* [PATCH 4.17 057/220] powerpc/e500mc: Set assembler machine type to e500mc
[not found] <20180701160908.272447118@linuxfoundation.org>
@ 2018-07-01 16:21 ` Greg Kroah-Hartman
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From: Greg Kroah-Hartman @ 2018-07-01 16:21 UTC (permalink / raw)
To: linux-kernel
Cc: Greg Kroah-Hartman, stable, Michael Jeanson, Mathieu Desnoyers,
Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman,
Kumar Gala, Vakul Garg, Scott Wood, linuxppc-dev
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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