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