[PATCH v5 1/5] arm64: Add framework to turn IPI as NMI
Marc Zyngier
maz at kernel.org
Tue Oct 20 06:08:30 EDT 2020
On 2020-10-20 07:43, Sumit Garg wrote:
> On Mon, 19 Oct 2020 at 17:07, Marc Zyngier <maz at kernel.org> wrote:
[...]
>> > +{
>> > + if (!ipi_desc)
>> > + return;
>> > +
>> > + if (is_nmi) {
>> > + if (!prepare_percpu_nmi(ipi_id))
>> > + enable_percpu_nmi(ipi_id, IRQ_TYPE_NONE);
>> > + } else {
>> > + enable_percpu_irq(ipi_id, IRQ_TYPE_NONE);
>>
>> I'm not keen on this. Normal IRQs can't reliably work, so why do you
>> even bother with this?
>
> Yeah I agree but we need to support existing functionality for kgdb
> roundup and sysrq backtrace using normal IRQs as well.
When has this become a requirement? I don't really see the point in
implementing something that is known not to work.
M.
--
Jazz is not dead. It just smells funny...
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