From nobody Mon Feb 9 11:51:23 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=huawei.com ARC-Seal: i=1; a=rsa-sha256; t=1621914935; cv=none; d=zohomail.com; s=zohoarc; b=WQzzqVZqur6WXeZfWjuNvSPNW1c2IuCmpnjs76w38JYDHdWXB8f2aEmmNydp1lecfF0T9IRXrokx9mZTwpmzym1IVpfoq9fxvNm/9A1HwvoPpMaiqheo3cOadwPxQwQL+CmjLtbEOisBbQTD5CCXusyFgnEKOKwZw0ZUKFh0NLM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1621914935; h=Content-Type:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=zQR7K/NC1gheAO/fMZ2ct1/gGP49dbdki15kBTMeN6o=; b=AGEeSOK+N4Khp6AU8PRSqy/4zv+mKC2qZ5mlRGxAPw4OBt3E3H/lcXMMuLWxOG6GANowLUC7s+07F489A9/rnF/EmKPllawCxLEU8MeqphdfOJBY4OScHqmGAjDZc+MpXA9gbXZEhr7Y3ZS2dcUaxfs4yac08PjBkPgRmIOnywc= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail header.from= (p=none dis=none) header.from= Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1621914935779326.1914954542584; Mon, 24 May 2021 20:55:35 -0700 (PDT) Received: from localhost ([::1]:58836 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1llOAH-0002xZ-Rn for importer@patchew.org; Mon, 24 May 2021 23:55:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:57670) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1llO5N-0006Ry-CF; Mon, 24 May 2021 23:50:29 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:3635) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1llO5H-0001kk-QM; Mon, 24 May 2021 23:50:29 -0400 Received: from dggems703-chm.china.huawei.com (unknown [172.30.72.58]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4Fq0QL73dLzBwKr; Tue, 25 May 2021 11:47:22 +0800 (CST) Received: from dggpemm500009.china.huawei.com (7.185.36.225) by dggems703-chm.china.huawei.com (10.3.19.180) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Tue, 25 May 2021 11:50:14 +0800 Received: from huawei.com (10.174.185.226) by dggpemm500009.china.huawei.com (7.185.36.225) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Tue, 25 May 2021 11:50:13 +0800 From: Wang Xingang To: , , , , , , , , , , Subject: [PATCH v4 4/8] hw/i386: Add a pc machine option to bypass iommu for primary bus Date: Tue, 25 May 2021 03:50:01 +0000 Message-ID: <1621914605-14724-5-git-send-email-wangxingang5@huawei.com> X-Mailer: git-send-email 2.6.4.windows.1 In-Reply-To: <1621914605-14724-1-git-send-email-wangxingang5@huawei.com> References: <1621914605-14724-1-git-send-email-wangxingang5@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.185.226] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggpemm500009.china.huawei.com (7.185.36.225) X-CFilter-Loop: Reflected Received-SPF: pass (zohomail.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; Received-SPF: pass client-ip=45.249.212.35; envelope-from=wangxingang5@huawei.com; helo=szxga07-in.huawei.com X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: xieyingtai@huawei.com, wangxingang5@huawei.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" From: Xingang Wang Add a bypass_iommu pc machine option to bypass iommu translation for the primary root bus. The option can be used as manner: qemu-system-x86_64 -machine q35,bypass_iommu=3Dtrue Signed-off-by: Xingang Wang --- hw/i386/pc.c | 18 ++++++++++++++++++ hw/pci-host/q35.c | 1 + include/hw/i386/pc.h | 1 + 3 files changed, 20 insertions(+) diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 8cfaf216e7..865a6e4c7a 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1530,6 +1530,20 @@ static void pc_machine_set_hpet(Object *obj, bool va= lue, Error **errp) pcms->hpet_enabled =3D value; } =20 +static bool pc_machine_get_bypass_iommu(Object *obj, Error **errp) +{ + PCMachineState *pcms =3D PC_MACHINE(obj); + + return pcms->bypass_iommu; +} + +static void pc_machine_set_bypass_iommu(Object *obj, bool value, Error **e= rrp) +{ + PCMachineState *pcms =3D PC_MACHINE(obj); + + pcms->bypass_iommu =3D value; +} + static void pc_machine_get_max_ram_below_4g(Object *obj, Visitor *v, const char *name, void *opaque, Error **errp) @@ -1629,6 +1643,7 @@ static void pc_machine_initfn(Object *obj) #ifdef CONFIG_HPET pcms->hpet_enabled =3D true; #endif + pcms->bypass_iommu =3D false; =20 pc_system_flash_create(pcms); pcms->pcspk =3D isa_new(TYPE_PC_SPEAKER); @@ -1753,6 +1768,9 @@ static void pc_machine_class_init(ObjectClass *oc, vo= id *data) object_class_property_add_bool(oc, "hpet", pc_machine_get_hpet, pc_machine_set_hpet); =20 + object_class_property_add_bool(oc, "bypass_iommu", + pc_machine_get_bypass_iommu, pc_machine_set_bypass_iommu); + object_class_property_add(oc, PC_MACHINE_MAX_FW_SIZE, "size", pc_machine_get_max_fw_size, pc_machine_set_max_fw_size, NULL, NULL); diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c index 2eb729dff5..ade05a5539 100644 --- a/hw/pci-host/q35.c +++ b/hw/pci-host/q35.c @@ -64,6 +64,7 @@ static void q35_host_realize(DeviceState *dev, Error **er= rp) s->mch.address_space_io, 0, TYPE_PCIE_BUS); PC_MACHINE(qdev_get_machine())->bus =3D pci->bus; + pci->bypass_iommu =3D PC_MACHINE(qdev_get_machine())->bypass_iommu; qdev_realize(DEVICE(&s->mch), BUS(pci->bus), &error_fatal); } =20 diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 1522a3359a..10a464744a 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -45,6 +45,7 @@ typedef struct PCMachineState { bool sata_enabled; bool pit_enabled; bool hpet_enabled; + bool bypass_iommu; uint64_t max_fw_size; =20 /* NUMA information: */ --=20 2.19.1