From patchwork Mon Jan 15 10:13:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Duan, Zhenzhong" X-Patchwork-Id: 13519465 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 37DF1C3DA79 for ; Mon, 15 Jan 2024 10:17:23 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rPK1G-0007gB-3A; Mon, 15 Jan 2024 05:16:38 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rPK1E-0007g2-NM for qemu-devel@nongnu.org; Mon, 15 Jan 2024 05:16:36 -0500 Received: from mgamail.intel.com ([134.134.136.20]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rPK1C-0007Q7-Vy for qemu-devel@nongnu.org; Mon, 15 Jan 2024 05:16:36 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1705313795; x=1736849795; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=B3Md0rF8/bFv3IbdNxrK5ZVslBNY6iDAMFNVl8/7oBw=; b=jXTp8KFYg3+e+wRS9Sc3B8iSwjgle3I++g4snqJZk/OK8bSEr20OaJ4C te9e7pPL5qPMtq3dluNOtGSTNBzRX0UeaCQknGBK9V3OmCXTiuNEraimR dCVWm9PTolcvgeNnWbCYSUPuiy7VqkxOoVv231HZ9qqk1bLWknFIy2CiD KQqSgx3zrq8UTlBnztYRB78qiZXv1GpKV04rsmh0vTq+xVvXWGmIBBjUp 27lrweWHWqaFaDJhgPMbp9sZkCocoDgJj7+9yLfQ9iOzCJwj6BLNQ2pvY vyXhH7heYGLdVgiPBp97bVcDhmBIa/GHmoIcl7bHvPknHkZx6oyqJ1C0G w==; X-IronPort-AV: E=McAfee;i="6600,9927,10953"; a="390032460" X-IronPort-AV: E=Sophos;i="6.04,196,1695711600"; d="scan'208";a="390032460" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Jan 2024 02:16:33 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10953"; a="1030599491" X-IronPort-AV: E=Sophos;i="6.04,196,1695711600"; d="scan'208";a="1030599491" Received: from spr-s2600bt.bj.intel.com ([10.240.192.124]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Jan 2024 02:16:28 -0800 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, eric.auger@redhat.com, peterx@redhat.com, jasowang@redhat.com, mst@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, joao.m.martins@oracle.com, kevin.tian@intel.com, yi.l.liu@intel.com, yi.y.sun@intel.com, chao.p.peng@intel.com, Yi Sun , Zhenzhong Duan , Marcel Apfelbaum Subject: [PATCH rfcv1 2/6] hw/pci: introduce pci_device_set/unset_iommu_device() Date: Mon, 15 Jan 2024 18:13:09 +0800 Message-Id: <20240115101313.131139-3-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240115101313.131139-1-zhenzhong.duan@intel.com> References: <20240115101313.131139-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=134.134.136.20; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -71 X-Spam_score: -7.2 X-Spam_bar: ------- X-Spam_report: (-7.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-2.758, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, 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, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Yi Liu This adds pci_device_set/unset_iommu_device() to set/unset IOMMUFDDevice for a given PCIe device. Caller of set should fail if set operation fails. Extract out pci_device_get_iommu_bus_devfn() to facilitate implementation of pci_device_set/unset_iommu_device(). Signed-off-by: Yi Liu Signed-off-by: Yi Sun Signed-off-by: Nicolin Chen Signed-off-by: Zhenzhong Duan --- include/hw/pci/pci.h | 39 ++++++++++++++++++++++++++++++++++- hw/pci/pci.c | 49 +++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 86 insertions(+), 2 deletions(-) diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index fa6313aabc..a810c0ec74 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -7,6 +7,8 @@ /* PCI includes legacy ISA access. */ #include "hw/isa/isa.h" +#include "sysemu/iommufd_device.h" + extern bool pci_available; /* PCI bus */ @@ -384,10 +386,45 @@ typedef struct PCIIOMMUOps { * * @devfn: device and function number */ - AddressSpace * (*get_address_space)(PCIBus *bus, void *opaque, int devfn); + AddressSpace * (*get_address_space)(PCIBus *bus, void *opaque, int devfn); + /** + * @set_iommu_device: set iommufd device for a PCI device to vIOMMU + * + * Optional callback, if not implemented in vIOMMU, then vIOMMU can't + * utilize iommufd specific features. + * + * Return true if iommufd device is accepted, or else return false with + * errp set. + * + * @bus: the #PCIBus of the PCI device. + * + * @opaque: the data passed to pci_setup_iommu(). + * + * @devfn: device and function number of the PCI device. + * + * @idev: the data structure representing iommufd device. + * + */ + int (*set_iommu_device)(PCIBus *bus, void *opaque, int32_t devfn, + IOMMUFDDevice *idev, Error **errp); + /** + * @unset_iommu_device: unset iommufd device for a PCI device from vIOMMU + * + * Optional callback. + * + * @bus: the #PCIBus of the PCI device. + * + * @opaque: the data passed to pci_setup_iommu(). + * + * @devfn: device and function number of the PCI device. + */ + void (*unset_iommu_device)(PCIBus *bus, void *opaque, int32_t devfn); } PCIIOMMUOps; AddressSpace *pci_device_iommu_address_space(PCIDevice *dev); +int pci_device_set_iommu_device(PCIDevice *dev, IOMMUFDDevice *idev, + Error **errp); +void pci_device_unset_iommu_device(PCIDevice *dev); /** * pci_setup_iommu: Initialize specific IOMMU handlers for a PCIBus diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 76080af580..3848662f95 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -2672,7 +2672,10 @@ static void pci_device_class_base_init(ObjectClass *klass, void *data) } } -AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) +static void pci_device_get_iommu_bus_devfn(PCIDevice *dev, + PCIBus **aliased_pbus, + PCIBus **piommu_bus, + uint8_t *aliased_pdevfn) { PCIBus *bus = pci_get_bus(dev); PCIBus *iommu_bus = bus; @@ -2717,6 +2720,18 @@ AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) iommu_bus = parent_bus; } + *aliased_pbus = bus; + *piommu_bus = iommu_bus; + *aliased_pdevfn = devfn; +} + +AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) +{ + PCIBus *bus; + PCIBus *iommu_bus; + uint8_t devfn; + + pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn); if (!pci_bus_bypass_iommu(bus) && iommu_bus->iommu_ops) { return iommu_bus->iommu_ops->get_address_space(bus, iommu_bus->iommu_opaque, devfn); @@ -2724,6 +2739,38 @@ AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) return &address_space_memory; } +int pci_device_set_iommu_device(PCIDevice *dev, IOMMUFDDevice *idev, + Error **errp) +{ + PCIBus *bus; + PCIBus *iommu_bus; + uint8_t devfn; + + pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn); + if (!pci_bus_bypass_iommu(bus) && iommu_bus && + iommu_bus->iommu_ops && iommu_bus->iommu_ops->set_iommu_device) { + return iommu_bus->iommu_ops->set_iommu_device(pci_get_bus(dev), + iommu_bus->iommu_opaque, + dev->devfn, idev, errp); + } + return 0; +} + +void pci_device_unset_iommu_device(PCIDevice *dev) +{ + PCIBus *bus; + PCIBus *iommu_bus; + uint8_t devfn; + + pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn); + if (!pci_bus_bypass_iommu(bus) && iommu_bus && + iommu_bus->iommu_ops && iommu_bus->iommu_ops->unset_iommu_device) { + return iommu_bus->iommu_ops->unset_iommu_device(pci_get_bus(dev), + iommu_bus->iommu_opaque, + dev->devfn); + } +} + void pci_setup_iommu(PCIBus *bus, const PCIIOMMUOps *ops, void *opaque) { /*