Re: [PATCH v4 13/20] powerpc: Provide syscall wrapper

2022-09-12 Thread Nicholas Piggin
On Wed Aug 24, 2022 at 12:05 PM AEST, Rohan McLure wrote: > Implement syscall wrapper as per s390, x86, arm64. When enabled > cause handlers to accept parameters from a stack frame rather than > from user scratch register state. This allows for user registers to be > safely cleared in order to redu

[PATCH v4 13/20] powerpc: Provide syscall wrapper

2022-08-23 Thread Rohan McLure
Implement syscall wrapper as per s390, x86, arm64. When enabled cause handlers to accept parameters from a stack frame rather than from user scratch register state. This allows for user registers to be safely cleared in order to reduce caller influence on speculation within syscall routine. The wra