From nobody Tue Feb 10 01:30:37 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=intel.com ARC-Seal: i=1; a=rsa-sha256; t=1614688981; cv=none; d=zohomail.com; s=zohoarc; b=mvF4qjoRWjDD0TlAowKpSHpevKSA1hMdbP6QnYhn6IKPOpk/O94w4TD7UrkJ3Jma5nYZylYtX0dOJCZ5FnAxRM5/vuJqyojGPgM4FtpdJB+9qctA1zMDaNafmgXoCPf0p/7Jihdj4aOig+WkgPi1IwuoRJLW+tdTYslC85+6CfM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1614688981; h=Content-Transfer-Encoding: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=rm0LQ2HRLnv6wtupKtQ3j6+xRGNlXMPrL8SM+kztEP4=; b=j63p++/36geQ+60r4+NOYYRWTRXc3qBLJImgOYFUOR1edLMYbJxOfzIeh0DsqfDC6cJb1B4lix2OqepOzG38nyxmwknOlupIwZymsjGGO/XkMlbP0+8wzBhMshSTv0uImUrZK9Ue1VvQFT4JqVc65uqEBNb/VPQ/UywjSE0HpLI= 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 161468898177487.06076640290235; Tue, 2 Mar 2021 04:43:01 -0800 (PST) Received: from localhost ([::1]:40922 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lH4Me-0001Em-Mw for importer@patchew.org; Tue, 02 Mar 2021 07:43:00 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:60908) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lH4Jd-0007H6-1w for qemu-devel@nongnu.org; Tue, 02 Mar 2021 07:39:53 -0500 Received: from mga09.intel.com ([134.134.136.24]:30217) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lH4Ja-0002cX-FQ for qemu-devel@nongnu.org; Tue, 02 Mar 2021 07:39:52 -0500 Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Mar 2021 04:39:49 -0800 Received: from yiliu-dev.bj.intel.com (HELO dual-ub.bj.intel.com) ([10.238.156.135]) by fmsmga004.fm.intel.com with ESMTP; 02 Mar 2021 04:39:45 -0800 IronPort-SDR: +M2b2G4R81+aIfyacrHvPFtCOgPk0lUMO6B03zuQ8hMp4U5VsVkCpz86AhLNleDJOmtIuLr2NH eCEgLHCcnPSA== X-IronPort-AV: E=McAfee;i="6000,8403,9910"; a="186914677" X-IronPort-AV: E=Sophos;i="5.81,216,1610438400"; d="scan'208";a="186914677" IronPort-SDR: kM17WPcU1rDLUcKBqP29NCQv69tGvu1ojdMAzsCbJIX9/DWxCpfNETG1swiSkDjtXA4gXh9IMa uy8qvj6rEm9w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,216,1610438400"; d="scan'208";a="427472720" From: Liu Yi L To: qemu-devel@nongnu.org, alex.williamson@redhat.com, peterx@redhat.com, jasowang@redhat.com Subject: [RFC v11 05/25] hw/pci: introduce pci_device_get_iommu_attr() Date: Wed, 3 Mar 2021 04:38:07 +0800 Message-Id: <20210302203827.437645-6-yi.l.liu@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210302203827.437645-1-yi.l.liu@intel.com> References: <20210302203827.437645-1-yi.l.liu@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=134.134.136.24; envelope-from=yi.l.liu@intel.com; helo=mga09.intel.com X-Spam_score_int: -22 X-Spam_score: -2.3 X-Spam_bar: -- X-Spam_report: (-2.3 / 5.0 requ) BAYES_00=-1.9, DATE_IN_FUTURE_06_12=1.947, 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: jean-philippe@linaro.org, kevin.tian@intel.com, yi.l.liu@intel.com, Yi Sun , kvm@vger.kernel.org, mst@redhat.com, jun.j.tian@intel.com, eric.auger@redhat.com, yi.y.sun@intel.com, Jacob Pan , pbonzini@redhat.com, Lingshan.Zhu@intel.com, hao.wu@intel.com, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Type: text/plain; charset="utf-8" This patch adds pci_device_get_iommu_attr() to get vIOMMU attributes. e.g. if nesting IOMMU wanted. Cc: Kevin Tian Cc: Jacob Pan Cc: Peter Xu Cc: Eric Auger Cc: Yi Sun Cc: David Gibson Cc: Michael S. Tsirkin Signed-off-by: Liu Yi L --- hw/pci/pci.c | 35 ++++++++++++++++++++++++++++++----- include/hw/pci/pci.h | 7 +++++++ 2 files changed, 37 insertions(+), 5 deletions(-) diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 61f115d742..19365e2799 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -2665,7 +2665,8 @@ static void pci_device_class_base_init(ObjectClass *k= lass, void *data) } } =20 -AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) +static void pci_device_get_iommu_bus_devfn(PCIDevice *dev, + PCIBus **pbus, uint8_t *pdevfn) { PCIBus *bus =3D pci_get_bus(dev); PCIBus *iommu_bus =3D bus; @@ -2716,14 +2717,38 @@ AddressSpace *pci_device_iommu_address_space(PCIDev= ice *dev) =20 iommu_bus =3D parent_bus; } - if (iommu_bus && iommu_bus->iommu_ops && - iommu_bus->iommu_ops->get_address_space) { - return iommu_bus->iommu_ops->get_address_space(bus, - iommu_bus->iommu_opaque, devfn); + *pbus =3D iommu_bus; + *pdevfn =3D devfn; +} + +AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) +{ + PCIBus *bus; + uint8_t devfn; + + pci_device_get_iommu_bus_devfn(dev, &bus, &devfn); + if (bus && bus->iommu_ops && + bus->iommu_ops->get_address_space) { + return bus->iommu_ops->get_address_space(bus, + bus->iommu_opaque, devfn); } return &address_space_memory; } =20 +int pci_device_get_iommu_attr(PCIDevice *dev, IOMMUAttr attr, void *data) +{ + PCIBus *bus; + uint8_t devfn; + + pci_device_get_iommu_bus_devfn(dev, &bus, &devfn); + if (bus && bus->iommu_ops && + bus->iommu_ops->get_iommu_attr) { + return bus->iommu_ops->get_iommu_attr(bus, bus->iommu_opaque, + devfn, attr, data); + } + return -ENOENT; +} + void pci_setup_iommu(PCIBus *bus, const PCIIOMMUOps *ops, void *opaque) { bus->iommu_ops =3D ops; diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index d6b962f646..b99e05c81e 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -485,13 +485,20 @@ void pci_bus_get_w64_range(PCIBus *bus, Range *range); =20 void pci_device_deassert_intx(PCIDevice *dev); =20 +typedef enum IOMMUAttr { + IOMMU_WANT_NESTING, +} IOMMUAttr; + typedef struct PCIIOMMUOps PCIIOMMUOps; struct PCIIOMMUOps { AddressSpace * (*get_address_space)(PCIBus *bus, void *opaque, int32_t devfn); + int (*get_iommu_attr)(PCIBus *bus, void *opaque, int32_t devfn, + IOMMUAttr attr, void *data); }; =20 AddressSpace *pci_device_iommu_address_space(PCIDevice *dev); +int pci_device_get_iommu_attr(PCIDevice *dev, IOMMUAttr attr, void *data); void pci_setup_iommu(PCIBus *bus, const PCIIOMMUOps *iommu_ops, void *opaq= ue); =20 static inline void --=20 2.25.1