Git rev: dc743744d8e3a9caef577aeab6b7f51bc08ded17 The qemuppc uses ppc7400 as the default tune file (meta/conf/machine/qemuppc.conf) in 1.5. But in yocot-bsp tool, it still use the tune-ppc603e (scripts/lib/bsp/substrate/target/arch/qemu/conf/machine/{{=machine}}.conf). This issue is similar with bug 6482.
http://git.yoctoproject.org/cgit.cgi/poky/commit/?h=dora&id=2490a020db187c802cb0d12619318af618a54554