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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-03-12 13:50:47 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-03-29 04:22:10 +0200 |
| commit | b5efec00b671c5d7e9cb9e73a1d4925dd6ce8dcd (patch) | |
| tree | 99a5ab07a508cab6ee4943fd8b8d689b7c7c8e1a /arch/powerpc/kernel/head_booke.h | |
| parent | powerpc/32: Only use prepare_transfer_to_handler function on book3s/32 and e500 (diff) | |
| download | linux-b5efec00b671c5d7e9cb9e73a1d4925dd6ce8dcd.tar.xz linux-b5efec00b671c5d7e9cb9e73a1d4925dd6ce8dcd.zip | |
powerpc/32s: Move KUEP locking/unlocking in C
This can be done in C, do it.
Unrolling the loop gains approx. 15% performance.
From now on, prepare_transfer_to_handler() is only for
interrupts from kernel.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/4eadd873927e9a73c3d1dfe2f9497353465514cf.1615552867.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/kernel/head_booke.h')
| -rw-r--r-- | arch/powerpc/kernel/head_booke.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h index cb96ae002af6..f82470091697 100644 --- a/arch/powerpc/kernel/head_booke.h +++ b/arch/powerpc/kernel/head_booke.h @@ -105,7 +105,10 @@ END_BTB_FLUSH_SECTION .macro prepare_transfer_to_handler #ifdef CONFIG_E500 + andi. r12,r9,MSR_PR + bne 777f bl prepare_transfer_to_handler +777: #endif .endm |