On Fri, 2017-09-22 at 03:32:21 UTC, Michael Neuling wrote: > On POWER9 DD2.1 and below, it's possible for a paste instruction to > cause a Machine Check Exception (MCE) where only DSISR bit 33 is > set. This will result in the MCE handler seeing an unknown event, > which triggers linux to crash. > > We change this by detecting unknown events caused by load/stores in > the MCE handler and marking them as handled so that we no longer > crash. > > An MCE that occurs like this is spurious, so we don't need to do > anything in terms of servicing it. If there is something that needs to > be serviced, the CPU will raise the MCE again with the correct DSISR > so that it can be serviced properly. > > Signed-off-by: Michael Neuling <mi...@neuling.org> > Reviewed-by: Nicholas Piggin <npig...@gmail.com > Acked-by: Balbir SIngh <bsinghar...@gmail.com>
Applied to powerpc fixes, thanks. https://git.kernel.org/powerpc/c/d8bd9f3f0925d22726de159531bfe3 cheers
