mirror of
https://github.com/torvalds/linux.git
synced 2025-11-04 02:30:34 +02:00
066d6c7f4e
While the hypervisor change adding SCHEDOP_watchdog support included a daemon to make use of the new functionality, having a kernel driver for /dev/watchdog so that user space code doesn't need to distinguish non-Xen and Xen seems to be preferable. Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/******************************************************************************
|
|
* 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);
|
|
|
|
/*
|
|
* Declare a shutdown for another domain. The main use of this function is
|
|
* in interpreting shutdown requests and reasons for fully-virtualized
|
|
* domains. A para-virtualized domain may use SCHEDOP_shutdown directly.
|
|
* @arg == pointer to sched_remote_shutdown structure.
|
|
*/
|
|
#define SCHEDOP_remote_shutdown 4
|
|
struct sched_remote_shutdown {
|
|
domid_t domain_id; /* Remote domain ID */
|
|
unsigned int reason; /* SHUTDOWN_xxx reason */
|
|
};
|
|
|
|
/*
|
|
* Latch a shutdown code, so that when the domain later shuts down it
|
|
* reports this code to the control tools.
|
|
* @arg == as for SCHEDOP_shutdown.
|
|
*/
|
|
#define SCHEDOP_shutdown_code 5
|
|
|
|
/*
|
|
* Setup, poke and destroy a domain watchdog timer.
|
|
* @arg == pointer to sched_watchdog structure.
|
|
* With id == 0, setup a domain watchdog timer to cause domain shutdown
|
|
* after timeout, returns watchdog id.
|
|
* With id != 0 and timeout == 0, destroy domain watchdog timer.
|
|
* With id != 0 and timeout != 0, poke watchdog timer and set new timeout.
|
|
*/
|
|
#define SCHEDOP_watchdog 6
|
|
struct sched_watchdog {
|
|
uint32_t id; /* watchdog ID */
|
|
uint32_t timeout; /* timeout */
|
|
};
|
|
|
|
/*
|
|
* 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. */
|
|
#define SHUTDOWN_watchdog 4 /* Restart because watchdog time expired. */
|
|
|
|
#endif /* __XEN_PUBLIC_SCHED_H__ */
|