Re: [PATCH 1/3] tests/acceptance: test virtio-ccw revision handling

[Cornelia Huck <cohuck@redhat.com>]

On Fri, 4 Dec 2020 10:36:33 -0300
Wainer dos Santos Moschetta <wainersm@redhat.com> wrote:

> Hi,
> 
> On 11/30/20 3:02 PM, Cornelia Huck wrote:
> > The max_revision prop of virtio-ccw devices can be used to force
> > an older revision for compatibility handling. The easiest way to
> > check this is to force a device to revision 0, which turns off
> > virtio-1.
> >
> > Signed-off-by: Cornelia Huck <cohuck@redhat.com>
> > ---
> >   tests/acceptance/machine_s390_ccw_virtio.py | 18 ++++++++++++++++--
> >   1 file changed, 16 insertions(+), 2 deletions(-)
> >
> > diff --git a/tests/acceptance/machine_s390_ccw_virtio.py b/tests/acceptance/machine_s390_ccw_virtio.py
> > index db6352c44434..683b6e0dac2e 100644
> > --- a/tests/acceptance/machine_s390_ccw_virtio.py
> > +++ b/tests/acceptance/machine_s390_ccw_virtio.py
> > @@ -51,6 +51,10 @@ class S390CCWVirtioMachine(Test):
> >                            '-initrd', initrd_path,
> >                            '-append', kernel_command_line,
> >                            '-device', 'virtio-net-ccw,devno=fe.1.1111',
> > +                         '-device',
> > +                         'virtio-rng-ccw,devno=fe.2.0000,max_revision=0',
> > +                         '-device',
> > +                         'virtio-rng-ccw,devno=fe.3.1234,max_revision=2',
> >                            '-device', 'zpci,uid=5,target=zzz',
> >                            '-device', 'virtio-net-pci,id=zzz')
> >           self.vm.launch()
> > @@ -60,9 +64,19 @@ class S390CCWVirtioMachine(Test):
> >           # first debug shell is too early, we need to wait for device detection
> >           exec_command_and_wait_for_pattern(self, 'exit', shell_ready)
> >   
> > -        ccw_bus_id="0.1.1111"
> > +        ccw_bus_ids="0.1.1111  0.2.0000  0.3.1234"
> >           pci_bus_id="0005:00:00.0"
> >           exec_command_and_wait_for_pattern(self, 'ls /sys/bus/ccw/devices/',
> > -                                          ccw_bus_id)
> > +                                          ccw_bus_ids)
> >           exec_command_and_wait_for_pattern(self, 'ls /sys/bus/pci/devices/',
> >                                             pci_bus_id)
> > +        # check that the device at 0.2.0000 is in legacy mode, while the
> > +        # device at 0.3.1234 has the virtio-1 feature bit set
> > +        virtio_rng_features="0000000000000000000000000000110010000000000000000000000000000000"
> > +        virtio_rng_features_legacy="0000000000000000000000000000110000000000000000000000000000000000"  
> 
> Do something like...
> 
> virtio_rng_features="0000000000000000000000000000" + \
>      "110010000000000000000000000000000000"
> 
> ... and checkpatch should not complain.

Yes, I can tweak it like that before queuing.

> 
> 
> Reviewed-by: Wainer dos Santos Moschetta <wainersm@redhat.com>

Thanks!

> 
> 
> > +        exec_command_and_wait_for_pattern(self,
> > +                                          'cat /sys/bus/ccw/devices/0.2.0000/virtio?/features',
> > +                                          virtio_rng_features_legacy)
> > +        exec_command_and_wait_for_pattern(self,
> > +                                          'cat /sys/bus/ccw/devices/0.3.1234/virtio?/features',
> > +                                          virtio_rng_features)