[PATCH v5 04/27] iommu/io-pgtable-arm: Factor kernel specific code out

[Jason Gunthorpe]

On Fri, Dec 12, 2025 at 03:37:43PM +0000, Mostafa Saleh wrote:
> On Fri, Nov 28, 2025 at 12:45:41PM -0400, Jason Gunthorpe wrote:
> > On Mon, Nov 17, 2025 at 06:47:51PM +0000, Mostafa Saleh wrote:
> > > Some of the used APIs are only part of the kernel and are not
> > > available in the hypervisor, factor those out:
> > > - alloc/free memory
> > 
> > Why not provide the iommu-pages API for the hypervisor environment?
> > 
> > Same for virt_to_phys, that could be moved into an iommu-pages wrapper
> > too..
> 
> I guess that's possible, but then we would have to stub dma_map/unmap,
> which might a bit ugly. I will look more into it.

I am hoping to drop the dma_map/unmap and replace it with an arch
cache flush call directly since the code is no longer modular and
relying on the DMA API will have some problems with a future patch
series I'm expecting..

Jason