Re: [PATCH v2 0/8] Support IOMMU page sizes larger than the CPU page size

[Alyssa Rosenzweig]

> Some background: On the Apple M1 the IOMMUs are hardwired to only support 16 KB pages.
> We'd still like to boot Linux with 4KB pages though because that's what most distros
> ship these days. This patch series adds support for that setup to the IOMMU DMA API.

This isn't just a distro issue -- efficient x86_64 emulation will rely
on 4KB as well (Rosetta, FEX, ...). Telling distros to use 16KB kernels
for Apple parts is just kicking the can down the road -- we want this
series even for kernels we build ourselves.