2 * Copyright (C) 2014 Citrix Systems UK Ltd.
4 * This work is licensed under the terms of the GNU GPL, version 2. See
5 * the COPYING file in the top-level directory.
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.
11 #include "qemu/osdep.h"
12 #include "qemu/error-report.h"
13 #include "qemu/module.h"
14 #include "hw/xen/xen-legacy-backend.h"
15 #include "chardev/char.h"
16 #include "sysemu/accel.h"
17 #include "migration/misc.h"
18 #include "migration/global_state.h"
23 #define DPRINTF(fmt, ...) \
24 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
26 #define DPRINTF(fmt, ...) \
31 xenforeignmemory_handle
*xen_fmem
;
32 xendevicemodel_handle
*xen_dmod
;
34 static int store_dev_info(int domid
, Chardev
*cs
, const char *string
)
36 struct xs_handle
*xs
= NULL
;
42 /* Only continue if we're talking to a pty. */
43 if (!CHARDEV_IS_PTY(cs
)) {
46 pts
= cs
->filename
+ 4;
48 /* We now have everything we need to set the xenstore entry. */
51 fprintf(stderr
, "Could not contact XenStore\n");
55 path
= xs_get_domain_path(xs
, domid
);
57 fprintf(stderr
, "xs_get_domain_path() error\n");
60 newpath
= realloc(path
, (strlen(path
) + strlen(string
) +
62 if (newpath
== NULL
) {
63 fprintf(stderr
, "realloc error\n");
70 if (!xs_write(xs
, XBT_NULL
, path
, pts
, strlen(pts
))) {
71 fprintf(stderr
, "xs_write for '%s' fail", string
);
83 void xenstore_store_pv_console_info(int i
, Chardev
*chr
)
86 store_dev_info(xen_domid
, chr
, "/console");
89 snprintf(buf
, sizeof(buf
), "/device/console/%d", i
);
90 store_dev_info(xen_domid
, chr
, buf
);
95 static void xenstore_record_dm_state(struct xs_handle
*xs
, const char *state
)
100 error_report("xenstore connection not initialized");
104 snprintf(path
, sizeof (path
), "device-model/%u/state", xen_domid
);
106 * This call may fail when running restricted so don't make it fatal in
107 * that case. Toolstacks should instead use QMP to listen for state changes.
109 if (!xs_write(xs
, XBT_NULL
, path
, state
, strlen(state
)) &&
110 !xen_domid_restrict
) {
111 error_report("error recording dm state");
117 static void xen_change_state_handler(void *opaque
, int running
,
121 /* record state running */
122 xenstore_record_dm_state(xenstore
, "running");
126 static void xen_setup_post(MachineState
*ms
, AccelState
*accel
)
130 if (xen_domid_restrict
) {
131 rc
= xen_restrict(xen_domid
);
133 perror("xen: failed to restrict");
139 static int xen_init(MachineState
*ms
)
141 xen_xc
= xc_interface_open(0, 0, 0);
142 if (xen_xc
== NULL
) {
143 xen_pv_printf(NULL
, 0, "can't open xen interface\n");
146 xen_fmem
= xenforeignmemory_open(0, 0);
147 if (xen_fmem
== NULL
) {
148 xen_pv_printf(NULL
, 0, "can't open xen fmem interface\n");
149 xc_interface_close(xen_xc
);
152 xen_dmod
= xendevicemodel_open(0, 0);
153 if (xen_dmod
== NULL
) {
154 xen_pv_printf(NULL
, 0, "can't open xen devicemodel interface\n");
155 xenforeignmemory_close(xen_fmem
);
156 xc_interface_close(xen_xc
);
159 qemu_add_vm_change_state_handler(xen_change_state_handler
, NULL
);
163 static void xen_accel_class_init(ObjectClass
*oc
, void *data
)
165 AccelClass
*ac
= ACCEL_CLASS(oc
);
166 static GlobalProperty compat
[] = {
167 { "migration", "store-global-state", "off" },
168 { "migration", "send-configuration", "off" },
169 { "migration", "send-section-footer", "off" },
173 ac
->init_machine
= xen_init
;
174 ac
->setup_post
= xen_setup_post
;
175 ac
->allowed
= &xen_allowed
;
176 ac
->compat_props
= g_ptr_array_new();
178 compat_props_add(ac
->compat_props
, compat
, G_N_ELEMENTS(compat
));
181 #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
183 static const TypeInfo xen_accel_type
= {
184 .name
= TYPE_XEN_ACCEL
,
185 .parent
= TYPE_ACCEL
,
186 .class_init
= xen_accel_class_init
,
189 static void xen_type_init(void)
191 type_register_static(&xen_accel_type
);
194 type_init(xen_type_init
);