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iommu/vt-d: Expose ISA direct mapping region via iommu_get_resv_regions 

To support mapping ISA region via iommu_group_create_direct_mappings,
make sure its exposed by iommu_get_resv_regions.

Signed-off-by: James Sewart <jamessewart@arista.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2019-05-25 13:41:24 +08:00 committed by Joerg Roedel
parent 73bcbdc9fa
commit d850c2ee5f
1 changed files with 13 additions and 0 deletions
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13
drivers/iommu/intel-iommu.c
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@ -5479,6 +5479,19 @@ static void intel_iommu_get_resv_regions(struct device *device,
} }
rcu_read_unlock(); rcu_read_unlock();
#ifdef CONFIG_INTEL_IOMMU_FLOPPY_WA
if (dev_is_pci(device)) {
struct pci_dev *pdev = to_pci_dev(device);
if ((pdev->class >> 8) == PCI_CLASS_BRIDGE_ISA) {
reg = iommu_alloc_resv_region(0, 1UL << 24, 0,
IOMMU_RESV_DIRECT);
if (reg)
list_add_tail(&reg->list, head);
}
}
#endif /* CONFIG_INTEL_IOMMU_FLOPPY_WA */
reg = iommu_alloc_resv_region(IOAPIC_RANGE_START, reg = iommu_alloc_resv_region(IOAPIC_RANGE_START,
IOAPIC_RANGE_END - IOAPIC_RANGE_START + 1, IOAPIC_RANGE_END - IOAPIC_RANGE_START + 1,
0, IOMMU_RESV_MSI); 0, IOMMU_RESV_MSI);