blob: 366baef72d297654b4d5722ad8683ca929207b10 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
// SPDX-License-Identifier: GPL-2.0
/*
* LoongArch specific sysrq operations.
*
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
*/
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/spinlock.h>
#include <linux/sysrq.h>
#include <linux/workqueue.h>
#include <asm/cpu-features.h>
#include <asm/tlb.h>
/*
* 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 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 loongarch_sysrq_init(void)
{
return register_sysrq_key('x', &sysrq_tlbdump_op);
}
arch_initcall(loongarch_sysrq_init);
|
