There's no reason for the files to have qemuxml2xmlout- prefix
since they all live under qemuxml2xmloutdata directory.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Our test data used a lot of different qemu binary paths and some
of them were based on downstream systems.

Note that there is one file where I had to add "accel=kvm" because
the qemuargv2xml code parses "/usr/bin/kvm" as virt type="kvm".
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

Rather than only assigning a PCI address when no address is given at
all, also do it when the config says that the address type is 'pci',
but it gives no address (virDeviceInfoPCIAddressWanted()).

There are also several places after parsing but prior to address
assignment where code previously expected that any info with address
type='pci' would have a *valid* PCI address, which isn't always the
case - now we check not only for type='pci', but also for a valid
address (virDeviceInfoPCIAddressPresent()).

The test case added in this patch was directly copied from Cole's patch titled:

    qemu: Wire up address type=pci auto_allocate

The vram attribute was introduced to set the video memory but it is
usable only for few hypervisors excluding QEMU/KVM and the old XEN
driver. Only in case of QEMU the vram was used for QXL.

This patch updates the documentation to reflect current code in libvirt
and also changes the cases when we will set the default vram attribute.
It also fixes existing strange default value for VGA devices 9MB to 16MB
because the video ram should be rounded to power of two.

The change of default value could affect migrations but I found out that
QEMU always round the video ram to power of two internally so it's safe
to change the default value to the next closest power of two and also
silently correct every domain XML definition. And it's also safe because
we don't pass the value to QEMU.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1076098Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

Add a "dry run" address allocation to figure out how many bridges
will be needed for all the devices without explicit addresses.

Auto-add just enough bridges to put all the devices on, or up to the
bridge with the largest specified index.