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powerpc/64s: Convert slb_miss_common to use RFI_TO_USER/KERNEL
authorNicholas Piggin <npiggin@gmail.com>
Tue, 9 Jan 2018 16:07:15 +0000 (03:07 +1100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Tue, 23 Jan 2018 18:58:10 +0000 (19:58 +0100)
commit9488c6b916535c7df2e99b8e3928faa5ff59b150
tree088178d06aad323e631ea266f12af2f0985dfae7tree | snapshot
parentbcac5d36538ff417429ed942aa0392a3c50a4783commit | diff
powerpc/64s: Convert slb_miss_common to use RFI_TO_USER/KERNEL

commit c7305645eb0c1621351cfc104038831ae87c0053 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>
arch/powerpc/kernel/exceptions-64s.S diff | blob | history
Domain: System / Kernel;