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

[王翔]

> In short: Because it was easier to delay the problem until later.
>
> On Thu, May 17, 2018 at 03:55:37PM +0800, 王翔 wrote:
> > 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?
>
> Yes, I think this needs to be implemented.
>
> Note also, that the new SBI based on the ecall instruction is not
> implemented in coreboot.
>
> Jonathan Neuschäfer

Is coreboot's payload a bootloader running in m-mode ?
If not, how does the SBI interrupt service be implemented ?

WangXiang