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_native.h"
16 #include "hw/xen/xen-legacy-backend.h"
17 #include "hw/xen/xen_pt.h"
18 #include "hw/xen/xen_igd.h"
19 #include "chardev/char.h"
20 #include "qemu/accel.h"
21 #include "system/accel-ops.h"
22 #include "system/cpus.h"
23 #include "system/xen.h"
24 #include "system/runstate.h"
25 #include "migration/misc.h"
26 #include "migration/global_state.h"
27 #include "hw/boards.h"
28
29 bool xen_allowed;
30
31 xc_interface *xen_xc;
32 xenforeignmemory_handle *xen_fmem;
33 xendevicemodel_handle *xen_dmod;
34
xenstore_record_dm_state(const char * state)35 static void xenstore_record_dm_state(const char *state)
36 {
37 char path[50];
38
39 snprintf(path, sizeof (path), "device-model/%u/state", xen_domid);
40 if (!qemu_xen_xs_write(xenstore, XBT_NULL, path, state, strlen(state))) {
41 error_report("error recording dm state");
42 exit(1);
43 }
44 }
45
46
xen_change_state_handler(void * opaque,bool running,RunState state)47 static void xen_change_state_handler(void *opaque, bool running,
48 RunState state)
49 {
50 if (running) {
51 /* record state running */
52 xenstore_record_dm_state("running");
53 }
54 }
55
xen_get_igd_gfx_passthru(Object * obj,Error ** errp)56 static bool xen_get_igd_gfx_passthru(Object *obj, Error **errp)
57 {
58 return xen_igd_gfx_pt_enabled();
59 }
60
xen_set_igd_gfx_passthru(Object * obj,bool value,Error ** errp)61 static void xen_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
62 {
63 xen_igd_gfx_pt_set(value, errp);
64 }
65
xen_setup_post(MachineState * ms,AccelState * accel)66 static void xen_setup_post(MachineState *ms, AccelState *accel)
67 {
68 int rc;
69
70 if (xen_domid_restrict) {
71 rc = xen_restrict(xen_domid);
72 if (rc < 0) {
73 perror("xen: failed to restrict");
74 exit(1);
75 }
76 }
77 }
78
xen_init(MachineState * ms)79 static int xen_init(MachineState *ms)
80 {
81 MachineClass *mc = MACHINE_GET_CLASS(ms);
82
83 xen_xc = xc_interface_open(0, 0, 0);
84 if (xen_xc == NULL) {
85 xen_pv_printf(NULL, 0, "can't open xen interface\n");
86 return -1;
87 }
88 xen_fmem = xenforeignmemory_open(0, 0);
89 if (xen_fmem == NULL) {
90 xen_pv_printf(NULL, 0, "can't open xen fmem interface\n");
91 xc_interface_close(xen_xc);
92 return -1;
93 }
94 xen_dmod = xendevicemodel_open(0, 0);
95 if (xen_dmod == NULL) {
96 xen_pv_printf(NULL, 0, "can't open xen devicemodel interface\n");
97 xenforeignmemory_close(xen_fmem);
98 xc_interface_close(xen_xc);
99 return -1;
100 }
101
102 /*
103 * The XenStore write would fail when running restricted so don't attempt
104 * it in that case. Toolstacks should instead use QMP to listen for state
105 * changes.
106 */
107 if (!xen_domid_restrict) {
108 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
109 }
110 /*
111 * opt out of system RAM being allocated by generic code
112 */
113 mc->default_ram_id = NULL;
114
115 xen_mode = XEN_ATTACH;
116 return 0;
117 }
118
xen_accel_class_init(ObjectClass * oc,const void * data)119 static void xen_accel_class_init(ObjectClass *oc, const void *data)
120 {
121 AccelClass *ac = ACCEL_CLASS(oc);
122 static GlobalProperty compat[] = {
123 { "migration", "store-global-state", "off" },
124 { "migration", "send-configuration", "off" },
125 { "migration", "send-section-footer", "off" },
126 };
127
128 ac->name = "Xen";
129 ac->init_machine = xen_init;
130 ac->setup_post = xen_setup_post;
131 ac->allowed = &xen_allowed;
132 ac->compat_props = g_ptr_array_new();
133
134 compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat));
135
136 object_class_property_add_bool(oc, "igd-passthru",
137 xen_get_igd_gfx_passthru, xen_set_igd_gfx_passthru);
138 object_class_property_set_description(oc, "igd-passthru",
139 "Set on/off to enable/disable igd passthrou");
140 }
141
142 #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
143
144 static const TypeInfo xen_accel_type = {
145 .name = TYPE_XEN_ACCEL,
146 .parent = TYPE_ACCEL,
147 .class_init = xen_accel_class_init,
148 };
149
xen_accel_ops_class_init(ObjectClass * oc,const void * data)150 static void xen_accel_ops_class_init(ObjectClass *oc, const void *data)
151 {
152 AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
153
154 ops->create_vcpu_thread = dummy_start_vcpu_thread;
155 }
156
157 static const TypeInfo xen_accel_ops_type = {
158 .name = ACCEL_OPS_NAME("xen"),
159
160 .parent = TYPE_ACCEL_OPS,
161 .class_init = xen_accel_ops_class_init,
162 .abstract = true,
163 };
164
xen_type_init(void)165 static void xen_type_init(void)
166 {
167 type_register_static(&xen_accel_type);
168 type_register_static(&xen_accel_ops_type);
169 }
170 type_init(xen_type_init);
171