From nobody Fri Nov 7 10:16:24 2025 Delivered-To: importer@patchew.org Received-SPF: temperror (zoho.com: Error in retrieving data from DNS) 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=temperror (zoho.com: Error in retrieving data from DNS) 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 (209.51.188.17 [209.51.188.17]) by mx.zohomail.com with SMTPS id 1547517027310743.1323870255986; Mon, 14 Jan 2019 17:50:27 -0800 (PST) Received: from localhost ([127.0.0.1]:49474 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gjDrx-0005kO-45 for importer@patchew.org; Mon, 14 Jan 2019 20:50:21 -0500 Received: from eggs.gnu.org ([209.51.188.92]:36654) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gjDjc-0007cx-O5 for qemu-devel@nongnu.org; Mon, 14 Jan 2019 20:41:45 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gjDet-0008Ra-Me for qemu-devel@nongnu.org; Mon, 14 Jan 2019 20:36:52 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48842) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gjDet-0008RF-H5 for qemu-devel@nongnu.org; Mon, 14 Jan 2019 20:36:51 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B7DED8046F; Tue, 15 Jan 2019 01:36:50 +0000 (UTC) Received: from redhat.com (ovpn-124-229.rdu2.redhat.com [10.10.124.229]) by smtp.corp.redhat.com (Postfix) with ESMTP id A9A9A5D76A; Tue, 15 Jan 2019 01:36:47 +0000 (UTC) Date: Mon, 14 Jan 2019 20:36:47 -0500 From: "Michael S. Tsirkin" To: qemu-devel@nongnu.org Message-ID: <20190115003812.11329-35-mst@redhat.com> References: <20190115003812.11329-1-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20190115003812.11329-1-mst@redhat.com> X-Mutt-Fcc: =sent X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Tue, 15 Jan 2019 01:36:50 +0000 (UTC) Content-Transfer-Encoding: quoted-printable 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] [PULL 34/44] globals: Allow global properties to be optional 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: Peter Maydell , Cornelia Huck , Eduardo Habkost , Andreas =?utf-8?Q?F=C3=A4rber?= , =?utf-8?Q?Marc-Andr=C3=A9?= Lureau Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" From: Eduardo Habkost Making some global properties optional will let us simplify compat code when a given property works on most (but not all) subclasses of a given type. Device types will be able to opt out from optional compat properties by simply not registering those properties. Signed-off-by: Eduardo Habkost Reviewed-by: Cornelia Huck Reviewed-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- include/hw/qdev-core.h | 3 +++ qom/object.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h index 9614f76ae6..0a84c42756 100644 --- a/include/hw/qdev-core.h +++ b/include/hw/qdev-core.h @@ -250,6 +250,8 @@ struct PropertyInfo { /** * GlobalProperty: * @used: Set to true if property was used when initializing a device. + * @optional: If set to true, GlobalProperty will be skipped without errors + * if the property doesn't exist. * * An error is fatal for non-hotplugged devices, when the global is applie= d. */ @@ -258,6 +260,7 @@ typedef struct GlobalProperty { const char *property; const char *value; bool used; + bool optional; } GlobalProperty; =20 static inline void diff --git a/qom/object.c b/qom/object.c index 4e5226ca12..b8c732063b 100644 --- a/qom/object.c +++ b/qom/object.c @@ -385,6 +385,9 @@ void object_apply_global_props(Object *obj, const GPtrA= rray *props, Error **errp if (object_dynamic_cast(obj, p->driver) =3D=3D NULL) { continue; } + if (p->optional && !object_property_find(obj, p->property, NULL)) { + continue; + } p->used =3D true; object_property_parse(obj, p->value, p->property, &err); if (err !=3D NULL) { --=20 MST