2 * QEMU S390 virtio target
4 * Copyright (c) 2009 Alexander Graf <agraf@suse.de>
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"
30 #include "monitor/monitor.h"
32 #include "hw/virtio.h"
33 #include "hw/sysbus.h"
34 #include "sysemu/kvm.h"
35 #include "exec/address-spaces.h"
37 #include "hw/s390-virtio-bus.h"
38 #include "hw/s390x/sclp.h"
39 #include "hw/s390-virtio.h"
44 #define dprintf(fmt, ...) \
45 do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
47 #define dprintf(fmt, ...) \
51 #define MAX_BLK_DEVS 10
53 static VirtIOS390Bus
*s390_bus
;
54 static S390CPU
**ipi_states
;
56 S390CPU
*s390_cpu_addr2state(uint16_t cpu_addr
)
58 if (cpu_addr
>= smp_cpus
) {
62 return ipi_states
[cpu_addr
];
65 static int s390_virtio_hcall_notify(const uint64_t *args
)
67 uint64_t mem
= args
[0];
71 VirtIOS390Device
*dev
= s390_virtio_bus_find_vring(s390_bus
, mem
, &i
);
73 virtio_queue_notify(dev
->vdev
, i
);
83 static int s390_virtio_hcall_reset(const uint64_t *args
)
85 uint64_t mem
= args
[0];
86 VirtIOS390Device
*dev
;
88 dev
= s390_virtio_bus_find_mem(s390_bus
, mem
);
89 virtio_reset(dev
->vdev
);
90 stb_phys(dev
->dev_offs
+ VIRTIO_DEV_OFFS_STATUS
, 0);
91 s390_virtio_device_sync(dev
);
92 s390_virtio_reset_idx(dev
);
97 static int s390_virtio_hcall_set_status(const uint64_t *args
)
99 uint64_t mem
= args
[0];
101 VirtIOS390Device
*dev
;
103 dev
= s390_virtio_bus_find_mem(s390_bus
, mem
);
105 s390_virtio_device_update_status(dev
);
112 static void s390_virtio_register_hcalls(void)
114 s390_register_virtio_hypercall(KVM_S390_VIRTIO_NOTIFY
,
115 s390_virtio_hcall_notify
);
116 s390_register_virtio_hypercall(KVM_S390_VIRTIO_RESET
,
117 s390_virtio_hcall_reset
);
118 s390_register_virtio_hypercall(KVM_S390_VIRTIO_SET_STATUS
,
119 s390_virtio_hcall_set_status
);
123 * The number of running CPUs. On s390 a shutdown is the state of all CPUs
124 * being either stopped or disabled (for interrupts) waiting. We have to
125 * track this number to call the shutdown sequence accordingly. This
126 * number is modified either on startup or while holding the big qemu lock.
128 static unsigned s390_running_cpus
;
130 void s390_add_running_cpu(CPUS390XState
*env
)
135 env
->exception_index
= -1;
139 unsigned s390_del_running_cpu(CPUS390XState
*env
)
141 if (env
->halted
== 0) {
142 assert(s390_running_cpus
>= 1);
145 env
->exception_index
= EXCP_HLT
;
147 return s390_running_cpus
;
150 /* PC hardware initialisation */
151 static void s390_init(QEMUMachineInitArgs
*args
)
153 ram_addr_t my_ram_size
= args
->ram_size
;
154 const char *cpu_model
= args
->cpu_model
;
155 CPUS390XState
*env
= NULL
;
157 MemoryRegion
*sysmem
= get_system_memory();
158 MemoryRegion
*ram
= g_new(MemoryRegion
, 1);
160 uint8_t *storage_keys
;
162 hwaddr virtio_region_len
;
163 hwaddr virtio_region_start
;
166 /* s390x ram size detection needs a 16bit multiplier + an increment. So
167 guests > 64GB can be specified in 2MB steps etc. */
168 while ((my_ram_size
>> (20 + shift
)) > 65535) {
171 my_ram_size
= my_ram_size
>> (20 + shift
) << (20 + shift
);
173 /* lets propagate the changed ram size into the global variable. */
174 ram_size
= my_ram_size
;
177 s390_bus
= s390_virtio_bus_init(&my_ram_size
);
179 dev
= qdev_create(NULL
, "s390-ipl");
180 if (args
->kernel_filename
) {
181 qdev_prop_set_string(dev
, "kernel", args
->kernel_filename
);
183 if (args
->initrd_filename
) {
184 qdev_prop_set_string(dev
, "initrd", args
->initrd_filename
);
186 qdev_prop_set_string(dev
, "cmdline", args
->kernel_cmdline
);
187 qdev_init_nofail(dev
);
189 /* register hypercalls */
190 s390_virtio_register_hcalls();
193 memory_region_init_ram(ram
, "s390.ram", my_ram_size
);
194 vmstate_register_ram_global(ram
);
195 memory_region_add_subregion(sysmem
, 0, ram
);
197 /* clear virtio region */
198 virtio_region_len
= my_ram_size
- ram_size
;
199 virtio_region_start
= ram_size
;
200 virtio_region
= cpu_physical_memory_map(virtio_region_start
,
201 &virtio_region_len
, true);
202 memset(virtio_region
, 0, virtio_region_len
);
203 cpu_physical_memory_unmap(virtio_region
, virtio_region_len
, 1,
206 /* allocate storage keys */
207 storage_keys
= g_malloc0(my_ram_size
/ TARGET_PAGE_SIZE
);
210 if (cpu_model
== NULL
) {
214 ipi_states
= g_malloc(sizeof(S390CPU
*) * smp_cpus
);
216 for (i
= 0; i
< smp_cpus
; i
++) {
218 CPUS390XState
*tmp_env
;
220 cpu
= cpu_s390x_init(cpu_model
);
227 tmp_env
->exception_index
= EXCP_HLT
;
228 tmp_env
->storage_keys
= storage_keys
;
232 /* Create VirtIO network adapters */
233 for(i
= 0; i
< nb_nics
; i
++) {
234 NICInfo
*nd
= &nd_table
[i
];
238 nd
->model
= g_strdup("virtio");
241 if (strcmp(nd
->model
, "virtio")) {
242 fprintf(stderr
, "S390 only supports VirtIO nics\n");
246 dev
= qdev_create((BusState
*)s390_bus
, "virtio-net-s390");
247 qdev_set_nic_properties(dev
, nd
);
248 qdev_init_nofail(dev
);
252 static QEMUMachine s390_machine
= {
253 .name
= "s390-virtio",
255 .desc
= "VirtIO based S390 machine",
257 .block_default_type
= IF_VIRTIO
,
266 DEFAULT_MACHINE_OPTIONS
,
269 static void s390_machine_init(void)
271 qemu_register_machine(&s390_machine
);
274 machine_init(s390_machine_init
);