From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41419) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zf5Lf-000111-QX for qemu-devel@nongnu.org; Thu, 24 Sep 2015 08:10:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Zf5Lb-0006pc-HO for qemu-devel@nongnu.org; Thu, 24 Sep 2015 08:10:03 -0400 Received: from mga01.intel.com ([192.55.52.88]:33380) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Zf5Lb-0006k4-8h for qemu-devel@nongnu.org; Thu, 24 Sep 2015 08:09:59 -0400 From: Yuanhan Liu Date: Thu, 24 Sep 2015 20:12:12 +0800 Message-Id: <1443096734-20140-6-git-send-email-yuanhan.liu@linux.intel.com> In-Reply-To: <1443096734-20140-1-git-send-email-yuanhan.liu@linux.intel.com> References: <1443096734-20140-1-git-send-email-yuanhan.liu@linux.intel.com> Subject: [Qemu-devel] [PATCH v12 5/7] vhost: introduce vhost_backend_get_vq_index method List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Yuanhan Liu , jasowang@redhat.com, Changchun.ouyang@hotmail.com, mst@redhat.com Subtracting the idx with the base(dev->vq_index) for vhost-kernel, and then adding it back for vhost-user doesn't seem right. Here introduces a new method vhost_backend_get_vq_index() for getting the right vq index for following vhost messages calls. Suggested-by: Jason Wang Signed-off-by: Yuanhan Liu Reviewed-by: Jason Wang Tested-by: Marcel Apfelbaum --- hw/virtio/vhost-backend.c | 10 +++++++++- hw/virtio/vhost-user.c | 12 ++++++++++-- hw/virtio/vhost.c | 15 ++++++--------- include/hw/virtio/vhost-backend.h | 2 ++ 4 files changed, 27 insertions(+), 12 deletions(-) diff --git a/hw/virtio/vhost-backend.c b/hw/virtio/vhost-backend.c index 4d68a27..72d1392 100644 --- a/hw/virtio/vhost-backend.c +++ b/hw/virtio/vhost-backend.c @@ -42,11 +42,19 @@ static int vhost_kernel_cleanup(struct vhost_dev *dev) return close(fd); } +static int vhost_kernel_get_vq_index(struct vhost_dev *dev, int idx) +{ + assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); + + return idx - dev->vq_index; +} + static const VhostOps kernel_ops = { .backend_type = VHOST_BACKEND_TYPE_KERNEL, .vhost_call = vhost_kernel_call, .vhost_backend_init = vhost_kernel_init, - .vhost_backend_cleanup = vhost_kernel_cleanup + .vhost_backend_cleanup = vhost_kernel_cleanup, + .vhost_backend_get_vq_index = vhost_kernel_get_vq_index, }; int vhost_set_backend_type(struct vhost_dev *dev, VhostBackendType backend_type) diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c index 694fde5..5018fd6 100644 --- a/hw/virtio/vhost-user.c +++ b/hw/virtio/vhost-user.c @@ -393,9 +393,17 @@ static int vhost_user_cleanup(struct vhost_dev *dev) return 0; } +static int vhost_user_get_vq_index(struct vhost_dev *dev, int idx) +{ + assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); + + return idx; +} + const VhostOps user_ops = { .backend_type = VHOST_BACKEND_TYPE_USER, .vhost_call = vhost_user_call, .vhost_backend_init = vhost_user_init, - .vhost_backend_cleanup = vhost_user_cleanup - }; + .vhost_backend_cleanup = vhost_user_cleanup, + .vhost_backend_get_vq_index = vhost_user_get_vq_index, +}; diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index a08c36b..7a7812d 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -719,7 +719,7 @@ static int vhost_virtqueue_start(struct vhost_dev *dev, { hwaddr s, l, a; int r; - int vhost_vq_index = idx - dev->vq_index; + int vhost_vq_index = dev->vhost_ops->vhost_backend_get_vq_index(dev, idx); struct vhost_vring_file file = { .index = vhost_vq_index }; @@ -728,7 +728,6 @@ static int vhost_virtqueue_start(struct vhost_dev *dev, }; struct VirtQueue *vvq = virtio_get_queue(vdev, idx); - assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); vq->num = state.num = virtio_queue_get_num(vdev, idx); r = dev->vhost_ops->vhost_call(dev, VHOST_SET_VRING_NUM, &state); @@ -822,12 +821,12 @@ static void vhost_virtqueue_stop(struct vhost_dev *dev, struct vhost_virtqueue *vq, unsigned idx) { - int vhost_vq_index = idx - dev->vq_index; + int vhost_vq_index = dev->vhost_ops->vhost_backend_get_vq_index(dev, idx); struct vhost_vring_state state = { .index = vhost_vq_index, }; int r; - assert(idx >= dev->vq_index && idx < dev->vq_index + dev->nvqs); + r = dev->vhost_ops->vhost_call(dev, VHOST_GET_VRING_BASE, &state); if (r < 0) { fprintf(stderr, "vhost VQ %d ring restore failed: %d\n", idx, r); @@ -1066,17 +1065,15 @@ void vhost_virtqueue_mask(struct vhost_dev *hdev, VirtIODevice *vdev, int n, { struct VirtQueue *vvq = virtio_get_queue(vdev, n); int r, index = n - hdev->vq_index; + struct vhost_vring_file file; - assert(n >= hdev->vq_index && n < hdev->vq_index + hdev->nvqs); - - struct vhost_vring_file file = { - .index = index - }; if (mask) { file.fd = event_notifier_get_fd(&hdev->vqs[index].masked_notifier); } else { file.fd = event_notifier_get_fd(virtio_queue_get_guest_notifier(vvq)); } + + file.index = hdev->vhost_ops->vhost_backend_get_vq_index(hdev, n); r = hdev->vhost_ops->vhost_call(hdev, VHOST_SET_VRING_CALL, &file); assert(r >= 0); } diff --git a/include/hw/virtio/vhost-backend.h b/include/hw/virtio/vhost-backend.h index e472f29..e1dfc6d 100644 --- a/include/hw/virtio/vhost-backend.h +++ b/include/hw/virtio/vhost-backend.h @@ -24,12 +24,14 @@ typedef int (*vhost_call)(struct vhost_dev *dev, unsigned long int request, void *arg); typedef int (*vhost_backend_init)(struct vhost_dev *dev, void *opaque); typedef int (*vhost_backend_cleanup)(struct vhost_dev *dev); +typedef int (*vhost_backend_get_vq_index)(struct vhost_dev *dev, int idx); typedef struct VhostOps { VhostBackendType backend_type; vhost_call vhost_call; vhost_backend_init vhost_backend_init; vhost_backend_cleanup vhost_backend_cleanup; + vhost_backend_get_vq_index vhost_backend_get_vq_index; } VhostOps; extern const VhostOps user_ops; -- 1.9.0