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 "hw/xen/xen-legacy-backend.h"
14 #include "chardev/char.h"
15 #include "sysemu/accel.h"
16 #include "migration/misc.h"
17 #include "migration/global_state.h"
22 #define DPRINTF(fmt, ...) \
23 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
25 #define DPRINTF(fmt, ...) \
30 xenforeignmemory_handle *xen_fmem;
31 xendevicemodel_handle *xen_dmod;
33 static int store_dev_info(int domid, Chardev *cs, const char *string)
35 struct xs_handle *xs = NULL;
41 /* Only continue if we're talking to a pty. */
42 if (!CHARDEV_IS_PTY(cs)) {
45 pts = cs->filename + 4;
47 /* We now have everything we need to set the xenstore entry. */
50 fprintf(stderr, "Could not contact XenStore\n");
54 path = xs_get_domain_path(xs, domid);
56 fprintf(stderr, "xs_get_domain_path() error\n");
59 newpath = realloc(path, (strlen(path) + strlen(string) +
61 if (newpath == NULL) {
62 fprintf(stderr, "realloc error\n");
69 if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
70 fprintf(stderr, "xs_write for '%s' fail", string);
82 void xenstore_store_pv_console_info(int i, Chardev *chr)
85 store_dev_info(xen_domid, chr, "/console");
88 snprintf(buf, sizeof(buf), "/device/console/%d", i);
89 store_dev_info(xen_domid, chr, buf);
94 static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
99 error_report("xenstore connection not initialized");
103 snprintf(path, sizeof (path), "device-model/%u/state", xen_domid);
105 * This call may fail when running restricted so don't make it fatal in
106 * that case. Toolstacks should instead use QMP to listen for state changes.
108 if (!xs_write(xs, XBT_NULL, path, state, strlen(state)) &&
109 !xen_domid_restrict) {
110 error_report("error recording dm state");
116 static void xen_change_state_handler(void *opaque, int running,
120 /* record state running */
121 xenstore_record_dm_state(xenstore, "running");
125 static void xen_setup_post(MachineState *ms, AccelState *accel)
129 if (xen_domid_restrict) {
130 rc = xen_restrict(xen_domid);
132 perror("xen: failed to restrict");
138 static int xen_init(MachineState *ms)
140 xen_xc = xc_interface_open(0, 0, 0);
141 if (xen_xc == NULL) {
142 xen_pv_printf(NULL, 0, "can't open xen interface\n");
145 xen_fmem = xenforeignmemory_open(0, 0);
146 if (xen_fmem == NULL) {
147 xen_pv_printf(NULL, 0, "can't open xen fmem interface\n");
148 xc_interface_close(xen_xc);
151 xen_dmod = xendevicemodel_open(0, 0);
152 if (xen_dmod == NULL) {
153 xen_pv_printf(NULL, 0, "can't open xen devicemodel interface\n");
154 xenforeignmemory_close(xen_fmem);
155 xc_interface_close(xen_xc);
158 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
162 static void xen_accel_class_init(ObjectClass *oc, void *data)
164 AccelClass *ac = ACCEL_CLASS(oc);
165 static GlobalProperty compat[] = {
166 { "migration", "store-global-state", "off" },
167 { "migration", "send-configuration", "off" },
168 { "migration", "send-section-footer", "off" },
172 ac->init_machine = xen_init;
173 ac->setup_post = xen_setup_post;
174 ac->allowed = &xen_allowed;
175 ac->compat_props = g_ptr_array_new();
177 compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat));
180 #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
182 static const TypeInfo xen_accel_type = {
183 .name = TYPE_XEN_ACCEL,
184 .parent = TYPE_ACCEL,
185 .class_init = xen_accel_class_init,
188 static void xen_type_init(void)
190 type_register_static(&xen_accel_type);
193 type_init(xen_type_init);