diff options
| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-03-12 12:50:47 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-03-29 13:22:10 +1100 |
| commit | b5efec00b671c5d7e9cb9e73a1d4925dd6ce8dcd (patch) | |
| tree | 99a5ab07a508cab6ee4943fd8b8d689b7c7c8e1a /arch/powerpc/kernel/interrupt.c | |
| parent | a2b3e09ae41c71d27d9b8da9baf31e0d9a97b864 (diff) | |
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/interrupt.c')
| -rw-r--r-- | arch/powerpc/kernel/interrupt.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interrupt.c index 6875b82f613a..20ace874cd98 100644 --- a/arch/powerpc/kernel/interrupt.c +++ b/arch/powerpc/kernel/interrupt.c @@ -33,6 +33,8 @@ notrace long system_call_exception(long r3, long r4, long r5, { syscall_fn f; + kuep_lock(); + regs->orig_gpr3 = r3; if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG)) @@ -354,6 +356,8 @@ again: */ kuap_user_restore(regs); #endif + kuep_unlock(); + return ret; } |