panic_idle
extern void panic_idle(void);
panic_idle();
xc_priority(0, 0, 0, CPUSET2BV(xcset), (xc_func_t)panic_idle);
xt_some(cps, (xcfunc_t *)idle_stop_xcall, (uint64_t)&panic_idle, 0);
xt_some(cps, (xcfunc_t *)idle_stop_xcall, (uint64_t)&panic_idle, 0);