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04b0de0e WL |
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 | ||
21cbfe5f | 11 | #include "qemu/osdep.h" |
021746c1 | 12 | #include "hw/i386/pc.h" |
04b0de0e WL |
13 | #include "hw/xen/xen_backend.h" |
14 | #include "qmp-commands.h" | |
15 | #include "sysemu/char.h" | |
b152b05a | 16 | #include "sysemu/accel.h" |
8c6dc68f | 17 | #include "migration/migration.h" |
04b0de0e WL |
18 | |
19 | //#define DEBUG_XEN | |
20 | ||
21 | #ifdef DEBUG_XEN | |
22 | #define DPRINTF(fmt, ...) \ | |
23 | do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0) | |
24 | #else | |
25 | #define DPRINTF(fmt, ...) \ | |
26 | do { } while (0) | |
27 | #endif | |
28 | ||
29 | static int store_dev_info(int domid, CharDriverState *cs, const char *string) | |
30 | { | |
31 | struct xs_handle *xs = NULL; | |
32 | char *path = NULL; | |
33 | char *newpath = NULL; | |
34 | char *pts = NULL; | |
35 | int ret = -1; | |
36 | ||
37 | /* Only continue if we're talking to a pty. */ | |
38 | if (strncmp(cs->filename, "pty:", 4)) { | |
39 | return 0; | |
40 | } | |
41 | pts = cs->filename + 4; | |
42 | ||
43 | /* We now have everything we need to set the xenstore entry. */ | |
44 | xs = xs_open(0); | |
45 | if (xs == NULL) { | |
46 | fprintf(stderr, "Could not contact XenStore\n"); | |
47 | goto out; | |
48 | } | |
49 | ||
50 | path = xs_get_domain_path(xs, domid); | |
51 | if (path == NULL) { | |
52 | fprintf(stderr, "xs_get_domain_path() error\n"); | |
53 | goto out; | |
54 | } | |
55 | newpath = realloc(path, (strlen(path) + strlen(string) + | |
56 | strlen("/tty") + 1)); | |
57 | if (newpath == NULL) { | |
58 | fprintf(stderr, "realloc error\n"); | |
59 | goto out; | |
60 | } | |
61 | path = newpath; | |
62 | ||
63 | strcat(path, string); | |
64 | strcat(path, "/tty"); | |
65 | if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) { | |
66 | fprintf(stderr, "xs_write for '%s' fail", string); | |
67 | goto out; | |
68 | } | |
69 | ret = 0; | |
70 | ||
71 | out: | |
72 | free(path); | |
73 | xs_close(xs); | |
74 | ||
75 | return ret; | |
76 | } | |
77 | ||
78 | void xenstore_store_pv_console_info(int i, CharDriverState *chr) | |
79 | { | |
80 | if (i == 0) { | |
81 | store_dev_info(xen_domid, chr, "/console"); | |
82 | } else { | |
83 | char buf[32]; | |
84 | snprintf(buf, sizeof(buf), "/device/console/%d", i); | |
85 | store_dev_info(xen_domid, chr, buf); | |
86 | } | |
87 | } | |
88 | ||
89 | ||
90 | static void xenstore_record_dm_state(struct xs_handle *xs, const char *state) | |
91 | { | |
92 | char path[50]; | |
93 | ||
94 | if (xs == NULL) { | |
95 | fprintf(stderr, "xenstore connection not initialized\n"); | |
96 | exit(1); | |
97 | } | |
98 | ||
99 | snprintf(path, sizeof (path), "device-model/%u/state", xen_domid); | |
100 | if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) { | |
101 | fprintf(stderr, "error recording dm state\n"); | |
102 | exit(1); | |
103 | } | |
104 | } | |
105 | ||
106 | ||
107 | static void xen_change_state_handler(void *opaque, int running, | |
108 | RunState state) | |
109 | { | |
110 | if (running) { | |
111 | /* record state running */ | |
112 | xenstore_record_dm_state(xenstore, "running"); | |
113 | } | |
114 | } | |
115 | ||
f6a1ef64 | 116 | static int xen_init(MachineState *ms) |
04b0de0e | 117 | { |
021746c1 WL |
118 | PCMachineState *pcms = PC_MACHINE(ms); |
119 | ||
120 | /* Disable ACPI build because Xen handles it */ | |
121 | pcms->acpi_build_enabled = false; | |
122 | ||
81daba58 IC |
123 | xen_xc = xc_interface_open(0, 0, 0); |
124 | if (xen_xc == NULL) { | |
96c77dba | 125 | xen_pv_printf(NULL, 0, "can't open xen interface\n"); |
04b0de0e WL |
126 | return -1; |
127 | } | |
e0cb42ae IC |
128 | xen_fmem = xenforeignmemory_open(0, 0); |
129 | if (xen_fmem == NULL) { | |
96c77dba | 130 | xen_pv_printf(NULL, 0, "can't open xen fmem interface\n"); |
e0cb42ae IC |
131 | xc_interface_close(xen_xc); |
132 | return -1; | |
133 | } | |
04b0de0e WL |
134 | qemu_add_vm_change_state_handler(xen_change_state_handler, NULL); |
135 | ||
8c6dc68f AP |
136 | global_state_set_optional(); |
137 | savevm_skip_configuration(); | |
138 | savevm_skip_section_footers(); | |
139 | ||
04b0de0e WL |
140 | return 0; |
141 | } | |
142 | ||
b152b05a EH |
143 | static void xen_accel_class_init(ObjectClass *oc, void *data) |
144 | { | |
145 | AccelClass *ac = ACCEL_CLASS(oc); | |
146 | ac->name = "Xen"; | |
0d15da8e | 147 | ac->init_machine = xen_init; |
b152b05a EH |
148 | ac->allowed = &xen_allowed; |
149 | } | |
150 | ||
151 | #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen") | |
152 | ||
153 | static const TypeInfo xen_accel_type = { | |
154 | .name = TYPE_XEN_ACCEL, | |
155 | .parent = TYPE_ACCEL, | |
156 | .class_init = xen_accel_class_init, | |
157 | }; | |
158 | ||
159 | static void xen_type_init(void) | |
160 | { | |
161 | type_register_static(&xen_accel_type); | |
162 | } | |
163 | ||
164 | type_init(xen_type_init); |