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[Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback
From: |
Alex Williamson |
Subject: |
[Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback |
Date: |
Sun, 11 Jul 2010 12:26:24 -0600 |
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 also need to figure out how to avoid bouncing the vfio interrupt
events through qemu, but it's a functional start. Thanks,
Alex
- [Qemu-devel] [RFC PATCH 0/5] QEMU VFIO device assignment, Alex Williamson, 2010/07/11
- [Qemu-devel] [RFC PATCH 3/5] RAM API: Make use of it for x86 PC, Alex Williamson, 2010/07/11
- [Qemu-devel] [RFC PATCH 4/5] APIC/IOAPIC EOI callback, Alex Williamson, 2010/07/11
- [Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback, Avi Kivity, 2010/07/11
- [Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback,
Alex Williamson <=
- [Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback, Avi Kivity, 2010/07/11
- [Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback, Michael S. Tsirkin, 2010/07/11
- [Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback, Alex Williamson, 2010/07/11
- [Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback, Michael S. Tsirkin, 2010/07/11
- [Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback, Alex Williamson, 2010/07/11
- [Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback, Michael S. Tsirkin, 2010/07/11
- [Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback, Michael S. Tsirkin, 2010/07/11
- [Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback, Alex Williamson, 2010/07/11
- [Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback, Avi Kivity, 2010/07/12
- [Qemu-devel] Re: [RFC PATCH 4/5] APIC/IOAPIC EOI callback, Gleb Natapov, 2010/07/12