FreeBSD/Linux Kernel Cross Reference
sys/xen/hypervisor.h
1 /******************************************************************************
2 * hypervisor.h
3 *
4 * Linux-specific hypervisor handling.
5 *
6 * Copyright (c) 2002, K A Fraser
7 *
8 * $FreeBSD$
9 */
10
11 #ifndef __XEN_HYPERVISOR_H__
12 #define __XEN_HYPERVISOR_H__
13
14 #ifdef XENHVM
15
16 #define is_running_on_xen() (HYPERVISOR_shared_info != NULL)
17
18 #else
19
20 #define is_running_on_xen() 1
21
22 #endif
23
24 #ifdef PAE
25 #ifndef CONFIG_X86_PAE
26 #define CONFIG_X86_PAE
27 #endif
28 #endif
29
30 #include <sys/cdefs.h>
31 #include <sys/systm.h>
32 #include <xen/interface/xen.h>
33 #include <xen/interface/platform.h>
34 #include <xen/interface/event_channel.h>
35 #include <xen/interface/physdev.h>
36 #include <xen/interface/sched.h>
37 #include <xen/interface/callback.h>
38 #include <xen/interface/memory.h>
39 #include <machine/xen/hypercall.h>
40
41 #if defined(__amd64__)
42 #define MULTI_UVMFLAGS_INDEX 2
43 #define MULTI_UVMDOMID_INDEX 3
44 #else
45 #define MULTI_UVMFLAGS_INDEX 3
46 #define MULTI_UVMDOMID_INDEX 4
47 #endif
48
49 #ifdef CONFIG_XEN_PRIVILEGED_GUEST
50 #define is_initial_xendomain() (xen_start_info->flags & SIF_INITDOMAIN)
51 #else
52 #define is_initial_xendomain() 0
53 #endif
54
55 extern start_info_t *xen_start_info;
56
57 extern uint64_t get_system_time(int ticks);
58
59 static inline int
60 HYPERVISOR_console_write(char *str, int count)
61 {
62 return HYPERVISOR_console_io(CONSOLEIO_write, count, str);
63 }
64
65 static inline void HYPERVISOR_crash(void) __dead2;
66
67 static inline int
68 HYPERVISOR_yield(void)
69 {
70 int rc = HYPERVISOR_sched_op(SCHEDOP_yield, NULL);
71
72 #if CONFIG_XEN_COMPAT <= 0x030002
73 if (rc == -ENOXENSYS)
74 rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
75 #endif
76 return (rc);
77 }
78
79 static inline int
80 HYPERVISOR_block(
81 void)
82 {
83 int rc = HYPERVISOR_sched_op(SCHEDOP_block, NULL);
84
85 #if CONFIG_XEN_COMPAT <= 0x030002
86 if (rc == -ENOXENSYS)
87 rc = HYPERVISOR_sched_op_compat(SCHEDOP_block, 0);
88 #endif
89 return (rc);
90 }
91
92
93 static inline void
94 HYPERVISOR_shutdown(unsigned int reason)
95 {
96 struct sched_shutdown sched_shutdown = {
97 .reason = reason
98 };
99
100 HYPERVISOR_sched_op(SCHEDOP_shutdown, &sched_shutdown);
101 #if CONFIG_XEN_COMPAT <= 0x030002
102 HYPERVISOR_sched_op_compat(SCHEDOP_shutdown, reason);
103 #endif
104 }
105
106 static inline void
107 HYPERVISOR_crash(void)
108 {
109 HYPERVISOR_shutdown(SHUTDOWN_crash);
110 /* NEVER REACHED */
111 for (;;) ; /* eliminate noreturn error */
112 }
113
114 /* Transfer control to hypervisor until an event is detected on one */
115 /* of the specified ports or the specified number of ticks elapse */
116 static inline int
117 HYPERVISOR_poll(
118 evtchn_port_t *ports, unsigned int nr_ports, int ticks)
119 {
120 int rc;
121 struct sched_poll sched_poll = {
122 .nr_ports = nr_ports,
123 .timeout = get_system_time(ticks)
124 };
125 set_xen_guest_handle(sched_poll.ports, ports);
126
127 rc = HYPERVISOR_sched_op(SCHEDOP_poll, &sched_poll);
128 #if CONFIG_XEN_COMPAT <= 0x030002
129 if (rc == -ENOXENSYS)
130 rc = HYPERVISOR_sched_op_compat(SCHEDOP_yield, 0);
131 #endif
132 return (rc);
133 }
134
135 static inline void
136 MULTI_update_va_mapping(
137 multicall_entry_t *mcl, unsigned long va,
138 uint64_t new_val, unsigned long flags)
139 {
140 mcl->op = __HYPERVISOR_update_va_mapping;
141 mcl->args[0] = va;
142 #if defined(__amd64__)
143 mcl->args[1] = new_val;
144 #elif defined(PAE)
145 mcl->args[1] = (uint32_t)(new_val & 0xffffffff) ;
146 mcl->args[2] = (uint32_t)(new_val >> 32);
147 #else
148 mcl->args[1] = new_val;
149 mcl->args[2] = 0;
150 #endif
151 mcl->args[MULTI_UVMFLAGS_INDEX] = flags;
152 }
153
154 #endif /* __XEN_HYPERVISOR_H__ */
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