ppc: Fix migration of the XER register
env->xer only holds the lower bits of the XER register nowadays, the SO, OV and CA bits are stored in separate variables (see the function cpu_write_xer() for details). Since the migration code currently only reads the "xer" variable, the upper bits are lost during migration. Fix it by using cpu_read_xer() instead. Signed-off-by: NThomas Huth <thuth@redhat.com> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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