* qemu-kvm: plan for MSI-X
@ 2009-06-30 10:53 Michael S. Tsirkin
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From: Michael S. Tsirkin @ 2009-06-30 10:53 UTC (permalink / raw)
To: Anthony Liguori, kvm, avi, dlaor, mtosatti
So, now MSI-X is in upstream qemu. The issue here is that irqchip in
kernel is still unsupported. So here's the plan for qemu-kvm:
1. on next merge from qemu.git to qemu.kvm, virtio net will be broken
2. a quick work-around is to replace this line in hw/apic.c:
msix_supported = 1;
with
if (!kvm_enabled() || !qemu_kvm_irqchip_in_kernel())
msix_supported = 1;
3. once that is merged, I'll add a patch for kernel msi-x that is
qemu-kvm specific.
4. Overall it is unfortunate that we still need to add qemu-kvm specific
hacks in new code. Is someone working on upstreaming irqchip btw?
Comments? Avi?
--
MST
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