void cpu_die(void)
{
if (ppc_md.cpu_die)
ppc_md.cpu_die();
/* If we return, we re-enter start_secondary */
start_secondary_resume();
}
static void pseries_mach_cpu_die(void)
{
unsigned int cpu = smp_processor_id();
unsigned int hwcpu = hard_smp_processor_id();
u8 cede_latency_hint = 0;
local_irq_disable();
idle_task_exit();
if (xive_enabled())
xive_teardown_cpu();
else
xics_teardown_cpu();
if (get_preferred_offline_state(cpu) == CPU_STATE_INACTIVE) {
set_cpu_current_state(cpu, CPU_STATE_INACTIVE);
if (ppc_md.suspend_disable_cpu)
ppc_md.suspend_disable_cpu();
cede_latency_hint = 2;
get_lppaca()->idle = 1;
if (!lppaca_shared_proc(get_lppaca()))
get_lppaca()->donate_dedicated_cpu = 1;
while (get_preferred_offline_state(cpu) == CPU_STATE_INACTIVE) {
while (!prep_irq_for_idle()) {
local_irq_enable();
local_irq_disable();
}
extended_cede_processor(cede_latency_hint);
}
local_irq_disable();
if (!lppaca_shared_proc(get_lppaca()))
get_lppaca()->donate_dedicated_cpu = 0;
get_lppaca()->idle = 0;
if (get_preferred_offline_state(cpu) == CPU_STATE_ONLINE) {
unregister_slb_shadow(hwcpu);
hard_irq_disable();
/*
* Call to start_secondary_resume() will not return.
* Kernel stack will be reset and start_secondary()
* will be called to continue the online operation.
*/
start_secondary_resume();
}
}
/* Requested state is CPU_STATE_OFFLINE at this point */
WARN_ON(get_preferred_offline_state(cpu) != CPU_STATE_OFFLINE);
set_cpu_current_state(cpu, CPU_STATE_OFFLINE);
unregister_slb_shadow(hwcpu);
rtas_stop_self();
/* Should never get here... */
BUG();
for(;;);
}