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_native.h" 16 #include "hw/xen/xen-legacy-backend.h" 17 #include "hw/xen/xen_pt.h" 18 #include "chardev/char.h" 19 #include "qemu/accel.h" 20 #include "sysemu/cpus.h" 21 #include "sysemu/xen.h" 22 #include "sysemu/runstate.h" 23 #include "migration/misc.h" 24 #include "migration/global_state.h" 25 #include "hw/boards.h" 26 27 bool xen_allowed; 28 29 xc_interface *xen_xc; 30 xenforeignmemory_handle *xen_fmem; 31 xendevicemodel_handle *xen_dmod; 32 33 static void xenstore_record_dm_state(const char *state) 34 { 35 struct xs_handle *xs; 36 char path[50]; 37 38 /* We now have everything we need to set the xenstore entry. */ 39 xs = xs_open(0); 40 if (xs == NULL) { 41 fprintf(stderr, "Could not contact XenStore\n"); 42 exit(1); 43 } 44 45 snprintf(path, sizeof (path), "device-model/%u/state", xen_domid); 46 /* 47 * This call may fail when running restricted so don't make it fatal in 48 * that case. Toolstacks should instead use QMP to listen for state changes. 49 */ 50 if (!xs_write(xs, XBT_NULL, path, state, strlen(state)) && 51 !xen_domid_restrict) { 52 error_report("error recording dm state"); 53 exit(1); 54 } 55 56 xs_close(xs); 57 } 58 59 60 static void xen_change_state_handler(void *opaque, bool running, 61 RunState state) 62 { 63 if (running) { 64 /* record state running */ 65 xenstore_record_dm_state("running"); 66 } 67 } 68 69 static bool xen_get_igd_gfx_passthru(Object *obj, Error **errp) 70 { 71 return xen_igd_gfx_pt_enabled(); 72 } 73 74 static void xen_set_igd_gfx_passthru(Object *obj, bool value, Error **errp) 75 { 76 xen_igd_gfx_pt_set(value, errp); 77 } 78 79 static void xen_setup_post(MachineState *ms, AccelState *accel) 80 { 81 int rc; 82 83 if (xen_domid_restrict) { 84 rc = xen_restrict(xen_domid); 85 if (rc < 0) { 86 perror("xen: failed to restrict"); 87 exit(1); 88 } 89 } 90 } 91 92 static int xen_init(MachineState *ms) 93 { 94 MachineClass *mc = MACHINE_GET_CLASS(ms); 95 96 xen_xc = xc_interface_open(0, 0, 0); 97 if (xen_xc == NULL) { 98 xen_pv_printf(NULL, 0, "can't open xen interface\n"); 99 return -1; 100 } 101 xen_fmem = xenforeignmemory_open(0, 0); 102 if (xen_fmem == NULL) { 103 xen_pv_printf(NULL, 0, "can't open xen fmem interface\n"); 104 xc_interface_close(xen_xc); 105 return -1; 106 } 107 xen_dmod = xendevicemodel_open(0, 0); 108 if (xen_dmod == NULL) { 109 xen_pv_printf(NULL, 0, "can't open xen devicemodel interface\n"); 110 xenforeignmemory_close(xen_fmem); 111 xc_interface_close(xen_xc); 112 return -1; 113 } 114 qemu_add_vm_change_state_handler(xen_change_state_handler, NULL); 115 /* 116 * opt out of system RAM being allocated by generic code 117 */ 118 mc->default_ram_id = NULL; 119 120 xen_mode = XEN_ATTACH; 121 return 0; 122 } 123 124 static void xen_accel_class_init(ObjectClass *oc, void *data) 125 { 126 AccelClass *ac = ACCEL_CLASS(oc); 127 static GlobalProperty compat[] = { 128 { "migration", "store-global-state", "off" }, 129 { "migration", "send-configuration", "off" }, 130 { "migration", "send-section-footer", "off" }, 131 }; 132 133 ac->name = "Xen"; 134 ac->init_machine = xen_init; 135 ac->setup_post = xen_setup_post; 136 ac->allowed = &xen_allowed; 137 ac->compat_props = g_ptr_array_new(); 138 139 compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat)); 140 141 object_class_property_add_bool(oc, "igd-passthru", 142 xen_get_igd_gfx_passthru, xen_set_igd_gfx_passthru); 143 object_class_property_set_description(oc, "igd-passthru", 144 "Set on/off to enable/disable igd passthrou"); 145 } 146 147 #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen") 148 149 static const TypeInfo xen_accel_type = { 150 .name = TYPE_XEN_ACCEL, 151 .parent = TYPE_ACCEL, 152 .class_init = xen_accel_class_init, 153 }; 154 155 static void xen_accel_ops_class_init(ObjectClass *oc, void *data) 156 { 157 AccelOpsClass *ops = ACCEL_OPS_CLASS(oc); 158 159 ops->create_vcpu_thread = dummy_start_vcpu_thread; 160 } 161 162 static const TypeInfo xen_accel_ops_type = { 163 .name = ACCEL_OPS_NAME("xen"), 164 165 .parent = TYPE_ACCEL_OPS, 166 .class_init = xen_accel_ops_class_init, 167 .abstract = true, 168 }; 169 170 static void xen_type_init(void) 171 { 172 type_register_static(&xen_accel_type); 173 type_register_static(&xen_accel_ops_type); 174 } 175 type_init(xen_type_init); 176