powerpc/kvm: Fix the build for 32-bit Book 3S (classic) processors

Commits a5d4f3ad3a ("powerpc: Base support for exceptions using
HSRR0/1") and 673b189a2e ("powerpc: Always use SPRN_SPRG_HSCRATCH0
when running in HV mode") cause compile and link errors for 32-bit
classic Book 3S processors when KVM is enabled.  This fixes these
errors.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index fdec59333053..c5cae0dd176c 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -824,6 +824,11 @@
         FTR_SECTION_ELSE_NESTED(66);                    \
         mtspr   SPRN_SPRG_HSCRATCH0,rX;                 \
         ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_HVMODE_206, 66)
+
+#else /* CONFIG_PPC_BOOK3S_64 */
+#define GET_SCRATCH0(rX)        mfspr   rX,SPRN_SPRG_SCRATCH0
+#define SET_SCRATCH0(rX)        mtspr   SPRN_SPRG_SCRATCH0,rX
+
 #endif
 
 #ifdef CONFIG_PPC_BOOK3E_64