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    Subject[PATCH 5.15 068/530] powerpc/boot: Explicitly disable usage of SPE instructions
    Date
    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)


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