From mboxrd@z Thu Jan 1 00:00:00 1970 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 ADB7CCAC59F for ; Thu, 18 Sep 2025 09:06:21 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1uzAU0-0000zL-0r; Thu, 18 Sep 2025 04:59:16 -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 1uzATf-0000nf-C5 for qemu-devel@nongnu.org; Thu, 18 Sep 2025 04:58:56 -0400 Received: from mgamail.intel.com ([192.198.163.8]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1uzATb-0004jY-Vm for qemu-devel@nongnu.org; Thu, 18 Sep 2025 04:58:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1758185932; x=1789721932; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=6jUjg5pnEKUCtmopQiEeK7RdE4CDjp9rACNAGirYJK0=; b=eHtJ0tvPY3bPaX4fffqeSLkn+EAdaBPBxoqwVVQhGu2iv8F9ucsktG+1 DqpvsNEJ6mjnzHJ+KmrjNeovv+bYIEDVOwdyWRpC4T0Ee7BBmQd6HR/vg 3QYkAw5wWmhZ8sfeoBbQBW/V7lCbi7gMaSid2IxO/xeaom/5z460Ri+mB B8AgYlv4pSyKWhsW5ynMbKKKMTD5/SLitKqUQ2KmWTrLz2ViysoeCmd7Z Hty0v/9Oz3+AzMIfFRMw5TFmNdm/91dZ1VpVqdndhKDGNHcaSkzaQ7H71 mfcolFeKwIr4cD0Y9f8A5mjPJZny+ceHvzDjH0Y20Olojywpv3d9gPE2J A==; X-CSE-ConnectionGUID: //Do5RJHTsexakM6wbwY/g== X-CSE-MsgGUID: vSRXZ+HYTd+wDkASf3BlVg== X-IronPort-AV: E=McAfee;i="6800,10657,11556"; a="78109416" X-IronPort-AV: E=Sophos;i="6.18,274,1751266800"; d="scan'208";a="78109416" Received: from fmviesa009.fm.intel.com ([10.60.135.149]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Sep 2025 01:58:49 -0700 X-CSE-ConnectionGUID: SDan467lTnu/59LbtCrbJA== X-CSE-MsgGUID: EKGYlsuBRmeDknjsqLY6MQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.18,274,1751266800"; d="scan'208";a="175930318" Received: from unknown (HELO gnr-sp-2s-612.sh.intel.com) ([10.112.230.229]) by fmviesa009-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Sep 2025 01:58:45 -0700 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, eric.auger@redhat.com, mst@redhat.com, jasowang@redhat.com, peterx@redhat.com, ddutile@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, skolothumtho@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 Subject: [PATCH v6 04/22] hw/pci: Export pci_device_get_iommu_bus_devfn() and return bool Date: Thu, 18 Sep 2025 04:57:43 -0400 Message-ID: <20250918085803.796942-5-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20250918085803.796942-1-zhenzhong.duan@intel.com> References: <20250918085803.796942-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=192.198.163.8; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, 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_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=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: 2.1.29 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 Returns true if PCI device is aliased or false otherwise. This will be used in following patch to determine if a PCI device is under a PCI bridge. Signed-off-by: Zhenzhong Duan Reviewed-by: Eric Auger Reviewed-by: Nicolin Chen Reviewed-by: Yi Liu --- include/hw/pci/pci.h | 2 ++ hw/pci/pci.c | 12 ++++++++---- 2 files changed, 10 insertions(+), 4 deletions(-) diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index 6bccb25ac2..bde9dca8e2 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -637,6 +637,8 @@ typedef struct PCIIOMMUOps { bool is_write); } PCIIOMMUOps; +bool pci_device_get_iommu_bus_devfn(PCIDevice *dev, PCIBus **piommu_bus, + PCIBus **aliased_bus, int *aliased_devfn); AddressSpace *pci_device_iommu_address_space(PCIDevice *dev); bool pci_device_set_iommu_device(PCIDevice *dev, HostIOMMUDevice *hiod, Error **errp); diff --git a/hw/pci/pci.c b/hw/pci/pci.c index c3df9d6656..4d4b9dda4d 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -2860,20 +2860,21 @@ static void pci_device_class_base_init(ObjectClass *klass, const void *data) * For call sites which don't need aliased BDF, passing NULL to * aliased_[bus|devfn] is allowed. * + * Returns true if PCI device RID is aliased or false otherwise. + * * @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) +bool 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; int devfn = dev->devfn; + bool aliased = false; while (iommu_bus && !iommu_bus->iommu_ops && iommu_bus->parent_dev) { PCIBus *parent_bus = pci_get_bus(iommu_bus->parent_dev); @@ -2910,6 +2911,7 @@ static void pci_device_get_iommu_bus_devfn(PCIDevice *dev, devfn = parent->devfn; bus = parent_bus; } + aliased = true; } /* @@ -2944,6 +2946,8 @@ static void pci_device_get_iommu_bus_devfn(PCIDevice *dev, if (aliased_devfn) { *aliased_devfn = devfn; } + + return aliased; } AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) -- 2.47.1