iommu/vt-d: Use iova over first level
After we make all map/unmap paths support first level page table. Let's turn it on if hardware supports scalable mode. Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
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@ -1770,15 +1770,13 @@ static void free_dmar_iommu(struct intel_iommu *iommu)
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/*
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/*
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* Check and return whether first level is used by default for
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* Check and return whether first level is used by default for
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* DMA translation. Currently, we make it off by setting
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* DMA translation.
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* first_level_support = 0, and will change it to -1 after all
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* map/unmap paths support first level page table.
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*/
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*/
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static bool first_level_by_default(void)
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static bool first_level_by_default(void)
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{
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{
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struct dmar_drhd_unit *drhd;
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struct dmar_drhd_unit *drhd;
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struct intel_iommu *iommu;
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struct intel_iommu *iommu;
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static int first_level_support = 0;
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static int first_level_support = -1;
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if (likely(first_level_support != -1))
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if (likely(first_level_support != -1))
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return first_level_support;
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return first_level_support;
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