update seabios to 1.7.5.1 stable release
[qemu.git] / 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 "hw/xen/xen_backend.h"
12 #include "qmp-commands.h"
13 #include "sysemu/char.h"
14 #include "sysemu/accel.h"
15
16 //#define DEBUG_XEN
17
18 #ifdef DEBUG_XEN
19 #define DPRINTF(fmt, ...) \
20 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
21 #else
22 #define DPRINTF(fmt, ...) \
23 do { } while (0)
24 #endif
25
26 static int store_dev_info(int domid, CharDriverState *cs, const char *string)
27 {
28 struct xs_handle *xs = NULL;
29 char *path = NULL;
30 char *newpath = NULL;
31 char *pts = NULL;
32 int ret = -1;
33
34 /* Only continue if we're talking to a pty. */
35 if (strncmp(cs->filename, "pty:", 4)) {
36 return 0;
37 }
38 pts = cs->filename + 4;
39
40 /* We now have everything we need to set the xenstore entry. */
41 xs = xs_open(0);
42 if (xs == NULL) {
43 fprintf(stderr, "Could not contact XenStore\n");
44 goto out;
45 }
46
47 path = xs_get_domain_path(xs, domid);
48 if (path == NULL) {
49 fprintf(stderr, "xs_get_domain_path() error\n");
50 goto out;
51 }
52 newpath = realloc(path, (strlen(path) + strlen(string) +
53 strlen("/tty") + 1));
54 if (newpath == NULL) {
55 fprintf(stderr, "realloc error\n");
56 goto out;
57 }
58 path = newpath;
59
60 strcat(path, string);
61 strcat(path, "/tty");
62 if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
63 fprintf(stderr, "xs_write for '%s' fail", string);
64 goto out;
65 }
66 ret = 0;
67
68 out:
69 free(path);
70 xs_close(xs);
71
72 return ret;
73 }
74
75 void xenstore_store_pv_console_info(int i, CharDriverState *chr)
76 {
77 if (i == 0) {
78 store_dev_info(xen_domid, chr, "/console");
79 } else {
80 char buf[32];
81 snprintf(buf, sizeof(buf), "/device/console/%d", i);
82 store_dev_info(xen_domid, chr, buf);
83 }
84 }
85
86
87 static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
88 {
89 char path[50];
90
91 if (xs == NULL) {
92 fprintf(stderr, "xenstore connection not initialized\n");
93 exit(1);
94 }
95
96 snprintf(path, sizeof (path), "device-model/%u/state", xen_domid);
97 if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) {
98 fprintf(stderr, "error recording dm state\n");
99 exit(1);
100 }
101 }
102
103
104 static void xen_change_state_handler(void *opaque, int running,
105 RunState state)
106 {
107 if (running) {
108 /* record state running */
109 xenstore_record_dm_state(xenstore, "running");
110 }
111 }
112
113 static int xen_init(MachineState *ms)
114 {
115 xen_xc = xen_xc_interface_open(0, 0, 0);
116 if (xen_xc == XC_HANDLER_INITIAL_VALUE) {
117 xen_be_printf(NULL, 0, "can't open xen interface\n");
118 return -1;
119 }
120 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
121
122 return 0;
123 }
124
125 static void xen_accel_class_init(ObjectClass *oc, void *data)
126 {
127 AccelClass *ac = ACCEL_CLASS(oc);
128 ac->name = "Xen";
129 ac->init_machine = xen_init;
130 ac->allowed = &xen_allowed;
131 }
132
133 #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
134
135 static const TypeInfo xen_accel_type = {
136 .name = TYPE_XEN_ACCEL,
137 .parent = TYPE_ACCEL,
138 .class_init = xen_accel_class_init,
139 };
140
141 static void xen_type_init(void)
142 {
143 type_register_static(&xen_accel_type);
144 }
145
146 type_init(xen_type_init);