The patch titled
Subject: selftests: vm: pkeys: fix powerpc access right updates
has been added to the -mm tree. Its filename is
selftests-vm-pkeys-introduce-powerpc-support-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/selftests-vm-pkeys-introduce-powerpc-support-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/selftests-vm-pkeys-introduce-powerpc-support-fix.patch
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------------------------------------------------------
From: Sandipan Das <sandipan@xxxxxxxxxxxxx>
Subject: selftests: vm: pkeys: fix powerpc access right updates
The Power ISA mandates that all writes to the Authority Mask Register
(AMR) must always be preceded as well as succeeded by a
context-synchronizing instruction. This applies to both the privileged
and unprivileged variants of the Move To AMR instruction.
Link: http://lkml.kernel.org/r/5f65cf37be993760de8112a88da194e3ccbb2bf8.1588959697.git.sandipan@xxxxxxxxxxxxx
Fixes: 130f573c2a79 ("selftests/vm/pkeys: introduce powerpc support")
Signed-off-by: Sandipan Das <sandipan@xxxxxxxxxxxxx>
Reported-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Suggested-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Florian Weimer <fweimer@xxxxxxxxxx>
Cc: "Desnes A. Nunes do Rosario" <desnesn@xxxxxxxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Michal Suchanek <msuchanek@xxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/vm/pkey-powerpc.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/tools/testing/selftests/vm/pkey-powerpc.h~selftests-vm-pkeys-introduce-powerpc-support-fix
+++ a/tools/testing/selftests/vm/pkey-powerpc.h
@@ -54,7 +54,8 @@ static inline void __write_pkey_reg(u64
dprintf4("%s() changing %016llx to %016llx\n",
__func__, __read_pkey_reg(), pkey_reg);
- asm volatile("mtspr 0xd, %0" : : "r" ((unsigned long)(amr)) : "memory");
+ asm volatile("isync; mtspr 0xd, %0; isync"
+ : : "r" ((unsigned long)(amr)) : "memory");
dprintf4("%s() pkey register after changing %016llx to %016llx\n",
__func__, __read_pkey_reg(), pkey_reg);
_
Patches currently in -mm which might be from sandipan@xxxxxxxxxxxxx are
mm-reset-numa-stats-for-boot-pagesets.patch
selftests-vm-pkeys-use-sane-types-for-pkey-register.patch
selftests-vm-pkeys-add-helpers-for-pkey-bits.patch
selftests-vm-pkeys-use-the-correct-huge-page-size.patch
selftests-vm-pkeys-introduce-powerpc-support-fix.patch
selftests-vm-pkeys-override-access-right-definitions-on-powerpc-fix.patch
selftests-vm-pkeys-use-the-correct-page-size-on-powerpc.patch
selftests-vm-pkeys-fix-multilib-builds-for-x86.patch
