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