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Commit 73bcbdc9 authored by James Sewart's avatar James Sewart Committed by Joerg Roedel
Browse files

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: default avatarJames Sewart <jamessewart@arista.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 7423e017

drivers/iommu/intel-iommu.c

+14 −0
Original line number Diff line number Diff line
@@ -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,