Re: RiscV SBI incompatibilities?

[Yao Zi <me@ziyao.cc>]

On Wed, Nov 11, 2026 at 03:35:48PM +0100, Martin Husemann wrote:
> Hi folks,
> 
> maybe I tried something stupid, but it felt like a good idea at first.
> 
> I am updating my VisionFive 2 board from an oldish installation with
> U-Boot 2024.10.
> 
> To have as few moving parts as possible, I build 2026.10 with the same SBI
> that I had lying around from the original 2024.10 build, which happend
> to be OpenSBI 1.4.
> 
> This failed spectacularily: most sbc_* calls for HSM fail with 
> -3 (SBI_ERR_INVALID_PARAM).
> 
> A few calls worked, like sbi_hart_start() and sbi_hart_get_status(),
> which told me the hartids I was using were valid, but then doing
> e.g. sbi_send_ipi() or sbi_remote_sfence_vma() failed.
> 
> Does this ring a bell? Is it expected? Did I overlook a "minimal SBI version
> 1.X" somewhere?

doc/board/starfive/jh7110_common.rst says,

> 3.  U-Boot for JH-7110 requires OpenSBI v1.5+ generic platform object
>     fw_dynamic.bin to be included in the Flattened Image Tree blob. OpenSBI may
>     first be built as below:

I had a brief look through the changes from v1.4 to v1.5, and suspect it
has something to do with OpenSBI commit c5be0e1ed1fa ("lib: utils/ipi:
Skip initialize ipi when dt is not enabled")[1], but don't confirm it :)

> Martin

-- 
Thanks,
Yao Zi

Meow-mrrp-mrow, I'm a cat.

[1]: https://github.com/riscv-software-src/opensbi/commit/c5be0e1ed1fa17b9f9abb49e80db014e067523e4