win-pvdrivers

view common/include/public/sched.h @ 146:b474e898b409

patches to change 'long' types in the headers to something that is the same as sizeof(void *) under i386 and amd64 architectures
author James Harper <james.harper@bendigoit.com.au>
date Wed Jan 23 13:01:20 2008 +1100 (2008-01-23)
parents 5712dede5a1b
children
line source
1 /******************************************************************************
2 * sched.h
3 *
4 * Scheduler state interactions
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to
8 * deal in the Software without restriction, including without limitation the
9 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
10 * sell copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
23 *
24 * Copyright (c) 2005, Keir Fraser <keir@xensource.com>
25 */
27 #ifndef __XEN_PUBLIC_SCHED_H__
28 #define __XEN_PUBLIC_SCHED_H__
30 #include "event_channel.h"
32 /*
33 * The prototype for this hypercall is:
34 * long sched_op(int cmd, void *arg)
35 * @cmd == SCHEDOP_??? (scheduler operation).
36 * @arg == Operation-specific extra argument(s), as described below.
37 *
38 * Versions of Xen prior to 3.0.2 provided only the following legacy version
39 * of this hypercall, supporting only the commands yield, block and shutdown:
40 * long sched_op(int cmd, xen_ulong_t arg)
41 * @cmd == SCHEDOP_??? (scheduler operation).
42 * @arg == 0 (SCHEDOP_yield and SCHEDOP_block)
43 * == SHUTDOWN_* code (SCHEDOP_shutdown)
44 * This legacy version is available to new guests as sched_op_compat().
45 */
47 /*
48 * Voluntarily yield the CPU.
49 * @arg == NULL.
50 */
51 #define SCHEDOP_yield 0
53 /*
54 * Block execution of this VCPU until an event is received for processing.
55 * If called with event upcalls masked, this operation will atomically
56 * reenable event delivery and check for pending events before blocking the
57 * VCPU. This avoids a "wakeup waiting" race.
58 * @arg == NULL.
59 */
60 #define SCHEDOP_block 1
62 /*
63 * Halt execution of this domain (all VCPUs) and notify the system controller.
64 * @arg == pointer to sched_shutdown structure.
65 */
66 #define SCHEDOP_shutdown 2
67 struct sched_shutdown {
68 unsigned int reason; /* SHUTDOWN_* */
69 };
70 typedef struct sched_shutdown sched_shutdown_t;
71 DEFINE_XEN_GUEST_HANDLE(sched_shutdown_t);
73 /*
74 * Poll a set of event-channel ports. Return when one or more are pending. An
75 * optional timeout may be specified.
76 * @arg == pointer to sched_poll structure.
77 */
78 #define SCHEDOP_poll 3
79 struct sched_poll {
80 XEN_GUEST_HANDLE(evtchn_port_t) ports;
81 unsigned int nr_ports;
82 uint64_t timeout;
83 };
84 typedef struct sched_poll sched_poll_t;
85 DEFINE_XEN_GUEST_HANDLE(sched_poll_t);
87 /*
88 * Declare a shutdown for another domain. The main use of this function is
89 * in interpreting shutdown requests and reasons for fully-virtualized
90 * domains. A para-virtualized domain may use SCHEDOP_shutdown directly.
91 * @arg == pointer to sched_remote_shutdown structure.
92 */
93 #define SCHEDOP_remote_shutdown 4
94 struct sched_remote_shutdown {
95 domid_t domain_id; /* Remote domain ID */
96 unsigned int reason; /* SHUTDOWN_xxx reason */
97 };
98 typedef struct sched_remote_shutdown sched_remote_shutdown_t;
99 DEFINE_XEN_GUEST_HANDLE(sched_remote_shutdown_t);
101 /*
102 * Reason codes for SCHEDOP_shutdown. These may be interpreted by control
103 * software to determine the appropriate action. For the most part, Xen does
104 * not care about the shutdown code.
105 */
106 #define SHUTDOWN_poweroff 0 /* Domain exited normally. Clean up and kill. */
107 #define SHUTDOWN_reboot 1 /* Clean up, kill, and then restart. */
108 #define SHUTDOWN_suspend 2 /* Clean up, save suspend info, kill. */
109 #define SHUTDOWN_crash 3 /* Tell controller we've crashed. */
111 #endif /* __XEN_PUBLIC_SCHED_H__ */
113 /*
114 * Local variables:
115 * mode: C
116 * c-set-style: "BSD"
117 * c-basic-offset: 4
118 * tab-width: 4
119 * indent-tabs-mode: nil
120 * End:
121 */