> The following generalizes the NMI callback's needed by things like crash
> dump and debuggers in the same way that panic has notifiers.
> Please apply this since it makes writing and maintaining RAS extensions
> easier. Since there is already a panic_notifier callback, this follows
> the same model.
> + notifier_call_chain(&nmi_notifier_list, 0, regs);
Most debuggers/crash dumpers etc. need a way to veto normal processing of NMIs
and other exceptions. For NMI the usual case is to turn off the nmi watchdog
while you do something slow with interrupts disabled, that requires
doing the hook very early. Without veta NMI notification is not very useful.
You want something like:
if (notifier_call_chain(&nmi_notifier_list, 0, regs) == NOTIFY_BAD)
For a more comprehensive variant see include/asm-x86_64/kdebug.h
The x86-64 variant cannot be 1:1 copied because it's still incomplete
and e.g. does not implement veto for all places where it's needed.
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to email@example.com
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/