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authorJoerg Roedel <jroedel@suse.de>2015-07-21 15:50:02 +0200
committerJoerg Roedel <jroedel@suse.de>2015-08-12 16:23:34 +0200
commit42e8c186b595a32918933b3dec445f0bf0f486f6 (patch)
tree01d79bc6954e9b227ecfc730364e425cba12ea66 /drivers/iommu
parent29a27719abaa4d74aed928803c1aa9437bbdde89 (diff)
downloadop-kernel-dev-42e8c186b595a32918933b3dec445f0bf0f486f6.zip
op-kernel-dev-42e8c186b595a32918933b3dec445f0bf0f486f6.tar.gz
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 <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/intel-iommu.c15
1 files changed, 3 insertions, 12 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a5aa957..57c115c 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);
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