On Fri, Aug 21, 2015 at 01:05:12PM +0800, Xiao Guangrong wrote: > These instructions are used by NVDIMM drivers and the specification > locates at: > https://software.intel.com/sites/default/files/managed/0d/53/319433-022.pdf > > Let them be enabled on Broadwell on default > > Signed-off-by: Xiao Guangrong <guangrong.xiao@xxxxxxxxxxxxxxx> This breaks the ABI. If you change a CPU model you need machine compat code (see the TYPE_X86_CPU entries in PC_COMPAT_2_3 for example). And you can only change the CPU model in a new machine-type if that doesn't affect the runnability of a VM. In other words: If: -machine pc-i440fx-2.4 -cpu <model>,enforcec is runnable in a given host, then -machine pc-i440fx-2.5 -cpu <model>,enforce should be runnable too. -- Eduardo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
