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(parent: fbcee2e) | patch
powerpc/syscall: implement system call entry/exit logic in C for PPC32
authorChristophe Leroy <christophe.leroy@csgroup.eu>
Mon, 8 Feb 2021 15:10:33 +0000 (15:10 +0000)
committerMichael Ellerman <mpe@ellerman.id.au>
Thu, 11 Feb 2021 12:35:11 +0000 (23:35 +1100)
commit6f76a01173ccaa363739f913394d4e138d92d718
tree95a1a11050edc174079c6ac160adb1baa5674b98tree | snapshot
parentfbcee2ebe8edbb6a93316f0a189ae7fcfaa7094fcommit | diff
powerpc/syscall: implement system call entry/exit logic in C for PPC32

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
arch/powerpc/kernel/entry_32.S diff | blob | history
arch/powerpc/kernel/head_32.h diff | blob | history
arch/powerpc/kernel/head_booke.h diff | blob | history
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