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8cb310e1 AG |
1 | /* |
2 | * QEMU S390 virtio target | |
3 | * | |
4 | * Copyright (c) 2009 Alexander Graf <agraf@suse.de> | |
5 | * | |
6 | * This library is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2 of the License, or (at your option) any later version. | |
10 | * | |
11 | * This library is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with this library; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "hw.h" | |
21 | #include "block.h" | |
6c33286a | 22 | #include "blockdev.h" |
8cb310e1 AG |
23 | #include "sysemu.h" |
24 | #include "net.h" | |
25 | #include "boards.h" | |
26 | #include "monitor.h" | |
27 | #include "loader.h" | |
28 | #include "elf.h" | |
29 | #include "hw/virtio.h" | |
8cb310e1 AG |
30 | #include "hw/sysbus.h" |
31 | #include "kvm.h" | |
32 | ||
33 | #include "hw/s390-virtio-bus.h" | |
34 | ||
35 | //#define DEBUG_S390 | |
36 | ||
37 | #ifdef DEBUG_S390 | |
38 | #define dprintf(fmt, ...) \ | |
39 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
40 | #else | |
41 | #define dprintf(fmt, ...) \ | |
42 | do { } while (0) | |
43 | #endif | |
44 | ||
45 | #define KVM_S390_VIRTIO_NOTIFY 0 | |
46 | #define KVM_S390_VIRTIO_RESET 1 | |
47 | #define KVM_S390_VIRTIO_SET_STATUS 2 | |
48 | ||
49 | #define KERN_IMAGE_START 0x010000UL | |
50 | #define KERN_PARM_AREA 0x010480UL | |
51 | #define INITRD_START 0x800000UL | |
52 | #define INITRD_PARM_START 0x010408UL | |
53 | #define INITRD_PARM_SIZE 0x010410UL | |
54 | #define PARMFILE_START 0x001000UL | |
55 | ||
fe270d04 AG |
56 | #define ZIPL_START 0x009000UL |
57 | #define ZIPL_LOAD_ADDR 0x009000UL | |
58 | #define ZIPL_FILENAME "s390-zipl.rom" | |
59 | ||
8cb310e1 AG |
60 | #define MAX_BLK_DEVS 10 |
61 | ||
62 | static VirtIOS390Bus *s390_bus; | |
63 | static CPUState **ipi_states; | |
64 | ||
65 | void irq_info(Monitor *mon); | |
66 | void pic_info(Monitor *mon); | |
67 | ||
68 | void irq_info(Monitor *mon) | |
69 | { | |
70 | } | |
71 | ||
72 | void pic_info(Monitor *mon) | |
73 | { | |
74 | } | |
75 | ||
76 | CPUState *s390_cpu_addr2state(uint16_t cpu_addr) | |
77 | { | |
78 | if (cpu_addr >= smp_cpus) { | |
79 | return NULL; | |
80 | } | |
81 | ||
82 | return ipi_states[cpu_addr]; | |
83 | } | |
84 | ||
85 | int s390_virtio_hypercall(CPUState *env) | |
86 | { | |
87 | int r = 0, i; | |
88 | target_ulong mem = env->regs[2]; | |
89 | ||
90 | dprintf("KVM hypercall: %ld\n", env->regs[1]); | |
91 | switch (env->regs[1]) { | |
92 | case KVM_S390_VIRTIO_NOTIFY: | |
93 | if (mem > ram_size) { | |
94 | VirtIOS390Device *dev = s390_virtio_bus_find_vring(s390_bus, | |
95 | mem, &i); | |
96 | if (dev) { | |
97 | virtio_queue_notify(dev->vdev, i); | |
98 | } else { | |
99 | r = -EINVAL; | |
100 | } | |
101 | } else { | |
102 | /* Early printk */ | |
103 | } | |
104 | break; | |
105 | case KVM_S390_VIRTIO_RESET: | |
106 | { | |
baf0b55a AG |
107 | VirtIOS390Device *dev; |
108 | ||
109 | dev = s390_virtio_bus_find_mem(s390_bus, mem); | |
110 | virtio_reset(dev->vdev); | |
111 | s390_virtio_device_sync(dev); | |
8cb310e1 AG |
112 | break; |
113 | } | |
114 | case KVM_S390_VIRTIO_SET_STATUS: | |
115 | { | |
116 | VirtIOS390Device *dev; | |
117 | ||
118 | dev = s390_virtio_bus_find_mem(s390_bus, mem); | |
119 | if (dev) { | |
120 | s390_virtio_device_update_status(dev); | |
121 | } else { | |
122 | r = -EINVAL; | |
123 | } | |
124 | break; | |
125 | } | |
126 | default: | |
127 | r = -EINVAL; | |
128 | break; | |
129 | } | |
130 | ||
131 | env->regs[2] = r; | |
132 | return 0; | |
133 | } | |
134 | ||
135 | /* PC hardware initialisation */ | |
136 | static void s390_init(ram_addr_t ram_size, | |
137 | const char *boot_device, | |
138 | const char *kernel_filename, | |
139 | const char *kernel_cmdline, | |
140 | const char *initrd_filename, | |
141 | const char *cpu_model) | |
142 | { | |
143 | CPUState *env = NULL; | |
144 | ram_addr_t ram_addr; | |
145 | ram_addr_t kernel_size = 0; | |
146 | ram_addr_t initrd_offset; | |
147 | ram_addr_t initrd_size = 0; | |
148 | int i; | |
149 | ||
e249651c AG |
150 | /* XXX we only work on KVM for now */ |
151 | ||
152 | if (!kvm_enabled()) { | |
153 | fprintf(stderr, "The S390 target only works with KVM enabled\n"); | |
154 | exit(1); | |
155 | } | |
156 | ||
8cb310e1 AG |
157 | /* get a BUS */ |
158 | s390_bus = s390_virtio_bus_init(&ram_size); | |
159 | ||
160 | /* allocate RAM */ | |
1724f049 | 161 | ram_addr = qemu_ram_alloc(NULL, "s390.ram", ram_size); |
8cb310e1 AG |
162 | cpu_register_physical_memory(0, ram_size, ram_addr); |
163 | ||
164 | /* init CPUs */ | |
165 | if (cpu_model == NULL) { | |
166 | cpu_model = "host"; | |
167 | } | |
168 | ||
169 | ipi_states = qemu_malloc(sizeof(CPUState *) * smp_cpus); | |
170 | ||
171 | for (i = 0; i < smp_cpus; i++) { | |
172 | CPUState *tmp_env; | |
173 | ||
174 | tmp_env = cpu_init(cpu_model); | |
175 | if (!env) { | |
176 | env = tmp_env; | |
177 | } | |
178 | ipi_states[i] = tmp_env; | |
179 | tmp_env->halted = 1; | |
180 | tmp_env->exception_index = EXCP_HLT; | |
181 | } | |
182 | ||
183 | env->halted = 0; | |
184 | env->exception_index = 0; | |
185 | ||
186 | if (kernel_filename) { | |
187 | kernel_size = load_image(kernel_filename, qemu_get_ram_ptr(0)); | |
188 | ||
189 | if (lduw_phys(KERN_IMAGE_START) != 0x0dd0) { | |
190 | fprintf(stderr, "Specified image is not an s390 boot image\n"); | |
191 | exit(1); | |
192 | } | |
193 | ||
8cb310e1 | 194 | env->psw.addr = KERN_IMAGE_START; |
0435d393 | 195 | env->psw.mask = 0x0000000180000000ULL; |
fe270d04 AG |
196 | } else { |
197 | ram_addr_t bios_size = 0; | |
198 | char *bios_filename; | |
199 | ||
200 | /* Load zipl bootloader */ | |
201 | if (bios_name == NULL) { | |
202 | bios_name = ZIPL_FILENAME; | |
203 | } | |
204 | ||
205 | bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); | |
206 | bios_size = load_image(bios_filename, qemu_get_ram_ptr(ZIPL_LOAD_ADDR)); | |
207 | ||
208 | if ((long)bios_size < 0) { | |
209 | hw_error("could not load bootloader '%s'\n", bios_name); | |
210 | } | |
211 | ||
212 | if (bios_size > 4096) { | |
213 | hw_error("stage1 bootloader is > 4k\n"); | |
214 | } | |
215 | ||
216 | env->psw.addr = ZIPL_START; | |
217 | env->psw.mask = 0x0000000180000000ULL; | |
8cb310e1 AG |
218 | } |
219 | ||
220 | if (initrd_filename) { | |
221 | initrd_offset = INITRD_START; | |
222 | while (kernel_size + 0x100000 > initrd_offset) { | |
223 | initrd_offset += 0x100000; | |
224 | } | |
225 | initrd_size = load_image(initrd_filename, qemu_get_ram_ptr(initrd_offset)); | |
226 | ||
227 | stq_phys(INITRD_PARM_START, initrd_offset); | |
228 | stq_phys(INITRD_PARM_SIZE, initrd_size); | |
229 | } | |
230 | ||
231 | if (kernel_cmdline) { | |
232 | cpu_physical_memory_rw(KERN_PARM_AREA, (uint8_t *)kernel_cmdline, | |
233 | strlen(kernel_cmdline), 1); | |
234 | } | |
235 | ||
8cb310e1 AG |
236 | /* Create VirtIO network adapters */ |
237 | for(i = 0; i < nb_nics; i++) { | |
238 | NICInfo *nd = &nd_table[i]; | |
239 | DeviceState *dev; | |
240 | ||
241 | if (!nd->model) { | |
5a2b3fc5 | 242 | nd->model = qemu_strdup("virtio"); |
8cb310e1 AG |
243 | } |
244 | ||
245 | if (strcmp(nd->model, "virtio")) { | |
246 | fprintf(stderr, "S390 only supports VirtIO nics\n"); | |
247 | exit(1); | |
248 | } | |
249 | ||
250 | dev = qdev_create((BusState *)s390_bus, "virtio-net-s390"); | |
251 | qdev_set_nic_properties(dev, nd); | |
252 | qdev_init_nofail(dev); | |
253 | } | |
254 | ||
255 | /* Create VirtIO disk drives */ | |
256 | for(i = 0; i < MAX_BLK_DEVS; i++) { | |
257 | DriveInfo *dinfo; | |
258 | DeviceState *dev; | |
259 | ||
260 | dinfo = drive_get(IF_IDE, 0, i); | |
261 | if (!dinfo) { | |
262 | continue; | |
263 | } | |
264 | ||
265 | dev = qdev_create((BusState *)s390_bus, "virtio-blk-s390"); | |
18846dee | 266 | qdev_prop_set_drive_nofail(dev, "drive", dinfo->bdrv); |
8cb310e1 AG |
267 | qdev_init_nofail(dev); |
268 | } | |
269 | } | |
270 | ||
271 | static QEMUMachine s390_machine = { | |
272 | .name = "s390-virtio", | |
273 | .alias = "s390", | |
274 | .desc = "VirtIO based S390 machine", | |
275 | .init = s390_init, | |
986c5f78 GH |
276 | .no_serial = 1, |
277 | .no_parallel = 1, | |
cf708987 | 278 | .use_virtcon = 1, |
986c5f78 | 279 | .no_vga = 1, |
8cb310e1 AG |
280 | .max_cpus = 255, |
281 | .is_default = 1, | |
282 | }; | |
283 | ||
284 | static void s390_machine_init(void) | |
285 | { | |
286 | qemu_register_machine(&s390_machine); | |
287 | } | |
288 | ||
289 | machine_init(s390_machine_init); |