Re: [Qemu-devel] [PATCH v2 00/16] Virtio devices split from virtio-pci

[Juan Quintela <quintela@redhat.com>]

"Michael S. Tsirkin" <mst@redhat.com> wrote:
> On Wed, Nov 28, 2018 at 08:46:15AM +0100, Juan Quintela wrote:
>> "Michael S. Tsirkin" <mst@redhat.com> wrote:
>> > On Mon, Nov 26, 2018 at 08:59:53PM +0100, Juan Quintela wrote:
>> >> Hi
>> >> 
>> >> V2:
>> >> 
>> >> - Rebase on top of master
>> >> 
>> >> Please review.
>> >> 
>> >> Later, Juan.
>> >
>> > And just making sure the point is so that one
>> > can disable virtio-pci and still build virtio?
>> >
>> > And the point of that is mostly as a cleanup on
>> > generic principles, right? Or is there a project that
>> > actually wants to do it?
>> 
>> This allows "make check" to work with them disabled.  Without this
>> changes, introspection fails, because we have the "name" (kind of)
>> "virtio-pci-blk", but not the real virtio device, so it tries to use it
>> while it is not there.  See the equivalent change for virtio-ccw-*.
>> 
>> Thanks, Juan.
>> 
>> PD.  Without this change, you can build a qemu with virtio devices
>>      disabled (i.e. not compiled in), but it fails "make check".  With
>>      the changes, it also works for "make check".
>
> And just to complete the picture the point of that is I guess enabling
> testing of random configs?

Not yet.
But for developing, I try _not_ to compile the bits that I am not
using.  Here I just went for being general.  After this patches, you can
disable  all CONFIG_VIRTIO_* stuff, and "make check" still works.
(Ok CONFIG_VIRTIO_GPU/VGA can't be disable, it needs changes inside the
tests themselves).

Later, Juan.