[PATCH] arm64: mm: support instruction SETEND
From: Leo Yan
Date: Wed Jan 07 2015 - 00:52:34 EST
Currently kernel has set the bit SCTLR_EL1.SED, so the SETEND
instruction will be treated as UNALLOCATED; this error can be
reproduced when ARMv8 cpu runs with EL1/aarch64 and EL0/aarch32
mode, finally kernel will trap the exception if the userspace
libs use SETEND instruction.
So this patch clears bit SCTLR_EL1.SED to support SETEND instruction.
Signed-off-by: Leo Yan <leo.yan@xxxxxxxxxx>
Signed-off-by: Xiaolong Ye <yexl@xxxxxxxxxxx>
---
arch/arm64/mm/proc.S | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index 4e778b1..66a7363 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -249,9 +249,9 @@ ENDPROC(__cpu_setup)
* CE0 XWHW CZ ME TEEA S
* .... .IEE .... NEAI TE.I ..AD DEN0 ACAM
* 0011 0... 1101 ..0. ..0. 10.. .... .... < hardware reserved
- * .... .1.. .... 01.1 11.1 ..01 0001 1101 < software settings
+ * .... .1.. .... 01.1 11.1 ..00 0001 1101 < software settings
*/
.type crval, #object
crval:
- .word 0x000802e2 // clear
- .word 0x0405d11d // set
+ .word 0x000803e2 // clear
+ .word 0x0405d01d // set
--
1.9.1
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