[libvirt] [PATCH 2/4] qemu: Use generic PCIe Root Ports by default for aarch64/virt

[Andrea Bolognani]

On Wed, 2017-03-15 at 15:22 -0400, Laine Stump wrote:
> > It was mentioned somewhere, at some point, that we might
> > want to switch to generic PCIe Root Ports for x86/q35
> > guests as well.
> > 
> > It sounds like a good idea to me, and in fact QEMU's sample
> > configuration files for x86/q35 (docs/q35-virtio-*.cfg)
> > already push in that direction; however, I didn't want to
> > risk holding up the aarch64/virt change, which we
> > unquestionably want, because of that, so I will propose it
> > as a separate patch further down the line.
> 
> Personally I'm fine with making it the default for new root ports on any
> machinetype that has it in the capabilities - if anything doesn't work,
> it's a bug and needs to be fixed, and we can't find the things that
> don't work if people aren't using it. In other words "the sooner the
> better". (Aside from that is the fact that the generic root port is
> going to have IO space turned off by default, and we should all be
> switching to that as soon as possible).

I agree with you, let's just change the default for all
architectures and machine types in one fell swoop.

-- 
Andrea Bolognani / Red Hat / Virtualization