asmlinkage void do_nmi(struct pt_regs * regs, long error_code)
{
int cpu = safe_smp_processor_id();
nmi_enter();
add_pda(__nmi_count,1);
if (!nmi_callback(regs, cpu))
default_do_nmi(regs);
nmi_exit();
}
dotraplinkage notrace __kprobes void
do_nmi(struct pt_regs *regs, long error_code)
{
nmi_enter();
inc_irq_stat(__nmi_count);
if (!ignore_nmis)
default_do_nmi(regs);
nmi_exit();
}
int handle_perf_interrupt(struct pt_regs *regs, int fault)
{
int retval;
if (!perf_irq)
panic("Unexpected PERF_COUNT interrupt %d\n", fault);
nmi_enter();
retval = perf_irq(regs, fault);
nmi_exit();
return retval;
}
dotraplinkage notrace __kprobes void
do_nmi(struct pt_regs *regs, long error_code)
{
nmi_enter();
#ifdef CONFIG_X86_32
{ int cpu; cpu = smp_processor_id(); ++nmi_count(cpu); }
#else
add_pda(__nmi_count, 1);
#endif
if (!ignore_nmis)
default_do_nmi(regs);
nmi_exit();
}
void notrace __kprobes
die_nmi(char *str, struct pt_regs *regs, int do_panic)
{
unsigned long flags;
if (notify_die(DIE_NMIWATCHDOG, str, regs, 0, 2, SIGINT) == NOTIFY_STOP)
return;
flags = oops_begin();
printk(KERN_EMERG "%s", str);
printk(" on CPU%d, ip %08lx, registers:\n",
smp_processor_id(), regs->ip);
show_registers(regs);
oops_end(flags, regs, 0);
if (do_panic || panic_on_oops)
panic("Non maskable interrupt");
nmi_exit();
local_irq_enable();
do_exit(SIGBUS);
}
/**
* handle_domain_nmi - Invoke the handler for a HW irq belonging to a domain
* @domain: The domain where to perform the lookup
* @hwirq: The HW irq number to convert to a logical one
* @regs: Register file coming from the low-level handling code
*
* Returns: 0 on success, or -EINVAL if conversion has failed
*/
int handle_domain_nmi(struct irq_domain *domain, unsigned int hwirq,
struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
unsigned int irq;
int ret = 0;
nmi_enter();
irq = irq_find_mapping(domain, hwirq);
/*
* ack_bad_irq is not NMI-safe, just report
* an invalid interrupt.
*/
if (likely(irq))
generic_handle_irq(irq);
else
ret = -EINVAL;
nmi_exit();
set_irq_regs(old_regs);
return ret;
}
