From nobody Tue Feb 10 19:17:28 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) 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=pass (zoho.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (209.51.188.17 [209.51.188.17]) by mx.zohomail.com with SMTPS id 1553165983763986.8185086030744; Thu, 21 Mar 2019 03:59:43 -0700 (PDT) Received: from localhost ([127.0.0.1]:34835 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h6vQ4-0002fx-N9 for importer@patchew.org; Thu, 21 Mar 2019 06:59:32 -0400 Received: from eggs.gnu.org ([209.51.188.92]:46974) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1h6vHb-0004Og-R3 for qemu-devel@nongnu.org; Thu, 21 Mar 2019 06:50:48 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1h6vG3-0002ov-R4 for qemu-devel@nongnu.org; Thu, 21 Mar 2019 06:49:12 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:2252 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1h6vG2-0002Tl-2J; Thu, 21 Mar 2019 06:49:10 -0400 Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id BC46D422EBD4C3B27C3A; Thu, 21 Mar 2019 18:49:07 +0800 (CST) Received: from S00345302A-PC.china.huawei.com (10.202.227.237) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.408.0; Thu, 21 Mar 2019 18:48:59 +0800 From: Shameer Kolothum To: , , , , , , , Date: Thu, 21 Mar 2019 10:47:42 +0000 Message-ID: <20190321104745.28068-8-shameerali.kolothum.thodi@huawei.com> X-Mailer: git-send-email 2.12.0.windows.1 In-Reply-To: <20190321104745.28068-1-shameerali.kolothum.thodi@huawei.com> References: <20190321104745.28068-1-shameerali.kolothum.thodi@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.202.227.237] X-CFilter-Loop: Reflected X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 45.249.212.191 Subject: [Qemu-devel] [PATCH v3 07/10] hw/arm/virt: Introduce opt-in feature "fdt" 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: linuxarm@huawei.com, xuwei5@hisilicon.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This is to disable/enable populating DT nodes in case any conflict with acpi tables. The default is "off". This will be used in subsequent patch where cold plug device-memory support is added for DT boot. If DT memory node support is added for cold-plugged device memory, those memory will be visible to Guest kernel via UEFI GetMemoryMap() and gets treated as early boot memory. Hence memory becomes non hot-un-unpluggable even if Guest is booted in ACPI mode. Signed-off-by: Shameer Kolothum --- hw/arm/virt.c | 23 +++++++++++++++++++++++ include/hw/arm/virt.h | 1 + 2 files changed, 24 insertions(+) diff --git a/hw/arm/virt.c b/hw/arm/virt.c index 13db0e9..b602151 100644 --- a/hw/arm/virt.c +++ b/hw/arm/virt.c @@ -1717,6 +1717,20 @@ static void virt_set_highmem(Object *obj, bool value= , Error **errp) vms->highmem =3D value; } =20 +static bool virt_get_fdt(Object *obj, Error **errp) +{ + VirtMachineState *vms =3D VIRT_MACHINE(obj); + + return vms->use_fdt; +} + +static void virt_set_fdt(Object *obj, bool value, Error **errp) +{ + VirtMachineState *vms =3D VIRT_MACHINE(obj); + + vms->use_fdt =3D value; +} + static bool virt_get_its(Object *obj, Error **errp) { VirtMachineState *vms =3D VIRT_MACHINE(obj); @@ -2005,6 +2019,15 @@ static void virt_instance_init(Object *obj) object_property_set_description(obj, "gic-version", "Set GIC version. " "Valid values are 2, 3 and host", NULL= ); + /* fdt is disabled by default */ + vms->use_fdt =3D false; + object_property_add_bool(obj, "fdt", virt_get_fdt, + virt_set_fdt, NULL); + object_property_set_description(obj, "fdt", + "Set on/off to enable/disable device t= ree " + "nodes in case any conflict with ACPI" + "(eg: device memory node)", + NULL); =20 vms->highmem_ecam =3D !vmc->no_highmem_ecam; =20 diff --git a/include/hw/arm/virt.h b/include/hw/arm/virt.h index c5e4c96..14b2e0a 100644 --- a/include/hw/arm/virt.h +++ b/include/hw/arm/virt.h @@ -119,6 +119,7 @@ typedef struct { bool highmem_ecam; bool its; bool virt; + bool use_fdt; int32_t gic_version; VirtIOMMUType iommu; struct arm_boot_info bootinfo; --=20 2.7.4