intercepted by hypervisor and presented to acpi fixed hw emulator acpi interrupt handler events relating to platform sleep state transitions will typically be multiplexed to and from domu not all events arise out of interrupts even though many or most do this approach allows for deferment of actual transitions especially platform sleep state transitions wherever necessary or desirable it also allows for making notifications to other domains about imminent or incipient transitions so that timely and appropriate action may be taken in response moreover facilitated are surrogated substituted or fabricated acpi enable disable operations for domu management of virtualized acpi timer s for domu management of acpi status control and event registers and the like in particular in an embodiment irq9 events from the acpi irq9 handler may be routed to dom0 with high level notifications and dispatched as gsi s to other doms especially a single domu by the acpi event notifier such as that provided in phoenix u00ae hypercore u2122 still referring to fig4 at step 430 a database or array or set of tables of virtualized fhf especially ffh codes is maintained responsive to the information as described in regards to steps 410 and 420 above this action may be performed in the dom0.