powerpc/64s/exception: simplify hmi control flow

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Branch to the relocated 0xc000 address early (still in real mode), to
simplify subsequent branches. Have the virt mode handler avoid just
'windup' and redo the exception from scratch, rather than branching
back to the trampoline.

Rearrange the stack setup instruction location to match the system
reset handler (e.g., right before EXCEPTION_PROLOG_COMMON).

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Nicholas Piggin 2019-06-28 16:33:22 +10:00 • committed by Michael Ellerman

parent f34c9675ca

commit 293c2e27b9

1 changed files with 10 additions and 16 deletions

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arch/powerpc/kernel/exceptions-64s.S

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