Add Support for HiSilicon CPA PMU driver. Json file in perf tool
is applied in
https://lore.kernel.org/linux-arm-kernel/[email protected]/.
Change since v4:
- Add hisi_cpa_pmu_enable_pm() for a failed probe.
- Link: https://lore.kernel.org/linux-arm-kernel/[email protected]/
Change since v3:
- Add more explanation for changing CPA PMUs CPU affinity.
- Address the comments from John.
- Link: https://lore.kernel.org/linux-arm-kernel/[email protected]/
Change since v2:
- Associate CPA PMUs with CPUs online, rather than CPUs in the nearest SCCL.
- Move CPA power management to probe and remove function.
- Address the comments from John.
- Link: https://lore.kernel.org/linux-arm-kernel/[email protected]/
Change since v1:
- Address the comments from John.
- Link: https://lore.kernel.org/linux-arm-kernel/[email protected]/
Qi Liu (2):
drivers/perf: hisi: Associate PMUs in SICL with CPUs online
drivers/perf: hisi: Add Support for CPA PMU
drivers/perf/hisilicon/Makefile | 2 +-
drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c | 409 +++++++++++++++++++
drivers/perf/hisilicon/hisi_uncore_pa_pmu.c | 18 +-
drivers/perf/hisilicon/hisi_uncore_pmu.c | 4 +
drivers/perf/hisilicon/hisi_uncore_pmu.h | 1 +
include/linux/cpuhotplug.h | 1 +
6 files changed, 423 insertions(+), 12 deletions(-)
create mode 100644 drivers/perf/hisilicon/hisi_uncore_cpa_pmu.c
--
2.24.0
If a PMU is in a SICL (Super IO cluster), it is not appropriate to
associate this PMU with a CPU die. So we associate it with all CPUs
online, rather than CPUs in the nearest SCCL.
As the firmware of Hip09 platform hasn't been published yet, change
of PMU driver will not influence backwards compatibility between
driver and firmware.
Signed-off-by: Qi Liu <[email protected]>
Reviewed-by: John Garry <[email protected]>
---
drivers/perf/hisilicon/hisi_uncore_pa_pmu.c | 18 +++++++-----------
drivers/perf/hisilicon/hisi_uncore_pmu.c | 4 ++++
drivers/perf/hisilicon/hisi_uncore_pmu.h | 1 +
3 files changed, 12 insertions(+), 11 deletions(-)
diff --git a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
index bad99d149172..a0ee84d97c41 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pa_pmu.c
@@ -258,13 +258,12 @@ static int hisi_pa_pmu_init_data(struct platform_device *pdev,
struct hisi_pmu *pa_pmu)
{
/*
- * Use the SCCL_ID and the index ID to identify the PA PMU,
- * while SCCL_ID is the nearst SCCL_ID from this SICL and
- * CPU core is chosen from this SCCL to manage this PMU.
+ * 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->sccl_id)) {
- dev_err(&pdev->dev, "Cannot read sccl-id!\n");
+ &pa_pmu->sicl_id)) {
+ dev_err(&pdev->dev, "Cannot read sicl-id!\n");
return -EINVAL;
}
@@ -275,6 +274,7 @@ static int hisi_pa_pmu_init_data(struct platform_device *pdev,
}
pa_pmu->ccl_id = -1;
+ pa_pmu->sccl_id = -1;
pa_pmu->base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(pa_pmu->base)) {
@@ -399,13 +399,9 @@ static int hisi_pa_pmu_probe(struct platform_device *pdev)
ret = hisi_pa_pmu_dev_probe(pdev, pa_pmu);
if (ret)
return ret;
- /*
- * PA is attached in SICL and the CPU core is chosen to manage this
- * PMU which is the nearest SCCL, while its SCCL_ID is greater than
- * one with the SICL_ID.
- */
+
name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "hisi_sicl%u_pa%u",
- pa_pmu->sccl_id - 1, pa_pmu->index_id);
+ pa_pmu->sicl_id, pa_pmu->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 358e4e284a62..980b9ee6eb14 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.c
@@ -458,6 +458,10 @@ 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);
diff --git a/drivers/perf/hisilicon/hisi_uncore_pmu.h b/drivers/perf/hisilicon/hisi_uncore_pmu.h
index 7f5841d6f592..96eeddad55ff 100644
--- a/drivers/perf/hisilicon/hisi_uncore_pmu.h
+++ b/drivers/perf/hisilicon/hisi_uncore_pmu.h
@@ -81,6 +81,7 @@ struct hisi_pmu {
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 */
--
2.24.0
On Fri, 15 Apr 2022 18:23:50 +0800, Qi Liu wrote:
> Add Support for HiSilicon CPA PMU driver. Json file in perf tool
> is applied in
> https://lore.kernel.org/linux-arm-kernel/[email protected]/.
>
> Change since v4:
> - Add hisi_cpa_pmu_enable_pm() for a failed probe.
> - Link: https://lore.kernel.org/linux-arm-kernel/[email protected]/
>
> [...]
Applied to will (for-next/perf), thanks!
[1/2] drivers/perf: hisi: Associate PMUs in SICL with CPUs online
https://git.kernel.org/will/c/807907dae970
[2/2] drivers/perf: hisi: Add Support for CPA PMU
https://git.kernel.org/will/c/6b79738b6ed9
Cheers,
--
Will
https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev