Re: [RFC PATCH 1/2] x86: Don't let pgprot_modify() change the page encryption bit

[Thomas HellstrÃm (VMware)]

On 9/5/19 5:24 PM, Christoph Hellwig wrote:
> On Thu, Sep 05, 2019 at 05:21:24PM +0200, Thomas HellstrÃm (VMware) wrote:
> > On 9/5/19 4:15 PM, Dave Hansen wrote:
> > > Hi Thomas,
> > >
> > > Thanks for the second batch of patches!  These look much improved on all
> > > fronts.
> > Yes, although the TTM functionality isn't in yet. Hopefully we won't have to
> > bother you with those though, since this assumes TTM will be using the dma
> > API.
> Please take a look at dma_mmap_prepare and dma_mmap_fault in this
> branch:
>
> 	http://git.infradead.org/users/hch/misc.git/shortlog/refs/heads/dma-mmap-improvements
>
> they should allow to fault dma api pages in the page fault handler.  But
> this is totally hot off the press and not actually tested for the last
> few patches.  Note that I've also included your two patches from this
> series to handle SEV.

Thanks, Christoph.

I'll get to this tomorrow.

/Thomas