diff options
| author | Nicholas Piggin <npiggin@gmail.com> | 2020-04-29 16:56:54 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-05-28 23:24:37 +1000 |
| commit | d4539074b0e9c5fa6508e8c33aaf51abc8ff6e91 (patch) | |
| tree | 4f5914349c6615225839c54d5b37fff58f75a96d /arch/powerpc/kernel/entry_64.S | |
| parent | 579940bb451c2dd33396d2d56ce6ef5d92154b3b (diff) | |
| download | linux-d4539074b0e9c5fa6508e8c33aaf51abc8ff6e91.tar.gz | |
powerpc/64s/kuap: Conditionally restore AMR in kuap_restore_amr asm
Similar to the C code change, make the AMR restore conditional on
whether the register has changed.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200429065654.1677541-7-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index b3c9f15089b64c..9d49338e0c8593 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -479,11 +479,11 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) fast_interrupt_return: _ASM_NOKPROBE_SYMBOL(fast_interrupt_return) kuap_check_amr r3, r4 - ld r4,_MSR(r1) - andi. r0,r4,MSR_PR + ld r5,_MSR(r1) + andi. r0,r5,MSR_PR bne .Lfast_user_interrupt_return - kuap_restore_amr r3 - andi. r0,r4,MSR_RI + kuap_restore_amr r3, r4 + andi. r0,r5,MSR_RI li r3,0 /* 0 return value, no EMULATE_STACK_STORE */ bne+ .Lfast_kernel_interrupt_return addi r3,r1,STACK_FRAME_OVERHEAD |