From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49497) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c4Uhq-0004ml-Co for qemu-devel@nongnu.org; Wed, 09 Nov 2016 10:22:31 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1c4Uhn-0006KM-6m for qemu-devel@nongnu.org; Wed, 09 Nov 2016 10:22:30 -0500 Received: from mail-wm0-x241.google.com ([2a00:1450:400c:c09::241]:33033) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1c4Uhm-0006IS-W6 for qemu-devel@nongnu.org; Wed, 09 Nov 2016 10:22:27 -0500 Received: by mail-wm0-x241.google.com with SMTP id u144so29901919wmu.0 for ; Wed, 09 Nov 2016 07:22:26 -0800 (PST) From: yuri.benditovich@daynix.com Date: Wed, 9 Nov 2016 17:22:00 +0200 Message-Id: <1478704922-3400-2-git-send-email-yuri.benditovich@daynix.com> In-Reply-To: <1478704922-3400-1-git-send-email-yuri.benditovich@daynix.com> References: <1478704922-3400-1-git-send-email-yuri.benditovich@daynix.com> Subject: [Qemu-devel] [PATCH v2 1/3] net: Add virtio queue interface to update used index from vring state List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Michael S . Tsirkin" , Jason Wang , qemu-devel@nongnu.org Cc: dmitry@daynix.com, yan@daynix.com From: Yuri Benditovich Bring virtio queue to correct internal state for host-to-guest operations when vhost is temporary stopped. Signed-off-by: Yuri Benditovich --- hw/virtio/virtio.c | 5 +++++ include/hw/virtio/virtio.h | 1 + 2 files changed, 6 insertions(+) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index d48d1a9..7e1274a 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -1983,6 +1983,11 @@ void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx) vdev->vq[n].shadow_avail_idx = idx; } +void virtio_queue_update_used_idx(VirtIODevice *vdev, int n) +{ + vdev->vq[n].used_idx = vring_used_idx(&vdev->vq[n]); +} + void virtio_queue_invalidate_signalled_used(VirtIODevice *vdev, int n) { vdev->vq[n].signalled_used_valid = false; diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index b913aac..b9a9d6e 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -260,6 +260,7 @@ hwaddr virtio_queue_get_ring_size(VirtIODevice *vdev, int n); uint16_t virtio_queue_get_last_avail_idx(VirtIODevice *vdev, int n); void virtio_queue_set_last_avail_idx(VirtIODevice *vdev, int n, uint16_t idx); void virtio_queue_invalidate_signalled_used(VirtIODevice *vdev, int n); +void virtio_queue_update_used_idx(VirtIODevice *vdev, int n); VirtQueue *virtio_get_queue(VirtIODevice *vdev, int n); uint16_t virtio_get_queue_index(VirtQueue *vq); EventNotifier *virtio_queue_get_guest_notifier(VirtQueue *vq); -- 1.9.1