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bh=FYw67uu67UeVGqqO5hsMiaJ7gjP0eH8hnGSHQzqGieE=; b=al31YwSnAAcUDk4w5c0hipwC24+sQNMOJK3e/Np2He2iHPhj9+znsL7y6J3iTxfpKhg54b puS1ZVIw0PoM6OWdJvAW5yPyseLiS4BRiKrYoVnb/CQsvr0B/GS/PTDVc4PHWG1uWqLLOB nXK4uYEvJVbv5mgf1RbPLCKxpAZ1Vxg= X-MC-Unique: SErmOgIiNSuxpQhYdp-cfA-1 From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Subject: [RFC 01/10] virtio: Add virtqueue_set_handler Date: Fri, 29 Jan 2021 21:54:06 +0100 Message-Id: <20210129205415.876290-2-eperezma@redhat.com> In-Reply-To: <20210129205415.876290-1-eperezma@redhat.com> References: <20210129205415.876290-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eperezma@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" 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; Received-SPF: pass client-ip=63.128.21.124; envelope-from=eperezma@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=-0.249, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no 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: Parav Pandit , "Michael S. Tsirkin" , Jason Wang , Juan Quintela , Markus Armbruster , virtualization@lists.linux-foundation.org, Harpreet Singh Anand , Xiao W Wang , Stefan Hajnoczi , Eli Cohen , Stefano Garzarella , Michael Lilja , Jim Harford , Rob Miller Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) This allows qemu to override vq handler. Signed-off-by: Eugenio P=C3=A9rez --- include/hw/virtio/virtio.h | 6 +++--- hw/virtio/virtio.c | 14 ++++++++++++++ 2 files changed, 17 insertions(+), 3 deletions(-) diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index b7ece7a6a8..9b5479e256 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -47,6 +47,8 @@ size_t virtio_feature_get_config_size(VirtIOFeature *feat= ures, uint64_t host_features); =20 typedef struct VirtQueue VirtQueue; +typedef void (*VirtIOHandleOutput)(VirtIODevice *, VirtQueue *); +typedef bool (*VirtIOHandleAIOOutput)(VirtIODevice *, VirtQueue *); =20 #define VIRTQUEUE_MAX_SIZE 1024 =20 @@ -174,9 +176,6 @@ void virtio_error(VirtIODevice *vdev, const char *fmt, = ...) GCC_FMT_ATTR(2, 3); /* Set the child bus name. */ void virtio_device_set_child_bus_name(VirtIODevice *vdev, char *bus_name); =20 -typedef void (*VirtIOHandleOutput)(VirtIODevice *, VirtQueue *); -typedef bool (*VirtIOHandleAIOOutput)(VirtIODevice *, VirtQueue *); - VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size, VirtIOHandleOutput handle_output); =20 @@ -184,6 +183,7 @@ void virtio_del_queue(VirtIODevice *vdev, int n); =20 void virtio_delete_queue(VirtQueue *vq); =20 +void virtqueue_set_handler(VirtQueue *vq, VirtIOHandleOutput handler); void virtqueue_push(VirtQueue *vq, const VirtQueueElement *elem, unsigned int len); void virtqueue_flush(VirtQueue *vq, unsigned int count); diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index b308026596..ebb780fb42 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -1796,6 +1796,20 @@ unsigned int virtqueue_drop_all(VirtQueue *vq) } } =20 +/* + * virtqueue_set_handler: + * @vq The #VirtQueue + * @handler The handler to call on vq event + * Replaces vq handler. + * + * Note: It takes no protection, so make sure no other calls to the handler + * are happening. + */ +void virtqueue_set_handler(VirtQueue *vq, VirtIOHandleOutput handler) +{ + vq->handle_output =3D handler; +} + /* Reading and writing a structure directly to QEMUFile is *awful*, but * it is what QEMU has always done by mistake. We can change it sooner * or later by bumping the version number of the affected vm states. --=20 2.27.0