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66 lines
1.3 KiB
66 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* MIPS specific sysrq operations. |
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* |
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* Copyright (C) 2015 Imagination Technologies Ltd. |
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*/ |
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#include <linux/init.h> |
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#include <linux/smp.h> |
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#include <linux/spinlock.h> |
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#include <linux/sysrq.h> |
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#include <linux/workqueue.h> |
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#include <asm/cpu-features.h> |
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#include <asm/mipsregs.h> |
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#include <asm/tlbdebug.h> |
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/* |
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* Dump TLB entries on all CPUs. |
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*/ |
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static DEFINE_SPINLOCK(show_lock); |
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static void sysrq_tlbdump_single(void *dummy) |
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{ |
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unsigned long flags; |
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spin_lock_irqsave(&show_lock, flags); |
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pr_info("CPU%d:\n", smp_processor_id()); |
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dump_tlb_regs(); |
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pr_info("\n"); |
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dump_tlb_all(); |
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pr_info("\n"); |
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spin_unlock_irqrestore(&show_lock, flags); |
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} |
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#ifdef CONFIG_SMP |
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static void sysrq_tlbdump_othercpus(struct work_struct *dummy) |
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{ |
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smp_call_function(sysrq_tlbdump_single, NULL, 0); |
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} |
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static DECLARE_WORK(sysrq_tlbdump, sysrq_tlbdump_othercpus); |
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#endif |
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static void sysrq_handle_tlbdump(int key) |
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{ |
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sysrq_tlbdump_single(NULL); |
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#ifdef CONFIG_SMP |
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schedule_work(&sysrq_tlbdump); |
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#endif |
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} |
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static const struct sysrq_key_op sysrq_tlbdump_op = { |
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.handler = sysrq_handle_tlbdump, |
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.help_msg = "show-tlbs(x)", |
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.action_msg = "Show TLB entries", |
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.enable_mask = SYSRQ_ENABLE_DUMP, |
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}; |
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static int __init mips_sysrq_init(void) |
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{ |
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return register_sysrq_key('x', &sysrq_tlbdump_op); |
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} |
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arch_initcall(mips_sysrq_init);
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