[OE-core] [oe-core][PATCH] tune-ppce500mc.inc: pass -mcpu=e500mc for ppce500mc kernel compile

[Zhenhua Luo]

Currently the -mcpu parameter is not passed to cross gcc when assembling
kernel .S file, the implicit -mcpu option that defaults to the latest
server cpu might casuse incorrect assembling.

A existent case is that wait instruction of ppce500mc is incorrectly assembled
to power9 version with default -mcpu setting, accordingly kernel boot calltrace
happend when wait instruction is executed on ppce500mc targets.

Signed-off-by: Zhenhua Luo <zhenhua.luo at nxp.com>
---
 meta/conf/machine/include/tune-ppce500mc.inc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/meta/conf/machine/include/tune-ppce500mc.inc b/meta/conf/machine/include/tune-ppce500mc.inc
index a1ca9be..bc26a0f 100644
--- a/meta/conf/machine/include/tune-ppce500mc.inc
+++ b/meta/conf/machine/include/tune-ppce500mc.inc
@@ -12,3 +12,6 @@ PACKAGE_EXTRA_ARCHS_tune-ppce500mc = "${PACKAGE_EXTRA_ARCHS_tune-powerpc} ppce50
 
 # glibc configure options to get e500mc specific library (for sqrt)
 GLIBC_EXTRA_OECONF += "${@bb.utils.contains('TUNE_FEATURES', 'ppce500mc', '-with-cpu=e500mc', '', d)}"
+
+# pass -mcpu=e500mc for ppce500mc kernel cross compile
+TARGET_CC_KERNEL_ARCH = "-mcpu=e500mc"
-- 
2.4.11