From nobody Fri Nov 7 10:24:00 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.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; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=redhat.com Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 154766441349923.549459194213114; Wed, 16 Jan 2019 10:46:53 -0800 (PST) Received: from localhost ([127.0.0.1]:47273 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gjqDE-0005gL-GQ for importer@patchew.org; Wed, 16 Jan 2019 13:46:52 -0500 Received: from eggs.gnu.org ([209.51.188.92]:47376) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gjpzZ-0003fS-DA for qemu-devel@nongnu.org; Wed, 16 Jan 2019 13:32:49 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gjpzY-0007zx-10 for qemu-devel@nongnu.org; Wed, 16 Jan 2019 13:32:45 -0500 Received: from mx1.redhat.com ([209.132.183.28]:50514) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gjpzX-0007ow-La for qemu-devel@nongnu.org; Wed, 16 Jan 2019 13:32:43 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id BA7F37F3F1; Wed, 16 Jan 2019 18:32:32 +0000 (UTC) Received: from dell-per430-12.lab.eng.pek2.redhat.com (dell-per430-12.lab.eng.pek2.redhat.com [10.73.196.55]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2F4325C1B4; Wed, 16 Jan 2019 18:32:25 +0000 (UTC) From: wexu@redhat.com To: wexu@redhat.com, tiwei.bie@intel.com, qemu-devel@nongnu.org Date: Wed, 16 Jan 2019 13:31:16 -0500 Message-Id: <1547663480-547-12-git-send-email-wexu@redhat.com> In-Reply-To: <1547663480-547-1-git-send-email-wexu@redhat.com> References: <1547663480-547-1-git-send-email-wexu@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Wed, 16 Jan 2019 18:32:32 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v2 11/15] virtio: add userspace migration for packed ring X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jasowang@redhat.com, maxime.coquelin@redhat.com, jfreiman@redhat.com, mst@redhat.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" From: Wei Xu Signed-off-by: Wei Xu --- hw/virtio/virtio.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 0bcf8a5..722a4fd 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -2346,6 +2346,13 @@ static bool virtio_virtqueue_needed(void *opaque) return virtio_host_has_feature(vdev, VIRTIO_F_VERSION_1); } =20 +static bool virtio_packed_virtqueue_needed(void *opaque) +{ + VirtIODevice *vdev =3D opaque; + + return virtio_host_has_feature(vdev, VIRTIO_F_RING_PACKED); +} + static bool virtio_ringsize_needed(void *opaque) { VirtIODevice *vdev =3D opaque; @@ -2387,6 +2394,21 @@ static const VMStateDescription vmstate_virtqueue = =3D { } }; =20 +static const VMStateDescription vmstate_packed_virtqueue =3D { + .name =3D "packed_virtqueue_state", + .version_id =3D 1, + .minimum_version_id =3D 1, + .fields =3D (VMStateField[]) { + VMSTATE_BOOL(avail_wrap_counter, struct VirtQueue), + VMSTATE_BOOL(event_wrap_counter, struct VirtQueue), + VMSTATE_BOOL(used_wrap_counter, struct VirtQueue), + VMSTATE_UINT16(used_idx, struct VirtQueue), + VMSTATE_UINT16(shadow_avail_idx, struct VirtQueue), + VMSTATE_UINT32(inuse, struct VirtQueue), + VMSTATE_END_OF_LIST() + } +}; + static const VMStateDescription vmstate_virtio_virtqueues =3D { .name =3D "virtio/virtqueues", .version_id =3D 1, @@ -2399,6 +2421,18 @@ static const VMStateDescription vmstate_virtio_virtq= ueues =3D { } }; =20 +static const VMStateDescription vmstate_virtio_packed_virtqueues =3D { + .name =3D "virtio/packed_virtqueues", + .version_id =3D 1, + .minimum_version_id =3D 1, + .needed =3D &virtio_packed_virtqueue_needed, + .fields =3D (VMStateField[]) { + VMSTATE_STRUCT_VARRAY_POINTER_KNOWN(vq, struct VirtIODevice, + VIRTIO_QUEUE_MAX, 0, vmstate_packed_virtqueue, VirtQ= ueue), + VMSTATE_END_OF_LIST() + } +}; + static const VMStateDescription vmstate_ringsize =3D { .name =3D "ringsize_state", .version_id =3D 1, @@ -2516,6 +2550,7 @@ static const VMStateDescription vmstate_virtio =3D { &vmstate_virtio_device_endian, &vmstate_virtio_64bit_features, &vmstate_virtio_virtqueues, + &vmstate_virtio_packed_virtqueues, &vmstate_virtio_ringsize, &vmstate_virtio_broken, &vmstate_virtio_extra_state, @@ -2791,6 +2826,10 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f, int= version_id) virtio_queue_update_rings(vdev, i); } =20 + if (virtio_vdev_has_feature(vdev, VIRTIO_F_RING_PACKED)) { + continue; + } + nheads =3D vring_avail_idx(&vdev->vq[i]) - vdev->vq[i].last_av= ail_idx; /* Check it isn't doing strange things with descriptor numbers= . */ if (nheads > vdev->vq[i].vring.num) { --=20 1.8.3.1