On 07/11/2010 09:26 PM, Alex Williamson wrote:
On Sun, 2010-07-11 at 21:14 +0300, Avi Kivity wrote:
On 07/11/2010 09:09 PM, Alex Williamson wrote:
For device assignment, we need to know when the VM writes an end
of interrupt to the APIC, which allows us to de-assert the interrupt
line and clear the DisINTx bit. Add a new wrapper for ioapic
generated interrupts with a callback on eoi and create an interface
for drivers to be notified on eoi.
You aren't going to get this with kvm's in-kernel irqchip, so we need a
new interface there.
Registering an eventfd for the eoi seems like a reasonable alternative.
I'm worried about that racing (with what?)
I also need to figure out how to avoid bouncing the vfio interrupt
events through qemu, but it's a functional start. Thanks,
I thought the scheduler has/wants to have something that moves the irq
to whatever thread it wakes up. With irqfd, it would flow naturally.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
