blob: bacf962841a54059bbebffcfca1f2a7fc56dad4d [file] [log] [blame]
Wei Liu04b0de02014-05-07 16:16:43 +00001/*
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
Peter Maydell21cbfe52016-01-26 18:17:06 +000011#include "qemu/osdep.h"
Wei Liu021746c2016-11-01 17:44:16 +000012#include "hw/i386/pc.h"
Wei Liu04b0de02014-05-07 16:16:43 +000013#include "hw/xen/xen_backend.h"
14#include "qmp-commands.h"
15#include "sysemu/char.h"
Eduardo Habkostb152b052014-09-26 17:45:25 -030016#include "sysemu/accel.h"
Anthony PERARD8c6dc682015-08-03 15:29:21 +010017#include "migration/migration.h"
Wei Liu04b0de02014-05-07 16:16:43 +000018
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
29static 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
71out:
72 free(path);
73 xs_close(xs);
74
75 return ret;
76}
77
78void 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
90static 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
107static 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
Eduardo Habkostf6a1ef62014-09-26 17:45:30 -0300116static int xen_init(MachineState *ms)
Wei Liu04b0de02014-05-07 16:16:43 +0000117{
Wei Liu021746c2016-11-01 17:44:16 +0000118 PCMachineState *pcms = PC_MACHINE(ms);
119
120 /* Disable ACPI build because Xen handles it */
121 pcms->acpi_build_enabled = false;
122
Ian Campbell81daba582016-02-10 11:07:03 +0000123 xen_xc = xc_interface_open(0, 0, 0);
124 if (xen_xc == NULL) {
Emil Condrea96c77db2016-10-25 08:50:14 +0300125 xen_pv_printf(NULL, 0, "can't open xen interface\n");
Wei Liu04b0de02014-05-07 16:16:43 +0000126 return -1;
127 }
Ian Campbelle0cb42a2016-01-15 13:23:41 +0000128 xen_fmem = xenforeignmemory_open(0, 0);
129 if (xen_fmem == NULL) {
Emil Condrea96c77db2016-10-25 08:50:14 +0300130 xen_pv_printf(NULL, 0, "can't open xen fmem interface\n");
Ian Campbelle0cb42a2016-01-15 13:23:41 +0000131 xc_interface_close(xen_xc);
132 return -1;
133 }
Wei Liu04b0de02014-05-07 16:16:43 +0000134 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
135
Anthony PERARD8c6dc682015-08-03 15:29:21 +0100136 global_state_set_optional();
137 savevm_skip_configuration();
138 savevm_skip_section_footers();
139
Wei Liu04b0de02014-05-07 16:16:43 +0000140 return 0;
141}
142
Eduardo Habkostb152b052014-09-26 17:45:25 -0300143static void xen_accel_class_init(ObjectClass *oc, void *data)
144{
145 AccelClass *ac = ACCEL_CLASS(oc);
146 ac->name = "Xen";
Eduardo Habkost0d15da82014-09-26 17:45:29 -0300147 ac->init_machine = xen_init;
Eduardo Habkostb152b052014-09-26 17:45:25 -0300148 ac->allowed = &xen_allowed;
149}
150
151#define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
152
153static const TypeInfo xen_accel_type = {
154 .name = TYPE_XEN_ACCEL,
155 .parent = TYPE_ACCEL,
156 .class_init = xen_accel_class_init,
157};
158
159static void xen_type_init(void)
160{
161 type_register_static(&xen_accel_type);
162}
163
164type_init(xen_type_init);