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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>
steinar/wifi_calib_4_9_kernel
Joerg Roedel 2015-07-21 15:50:02 +02:00
parent 29a27719ab
commit 42e8c186b5
1 changed files with 3 additions and 12 deletions
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15
drivers/iommu/intel-iommu.c
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@ -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);