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bh=dJjJ94MGArmyKMEbsDELwfiFe6wLlepSgX5hwGdr9I0=; b=emQErETWrtKIpkHE7C/AvTcI292zHl2J5k1fD6xhOsnNUy3/SIj58QQ72LBtRcmHokqP0z yIK2DVcMtpIJwu7Enf6eolIAvnGimK7SwAkFb8MzvmoAd1CmN5Re2dgEib7mjVTPgO9oG3 MwKTr+LNVQ0BpgGn5MowasgKOfHjObg= X-MC-Unique: W9jau5NiPqOq6QYkb9g-wg-1 From: Cindy Lu To: mst@redhat.com, armbru@redhat.com, eblake@redhat.com, cohuck@redhat.com, jasowang@redhat.com Subject: [RFC v3 4/8] virtio-pci: implement queue_enabled method Date: Fri, 29 May 2020 22:06:16 +0800 Message-Id: <20200529140620.28759-5-lulu@redhat.com> In-Reply-To: <20200529140620.28759-1-lulu@redhat.com> References: <20200529140620.28759-1-lulu@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; 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charset="utf-8" From: Jason Wang With version 1, we can detect whether a queue is enabled via queue_enabled. Signed-off-by: Jason Wang --- hw/virtio/virtio-pci.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c index 4cb784389c..2c82ed5246 100644 --- a/hw/virtio/virtio-pci.c +++ b/hw/virtio/virtio-pci.c @@ -1107,6 +1107,18 @@ static AddressSpace *virtio_pci_get_dma_as(DeviceSta= te *d) return pci_get_address_space(dev); } =20 +static bool virtio_pci_queue_enabled(DeviceState *d, int n) +{ + VirtIOPCIProxy *proxy =3D VIRTIO_PCI(d); + VirtIODevice *vdev =3D virtio_bus_get_device(&proxy->bus); + + if (virtio_vdev_has_feature(vdev, VIRTIO_F_VERSION_1)) { + return proxy->vqs[vdev->queue_sel].enabled; + } + + return virtio_queue_get_desc_addr(vdev, n) !=3D 0; +} + static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy, struct virtio_pci_cap *cap) { @@ -2059,6 +2071,7 @@ static void virtio_pci_bus_class_init(ObjectClass *kl= ass, void *data) k->ioeventfd_enabled =3D virtio_pci_ioeventfd_enabled; k->ioeventfd_assign =3D virtio_pci_ioeventfd_assign; k->get_dma_as =3D virtio_pci_get_dma_as; + k->queue_enabled =3D virtio_pci_queue_enabled; } =20 static const TypeInfo virtio_pci_bus_info =3D { --=20 2.21.1