| /****************************************************************************** | |
| * sched.h | |
| * | |
| * Scheduler state interactions | |
| * | |
| * Copyright (c) 2005, Keir Fraser <keir@xensource.com> | |
| */ | |
| #ifndef __XEN_PUBLIC_SCHED_H__ | |
| #define __XEN_PUBLIC_SCHED_H__ | |
| #include "event_channel.h" | |
| /* | |
| * The prototype for this hypercall is: | |
| * long sched_op_new(int cmd, void *arg) | |
| * @cmd == SCHEDOP_??? (scheduler operation). | |
| * @arg == Operation-specific extra argument(s), as described below. | |
| * | |
| * **NOTE**: | |
| * Versions of Xen prior to 3.0.2 provide only the following legacy version | |
| * of this hypercall, supporting only the commands yield, block and shutdown: | |
| * long sched_op(int cmd, unsigned long arg) | |
| * @cmd == SCHEDOP_??? (scheduler operation). | |
| * @arg == 0 (SCHEDOP_yield and SCHEDOP_block) | |
| * == SHUTDOWN_* code (SCHEDOP_shutdown) | |
| */ | |
| /* | |
| * Voluntarily yield the CPU. | |
| * @arg == NULL. | |
| */ | |
| #define SCHEDOP_yield 0 | |
| /* | |
| * Block execution of this VCPU until an event is received for processing. | |
| * If called with event upcalls masked, this operation will atomically | |
| * reenable event delivery and check for pending events before blocking the | |
| * VCPU. This avoids a "wakeup waiting" race. | |
| * @arg == NULL. | |
| */ | |
| #define SCHEDOP_block 1 | |
| /* | |
| * Halt execution of this domain (all VCPUs) and notify the system controller. | |
| * @arg == pointer to sched_shutdown structure. | |
| */ | |
| #define SCHEDOP_shutdown 2 | |
| struct sched_shutdown { | |
| unsigned int reason; /* SHUTDOWN_* */ | |
| }; | |
| DEFINE_GUEST_HANDLE_STRUCT(sched_shutdown); | |
| /* | |
| * Poll a set of event-channel ports. Return when one or more are pending. An | |
| * optional timeout may be specified. | |
| * @arg == pointer to sched_poll structure. | |
| */ | |
| #define SCHEDOP_poll 3 | |
| struct sched_poll { | |
| GUEST_HANDLE(evtchn_port_t) ports; | |
| unsigned int nr_ports; | |
| uint64_t timeout; | |
| }; | |
| DEFINE_GUEST_HANDLE_STRUCT(sched_poll); | |
| /* | |
| * Reason codes for SCHEDOP_shutdown. These may be interpreted by control | |
| * software to determine the appropriate action. For the most part, Xen does | |
| * not care about the shutdown code. | |
| */ | |
| #define SHUTDOWN_poweroff 0 /* Domain exited normally. Clean up and kill. */ | |
| #define SHUTDOWN_reboot 1 /* Clean up, kill, and then restart. */ | |
| #define SHUTDOWN_suspend 2 /* Clean up, save suspend info, kill. */ | |
| #define SHUTDOWN_crash 3 /* Tell controller we've crashed. */ | |
| #endif /* __XEN_PUBLIC_SCHED_H__ */ |