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bh=XLDP4eW2xkgtMCC/IcVRlbka3/PL5Xups7xg3OV5U4E=; b=ZFLJxHYoujTFPdvzOhX65o2Qvtc67UGkXnZ/89BnoVClJPUImwUG6IrSFkLmJKnP+sRoJe OW396MKMxLBJ3KIyMrK8/LRwsHcylYtnrYZ/Z9P5GOLr08HFMUUvlgxPIAF0hT2CMyPH1X xsdKzSdR/zP2CrcbKuIB1PYbhiDFF3Q= X-MC-Unique: 3QDMzPqQNkGZ5z8l9WGP9Q-1 From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, jean-philippe@linaro.org, alex.williamson@redhat.com, peter.maydell@linaro.org, zhenzhong.duan@intel.com, peterx@redhat.com, yanghliu@redhat.com, pbonzini@redhat.com Cc: mst@redhat.com, clg@redhat.com Subject: [RFC 2/7] hw/pci: Introduce pci_device_iommu_bus Date: Wed, 17 Jan 2024 09:02:06 +0100 Message-ID: <20240117080414.316890-3-eric.auger@redhat.com> In-Reply-To: <20240117080414.316890-1-eric.auger@redhat.com> References: <20240117080414.316890-1-eric.auger@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.5 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" This helper will allow subsequent patches to retrieve the IOMMU bus and call its associated PCIIOMMUOps callbacks. Signed-off-by: Eric Auger --- include/hw/pci/pci.h | 1 + hw/pci/pci.c | 16 ++++++++++++++++ 2 files changed, 17 insertions(+) diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index 63c018b35a..649b327f9f 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -403,6 +403,7 @@ typedef struct PCIIOMMUOps { } PCIIOMMUOps; =20 AddressSpace *pci_device_iommu_address_space(PCIDevice *dev); +PCIBus *pci_device_iommu_bus(PCIDevice *dev); =20 /** * pci_setup_iommu: Initialize specific IOMMU handlers for a PCIBus diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 76080af580..5bf07662fe 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -2672,6 +2672,22 @@ static void pci_device_class_base_init(ObjectClass *= klass, void *data) } } =20 +PCIBus *pci_device_iommu_bus(PCIDevice *dev) +{ + PCIBus *bus =3D pci_get_bus(dev); + PCIBus *iommu_bus =3D bus; + + while (iommu_bus && !iommu_bus->iommu_ops && iommu_bus->parent_dev) { + PCIBus *parent_bus =3D pci_get_bus(iommu_bus->parent_dev); + + iommu_bus =3D parent_bus; + } + if (pci_bus_bypass_iommu(bus)) { + return NULL; + } + return iommu_bus; +} + AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) { PCIBus *bus =3D pci_get_bus(dev); --=20 2.41.0