Re: [Qemu-devel] [PATCH 1/5] virtio-pci: use ioeventfd even when KVM is disabled

[Stefan Hajnoczi <stefanha@redhat.com>]

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On Fri, Jun 16, 2017 at 05:12:18PM +0300, Michael S. Tsirkin wrote:
> On Thu, Jun 15, 2017 at 05:38:09PM +0100, Stefan Hajnoczi wrote:
> > Old kvm.ko versions only supported a tiny number of ioeventfds so
> > virtio-pci avoids ioeventfds when kvm_has_many_ioeventfds() returns 0.
> > 
> > Do not check kvm_has_many_ioeventfds() when KVM is disabled since it
> > always returns 0.  Since commit 8c56c1a592b5092d91da8d8943c17777d6462a6f
> > ("memory: emulate ioeventfd") it has been possible to use ioeventfds in
> > qtest or TCG mode.
> > 
> > This patch makes -device virtio-blk-pci,iothread=iothread0 work even
> > when KVM is disabled.
> > 
> > I have tested that virtio-blk-pci works under TCG both with and without
> > iothread.
> > 
> > Cc: Michael S. Tsirkin <mst@redhat.com>
> > Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> 
> 
> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
> 
> Do you want to merge this with the rest of the patchset,
> or should I?

It can go through Kevin's tree as part of this patch series.

Thanks,
Stefan

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