From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59993) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yj1Cb-0007Eg-Vu for qemu-devel@nongnu.org; Fri, 17 Apr 2015 04:00:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Yj1CX-0001YY-I0 for qemu-devel@nongnu.org; Fri, 17 Apr 2015 04:00:41 -0400 Received: from mx1.redhat.com ([209.132.183.28]:50328) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Yj1CX-0001YM-Ch for qemu-devel@nongnu.org; Fri, 17 Apr 2015 04:00:37 -0400 From: Fam Zheng Date: Fri, 17 Apr 2015 15:59:26 +0800 Message-Id: <1429257573-7359-12-git-send-email-famz@redhat.com> In-Reply-To: <1429257573-7359-1-git-send-email-famz@redhat.com> References: <1429257573-7359-1-git-send-email-famz@redhat.com> Subject: [Qemu-devel] [PATCH 11/18] virtio: Add "needs_reset" flag to virtio device List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Kevin Wolf , "Michael S. Tsirkin" , "Aneesh Kumar K.V" , Stefan Hajnoczi , Amit Shah , Paolo Bonzini Signed-off-by: Fam Zheng --- hw/virtio/virtio.c | 18 ++++++++++++++++++ include/hw/virtio/virtio.h | 2 ++ 2 files changed, 20 insertions(+) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index 6dfa181..7ff0dc4 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -623,6 +623,10 @@ void virtio_set_status(VirtIODevice *vdev, uint8_t val) VirtioDeviceClass *k = VIRTIO_DEVICE_GET_CLASS(vdev); trace_virtio_set_status(vdev, val); + if (val) { + /* Unsetting NEED_RESET bit without reset is ignored. */ + val |= (vdev->status & VIRTIO_CONFIG_S_NEEDS_RESET); + } if (k->set_status) { k->set_status(vdev, val); } @@ -1384,6 +1388,20 @@ static void virtio_device_realize(DeviceState *dev, Error **errp) virtio_bus_device_plugged(vdev); } +void virtio_device_set_needs_reset(VirtIODevice *vdev) +{ + if (vdev->status & VIRTIO_CONFIG_S_NEEDS_RESET) { + return; + } + vdev->status |= VIRTIO_CONFIG_S_NEEDS_RESET; + virtio_notify_config(vdev); +} + +bool virtio_device_needs_reset(VirtIODevice *vdev) +{ + return vdev->status & VIRTIO_CONFIG_S_NEEDS_RESET; +} + static void virtio_device_unrealize(DeviceState *dev, Error **errp) { VirtIODevice *vdev = VIRTIO_DEVICE(dev); diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index 52e2b1c..71d98a3 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -131,6 +131,8 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int queue_size, void (*handle_output)(VirtIODevice *, VirtQueue *), Error **errp); +void virtio_device_set_needs_reset(VirtIODevice *vdev); +bool virtio_device_needs_reset(VirtIODevice *vdev); void virtio_del_queue(VirtIODevice *vdev, int n, Error **errp); -- 1.9.3