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