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iommu/vt-d: Implement apply_resv_region iommu ops entry 

Used by iommu.c before creating identity mappings for reserved
ranges to ensure dma-ops won't ever remap these ranges.

Signed-off-by: James Sewart <jamessewart@arista.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
James Sewart 2019-05-25 13:41:23 +08:00 committed by Joerg Roedel
parent 7423e01741
commit 73bcbdc9fa
1 changed files with 14 additions and 0 deletions
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14
drivers/iommu/intel-iommu.c
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@ -5549,6 +5549,19 @@ int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct device *dev)
return ret;
}
static void intel_iommu_apply_resv_region(struct device *dev,
struct iommu_domain *domain,
struct iommu_resv_region *region)
{
struct dmar_domain *dmar_domain = to_dmar_domain(domain);
unsigned long start, end;
start = IOVA_PFN(region->start);
end = IOVA_PFN(region->start + region->length - 1);
WARN_ON_ONCE(!reserve_iova(&dmar_domain->iovad, start, end));
}
#ifdef CONFIG_INTEL_IOMMU_SVM
struct intel_iommu *intel_svm_device_to_iommu(struct device *dev)
{
@ -5714,6 +5727,7 @@ const struct iommu_ops intel_iommu_ops = {
.remove_device = intel_iommu_remove_device,
.get_resv_regions = intel_iommu_get_resv_regions,
.put_resv_regions = intel_iommu_put_resv_regions,
.apply_resv_region = intel_iommu_apply_resv_region,
.device_group = pci_device_group,
.dev_has_feat = intel_iommu_dev_has_feat,
.dev_feat_enabled = intel_iommu_dev_feat_enabled,