linux/arch/x86/kernel/apic/hw_nmi.c
Russell King 4d7489ffba nmi: x86: convert to generic nmi handler
Convert x86 to use the generic nmi handler code which can be shared
between architectures.

Reviewed-and-tested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2015-07-17 12:23:30 +01:00

59 lines
1.3 KiB
C

/*
* HW NMI watchdog support
*
* started by Don Zickus, Copyright (C) 2010 Red Hat, Inc.
*
* Arch specific calls to support NMI watchdog
*
* Bits copied from original nmi.c file
*
*/
#include <asm/apic.h>
#include <asm/nmi.h>
#include <linux/cpumask.h>
#include <linux/kdebug.h>
#include <linux/notifier.h>
#include <linux/kprobes.h>
#include <linux/nmi.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/seq_buf.h>
#ifdef CONFIG_HARDLOCKUP_DETECTOR
u64 hw_nmi_get_sample_period(int watchdog_thresh)
{
return (u64)(cpu_khz) * 1000 * watchdog_thresh;
}
#endif
#ifdef arch_trigger_all_cpu_backtrace
static void nmi_raise_cpu_backtrace(cpumask_t *mask)
{
apic->send_IPI_mask(mask, NMI_VECTOR);
}
void arch_trigger_all_cpu_backtrace(bool include_self)
{
nmi_trigger_all_cpu_backtrace(include_self, nmi_raise_cpu_backtrace);
}
static int
arch_trigger_all_cpu_backtrace_handler(unsigned int cmd, struct pt_regs *regs)
{
if (nmi_cpu_backtrace(regs))
return NMI_HANDLED;
return NMI_DONE;
}
NOKPROBE_SYMBOL(arch_trigger_all_cpu_backtrace_handler);
static int __init register_trigger_all_cpu_backtrace(void)
{
register_nmi_handler(NMI_LOCAL, arch_trigger_all_cpu_backtrace_handler,
0, "arch_bt");
return 0;
}
early_initcall(register_trigger_all_cpu_backtrace);
#endif