block/curl: Use BDRV_SECTOR_SIZE
[qemu/ar7.git] / xen-common.c
blobbacf962841a54059bbebffcfca1f2a7fc56dad4d
1 /*
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.
9 */
11 #include "qemu/osdep.h"
12 #include "hw/i386/pc.h"
13 #include "hw/xen/xen_backend.h"
14 #include "qmp-commands.h"
15 #include "sysemu/char.h"
16 #include "sysemu/accel.h"
17 #include "migration/migration.h"
19 //#define DEBUG_XEN
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
29 static int store_dev_info(int domid, CharDriverState *cs, const char *string)
31 struct xs_handle *xs = NULL;
32 char *path = NULL;
33 char *newpath = NULL;
34 char *pts = NULL;
35 int ret = -1;
37 /* Only continue if we're talking to a pty. */
38 if (strncmp(cs->filename, "pty:", 4)) {
39 return 0;
41 pts = cs->filename + 4;
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;
50 path = xs_get_domain_path(xs, domid);
51 if (path == NULL) {
52 fprintf(stderr, "xs_get_domain_path() error\n");
53 goto out;
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;
61 path = newpath;
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;
69 ret = 0;
71 out:
72 free(path);
73 xs_close(xs);
75 return ret;
78 void xenstore_store_pv_console_info(int i, CharDriverState *chr)
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);
90 static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
92 char path[50];
94 if (xs == NULL) {
95 fprintf(stderr, "xenstore connection not initialized\n");
96 exit(1);
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);
107 static void xen_change_state_handler(void *opaque, int running,
108 RunState state)
110 if (running) {
111 /* record state running */
112 xenstore_record_dm_state(xenstore, "running");
116 static int xen_init(MachineState *ms)
118 PCMachineState *pcms = PC_MACHINE(ms);
120 /* Disable ACPI build because Xen handles it */
121 pcms->acpi_build_enabled = false;
123 xen_xc = xc_interface_open(0, 0, 0);
124 if (xen_xc == NULL) {
125 xen_pv_printf(NULL, 0, "can't open xen interface\n");
126 return -1;
128 xen_fmem = xenforeignmemory_open(0, 0);
129 if (xen_fmem == NULL) {
130 xen_pv_printf(NULL, 0, "can't open xen fmem interface\n");
131 xc_interface_close(xen_xc);
132 return -1;
134 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
136 global_state_set_optional();
137 savevm_skip_configuration();
138 savevm_skip_section_footers();
140 return 0;
143 static void xen_accel_class_init(ObjectClass *oc, void *data)
145 AccelClass *ac = ACCEL_CLASS(oc);
146 ac->name = "Xen";
147 ac->init_machine = xen_init;
148 ac->allowed = &xen_allowed;
151 #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
153 static const TypeInfo xen_accel_type = {
154 .name = TYPE_XEN_ACCEL,
155 .parent = TYPE_ACCEL,
156 .class_init = xen_accel_class_init,
159 static void xen_type_init(void)
161 type_register_static(&xen_accel_type);
164 type_init(xen_type_init);