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bh=6apyqZZ19wN+l2UaInpfg/+01UilPFGVwxMDnB8RP54=; b=aFTdLtLOXpZlXJbZ/6nfmzcrqA24r1IwSpFtWTLU4Q6EjbuODpp6JhW/Zqfjwg/ut92NU6 wwqiro8vFfUIMWP6ILBU3eesodZ4LcmnudQSASoFWAbDDQYfTSIFRPWxAKRciv4tOuka66 MvkAc8HpULM3eehecvhOPojk9YHv9aI= X-MC-Unique: QrbVj6CoO8uKxg8WchdkPw-1 From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= To: qemu-devel@nongnu.org Subject: [RFC v3 10/29] virtio: Add vhost_shadow_vq_get_vring_addr Date: Wed, 19 May 2021 18:28:44 +0200 Message-Id: <20210519162903.1172366-11-eperezma@redhat.com> In-Reply-To: <20210519162903.1172366-1-eperezma@redhat.com> References: <20210519162903.1172366-1-eperezma@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 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=216.205.24.124; envelope-from=eperezma@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.39, 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 , Michael Lilja , Stefano Garzarella Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) It reports the shadow virtqueue address from qemu virtual address space Signed-off-by: Eugenio P=C3=A9rez --- hw/virtio/vhost-shadow-virtqueue.h | 4 +++ hw/virtio/vhost-shadow-virtqueue.c | 46 ++++++++++++++++++++++++++++++ 2 files changed, 50 insertions(+) diff --git a/hw/virtio/vhost-shadow-virtqueue.h b/hw/virtio/vhost-shadow-vi= rtqueue.h index 2ca4b92b12..725091bc97 100644 --- a/hw/virtio/vhost-shadow-virtqueue.h +++ b/hw/virtio/vhost-shadow-virtqueue.h @@ -19,6 +19,10 @@ typedef struct VhostShadowVirtqueue VhostShadowVirtqueue; =20 void vhost_shadow_vq_mask(VhostShadowVirtqueue *svq, EventNotifier *masked= ); void vhost_shadow_vq_unmask(VhostShadowVirtqueue *svq); +void vhost_shadow_vq_get_vring_addr(const VhostShadowVirtqueue *svq, + struct vhost_vring_addr *addr); +size_t vhost_shadow_vq_driver_area_size(const VhostShadowVirtqueue *svq); +size_t vhost_shadow_vq_device_area_size(const VhostShadowVirtqueue *svq); =20 bool vhost_shadow_vq_start(struct vhost_dev *dev, unsigned idx, diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-vi= rtqueue.c index c22acb4605..ff50f12410 100644 --- a/hw/virtio/vhost-shadow-virtqueue.c +++ b/hw/virtio/vhost-shadow-virtqueue.c @@ -17,6 +17,9 @@ =20 /* Shadow virtqueue to relay notifications */ typedef struct VhostShadowVirtqueue { + /* Shadow vring */ + struct vring vring; + /* Shadow kick notifier, sent to vhost */ EventNotifier kick_notifier; /* Shadow call notifier, sent to vhost */ @@ -114,6 +117,35 @@ void vhost_shadow_vq_unmask(VhostShadowVirtqueue *svq) svq->masked_notifier.n =3D NULL; } =20 +/* + * Get the shadow vq vring address. + * @svq Shadow virtqueue + * @addr Destination to store address + */ +void vhost_shadow_vq_get_vring_addr(const VhostShadowVirtqueue *svq, + struct vhost_vring_addr *addr) +{ + addr->desc_user_addr =3D (uint64_t)svq->vring.desc; + addr->avail_user_addr =3D (uint64_t)svq->vring.avail; + addr->used_user_addr =3D (uint64_t)svq->vring.used; +} + +size_t vhost_shadow_vq_driver_area_size(const VhostShadowVirtqueue *svq) +{ + uint16_t vq_idx =3D virtio_get_queue_index(svq->vq); + size_t desc_size =3D virtio_queue_get_desc_size(svq->vdev, vq_idx); + size_t avail_size =3D virtio_queue_get_avail_size(svq->vdev, vq_idx); + + return ROUND_UP(desc_size + avail_size, qemu_real_host_page_size); +} + +size_t vhost_shadow_vq_device_area_size(const VhostShadowVirtqueue *svq) +{ + uint16_t vq_idx =3D virtio_get_queue_index(svq->vq); + size_t used_size =3D virtio_queue_get_used_size(svq->vdev, vq_idx); + return ROUND_UP(used_size, qemu_real_host_page_size); +} + /* * Restore the vhost guest to host notifier, i.e., disables svq effect. */ @@ -232,6 +264,10 @@ void vhost_shadow_vq_stop(struct vhost_dev *dev, VhostShadowVirtqueue *vhost_shadow_vq_new(struct vhost_dev *dev, int idx) { int vq_idx =3D dev->vq_index + idx; + unsigned num =3D virtio_queue_get_num(dev->vdev, vq_idx); + size_t desc_size =3D virtio_queue_get_desc_size(dev->vdev, vq_idx); + size_t driver_size; + size_t device_size; g_autofree VhostShadowVirtqueue *svq =3D g_new0(VhostShadowVirtqueue, = 1); int r; =20 @@ -251,6 +287,14 @@ VhostShadowVirtqueue *vhost_shadow_vq_new(struct vhost= _dev *dev, int idx) =20 svq->vq =3D virtio_get_queue(dev->vdev, vq_idx); svq->vdev =3D dev->vdev; + driver_size =3D vhost_shadow_vq_driver_area_size(svq); + device_size =3D vhost_shadow_vq_device_area_size(svq); + svq->vring.num =3D num; + svq->vring.desc =3D qemu_memalign(qemu_real_host_page_size, driver_siz= e); + svq->vring.avail =3D (void *)((char *)svq->vring.desc + desc_size); + memset(svq->vring.desc, 0, driver_size); + svq->vring.used =3D qemu_memalign(qemu_real_host_page_size, device_siz= e); + memset(svq->vring.used, 0, device_size); event_notifier_set_handler(&svq->call_notifier, vhost_shadow_vq_handle_call); return g_steal_pointer(&svq); @@ -270,5 +314,7 @@ void vhost_shadow_vq_free(VhostShadowVirtqueue *vq) event_notifier_cleanup(&vq->kick_notifier); event_notifier_set_handler(&vq->call_notifier, NULL); event_notifier_cleanup(&vq->call_notifier); + qemu_vfree(vq->vring.desc); + qemu_vfree(vq->vring.used); g_free(vq); } --=20 2.27.0