Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 4.16 076/272] powerpc/64s/idle: Fix restore of AMOR on POWER9 after deep sleep | Date | Mon, 28 May 2018 12:01:49 +0200 |
| |
4.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Nicholas Piggin <npiggin@gmail.com>
[ Upstream commit c1b25a17d24925b0961c319cfc3fd7e1dc778914 ]
POWER8 restores AMOR when waking from deep sleep, but POWER9 does not, because it does not go through the subcore restore.
Have POWER9 restore it in core restore.
Fixes: ee97b6b99f42 ("powerpc/mm/radix: Setup AMOR in HV mode to allow key 0") Signed-off-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Sasha Levin <alexander.levin@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- arch/powerpc/kernel/idle_book3s.S | 2 ++ 1 file changed, 2 insertions(+)
--- a/arch/powerpc/kernel/idle_book3s.S +++ b/arch/powerpc/kernel/idle_book3s.S @@ -834,6 +834,8 @@ BEGIN_FTR_SECTION mtspr SPRN_PTCR,r4 ld r4,_RPR(r1) mtspr SPRN_RPR,r4 + ld r4,_AMOR(r1) + mtspr SPRN_AMOR,r4 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) ld r4,_TSCR(r1)
| |