Re: [PATCH v2 5/7] libqos: expose common virtqueue setup/cleanup functions

[Sergio Lopez <slp@redhat.com>]

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Stefan Hajnoczi <stefanha@redhat.com> writes:

> The VIRTIO 1.0 code will need to perform additional steps but it will
> reuse the common virtqueue setup/cleanup code.  Make these functions
> public.
>
> Make sure to invoke callbacks via QVirtioBus instead of directly calling
> the virtio-pci Legacy versions of these functions.
>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> ---
>  tests/libqos/virtio-pci.h |  8 ++++++++
>  tests/libqos/virtio-pci.c | 19 ++++++++++---------
>  2 files changed, 18 insertions(+), 9 deletions(-)
>
> diff --git a/tests/libqos/virtio-pci.h b/tests/libqos/virtio-pci.h
> index 443e53affc..b620c30451 100644
> --- a/tests/libqos/virtio-pci.h
> +++ b/tests/libqos/virtio-pci.h
> @@ -63,4 +63,12 @@ void qvirtio_pci_set_msix_configuration_vector(QVirtioPCIDevice *d,
>                                          QGuestAllocator *alloc, uint16_t entry);
>  void qvirtqueue_pci_msix_setup(QVirtioPCIDevice *d, QVirtQueuePCI *vqpci,
>                                          QGuestAllocator *alloc, uint16_t entry);
> +
> +/* Used by Legacy and Modern virtio-pci code */
> +QVirtQueue *qvirtio_pci_virtqueue_setup_common(QVirtioDevice *d,
> +                                               QGuestAllocator *alloc,
> +                                               uint16_t index);
> +void qvirtio_pci_virtqueue_cleanup_common(QVirtQueue *vq,
> +                                          QGuestAllocator *alloc);
> +
>  #endif
> diff --git a/tests/libqos/virtio-pci.c b/tests/libqos/virtio-pci.c
> index 651f6dbfc6..3fb4af4016 100644
> --- a/tests/libqos/virtio-pci.c
> +++ b/tests/libqos/virtio-pci.c
> @@ -198,8 +198,9 @@ static void qvirtio_pci_set_queue_address(QVirtioDevice *d, QVirtQueue *vq)
>      qpci_io_writel(dev->pdev, dev->bar, VIRTIO_PCI_QUEUE_PFN, pfn);
>  }
>  
> -static QVirtQueue *qvirtio_pci_virtqueue_setup(QVirtioDevice *d,
> -                                        QGuestAllocator *alloc, uint16_t index)
> +QVirtQueue *qvirtio_pci_virtqueue_setup_common(QVirtioDevice *d,
> +                                               QGuestAllocator *alloc,
> +                                               uint16_t index)
>  {
>      uint32_t feat;
>      uint64_t addr;
> @@ -207,11 +208,11 @@ static QVirtQueue *qvirtio_pci_virtqueue_setup(QVirtioDevice *d,
>      QVirtioPCIDevice *qvpcidev = container_of(d, QVirtioPCIDevice, vdev);
>  
>      vqpci = g_malloc0(sizeof(*vqpci));
> -    feat = qvirtio_pci_get_guest_features(d);
> +    feat = d->bus->get_guest_features(d);
>  
> -    qvirtio_pci_queue_select(d, index);
> +    d->bus->queue_select(d, index);
>      vqpci->vq.index = index;
> -    vqpci->vq.size = qvirtio_pci_get_queue_size(d);
> +    vqpci->vq.size = d->bus->get_queue_size(d);
>      vqpci->vq.free_head = 0;
>      vqpci->vq.num_free = vqpci->vq.size;
>      vqpci->vq.align = VIRTIO_PCI_VRING_ALIGN;
> @@ -231,12 +232,12 @@ static QVirtQueue *qvirtio_pci_virtqueue_setup(QVirtioDevice *d,
>      addr = guest_alloc(alloc, qvring_size(vqpci->vq.size,
>                                            VIRTIO_PCI_VRING_ALIGN));
>      qvring_init(qvpcidev->pdev->bus->qts, alloc, &vqpci->vq, addr);
> -    qvirtio_pci_set_queue_address(d, &vqpci->vq);
> +    d->bus->set_queue_address(d, &vqpci->vq);
>  
>      return &vqpci->vq;
>  }
>  
> -static void qvirtio_pci_virtqueue_cleanup(QVirtQueue *vq,
> +void qvirtio_pci_virtqueue_cleanup_common(QVirtQueue *vq,
>                                            QGuestAllocator *alloc)
>  {
>      QVirtQueuePCI *vqpci = container_of(vq, QVirtQueuePCI, vq);
> @@ -266,8 +267,8 @@ static const QVirtioBus qvirtio_pci_legacy = {
>      .queue_select = qvirtio_pci_queue_select,
>      .get_queue_size = qvirtio_pci_get_queue_size,
>      .set_queue_address = qvirtio_pci_set_queue_address,
> -    .virtqueue_setup = qvirtio_pci_virtqueue_setup,
> -    .virtqueue_cleanup = qvirtio_pci_virtqueue_cleanup,
> +    .virtqueue_setup = qvirtio_pci_virtqueue_setup_common,
> +    .virtqueue_cleanup = qvirtio_pci_virtqueue_cleanup_common,
>      .virtqueue_kick = qvirtio_pci_virtqueue_kick,
>  };

Reviewed-by: Sergio Lopez <slp@redhat.com>

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