From nobody Sun Feb 8 18:31:20 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=1591880262; cv=none; d=zohomail.com; s=zohoarc; b=G7N5DlABq+wUxFXXYABPvp65TtsBqRJXQMiRU2u8yIU78Pjl6b/W56J8yNcTPiUDfiEI+w42XIF+okIndDYson5OpIVWnH/tA2a7Chy6m/espZUB+sXbP9zy4Xlh6azx95YpTbTpl6pIIVfHvQx6XPZT8u7Msnw34O2Pi3uSXpg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1591880262; h=Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:Message-ID:References:Sender:Subject:To; bh=I1o8nXBKAXgieE+dE7YAKukb2Xo5htTz2OTabAgHa00=; b=NpYNJ6dxdTEcZPBt1PWFLJE0oY3VMVNtJyykM2Sj3oOGvDL2VMZKgVuKF+dSGn8BY+ilIY3wJiEP2mXGBki01oM87NT5gGxmnoK8D72mzNmvQikSPuWVRwhWAhgCZong2OI9cts3rJjRUGjDMFqFKcF9G7XOUzRo/FYlDQD7HmU= 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 1591880262504190.09393973553188; Thu, 11 Jun 2020 05:57:42 -0700 (PDT) Received: from localhost ([::1]:47640 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jjMm5-0002AP-7L for importer@patchew.org; Thu, 11 Jun 2020 08:57:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46410) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jjMcx-0002aD-Pi for qemu-devel@nongnu.org; Thu, 11 Jun 2020 08:48:15 -0400 Received: from mga05.intel.com ([192.55.52.43]:42732) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jjMcw-00080r-9u for qemu-devel@nongnu.org; Thu, 11 Jun 2020 08:48:15 -0400 Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Jun 2020 05:48:00 -0700 Received: from jacob-builder.jf.intel.com ([10.7.199.155]) by orsmga005.jf.intel.com with ESMTP; 11 Jun 2020 05:47:59 -0700 IronPort-SDR: smOgs6wMwoEb+UCfgGpEL95QZDi/7fR9JoEhglJdKvqniJZ6LBubqnlRhaTOiKeok3zGnPbyAD UX14Jjbhcvxw== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False IronPort-SDR: x2xbRxx64wd7GrPbIBv6itimjchWbdIMqvlUUQAYdM2j36y8y4nWUz/lYQzwN6Y+ocFVQLiXQw j+wPmchXXjGw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,499,1583222400"; d="scan'208";a="447911226" From: Liu Yi L To: qemu-devel@nongnu.org, alex.williamson@redhat.com, peterx@redhat.com Subject: [RFC v6 04/25] hw/pci: introduce pci_device_get_iommu_attr() Date: Thu, 11 Jun 2020 05:54:03 -0700 Message-Id: <1591880064-30638-5-git-send-email-yi.l.liu@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1591880064-30638-1-git-send-email-yi.l.liu@intel.com> References: <1591880064-30638-1-git-send-email-yi.l.liu@intel.com> 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=192.55.52.43; envelope-from=yi.l.liu@intel.com; helo=mga05.intel.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/11 08:48:00 X-ACL-Warn: Detected OS = FreeBSD 9.x or newer [fuzzy] 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, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN 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, hao.wu@intel.com, david@gibson.dropbear.id.au Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 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 e44d2a2..95589b2 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -2641,7 +2641,8 @@ 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; @@ -2692,14 +2693,38 @@ 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 ffe192d..f262f26 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 2.7.4