intel-iommu: Don't just mask out too-big physical addresses; BUG() instead
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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@ -700,8 +700,7 @@ static struct dma_pte * addr_to_dma_pte(struct dmar_domain *domain, u64 addr)
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unsigned long flags;
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BUG_ON(!domain->pgd);
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addr &= (((u64)1) << addr_width) - 1;
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BUG_ON(addr >> addr_width);
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parent = domain->pgd;
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spin_lock_irqsave(&domain->mapping_lock, flags);
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@ -783,8 +782,9 @@ static void dma_pte_clear_range(struct dmar_domain *domain, u64 start, u64 end)
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int addr_width = agaw_to_width(domain->agaw);
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int npages;
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start &= (((u64)1) << addr_width) - 1;
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end &= (((u64)1) << addr_width) - 1;
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BUG_ON(start >> addr_width);
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BUG_ON((end-1) >> addr_width);
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/* in case it's partial page */
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start &= PAGE_MASK;
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end = PAGE_ALIGN(end);
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@ -807,8 +807,8 @@ static void dma_pte_free_pagetable(struct dmar_domain *domain,
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int level;
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u64 tmp;
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start &= (((u64)1) << addr_width) - 1;
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end &= (((u64)1) << addr_width) - 1;
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BUG_ON(start >> addr_width);
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BUG_ON(end >> addr_width);
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/* we don't need lock here, nobody else touches the iova range */
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level = 2;
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@ -1654,7 +1654,7 @@ domain_page_mapping(struct dmar_domain *domain, dma_addr_t iova,
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int index;
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int addr_width = agaw_to_width(domain->agaw);
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hpa &= (((u64)1) << addr_width) - 1;
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BUG_ON(hpa >> addr_width);
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if ((prot & (DMA_PTE_READ|DMA_PTE_WRITE)) == 0)
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return -EINVAL;
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