[RFC 06/13] drm/i915/svm: Page table mirroring support

[Jason Gunthorpe]

On Mon, Nov 25, 2019 at 08:32:58AM -0800, Niranjan Vishwanathapura wrote:
> > And putting the cpu PFN of a ZONE_DEVICE device page into
> > sg_dma_address still looks very wrong to me
> 
> The below call in patch 7 does convert any cpu PFN to device address.
> So, it won't be CPU PFN.
> i915_dmem_convert_pfn(vm->i915, &range);

Well, then it should be done here in patch 6, surely?

> Also, only reason to use sgl list is because i915 driver page table update
> functions takes an sgl, otherwise we can directly deal with range.pfns array.

Maybe that should be fixed instead of abusing sgl

Jason