Re: [Qemu-devel] [PATCH v8 5/7] libqos: Added test case for configuration changes in virtio-blk test

[Greg Kurz <gkurz@linux.vnet.ibm.com>]

On Mon, 1 Sep 2014 18:27:34 +0200
Marc Marí <marc.mari.barcelo@gmail.com> wrote:

> El Mon, 1 Sep 2014 18:09:09 +0200
> Greg Kurz <gkurz@linux.vnet.ibm.com> escribió:
> > On Mon,  1 Sep 2014 12:07:58 +0200
> > Marc Marí <marc.mari.barcelo@gmail.com> wrote:
> > > Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> > > Signed-off-by: Marc Marí <marc.mari.barcelo@gmail.com>
> > > ---
> > 
> > Hi Marc,
> > 
> > I gave it a try for various host/target combinations involving ppc64
> > and x86_64. Here is what I get:
> > 
> >         |   x86_64   |    ppc64    | TARGET
> >         +------------+-------------+--------
> > x86_64  |     OK     | assert  (1) |
> > --------+------------+-------------+
> > ppc64   | assert (2) | assert  (1) |
> > --------+------------+-------------+
> > ppc64le |     OK     | assert  (1) |
> > --------+------------+-------------+
> >   HOST  |
> > 
> > where OK means:
> > 
> > /virtio/blk/pci/basic: OK
> > /virtio/blk/pci/indirect: OK
> > /virtio/blk/pci/config: OK
> > /virtio/blk/pci/msix: OK
> > /virtio/blk/pci/idx: OK
> > 
> > and assert (1) is:
> > 
> > tests/virtio-blk-test.c:87:virtio_blk_init: assertion failed: (dev !=
> > NULL)
> > 
> > and assert (2) is:
> > 
> > tests/virtio-blk-test.c:171:pci_basic: assertion failed (status ==
> > 0): (2 == 0)
> > 
> > I will investigate further but the first column in the array ^^ seems
> > to indicate that there's some endianness bug.
> > 
> > Cheers.
> > 
> > --
> > Greg
> 
> Hi
> 
> I will also investigate. Just add that with assert (2), status
> is 2, which means status is VIRTIO_BLK_S_UNSUPP, which means "request
> unsupported by host". So, for some reason, ppc64 host does not support
> a simple write request.
> 

Hmmm... ppc64 and ppc64el hosts are exactly the same, except for the
CPU endianness. And virtio block works very well with ppc64 ! :)

--
Greg