[PATCH v2 1/4] x86/mm: Export force_dma_unencrypted

Thomas Hellström (VMware) thomas_os at shipmail.org
Wed Sep 4 17:28:16 UTC 2019

On 9/4/19 2:22 PM, Christoph Hellwig wrote:
> On Wed, Sep 04, 2019 at 09:32:30AM +0200, Thomas Hellström (VMware) wrote:
>> That sounds great. Is there anything I can do to help out? I thought this
>> was more or less a dead end since the current dma_mmap_ API requires the
>> mmap_sem to be held in write mode (modifying the vma->vm_flags) whereas
>> fault() only offers read mode. But that would definitely work.
> We'll just need to split into a setup and faul phase.  I have some
> sketches from a while ago, let me dust them off so that you can
> try them.

I'd be happy to.



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