| Power Management |
| ================ |
| |
| See :ref:`power-mgt-devtree` for device tree structure describing power management facilities. |
| |
| Debugging |
| --------- |
| |
| There exist a few debug knobs that can be set via nvram settings. These are |
| **not** ABI and may be changed or removed at *any* time. |
| |
| Disabling specific stop states |
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
| On boot, specific stop states can be disabled via setting a mask. For example, |
| to disable all but stop 0,1,2, use ~0xE0000000. :: |
| |
| nvram -p ibm,skiboot --update-config opal-stop-state-disable-mask=0x1FFFFFFF |
