#include <asm/nmi.h>
#include <asm/x86_init.h>
-#define NMI_MAX_NAMELEN 16
-struct nmiaction {
- struct list_head list;
- nmi_handler_t handler;
- unsigned int flags;
- char *name;
-};
-
struct nmi_desc {
spinlock_t lock;
struct list_head head;
.lock = __SPIN_LOCK_UNLOCKED(&nmi_desc[1].lock),
.head = LIST_HEAD_INIT(nmi_desc[1].head),
},
+ {
+ .lock = __SPIN_LOCK_UNLOCKED(&nmi_desc[2].lock),
+ .head = LIST_HEAD_INIT(nmi_desc[2].head),
+ },
+ {
+ .lock = __SPIN_LOCK_UNLOCKED(&nmi_desc[3].lock),
+ .head = LIST_HEAD_INIT(nmi_desc[3].head),
+ },
};
return handled;
}
-static int __setup_nmi(unsigned int type, struct nmiaction *action)
+int __register_nmi_handler(unsigned int type, struct nmiaction *action)
{
struct nmi_desc *desc = nmi_to_desc(type);
unsigned long flags;
+ if (!action->handler)
+ return -EINVAL;
+
spin_lock_irqsave(&desc->lock, flags);
/*
* to manage expectations
*/
WARN_ON_ONCE(type == NMI_UNKNOWN && !list_empty(&desc->head));
+ WARN_ON_ONCE(type == NMI_SERR && !list_empty(&desc->head));
+ WARN_ON_ONCE(type == NMI_IO_CHECK && !list_empty(&desc->head));
/*
* some handlers need to be executed first otherwise a fake
spin_unlock_irqrestore(&desc->lock, flags);
return 0;
}
+EXPORT_SYMBOL(__register_nmi_handler);
-static struct nmiaction *__free_nmi(unsigned int type, const char *name)
+void unregister_nmi_handler(unsigned int type, const char *name)
{
struct nmi_desc *desc = nmi_to_desc(type);
struct nmiaction *n;
spin_unlock_irqrestore(&desc->lock, flags);
synchronize_rcu();
- return (n);
}
-
-int register_nmi_handler(unsigned int type, nmi_handler_t handler,
- unsigned long nmiflags, const char *devname)
-{
- struct nmiaction *action;
- int retval = -ENOMEM;
-
- if (!handler)
- return -EINVAL;
-
- action = kzalloc(sizeof(struct nmiaction), GFP_KERNEL);
- if (!action)
- goto fail_action;
-
- action->handler = handler;
- action->flags = nmiflags;
- action->name = kstrndup(devname, NMI_MAX_NAMELEN, GFP_KERNEL);
- if (!action->name)
- goto fail_action_name;
-
- retval = __setup_nmi(type, action);
-
- if (retval)
- goto fail_setup_nmi;
-
- return retval;
-
-fail_setup_nmi:
- kfree(action->name);
-fail_action_name:
- kfree(action);
-fail_action:
-
- return retval;
-}
-EXPORT_SYMBOL_GPL(register_nmi_handler);
-
-void unregister_nmi_handler(unsigned int type, const char *name)
-{
- struct nmiaction *a;
-
- a = __free_nmi(type, name);
- if (a) {
- kfree(a->name);
- kfree(a);
- }
-}
-
EXPORT_SYMBOL_GPL(unregister_nmi_handler);
static __kprobes void
pci_serr_error(unsigned char reason, struct pt_regs *regs)
{
+ /* check to see if anyone registered against these types of errors */
+ if (nmi_handle(NMI_SERR, regs, false))
+ return;
+
pr_emerg("NMI: PCI system error (SERR) for reason %02x on CPU %d.\n",
reason, smp_processor_id());
{
unsigned long i;
+ /* check to see if anyone registered against these types of errors */
+ if (nmi_handle(NMI_IO_CHECK, regs, false))
+ return;
+
pr_emerg(
"NMI: IOCK error (debug interrupt?) for reason %02x on CPU %d.\n",
reason, smp_processor_id());