Commit e156bd8a authored Sep 23, 2013 by Anton Blanchard Committed by Benjamin Herrenschmidt Oct 11, 2013

powerpc: Fix offset of FPRs in VSX registers in little endian builds



The FPRs overlap the high doublewords of the first 32 VSX registers.
Fix TS_FPROFFSET and TS_VSRLOWOFFSET so we access the correct fields
in little endian mode.

If VSX is disabled the FPRs are only one doubleword in length so
TS_FPROFFSET needs adjusting in little endian.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

parent 12f04f2b

arch/powerpc/include/asm/processor.h

+10 −2

Original line number	Diff line number	Diff line
		@@ -14,8 +14,18 @@

		#ifdef CONFIG_VSX
		#define TS_FPRWIDTH 2

		#ifdef __BIG_ENDIAN__
		#define TS_FPROFFSET 0
		#define TS_VSRLOWOFFSET 1
		#else
		#define TS_FPROFFSET 1
		#define TS_VSRLOWOFFSET 0
		#endif

		#else
		#define TS_FPRWIDTH 1
		#define TS_FPROFFSET 0
		#endif

		#ifdef CONFIG_PPC64
		@@ -142,8 +152,6 @@ typedef struct {
		unsigned long seg;
		} mm_segment_t;

		#define TS_FPROFFSET 0
		#define TS_VSRLOWOFFSET 1
		#define TS_FPR(i) fpr[i][TS_FPROFFSET]
		#define TS_TRANS_FPR(i) transact_fpr[i][TS_FPROFFSET]