[POWERPC] Add cpu feature for SPE handling

Make it so that SPE support can be determined at runtime.  This is similiar
to how we handle AltiVec.  This allows us to have SPE support built in and
work on processors with and without SPE.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 4074c0b31453..21d889e63e87 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -504,9 +504,11 @@ BEGIN_FTR_SECTION
 END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
 #endif /* CONFIG_ALTIVEC */
 #ifdef CONFIG_SPE
+BEGIN_FTR_SECTION
         oris    r0,r0,MSR_SPE@h  /* Disable SPE */
         mfspr   r12,SPRN_SPEFSCR /* save spefscr register value */
         stw     r12,THREAD+THREAD_SPEFSCR(r2)
+END_FTR_SECTION_IFSET(CPU_FTR_SPE)
 #endif /* CONFIG_SPE */
         and.    r0,r0,r11       /* FP or altivec or SPE enabled? */
         beq+    1f
@@ -542,8 +544,10 @@ BEGIN_FTR_SECTION
 END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
 #endif /* CONFIG_ALTIVEC */
 #ifdef CONFIG_SPE
+BEGIN_FTR_SECTION
         lwz     r0,THREAD+THREAD_SPEFSCR(r2)
         mtspr   SPRN_SPEFSCR,r0         /* restore SPEFSCR reg */
+END_FTR_SECTION_IFSET(CPU_FTR_SPE)
 #endif /* CONFIG_SPE */
 
         lwz     r0,_CCR(r1)