powerpc/boot: Explicitly disable usage of SPE instructions

uImage boot wrapper should not use SPE instructions, like kernel itself.
Boot wrapper has already disabled Altivec and VSX instructions but not SPE.
Options -mno-spe and -mspe=no already set when compilation of kernel, but
not when compiling uImage wrapper yet. Fix it.

Cc: stable@vger.kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220827134454.17365-1-pali@kernel.org

diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index a9cd2ea4a8617dd86d74a1d32b2715ab89386a5e..d32d95aea5d6f4c3e14d79f0e36923c332776078 100644 (file)
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -34,6 +34,7 @@ endif
 
 BOOTCFLAGS    := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
                 -fno-strict-aliasing -O2 -msoft-float -mno-altivec -mno-vsx \
+                $(call cc-option,-mno-spe) $(call cc-option,-mspe=no) \
                 -pipe -fomit-frame-pointer -fno-builtin -fPIC -nostdinc \
                 $(LINUXINCLUDE)