| 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/core/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); |