[PATCH] powerpc: paste - Mask XERSO bit in CR
From: Haren Myneni <hidden>
Date: 2018-04-26 06:48:51
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
NX can set 3rd bit in CR register for XER[SO] (Summation overflow)
which is not used for paste return value. So. mask this bit to get
proper return status.
Signed-off-by: Haren Myneni <haren@us.ibm.com>
diff --git a/arch/powerpc/platforms/powernv/copy-paste.h b/arch/powerpc/platforms/powernv/copy-paste.h
index c9a5036..82392e3 100644
--- a/arch/powerpc/platforms/powernv/copy-paste.h
+++ b/arch/powerpc/platforms/powernv/copy-paste.h@@ -9,7 +9,8 @@ #include <asm/ppc-opcode.h> #define CR0_SHIFT 28 -#define CR0_MASK 0xF +#define CR0_MASK 0xE /* 3rd bit undefined or set for XER[SO] */ + /* * Copy/paste instructions: *