freebsd/xen: pcifront: bypass irq routing on guest

[sanket hase]

Hi,

I want to disable irq routing table on guest-OS ( freebsd domU )so that it can
contact host OS to get interrupts.
Can anyone tell me , how irq routing on x86 is done in freebsd.

I want to "bypass/disable" that function or rather replace it with some
of my routine which makes guest os  conatct host os (dom0 )

Can you please tell me where exactly this code/interface resides?

Thanks,
Sanket