On Mon, 11 Jan 2021 16:24:08 +1000, Nicholas Piggin wrote:
> The L1D flush fallback functions are not recoverable vs interrupts,
> yet the scv entry flush runs with MSR[EE]=1. This can result in a
> timer (soft-NMI) or MCE or SRESET interrupt hitting here and overwriting
> the EXRFI save area, whic
The L1D flush fallback functions are not recoverable vs interrupts,
yet the scv entry flush runs with MSR[EE]=1. This can result in a
timer (soft-NMI) or MCE or SRESET interrupt hitting here and overwriting
the EXRFI save area, which ends up corrupting userspace registers for
scv return.
Fix this
