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| author |   Mario Limonciello <mario.limonciello@amd.com> | 2025-06-09 15:05:18 -0500 |
|---|---|---|
| committer |   Borislav Petkov (AMD) <bp@alien8.de> | 2025-07-07 22:35:51 +0200 |
| commit | f12682148262aa6deed32c0593c67658573d0600 (patch) | |
| tree | cb4ddedc71a1233f81c8c2ccca0036ae3853f208 | |
| parent | platform/x86/amd: hfi: Add debugfs support (diff) | |
| download | wireguard-linux-f12682148262aa6deed32c0593c67658573d0600.tar.xz wireguard-linux-f12682148262aa6deed32c0593c67658573d0600.zip | |
x86/itmt: Add debugfs file to show core priorities
Multiple drivers can report priorities to ITMT. To aid in debugging
any issues with the values reported by drivers introduce a debugfs
file to read out the values.
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/20250609200518.3616080-14-superm1@kernel.org
| -rw-r--r-- | arch/x86/kernel/itmt.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/x86/kernel/itmt.c b/arch/x86/kernel/itmt.c index 9cea1fc36c18..243a769fdd97 100644 --- a/arch/x86/kernel/itmt.c +++ b/arch/x86/kernel/itmt.c @@ -59,6 +59,18 @@ static ssize_t sched_itmt_enabled_write(struct file *filp, return result; } +static int sched_core_priority_show(struct seq_file *s, void *unused) +{ + int cpu; + + seq_puts(s, "CPU #\tPriority\n"); + for_each_possible_cpu(cpu) + seq_printf(s, "%d\t%d\n", cpu, arch_asym_cpu_priority(cpu)); + + return 0; +} +DEFINE_SHOW_ATTRIBUTE(sched_core_priority); + static const struct file_operations dfs_sched_itmt_fops = { .read = debugfs_read_file_bool, .write = sched_itmt_enabled_write, @@ -67,6 +79,7 @@ static const struct file_operations dfs_sched_itmt_fops = { }; static struct dentry *dfs_sched_itmt; +static struct dentry *dfs_sched_core_prio; /** * sched_set_itmt_support() - Indicate platform supports ITMT @@ -102,6 +115,14 @@ int sched_set_itmt_support(void) return -ENOMEM; } + dfs_sched_core_prio = debugfs_create_file("sched_core_priority", 0644, + arch_debugfs_dir, NULL, + &sched_core_priority_fops); + if (IS_ERR_OR_NULL(dfs_sched_core_prio)) { + dfs_sched_core_prio = NULL; + return -ENOMEM; + } + sched_itmt_capable = true; sysctl_sched_itmt_enabled = 1; @@ -133,6 +154,8 @@ void sched_clear_itmt_support(void) debugfs_remove(dfs_sched_itmt); dfs_sched_itmt = NULL; + debugfs_remove(dfs_sched_core_prio); + dfs_sched_core_prio = NULL; if (sysctl_sched_itmt_enabled) { /* disable sched_itmt if we are no longer ITMT capable */ |