Add a dump of the class and capabilities table to debugfs to assist
with debugging scheduler issues.
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
v2->v3:
* New patch
---
drivers/platform/x86/amd/hfi/hfi.c | 31 ++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/drivers/platform/x86/amd/hfi/hfi.c b/drivers/platform/x86/amd/hfi/hfi.c
index 6c90b50f0a40..6df80f6ac73c 100644
--- a/drivers/platform/x86/amd/hfi/hfi.c
+++ b/drivers/platform/x86/amd/hfi/hfi.c
@@ -13,6 +13,7 @@
#include <linux/acpi.h>
#include <linux/cpu.h>
#include <linux/cpumask.h>
+#include <linux/debugfs.h>
#include <linux/gfp.h>
#include <linux/init.h>
#include <linux/io.h>
@@ -79,6 +80,8 @@ struct amd_hfi_data {
void __iomem *pcc_comm_addr;
struct acpi_subtable_header *pcct_entry;
struct amd_shmem_info *shmem;
+
+ struct dentry *dbgfs_dir;
};
/**
@@ -243,6 +246,8 @@ static void amd_hfi_remove(struct platform_device *pdev)
{
struct amd_hfi_data *dev = platform_get_drvdata(pdev);
+ debugfs_remove_recursive(dev->dbgfs_dir);
+
mutex_destroy(&dev->lock);
}
@@ -400,6 +405,28 @@ static int amd_hfi_metadata_parser(struct platform_device *pdev,
return ret;
}
+static int class_capabilities_show(struct seq_file *s, void *unused)
+{
+ int cpu, idx;
+
+ seq_puts(s, "CPU #\tWLC\tPerf\tEff\n");
+ for_each_present_cpu(cpu) {
+ struct amd_hfi_cpuinfo *hfi_cpuinfo = per_cpu_ptr(&amd_hfi_cpuinfo, cpu);
+
+ seq_printf(s, "%d\t", cpu);
+ for (idx = 0; idx < hfi_cpuinfo->nr_class; idx++) {
+ seq_printf(s, "%s%d\t%d\t%d\n",
+ idx == 0 ? "" : "\t",
+ idx,
+ hfi_cpuinfo->amd_hfi_classes[idx].perf,
+ hfi_cpuinfo->amd_hfi_classes[idx].eff);
+ }
+ }
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(class_capabilities);
+
static int amd_hfi_pm_resume(struct device *dev)
{
int ret, cpu;
@@ -473,6 +500,10 @@ static int amd_hfi_probe(struct platform_device *pdev)
schedule_work(&sched_amd_hfi_itmt_work);
+ amd_hfi_data->dbgfs_dir = debugfs_create_dir("amd_hfi", arch_debugfs_dir);
+ debugfs_create_file("class_capabilities", 0644, amd_hfi_data->dbgfs_dir, pdev,
+ &class_capabilities_fops);
+
return 0;
}
--
2.43.0
