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    Subject[PATCH 4.17 057/220] powerpc/e500mc: Set assembler machine type to e500mc
    Date
    4.17-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Michael Jeanson <mjeanson@efficios.com>

    commit 69a8405999aa1c489de4b8d349468f0c2b83f093 upstream.

    In binutils 2.26 a new opcode for the "wait" instruction was added for the
    POWER9 and has precedence over the one specific to the e500mc. Commit
    ebf714ff3756 ("powerpc/e500mc: Add support for the wait instruction in
    e500_idle") uses this instruction specifically on the e500mc to work around
    an erratum.

    This results in an invalid instruction in idle_e500 when we build for the
    e500mc on bintutils >= 2.26 with the default assembler machine type.

    Since multiplatform between e500 and non-e500 is not supported, set the
    assembler machine type globaly when CONFIG_PPC_E500MC=y.

    Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
    Reviewed-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
    CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    CC: Paul Mackerras <paulus@samba.org>
    CC: Michael Ellerman <mpe@ellerman.id.au>
    CC: Kumar Gala <galak@kernel.crashing.org>
    CC: Vakul Garg <vakul.garg@nxp.com>
    CC: Scott Wood <swood@redhat.com>
    CC: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
    CC: linuxppc-dev@lists.ozlabs.org
    CC: linux-kernel@vger.kernel.org
    CC: stable@vger.kernel.org
    Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/powerpc/Makefile | 1 +
    1 file changed, 1 insertion(+)

    --- a/arch/powerpc/Makefile
    +++ b/arch/powerpc/Makefile
    @@ -251,6 +251,7 @@ cpu-as-$(CONFIG_4xx) += -Wa,-m405
    cpu-as-$(CONFIG_ALTIVEC) += $(call as-option,-Wa$(comma)-maltivec)
    cpu-as-$(CONFIG_E200) += -Wa,-me200
    cpu-as-$(CONFIG_PPC_BOOK3S_64) += -Wa,-mpower4
    +cpu-as-$(CONFIG_PPC_E500MC) += $(call as-option,-Wa$(comma)-me500mc)

    KBUILD_AFLAGS += $(cpu-as-y)
    KBUILD_CFLAGS += $(cpu-as-y)

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