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