From nobody Mon Feb 9 18:44:21 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=1618992450; cv=none; d=zohomail.com; s=zohoarc; b=ilwQqTPqLUOuCczUu9w3c+NImaBBwO3c5EASs4ljF1sH2X4TdmHwraOpKrFxhoLd+QwNH4x/C/eI3lN57kPJXXCNQOxIH4/DQpJjH7Sea1CnJZLkNUYsItYyQS7zjur3FumcN3yFOxSpeRzWsT2lIsONdsJ1rgu1aRr/HA7fD08= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1618992450; 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=/mlzMGtkdW1GqGXMfhDUlb0+RTtoXhrl6eTWG3a1r+I=; b=HdAo3uBEyd4qD+zS6O4v374Hd9xmQCZeCbyyIQljjK2SizGD8VBlczt47d1JtdrBRKfhbmeBlkiU+nr0kYQVdOU8sxBttUc46OM1yc6qlPjIKLzobMYkSY4l8mN8dxQl/JjFJqbmNod2wfZ7OQzvqaHVDZWsj1hJBRvTrfdTkqQ= 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 1618992450166172.72438268991573; Wed, 21 Apr 2021 01:07:30 -0700 (PDT) Received: from localhost ([::1]:41476 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lZ7tR-00031y-17 for importer@patchew.org; Wed, 21 Apr 2021 04:07:29 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:51928) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lZ7rc-0001Bu-4j; Wed, 21 Apr 2021 04:05:36 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:5039) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lZ7rZ-00023x-Tp; Wed, 21 Apr 2021 04:05:35 -0400 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4FQCjW5fmTzlYqR; Wed, 21 Apr 2021 16:03:27 +0800 (CST) Received: from huawei.com (10.174.185.226) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.498.0; Wed, 21 Apr 2021 16:05:15 +0800 From: Wang Xingang To: , , , , , , , , , , Subject: [PATCH RFC v3 4/8] hw/i386: Add a pc machine option to bypass iommu for primary bus Date: Wed, 21 Apr 2021 08:04:59 +0000 Message-ID: <1618992303-19556-5-git-send-email-wangxingang5@huawei.com> X-Mailer: git-send-email 2.6.4.windows.1 In-Reply-To: <1618992303-19556-1-git-send-email-wangxingang5@huawei.com> References: <1618992303-19556-1-git-send-email-wangxingang5@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.185.226] 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=45.249.212.32; envelope-from=wangxingang5@huawei.com; helo=szxga06-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_H3=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, cenjiahui@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 Signed-off-by: Jiahui Cen --- 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 8a84b25a03..2266a0520f 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1529,6 +1529,20 @@ 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) @@ -1628,6 +1642,7 @@ 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); @@ -1752,6 +1767,9 @@ 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 dcf060b791..83ee8f2a01 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