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Commit 42e8c186 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu/vt-d: Simplify io/tlb flushing in intel_iommu_unmap 



We don't need to do an expensive search for domain-ids
anymore, as we keep track of per-iommu domain-ids.

Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 29a27719

drivers/iommu/intel-iommu.c

+3 −12
Original line number Diff line number Diff line
@@ -4834,7 +4834,7 @@ static size_t intel_iommu_unmap(struct iommu_domain *domain, 
	struct intel_iommu *iommu;

	unsigned long start_pfn, last_pfn;

	unsigned int npages;

	int iommu_id, num, ndomains, level = 0;

	int iommu_id, level = 0;



	/* Cope with horrid API which requires us to unmap more than the

	   size argument if it happens to be a large-page mapping. */
@@ -4854,17 +4854,8 @@ static size_t intel_iommu_unmap(struct iommu_domain *domain, 
	for_each_domain_iommu(iommu_id, dmar_domain) {

		iommu = g_iommus[iommu_id];



		/*

		 * find bit position of dmar_domain

		 */

		ndomains = cap_ndoms(iommu->cap);

		for_each_set_bit(num, iommu->domain_ids, ndomains) {

			if (get_iommu_domain(iommu, num) == dmar_domain)

				iommu_flush_iotlb_psi(iommu, dmar_domain,

						      start_pfn, npages,

						      !freelist, 0);

		}



		iommu_flush_iotlb_psi(g_iommus[iommu_id], dmar_domain,

				      start_pfn, npages, !freelist, 0);

	}



	dma_free_pagelist(freelist);