From patchwork Tue Oct 7 14:40:02 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cornelia Huck X-Patchwork-Id: 5048111 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id CCA85C11AB for ; Tue, 7 Oct 2014 17:52:22 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 053EA20166 for ; Tue, 7 Oct 2014 17:52:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 197CA20142 for ; Tue, 7 Oct 2014 17:52:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754949AbaJGRwS (ORCPT ); Tue, 7 Oct 2014 13:52:18 -0400 Received: from e06smtp10.uk.ibm.com ([195.75.94.106]:59804 "EHLO e06smtp10.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754759AbaJGRwQ (ORCPT ); Tue, 7 Oct 2014 13:52:16 -0400 Received: from /spool/local by e06smtp10.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 7 Oct 2014 18:52:11 +0100 Received: from b06cxnps3075.portsmouth.uk.ibm.com (d06relay10.portsmouth.uk.ibm.com [9.149.109.195]) by d06dlp03.portsmouth.uk.ibm.com (Postfix) with ESMTP id CF3C21B0A87F for ; Tue, 7 Oct 2014 15:41:50 +0100 (BST) Received: from d06av08.portsmouth.uk.ibm.com (d06av08.portsmouth.uk.ibm.com [9.149.37.249]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id s97EePIC29753406 for ; Tue, 7 Oct 2014 14:40:32 GMT Received: from d06av08.portsmouth.uk.ibm.com (localhost [127.0.0.1]) by d06av08.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s97EeHov000990 for ; Tue, 7 Oct 2014 08:40:18 -0600 Received: from gondolin.boeblingen.de.ibm.com (dyn-9-152-224-210.boeblingen.de.ibm.com [9.152.224.210]) by d06av08.portsmouth.uk.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id s97EeC4B000717; Tue, 7 Oct 2014 08:40:16 -0600 From: Cornelia Huck To: virtualization@lists.linux-foundation.org, qemu-devel@nongnu.org, kvm@vger.kernel.org Cc: rusty@rustcorp.com.au, thuth@linux.vnet.ibm.com, Cornelia Huck Subject: [PATCH RFC 06/11] virtio: allow virtio-1 queue layout Date: Tue, 7 Oct 2014 16:40:02 +0200 Message-Id: <1412692807-12398-7-git-send-email-cornelia.huck@de.ibm.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1412692807-12398-1-git-send-email-cornelia.huck@de.ibm.com> References: <1412692807-12398-1-git-send-email-cornelia.huck@de.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 14100717-4966-0000-0000-000001938645 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP For virtio-1 devices, we allow a more complex queue layout that doesn't require descriptor table and rings on a physically-contigous memory area: add virtio_queue_set_rings() to allow transports to set this up. Signed-off-by: Cornelia Huck --- hw/virtio/virtio.c | 16 ++++++++++++++++ include/hw/virtio/virtio.h | 2 ++ 2 files changed, 18 insertions(+) diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index e6ae3a0..147d227 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -96,6 +96,13 @@ static void virtqueue_init(VirtQueue *vq) { hwaddr pa = vq->pa; + if (pa == -1ULL) { + /* + * This is a virtio-1 style vq that has already been setup + * in virtio_queue_set. + */ + return; + } vq->vring.desc = pa; vq->vring.avail = pa + vq->vring.num * sizeof(VRingDesc); vq->vring.used = vring_align(vq->vring.avail + @@ -719,6 +726,15 @@ hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n) return vdev->vq[n].pa; } +void virtio_queue_set_rings(VirtIODevice *vdev, int n, hwaddr desc, + hwaddr avail, hwaddr used) +{ + vdev->vq[n].pa = -1ULL; + vdev->vq[n].vring.desc = desc; + vdev->vq[n].vring.avail = avail; + vdev->vq[n].vring.used = used; +} + void virtio_queue_set_num(VirtIODevice *vdev, int n, int num) { /* Don't allow guest to flip queue between existent and diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index 40e567c..f840320 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -227,6 +227,8 @@ void virtio_queue_set_addr(VirtIODevice *vdev, int n, hwaddr addr); hwaddr virtio_queue_get_addr(VirtIODevice *vdev, int n); void virtio_queue_set_num(VirtIODevice *vdev, int n, int num); int virtio_queue_get_num(VirtIODevice *vdev, int n); +void virtio_queue_set_rings(VirtIODevice *vdev, int n, hwaddr desc, + hwaddr avail, hwaddr used); void virtio_queue_set_align(VirtIODevice *vdev, int n, int align); void virtio_queue_notify(VirtIODevice *vdev, int n); uint16_t virtio_queue_vector(VirtIODevice *vdev, int n);