powerpc/syscall: implement system call entry/exit logic in C for PPC32

Browse source

That's port of PPC64 syscall entry/exit logic in C to PPC32.

Performancewise on 8xx:
Before : 304 cycles on null_syscall
After  : 348 cycles on null_syscall

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/a93b08e1275e9d1f0b1c39043d1b827586b2b401.1612796617.git.christophe.leroy@csgroup.eu

...

This commit is contained in:

Christophe Leroy 2021-02-08 15:10:33 +00:00 • committed by Michael Ellerman

parent fbcee2ebe8

commit 6f76a01173

3 changed files with 30 additions and 229 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

224

arch/powerpc/kernel/entry_32.S

View file

18

arch/powerpc/kernel/head_32.h

View file

17

arch/powerpc/kernel/head_booke.h

View file