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e674a49a CB |
1 | /* |
2 | * bootloader support | |
3 | * | |
4 | * Copyright IBM, Corp. 2012 | |
5 | * | |
6 | * Authors: | |
7 | * Christian Borntraeger <borntraeger@de.ibm.com> | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2 or (at your | |
10 | * option) any later version. See the COPYING file in the top-level directory. | |
11 | * | |
12 | */ | |
13 | ||
9615495a | 14 | #include "qemu/osdep.h" |
da34e65c | 15 | #include "qapi/error.h" |
e674a49a CB |
16 | #include "sysemu/sysemu.h" |
17 | #include "cpu.h" | |
18 | #include "elf.h" | |
19 | #include "hw/loader.h" | |
ba1509c0 DD |
20 | #include "hw/s390x/virtio-ccw.h" |
21 | #include "hw/s390x/css.h" | |
df75a4e2 | 22 | #include "ipl.h" |
e674a49a CB |
23 | |
24 | #define KERN_IMAGE_START 0x010000UL | |
25 | #define KERN_PARM_AREA 0x010480UL | |
26 | #define INITRD_START 0x800000UL | |
27 | #define INITRD_PARM_START 0x010408UL | |
28 | #define INITRD_PARM_SIZE 0x010410UL | |
29 | #define PARMFILE_START 0x001000UL | |
e674a49a CB |
30 | #define ZIPL_IMAGE_START 0x009000UL |
31 | #define IPL_PSW_MASK (PSW_MASK_32 | PSW_MASK_64) | |
32 | ||
04ca4b92 AY |
33 | static bool iplb_extended_needed(void *opaque) |
34 | { | |
35 | S390IPLState *ipl = S390_IPL(object_resolve_path(TYPE_S390_IPL, NULL)); | |
36 | ||
37 | return ipl->iplbext_migration; | |
38 | } | |
39 | ||
40 | static const VMStateDescription vmstate_iplb_extended = { | |
41 | .name = "ipl/iplb_extended", | |
42 | .version_id = 0, | |
43 | .minimum_version_id = 0, | |
44 | .needed = iplb_extended_needed, | |
45 | .fields = (VMStateField[]) { | |
46 | VMSTATE_UINT8_ARRAY(reserved_ext, IplParameterBlock, 4096 - 200), | |
47 | VMSTATE_END_OF_LIST() | |
48 | } | |
49 | }; | |
50 | ||
2e13fbe4 FZ |
51 | static const VMStateDescription vmstate_iplb = { |
52 | .name = "ipl/iplb", | |
53 | .version_id = 0, | |
54 | .minimum_version_id = 0, | |
55 | .fields = (VMStateField[]) { | |
56 | VMSTATE_UINT8_ARRAY(reserved1, IplParameterBlock, 110), | |
57 | VMSTATE_UINT16(devno, IplParameterBlock), | |
58 | VMSTATE_UINT8_ARRAY(reserved2, IplParameterBlock, 88), | |
59 | VMSTATE_END_OF_LIST() | |
04ca4b92 AY |
60 | }, |
61 | .subsections = (const VMStateDescription*[]) { | |
62 | &vmstate_iplb_extended, | |
63 | NULL | |
2e13fbe4 FZ |
64 | } |
65 | }; | |
66 | ||
67 | static const VMStateDescription vmstate_ipl = { | |
68 | .name = "ipl", | |
69 | .version_id = 0, | |
70 | .minimum_version_id = 0, | |
71 | .fields = (VMStateField[]) { | |
72 | VMSTATE_UINT64(start_addr, S390IPLState), | |
73 | VMSTATE_UINT64(bios_start_addr, S390IPLState), | |
74 | VMSTATE_STRUCT(iplb, S390IPLState, 0, vmstate_iplb, IplParameterBlock), | |
75 | VMSTATE_BOOL(iplb_valid, S390IPLState), | |
76 | VMSTATE_UINT8(cssid, S390IPLState), | |
77 | VMSTATE_UINT8(ssid, S390IPLState), | |
78 | VMSTATE_UINT16(devno, S390IPLState), | |
79 | VMSTATE_END_OF_LIST() | |
80 | } | |
81 | }; | |
e674a49a | 82 | |
feacc6c2 DH |
83 | static S390IPLState *get_ipl_device(void) |
84 | { | |
85 | return S390_IPL(object_resolve_path_type("", TYPE_S390_IPL, NULL)); | |
86 | } | |
87 | ||
d884c86d TH |
88 | static uint64_t bios_translate_addr(void *opaque, uint64_t srcaddr) |
89 | { | |
90 | uint64_t dstaddr = *(uint64_t *) opaque; | |
91 | /* | |
92 | * Assuming that our s390-ccw.img was linked for starting at address 0, | |
93 | * we can simply add the destination address for the final location | |
94 | */ | |
95 | return srcaddr + dstaddr; | |
96 | } | |
97 | ||
04fccf10 | 98 | static void s390_ipl_realize(DeviceState *dev, Error **errp) |
e674a49a CB |
99 | { |
100 | S390IPLState *ipl = S390_IPL(dev); | |
7691993c | 101 | uint64_t pentry = KERN_IMAGE_START; |
376827d4 | 102 | int kernel_size; |
e6da780d | 103 | Error *err = NULL; |
e674a49a | 104 | |
f0180f91 FZ |
105 | int bios_size; |
106 | char *bios_filename; | |
e674a49a | 107 | |
f0180f91 FZ |
108 | /* |
109 | * Always load the bios if it was enforced, | |
110 | * even if an external kernel has been defined. | |
111 | */ | |
112 | if (!ipl->kernel || ipl->enforce_bios) { | |
d884c86d TH |
113 | uint64_t fwbase = (MIN(ram_size, 0x80000000U) - 0x200000) & ~0xffffUL; |
114 | ||
e674a49a | 115 | if (bios_name == NULL) { |
d0249ce5 | 116 | bios_name = ipl->firmware; |
e674a49a CB |
117 | } |
118 | ||
119 | bios_filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, bios_name); | |
1f7de853 | 120 | if (bios_filename == NULL) { |
e6da780d | 121 | error_setg(&err, "could not find stage1 bootloader"); |
8f04e88e | 122 | goto error; |
1f7de853 DD |
123 | } |
124 | ||
d884c86d TH |
125 | bios_size = load_elf(bios_filename, bios_translate_addr, &fwbase, |
126 | &ipl->bios_start_addr, NULL, NULL, 1, | |
7ef295ea | 127 | EM_S390, 0, 0); |
d884c86d TH |
128 | if (bios_size > 0) { |
129 | /* Adjust ELF start address to final location */ | |
130 | ipl->bios_start_addr += fwbase; | |
131 | } else { | |
6e9965d4 | 132 | /* Try to load non-ELF file (e.g. s390-ccw.img) */ |
33259956 AG |
133 | bios_size = load_image_targphys(bios_filename, ZIPL_IMAGE_START, |
134 | 4096); | |
f0180f91 | 135 | ipl->bios_start_addr = ZIPL_IMAGE_START; |
33259956 | 136 | } |
e674a49a CB |
137 | g_free(bios_filename); |
138 | ||
376827d4 | 139 | if (bios_size == -1) { |
e6da780d | 140 | error_setg(&err, "could not load bootloader '%s'", bios_name); |
8f04e88e | 141 | goto error; |
e674a49a | 142 | } |
7691993c | 143 | |
f0180f91 FZ |
144 | /* default boot target is the bios */ |
145 | ipl->start_addr = ipl->bios_start_addr; | |
e674a49a | 146 | } |
7691993c | 147 | |
f0180f91 FZ |
148 | if (ipl->kernel) { |
149 | kernel_size = load_elf(ipl->kernel, NULL, NULL, &pentry, NULL, | |
7ef295ea | 150 | NULL, 1, EM_S390, 0, 0); |
f0180f91 FZ |
151 | if (kernel_size < 0) { |
152 | kernel_size = load_image_targphys(ipl->kernel, 0, ram_size); | |
153 | } | |
154 | if (kernel_size < 0) { | |
e6da780d | 155 | error_setg(&err, "could not load kernel '%s'", ipl->kernel); |
8f04e88e | 156 | goto error; |
e674a49a | 157 | } |
f0180f91 FZ |
158 | /* |
159 | * Is it a Linux kernel (starting at 0x10000)? If yes, we fill in the | |
160 | * kernel parameters here as well. Note: For old kernels (up to 3.2) | |
161 | * we can not rely on the ELF entry point - it was 0x800 (the SALIPL | |
162 | * loader) and it won't work. For this case we force it to 0x10000, too. | |
163 | */ | |
164 | if (pentry == KERN_IMAGE_START || pentry == 0x800) { | |
165 | ipl->start_addr = KERN_IMAGE_START; | |
166 | /* Overwrite parameters in the kernel image, which are "rom" */ | |
167 | strcpy(rom_ptr(KERN_PARM_AREA), ipl->cmdline); | |
168 | } else { | |
169 | ipl->start_addr = pentry; | |
e674a49a CB |
170 | } |
171 | ||
f0180f91 FZ |
172 | if (ipl->initrd) { |
173 | ram_addr_t initrd_offset; | |
174 | int initrd_size; | |
175 | ||
176 | initrd_offset = INITRD_START; | |
177 | while (kernel_size + 0x100000 > initrd_offset) { | |
178 | initrd_offset += 0x100000; | |
179 | } | |
180 | initrd_size = load_image_targphys(ipl->initrd, initrd_offset, | |
181 | ram_size - initrd_offset); | |
182 | if (initrd_size == -1) { | |
e6da780d | 183 | error_setg(&err, "could not load initrd '%s'", ipl->initrd); |
8f04e88e | 184 | goto error; |
f0180f91 | 185 | } |
e674a49a | 186 | |
f0180f91 FZ |
187 | /* |
188 | * we have to overwrite values in the kernel image, | |
189 | * which are "rom" | |
190 | */ | |
191 | stq_p(rom_ptr(INITRD_PARM_START), initrd_offset); | |
192 | stq_p(rom_ptr(INITRD_PARM_SIZE), initrd_size); | |
193 | } | |
194 | } | |
04fccf10 | 195 | qemu_register_reset(qdev_reset_all_fn, dev); |
8f04e88e | 196 | error: |
e6da780d | 197 | error_propagate(errp, err); |
e674a49a CB |
198 | } |
199 | ||
200 | static Property s390_ipl_properties[] = { | |
201 | DEFINE_PROP_STRING("kernel", S390IPLState, kernel), | |
202 | DEFINE_PROP_STRING("initrd", S390IPLState, initrd), | |
203 | DEFINE_PROP_STRING("cmdline", S390IPLState, cmdline), | |
d0249ce5 | 204 | DEFINE_PROP_STRING("firmware", S390IPLState, firmware), |
f0180f91 | 205 | DEFINE_PROP_BOOL("enforce_bios", S390IPLState, enforce_bios, false), |
04ca4b92 AY |
206 | DEFINE_PROP_BOOL("iplbext_migration", S390IPLState, iplbext_migration, |
207 | true), | |
e674a49a CB |
208 | DEFINE_PROP_END_OF_LIST(), |
209 | }; | |
210 | ||
df75a4e2 FZ |
211 | /* |
212 | * In addition to updating the iplstate, this function returns: | |
213 | * - 0 if system was ipled with external kernel | |
214 | * - -1 if no valid boot device was found | |
215 | * - ccw id of the boot device otherwise | |
216 | */ | |
db3b2566 | 217 | static uint64_t s390_update_iplstate(S390IPLState *ipl) |
df75a4e2 FZ |
218 | { |
219 | DeviceState *dev_st; | |
220 | ||
221 | if (ipl->iplb_valid) { | |
222 | ipl->cssid = 0; | |
223 | ipl->ssid = 0; | |
224 | ipl->devno = ipl->iplb.devno; | |
225 | goto out; | |
226 | } | |
227 | ||
228 | if (ipl->kernel) { | |
229 | return 0; | |
230 | } | |
231 | ||
232 | dev_st = get_boot_device(0); | |
233 | if (dev_st) { | |
234 | VirtioCcwDevice *ccw_dev = (VirtioCcwDevice *) object_dynamic_cast( | |
235 | OBJECT(qdev_get_parent_bus(dev_st)->parent), | |
236 | TYPE_VIRTIO_CCW_DEVICE); | |
237 | if (ccw_dev) { | |
238 | ipl->cssid = ccw_dev->sch->cssid; | |
239 | ipl->ssid = ccw_dev->sch->ssid; | |
240 | ipl->devno = ccw_dev->sch->devno; | |
241 | goto out; | |
242 | } | |
243 | } | |
244 | ||
245 | return -1; | |
246 | out: | |
6efd2c2a | 247 | return (uint32_t) (ipl->cssid << 24 | ipl->ssid << 16 | ipl->devno); |
df75a4e2 FZ |
248 | } |
249 | ||
feacc6c2 | 250 | void s390_ipl_update_diag308(IplParameterBlock *iplb) |
df75a4e2 | 251 | { |
feacc6c2 | 252 | S390IPLState *ipl = get_ipl_device(); |
df75a4e2 | 253 | |
feacc6c2 DH |
254 | ipl->iplb = *iplb; |
255 | ipl->iplb_valid = true; | |
df75a4e2 FZ |
256 | } |
257 | ||
258 | IplParameterBlock *s390_ipl_get_iplb(void) | |
259 | { | |
feacc6c2 | 260 | S390IPLState *ipl = get_ipl_device(); |
df75a4e2 | 261 | |
feacc6c2 | 262 | if (!ipl->iplb_valid) { |
df75a4e2 FZ |
263 | return NULL; |
264 | } | |
265 | return &ipl->iplb; | |
266 | } | |
267 | ||
e91e972c FZ |
268 | void s390_reipl_request(void) |
269 | { | |
feacc6c2 | 270 | S390IPLState *ipl = get_ipl_device(); |
e91e972c | 271 | |
e91e972c FZ |
272 | ipl->reipl_requested = true; |
273 | qemu_system_reset_request(); | |
274 | } | |
275 | ||
db3b2566 DH |
276 | void s390_ipl_prepare_cpu(S390CPU *cpu) |
277 | { | |
278 | S390IPLState *ipl = get_ipl_device(); | |
279 | ||
280 | cpu->env.psw.addr = ipl->start_addr; | |
281 | cpu->env.psw.mask = IPL_PSW_MASK; | |
282 | ||
283 | if (!ipl->kernel || ipl->iplb_valid) { | |
284 | cpu->env.psw.addr = ipl->bios_start_addr; | |
285 | cpu->env.regs[7] = s390_update_iplstate(ipl); | |
286 | } | |
287 | } | |
288 | ||
e674a49a CB |
289 | static void s390_ipl_reset(DeviceState *dev) |
290 | { | |
291 | S390IPLState *ipl = S390_IPL(dev); | |
ba1509c0 | 292 | |
e91e972c FZ |
293 | if (!ipl->reipl_requested) { |
294 | ipl->iplb_valid = false; | |
295 | } | |
296 | ipl->reipl_requested = false; | |
e674a49a CB |
297 | } |
298 | ||
299 | static void s390_ipl_class_init(ObjectClass *klass, void *data) | |
300 | { | |
301 | DeviceClass *dc = DEVICE_CLASS(klass); | |
e674a49a | 302 | |
04fccf10 | 303 | dc->realize = s390_ipl_realize; |
e674a49a CB |
304 | dc->props = s390_ipl_properties; |
305 | dc->reset = s390_ipl_reset; | |
2e13fbe4 | 306 | dc->vmsd = &vmstate_ipl; |
b4ab4572 | 307 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
e674a49a CB |
308 | } |
309 | ||
49973ebc | 310 | static const TypeInfo s390_ipl_info = { |
e674a49a | 311 | .class_init = s390_ipl_class_init, |
04fccf10 DH |
312 | .parent = TYPE_DEVICE, |
313 | .name = TYPE_S390_IPL, | |
e674a49a CB |
314 | .instance_size = sizeof(S390IPLState), |
315 | }; | |
316 | ||
317 | static void s390_ipl_register_types(void) | |
318 | { | |
319 | type_register_static(&s390_ipl_info); | |
320 | } | |
321 | ||
322 | type_init(s390_ipl_register_types) |