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