Anyone has a pointer to what "Blocked on PSCI discussion" means ? I'd be interested to read those (mailing list?) discussions.
It hasn't really started yet, other than some discussions on IRC, but the TL;DR is on every other ARM64 system those features are handled by either a hypervisor or a supervisor, via special PSCI calls. These machines don't have the option for a supervisor (and no nested virtualization, so an under-OS hypervisor would preclude VMs). Rather than introducing a special snowflake driver for these machines, the current thi…
- Doesn't ARMv8 architecture require supervisor mode? You should be able to just pop a good old Arm Trusted Framework sample, implement PSCI in there just like other standard ARMv8?
- Linux kernel already supports various PSCI-less architectures (rpi4 notably for armv8 if I'm not mistaken), so I don't think upstream would mind about that at all?
I guess your proposed approach makes sense when the target is more than just Linux though, do you have hopes that m1n1 could be eventually suitable to boot Windows?