[PATCH 0/3] arm: smh: Fix and improve semihosting traps

[Sean Anderson]

On 10/5/22 12:38, Andre Przywara wrote:
> While playing around with QEMU's semihosting implementation, I stared at
> our semihosting trap code, and found some issues, that this mini-series
> fixes.
> 
> Please have a look!
> 
> Cheers,
> Andre
> 
> Andre Przywara (3):
>    arm: smh: specify Thumb trap instruction
>    arm: smh: Make semihosting trap calls more robust
>    arm: smh: Allow semihosting trap calls to be inlined
> 
>   arch/arm/lib/semihosting.c | 44 +++++++++++++++++++++++++++-----------
>   1 file changed, 31 insertions(+), 13 deletions(-)
> 

This all LGTM

Although I wonder if we should just move smh_trap into an assembly file.
I think that would apply most of these optimization barriers.

Your series will also confict with Kautuk's series [1]. I think the bugs
you described above will apply to RISC-V as well.

--Sean

[1] https://lore.kernel.org/all/20220923070320.617623-1-kconsul@ventanamicro.com/