4 * Copyright 2012 IBM Corp.
7 * This work is licensed under the terms of the GNU GPL, version 2 or (at
8 * your option) any later version. See the COPYING file in the top-level
12 #include "hw/boards.h"
13 #include "exec/address-spaces.h"
14 #include "s390-virtio.h"
15 #include "hw/s390x/sclp.h"
16 #include "hw/s390x/s390_flic.h"
19 #include "virtio-ccw.h"
20 #include "qemu/config-file.h"
21 #include "s390-pci-bus.h"
22 #include "hw/s390x/storage-keys.h"
24 #define TYPE_S390_CCW_MACHINE "s390-ccw-machine"
26 #define S390_CCW_MACHINE(obj) \
27 OBJECT_CHECK(S390CcwMachineState, (obj), TYPE_S390_CCW_MACHINE)
29 typedef struct S390CcwMachineState {
31 MachineState parent_obj;
36 } S390CcwMachineState;
38 void io_subsystem_reset(void)
40 DeviceState *css, *sclp, *flic, *diag288;
42 css = DEVICE(object_resolve_path_type("", "virtual-css-bridge", NULL));
46 sclp = DEVICE(object_resolve_path_type("",
47 "s390-sclp-event-facility", NULL));
51 flic = DEVICE(object_resolve_path_type("", "s390-flic", NULL));
55 diag288 = DEVICE(object_resolve_path_type("", "diag288", NULL));
57 qdev_reset_all(diag288);
61 static int virtio_ccw_hcall_notify(const uint64_t *args)
63 uint64_t subch_id = args[0];
64 uint64_t queue = args[1];
66 int cssid, ssid, schid, m;
68 if (ioinst_disassemble_sch_ident(subch_id, &m, &cssid, &ssid, &schid)) {
71 sch = css_find_subch(m, cssid, ssid, schid);
72 if (!sch || !css_subch_visible(sch)) {
75 if (queue >= VIRTIO_CCW_QUEUE_MAX) {
78 virtio_queue_notify(virtio_ccw_get_vdev(sch), queue);
83 static int virtio_ccw_hcall_early_printk(const uint64_t *args)
85 uint64_t mem = args[0];
94 static void virtio_ccw_register_hcalls(void)
96 s390_register_virtio_hypercall(KVM_S390_VIRTIO_CCW_NOTIFY,
97 virtio_ccw_hcall_notify);
98 /* Tolerate early printk. */
99 s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
100 virtio_ccw_hcall_early_printk);
103 static void ccw_init(MachineState *machine)
105 ram_addr_t my_ram_size = machine->ram_size;
106 MemoryRegion *sysmem = get_system_memory();
107 MemoryRegion *ram = g_new(MemoryRegion, 1);
108 sclpMemoryHotplugDev *mhd = init_sclp_memory_hotplug_dev();
110 VirtualCssBus *css_bus;
112 ram_addr_t pad_size = 0;
113 ram_addr_t maxmem = machine->maxram_size;
114 ram_addr_t standby_mem_size = maxmem - my_ram_size;
117 /* The storage increment size is a multiple of 1M and is a power of 2.
118 * The number of storage increments must be MAX_STORAGE_INCREMENTS or fewer.
119 * The variable 'mhd->increment_size' is an exponent of 2 that can be
120 * used to calculate the size (in bytes) of an increment. */
121 mhd->increment_size = 20;
122 while ((my_ram_size >> mhd->increment_size) > MAX_STORAGE_INCREMENTS) {
123 mhd->increment_size++;
125 while ((standby_mem_size >> mhd->increment_size) > MAX_STORAGE_INCREMENTS) {
126 mhd->increment_size++;
129 /* The core and standby memory areas need to be aligned with
130 * the increment size. In effect, this can cause the
131 * user-specified memory size to be rounded down to align
132 * with the nearest increment boundary. */
133 standby_mem_size = standby_mem_size >> mhd->increment_size
134 << mhd->increment_size;
135 my_ram_size = my_ram_size >> mhd->increment_size
136 << mhd->increment_size;
138 /* let's propagate the changed ram size into the global variable. */
139 ram_size = my_ram_size;
140 machine->maxram_size = my_ram_size + standby_mem_size;
142 ret = s390_set_memory_limit(machine->maxram_size, &kvm_limit);
144 hw_error("qemu: host supports a maximum of %" PRIu64 " GB",
147 hw_error("qemu: setting the guest size failed");
151 css_bus = virtual_css_bus_init();
153 s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
154 machine->initrd_filename, "s390-ccw.img", true);
157 dev = qdev_create(NULL, TYPE_S390_PCI_HOST_BRIDGE);
158 object_property_add_child(qdev_get_machine(), TYPE_S390_PCI_HOST_BRIDGE,
160 qdev_init_nofail(dev);
162 /* register hypercalls */
163 virtio_ccw_register_hcalls();
165 /* allocate RAM for core */
166 memory_region_init_ram(ram, NULL, "s390.ram", my_ram_size, &error_abort);
167 vmstate_register_ram_global(ram);
168 memory_region_add_subregion(sysmem, 0, ram);
170 /* If the size of ram is not on a MEM_SECTION_SIZE boundary,
171 calculate the pad size necessary to force this boundary. */
172 if (standby_mem_size) {
173 if (my_ram_size % MEM_SECTION_SIZE) {
174 pad_size = MEM_SECTION_SIZE - my_ram_size % MEM_SECTION_SIZE;
176 my_ram_size += standby_mem_size + pad_size;
177 mhd->pad_size = pad_size;
178 mhd->standby_mem_size = standby_mem_size;
181 /* Initialize storage key device */
185 s390_init_cpus(machine->cpu_model);
188 kvm_s390_enable_css_support(s390_cpu_addr2state(0));
191 * Create virtual css and set it as default so that non mcss-e
192 * enabled guests only see virtio devices.
194 ret = css_create_css_image(VIRTUAL_CSSID, true);
197 /* Create VirtIO network adapters */
198 s390_create_virtio_net(BUS(css_bus), "virtio-net-ccw");
200 /* Register savevm handler for guest TOD clock */
201 register_savevm(NULL, "todclock", 0, 1,
202 gtod_save, gtod_load, kvm_state);
205 static void ccw_machine_class_init(ObjectClass *oc, void *data)
207 MachineClass *mc = MACHINE_CLASS(oc);
208 NMIClass *nc = NMI_CLASS(oc);
211 mc->block_default_type = IF_VIRTIO;
219 nc->nmi_monitor_handler = s390_nmi;
222 static inline bool machine_get_aes_key_wrap(Object *obj, Error **errp)
224 S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
226 return ms->aes_key_wrap;
229 static inline void machine_set_aes_key_wrap(Object *obj, bool value,
232 S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
234 ms->aes_key_wrap = value;
237 static inline bool machine_get_dea_key_wrap(Object *obj, Error **errp)
239 S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
241 return ms->dea_key_wrap;
244 static inline void machine_set_dea_key_wrap(Object *obj, bool value,
247 S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
249 ms->dea_key_wrap = value;
252 static inline void s390_machine_initfn(Object *obj)
254 object_property_add_bool(obj, "aes-key-wrap",
255 machine_get_aes_key_wrap,
256 machine_set_aes_key_wrap, NULL);
257 object_property_set_description(obj, "aes-key-wrap",
258 "enable/disable AES key wrapping using the CPACF wrapping key",
260 object_property_set_bool(obj, true, "aes-key-wrap", NULL);
262 object_property_add_bool(obj, "dea-key-wrap",
263 machine_get_dea_key_wrap,
264 machine_set_dea_key_wrap, NULL);
265 object_property_set_description(obj, "dea-key-wrap",
266 "enable/disable DEA key wrapping using the CPACF wrapping key",
268 object_property_set_bool(obj, true, "dea-key-wrap", NULL);
271 static const TypeInfo ccw_machine_info = {
272 .name = TYPE_S390_CCW_MACHINE,
273 .parent = TYPE_MACHINE,
275 .instance_size = sizeof(S390CcwMachineState),
276 .instance_init = s390_machine_initfn,
277 .class_init = ccw_machine_class_init,
278 .interfaces = (InterfaceInfo[]) {
284 #define CCW_COMPAT_2_4 \
286 .driver = TYPE_S390_SKEYS,\
287 .property = "migration-enabled",\
291 static void ccw_machine_2_4_class_init(ObjectClass *oc, void *data)
293 MachineClass *mc = MACHINE_CLASS(oc);
294 static GlobalProperty compat_props[] = {
296 { /* end of list */ }
299 mc->name = "s390-ccw-virtio-2.4";
300 mc->desc = "VirtIO-ccw based S390 machine v2.4";
301 mc->compat_props = compat_props;
304 static const TypeInfo ccw_machine_2_4_info = {
305 .name = TYPE_S390_CCW_MACHINE "2.4",
306 .parent = TYPE_S390_CCW_MACHINE,
307 .class_init = ccw_machine_2_4_class_init,
310 static void ccw_machine_2_5_class_init(ObjectClass *oc, void *data)
312 MachineClass *mc = MACHINE_CLASS(oc);
314 mc->name = "s390-ccw-virtio-2.5";
315 mc->alias = "s390-ccw-virtio";
316 mc->desc = "VirtIO-ccw based S390 machine v2.5";
320 static const TypeInfo ccw_machine_2_5_info = {
321 .name = TYPE_S390_CCW_MACHINE "2.5",
322 .parent = TYPE_S390_CCW_MACHINE,
323 .class_init = ccw_machine_2_5_class_init,
326 static void ccw_machine_register_types(void)
328 type_register_static(&ccw_machine_info);
329 type_register_static(&ccw_machine_2_4_info);
330 type_register_static(&ccw_machine_2_5_info);
333 type_init(ccw_machine_register_types)