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powerpc: Enable Little Endian Alignment Handler for Float Pair Instructions

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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: Tom Musta <tmusta@gmail.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Tom Musta
2013-10-18 12:08:22 -05:00
committed by Benjamin Herrenschmidt
parent 075f6311af
commit 630c8a5fc9
1 changed files with 0 additions and 6 deletions
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6
arch/powerpc/kernel/align.c
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@@ -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, * Only POWER6 has these instructions, and it does true little-endian,
* so we don't need the address swizzling. * so we don't need the address swizzling.
*/ */
#ifdef __BIG_ENDIAN__
static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg, static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg,
unsigned int flags) unsigned int flags)
{ {
@@ -406,7 +405,6 @@ static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg,
return -EFAULT; return -EFAULT;
return 1; /* exception handled and fixed up */ return 1; /* exception handled and fixed up */
} }
#endif
#ifdef CONFIG_SPE #ifdef CONFIG_SPE
@@ -918,12 +916,8 @@ int fix_alignment(struct pt_regs *regs)
/* Special case for 16-byte FP loads and stores */ /* Special case for 16-byte FP loads and stores */
if (nb == 16) { if (nb == 16) {
#ifdef __BIG_ENDIAN__
PPC_WARN_ALIGNMENT(fp_pair, regs); PPC_WARN_ALIGNMENT(fp_pair, regs);
return emulate_fp_pair(addr, reg, flags); return emulate_fp_pair(addr, reg, flags);
#else
return -EFAULT;
#endif
} }
PPC_WARN_ALIGNMENT(unaligned, regs); PPC_WARN_ALIGNMENT(unaligned, regs);