On Wed, 4 May 2022 12:12:44 +0200, Laurent Dufour wrote:
> RTAS runs in real mode (MSR[DR] and MSR[IR] unset) and in 32bits
> big endian mode (MSR[SF,LE] unset).
>
> The change in MSR is done in enter_rtas() in a relatively complex way,
> since the MSR value could be hardcoded.
>
> Furthermore, a panic has been reported when hitting the watchdog interrupt
> while running in RTAS, this leads to the following stack trace:
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/rtas: Keep MSR[RI] set when calling RTAS
https://git.kernel.org/powerpc/c/b6b1c3ce06ca438eb24e0f45bf0e63ecad0369f5
cheers
