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