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