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Sat, 9 May 2020 03:02:35 +0000 (UTC) Subject: Re: [RFC v2 7/9] virito-pci: implement queue_enabled method To: Cindy Lu , mst@redhat.com, armbru@redhat.com, eblake@redhat.com, cohuck@redhat.com References: <20200508163218.22592-1-lulu@redhat.com> <20200508163218.22592-8-lulu@redhat.com> From: Jason Wang Message-ID: Date: Sat, 9 May 2020 11:02:33 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200508163218.22592-8-lulu@redhat.com> Content-Language: en-US X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=205.139.110.61; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/08 22:25:47 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mhabets@solarflare.com, qemu-devel@nongnu.org, rob.miller@broadcom.com, saugatm@xilinx.com, hanand@xilinx.com, hch@infradead.org, eperezma@redhat.com, jgg@mellanox.com, shahafs@mellanox.com, kevin.tian@intel.com, parav@mellanox.com, vmireyno@marvell.com, cunming.liang@intel.com, gdawar@xilinx.com, jiri@mellanox.com, xiao.w.wang@intel.com, stefanha@redhat.com, zhihong.wang@intel.com, aadam@redhat.com, rdunlap@infradead.org, maxime.coquelin@redhat.com, lingshan.zhu@intel.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 2020/5/9 上午12:32, Cindy Lu wrote: > From: Jason Wang > > With version 1, we can detect whether a queue is enabled via > queue_enabled. > > Signed-off-by: Jason Wang This patch should come before any vhost-vdpa patch. Thanks > --- > 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 c6b47a9c73..4aaf5d953e 100644 > --- a/hw/virtio/virtio-pci.c > +++ b/hw/virtio/virtio-pci.c > @@ -1103,6 +1103,18 @@ static AddressSpace *virtio_pci_get_dma_as(DeviceState *d) > return pci_get_address_space(dev); > } > > +static bool virtio_pci_queue_enabled(DeviceState *d, int n) > +{ > + VirtIOPCIProxy *proxy = VIRTIO_PCI(d); > + VirtIODevice *vdev = 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) != 0; > +} > + > static int virtio_pci_add_mem_cap(VirtIOPCIProxy *proxy, > struct virtio_pci_cap *cap) > { > @@ -2053,6 +2065,7 @@ static void virtio_pci_bus_class_init(ObjectClass *klass, void *data) > k->ioeventfd_enabled = virtio_pci_ioeventfd_enabled; > k->ioeventfd_assign = virtio_pci_ioeventfd_assign; > k->get_dma_as = virtio_pci_get_dma_as; > + k->queue_enabled = virtio_pci_queue_enabled; > } > > static const TypeInfo virtio_pci_bus_info = {