powerpc/32: move MSR_PR test into EXCEPTION_PROLOG_0

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In order to simplify  VMAP stack implementation, move
MSR_PR test into EXCEPTION_PROLOG_0.

This requires to not modify cr0 between EXCEPTION_PROLOG_0
and EXCEPTION_PROLOG_1.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/5c8b5bba692b92654dbd363a229a1ba91db725bb.1576916812.git.christophe.leroy@c-s.fr

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This commit is contained in:

Christophe Leroy 2019-12-21 08:32:25 +00:00 • committed by Michael Ellerman

parent 1ca9db5b65

commit 5ae8fabc64

2 changed files with 22 additions and 21 deletions

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4

arch/powerpc/kernel/head_32.h

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39

arch/powerpc/kernel/head_8xx.S

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