From patchwork Wed Oct 20 08:54:59 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Kumar X-Patchwork-Id: 268161 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 o9K8uBnq010264 for ; Wed, 20 Oct 2010 08:56:12 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751406Ab0JTIzN (ORCPT ); Wed, 20 Oct 2010 04:55:13 -0400 Received: from e28smtp05.in.ibm.com ([122.248.162.5]:54028 "EHLO e28smtp05.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751334Ab0JTIzJ (ORCPT ); Wed, 20 Oct 2010 04:55:09 -0400 Received: from d28relay05.in.ibm.com (d28relay05.in.ibm.com [9.184.220.62]) by e28smtp05.in.ibm.com (8.14.4/8.13.1) with ESMTP id o9K8t3Cv009208; Wed, 20 Oct 2010 14:25:03 +0530 Received: from d28av01.in.ibm.com (d28av01.in.ibm.com [9.184.220.63]) by d28relay05.in.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o9K8t2cj2396400; Wed, 20 Oct 2010 14:25:02 +0530 Received: from d28av01.in.ibm.com (loopback [127.0.0.1]) by d28av01.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id o9K8t09T026011; Wed, 20 Oct 2010 14:25:02 +0530 Received: from krkumar2.in.ibm.com ([9.124.209.222]) by d28av01.in.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id o9K8sx11025966; Wed, 20 Oct 2010 14:24:59 +0530 From: Krishna Kumar To: rusty@rustcorp.com.au, davem@davemloft.net, mst@redhat.com Cc: eric.dumazet@gmail.com, kvm@vger.kernel.org, netdev@vger.kernel.org, arnd@arndb.de, avi@redhat.com, anthony@codemonkey.ws, Krishna Kumar Date: Wed, 20 Oct 2010 14:24:59 +0530 Message-Id: <20101020085459.15579.37705.sendpatchset@krkumar2.in.ibm.com> In-Reply-To: <20101020085452.15579.76002.sendpatchset@krkumar2.in.ibm.com> References: <20101020085452.15579.76002.sendpatchset@krkumar2.in.ibm.com> Subject: [v3 RFC PATCH 1/4] Change virtqueue structure Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter1.kernel.org [140.211.167.41]); Wed, 20 Oct 2010 08:56:12 +0000 (UTC) diff -ruNp org/include/linux/virtio.h new.dynamic.optimize_vhost/include/linux/virtio.h --- org/include/linux/virtio.h 2010-10-11 10:20:22.000000000 +0530 +++ new.dynamic.optimize_vhost/include/linux/virtio.h 2010-10-15 13:25:42.000000000 +0530 @@ -22,6 +22,7 @@ struct virtqueue { void (*callback)(struct virtqueue *vq); const char *name; struct virtio_device *vdev; + int queue_index; /* the index of the queue */ void *priv; }; diff -ruNp org/drivers/virtio/virtio_pci.c new.dynamic.optimize_vhost/drivers/virtio/virtio_pci.c --- org/drivers/virtio/virtio_pci.c 2010-10-11 10:20:15.000000000 +0530 +++ new.dynamic.optimize_vhost/drivers/virtio/virtio_pci.c 2010-10-15 13:25:42.000000000 +0530 @@ -75,9 +75,6 @@ struct virtio_pci_vq_info /* the number of entries in the queue */ int num; - /* the index of the queue */ - int queue_index; - /* the virtual address of the ring queue */ void *queue; @@ -185,11 +182,10 @@ static void vp_reset(struct virtio_devic static void vp_notify(struct virtqueue *vq) { struct virtio_pci_device *vp_dev = to_vp_device(vq->vdev); - struct virtio_pci_vq_info *info = vq->priv; /* we write the queue's selector into the notification register to * signal the other end */ - iowrite16(info->queue_index, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_NOTIFY); + iowrite16(vq->queue_index, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_NOTIFY); } /* Handle a configuration change: Tell driver if it wants to know. */ @@ -385,7 +381,6 @@ static struct virtqueue *setup_vq(struct if (!info) return ERR_PTR(-ENOMEM); - info->queue_index = index; info->num = num; info->msix_vector = msix_vec; @@ -408,6 +403,7 @@ static struct virtqueue *setup_vq(struct goto out_activate_queue; } + vq->queue_index = index; vq->priv = info; info->vq = vq; @@ -446,7 +442,7 @@ static void vp_del_vq(struct virtqueue * list_del(&info->node); spin_unlock_irqrestore(&vp_dev->lock, flags); - iowrite16(info->queue_index, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_SEL); + iowrite16(vq->queue_index, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_SEL); if (vp_dev->msix_enabled) { iowrite16(VIRTIO_MSI_NO_VECTOR,