Messages in this thread | | | Date | Fri, 22 Nov 2013 07:02:16 -0800 | From | "H. Peter Anvin" <> | Subject | Re: [PATCH] x86: enable DMA CMA with swiotlb |
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On 11/22/2013 04:27 AM, Akinobu Mita wrote: > > I'm currently working for integrating DMA CMA with intel-iommu which > I can test. Regardless of which dma ops is actually used, I would > like to allocate large contiguous memory with dma_alloc_coherent() > and tell the base address to the device. > > We can use mem= or crashkernel= to reserve host memory, but it is > complicated and unables to work with real IOMMU. >
If you have a real iotlb, why would you need contiguous memory?
-hpa
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