From patchwork Wed Dec 19 09:53:27 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: fred.konrad@greensocs.com X-Patchwork-Id: 207283 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id C4A4D2C00E1 for ; Wed, 19 Dec 2012 20:54:11 +1100 (EST) Received: from localhost ([::1]:53894 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TlGLp-0004pj-Ui for incoming@patchwork.ozlabs.org; Wed, 19 Dec 2012 04:54:09 -0500 Received: from eggs.gnu.org ([208.118.235.92]:36418) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TlGLY-0004nV-Rx for qemu-devel@nongnu.org; Wed, 19 Dec 2012 04:53:55 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TlGLV-0001iv-2p for qemu-devel@nongnu.org; Wed, 19 Dec 2012 04:53:52 -0500 Received: from greensocs.com ([87.106.252.221]:54763 helo=s15328186.onlinehome-server.info) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TlGLU-0001il-Sl for qemu-devel@nongnu.org; Wed, 19 Dec 2012 04:53:49 -0500 Received: from localhost (unknown [127.0.0.1]) by s15328186.onlinehome-server.info (Postfix) with ESMTP id 1DC5E439E30; Wed, 19 Dec 2012 09:53:48 +0000 (UTC) Received: from s15328186.onlinehome-server.info ([127.0.0.1]) by localhost (s15328186.onlinehome-server.info [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id OSIrau5-Z3O4; Wed, 19 Dec 2012 10:53:47 +0100 (CET) Received: by s15328186.onlinehome-server.info (Postfix, from userid 491) id C878B439E35; Wed, 19 Dec 2012 10:53:47 +0100 (CET) Received: from compaq.katmai.xl.cx.katmai.xl.cx (lan31-11-83-155-143-136.fbx.proxad.net [83.155.143.136]) by s15328186.onlinehome-server.info (Postfix) with ESMTPSA id 97F70439E30; Wed, 19 Dec 2012 10:53:46 +0100 (CET) From: fred.konrad@greensocs.com To: qemu-devel@nongnu.org Date: Wed, 19 Dec 2012 10:53:27 +0100 Message-Id: <1355910821-21302-2-git-send-email-fred.konrad@greensocs.com> X-Mailer: git-send-email 1.7.11.7 In-Reply-To: <1355910821-21302-1-git-send-email-fred.konrad@greensocs.com> References: <1355910821-21302-1-git-send-email-fred.konrad@greensocs.com> X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6.x X-Received-From: 87.106.252.221 Cc: peter.maydell@linaro.org, aliguori@us.ibm.com, e.voevodin@samsung.com, mark.burton@greensocs.com, agraf@suse.de, stefanha@redhat.com, cornelia.huck@de.ibm.com, afaerber@suse.de, fred.konrad@greensocs.com Subject: [Qemu-devel] [RFC PATCH V8 01/15] qdev : add a maximum device allowed field for the bus. X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: KONRAD Frederic Add a max_dev field to BusState to specify the maximum amount of devices allowed on the bus ( have no effect if max_dev=0 ) Signed-off-by: KONRAD Frederic --- hw/qdev-core.h | 2 ++ hw/qdev-monitor.c | 11 +++++++++++ 2 files changed, 13 insertions(+) diff --git a/hw/qdev-core.h b/hw/qdev-core.h index d672cca..af909b9 100644 --- a/hw/qdev-core.h +++ b/hw/qdev-core.h @@ -104,6 +104,8 @@ struct BusState { const char *name; int allow_hotplug; int max_index; + /* maximum devices allowed on the bus, 0 : no limit. */ + int max_dev; QTAILQ_HEAD(ChildrenHead, BusChild) children; QLIST_ENTRY(BusState) sibling; }; diff --git a/hw/qdev-monitor.c b/hw/qdev-monitor.c index a1b4d6a..7a9d275 100644 --- a/hw/qdev-monitor.c +++ b/hw/qdev-monitor.c @@ -292,6 +292,17 @@ static BusState *qbus_find_recursive(BusState *bus, const char *name, if (bus_typename && !object_dynamic_cast(OBJECT(bus), bus_typename)) { match = 0; } + if ((bus->max_dev != 0) && (bus->max_dev <= bus->max_index)) { + if (name != NULL) { + /* bus was explicitly specified : return an error. */ + qerror_report(ERROR_CLASS_GENERIC_ERROR, "Bus '%s' is full", + bus->name); + return NULL; + } else { + /* bus was not specified : try to find another one. */ + match = 0; + } + } if (match) { return bus; }