diff options
| -rw-r--r-- | arch/s390/kernel/wti.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/s390/kernel/wti.c b/arch/s390/kernel/wti.c index da8bbffbed9d..949fdbf0e8b6 100644 --- a/arch/s390/kernel/wti.c +++ b/arch/s390/kernel/wti.c @@ -5,6 +5,8 @@ * Copyright IBM Corp. 2023 */ +#include <linux/cpu.h> +#include <linux/debugfs.h> #include <linux/kallsyms.h> #include <linux/smpboot.h> #include <linux/irq.h> @@ -117,6 +119,26 @@ static void wti_dbf_grace_period(struct wti_state *st) wdi->missed++; } +static int wti_show(struct seq_file *seq, void *v) +{ + struct wti_state *st; + int cpu; + + cpus_read_lock(); + seq_puts(seq, " "); + for_each_online_cpu(cpu) + seq_printf(seq, "CPU%-8d", cpu); + seq_putc(seq, '\n'); + for_each_online_cpu(cpu) { + st = per_cpu_ptr(&wti_state, cpu); + seq_printf(seq, " %10lu", st->dbg.missed); + } + seq_putc(seq, '\n'); + cpus_read_unlock(); + return 0; +} +DEFINE_SHOW_ATTRIBUTE(wti); + static void wti_thread_fn(unsigned int cpu) { struct wti_state *st = per_cpu_ptr(&wti_state, cpu); @@ -143,6 +165,7 @@ static struct smp_hotplug_thread wti_threads = { static int __init wti_init(void) { struct sched_param wti_sched_param = { .sched_priority = MAX_RT_PRIO - 1 }; + struct dentry *wti_dir; struct wti_state *st; int cpu, rc; @@ -168,6 +191,8 @@ static int __init wti_init(void) rc = -EOPNOTSUPP; goto out_subclass; } + wti_dir = debugfs_create_dir("wti", arch_debugfs_dir); + debugfs_create_file("stat", 0400, wti_dir, NULL, &wti_fops); wti_dbg = debug_register("wti", 1, 1, WTI_DBF_LEN); if (!wti_dbg) { rc = -ENOMEM; |