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8cb310e1 AG |
1 | /* |
2 | * QEMU S390 virtio target | |
3 | * | |
4 | * Copyright (c) 2009 Alexander Graf <agraf@suse.de> | |
904e5fd5 | 5 | * Copyright IBM Corp 2012 |
8cb310e1 AG |
6 | * |
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. | |
11 | * | |
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. | |
16 | * | |
904e5fd5 VM |
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. | |
19 | * | |
20 | * You should have received a copy of the GNU (Lesser) General Public | |
8cb310e1 AG |
21 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. |
22 | */ | |
23 | ||
b73d3531 | 24 | #include "hw/hw.h" |
737e150e | 25 | #include "block/block.h" |
9c17d615 PB |
26 | #include "sysemu/blockdev.h" |
27 | #include "sysemu/sysemu.h" | |
1422e32d | 28 | #include "net/net.h" |
b73d3531 | 29 | #include "hw/boards.h" |
83c9089e | 30 | #include "monitor/monitor.h" |
b73d3531 | 31 | #include "hw/loader.h" |
8cb310e1 | 32 | #include "hw/virtio.h" |
8cb310e1 | 33 | #include "hw/sysbus.h" |
9c17d615 | 34 | #include "sysemu/kvm.h" |
022c62cb | 35 | #include "exec/address-spaces.h" |
8cb310e1 | 36 | |
b73d3531 | 37 | #include "hw/s390x/s390-virtio-bus.h" |
559a17a1 | 38 | #include "hw/s390x/sclp.h" |
b73d3531 | 39 | #include "hw/s390x/s390-virtio.h" |
8cb310e1 AG |
40 | |
41 | //#define DEBUG_S390 | |
42 | ||
43 | #ifdef DEBUG_S390 | |
44 | #define dprintf(fmt, ...) \ | |
45 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
46 | #else | |
47 | #define dprintf(fmt, ...) \ | |
48 | do { } while (0) | |
49 | #endif | |
50 | ||
8cb310e1 AG |
51 | #define MAX_BLK_DEVS 10 |
52 | ||
53 | static VirtIOS390Bus *s390_bus; | |
45fa769b | 54 | static S390CPU **ipi_states; |
8cb310e1 | 55 | |
45fa769b | 56 | S390CPU *s390_cpu_addr2state(uint16_t cpu_addr) |
8cb310e1 AG |
57 | { |
58 | if (cpu_addr >= smp_cpus) { | |
59 | return NULL; | |
60 | } | |
61 | ||
62 | return ipi_states[cpu_addr]; | |
63 | } | |
64 | ||
28e942f8 | 65 | static int s390_virtio_hcall_notify(const uint64_t *args) |
8cb310e1 | 66 | { |
28e942f8 | 67 | uint64_t mem = args[0]; |
8cb310e1 | 68 | int r = 0, i; |
8cb310e1 | 69 | |
28e942f8 CH |
70 | if (mem > ram_size) { |
71 | VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus, mem, &i); | |
8cb310e1 | 72 | if (dev) { |
28e942f8 | 73 | virtio_queue_notify(dev->vdev, i); |
8cb310e1 AG |
74 | } else { |
75 | r = -EINVAL; | |
76 | } | |
28e942f8 CH |
77 | } else { |
78 | /* Early printk */ | |
8cb310e1 | 79 | } |
28e942f8 CH |
80 | return r; |
81 | } | |
82 | ||
83 | static int s390_virtio_hcall_reset(const uint64_t *args) | |
84 | { | |
85 | uint64_t mem = args[0]; | |
86 | VirtIOS390Device *dev; | |
87 | ||
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); | |
93 | ||
94 | return 0; | |
95 | } | |
96 | ||
97 | static int s390_virtio_hcall_set_status(const uint64_t *args) | |
98 | { | |
99 | uint64_t mem = args[0]; | |
100 | int r = 0; | |
101 | VirtIOS390Device *dev; | |
102 | ||
103 | dev = s390_virtio_bus_find_mem(s390_bus, mem); | |
104 | if (dev) { | |
105 | s390_virtio_device_update_status(dev); | |
106 | } else { | |
8cb310e1 | 107 | r = -EINVAL; |
8cb310e1 | 108 | } |
8d5192ee | 109 | return r; |
8cb310e1 AG |
110 | } |
111 | ||
28e942f8 CH |
112 | static void s390_virtio_register_hcalls(void) |
113 | { | |
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); | |
120 | } | |
121 | ||
854e42f3 CB |
122 | /* |
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. | |
127 | */ | |
128 | static unsigned s390_running_cpus; | |
129 | ||
0e4213a7 | 130 | void s390_add_running_cpu(CPUS390XState *env) |
854e42f3 CB |
131 | { |
132 | if (env->halted) { | |
133 | s390_running_cpus++; | |
134 | env->halted = 0; | |
135 | env->exception_index = -1; | |
136 | } | |
137 | } | |
138 | ||
0e4213a7 | 139 | unsigned s390_del_running_cpu(CPUS390XState *env) |
854e42f3 CB |
140 | { |
141 | if (env->halted == 0) { | |
142 | assert(s390_running_cpus >= 1); | |
143 | s390_running_cpus--; | |
144 | env->halted = 1; | |
145 | env->exception_index = EXCP_HLT; | |
146 | } | |
147 | return s390_running_cpus; | |
148 | } | |
149 | ||
fad37673 CH |
150 | void s390_init_ipl_dev(const char *kernel_filename, |
151 | const char *kernel_cmdline, | |
152 | const char *initrd_filename) | |
153 | { | |
154 | DeviceState *dev; | |
155 | ||
156 | dev = qdev_create(NULL, "s390-ipl"); | |
157 | if (kernel_filename) { | |
158 | qdev_prop_set_string(dev, "kernel", kernel_filename); | |
159 | } | |
160 | if (initrd_filename) { | |
161 | qdev_prop_set_string(dev, "initrd", initrd_filename); | |
162 | } | |
163 | qdev_prop_set_string(dev, "cmdline", kernel_cmdline); | |
164 | qdev_init_nofail(dev); | |
165 | } | |
166 | ||
167 | void s390_init_cpus(const char *cpu_model, uint8_t *storage_keys) | |
168 | { | |
169 | int i; | |
170 | ||
171 | if (cpu_model == NULL) { | |
172 | cpu_model = "host"; | |
173 | } | |
174 | ||
175 | ipi_states = g_malloc(sizeof(S390CPU *) * smp_cpus); | |
176 | ||
177 | for (i = 0; i < smp_cpus; i++) { | |
178 | S390CPU *cpu; | |
179 | ||
180 | cpu = cpu_s390x_init(cpu_model); | |
181 | ||
182 | ipi_states[i] = cpu; | |
183 | cpu->env.halted = 1; | |
184 | cpu->env.exception_index = EXCP_HLT; | |
185 | cpu->env.storage_keys = storage_keys; | |
186 | } | |
187 | } | |
188 | ||
189 | ||
190 | void s390_create_virtio_net(BusState *bus, const char *name) | |
191 | { | |
192 | int i; | |
193 | ||
194 | for (i = 0; i < nb_nics; i++) { | |
195 | NICInfo *nd = &nd_table[i]; | |
196 | DeviceState *dev; | |
197 | ||
198 | if (!nd->model) { | |
199 | nd->model = g_strdup("virtio"); | |
200 | } | |
201 | ||
202 | if (strcmp(nd->model, "virtio")) { | |
203 | fprintf(stderr, "S390 only supports VirtIO nics\n"); | |
204 | exit(1); | |
205 | } | |
206 | ||
207 | dev = qdev_create(bus, name); | |
208 | qdev_set_nic_properties(dev, nd); | |
209 | qdev_init_nofail(dev); | |
210 | } | |
211 | } | |
212 | ||
8cb310e1 | 213 | /* PC hardware initialisation */ |
5f072e1f | 214 | static void s390_init(QEMUMachineInitArgs *args) |
8cb310e1 | 215 | { |
5f072e1f | 216 | ram_addr_t my_ram_size = args->ram_size; |
ca3dbc27 AK |
217 | MemoryRegion *sysmem = get_system_memory(); |
218 | MemoryRegion *ram = g_new(MemoryRegion, 1); | |
22486aa0 | 219 | int shift = 0; |
8d5192ee | 220 | uint8_t *storage_keys; |
326384d5 | 221 | void *virtio_region; |
a8170e5e AK |
222 | hwaddr virtio_region_len; |
223 | hwaddr virtio_region_start; | |
8cb310e1 | 224 | |
22486aa0 CB |
225 | /* s390x ram size detection needs a 16bit multiplier + an increment. So |
226 | guests > 64GB can be specified in 2MB steps etc. */ | |
227 | while ((my_ram_size >> (20 + shift)) > 65535) { | |
228 | shift++; | |
229 | } | |
230 | my_ram_size = my_ram_size >> (20 + shift) << (20 + shift); | |
231 | ||
232 | /* lets propagate the changed ram size into the global variable. */ | |
233 | ram_size = my_ram_size; | |
e249651c | 234 | |
8cb310e1 | 235 | /* get a BUS */ |
22486aa0 | 236 | s390_bus = s390_virtio_bus_init(&my_ram_size); |
559a17a1 | 237 | s390_sclp_init(); |
fad37673 CH |
238 | s390_init_ipl_dev(args->kernel_filename, args->kernel_cmdline, |
239 | args->initrd_filename); | |
8cb310e1 | 240 | |
28e942f8 CH |
241 | /* register hypercalls */ |
242 | s390_virtio_register_hcalls(); | |
243 | ||
8cb310e1 | 244 | /* allocate RAM */ |
c5705a77 AK |
245 | memory_region_init_ram(ram, "s390.ram", my_ram_size); |
246 | vmstate_register_ram_global(ram); | |
ca3dbc27 | 247 | memory_region_add_subregion(sysmem, 0, ram); |
8cb310e1 | 248 | |
326384d5 AG |
249 | /* clear virtio region */ |
250 | virtio_region_len = my_ram_size - ram_size; | |
251 | virtio_region_start = ram_size; | |
252 | virtio_region = cpu_physical_memory_map(virtio_region_start, | |
253 | &virtio_region_len, true); | |
254 | memset(virtio_region, 0, virtio_region_len); | |
255 | cpu_physical_memory_unmap(virtio_region, virtio_region_len, 1, | |
256 | virtio_region_len); | |
257 | ||
8d5192ee | 258 | /* allocate storage keys */ |
7267c094 | 259 | storage_keys = g_malloc0(my_ram_size / TARGET_PAGE_SIZE); |
8d5192ee | 260 | |
8cb310e1 | 261 | /* init CPUs */ |
fad37673 | 262 | s390_init_cpus(args->cpu_model, storage_keys); |
8cb310e1 | 263 | |
8cb310e1 | 264 | /* Create VirtIO network adapters */ |
fad37673 | 265 | s390_create_virtio_net((BusState *)s390_bus, "virtio-net-s390"); |
8cb310e1 AG |
266 | } |
267 | ||
268 | static QEMUMachine s390_machine = { | |
269 | .name = "s390-virtio", | |
270 | .alias = "s390", | |
271 | .desc = "VirtIO based S390 machine", | |
272 | .init = s390_init, | |
2d0d2837 | 273 | .block_default_type = IF_VIRTIO, |
ad0bbc56 EL |
274 | .no_cdrom = 1, |
275 | .no_floppy = 1, | |
986c5f78 GH |
276 | .no_serial = 1, |
277 | .no_parallel = 1, | |
ad0bbc56 | 278 | .no_sdcard = 1, |
cf708987 | 279 | .use_virtcon = 1, |
8cb310e1 AG |
280 | .max_cpus = 255, |
281 | .is_default = 1, | |
e4ada29e | 282 | DEFAULT_MACHINE_OPTIONS, |
8cb310e1 AG |
283 | }; |
284 | ||
285 | static void s390_machine_init(void) | |
286 | { | |
287 | qemu_register_machine(&s390_machine); | |
288 | } | |
289 | ||
290 | machine_init(s390_machine_init); |