powerpc/64s: Convert slb_miss_common to use RFI_TO_USER/KERNEL

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commit c7305645eb upstream.

In the SLB miss handler we may be returning to user or kernel. We need
to add a check early on and save the result in the cr4 register, and
then we bifurcate the return path based on that.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Nicholas Piggin 2018-01-10 03:07:15 +11:00 • committed by Greg Kroah-Hartman

parent bcac5d3653

commit 9488c6b916

1 changed files with 28 additions and 1 deletions

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

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