Hi Mark, Thanks for raising valid points/concerns. On Mon, Feb 24, 2025 at 10:08:18AM +0000, Vincenzo Frascino wrote: > Hello Mark, > > On 21/02/2025 18:54, Mark Rutland wrote: > > Hi Vincenzo, > > > > On Fri, Feb 21, 2025 at 06:03:39PM +0000, Vincenzo Frascino wrote: > >> The Morello architecture is an experimental extension to Armv8.2-A, > >> which extends the AArch64 state with the principles proposed in > >> version 7 of the Capability Hardware Enhanced RISC Instructions > >> (CHERI) ISA [1]. > > > > None of the CHERI stuff is supported upstream, so from upstream's PoV > > this is a low-volume dev-board/SoC with an experimental ARMv8.2-A CPU. > > I understand and agree with your concerns. > > Agreed, I have no plans to upstream Morello support beyond the device tree. > > >> This series adds dts support for the Arm Morello System Development > >> Platform. > > > > Do we actually need the dts for this board? > > > > I have one on my desk; it boots vanilla Debian 12 via UEFI + ACPI just > > fine, with the Debian 6.1.0-13-arm64 kernel. > > > > Is there something that we can only do with the DT? i.e. some > > functionality that isn't exposed via ACPI? > > > > How do you expect this DT to be used? > > > > There are functionalities that are not exposed via ACPI, e.g. gpu, dpu, i2c for > the phy, etc. My aim to have upstream support for all the hardware exposed by > the platform. > Does this address some of your concerns ? I do understand some of these are not well addressed in ACPI and hence people use DT as an alternative. > Note: This series contains only the basic infrastructure, the plan is add > progressively more features in the future. > I was thinking of queuing this in -next if all the bindings are acked. Let me know if you still have concerns and would like to avoid getting these merged. I will hold off then. -- Regards, Sudeep
