Re: [Qemu-devel] [PATCH 2/2] Add code to override IRQ 0 to INTI 2

[Anthony Liguori]

Avi Kivity wrote:
> Beth Kon wrote:
> > This patch, provided by Anthony Liguori, maps IRQ0 to INTI2.
> >
> >   
>
> This will cause problems for kvm, which maps interrupts 1:1 without 
> exceptions.  While we could add support for remapping, it would mean 
> that older kernels would not be able to support an hpet.
>
> Isn't it possible to connect the hpet to pic irq 2 and ioapic irq 2, 
> maintaining the 1:1 mapping?

The APIC spec says that the hpet must be connected to APIC IRQ 0 and 
IOAPIC IRQ 2.  I don't understand GSI very well, but I think this is the 
normally remapping of interrupts that would occur as opposed to 
something device specific.

Regards,

Anthony Liguori

> (what's irq 2 connected to now?)