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Tsirkin" , Jason Wang Subject: [PULL V2 09/25] vhost: Add SVQDescState Date: Wed, 20 Jul 2022 17:02:57 +0800 Message-Id: <20220720090313.55169-10-jasowang@redhat.com> In-Reply-To: <20220720090313.55169-1-jasowang@redhat.com> References: <20220720090313.55169-1-jasowang@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 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=170.10.133.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1658307973535100003 From: Eugenio P=C3=A9rez This will allow SVQ to add context to the different queue elements. This patch only store the actual element, no functional change intended. Signed-off-by: Eugenio P=C3=A9rez Reviewed-by: Michael S. Tsirkin Signed-off-by: Jason Wang --- hw/virtio/vhost-shadow-virtqueue.c | 16 ++++++++-------- hw/virtio/vhost-shadow-virtqueue.h | 8 ++++++-- 2 files changed, 14 insertions(+), 10 deletions(-) diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-vi= rtqueue.c index e3afa2b..e4c09e2 100644 --- a/hw/virtio/vhost-shadow-virtqueue.c +++ b/hw/virtio/vhost-shadow-virtqueue.c @@ -256,7 +256,7 @@ static int vhost_svq_add(VhostShadowVirtqueue *svq, con= st struct iovec *out_sg, return -EINVAL; } =20 - svq->ring_id_maps[qemu_head] =3D elem; + svq->desc_state[qemu_head].elem =3D elem; vhost_svq_kick(svq); return 0; } @@ -411,21 +411,21 @@ static VirtQueueElement *vhost_svq_get_buf(VhostShado= wVirtqueue *svq, return NULL; } =20 - if (unlikely(!svq->ring_id_maps[used_elem.id])) { + if (unlikely(!svq->desc_state[used_elem.id].elem)) { qemu_log_mask(LOG_GUEST_ERROR, "Device %s says index %u is used, but it was not available", svq->vdev->name, used_elem.id); return NULL; } =20 - num =3D svq->ring_id_maps[used_elem.id]->in_num + - svq->ring_id_maps[used_elem.id]->out_num; + num =3D svq->desc_state[used_elem.id].elem->in_num + + svq->desc_state[used_elem.id].elem->out_num; last_used_chain =3D vhost_svq_last_desc_of_chain(svq, num, used_elem.i= d); svq->desc_next[last_used_chain] =3D svq->free_head; svq->free_head =3D used_elem.id; =20 *len =3D used_elem.len; - return g_steal_pointer(&svq->ring_id_maps[used_elem.id]); + return g_steal_pointer(&svq->desc_state[used_elem.id].elem); } =20 static void vhost_svq_flush(VhostShadowVirtqueue *svq, @@ -595,7 +595,7 @@ void vhost_svq_start(VhostShadowVirtqueue *svq, VirtIOD= evice *vdev, memset(svq->vring.desc, 0, driver_size); svq->vring.used =3D qemu_memalign(qemu_real_host_page_size(), device_s= ize); memset(svq->vring.used, 0, device_size); - svq->ring_id_maps =3D g_new0(VirtQueueElement *, svq->vring.num); + svq->desc_state =3D g_new0(SVQDescState, svq->vring.num); svq->desc_next =3D g_new0(uint16_t, svq->vring.num); for (unsigned i =3D 0; i < svq->vring.num - 1; i++) { svq->desc_next[i] =3D cpu_to_le16(i + 1); @@ -620,7 +620,7 @@ void vhost_svq_stop(VhostShadowVirtqueue *svq) =20 for (unsigned i =3D 0; i < svq->vring.num; ++i) { g_autofree VirtQueueElement *elem =3D NULL; - elem =3D g_steal_pointer(&svq->ring_id_maps[i]); + elem =3D g_steal_pointer(&svq->desc_state[i].elem); if (elem) { virtqueue_detach_element(svq->vq, elem, 0); } @@ -632,7 +632,7 @@ void vhost_svq_stop(VhostShadowVirtqueue *svq) } svq->vq =3D NULL; g_free(svq->desc_next); - g_free(svq->ring_id_maps); + g_free(svq->desc_state); qemu_vfree(svq->vring.desc); qemu_vfree(svq->vring.used); } diff --git a/hw/virtio/vhost-shadow-virtqueue.h b/hw/virtio/vhost-shadow-vi= rtqueue.h index c132c99..d646c35 100644 --- a/hw/virtio/vhost-shadow-virtqueue.h +++ b/hw/virtio/vhost-shadow-virtqueue.h @@ -15,6 +15,10 @@ #include "standard-headers/linux/vhost_types.h" #include "hw/virtio/vhost-iova-tree.h" =20 +typedef struct SVQDescState { + VirtQueueElement *elem; +} SVQDescState; + /* Shadow virtqueue to relay notifications */ typedef struct VhostShadowVirtqueue { /* Shadow vring */ @@ -47,8 +51,8 @@ typedef struct VhostShadowVirtqueue { /* IOVA mapping */ VhostIOVATree *iova_tree; =20 - /* Map for use the guest's descriptors */ - VirtQueueElement **ring_id_maps; + /* SVQ vring descriptors state */ + SVQDescState *desc_state; =20 /* Next VirtQueue element that guest made available */ VirtQueueElement *next_guest_avail_elem; --=20 2.7.4