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Message-ID: <20241021180252.3531-14-mario.limonciello@amd.com>
Date: Mon, 21 Oct 2024 13:02:52 -0500
From: Mario Limonciello <mario.limonciello@....com>
To: Borislav Petkov <bp@...en8.de>, Hans de Goede <hdegoede@...hat.com>,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
CC: <x86@...nel.org>, "Gautham R . Shenoy" <gautham.shenoy@....com>, "Mario
Limonciello" <mario.limonciello@....com>, Perry Yuan <perry.yuan@....com>,
<linux-kernel@...r.kernel.org>, <linux-doc@...r.kernel.org>,
<linux-pm@...r.kernel.org>, <platform-driver-x86@...r.kernel.org>, "Shyam
Sundar S K" <Shyam-sundar.S-k@....com>
Subject: [PATCH v4 13/13] platform/x86/amd: hfi: Add debugfs support
Add a dump of the class and capabilities table to debugfs to assist
with debugging scheduler issues.
Signed-off-by: Mario Limonciello <mario.limonciello@....com>
---
v3->v4:
* Drop conditional printing (Ilpo)
v2->v3:
* New patch
---
drivers/platform/x86/amd/hfi/hfi.c | 30 ++++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/drivers/platform/x86/amd/hfi/hfi.c b/drivers/platform/x86/amd/hfi/hfi.c
index 50407ab805169..839007684b049 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>
@@ -75,6 +76,8 @@ struct amd_hfi_data {
void __iomem *pcc_comm_addr;
struct acpi_subtable_header *pcct_entry;
struct amd_shmem_info *shmem;
+
+ struct dentry *dbgfs_dir;
};
/**
@@ -239,6 +242,8 @@ 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);
}
@@ -396,6 +401,27 @@ 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", cpu);
+ for (idx = 0; idx < hfi_cpuinfo->nr_class; idx++) {
+ seq_printf(s, "\t%d\t%d\t%d\n",
+ 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;
@@ -469,6 +495,10 @@ 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
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