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Date: Mon, 1 Sep 2014 18:27:34 +0200
From: Marc =?UTF-8?B?TWFyw60=?= <marc.mari.barcelo@gmail.com>
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Subject: Re: [Qemu-devel] [PATCH v8 5/7] libqos: Added test case for
 configuration changes in virtio-blk test
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To: Greg Kurz <gkurz@linux.vnet.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>, qemu-devel@nongnu.org, Stefan Hajnoczi <stefanha@redhat.com>

El Mon, 1 Sep 2014 18:09:09 +0200
Greg Kurz <gkurz@linux.vnet.ibm.com> escribi=C3=B3:
> On Mon,  1 Sep 2014 12:07:58 +0200
> Marc Mar=C3=AD <marc.mari.barcelo@gmail.com> wrote:
> > Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
> > Signed-off-by: Marc Mar=C3=AD <marc.mari.barcelo@gmail.com>
> > ---
>=20
> Hi Marc,
>=20
> I gave it a try for various host/target combinations involving ppc64
> and x86_64. Here is what I get:
>=20
>         |   x86_64   |    ppc64    | TARGET
>         +------------+-------------+--------
> x86_64  |     OK     | assert  (1) |
> --------+------------+-------------+
> ppc64   | assert (2) | assert  (1) |
> --------+------------+-------------+
> ppc64le |     OK     | assert  (1) |
> --------+------------+-------------+
>   HOST  |
>=20
> where OK means:
>=20
> /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
>=20
> and assert (1) is:
>=20
> tests/virtio-blk-test.c:87:virtio_blk_init: assertion failed: (dev !=3D
> NULL)
>=20
> and assert (2) is:
>=20
> tests/virtio-blk-test.c:171:pci_basic: assertion failed (status =3D=3D
> 0): (2 =3D=3D 0)
>=20
> I will investigate further but the first column in the array ^^ seems
> to indicate that there's some endianness bug.
>=20
> Cheers.
>=20
> --
> 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.

Thanks for your tests
Marc