[coreboot] Why coreboot for riscv does not support multi-core?

[王翔]

The current code does not set the stack pointer for hart alone.
The Linux kernel runs in s-mode and cannot set the stack pointer for m-mode.
If m-mode does not have a separate stack for hart, then m-mode cannot save any state about the current hart.

Is it necessary to initialize the stack pointer for each hart?

Looking forward to your reply. Thank you.

WangXiang