Commit 630c8a5f authored by Tom Musta's avatar Tom Musta Committed by Benjamin Herrenschmidt
Browse files

powerpc: Enable Little Endian Alignment Handler for Float Pair Instructions 



This patch enables alignment handling for the load/store floating point
pair instructions (lfdp, lfdpx, stfdp, stfdpx).  The handler routine
is properly coded and only needs to be enabled.

Signed-off-by: default avatarTom Musta <tmusta@gmail.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 075f6311

arch/powerpc/kernel/align.c

+0 −6
Original line number Diff line number Diff line
@@ -378,7 +378,6 @@ static int emulate_multiple(struct pt_regs *regs, unsigned char __user *addr, 
 * Only POWER6 has these instructions, and it does true little-endian,

 * so we don't need the address swizzling.

 */

#ifdef __BIG_ENDIAN__

static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg,

			   unsigned int flags)

{
@@ -406,7 +405,6 @@ static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg, 
		return -EFAULT;

	return 1;	/* exception handled and fixed up */

}

#endif



#ifdef CONFIG_SPE
@@ -918,12 +916,8 @@ int fix_alignment(struct pt_regs *regs) 


	/* Special case for 16-byte FP loads and stores */

	if (nb == 16) {

#ifdef __BIG_ENDIAN__

		PPC_WARN_ALIGNMENT(fp_pair, regs);

		return emulate_fp_pair(addr, reg, flags);

#else

		return -EFAULT;

#endif

	}



	PPC_WARN_ALIGNMENT(unaligned, regs);