2 * QEMU S390 virtio target
5 * Copyright IBM Corp 2012
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * Contributions after 2012-10-29 are licensed under the terms of the
18 * GNU GPL, version 2 or (at your option) any later version.
20 * You should have received a copy of the GNU (Lesser) General Public
21 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
25 #include "block/block.h"
26 #include "sysemu/blockdev.h"
27 #include "sysemu/sysemu.h"
29 #include "hw/boards.h"
30 #include "monitor/monitor.h"
31 #include "hw/loader.h"
32 #include "hw/virtio/virtio.h"
33 #include "hw/sysbus.h"
34 #include "sysemu/kvm.h"
35 #include "exec/address-spaces.h"
37 #include "hw/s390x/s390-virtio-bus.h"
38 #include "hw/s390x/sclp.h"
39 #include "hw/s390x/s390_flic.h"
40 #include "hw/s390x/s390-virtio.h"
45 #define DPRINTF(fmt, ...) \
46 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
48 #define DPRINTF(fmt, ...) \
52 #define MAX_BLK_DEVS 10
53 #define ZIPL_FILENAME "s390-zipl.rom"
54 #define TYPE_S390_MACHINE "s390-machine"
56 static VirtIOS390Bus *s390_bus;
57 static S390CPU **ipi_states;
59 S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
61 if (cpu_addr >= smp_cpus) {
65 return ipi_states[cpu_addr];
68 static int s390_virtio_hcall_notify(const uint64_t *args)
70 uint64_t mem = args[0];
74 VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus, mem, &i);
76 virtio_queue_notify(dev->vdev, i);
86 static int s390_virtio_hcall_reset(const uint64_t *args)
88 uint64_t mem = args[0];
89 VirtIOS390Device *dev;
91 dev = s390_virtio_bus_find_mem(s390_bus, mem);
95 virtio_reset(dev->vdev);
96 stb_phys(&address_space_memory, dev->dev_offs + VIRTIO_DEV_OFFS_STATUS, 0);
97 s390_virtio_device_sync(dev);
98 s390_virtio_reset_idx(dev);
103 static int s390_virtio_hcall_set_status(const uint64_t *args)
105 uint64_t mem = args[0];
107 VirtIOS390Device *dev;
109 dev = s390_virtio_bus_find_mem(s390_bus, mem);
111 s390_virtio_device_update_status(dev);
118 static void s390_virtio_register_hcalls(void)
120 s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY,
121 s390_virtio_hcall_notify);
122 s390_register_virtio_hypercall(KVM_S390_VIRTIO_RESET,
123 s390_virtio_hcall_reset);
124 s390_register_virtio_hypercall(KVM_S390_VIRTIO_SET_STATUS,
125 s390_virtio_hcall_set_status);
129 * The number of running CPUs. On s390 a shutdown is the state of all CPUs
130 * being either stopped or disabled (for interrupts) waiting. We have to
131 * track this number to call the shutdown sequence accordingly. This
132 * number is modified either on startup or while holding the big qemu lock.
134 static unsigned s390_running_cpus;
136 void s390_add_running_cpu(S390CPU *cpu)
138 CPUState *cs = CPU(cpu);
143 cs->exception_index = -1;
147 unsigned s390_del_running_cpu(S390CPU *cpu)
149 CPUState *cs = CPU(cpu);
151 if (cs->halted == 0) {
152 assert(s390_running_cpus >= 1);
155 cs->exception_index = EXCP_HLT;
157 return s390_running_cpus;
160 void s390_init_ipl_dev(const char *kernel_filename,
161 const char *kernel_cmdline,
162 const char *initrd_filename,
163 const char *firmware)
167 dev = qdev_create(NULL, "s390-ipl");
168 if (kernel_filename) {
169 qdev_prop_set_string(dev, "kernel", kernel_filename);
171 if (initrd_filename) {
172 qdev_prop_set_string(dev, "initrd", initrd_filename);
174 qdev_prop_set_string(dev, "cmdline", kernel_cmdline);
175 qdev_prop_set_string(dev, "firmware", firmware);
176 qdev_init_nofail(dev);
179 void s390_init_cpus(const char *cpu_model, uint8_t *storage_keys)
183 if (cpu_model == NULL) {
187 ipi_states = g_malloc(sizeof(S390CPU *) * smp_cpus);
189 for (i = 0; i < smp_cpus; i++) {
193 cpu = cpu_s390x_init(cpu_model);
198 cs->exception_index = EXCP_HLT;
199 cpu->env.storage_keys = storage_keys;
204 void s390_create_virtio_net(BusState *bus, const char *name)
208 for (i = 0; i < nb_nics; i++) {
209 NICInfo *nd = &nd_table[i];
213 nd->model = g_strdup("virtio");
216 if (strcmp(nd->model, "virtio")) {
217 fprintf(stderr, "S390 only supports VirtIO nics\n");
221 dev = qdev_create(bus, name);
222 qdev_set_nic_properties(dev, nd);
223 qdev_init_nofail(dev);
227 /* PC hardware initialisation */
228 static void s390_init(MachineState *machine)
230 ram_addr_t my_ram_size = machine->ram_size;
231 MemoryRegion *sysmem = get_system_memory();
232 MemoryRegion *ram = g_new(MemoryRegion, 1);
233 int increment_size = 20;
234 uint8_t *storage_keys;
236 hwaddr virtio_region_len;
237 hwaddr virtio_region_start;
240 * The storage increment size is a multiple of 1M and is a power of 2.
241 * The number of storage increments must be MAX_STORAGE_INCREMENTS or
244 while ((my_ram_size >> increment_size) > MAX_STORAGE_INCREMENTS) {
247 my_ram_size = my_ram_size >> increment_size << increment_size;
249 /* let's propagate the changed ram size into the global variable. */
250 ram_size = my_ram_size;
253 s390_bus = s390_virtio_bus_init(&my_ram_size);
255 s390_init_ipl_dev(machine->kernel_filename, machine->kernel_cmdline,
256 machine->initrd_filename, ZIPL_FILENAME);
259 /* register hypercalls */
260 s390_virtio_register_hcalls();
263 memory_region_init_ram(ram, NULL, "s390.ram", my_ram_size, &error_abort);
264 vmstate_register_ram_global(ram);
265 memory_region_add_subregion(sysmem, 0, ram);
267 /* clear virtio region */
268 virtio_region_len = my_ram_size - ram_size;
269 virtio_region_start = ram_size;
270 virtio_region = cpu_physical_memory_map(virtio_region_start,
271 &virtio_region_len, true);
272 memset(virtio_region, 0, virtio_region_len);
273 cpu_physical_memory_unmap(virtio_region, virtio_region_len, 1,
276 /* allocate storage keys */
277 storage_keys = g_malloc0(my_ram_size / TARGET_PAGE_SIZE);
280 s390_init_cpus(machine->cpu_model, storage_keys);
282 /* Create VirtIO network adapters */
283 s390_create_virtio_net((BusState *)s390_bus, "virtio-net-s390");
286 void s390_nmi(NMIState *n, int cpu_index, Error **errp)
288 CPUState *cs = qemu_get_cpu(cpu_index);
290 if (s390_cpu_restart(S390_CPU(cs))) {
291 error_set(errp, QERR_UNSUPPORTED);
295 static void s390_machine_class_init(ObjectClass *oc, void *data)
297 MachineClass *mc = MACHINE_CLASS(oc);
298 NMIClass *nc = NMI_CLASS(oc);
300 mc->name = "s390-virtio";
302 mc->desc = "VirtIO based S390 machine";
303 mc->init = s390_init;
304 mc->block_default_type = IF_VIRTIO;
313 nc->nmi_monitor_handler = s390_nmi;
316 static const TypeInfo s390_machine_info = {
317 .name = TYPE_S390_MACHINE,
318 .parent = TYPE_MACHINE,
319 .class_init = s390_machine_class_init,
320 .interfaces = (InterfaceInfo[]) {
326 static void s390_machine_register_types(void)
328 type_register_static(&s390_machine_info);
331 type_init(s390_machine_register_types)