[PATCH 5.19 092/717] powerpc/boot: Explicitly disable usage of SPE instructions

Greg Kroah-Hartman
2022-10-22T07:48:18Z

From: Pali Rohár <pali@kernel.org>

commit 110a58b9f91c66f743c01a2c217243d94c899c23 upstream.

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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/powerpc/boot/Makefile | 1 +
1 file changed, 1 insertion(+)

--- 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)