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- /*
- * debugfs ops for process ASIDs
- *
- * Copyright (C) 2000, 2001 Paolo Alberelli
- * Copyright (C) 2003 - 2008 Paul Mundt
- * Copyright (C) 2003, 2004 Richard Curnow
- *
- * Provides a debugfs file that lists out the ASIDs currently associated
- * with the processes.
- *
- * In the SH-5 case, if the DM.PC register is examined through the debug
- * link, this shows ASID + PC. To make use of this, the PID->ASID
- * relationship needs to be known. This is primarily for debugging.
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- */
- #include <linux/init.h>
- #include <linux/debugfs.h>
- #include <linux/seq_file.h>
- #include <linux/spinlock.h>
- #include <linux/sched/signal.h>
- #include <linux/sched/task.h>
- #include <asm/processor.h>
- #include <asm/mmu_context.h>
- static int asids_debugfs_show(struct seq_file *file, void *iter)
- {
- struct task_struct *p;
- read_lock(&tasklist_lock);
- for_each_process(p) {
- int pid = p->pid;
- if (unlikely(!pid))
- continue;
- if (p->mm)
- seq_printf(file, "%5d : %04lx\n", pid,
- cpu_asid(smp_processor_id(), p->mm));
- }
- read_unlock(&tasklist_lock);
- return 0;
- }
- DEFINE_SHOW_ATTRIBUTE(asids_debugfs);
- static int __init asids_debugfs_init(void)
- {
- debugfs_create_file("asids", S_IRUSR, arch_debugfs_dir, NULL,
- &asids_debugfs_fops);
- return 0;
- }
- device_initcall(asids_debugfs_init);
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