From patchwork Fri Dec 24 02:55:39 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshiaki Tamura X-Patchwork-Id: 431471 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.3) with ESMTP id oBO2vZUU019071 for ; Fri, 24 Dec 2010 02:57:36 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752839Ab0LXC5d (ORCPT ); Thu, 23 Dec 2010 21:57:33 -0500 Received: from sh.osrg.net ([192.16.179.4]:53301 "EHLO sh.osrg.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752718Ab0LXC5T (ORCPT ); Thu, 23 Dec 2010 21:57:19 -0500 Received: from fs.osrg.net (postfix@fs.osrg.net [10.0.0.12]) by sh.osrg.net (8.14.3/8.14.3/OSRG-NET) with ESMTP id oBO2uSL8004294; Fri, 24 Dec 2010 11:56:28 +0900 Received: from localhost (hype-nh0.osrg.net [10.72.1.48]) by fs.osrg.net (Postfix) with ESMTP id 1295D3E042A; Fri, 24 Dec 2010 11:56:25 +0900 (JST) From: Yoshiaki Tamura To: kvm@vger.kernel.org, qemu-devel@nongnu.org Cc: avi@redhat.com, anthony@codemonkey.ws, aliguori@us.ibm.com, mtosatti@redhat.com, dlaor@redhat.com, mst@redhat.com, kwolf@redhat.com, ananth@in.ibm.com, psuriset@linux.vnet.ibm.com, vatsa@linux.vnet.ibm.com, stefanha@linux.vnet.ibm.com, ohmura.kei@lab.ntt.co.jp, Yoshiaki Tamura Subject: [PATCH 06/17] virtio: update last_avail_idx when inuse is decreased. Date: Fri, 24 Dec 2010 11:55:39 +0900 Message-Id: <1293159350-30762-7-git-send-email-tamura.yoshiaki@lab.ntt.co.jp> X-Mailer: git-send-email 1.7.1.2 In-Reply-To: <1293159350-30762-1-git-send-email-tamura.yoshiaki@lab.ntt.co.jp> References: <1293159350-30762-1-git-send-email-tamura.yoshiaki@lab.ntt.co.jp> X-Dispatcher: imput version 20070423(IM149) Lines: 49 X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Fri, 24 Dec 2010 02:57:36 +0000 (UTC) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (sh.osrg.net [192.16.179.4]); Fri, 24 Dec 2010 11:56:30 +0900 (JST) X-Virus-Scanned: clamav-milter 0.96.5 at sh X-Virus-Status: Clean Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org diff --git a/hw/virtio.c b/hw/virtio.c index 07dbf86..f915c46 100644 --- a/hw/virtio.c +++ b/hw/virtio.c @@ -72,7 +72,7 @@ struct VirtQueue VRing vring; target_phys_addr_t pa; uint16_t last_avail_idx; - int inuse; + uint16_t inuse; uint16_t vector; void (*handle_output)(VirtIODevice *vdev, VirtQueue *vq); VirtIODevice *vdev; @@ -671,6 +671,7 @@ void virtio_save(VirtIODevice *vdev, QEMUFile *f) qemu_put_be32(f, vdev->vq[i].vring.num); qemu_put_be64(f, vdev->vq[i].pa); qemu_put_be16s(f, &vdev->vq[i].last_avail_idx); + qemu_put_be16s(f, &vdev->vq[i].inuse); if (vdev->binding->save_queue) vdev->binding->save_queue(vdev->binding_opaque, i, f); } @@ -710,6 +711,11 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f) vdev->vq[i].vring.num = qemu_get_be32(f); vdev->vq[i].pa = qemu_get_be64(f); qemu_get_be16s(f, &vdev->vq[i].last_avail_idx); + qemu_get_be16s(f, &vdev->vq[i].inuse); + + /* revert last_avail_idx if there are outstanding emulation. */ + vdev->vq[i].last_avail_idx -= vdev->vq[i].inuse; + vdev->vq[i].inuse = 0; if (vdev->vq[i].pa) { uint16_t nheads;