target/ppc: Fix slbia TLB invalidation gap
[qemu.git] / hw / xen / xen-common.c
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
11 #include "qemu/osdep.h"
12 #include "qemu/error-report.h"
13 #include "qemu/module.h"
14 #include "qapi/error.h"
15 #include "hw/xen/xen-legacy-backend.h"
16 #include "hw/xen/xen_pt.h"
17 #include "chardev/char.h"
18 #include "sysemu/accel.h"
19 #include "sysemu/runstate.h"
20 #include "migration/misc.h"
21 #include "migration/global_state.h"
22
23 //#define DEBUG_XEN
24
25 #ifdef DEBUG_XEN
26 #define DPRINTF(fmt, ...) \
27 do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
28 #else
29 #define DPRINTF(fmt, ...) \
30 do { } while (0)
31 #endif
32
33 xc_interface *xen_xc;
34 xenforeignmemory_handle *xen_fmem;
35 xendevicemodel_handle *xen_dmod;
36
37 static int store_dev_info(int domid, Chardev *cs, const char *string)
38 {
39 struct xs_handle *xs = NULL;
40 char *path = NULL;
41 char *newpath = NULL;
42 char *pts = NULL;
43 int ret = -1;
44
45 /* Only continue if we're talking to a pty. */
46 if (!CHARDEV_IS_PTY(cs)) {
47 return 0;
48 }
49 pts = cs->filename + 4;
50
51 /* We now have everything we need to set the xenstore entry. */
52 xs = xs_open(0);
53 if (xs == NULL) {
54 fprintf(stderr, "Could not contact XenStore\n");
55 goto out;
56 }
57
58 path = xs_get_domain_path(xs, domid);
59 if (path == NULL) {
60 fprintf(stderr, "xs_get_domain_path() error\n");
61 goto out;
62 }
63 newpath = realloc(path, (strlen(path) + strlen(string) +
64 strlen("/tty") + 1));
65 if (newpath == NULL) {
66 fprintf(stderr, "realloc error\n");
67 goto out;
68 }
69 path = newpath;
70
71 strcat(path, string);
72 strcat(path, "/tty");
73 if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
74 fprintf(stderr, "xs_write for '%s' fail", string);
75 goto out;
76 }
77 ret = 0;
78
79 out:
80 free(path);
81 xs_close(xs);
82
83 return ret;
84 }
85
86 void xenstore_store_pv_console_info(int i, Chardev *chr)
87 {
88 if (i == 0) {
89 store_dev_info(xen_domid, chr, "/console");
90 } else {
91 char buf[32];
92 snprintf(buf, sizeof(buf), "/device/console/%d", i);
93 store_dev_info(xen_domid, chr, buf);
94 }
95 }
96
97
98 static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
99 {
100 char path[50];
101
102 if (xs == NULL) {
103 error_report("xenstore connection not initialized");
104 exit(1);
105 }
106
107 snprintf(path, sizeof (path), "device-model/%u/state", xen_domid);
108 /*
109 * This call may fail when running restricted so don't make it fatal in
110 * that case. Toolstacks should instead use QMP to listen for state changes.
111 */
112 if (!xs_write(xs, XBT_NULL, path, state, strlen(state)) &&
113 !xen_domid_restrict) {
114 error_report("error recording dm state");
115 exit(1);
116 }
117 }
118
119
120 static void xen_change_state_handler(void *opaque, int running,
121 RunState state)
122 {
123 if (running) {
124 /* record state running */
125 xenstore_record_dm_state(xenstore, "running");
126 }
127 }
128
129 static bool xen_get_igd_gfx_passthru(Object *obj, Error **errp)
130 {
131 return has_igd_gfx_passthru;
132 }
133
134 static void xen_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
135 {
136 has_igd_gfx_passthru = value;
137 }
138
139 static void xen_setup_post(MachineState *ms, AccelState *accel)
140 {
141 int rc;
142
143 if (xen_domid_restrict) {
144 rc = xen_restrict(xen_domid);
145 if (rc < 0) {
146 perror("xen: failed to restrict");
147 exit(1);
148 }
149 }
150 }
151
152 static int xen_init(MachineState *ms)
153 {
154 xen_xc = xc_interface_open(0, 0, 0);
155 if (xen_xc == NULL) {
156 xen_pv_printf(NULL, 0, "can't open xen interface\n");
157 return -1;
158 }
159 xen_fmem = xenforeignmemory_open(0, 0);
160 if (xen_fmem == NULL) {
161 xen_pv_printf(NULL, 0, "can't open xen fmem interface\n");
162 xc_interface_close(xen_xc);
163 return -1;
164 }
165 xen_dmod = xendevicemodel_open(0, 0);
166 if (xen_dmod == NULL) {
167 xen_pv_printf(NULL, 0, "can't open xen devicemodel interface\n");
168 xenforeignmemory_close(xen_fmem);
169 xc_interface_close(xen_xc);
170 return -1;
171 }
172 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
173 return 0;
174 }
175
176 static void xen_accel_class_init(ObjectClass *oc, void *data)
177 {
178 AccelClass *ac = ACCEL_CLASS(oc);
179 static GlobalProperty compat[] = {
180 { "migration", "store-global-state", "off" },
181 { "migration", "send-configuration", "off" },
182 { "migration", "send-section-footer", "off" },
183 };
184
185 ac->name = "Xen";
186 ac->init_machine = xen_init;
187 ac->setup_post = xen_setup_post;
188 ac->allowed = &xen_allowed;
189 ac->compat_props = g_ptr_array_new();
190
191 compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat));
192
193 object_class_property_add_bool(oc, "igd-passthru",
194 xen_get_igd_gfx_passthru, xen_set_igd_gfx_passthru,
195 &error_abort);
196 object_class_property_set_description(oc, "igd-passthru",
197 "Set on/off to enable/disable igd passthrou", &error_abort);
198 }
199
200 #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
201
202 static const TypeInfo xen_accel_type = {
203 .name = TYPE_XEN_ACCEL,
204 .parent = TYPE_ACCEL,
205 .class_init = xen_accel_class_init,
206 };
207
208 static void xen_type_init(void)
209 {
210 type_register_static(&xen_accel_type);
211 }
212
213 type_init(xen_type_init);