hw/i386/vmport: Assert vmport initialized before registering commands
[qemu.git] / accel / xen / xen-all.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/xen.h"
20 #include "sysemu/runstate.h"
21 #include "migration/misc.h"
22 #include "migration/global_state.h"
23 #include "hw/boards.h"
24
25 //#define DEBUG_XEN
26
27 #ifdef DEBUG_XEN
28 #define DPRINTF(fmt, ...) \
29 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
30 #else
31 #define DPRINTF(fmt, ...) \
32 do { } while (0)
33 #endif
34
35 static bool xen_allowed;
36
37 bool xen_enabled(void)
38 {
39 return xen_allowed;
40 }
41
42 xc_interface *xen_xc;
43 xenforeignmemory_handle *xen_fmem;
44 xendevicemodel_handle *xen_dmod;
45
46 static int store_dev_info(int domid, Chardev *cs, const char *string)
47 {
48 struct xs_handle *xs = NULL;
49 char *path = NULL;
50 char *newpath = NULL;
51 char *pts = NULL;
52 int ret = -1;
53
54 /* Only continue if we're talking to a pty. */
55 if (!CHARDEV_IS_PTY(cs)) {
56 return 0;
57 }
58 pts = cs->filename + 4;
59
60 /* We now have everything we need to set the xenstore entry. */
61 xs = xs_open(0);
62 if (xs == NULL) {
63 fprintf(stderr, "Could not contact XenStore\n");
64 goto out;
65 }
66
67 path = xs_get_domain_path(xs, domid);
68 if (path == NULL) {
69 fprintf(stderr, "xs_get_domain_path() error\n");
70 goto out;
71 }
72 newpath = realloc(path, (strlen(path) + strlen(string) +
73 strlen("/tty") + 1));
74 if (newpath == NULL) {
75 fprintf(stderr, "realloc error\n");
76 goto out;
77 }
78 path = newpath;
79
80 strcat(path, string);
81 strcat(path, "/tty");
82 if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
83 fprintf(stderr, "xs_write for '%s' fail", string);
84 goto out;
85 }
86 ret = 0;
87
88 out:
89 free(path);
90 xs_close(xs);
91
92 return ret;
93 }
94
95 void xenstore_store_pv_console_info(int i, Chardev *chr)
96 {
97 if (i == 0) {
98 store_dev_info(xen_domid, chr, "/console");
99 } else {
100 char buf[32];
101 snprintf(buf, sizeof(buf), "/device/console/%d", i);
102 store_dev_info(xen_domid, chr, buf);
103 }
104 }
105
106
107 static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
108 {
109 char path[50];
110
111 if (xs == NULL) {
112 error_report("xenstore connection not initialized");
113 exit(1);
114 }
115
116 snprintf(path, sizeof (path), "device-model/%u/state", xen_domid);
117 /*
118 * This call may fail when running restricted so don't make it fatal in
119 * that case. Toolstacks should instead use QMP to listen for state changes.
120 */
121 if (!xs_write(xs, XBT_NULL, path, state, strlen(state)) &&
122 !xen_domid_restrict) {
123 error_report("error recording dm state");
124 exit(1);
125 }
126 }
127
128
129 static void xen_change_state_handler(void *opaque, int running,
130 RunState state)
131 {
132 if (running) {
133 /* record state running */
134 xenstore_record_dm_state(xenstore, "running");
135 }
136 }
137
138 static bool xen_get_igd_gfx_passthru(Object *obj, Error **errp)
139 {
140 return has_igd_gfx_passthru;
141 }
142
143 static void xen_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
144 {
145 has_igd_gfx_passthru = value;
146 }
147
148 static void xen_setup_post(MachineState *ms, AccelState *accel)
149 {
150 int rc;
151
152 if (xen_domid_restrict) {
153 rc = xen_restrict(xen_domid);
154 if (rc < 0) {
155 perror("xen: failed to restrict");
156 exit(1);
157 }
158 }
159 }
160
161 static int xen_init(MachineState *ms)
162 {
163 MachineClass *mc = MACHINE_GET_CLASS(ms);
164
165 xen_xc = xc_interface_open(0, 0, 0);
166 if (xen_xc == NULL) {
167 xen_pv_printf(NULL, 0, "can't open xen interface\n");
168 return -1;
169 }
170 xen_fmem = xenforeignmemory_open(0, 0);
171 if (xen_fmem == NULL) {
172 xen_pv_printf(NULL, 0, "can't open xen fmem interface\n");
173 xc_interface_close(xen_xc);
174 return -1;
175 }
176 xen_dmod = xendevicemodel_open(0, 0);
177 if (xen_dmod == NULL) {
178 xen_pv_printf(NULL, 0, "can't open xen devicemodel interface\n");
179 xenforeignmemory_close(xen_fmem);
180 xc_interface_close(xen_xc);
181 return -1;
182 }
183 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
184 /*
185 * opt out of system RAM being allocated by generic code
186 */
187 mc->default_ram_id = NULL;
188 return 0;
189 }
190
191 static void xen_accel_class_init(ObjectClass *oc, void *data)
192 {
193 AccelClass *ac = ACCEL_CLASS(oc);
194 static GlobalProperty compat[] = {
195 { "migration", "store-global-state", "off" },
196 { "migration", "send-configuration", "off" },
197 { "migration", "send-section-footer", "off" },
198 };
199
200 ac->name = "Xen";
201 ac->init_machine = xen_init;
202 ac->setup_post = xen_setup_post;
203 ac->allowed = &xen_allowed;
204 ac->compat_props = g_ptr_array_new();
205
206 compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat));
207
208 object_class_property_add_bool(oc, "igd-passthru",
209 xen_get_igd_gfx_passthru, xen_set_igd_gfx_passthru);
210 object_class_property_set_description(oc, "igd-passthru",
211 "Set on/off to enable/disable igd passthrou");
212 }
213
214 #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
215
216 static const TypeInfo xen_accel_type = {
217 .name = TYPE_XEN_ACCEL,
218 .parent = TYPE_ACCEL,
219 .class_init = xen_accel_class_init,
220 };
221
222 static void xen_type_init(void)
223 {
224 type_register_static(&xen_accel_type);
225 }
226
227 type_init(xen_type_init);