diff options
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/intel-iommu.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/pci/intel-iommu.c b/drivers/pci/intel-iommu.c index 3778ab1..a0ba568 100644 --- a/drivers/pci/intel-iommu.c +++ b/drivers/pci/intel-iommu.c @@ -164,7 +164,8 @@ static inline void context_clear_entry(struct context_entry *context) * 1: writable * 2-6: reserved * 7: super page - * 8-11: available + * 8-10: available + * 11: snoop behavior * 12-63: Host physcial address */ struct dma_pte { @@ -186,6 +187,11 @@ static inline void dma_set_pte_writable(struct dma_pte *pte) pte->val |= DMA_PTE_WRITE; } +static inline void dma_set_pte_snp(struct dma_pte *pte) +{ + pte->val |= DMA_PTE_SNP; +} + static inline void dma_set_pte_prot(struct dma_pte *pte, unsigned long prot) { pte->val = (pte->val & ~3) | (prot & 3); @@ -1685,6 +1691,8 @@ domain_page_mapping(struct dmar_domain *domain, dma_addr_t iova, BUG_ON(dma_pte_addr(pte)); dma_set_pte_addr(pte, start_pfn << VTD_PAGE_SHIFT); dma_set_pte_prot(pte, prot); + if (prot & DMA_PTE_SNP) + dma_set_pte_snp(pte); domain_flush_cache(domain, pte, sizeof(*pte)); start_pfn++; index++; @@ -3105,6 +3113,8 @@ static int intel_iommu_map_range(struct iommu_domain *domain, prot |= DMA_PTE_READ; if (iommu_prot & IOMMU_WRITE) prot |= DMA_PTE_WRITE; + if ((iommu_prot & IOMMU_CACHE) && dmar_domain->iommu_snooping) + prot |= DMA_PTE_SNP; max_addr = (iova & VTD_PAGE_MASK) + VTD_PAGE_ALIGN(size); if (dmar_domain->max_addr < max_addr) { |