From patchwork Mon Jun 3 06:10:18 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Duan, Zhenzhong" X-Patchwork-Id: 13683312 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 49E4DC27C4F for ; Mon, 3 Jun 2024 06:15:56 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sE0xT-0005UI-9D; Mon, 03 Jun 2024 02:14:15 -0400 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 1sE0xS-0005Tg-5v for qemu-devel@nongnu.org; Mon, 03 Jun 2024 02:14:14 -0400 Received: from mgamail.intel.com ([192.198.163.10]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sE0xQ-0000xl-FY for qemu-devel@nongnu.org; Mon, 03 Jun 2024 02:14:13 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1717395252; x=1748931252; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=lOqDt9v6x0LF0QRt0dafkaMf+eapZI59zjmfrdfGr4k=; b=gZ8KofgIatSVzhGtZQMl7I1UV1b1e9rb7zcQJsoKWpjWaBVQK7ySZcK2 RW2OQ1IFPnD/Wuvf81IaDIoOXH3veLtN9uXewuCPAe+veHwjI4vzB7oqQ M81nyoDpPL5QDvQSKPSCeQA6N7IzKV20tGLyk5Im89Z4DWWO3hbkPTE8z zkLUn2fvJjKyXoYRhF7w022OySVvEKtTnzPKk9clMQZC8TZEXQ0YmITNk 3OldL+CqI6G7IDtj+r+2I730Px8GVEW0p45S3QxgAkgUbR+8HxNApQib1 TSIcuIf2S/CZunrmOIJ4uSSXUSgcpzmsA5lhJAZY4Vod18RQFlaweEiV9 Q==; X-CSE-ConnectionGUID: AYsTM9uwSi+WX5NeoAl2dw== X-CSE-MsgGUID: 5E1UBGBgSASfzgk8CCVkNg== X-IronPort-AV: E=McAfee;i="6600,9927,11091"; a="25277743" X-IronPort-AV: E=Sophos;i="6.08,210,1712646000"; d="scan'208";a="25277743" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jun 2024 23:14:11 -0700 X-CSE-ConnectionGUID: NeqPSDyVTZm/VxymN3xtnQ== X-CSE-MsgGUID: BbodyjcQSB+vr4/lP+v8YA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,210,1712646000"; d="scan'208";a="36855967" Received: from unknown (HELO SPR-S2600BT.bj.intel.com) ([10.240.192.127]) by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Jun 2024 23:14:07 -0700 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, eric.auger@redhat.com, mst@redhat.com, peterx@redhat.com, jasowang@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, joao.m.martins@oracle.com, clement.mathieu--drif@eviden.com, kevin.tian@intel.com, yi.l.liu@intel.com, chao.p.peng@intel.com, Zhenzhong Duan , Yi Sun , Marcel Apfelbaum Subject: [PATCH v6 14/19] hw/pci: Introduce helper function pci_device_get_iommu_bus_devfn() Date: Mon, 3 Jun 2024 14:10:18 +0800 Message-Id: <20240603061023.269738-15-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240603061023.269738-1-zhenzhong.duan@intel.com> References: <20240603061023.269738-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.198.163.10; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -45 X-Spam_score: -4.6 X-Spam_bar: ---- X-Spam_report: (-4.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.142, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, 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 Extract out pci_device_get_iommu_bus_devfn() from pci_device_iommu_address_space() to facilitate implementation of pci_device_[set|unset]_iommu_device() in following patch. No functional change intended. Signed-off-by: Yi Liu Signed-off-by: Yi Sun Signed-off-by: Nicolin Chen Signed-off-by: Zhenzhong Duan Reviewed-by: Eric Auger --- hw/pci/pci.c | 48 +++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 45 insertions(+), 3 deletions(-) diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 324c1302d2..02a4bb2af6 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -2648,11 +2648,27 @@ static void pci_device_class_base_init(ObjectClass *klass, void *data) } } -AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) +/* + * Get IOMMU root bus, aliased bus and devfn of a PCI device + * + * IOMMU root bus is needed by all call sites to call into iommu_ops. + * For call sites which don't need aliased BDF, passing NULL to + * aliased_[bus|devfn] is allowed. + * + * @piommu_bus: return root #PCIBus backed by an IOMMU for the PCI device. + * + * @aliased_bus: return aliased #PCIBus of the PCI device, optional. + * + * @aliased_devfn: return aliased devfn of the PCI device, optional. + */ +static void pci_device_get_iommu_bus_devfn(PCIDevice *dev, + PCIBus **piommu_bus, + PCIBus **aliased_bus, + int *aliased_devfn) { PCIBus *bus = pci_get_bus(dev); PCIBus *iommu_bus = bus; - uint8_t devfn = dev->devfn; + int devfn = dev->devfn; while (iommu_bus && !iommu_bus->iommu_ops && iommu_bus->parent_dev) { PCIBus *parent_bus = pci_get_bus(iommu_bus->parent_dev); @@ -2693,7 +2709,33 @@ AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) iommu_bus = parent_bus; } - if (!pci_bus_bypass_iommu(bus) && iommu_bus->iommu_ops) { + + assert(0 <= devfn && devfn < PCI_DEVFN_MAX); + assert(iommu_bus); + + if (pci_bus_bypass_iommu(bus) || !iommu_bus->iommu_ops) { + iommu_bus = NULL; + } + + *piommu_bus = iommu_bus; + + if (aliased_bus) { + *aliased_bus = bus; + } + + if (aliased_devfn) { + *aliased_devfn = devfn; + } +} + +AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) +{ + PCIBus *bus; + PCIBus *iommu_bus; + int devfn; + + pci_device_get_iommu_bus_devfn(dev, &iommu_bus, &bus, &devfn); + if (iommu_bus) { return iommu_bus->iommu_ops->get_address_space(bus, iommu_bus->iommu_opaque, devfn); }