Hi,
There's a change pending to enable PSCI on HiKey: https://github.com/96boards/linux/pull/15
A regression is introduced when using HiSilicon bootloader: we'll have one core when using Hisilicon's bootloader.
Here's the summary: * current dtb + hisilicon bootloader: boot images, all cores enabled * current dtb + uefi: boot images, one core enabled * psci enabled dtb + hisilicon bootloader: boot images, one core enabled * psci enabled dtb + uefi: boot images, all cores enabled
It won't be much of an issue since the long term plan is to deprecate HiSilicon bootloader in favor of UEFI. Unfortunately, UEFI isn't feature complete (SD card support missing, flash to eMMC limited to 128M, etc...).
In the meantime, moving forward it's proposed to provide a legacy dtb and use the PSCI enabled combination (UEFI + kernel) as the default as it is the long term plan. It mitigates the issue for people using HiSilicon bootloader while it enables people using UEFI.
Another option is to keep the status quo until UEFI is there (speculation is "in 2 weeks") and switch the default dtb at that time.
The question is which default dtb should be used? Opinions?
Cheers, Fathi