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unknown committed Apr 16, 2024
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3 changes: 2 additions & 1 deletion source/_posts/linux/内核-驱动/dma/iommu流程.md
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Expand Up @@ -6,4 +6,5 @@ pci_map_single
domain_pfn_mapping

# 如何知道哪些设备的dma要走页表进行转换,哪些设备的dma不需要进行地址转换呢
,contex_entry的format里面有一个标志位(TT)来表明这个设备的DMA是否是paasthroug
,contex_entry的format里面有一个标志位(TT)来表明这个设备的DMA是否是paasthroug
![alt text](../../../../../../../medias/images_0/iommu流程_image.png)

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