Re: [kvm-unit-tests PATCH 0/3] riscv: Improved bare metal support

[Andrew Jones <andrew.jones@linux.dev>]

On Mon, Dec 09, 2024 at 10:44:39PM -0600, Samuel Holland wrote:
> Here are a few patches which are just enough to run the SBI unit tests
> in a bare metal environment, under U-Boot on boards with a UART needing
> 32-bit MMIO (which is a rather common configuration in my experience).
> Though I wonder if we should prefer the SBI debug console extension for
> puts() output when available.

Hi Samuel,

Thanks for this! I think using SBI debug console is probably the best
choice. That's what I decided to do for booting on the bananapi. We
can keep the uart improvements though for a best effort fallback
when DBCN isn't available.

Thanks,
drew

> 
> Samuel Holland (3):
>   riscv: Add Image header to flat binaries
>   riscv: Rate limit UART output to avoid FIFO overflows
>   riscv: Support UARTs with different I/O widths
> 
>  lib/riscv/io.c | 47 +++++++++++++++++++++++++++++++++++++++++++++--
>  riscv/cstart.S | 16 +++++++++++++++-
>  2 files changed, 60 insertions(+), 3 deletions(-)
> 
> -- 
> 2.39.3 (Apple Git-146)
>