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(parent: bdf4e01) | patch
powerpc/64s/exception: avoid SPR RAW scoreboard stall in real mode entry
authorNicholas Piggin <npiggin@gmail.com>
Fri, 28 Jun 2019 05:33:21 +0000 (15:33 +1000)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 2 Jul 2019 11:39:48 +0000 (21:39 +1000)
commitae47177a6630bb8869bcec04240d9dc3024872b4
treed96eecbe758ecd71a643174b26e09e0293b0abb8tree | snapshot
parentbdf4e01bea47826a585ca3b4a7dd807674d3de5acommit | diff
powerpc/64s/exception: avoid SPR RAW scoreboard stall in real mode entry

Move SPR reads ahead of writes. Real mode entry that is not a KVM
guest is rare these days, but bad practice propagates.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
arch/powerpc/kernel/exceptions-64s.S diff | blob | history
Linux Kernel Source Tree.