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06b38473cd
Add support for synthesizing a PCIe PASID extended capability for vfio-pci devices when PASID is enabled via a vIOMMU and supported by the host IOMMU backend. PASID capability parameters are retrieved via IOMMUFD APIs and the capability is inserted into the PCIe extended capability list using the insertion helper. A new x-vpasid-cap-offset property allows explicit control over the placement; by default the capability is placed at the end of the PCIe extended configuration space. If the kernel does not expose PASID information or insertion fails, the device continues without PASID support. Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com> Tested-by: Eric Auger <eric.auger@redhat.com> Tested-by: Zhangfei Gao <zhangfei.gao@linaro.org> Reviewed-by: Cédric Le Goater <clg@redhat.com> Signed-off-by: Shameer Kolothum <skolothumtho@nvidia.com> Reviewed-by: Yi Liu <yi.l.liu@intel.com> Message-id: 20260126104342.253965-37-skolothumtho@nvidia.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>