa%u",
-			      cpa_pmu->sicl_id, cpa_pmu->index_id);
+	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sicl%d_cpa%d",
+			      cpa_pmu->topo.sicl_id, cpa_pmu->topo.index_id);
 	if (!name)
 		return -ENOMEM;
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
index 56f15e9775bd..190a10ae2af6 100644
--- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
@@ -302,18 +302,18 @@ static int hisi_ddrc_pmu_init_data(struct platform_device *pdev,
 	 * DDRC PMU, while SCCL_ID is in MPIDR[aff2].
 	 */
 	if (device_property_read_u32(&pdev->dev, "hisilicon,ch-id",
-				     &ddrc_pmu->index_id)) {
+				     &ddrc_pmu->topo.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)) {
+				     &ddrc_pmu->topo.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;
+	ddrc_pmu->topo.ccl_id = -1;
 
 	ddrc_pmu->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(ddrc_pmu->base)) {
@@ -324,7 +324,7 @@ static int hisi_ddrc_pmu_init_data(struct platform_device *pdev,
 	ddrc_pmu->identifier = readl(ddrc_pmu->base + DDRC_VERSION);
 	if (ddrc_pmu->identifier >= HISI_PMU_V2) {
 		if (device_property_read_u32(&pdev->dev, "hisilicon,sub-id",
-					     &ddrc_pmu->sub_id)) {
+					     &ddrc_pmu->topo.sub_id)) {
 			dev_err(&pdev->dev, "Can not read sub-id!\n");
 			return -EINVAL;
 		}
@@ -501,13 +501,13 @@ static int hisi_ddrc_pmu_probe(struct platform_device *pdev)
 
 	if (ddrc_pmu->identifier >= HISI_PMU_V2)
 		name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
-				      "hisi_sccl%u_ddrc%u_%u",
-				      ddrc_pmu->sccl_id, ddrc_pmu->index_id,
-				      ddrc_pmu->sub_id);
+				      "hisi_sccl%d_ddrc%d_%d",
+				      ddrc_pmu->topo.sccl_id, ddrc_pmu->topo.index_id,
+				      ddrc_pmu->topo.sub_id);
 	else
 		name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
-				      "hisi_sccl%u_ddrc%u", ddrc_pmu->sccl_id,
-				      ddrc_pmu->index_id);
+				      "hisi_sccl%d_ddrc%d", ddrc_pmu->topo.sccl_id,
+				      ddrc_pmu->topo.index_id);
 
 	if (!name)
 		return -ENOMEM;
diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
index 81804fe873bf..b3535101d5f6 100644
--- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
@@ -300,7 +300,7 @@ static int hisi_hha_pmu_init_data(struct platform_device *pdev,
 	 * SCCL_ID is in MPIDR[aff2].
 	 */
 	if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
-				     &hha_pmu->sccl_id)) {
+				     &hha_pmu->topo.sccl_id)) {
 		dev_err(&pdev->dev, "Can not read hha sccl-id!\n");
 		return -EINVAL;
 	}
@@ -310,7 +310,7 @@ static int hisi_hha_pmu_init_data(struct platform_device *pdev,
 	 * both "hisilicon, idx-id" as preference, if available.
 	 */
 	if (device_property_read_u32(&pdev->dev, "hisilicon,idx-id",
-				     &hha_pmu->index_id)) {
+				     &hha_pmu->topo.index_id)) {
 		status = acpi_evaluate_integer(ACPI_HANDLE(&pdev->dev),
 					       "_UID", NULL, &id);
 		if (ACPI_FAILURE(status)) {
@@ -318,10 +318,10 @@ static int hisi_hha_pmu_init_data(struct platform_device *pdev,
 			return -EINVAL;
 		}
 
-		hha_pmu->index_id = id;
+		hha_pmu->topo.index_id = id;
 	}
 	/* HHA PMUs only share the same SCCL */
-	hha_pmu->ccl_id = -1;
+	hha_pmu->topo.ccl_id = -1;
 
 	hha_pmu->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(hha_pmu->base)) {
@@ -510,8 +510,8 @@ static int hisi_hha_pmu_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_hha%u",
-			      hha_pmu->sccl_id, hha_pmu->index_id);
+	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%d_hha%d",
+			      hha_pmu->topo.sccl_id, hha_pmu->topo.index_id);
 	if (!name)
 		return -ENOMEM;
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
index cb559789861a..2a873a5e66a1 100644
--- a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
@@ -360,13 +360,13 @@ static int hisi_l3c_pmu_init_data(struct platform_device *pdev,
 	 * 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)) {
+				     &l3c_pmu->topo.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)) {
+				     &l3c_pmu->topo.ccl_id)) {
 		dev_err(&pdev->dev, "Can not read l3c ccl-id!\n");
 		return -EINVAL;
 	}
@@ -544,8 +544,8 @@ static int hisi_l3c_pmu_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_l3c%u",
-			      l3c_pmu->sccl_id, l3c_pmu->ccl_id);
+	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%d_l3c%d",
+			      l3c_pmu->topo.sccl_id, l3c_pmu->topo.ccl_id);
 	if (!name)
 		return -ENOMEM;
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
index 8d29c87980e4..a23b012398a1 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
@@ -274,19 +274,19 @@ static int hisi_pa_pmu_init_data(struct platform_device *pdev,
 	 * to identify the PA PMU.
 	 */
 	if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
-				     &pa_pmu->sicl_id)) {
+				     &pa_pmu->topo.sicl_id)) {
 		dev_err(&pdev->dev, "Cannot read sicl-id!\n");
 		return -EINVAL;
 	}
 
 	if (device_property_read_u32(&pdev->dev, "hisilicon,idx-id",
-				     &pa_pmu->index_id)) {
+				     &pa_pmu->topo.index_id)) {
 		dev_err(&pdev->dev, "Cannot read idx-id!\n");
 		return -EINVAL;
 	}
 
-	pa_pmu->ccl_id = -1;
-	pa_pmu->sccl_id = -1;
+	pa_pmu->topo.ccl_id = -1;
+	pa_pmu->topo.sccl_id = -1;
 
 	pa_pmu->dev_info = device_get_match_data(&pdev->dev);
 	if (!pa_pmu->dev_info)
@@ -488,9 +488,9 @@ static int hisi_pa_pmu_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sicl%d_%s%u",
-			      pa_pmu->sicl_id, pa_pmu->dev_info->name,
-			      pa_pmu->index_id);
+	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sicl%d_%s%d",
+			      pa_pmu->topo.sicl_id, pa_pmu->dev_info->name,
+			      pa_pmu->topo.index_id);
 	if (!name)
 		return -ENOMEM;
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
index c3549e16e0c3..e48365bb7c48 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -465,18 +465,19 @@ static void hisi_read_sccl_and_ccl_id(int *scclp, int *cclp)
  */
 static bool hisi_pmu_cpu_is_associated_pmu(struct hisi_pmu *hisi_pmu)
 {
+	struct hisi_pmu_topology *topo = &hisi_pmu->topo;
 	int sccl_id, ccl_id;
 
-	if (hisi_pmu->ccl_id == -1) {
+	if (topo->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;
+		return sccl_id == topo->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;
+	return sccl_id == topo->sccl_id && ccl_id == topo->ccl_id;
 }
 
 int hisi_uncore_pmu_online_cpu(unsigned int cpu, struct hlist_node *node)
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisilicon/hisi_uncore_pmu.h
index 0e2f844b5fd9..286c19bb14eb 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.h
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.h
@@ -81,12 +81,43 @@ struct hisi_pmu_hwevents {
 	const struct attribute_group **attr_groups;
 };
 
+/**
+ * struct hisi_pmu_topology - Describe the topology hierarchy on which the PMU
+ *                            is located.
+ * @sccl_id: ID of the SCCL on which the PMU locate is located.
+ * @sicl_id: ID of the SICL on which the PMU locate is located.
+ * @scl_id:  ID used by the core which is unaware of the SCCL/SICL.
+ * @ccl_id: ID of the CCL (CPU cluster) on which the PMU is located.
+ * @index_id: the ID of the PMU module if there're several PMUs at a
+ *            particularly location in the topology.
+ * @sub_id: submodule ID of the PMU. For example we use this for DDRC PMU v2
+ *          since each DDRC has more than one DMC
+ *
+ * The ID will be -1 if the PMU isn't located on a certain topology.
+ */
+struct hisi_pmu_topology {
+	/*
+	 * SCCL (Super CPU CLuster) and SICL (Super I/O Cluster) are parallel
+	 * so a PMU cannot locate on a SCCL and a SICL. If the SCCL/SICL
+	 * distinction is not relevant, use scl_id instead.
+	 */
+	union {
+		int sccl_id;
+		int sicl_id;
+		int scl_id;
+	};
+	int ccl_id;
+	int index_id;
+	int sub_id;
+};
+
 /* Generic pmu struct for different pmu types */
 struct hisi_pmu {
 	struct pmu pmu;
 	const struct hisi_uncore_ops *ops;
 	const struct hisi_pmu_dev_info *dev_info;
 	struct hisi_pmu_hwevents pmu_events;
+	struct hisi_pmu_topology topo;
 	/* associated_cpus: All CPUs associated with the PMU */
 	cpumask_t associated_cpus;
 	/*
@@ -99,14 +130,7 @@ struct hisi_pmu {
 	int irq;
 	struct device *dev;
 	struct hlist_node node;
-	int sccl_id;
-	int sicl_id;
-	int ccl_id;
 	void __iomem *base;
-	/* the ID of the PMU modules */
-	u32 index_id;
-	/* For DDRC PMU v2: each DDRC has more than one DMC */
-	u32 sub_id;
 	int num_counters;
 	int counter_bits;
 	/* check event code range */
diff --git a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
index d0c2e86c558e..ed1b4d6f0ed5 100644
--- a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
@@ -293,19 +293,19 @@ static int hisi_sllc_pmu_init_data(struct platform_device *pdev,
 	 * while SCCL_ID is from MPIDR_EL1 by CPU.
 	 */
 	if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
-				     &sllc_pmu->sccl_id)) {
+				     &sllc_pmu->topo.sccl_id)) {
 		dev_err(&pdev->dev, "Cannot read sccl-id!\n");
 		return -EINVAL;
 	}
 
 	if (device_property_read_u32(&pdev->dev, "hisilicon,idx-id",
-				     &sllc_pmu->index_id)) {
+				     &sllc_pmu->topo.index_id)) {
 		dev_err(&pdev->dev, "Cannot read idx-id!\n");
 		return -EINVAL;
 	}
 
 	/* SLLC PMUs only share the same SCCL */
-	sllc_pmu->ccl_id = -1;
+	sllc_pmu->topo.ccl_id = -1;
 
 	sllc_pmu->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(sllc_pmu->base)) {
@@ -433,8 +433,8 @@ static int hisi_sllc_pmu_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%u_sllc%u",
-			      sllc_pmu->sccl_id, sllc_pmu->index_id);
+	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%d_sllc%d",
+			      sllc_pmu->topo.sccl_id, sllc_pmu->topo.index_id);
 	if (!name)
 		return -ENOMEM;
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
index 9c724dab6b64..19a44498758f 100644
--- a/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
@@ -372,19 +372,19 @@ static int hisi_uc_pmu_init_data(struct platform_device *pdev,
 	 * They have some CCLs per SCCL and then 4 UC PMU per CCL.
 	 */
 	if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
-				     &uc_pmu->sccl_id)) {
+				     &uc_pmu->topo.sccl_id)) {
 		dev_err(&pdev->dev, "Can not read uc sccl-id!\n");
 		return -EINVAL;
 	}
 
 	if (device_property_read_u32(&pdev->dev, "hisilicon,ccl-id",
-				     &uc_pmu->ccl_id)) {
+				     &uc_pmu->topo.ccl_id)) {
 		dev_err(&pdev->dev, "Can not read uc ccl-id!\n");
 		return -EINVAL;
 	}
 
 	if (device_property_read_u32(&pdev->dev, "hisilicon,sub-id",
-				     &uc_pmu->sub_id)) {
+				     &uc_pmu->topo.sub_id)) {
 		dev_err(&pdev->dev, "Can not read sub-id!\n");
 		return -EINVAL;
 	}
@@ -538,8 +538,9 @@ static int hisi_uc_pmu_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%d_uc%d_%u",
-			      uc_pmu->sccl_id, uc_pmu->ccl_id, uc_pmu->sub_id);
+	name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sccl%d_uc%d_%d",
+			      uc_pmu->topo.sccl_id, uc_pmu->topo.ccl_id,
+			      uc_pmu->topo.sub_id);
 	if (!name)
 		return -ENOMEM;
 
-- 
2.24.0

[PATCH v2 4/8] drivers/perf: hisi: Add a common function to retrieve topology from firmware

[Yicong Yang]

From: Yicong Yang <yangyicong@hisilicon.com>

Currently each type of uncore PMU driver uses almost the same routine
and the same firmware interface (or properties) to retrieve the topology
information, then reset the unused IDs to -1. Extract the common parts
to the framework in hisi_uncore_pmu_init_topology().

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c  | 10 +++----
 drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c | 10 +++----
 drivers/perf/hisilicon/hisi_uncore_hha_pmu.c  | 10 +++----
 drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c  |  8 ++---
 drivers/perf/hisilicon/hisi_uncore_pa_pmu.c   | 11 +++----
 drivers/perf/hisilicon/hisi_uncore_pmu.c      | 30 +++++++++++++++++++
 drivers/perf/hisilicon/hisi_uncore_pmu.h      |  1 +
 drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c | 11 +++----
 drivers/perf/hisilicon/hisi_uncore_uc_pmu.c   | 12 ++++----
 9 files changed, 60 insertions(+), 43 deletions(-)

diff --git a/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c b/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
index d0b250fe0619..39b6ba91c8bf 100644
--- a/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
@@ -180,20 +180,18 @@ MODULE_DEVICE_TABLE(acpi, hisi_cpa_pmu_acpi_match);
 static int hisi_cpa_pmu_init_data(struct platform_device *pdev,
 				  struct hisi_pmu *cpa_pmu)
 {
-	if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
-				     &cpa_pmu->topo.sicl_id)) {
+	hisi_uncore_pmu_init_topology(cpa_pmu, &pdev->dev);
+
+	if (cpa_pmu->topo.sicl_id < 0) {
 		dev_err(&pdev->dev, "Can not read sicl-id\n");
 		return -EINVAL;
 	}
 
-	if (device_property_read_u32(&pdev->dev, "hisilicon,idx-id",
-				     &cpa_pmu->topo.index_id)) {
+	if (cpa_pmu->topo.index_id < 0) {
 		dev_err(&pdev->dev, "Cannot read idx-id\n");
 		return -EINVAL;
 	}
 
-	cpa_pmu->topo.ccl_id = -1;
-	cpa_pmu->topo.sccl_id = -1;
 	cpa_pmu->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(cpa_pmu->base))
 		return PTR_ERR(cpa_pmu->base);
diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
index 190a10ae2af6..4a6e22f66de9 100644
--- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
@@ -297,6 +297,8 @@ 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)
 {
+	hisi_uncore_pmu_init_topology(ddrc_pmu, &pdev->dev);
+
 	/*
 	 * Use the SCCL_ID and DDRC channel ID to identify the
 	 * DDRC PMU, while SCCL_ID is in MPIDR[aff2].
@@ -307,13 +309,10 @@ static int hisi_ddrc_pmu_init_data(struct platform_device *pdev,
 		return -EINVAL;
 	}
 
-	if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
-				     &ddrc_pmu->topo.sccl_id)) {
+	if (ddrc_pmu->topo.sccl_id < 0) {
 		dev_err(&pdev->dev, "Can not read ddrc sccl-id!\n");
 		return -EINVAL;
 	}
-	/* DDRC PMUs only share the same SCCL */
-	ddrc_pmu->topo.ccl_id = -1;
 
 	ddrc_pmu->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(ddrc_pmu->base)) {
@@ -323,8 +322,7 @@ static int hisi_ddrc_pmu_init_data(struct platform_device *pdev,
 
 	ddrc_pmu->identifier = readl(ddrc_pmu->base + DDRC_VERSION);
 	if (ddrc_pmu->identifier >= HISI_PMU_V2) {
-		if (device_property_read_u32(&pdev->dev, "hisilicon,sub-id",
-					     &ddrc_pmu->topo.sub_id)) {
+		if (ddrc_pmu->topo.sub_id < 0) {
 			dev_err(&pdev->dev, "Can not read sub-id!\n");
 			return -EINVAL;
 		}
diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
index b3535101d5f6..c47d33ccb489 100644
--- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
@@ -295,12 +295,13 @@ static int hisi_hha_pmu_init_data(struct platform_device *pdev,
 	unsigned long long id;
 	acpi_status status;
 
+	hisi_uncore_pmu_init_topology(hha_pmu, &pdev->dev);
+
 	/*
 	 * 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->topo.sccl_id)) {
+	if (hha_pmu->topo.sccl_id < 0) {
 		dev_err(&pdev->dev, "Can not read hha sccl-id!\n");
 		return -EINVAL;
 	}
@@ -309,8 +310,7 @@ static int hisi_hha_pmu_init_data(struct platform_device *pdev,
 	 * Early versions of BIOS support _UID by mistake, so we support
 	 * both "hisilicon, idx-id" as preference, if available.
 	 */
-	if (device_property_read_u32(&pdev->dev, "hisilicon,idx-id",
-				     &hha_pmu->topo.index_id)) {
+	if (hha_pmu->topo.index_id < 0) {
 		status = acpi_evaluate_integer(ACPI_HANDLE(&pdev->dev),
 					       "_UID", NULL, &id);
 		if (ACPI_FAILURE(status)) {
@@ -320,8 +320,6 @@ static int hisi_hha_pmu_init_data(struct platform_device *pdev,
 
 		hha_pmu->topo.index_id = id;
 	}
-	/* HHA PMUs only share the same SCCL */
-	hha_pmu->topo.ccl_id = -1;
 
 	hha_pmu->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(hha_pmu->base)) {
diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
index 2a873a5e66a1..069ea8ced4c4 100644
--- a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
@@ -355,18 +355,18 @@ 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)
 {
+	hisi_uncore_pmu_init_topology(l3c_pmu, &pdev->dev);
+
 	/*
 	 * 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->topo.sccl_id)) {
+	if (l3c_pmu->topo.sccl_id < 0) {
 		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->topo.ccl_id)) {
+	if (l3c_pmu->topo.ccl_id < 0) {
 		dev_err(&pdev->dev, "Can not read l3c ccl-id!\n");
 		return -EINVAL;
 	}
diff --git a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
index a23b012398a1..d0f89086403b 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
@@ -269,25 +269,22 @@ static void hisi_pa_pmu_clear_int_status(struct hisi_pmu *pa_pmu, int idx)
 static int hisi_pa_pmu_init_data(struct platform_device *pdev,
 				   struct hisi_pmu *pa_pmu)
 {
+	hisi_uncore_pmu_init_topology(pa_pmu, &pdev->dev);
+
 	/*
 	 * As PA PMU is in a SICL, use the SICL_ID and the index ID
 	 * to identify the PA PMU.
 	 */
-	if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
-				     &pa_pmu->topo.sicl_id)) {
+	if (pa_pmu->topo.sicl_id < 0) {
 		dev_err(&pdev->dev, "Cannot read sicl-id!\n");
 		return -EINVAL;
 	}
 
-	if (device_property_read_u32(&pdev->dev, "hisilicon,idx-id",
-				     &pa_pmu->topo.index_id)) {
+	if (pa_pmu->topo.index_id < 0) {
 		dev_err(&pdev->dev, "Cannot read idx-id!\n");
 		return -EINVAL;
 	}
 
-	pa_pmu->topo.ccl_id = -1;
-	pa_pmu->topo.sccl_id = -1;
-
 	pa_pmu->dev_info = device_get_match_data(&pdev->dev);
 	if (!pa_pmu->dev_info)
 		return -ENODEV;
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
index e48365bb7c48..e422a41fba60 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -14,6 +14,7 @@
 #include <linux/err.h>
 #include <linux/errno.h>
 #include <linux/interrupt.h>
+#include <linux/property.h>
 
 #include <asm/cputype.h>
 #include <asm/local64.h>
@@ -548,6 +549,35 @@ int hisi_uncore_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
 }
 EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_offline_cpu, HISI_PMU);
 
+/*
+ * Retrieve the topology information from the firmware for the hisi_pmu device.
+ * The topology ID will be -1 if we cannot initialize it, it may either due to
+ * the PMU doesn't locate on this certain topology or the firmware needs to be
+ * fixed.
+ */
+void hisi_uncore_pmu_init_topology(struct hisi_pmu *hisi_pmu, struct device *dev)
+{
+	struct hisi_pmu_topology *topo = &hisi_pmu->topo;
+
+	topo->sccl_id = -1;
+	topo->ccl_id = -1;
+	topo->index_id = -1;
+	topo->sub_id = -1;
+
+	if (device_property_read_u32(dev, "hisilicon,scl-id", &topo->sccl_id))
+		dev_dbg(dev, "no scl-id present\n");
+
+	if (device_property_read_u32(dev, "hisilicon,ccl-id", &topo->ccl_id))
+		dev_dbg(dev, "no ccl-id present\n");
+
+	if (device_property_read_u32(dev, "hisilicon,idx-id", &topo->index_id))
+		dev_dbg(dev, "no idx-id present\n");
+
+	if (device_property_read_u32(dev, "hisilicon,sub-id", &topo->sub_id))
+		dev_dbg(dev, "no sub-id present\n");
+}
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_init_topology, HISI_PMU);
+
 void hisi_pmu_init(struct hisi_pmu *hisi_pmu, struct module *module)
 {
 	struct pmu *pmu = &hisi_pmu->pmu;
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisilicon/hisi_uncore_pmu.h
index 286c19bb14eb..da5cf622c2b0 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.h
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.h
@@ -161,6 +161,7 @@ ssize_t hisi_uncore_pmu_identifier_attr_show(struct device *dev,
 					     char *page);
 int hisi_uncore_pmu_init_irq(struct hisi_pmu *hisi_pmu,
 			     struct platform_device *pdev);
+void hisi_uncore_pmu_init_topology(struct hisi_pmu *hisi_pmu, struct device *dev);
 
 void hisi_pmu_init(struct hisi_pmu *hisi_pmu, struct module *module);
 #endif /* __HISI_UNCORE_PMU_H__ */
diff --git a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
index ed1b4d6f0ed5..cc78de890316 100644
--- a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
@@ -288,25 +288,22 @@ MODULE_DEVICE_TABLE(acpi, hisi_sllc_pmu_acpi_match);
 static int hisi_sllc_pmu_init_data(struct platform_device *pdev,
 				   struct hisi_pmu *sllc_pmu)
 {
+	hisi_uncore_pmu_init_topology(sllc_pmu, &pdev->dev);
+
 	/*
 	 * Use the SCCL_ID and the index ID to identify the SLLC PMU,
 	 * while SCCL_ID is from MPIDR_EL1 by CPU.
 	 */
-	if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
-				     &sllc_pmu->topo.sccl_id)) {
+	if (sllc_pmu->topo.sccl_id < 0) {
 		dev_err(&pdev->dev, "Cannot read sccl-id!\n");
 		return -EINVAL;
 	}
 
-	if (device_property_read_u32(&pdev->dev, "hisilicon,idx-id",
-				     &sllc_pmu->topo.index_id)) {
+	if (sllc_pmu->topo.index_id < 0) {
 		dev_err(&pdev->dev, "Cannot read idx-id!\n");
 		return -EINVAL;
 	}
 
-	/* SLLC PMUs only share the same SCCL */
-	sllc_pmu->topo.ccl_id = -1;
-
 	sllc_pmu->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(sllc_pmu->base)) {
 		dev_err(&pdev->dev, "ioremap failed for sllc_pmu resource.\n");
diff --git a/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
index 19a44498758f..2df8976ab4be 100644
--- a/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
@@ -11,7 +11,6 @@
 #include <linux/irq.h>
 #include <linux/list.h>
 #include <linux/mod_devicetable.h>
-#include <linux/property.h>
 
 #include "hisi_uncore_pmu.h"
 
@@ -366,25 +365,24 @@ static void hisi_uc_pmu_clear_int_status(struct hisi_pmu *uc_pmu, int idx)
 static int hisi_uc_pmu_init_data(struct platform_device *pdev,
 				 struct hisi_pmu *uc_pmu)
 {
+	hisi_uncore_pmu_init_topology(uc_pmu, &pdev->dev);
+
 	/*
 	 * Use SCCL (Super CPU Cluster) ID and CCL (CPU Cluster) ID to
 	 * identify the topology information of UC PMU devices in the chip.
 	 * They have some CCLs per SCCL and then 4 UC PMU per CCL.
 	 */
-	if (device_property_read_u32(&pdev->dev, "hisilicon,scl-id",
-				     &uc_pmu->topo.sccl_id)) {
+	if (uc_pmu->topo.sccl_id < 0) {
 		dev_err(&pdev->dev, "Can not read uc sccl-id!\n");
 		return -EINVAL;
 	}
 
-	if (device_property_read_u32(&pdev->dev, "hisilicon,ccl-id",
-				     &uc_pmu->topo.ccl_id)) {
+	if (uc_pmu->topo.ccl_id < 0) {
 		dev_err(&pdev->dev, "Can not read uc ccl-id!\n");
 		return -EINVAL;
 	}
 
-	if (device_property_read_u32(&pdev->dev, "hisilicon,sub-id",
-				     &uc_pmu->topo.sub_id)) {
+	if (uc_pmu->topo.sub_id < 0) {
 		dev_err(&pdev->dev, "Can not read sub-id!\n");
 		return -EINVAL;
 	}
-- 
2.24.0

[PATCH v2 5/8] drivers/perf: hisi: Provide a generic implementation of cpumask/identifier

[Yicong Yang]

From: Yicong Yang <yangyicong@hisilicon.com>

Each type of HiSilicon Uncore PMU has the following sysfs attributes:

- format: bitmask in perf_event_attr::config[012] of corresponding
  attribute
- event: events name and corresponding event code
- cpumask: range of CPUs the events can be opened on
- identifier: the version of this PMU

Different types of PMU have different implementations of the "format"
and "event" but all share the same implementation of the "cpumask"
and "identifier". Thus we can move cpumask and identifier to the
hisi_uncore_pmu framework and drivers can use the generic
implementation.

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
---
 drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c  | 27 +----------
 drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c | 31 ++-----------
 drivers/perf/hisilicon/hisi_uncore_hha_pmu.c  | 32 +++----------
 drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c  | 31 ++-----------
 drivers/perf/hisilicon/hisi_uncore_pa_pmu.c   | 35 +++------------
 drivers/perf/hisilicon/hisi_uncore_pmu.c      | 45 ++++++++++++++-----
 drivers/perf/hisilicon/hisi_uncore_pmu.h      |  4 ++
 drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c | 27 +----------
 drivers/perf/hisilicon/hisi_uncore_uc_pmu.c   | 27 +----------
 9 files changed, 64 insertions(+), 195 deletions(-)

diff --git a/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c b/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
index 39b6ba91c8bf..40a2bbc01d3c 100644
--- a/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
@@ -225,34 +225,11 @@ static const struct attribute_group hisi_cpa_pmu_events_group = {
 	.attrs = hisi_cpa_pmu_events_attr,
 };
 
-static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
-
-static struct attribute *hisi_cpa_pmu_cpumask_attrs[] = {
-	&dev_attr_cpumask.attr,
-	NULL
-};
-
-static const struct attribute_group hisi_cpa_pmu_cpumask_attr_group = {
-	.attrs = hisi_cpa_pmu_cpumask_attrs,
-};
-
-static struct device_attribute hisi_cpa_pmu_identifier_attr =
-	__ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);
-
-static struct attribute *hisi_cpa_pmu_identifier_attrs[] = {
-	&hisi_cpa_pmu_identifier_attr.attr,
-	NULL
-};
-
-static const struct attribute_group hisi_cpa_pmu_identifier_group = {
-	.attrs = hisi_cpa_pmu_identifier_attrs,
-};
-
 static const struct attribute_group *hisi_cpa_pmu_attr_groups[] = {
 	&hisi_cpa_pmu_format_group,
 	&hisi_cpa_pmu_events_group,
-	&hisi_cpa_pmu_cpumask_attr_group,
-	&hisi_cpa_pmu_identifier_group,
+	&hisi_pmu_cpumask_attr_group,
+	&hisi_pmu_identifier_group,
 	NULL
 };
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
index 4a6e22f66de9..1b8f8b18d1a7 100644
--- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
@@ -380,42 +380,19 @@ static const struct attribute_group hisi_ddrc_pmu_v2_events_group = {
 	.attrs = hisi_ddrc_pmu_v2_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 struct device_attribute hisi_ddrc_pmu_identifier_attr =
-	__ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);
-
-static struct attribute *hisi_ddrc_pmu_identifier_attrs[] = {
-	&hisi_ddrc_pmu_identifier_attr.attr,
-	NULL
-};
-
-static const struct attribute_group hisi_ddrc_pmu_identifier_group = {
-	.attrs = hisi_ddrc_pmu_identifier_attrs,
-};
-
 static const struct attribute_group *hisi_ddrc_pmu_v1_attr_groups[] = {
 	&hisi_ddrc_pmu_v1_format_group,
 	&hisi_ddrc_pmu_v1_events_group,
-	&hisi_ddrc_pmu_cpumask_attr_group,
-	&hisi_ddrc_pmu_identifier_group,
+	&hisi_pmu_cpumask_attr_group,
+	&hisi_pmu_identifier_group,
 	NULL,
 };
 
 static const struct attribute_group *hisi_ddrc_pmu_v2_attr_groups[] = {
 	&hisi_ddrc_pmu_v2_format_group,
 	&hisi_ddrc_pmu_v2_events_group,
-	&hisi_ddrc_pmu_cpumask_attr_group,
-	&hisi_ddrc_pmu_identifier_group,
+	&hisi_pmu_cpumask_attr_group,
+	&hisi_pmu_identifier_group,
 	NULL
 };
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
index c47d33ccb489..742fb67d8a02 100644
--- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
@@ -405,42 +405,19 @@ static const struct attribute_group hisi_hha_pmu_v2_events_group = {
 	.attrs = hisi_hha_pmu_v2_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 struct device_attribute hisi_hha_pmu_identifier_attr =
-	__ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);
-
-static struct attribute *hisi_hha_pmu_identifier_attrs[] = {
-	&hisi_hha_pmu_identifier_attr.attr,
-	NULL
-};
-
-static const struct attribute_group hisi_hha_pmu_identifier_group = {
-	.attrs = hisi_hha_pmu_identifier_attrs,
-};
-
 static const struct attribute_group *hisi_hha_pmu_v1_attr_groups[] = {
 	&hisi_hha_pmu_v1_format_group,
 	&hisi_hha_pmu_v1_events_group,
-	&hisi_hha_pmu_cpumask_attr_group,
-	&hisi_hha_pmu_identifier_group,
+	&hisi_pmu_cpumask_attr_group,
+	&hisi_pmu_identifier_group,
 	NULL,
 };
 
 static const struct attribute_group *hisi_hha_pmu_v2_attr_groups[] = {
 	&hisi_hha_pmu_v2_format_group,
 	&hisi_hha_pmu_v2_events_group,
-	&hisi_hha_pmu_cpumask_attr_group,
-	&hisi_hha_pmu_identifier_group,
+	&hisi_pmu_cpumask_attr_group,
+	&hisi_pmu_identifier_group,
 	NULL
 };
 
@@ -485,6 +462,7 @@ static int hisi_hha_pmu_dev_probe(struct platform_device *pdev,
 		hha_pmu->pmu_events.attr_groups = hisi_hha_pmu_v1_attr_groups;
 		hha_pmu->num_counters = HHA_V1_NR_COUNTERS;
 	}
+
 	hha_pmu->ops = &hisi_uncore_hha_ops;
 	hha_pmu->dev = &pdev->dev;
 	hha_pmu->on_cpu = -1;
diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
index 069ea8ced4c4..9bd53aa54a4a 100644
--- a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
@@ -441,42 +441,19 @@ static const struct attribute_group hisi_l3c_pmu_v2_events_group = {
 	.attrs = hisi_l3c_pmu_v2_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 struct device_attribute hisi_l3c_pmu_identifier_attr =
-	__ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);
-
-static struct attribute *hisi_l3c_pmu_identifier_attrs[] = {
-	&hisi_l3c_pmu_identifier_attr.attr,
-	NULL
-};
-
-static const struct attribute_group hisi_l3c_pmu_identifier_group = {
-	.attrs = hisi_l3c_pmu_identifier_attrs,
-};
-
 static const struct attribute_group *hisi_l3c_pmu_v1_attr_groups[] = {
 	&hisi_l3c_pmu_v1_format_group,
 	&hisi_l3c_pmu_v1_events_group,
-	&hisi_l3c_pmu_cpumask_attr_group,
-	&hisi_l3c_pmu_identifier_group,
+	&hisi_pmu_cpumask_attr_group,
+	&hisi_pmu_identifier_group,
 	NULL,
 };
 
 static const struct attribute_group *hisi_l3c_pmu_v2_attr_groups[] = {
 	&hisi_l3c_pmu_v2_format_group,
 	&hisi_l3c_pmu_v2_events_group,
-	&hisi_l3c_pmu_cpumask_attr_group,
-	&hisi_l3c_pmu_identifier_group,
+	&hisi_pmu_cpumask_attr_group,
+	&hisi_pmu_identifier_group,
 	NULL
 };
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
index d0f89086403b..a38fe50abdd9 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
@@ -353,29 +353,6 @@ static const struct attribute_group hisi_h60pa_pmu_events_group = {
 	.attrs = hisi_h60pa_pmu_events_attr,
 };
 
-static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
-
-static struct attribute *hisi_pa_pmu_cpumask_attrs[] = {
-	&dev_attr_cpumask.attr,
-	NULL
-};
-
-static const struct attribute_group hisi_pa_pmu_cpumask_attr_group = {
-	.attrs = hisi_pa_pmu_cpumask_attrs,
-};
-
-static struct device_attribute hisi_pa_pmu_identifier_attr =
-	__ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);
-
-static struct attribute *hisi_pa_pmu_identifier_attrs[] = {
-	&hisi_pa_pmu_identifier_attr.attr,
-	NULL
-};
-
-static const struct attribute_group hisi_pa_pmu_identifier_group = {
-	.attrs = hisi_pa_pmu_identifier_attrs,
-};
-
 static struct hisi_pa_pmu_int_regs hisi_pa_pmu_regs = {
 	.mask_offset = PA_INT_MASK,
 	.clear_offset = PA_INT_CLEAR,
@@ -385,8 +362,8 @@ static struct hisi_pa_pmu_int_regs hisi_pa_pmu_regs = {
 static const struct attribute_group *hisi_pa_pmu_v2_attr_groups[] = {
 	&hisi_pa_pmu_v2_format_group,
 	&hisi_pa_pmu_v2_events_group,
-	&hisi_pa_pmu_cpumask_attr_group,
-	&hisi_pa_pmu_identifier_group,
+	&hisi_pmu_cpumask_attr_group,
+	&hisi_pmu_identifier_group,
 	NULL
 };
 
@@ -399,8 +376,8 @@ static const struct hisi_pmu_dev_info hisi_h32pa_v2 = {
 static const struct attribute_group *hisi_pa_pmu_v3_attr_groups[] = {
 	&hisi_pa_pmu_v2_format_group,
 	&hisi_pa_pmu_v3_events_group,
-	&hisi_pa_pmu_cpumask_attr_group,
-	&hisi_pa_pmu_identifier_group,
+	&hisi_pmu_cpumask_attr_group,
+	&hisi_pmu_identifier_group,
 	NULL
 };
 
@@ -419,8 +396,8 @@ static struct hisi_pa_pmu_int_regs hisi_h60pa_pmu_regs = {
 static const struct attribute_group *hisi_h60pa_pmu_attr_groups[] = {
 	&hisi_pa_pmu_v2_format_group,
 	&hisi_h60pa_pmu_events_group,
-	&hisi_pa_pmu_cpumask_attr_group,
-	&hisi_pa_pmu_identifier_group,
+	&hisi_pmu_cpumask_attr_group,
+	&hisi_pmu_identifier_group,
 	NULL
 };
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
index e422a41fba60..ac74d8312ee5 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -49,6 +49,41 @@ ssize_t hisi_cpumask_sysfs_show(struct device *dev,
 }
 EXPORT_SYMBOL_NS_GPL(hisi_cpumask_sysfs_show, HISI_PMU);
 
+static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
+
+static struct attribute *hisi_pmu_cpumask_attrs[] = {
+	&dev_attr_cpumask.attr,
+	NULL
+};
+
+const struct attribute_group hisi_pmu_cpumask_attr_group = {
+	.attrs = hisi_pmu_cpumask_attrs,
+};
+EXPORT_SYMBOL_NS_GPL(hisi_pmu_cpumask_attr_group, HISI_PMU);
+
+ssize_t hisi_uncore_pmu_identifier_attr_show(struct device *dev,
+					     struct device_attribute *attr,
+					     char *page)
+{
+	struct hisi_pmu *hisi_pmu = to_hisi_pmu(dev_get_drvdata(dev));
+
+	return sysfs_emit(page, "0x%08x\n", hisi_pmu->identifier);
+}
+EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_identifier_attr_show, HISI_PMU);
+
+static struct device_attribute hisi_pmu_identifier_attr =
+	__ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);
+
+static struct attribute *hisi_pmu_identifier_attrs[] = {
+	&hisi_pmu_identifier_attr.attr,
+	NULL
+};
+
+const struct attribute_group hisi_pmu_identifier_group = {
+	.attrs = hisi_pmu_identifier_attrs,
+};
+EXPORT_SYMBOL_NS_GPL(hisi_pmu_identifier_group, HISI_PMU);
+
 static bool hisi_validate_event_group(struct perf_event *event)
 {
 	struct perf_event *sibling, *leader = event->group_leader;
@@ -99,16 +134,6 @@ int hisi_uncore_pmu_get_event_idx(struct perf_event *event)
 }
 EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_get_event_idx, HISI_PMU);
 
-ssize_t hisi_uncore_pmu_identifier_attr_show(struct device *dev,
-					     struct device_attribute *attr,
-					     char *page)
-{
-	struct hisi_pmu *hisi_pmu = to_hisi_pmu(dev_get_drvdata(dev));
-
-	return sysfs_emit(page, "0x%08x\n", hisi_pmu->identifier);
-}
-EXPORT_SYMBOL_NS_GPL(hisi_uncore_pmu_identifier_attr_show, HISI_PMU);
-
 static void hisi_uncore_pmu_clear_event_idx(struct hisi_pmu *hisi_pmu, int idx)
 {
 	clear_bit(idx, hisi_pmu->pmu_events.used_mask);
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisilicon/hisi_uncore_pmu.h
index da5cf622c2b0..e12bb4842070 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.h
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.h
@@ -138,6 +138,10 @@ struct hisi_pmu {
 	u32 identifier;
 };
 
+/* Generic implementation of cpumask/identifier group */
+extern const struct attribute_group hisi_pmu_cpumask_attr_group;
+extern const struct attribute_group hisi_pmu_identifier_group;
+
 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);
diff --git a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
index cc78de890316..02c298263f8b 100644
--- a/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_sllc_pmu.c
@@ -344,34 +344,11 @@ static const struct attribute_group hisi_sllc_pmu_v2_events_group = {
 	.attrs = hisi_sllc_pmu_v2_events_attr,
 };
 
-static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
-
-static struct attribute *hisi_sllc_pmu_cpumask_attrs[] = {
-	&dev_attr_cpumask.attr,
-	NULL
-};
-
-static const struct attribute_group hisi_sllc_pmu_cpumask_attr_group = {
-	.attrs = hisi_sllc_pmu_cpumask_attrs,
-};
-
-static struct device_attribute hisi_sllc_pmu_identifier_attr =
-	__ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);
-
-static struct attribute *hisi_sllc_pmu_identifier_attrs[] = {
-	&hisi_sllc_pmu_identifier_attr.attr,
-	NULL
-};
-
-static const struct attribute_group hisi_sllc_pmu_identifier_group = {
-	.attrs = hisi_sllc_pmu_identifier_attrs,
-};
-
 static const struct attribute_group *hisi_sllc_pmu_v2_attr_groups[] = {
 	&hisi_sllc_pmu_v2_format_group,
 	&hisi_sllc_pmu_v2_events_group,
-	&hisi_sllc_pmu_cpumask_attr_group,
-	&hisi_sllc_pmu_identifier_group,
+	&hisi_pmu_cpumask_attr_group,
+	&hisi_pmu_identifier_group,
 	NULL
 };
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
index 2df8976ab4be..f90f752f32dd 100644
--- a/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_uc_pmu.c
@@ -437,34 +437,11 @@ static const struct attribute_group hisi_uc_pmu_events_group = {
 	.attrs = hisi_uc_pmu_events_attr,
 };
 
-static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
-
-static struct attribute *hisi_uc_pmu_cpumask_attrs[] = {
-	&dev_attr_cpumask.attr,
-	NULL,
-};
-
-static const struct attribute_group hisi_uc_pmu_cpumask_attr_group = {
-	.attrs = hisi_uc_pmu_cpumask_attrs,
-};
-
-static struct device_attribute hisi_uc_pmu_identifier_attr =
-	__ATTR(identifier, 0444, hisi_uncore_pmu_identifier_attr_show, NULL);
-
-static struct attribute *hisi_uc_pmu_identifier_attrs[] = {
-	&hisi_uc_pmu_identifier_attr.attr,
-	NULL
-};
-
-static const struct attribute_group hisi_uc_pmu_identifier_group = {
-	.attrs = hisi_uc_pmu_identifier_attrs,
-};
-
 static const struct attribute_group *hisi_uc_pmu_attr_groups[] = {
 	&hisi_uc_pmu_format_group,
 	&hisi_uc_pmu_events_group,
-	&hisi_uc_pmu_cpumask_attr_group,
-	&hisi_uc_pmu_identifier_group,
+	&hisi_pmu_cpumask_attr_group,
+	&hisi_pmu_identifier_group,
 	NULL
 };
 
-- 
2.24.0

[PATCH v2 6/8] drivers/perf: hisi: Export associated CPUs of each PMU through sysfs

[Yicong Yang]

From: Yicong Yang <yangyicong@hisilicon.com>

Although the event of the uncore PMU can only be opened on a single
CPU, some PMU does have the affinity on a range of CPUs. For example
the L3C PMU is associated to the CPUs sharing the L3T it monitors.
Users may infer this affinity by the PMU name which may have SCCL ID
and CCL ID encoded (for L3C etc), but it's not that straightforward.
So export this information by adding an "associated_cpus" sysfs
attribute then user can get this directly.

Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Jonathan Cameron <Joanthan.Cameron@huawei.com>
---
 Documentation/admin-guide/perf/hisi-pmu.rst |  5 ++++-
 drivers/perf/hisilicon/hisi_uncore_pmu.c    | 10 ++++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/Documentation/admin-guide/perf/hisi-pmu.rst b/Documentation/admin-guide/perf/hisi-pmu.rst
index 5cc248d18c63..2b3d5a90c34c 100644
--- a/Documentation/admin-guide/perf/hisi-pmu.rst
+++ b/Documentation/admin-guide/perf/hisi-pmu.rst
@@ -35,7 +35,10 @@ e.g. hisi_sccl1_hha0/rx_operations is RX_OPERATIONS event of HHA index #0 in
 SCCL ID #1.
 
 The driver also provides a "cpumask" sysfs attribute, which shows the CPU core
-ID used to count the uncore PMU event.
+ID used to count the uncore PMU event. An "associated_cpus" sysfs attribute is
+also provided to show the CPUs associated with this PMU. The "cpumask" indicates
+the CPUs to open the events, usually as a hit for userspaces tools like perf.
+It only contains one associated CPU from the "associated_cpus".
 
 Example usage of perf::
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pmu.c
index ac74d8312ee5..b27de6b3f9b4 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -51,8 +51,18 @@ EXPORT_SYMBOL_NS_GPL(hisi_cpumask_sysfs_show, HISI_PMU);
 
 static DEVICE_ATTR(cpumask, 0444, hisi_cpumask_sysfs_show, NULL);
 
+static ssize_t hisi_associated_cpus_sysfs_show(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct hisi_pmu *hisi_pmu = to_hisi_pmu(dev_get_drvdata(dev));
+
+	return cpumap_print_to_pagebuf(true, buf, &hisi_pmu->associated_cpus);
+}
+static DEVICE_ATTR(associated_cpus, 0444, hisi_associated_cpus_sysfs_show, NULL);
+
 static struct attribute *hisi_pmu_cpumask_attrs[] = {
 	&dev_attr_cpumask.attr,
+	&dev_attr_associated_cpus.attr,
 	NULL
 };
 
-- 
2.24.0

[PATCH v2 7/8] drivers/perf: hisi: Fix incorrect variable name "hha_pmu" in DDRC PMU driver

[Yicong Yang]

From: Junhao He <hejunhao3@huawei.com>

In the callback function write_evtype(), the variable name of struct
hisi_pmu should be "ddrc_pmu" instead of "hha_pmu".

Signed-off-by: Junhao He <hejunhao3@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
index 1b8f8b18d1a7..b6b53ead6ac2 100644
--- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
@@ -111,14 +111,14 @@ static void hisi_ddrc_pmu_v2_write_counter(struct hisi_pmu *ddrc_pmu,
  * so there is no need to write event type, while it is programmable counter in
  * PMU v2.
  */
-static void hisi_ddrc_pmu_write_evtype(struct hisi_pmu *hha_pmu, int idx,
+static void hisi_ddrc_pmu_write_evtype(struct hisi_pmu *ddrc_pmu, int idx,
 				       u32 type)
 {
 	u32 offset;
 
-	if (hha_pmu->identifier >= HISI_PMU_V2) {
+	if (ddrc_pmu->identifier >= HISI_PMU_V2) {
 		offset = DDRC_V2_EVENT_TYPE + 4 * idx;
-		writel(type, hha_pmu->base + offset);
+		writel(type, ddrc_pmu->base + offset);
 	}
 }
 
-- 
2.24.0

[PATCH v2 8/8] drivers/perf: hisi: Delete redundant blank line of DDRC PMU

[Yicong Yang]

From: Junhao He <hejunhao3@huawei.com>

Do not add blank line at the end of a code block defined by braces.

Signed-off-by: Junhao He <hejunhao3@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
---
 drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
index b6b53ead6ac2..5286f2215fa6 100644
--- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
@@ -550,7 +550,6 @@ 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);
 
-- 
2.24.0

Re: [PATCH v2 1/8] drivers/perf: hisi: Define a symbol namespace for HiSilicon Uncore PMUs

[Jonathan Cameron]

On Tue, 22 Oct 2024 22:52:58 +0800
Yicong Yang <yangyicong@huawei.com> wrote:

> From: Yicong Yang <yangyicong@hisilicon.com>
> 
> The HiSilicon Uncore PMU framework implements some common functions
> and exported them to the drivers. Use a specific HISI_PMU namespace
> for the exported symbols to avoid pollute the generic ones.
> 
> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Re: [PATCH v2 5/8] drivers/perf: hisi: Provide a generic implementation of cpumask/identifier

[Jonathan Cameron]

On Tue, 22 Oct 2024 22:53:02 +0800
Yicong Yang <yangyicong@huawei.com> wrote:

> From: Yicong Yang <yangyicong@hisilicon.com>
> 
> Each type of HiSilicon Uncore PMU has the following sysfs attributes:
> 
> - format: bitmask in perf_event_attr::config[012] of corresponding
>   attribute
> - event: events name and corresponding event code
> - cpumask: range of CPUs the events can be opened on
> - identifier: the version of this PMU
> 
> Different types of PMU have different implementations of the "format"
> and "event" but all share the same implementation of the "cpumask"
> and "identifier". Thus we can move cpumask and identifier to the
> hisi_uncore_pmu framework and drivers can use the generic
> implementation.
> 
> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>

One trivial unrelated white space change crept in to drop if you end up
respinning for some other reason.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

> diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
> index c47d33ccb489..742fb67d8a02 100644
> --- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
> +++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c

>  
> @@ -485,6 +462,7 @@ static int hisi_hha_pmu_dev_probe(struct platform_device *pdev,
>  		hha_pmu->pmu_events.attr_groups = hisi_hha_pmu_v1_attr_groups;
>  		hha_pmu->num_counters = HHA_V1_NR_COUNTERS;
>  	}
> +
stray change.

>  	hha_pmu->ops = &hisi_uncore_hha_ops;
>  	hha_pmu->dev = &pdev->dev;
>  	hha_pmu->on_cpu = -1;