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| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-03-12 12:50:13 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-03-29 13:22:03 +1100 |
| commit | fcd4b43c36c69aa41e79a511edbb06c7020a6061 (patch) | |
| tree | b74de45120716ff2a6e5dfe6ee25ce02df1f2074 /arch/powerpc/kernel/entry_32.S | |
| parent | powerpc/40x: Change CRITICAL_EXCEPTION_PROLOG macro to a gas macro (diff) | |
| download | linux-dev-fcd4b43c36c69aa41e79a511edbb06c7020a6061.tar.xz linux-dev-fcd4b43c36c69aa41e79a511edbb06c7020a6061.zip | |
powerpc/40x: Save SRR0/SRR1 and r10/r11 earlier in critical exception
In order to be able to switch MMU on in exception prolog, save
SRR0 and SRR1 earlier.
Also save r10 and r11 into stack earlier to better match with the
normal exception prolog.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/79a93f253d72dc97ac968c9c62b5066960b688ed.1615552866.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'arch/powerpc/kernel/entry_32.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_32.S | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 78c430b7f9d9..8528b4c7f9d3 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -107,15 +107,6 @@ _ASM_NOKPROBE_SYMBOL(crit_transfer_to_handler) #ifdef CONFIG_40x .globl crit_transfer_to_handler crit_transfer_to_handler: - lwz r0,crit_r10@l(0) - stw r0,GPR10(r11) - lwz r0,crit_r11@l(0) - stw r0,GPR11(r11) - mfspr r0,SPRN_SRR0 - stw r0,crit_srr0@l(0) - mfspr r0,SPRN_SRR1 - stw r0,crit_srr1@l(0) - /* set the stack limit to the current stack */ mfspr r8,SPRN_SPRG_THREAD lwz r0,KSP_LIMIT(r8) |