AMD IOMMU: save pci segment from ACPI tables

This patch adds the pci_seg field to the amd_iommu structure and fills
it with the corresponding value from the ACPI table.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/amd_iommu_init.c

@@ -676,6 +676,7 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
 	 */
 	iommu->devid = h->devid;
 	iommu->cap_ptr = h->cap_ptr;
+	iommu->pci_seg = h->pci_seg;
 	iommu->mmio_phys = h->mmio_phys;
 	iommu->mmio_base = iommu_map_mmio_space(h->mmio_phys);
 	if (!iommu->mmio_base)

include/asm-x86/amd_iommu_types.h

@@ -232,6 +232,9 @@ struct amd_iommu {
 	/* capabilities of that IOMMU read from ACPI */
 	u32 cap;
 
+	/* pci domain of this IOMMU */
+	u16 pci_seg;
+
 	/* first device this IOMMU handles. read from PCI */
 	u16 first_device;
 	/* last device this IOMMU handles. read from PCI */