static bool __xen_has_pv_device(int state)
{
/* HVM domains might or might not */
if (xen_hvm_domain() && (xen_platform_pci_unplug & state))
return true;
return xen_has_pv_devices();
}
static int __init xen_tpmfront_init(void)
{
if (!xen_domain())
return -ENODEV;
if (!xen_has_pv_devices())
return -ENODEV;
return xenbus_register_frontend(&tpmfront_driver);
}
static int __init xenkbd_init(void)
{
if (!xen_domain())
return -ENODEV;
/* Nothing to do if running in dom0. */
if (xen_initial_domain())
return -ENODEV;
if (!xen_has_pv_devices())
return -ENODEV;
return xenbus_register_frontend(&xenkbd_driver);
}
/**
* Initializes the OpenXT input module.
*/
static int __init oxtkbd_init(void)
{
//If we're not on Xen, we definitely don't apply.
if (!xen_domain())
return -ENODEV;
//For now, there's no sense in running this from dom0,
//as it has direct access to the keyboard. This may change,
//depending on disaggregation specifics.
if (xen_initial_domain())
return -ENODEV;
//If we can't use the XenBus, fail out.
if (!xen_has_pv_devices())
return -ENODEV;
//Otheriwse, register our driver!
return xenbus_register_frontend(&oxtkbd_driver);
}