hw/i386/vmport: Assert vmport initialized before registering commands
[qemu.git] / hw / xen / xen-common.c
1 /*
2 * Copyright (C) 2014 Citrix Systems UK Ltd.
3 *
4 * This work is licensed under the terms of the GNU GPL, version 2. See
5 * the COPYING file in the top-level directory.
6 *
7 * Contributions after 2012-01-13 are licensed under the terms of the
8 * GNU GPL, version 2 or (at your option) any later version.
9 */
10
11 #include "qemu/osdep.h"
12 #include "qemu/error-report.h"
13 #include "qemu/module.h"
14 #include "qapi/error.h"
15 #include "hw/xen/xen-legacy-backend.h"
16 #include "hw/xen/xen_pt.h"
17 #include "chardev/char.h"
18 #include "sysemu/accel.h"
19 #include "sysemu/runstate.h"
20 #include "migration/misc.h"
21 #include "migration/global_state.h"
22 #include "hw/boards.h"
23
24 //#define DEBUG_XEN
25
26 #ifdef DEBUG_XEN
27 #define DPRINTF(fmt, ...) \
28 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
29 #else
30 #define DPRINTF(fmt, ...) \
31 do { } while (0)
32 #endif
33
34 xc_interface *xen_xc;
35 xenforeignmemory_handle *xen_fmem;
36 xendevicemodel_handle *xen_dmod;
37
38 static int store_dev_info(int domid, Chardev *cs, const char *string)
39 {
40 struct xs_handle *xs = NULL;
41 char *path = NULL;
42 char *newpath = NULL;
43 char *pts = NULL;
44 int ret = -1;
45
46 /* Only continue if we're talking to a pty. */
47 if (!CHARDEV_IS_PTY(cs)) {
48 return 0;
49 }
50 pts = cs->filename + 4;
51
52 /* We now have everything we need to set the xenstore entry. */
53 xs = xs_open(0);
54 if (xs == NULL) {
55 fprintf(stderr, "Could not contact XenStore\n");
56 goto out;
57 }
58
59 path = xs_get_domain_path(xs, domid);
60 if (path == NULL) {
61 fprintf(stderr, "xs_get_domain_path() error\n");
62 goto out;
63 }
64 newpath = realloc(path, (strlen(path) + strlen(string) +
65 strlen("/tty") + 1));
66 if (newpath == NULL) {
67 fprintf(stderr, "realloc error\n");
68 goto out;
69 }
70 path = newpath;
71
72 strcat(path, string);
73 strcat(path, "/tty");
74 if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
75 fprintf(stderr, "xs_write for '%s' fail", string);
76 goto out;
77 }
78 ret = 0;
79
80 out:
81 free(path);
82 xs_close(xs);
83
84 return ret;
85 }
86
87 void xenstore_store_pv_console_info(int i, Chardev *chr)
88 {
89 if (i == 0) {
90 store_dev_info(xen_domid, chr, "/console");
91 } else {
92 char buf[32];
93 snprintf(buf, sizeof(buf), "/device/console/%d", i);
94 store_dev_info(xen_domid, chr, buf);
95 }
96 }
97
98
99 static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
100 {
101 char path[50];
102
103 if (xs == NULL) {
104 error_report("xenstore connection not initialized");
105 exit(1);
106 }
107
108 snprintf(path, sizeof (path), "device-model/%u/state", xen_domid);
109 /*
110 * This call may fail when running restricted so don't make it fatal in
111 * that case. Toolstacks should instead use QMP to listen for state changes.
112 */
113 if (!xs_write(xs, XBT_NULL, path, state, strlen(state)) &&
114 !xen_domid_restrict) {
115 error_report("error recording dm state");
116 exit(1);
117 }
118 }
119
120
121 static void xen_change_state_handler(void *opaque, int running,
122 RunState state)
123 {
124 if (running) {
125 /* record state running */
126 xenstore_record_dm_state(xenstore, "running");
127 }
128 }
129
130 static bool xen_get_igd_gfx_passthru(Object *obj, Error **errp)
131 {
132 return has_igd_gfx_passthru;
133 }
134
135 static void xen_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
136 {
137 has_igd_gfx_passthru = value;
138 }
139
140 static void xen_setup_post(MachineState *ms, AccelState *accel)
141 {
142 int rc;
143
144 if (xen_domid_restrict) {
145 rc = xen_restrict(xen_domid);
146 if (rc < 0) {
147 perror("xen: failed to restrict");
148 exit(1);
149 }
150 }
151 }
152
153 static int xen_init(MachineState *ms)
154 {
155 MachineClass *mc = MACHINE_GET_CLASS(ms);
156
157 xen_xc = xc_interface_open(0, 0, 0);
158 if (xen_xc == NULL) {
159 xen_pv_printf(NULL, 0, "can't open xen interface\n");
160 return -1;
161 }
162 xen_fmem = xenforeignmemory_open(0, 0);
163 if (xen_fmem == NULL) {
164 xen_pv_printf(NULL, 0, "can't open xen fmem interface\n");
165 xc_interface_close(xen_xc);
166 return -1;
167 }
168 xen_dmod = xendevicemodel_open(0, 0);
169 if (xen_dmod == NULL) {
170 xen_pv_printf(NULL, 0, "can't open xen devicemodel interface\n");
171 xenforeignmemory_close(xen_fmem);
172 xc_interface_close(xen_xc);
173 return -1;
174 }
175 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
176 /*
177 * opt out of system RAM being allocated by generic code
178 */
179 mc->default_ram_id = NULL;
180 return 0;
181 }
182
183 static void xen_accel_class_init(ObjectClass *oc, void *data)
184 {
185 AccelClass *ac = ACCEL_CLASS(oc);
186 static GlobalProperty compat[] = {
187 { "migration", "store-global-state", "off" },
188 { "migration", "send-configuration", "off" },
189 { "migration", "send-section-footer", "off" },
190 };
191
192 ac->name = "Xen";
193 ac->init_machine = xen_init;
194 ac->setup_post = xen_setup_post;
195 ac->allowed = &xen_allowed;
196 ac->compat_props = g_ptr_array_new();
197
198 compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat));
199
200 object_class_property_add_bool(oc, "igd-passthru",
201 xen_get_igd_gfx_passthru, xen_set_igd_gfx_passthru);
202 object_class_property_set_description(oc, "igd-passthru",
203 "Set on/off to enable/disable igd passthrou");
204 }
205
206 #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
207
208 static const TypeInfo xen_accel_type = {
209 .name = TYPE_XEN_ACCEL,
210 .parent = TYPE_ACCEL,
211 .class_init = xen_accel_class_init,
212 };
213
214 static void xen_type_init(void)
215 {
216 type_register_static(&xen_accel_type);
217 }
218
219 type_init(xen_type_init);