Re: [Qemu-devel] [PATCH v3 3/6] tests/device-plug: Add a simple PCI unplug request test

[Cornelia Huck <cohuck@redhat.com>]

On Mon, 18 Feb 2019 10:21:59 +0100
David Hildenbrand <david@redhat.com> wrote:

> The issue with testing asynchronous unplug requests it that they usually
> require a running guest to handle the request. However, to test if
> unplug of PCI devices works, we can apply a nice little trick on some
> architectures:
> 
> On system reset, x86 ACPI, s390x and spapr will perform the unplug,
> resulting in the device of interest to get deleted and a DEVICE_DELETED
> event getting sent.
> 
> On s390x, we still get a warning
>     qemu-system-s390x: -device virtio-mouse-pci,id=dev0:
>     warning: Plugging a PCI/zPCI device without the 'zpci' CPU feature
>     enabled; the guest will not be able to see/use this device
> 
> This will be fixed soon, when we enable the zpci CPU feature always
> (Conny already has a patch for this queued).

Let's see which series makes it into mainline first ;)

> 
> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
> Reviewed-by: Greg Kurz <groug@kaod.org>
> Reviewed-by: Thomas Huth <thuth@redhat.com>
> Reviewed-by: Collin Walling <walling@linux.ibm.com>
> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
> Signed-off-by: David Hildenbrand <david@redhat.com>
> ---
>  tests/Makefile.include   |  4 ++
>  tests/device-plug-test.c | 93 ++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 97 insertions(+)
>  create mode 100644 tests/device-plug-test.c

Looks sane at a glance.

Acked-by: Cornelia Huck <cohuck@redhat.com>