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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-04-30 12:39:03 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-05-03 01:20:27 +1000 |
| commit | 1a4b739bbb4f8857d1b4feb46d6b3ec72269c111 (patch) | |
| tree | 1e2212d55c675e3fefcfd9e5049695a5bcbdfd2e /mm/Kconfig | |
| parent | b86fb88855ea7881314b935df1df6b1ef1bd0c32 (diff) | |
| download | linux-1a4b739bbb4f8857d1b4feb46d6b3ec72269c111.tar.bz2 | |
powerpc/32: implement fast entry for syscalls on BOOKE
This patch implements a fast entry for syscalls.
Syscalls don't have to preserve non volatile registers except LR.
This patch then implement a fast entry for syscalls, where
volatile registers get clobbered.
As this entry is dedicated to syscall it always sets MSR_EE
and warns in case MSR_EE was previously off
It also assumes that the call is always from user, system calls are
unexpected from kernel.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'mm/Kconfig')
0 files changed, 0 insertions, 0 deletions