Messages in this thread | | | Subject | Re: [PATCH v1 4/9] iommu/vt-d: Add bounce buffer API for domain map/unmap | From | Lu Baolu <> | Date | Wed, 13 Mar 2019 10:04:41 +0800 |
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Hi,
On 3/13/19 12:38 AM, Christoph Hellwig wrote: > On Tue, Mar 12, 2019 at 02:00:00PM +0800, Lu Baolu wrote: >> This adds the APIs for bounce buffer specified domain >> map() and unmap(). The start and end partial pages will >> be mapped with bounce buffered pages instead. This will >> enhance the security of DMA buffer by isolating the DMA >> attacks from malicious devices. > > Please reuse the swiotlb code instead of reinventing it. >
I don't think we are doing the same thing as swiotlb here. But it's always a good thing to reuse code if possible. I considered this when writing this code, but I found it's hard to do. Do you mind pointing me to the code which I could reuse?
Best regards, Lu Baolu
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