From 42e8c186b595a32918933b3dec445f0bf0f486f6 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Tue, 21 Jul 2015 15:50:02 +0200 Subject: [PATCH] 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: Joerg Roedel --- drivers/iommu/intel-iommu.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index a5aa957a69d5..57c115cb351b 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -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);