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mirror_ubuntu-kernels/arch/powerpc/kernel/syscalls
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Christophe Leroy fbcee2ebe8 powerpc/32: Always save non volatile GPRs at syscall entry 
In preparation for porting syscall entry/exit to C, inconditionally
save non volatile general purpose registers.

Commit 965dd3ad30 ("powerpc/64/syscall: Remove non-volatile GPR save
optimisation") provides detailed explanation.

This increases the number of cycles by 24 cycles on 8xx with
null_syscall benchmark (280 => 304 cycles)

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/21c08162b83655195fe9ead78ff2cfd28508d023.1612796617.git.christophe.leroy@csgroup.eu
2021-02-11 23:35:11 +11:00
..
Makefile powerpc: add system call table generation support 2018-12-21 14:46:50 +11:00
syscall.tbl powerpc/32: Always save non volatile GPRs at syscall entry 2021-02-11 23:35:11 +11:00
syscallhdr.sh asm-generic: fix unistd_32.h generation format 2020-04-07 10:43:42 -07:00
syscalltbl.sh powerpc: remove nargs from __SYSCALL 2019-03-02 14:43:05 +11:00