[libvirt] [PATCH v5 2/4] qemu: Add PCI-Express root to ARM virt machine

[Pavel Fedin]

 Hello!

> >So every ARM qemu with the "virt" machine type supports both PCI and
> >multiqueue?

Every ARM qemu with "virt" machine AND pci-generic supports them.

>>  How about those "virt-*" for which you check below.  That
> >might not be related, I'm just curious.

 Actually mainstream qemu doesn't have "virt-" at all. Commit message where this has been introduced
says that this is reserved for distro maintainers. And everywhere "virt-" has been added as an alias
for "virt", so i just followed this policy.
 What these "virt-" machines really do, depends on their authors. I simply don't know.

> >Few questions here.  a) how "temporary" is this since you're not
> >removing it in this series?

 Well, we could discuss it. Personally, i don't have much time to work on the test suite, to tell
the truth... But, i know, no developer likes documenting and/or testing :)

> > b) for what tests you need this hack

 For every qemu-related tests. If you want to see it, you can omit the condition and run "make
check", the first qemu test will crash upon NULL dereference in virQEMUCapsCacheLookup().

> > and what part of the below is the hack?

 The hack is "if (driver->qemuCapsCache)" check. Our test suite does not create the cache, instead
it builds "caps" object directly and passes around the pointer to all functions which take it. It is
actually not really difficult to fix this. The test suite should mock up qemuCapsCache too.

Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia