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0e60a699 AG |
1 | /* |
2 | * QEMU S390x KVM implementation | |
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 <sys/types.h> | |
21 | #include <sys/ioctl.h> | |
22 | #include <sys/mman.h> | |
23 | ||
24 | #include <linux/kvm.h> | |
25 | #include <asm/ptrace.h> | |
26 | ||
27 | #include "qemu-common.h" | |
28 | #include "qemu-timer.h" | |
29 | #include "sysemu.h" | |
30 | #include "kvm.h" | |
31 | #include "cpu.h" | |
32 | #include "device_tree.h" | |
33 | ||
34 | /* #define DEBUG_KVM */ | |
35 | ||
36 | #ifdef DEBUG_KVM | |
37 | #define dprintf(fmt, ...) \ | |
38 | do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0) | |
39 | #else | |
40 | #define dprintf(fmt, ...) \ | |
41 | do { } while (0) | |
42 | #endif | |
43 | ||
44 | #define IPA0_DIAG 0x8300 | |
45 | #define IPA0_SIGP 0xae00 | |
46 | #define IPA0_PRIV 0xb200 | |
47 | ||
48 | #define PRIV_SCLP_CALL 0x20 | |
49 | #define DIAG_KVM_HYPERCALL 0x500 | |
50 | #define DIAG_KVM_BREAKPOINT 0x501 | |
51 | ||
52 | #define SCP_LENGTH 0x00 | |
53 | #define SCP_FUNCTION_CODE 0x02 | |
54 | #define SCP_CONTROL_MASK 0x03 | |
55 | #define SCP_RESPONSE_CODE 0x06 | |
56 | #define SCP_MEM_CODE 0x08 | |
57 | #define SCP_INCREMENT 0x0a | |
58 | ||
59 | #define ICPT_INSTRUCTION 0x04 | |
60 | #define ICPT_WAITPSW 0x1c | |
61 | #define ICPT_SOFT_INTERCEPT 0x24 | |
62 | #define ICPT_CPU_STOP 0x28 | |
63 | #define ICPT_IO 0x40 | |
64 | ||
65 | #define SIGP_RESTART 0x06 | |
66 | #define SIGP_INITIAL_CPU_RESET 0x0b | |
67 | #define SIGP_STORE_STATUS_ADDR 0x0e | |
68 | #define SIGP_SET_ARCH 0x12 | |
69 | ||
70 | #define SCLP_CMDW_READ_SCP_INFO 0x00020001 | |
71 | #define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 | |
72 | ||
94a8d39a JK |
73 | const KVMCapabilityInfo kvm_arch_required_capabilities[] = { |
74 | KVM_CAP_LAST_INFO | |
75 | }; | |
76 | ||
cad1e282 | 77 | int kvm_arch_init(KVMState *s) |
0e60a699 AG |
78 | { |
79 | return 0; | |
80 | } | |
81 | ||
82 | int kvm_arch_init_vcpu(CPUState *env) | |
83 | { | |
84 | int ret = 0; | |
85 | ||
86 | if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) { | |
87 | perror("cannot init reset vcpu"); | |
88 | } | |
89 | ||
90 | return ret; | |
91 | } | |
92 | ||
93 | void kvm_arch_reset_vcpu(CPUState *env) | |
94 | { | |
95 | /* FIXME: add code to reset vcpu. */ | |
96 | } | |
97 | ||
ea375f9a | 98 | int kvm_arch_put_registers(CPUState *env, int level) |
0e60a699 AG |
99 | { |
100 | struct kvm_regs regs; | |
101 | int ret; | |
102 | int i; | |
103 | ||
104 | ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); | |
105 | if (ret < 0) { | |
106 | return ret; | |
107 | } | |
108 | ||
109 | for (i = 0; i < 16; i++) { | |
110 | regs.gprs[i] = env->regs[i]; | |
111 | } | |
112 | ||
113 | ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, ®s); | |
114 | if (ret < 0) { | |
115 | return ret; | |
116 | } | |
117 | ||
118 | env->kvm_run->psw_addr = env->psw.addr; | |
119 | env->kvm_run->psw_mask = env->psw.mask; | |
120 | ||
121 | return ret; | |
122 | } | |
123 | ||
124 | int kvm_arch_get_registers(CPUState *env) | |
125 | { | |
6c33286a | 126 | int ret; |
0e60a699 AG |
127 | struct kvm_regs regs; |
128 | int i; | |
129 | ||
130 | ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); | |
131 | if (ret < 0) { | |
132 | return ret; | |
133 | } | |
134 | ||
135 | for (i = 0; i < 16; i++) { | |
136 | env->regs[i] = regs.gprs[i]; | |
137 | } | |
138 | ||
139 | env->psw.addr = env->kvm_run->psw_addr; | |
140 | env->psw.mask = env->kvm_run->psw_mask; | |
141 | ||
142 | return 0; | |
143 | } | |
144 | ||
145 | int kvm_arch_insert_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp) | |
146 | { | |
147 | static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; | |
148 | ||
149 | if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) || | |
150 | cpu_memory_rw_debug(env, bp->pc, (uint8_t *)diag_501, 4, 1)) { | |
151 | return -EINVAL; | |
152 | } | |
153 | return 0; | |
154 | } | |
155 | ||
156 | int kvm_arch_remove_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp) | |
157 | { | |
158 | uint8_t t[4]; | |
159 | static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; | |
160 | ||
161 | if (cpu_memory_rw_debug(env, bp->pc, t, 4, 0)) { | |
162 | return -EINVAL; | |
163 | } else if (memcmp(t, diag_501, 4)) { | |
164 | return -EINVAL; | |
165 | } else if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) { | |
166 | return -EINVAL; | |
167 | } | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
7a39fe58 | 172 | void kvm_arch_pre_run(CPUState *env, struct kvm_run *run) |
0e60a699 | 173 | { |
0e60a699 AG |
174 | } |
175 | ||
7a39fe58 | 176 | void kvm_arch_post_run(CPUState *env, struct kvm_run *run) |
0e60a699 | 177 | { |
0e60a699 AG |
178 | } |
179 | ||
99036865 | 180 | int kvm_arch_process_async_events(CPUState *env) |
0af691d7 MT |
181 | { |
182 | return 0; | |
183 | } | |
184 | ||
0e60a699 AG |
185 | static void kvm_s390_interrupt_internal(CPUState *env, int type, uint32_t parm, |
186 | uint64_t parm64, int vm) | |
187 | { | |
188 | struct kvm_s390_interrupt kvmint; | |
189 | int r; | |
190 | ||
191 | if (!env->kvm_state) { | |
192 | return; | |
193 | } | |
194 | ||
195 | env->halted = 0; | |
ee0dc6d3 | 196 | env->exception_index = -1; |
94ad5b00 | 197 | qemu_cpu_kick(env); |
0e60a699 AG |
198 | |
199 | kvmint.type = type; | |
200 | kvmint.parm = parm; | |
201 | kvmint.parm64 = parm64; | |
202 | ||
203 | if (vm) { | |
204 | r = kvm_vm_ioctl(env->kvm_state, KVM_S390_INTERRUPT, &kvmint); | |
205 | } else { | |
206 | r = kvm_vcpu_ioctl(env, KVM_S390_INTERRUPT, &kvmint); | |
207 | } | |
208 | ||
209 | if (r < 0) { | |
210 | fprintf(stderr, "KVM failed to inject interrupt\n"); | |
211 | exit(1); | |
212 | } | |
213 | } | |
214 | ||
215 | void kvm_s390_virtio_irq(CPUState *env, int config_change, uint64_t token) | |
216 | { | |
217 | kvm_s390_interrupt_internal(env, KVM_S390_INT_VIRTIO, config_change, | |
218 | token, 1); | |
219 | } | |
220 | ||
221 | static void kvm_s390_interrupt(CPUState *env, int type, uint32_t code) | |
222 | { | |
223 | kvm_s390_interrupt_internal(env, type, code, 0, 0); | |
224 | } | |
225 | ||
226 | static void enter_pgmcheck(CPUState *env, uint16_t code) | |
227 | { | |
228 | kvm_s390_interrupt(env, KVM_S390_PROGRAM_INT, code); | |
229 | } | |
230 | ||
231 | static void setcc(CPUState *env, uint64_t cc) | |
232 | { | |
233 | env->kvm_run->psw_mask &= ~(3ul << 44); | |
234 | env->kvm_run->psw_mask |= (cc & 3) << 44; | |
235 | ||
236 | env->psw.mask &= ~(3ul << 44); | |
237 | env->psw.mask |= (cc & 3) << 44; | |
238 | } | |
239 | ||
240 | static int sclp_service_call(CPUState *env, struct kvm_run *run, uint16_t ipbh0) | |
241 | { | |
242 | uint32_t sccb; | |
243 | uint64_t code; | |
244 | int r = 0; | |
245 | ||
246 | cpu_synchronize_state(env); | |
247 | sccb = env->regs[ipbh0 & 0xf]; | |
248 | code = env->regs[(ipbh0 & 0xf0) >> 4]; | |
249 | ||
250 | dprintf("sclp(0x%x, 0x%lx)\n", sccb, code); | |
251 | ||
252 | if (sccb & ~0x7ffffff8ul) { | |
253 | fprintf(stderr, "KVM: invalid sccb address 0x%x\n", sccb); | |
254 | r = -1; | |
255 | goto out; | |
256 | } | |
257 | ||
258 | switch(code) { | |
259 | case SCLP_CMDW_READ_SCP_INFO: | |
260 | case SCLP_CMDW_READ_SCP_INFO_FORCED: | |
261 | stw_phys(sccb + SCP_MEM_CODE, ram_size >> 20); | |
262 | stb_phys(sccb + SCP_INCREMENT, 1); | |
263 | stw_phys(sccb + SCP_RESPONSE_CODE, 0x10); | |
264 | setcc(env, 0); | |
265 | ||
266 | kvm_s390_interrupt_internal(env, KVM_S390_INT_SERVICE, | |
267 | sccb & ~3, 0, 1); | |
268 | break; | |
269 | default: | |
270 | dprintf("KVM: invalid sclp call 0x%x / 0x%lx\n", sccb, code); | |
271 | r = -1; | |
272 | break; | |
273 | } | |
274 | ||
275 | out: | |
276 | if (r < 0) { | |
277 | setcc(env, 3); | |
278 | } | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static int handle_priv(CPUState *env, struct kvm_run *run, uint8_t ipa1) | |
283 | { | |
284 | int r = 0; | |
285 | uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16; | |
286 | ||
287 | dprintf("KVM: PRIV: %d\n", ipa1); | |
288 | switch (ipa1) { | |
289 | case PRIV_SCLP_CALL: | |
290 | r = sclp_service_call(env, run, ipbh0); | |
291 | break; | |
292 | default: | |
293 | dprintf("KVM: unknown PRIV: 0x%x\n", ipa1); | |
294 | r = -1; | |
295 | break; | |
296 | } | |
297 | ||
298 | return r; | |
299 | } | |
300 | ||
301 | static int handle_hypercall(CPUState *env, struct kvm_run *run) | |
302 | { | |
303 | int r; | |
304 | ||
305 | cpu_synchronize_state(env); | |
306 | r = s390_virtio_hypercall(env); | |
0e60a699 AG |
307 | |
308 | return r; | |
309 | } | |
310 | ||
311 | static int handle_diag(CPUState *env, struct kvm_run *run, int ipb_code) | |
312 | { | |
313 | int r = 0; | |
314 | ||
315 | switch (ipb_code) { | |
316 | case DIAG_KVM_HYPERCALL: | |
317 | r = handle_hypercall(env, run); | |
318 | break; | |
319 | case DIAG_KVM_BREAKPOINT: | |
320 | sleep(10); | |
321 | break; | |
322 | default: | |
323 | dprintf("KVM: unknown DIAG: 0x%x\n", ipb_code); | |
324 | r = -1; | |
325 | break; | |
326 | } | |
327 | ||
328 | return r; | |
329 | } | |
330 | ||
331 | static int s390_cpu_restart(CPUState *env) | |
332 | { | |
333 | kvm_s390_interrupt(env, KVM_S390_RESTART, 0); | |
334 | env->halted = 0; | |
ee0dc6d3 | 335 | env->exception_index = -1; |
0e60a699 AG |
336 | qemu_cpu_kick(env); |
337 | dprintf("DONE: SIGP cpu restart: %p\n", env); | |
338 | return 0; | |
339 | } | |
340 | ||
341 | static int s390_store_status(CPUState *env, uint32_t parameter) | |
342 | { | |
343 | /* XXX */ | |
344 | fprintf(stderr, "XXX SIGP store status\n"); | |
345 | return -1; | |
346 | } | |
347 | ||
348 | static int s390_cpu_initial_reset(CPUState *env) | |
349 | { | |
d5900813 AG |
350 | int i; |
351 | ||
352 | if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) { | |
353 | perror("cannot init reset vcpu"); | |
354 | } | |
355 | ||
356 | /* Manually zero out all registers */ | |
357 | cpu_synchronize_state(env); | |
358 | for (i = 0; i < 16; i++) { | |
359 | env->regs[i] = 0; | |
360 | } | |
361 | ||
362 | dprintf("DONE: SIGP initial reset: %p\n", env); | |
363 | return 0; | |
0e60a699 AG |
364 | } |
365 | ||
366 | static int handle_sigp(CPUState *env, struct kvm_run *run, uint8_t ipa1) | |
367 | { | |
368 | uint8_t order_code; | |
369 | uint32_t parameter; | |
370 | uint16_t cpu_addr; | |
371 | uint8_t t; | |
372 | int r = -1; | |
373 | CPUState *target_env; | |
374 | ||
375 | cpu_synchronize_state(env); | |
376 | ||
377 | /* get order code */ | |
378 | order_code = run->s390_sieic.ipb >> 28; | |
379 | if (order_code > 0) { | |
380 | order_code = env->regs[order_code]; | |
381 | } | |
382 | order_code += (run->s390_sieic.ipb & 0x0fff0000) >> 16; | |
383 | ||
384 | /* get parameters */ | |
385 | t = (ipa1 & 0xf0) >> 4; | |
386 | if (!(t % 2)) { | |
387 | t++; | |
388 | } | |
389 | ||
390 | parameter = env->regs[t] & 0x7ffffe00; | |
391 | cpu_addr = env->regs[ipa1 & 0x0f]; | |
392 | ||
393 | target_env = s390_cpu_addr2state(cpu_addr); | |
394 | if (!target_env) { | |
395 | goto out; | |
396 | } | |
397 | ||
398 | switch (order_code) { | |
399 | case SIGP_RESTART: | |
400 | r = s390_cpu_restart(target_env); | |
401 | break; | |
402 | case SIGP_STORE_STATUS_ADDR: | |
403 | r = s390_store_status(target_env, parameter); | |
404 | break; | |
405 | case SIGP_SET_ARCH: | |
406 | /* make the caller panic */ | |
407 | return -1; | |
408 | case SIGP_INITIAL_CPU_RESET: | |
409 | r = s390_cpu_initial_reset(target_env); | |
410 | break; | |
411 | default: | |
412 | fprintf(stderr, "KVM: unknown SIGP: 0x%x\n", ipa1); | |
413 | break; | |
414 | } | |
415 | ||
416 | out: | |
417 | setcc(env, r ? 3 : 0); | |
418 | return 0; | |
419 | } | |
420 | ||
421 | static int handle_instruction(CPUState *env, struct kvm_run *run) | |
422 | { | |
423 | unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00); | |
424 | uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff; | |
425 | int ipb_code = (run->s390_sieic.ipb & 0x0fff0000) >> 16; | |
d7963c43 | 426 | int r = -1; |
0e60a699 AG |
427 | |
428 | dprintf("handle_instruction 0x%x 0x%x\n", run->s390_sieic.ipa, run->s390_sieic.ipb); | |
429 | switch (ipa0) { | |
430 | case IPA0_PRIV: | |
431 | r = handle_priv(env, run, ipa1); | |
432 | break; | |
433 | case IPA0_DIAG: | |
434 | r = handle_diag(env, run, ipb_code); | |
435 | break; | |
436 | case IPA0_SIGP: | |
437 | r = handle_sigp(env, run, ipa1); | |
438 | break; | |
439 | } | |
440 | ||
441 | if (r < 0) { | |
442 | enter_pgmcheck(env, 0x0001); | |
443 | } | |
444 | return r; | |
445 | } | |
446 | ||
447 | static int handle_intercept(CPUState *env) | |
448 | { | |
449 | struct kvm_run *run = env->kvm_run; | |
450 | int icpt_code = run->s390_sieic.icptcode; | |
451 | int r = 0; | |
452 | ||
453 | dprintf("intercept: 0x%x (at 0x%lx)\n", icpt_code, env->kvm_run->psw_addr); | |
454 | switch (icpt_code) { | |
455 | case ICPT_INSTRUCTION: | |
456 | r = handle_instruction(env, run); | |
457 | break; | |
458 | case ICPT_WAITPSW: | |
459 | /* XXX What to do on system shutdown? */ | |
460 | env->halted = 1; | |
461 | env->exception_index = EXCP_HLT; | |
462 | break; | |
463 | case ICPT_SOFT_INTERCEPT: | |
464 | fprintf(stderr, "KVM unimplemented icpt SOFT\n"); | |
465 | exit(1); | |
466 | break; | |
467 | case ICPT_CPU_STOP: | |
468 | qemu_system_shutdown_request(); | |
469 | break; | |
470 | case ICPT_IO: | |
471 | fprintf(stderr, "KVM unimplemented icpt IO\n"); | |
472 | exit(1); | |
473 | break; | |
474 | default: | |
475 | fprintf(stderr, "Unknown intercept code: %d\n", icpt_code); | |
476 | exit(1); | |
477 | break; | |
478 | } | |
479 | ||
480 | return r; | |
481 | } | |
482 | ||
483 | int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run) | |
484 | { | |
485 | int ret = 0; | |
486 | ||
487 | switch (run->exit_reason) { | |
488 | case KVM_EXIT_S390_SIEIC: | |
489 | ret = handle_intercept(env); | |
490 | break; | |
491 | case KVM_EXIT_S390_RESET: | |
492 | fprintf(stderr, "RESET not implemented\n"); | |
493 | exit(1); | |
494 | break; | |
495 | default: | |
496 | fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason); | |
497 | break; | |
498 | } | |
499 | ||
bb4ea393 JK |
500 | if (ret == 0) { |
501 | ret = EXCP_INTERRUPT; | |
502 | } else if (ret > 0) { | |
503 | ret = 0; | |
504 | } | |
0e60a699 AG |
505 | return ret; |
506 | } | |
4513d923 GN |
507 | |
508 | bool kvm_arch_stop_on_emulation_error(CPUState *env) | |
509 | { | |
510 | return true; | |
511 | } | |
a1b87fe0 JK |
512 | |
513 | int kvm_arch_on_sigbus_vcpu(CPUState *env, int code, void *addr) | |
514 | { | |
515 | return 1; | |
516 | } | |
517 | ||
518 | int kvm_arch_on_sigbus(int code, void *addr) | |
519 | { | |
520 | return 1; | |
521 | } |