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auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=jasowang@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.167, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Parav Pandit , Cindy Lu , "Michael S. Tsirkin" , Juan Quintela , Richard Henderson , Markus Armbruster , Gautam Dawar , virtualization@lists.linux-foundation.org, Eduardo Habkost , Harpreet Singh Anand , Xiao W Wang , Peter Xu , Stefan Hajnoczi , Eli Cohen , Paolo Bonzini , Zhu Lingshan , Eric Blake , Stefano Garzarella Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" 在 2022/1/22 上午4:27, Eugenio Pérez 写道: > Doing that way allows vhost backend to know what address to return. > > Signed-off-by: Eugenio Pérez > --- > hw/virtio/vhost.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c > index 7b03efccec..64b955ba0c 100644 > --- a/hw/virtio/vhost.c > +++ b/hw/virtio/vhost.c > @@ -798,9 +798,10 @@ static int vhost_virtqueue_set_addr(struct vhost_dev *dev, > struct vhost_virtqueue *vq, > unsigned idx, bool enable_log) > { > - struct vhost_vring_addr addr; > + struct vhost_vring_addr addr = { > + .index = idx, > + }; > int r; > - memset(&addr, 0, sizeof(struct vhost_vring_addr)); > > if (dev->vhost_ops->vhost_vq_get_addr) { > r = dev->vhost_ops->vhost_vq_get_addr(dev, &addr, vq); > @@ -813,7 +814,6 @@ static int vhost_virtqueue_set_addr(struct vhost_dev *dev, > addr.avail_user_addr = (uint64_t)(unsigned long)vq->avail; > addr.used_user_addr = (uint64_t)(unsigned long)vq->used; > } I'm a bit lost in the logic above, any reason we need call vhost_vq_get_addr() :) ? Thanks > - addr.index = idx; > addr.log_guest_addr = vq->used_phys; > addr.flags = enable_log ? (1 << VHOST_VRING_F_LOG) : 0; > r = dev->vhost_ops->vhost_set_vring_addr(dev, &addr);