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powerpc/32: Tag DAR in EXCEPTION_PROLOG_2 for the 8xx
authorChristophe Leroy <christophe.leroy@csgroup.eu>
Fri, 12 Mar 2021 12:50:23 +0000 (12:50 +0000)
committerMichael Ellerman <mpe@ellerman.id.au>
Mon, 29 Mar 2021 02:22:05 +0000 (13:22 +1100)
commit5b1c9a0d7f3bcac591767fa1aad1323564673b26
tree216f5d26e98b08cf88cc5b4b915ba0ae925075bftree | snapshot
parent7aa8dd67f15731f659390018b5c9fd95f5975b3dcommit | diff
powerpc/32: Tag DAR in EXCEPTION_PROLOG_2 for the 8xx

8xx requires to tag the DAR with a magic value in order to
fixup DAR on faults generated by 'dcbX', as the 8xx
forgets to update the DAR for those faults.

Do the tagging as early as possible, that is before enabling MMU.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/853a2e28ca7c5fc85617037030f99fe6070c9536.1615552867.git.christophe.leroy@csgroup.eu
arch/powerpc/kernel/head_32.h diff | blob | history
arch/powerpc/kernel/head_8xx.S diff | blob | history
Domain: System / Kernel;