From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- arch/mips/kernel/sysrq.c | 66 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 arch/mips/kernel/sysrq.c (limited to 'arch/mips/kernel/sysrq.c') diff --git a/arch/mips/kernel/sysrq.c b/arch/mips/kernel/sysrq.c new file mode 100644 index 000000000..9c1a20191 --- /dev/null +++ b/arch/mips/kernel/sysrq.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * MIPS specific sysrq operations. + * + * Copyright (C) 2015 Imagination Technologies Ltd. + */ +#include +#include +#include +#include +#include + +#include +#include +#include + +/* + * Dump TLB entries on all CPUs. + */ + +static DEFINE_SPINLOCK(show_lock); + +static void sysrq_tlbdump_single(void *dummy) +{ + unsigned long flags; + + spin_lock_irqsave(&show_lock, flags); + + pr_info("CPU%d:\n", smp_processor_id()); + dump_tlb_regs(); + pr_info("\n"); + dump_tlb_all(); + pr_info("\n"); + + spin_unlock_irqrestore(&show_lock, flags); +} + +#ifdef CONFIG_SMP +static void sysrq_tlbdump_othercpus(struct work_struct *dummy) +{ + smp_call_function(sysrq_tlbdump_single, NULL, 0); +} + +static DECLARE_WORK(sysrq_tlbdump, sysrq_tlbdump_othercpus); +#endif + +static void sysrq_handle_tlbdump(int key) +{ + sysrq_tlbdump_single(NULL); +#ifdef CONFIG_SMP + schedule_work(&sysrq_tlbdump); +#endif +} + +static const struct sysrq_key_op sysrq_tlbdump_op = { + .handler = sysrq_handle_tlbdump, + .help_msg = "show-tlbs(x)", + .action_msg = "Show TLB entries", + .enable_mask = SYSRQ_ENABLE_DUMP, +}; + +static int __init mips_sysrq_init(void) +{ + return register_sysrq_key('x', &sysrq_tlbdump_op); +} +arch_initcall(mips_sysrq_init); -- cgit v1.2.3