Messages in this thread Patch in this message | | | From | Lu Baolu <> | Subject | [PATCH v4 03/15] iommu/vt-d: Expose ISA direct mapping region via iommu_get_resv_regions | Date | Sat, 25 May 2019 13:41:24 +0800 |
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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> --- drivers/iommu/intel-iommu.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 4d0fa3097f5d..c42317e27b0c 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -5520,6 +5520,20 @@ static void intel_iommu_get_resv_regions(struct device *device, } 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, + GFP_KERNEL); + if (reg) + list_add_tail(®->list, head); + } + } +#endif /* CONFIG_INTEL_IOMMU_FLOPPY_WA */ + reg = iommu_alloc_resv_region(IOAPIC_RANGE_START, IOAPIC_RANGE_END - IOAPIC_RANGE_START + 1, 0, IOMMU_RESV_MSI, GFP_KERNEL); -- 2.17.1
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