2012/3/29 Alexander Golec <thejfasi at gmail.com>: > My question is: qemu is raising an IRQ with n equal to 42. Does that mean > that the kernel sees IRQ 42 go up? Because it if does, then that's the wrong > irq. Or is it the handler method that actually picks which number IRQ will > go up? At the moment (since we haven't implemented in-kernel VGIC support) QEMU emulates the GIC itself, so the device will raise IRQ 42 (or whatever), and then the emulated GIC will look at priorities and interrupt masks and so on and will either (a) do nothing or (b) raise either the IRQ or FIQ line to a particular CPU. So (when using KVM) the kernel will only see IRQ/FIQ, not the numbered interrupt into the GIC. -- PMM
