[RESEND PATCH v1 02/37] iommu/amd: Introduce pci segment structure

Newer AMD systems can support multiple PCI segments, where each segment contains one or more IOMMU instances. However, an IOMMU instance can only support a single PCI segment. Current code assumes that system contains only one pci segment (segment 0) and creates global data structures such as devi

[PATCH v1 02/37] iommu/amd: Introduce pci segment structure

Newer AMD systems can support multiple PCI segments, where each segment contains one or more IOMMU instances. However, an IOMMU instance can only support a single PCI segment. Current code assumes that system contains only one pci segment (segment 0) and creates global data structures such as devi