From: Yi Liu <yi.l....@intel.com> Introduce pci_device_iommu_get_attr() to get vIOMMU attributes from the PCI device.
This is in preparation to ask if vIOMMU has dma translation enabled and also to get IOVA boundaries. Signed-off-by: Yi Liu <yi.l....@intel.com> [joao: Massage commit message; add one more argument in pci_device_get_iommu_bus_devfn(); rename to pci_device_iommu_get_attr() to align with the other already namespaced function. ] Signed-off-by: Joao Martins <joao.m.mart...@oracle.com> --- follow-up version from: https://lore.kernel.org/all/20210302203827.437645-6-yi.l....@intel.com/ --- include/hw/pci/pci.h | 4 ++++ hw/pci/pci.c | 16 ++++++++++++++++ 2 files changed, 20 insertions(+) diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index f59aef5a329a..10c81287b6b3 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -372,8 +372,12 @@ 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, + enum IOMMUMemoryRegionAttr attr, void *data); }; void pci_setup_iommu_ops(PCIBus *bus, const PCIIOMMUOps *iommu_ops, void *opaque); +int pci_device_iommu_get_attr(PCIDevice *dev, enum IOMMUMemoryRegionAttr attr, + void *data); pcibus_t pci_bar_address(PCIDevice *d, int reg, uint8_t type, pcibus_t size); diff --git a/hw/pci/pci.c b/hw/pci/pci.c index 90ae92a43d85..91ba6f0927a4 100644 --- a/hw/pci/pci.c +++ b/hw/pci/pci.c @@ -2710,6 +2710,22 @@ AddressSpace *pci_device_iommu_address_space(PCIDevice *dev) return &address_space_memory; } +int pci_device_iommu_get_attr(PCIDevice *dev, enum IOMMUMemoryRegionAttr attr, + void *data) +{ + PCIBus *bus, *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->get_iommu_attr) { + return iommu_bus->iommu_ops->get_iommu_attr(bus, iommu_bus->iommu_opaque, + devfn, attr, data); + } + + return -ENOENT; +} + void pci_setup_iommu(PCIBus *bus, PCIIOMMUFunc fn, void *opaque) { bus->iommu_fn = fn; -- 2.17.2
