Re: [1/2] powerpc/64s/hash: do not use PPC_INVALIDATE_ERAT on CPUs before POWER9
From: Michael Ellerman <hidden>
Date: 2018-10-15 04:08:45
On Mon, 2018-08-27 at 03:03:01 UTC, Nicholas Piggin wrote:
PPC_INVALIDATE_ERAT is slbia IH=7 which is a new variant introduced
with POWER9, and the result is undefined on earlier CPUs.
Commits 7b9f71f974 ("powerpc/64s: POWER9 machine check handler") and
d4748276ae ("powerpc/64s: Improve local TLB flush for boot and MCE on
POWER9") caused POWER7/8 code to use this instruction. Remove it. An
ERAT flush can be made by invalidatig the SLB, but before POWER9 that
requires a flush and rebolt.
Fixes: 7b9f71f974 ("powerpc/64s: POWER9 machine check handler")
Fixes: d4748276ae ("powerpc/64s: Improve local TLB flush for boot and
MCE on POWER9")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>Series applied to powerpc next, thanks. https://git.kernel.org/powerpc/c/bc276ecba132caccb1fda5863a652c cheers