On 2021-02-02 14:41, Joerg Roedel wrote:
On Tue, Feb 02, 2021 at 02:34:34PM +0000, Robin Murphy wrote:
Nope, I believe if Arm Ltd. had any involvement in this I'd know about it :)
Okay, got confused by thinking of ARM as the CPU architecture, not the
company :)
But given the intel/ and amd/ subdirectories refer to company names as
well, the same is true for arm/.
Right, trying to group IOMMU drivers by supposed CPU architecture is
already a demonstrable non-starter; does intel-iommu count as x86, or
IA-64, or do you want two copies? :P
I somehow doubt anyone would license one of Arm's SMMUs to go in a
RISC-V/MIPS/etc. based SoC, but in principle, they *could*. In fact it's
precisely cases like this one - where silicon vendors come up with their
own little scatter-gather unit to go with their own display controller
etc. - that I imagine are most likely to get reused if the vendor
decides to experiment with different CPUs to reach new market segments.
Robin.
