> What about arch/powerpc/kernel/exceptions-64e.S, no change required
> inside it ? As interru_64.S applies to both 64s and 64e, I would have
> expected changes in exceptions_64e too.
As it stands the changes in interrupt_64.S cause non-volatiles to be
unconditionally restored. This may lead to
Le 19/08/2022 à 05:38, Rohan McLure a écrit :
> Zero GPRS r0, r2-r11, r14-r31, on entry into the kernel for all
> other interrupt sources to limit influence of user-space values
> in potential speculation gadgets. The remaining gprs are overwritten by
> entry macros to interrupt handlers,
Zero GPRS r0, r2-r11, r14-r31, on entry into the kernel for all
other interrupt sources to limit influence of user-space values
in potential speculation gadgets. The remaining gprs are overwritten by
entry macros to interrupt handlers, irrespective of whether or not a
given handler consumes these
