This is a note to let you know that I've just added the patch titled
powerpc/mm: Fixup wrong LPCR_VRMASD value
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-mm-fixup-wrong-lpcr_vrmasd-value.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4ab2537c4204b976e4ca350bbdc193b4649cad28 Mon Sep 17 00:00:00 2001
From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Date: Thu, 8 Dec 2016 09:12:13 +0530
Subject: powerpc/mm: Fixup wrong LPCR_VRMASD value
From: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
commit 4ab2537c4204b976e4ca350bbdc193b4649cad28 upstream.
In commit a4b349540a26af ("powerpc/mm: Cleanup LPCR defines") we updated
LPCR_VRMASD wrongly as below.
-#define LPCR_VRMASD (0x1ful << (63-16))
+#define LPCR_VRMASD_SH 47
+#define LPCR_VRMASD (ASM_CONST(1) << LPCR_VRMASD_SH)
We initialize the VRMA bits in LPCR to 0x00 in kvm. Hence using a
different mask value as above while updating lpcr should not have any
impact.
This patch updates it to the correct value.
Fixes: a4b349540a26 ("powerpc/mm: Cleanup LPCR defines")
Reported-by: Ram Pai <linuxram@xxxxxxxxxx>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Jia He <hejianet@xxxxxxxxx>
Acked-by: Paul Mackerras <paulus@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/include/asm/reg.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -337,7 +337,7 @@
#define LPCR_DPFD_SH 52
#define LPCR_DPFD (ASM_CONST(7) << LPCR_DPFD_SH)
#define LPCR_VRMASD_SH 47
-#define LPCR_VRMASD (ASM_CONST(1) << LPCR_VRMASD_SH)
+#define LPCR_VRMASD (ASM_CONST(0x1f) << LPCR_VRMASD_SH)
#define LPCR_VRMA_L ASM_CONST(0x0008000000000000)
#define LPCR_VRMA_LP0 ASM_CONST(0x0001000000000000)
#define LPCR_VRMA_LP1 ASM_CONST(0x0000800000000000)
Patches currently in stable-queue which might be from aneesh.kumar@xxxxxxxxxxxxxxxxxx are
queue-4.9/powerpc-mm-fixup-wrong-lpcr_vrmasd-value.patch