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Commit | Line | Data |
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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 | ||
0e60a699 AG |
52 | #define ICPT_INSTRUCTION 0x04 |
53 | #define ICPT_WAITPSW 0x1c | |
54 | #define ICPT_SOFT_INTERCEPT 0x24 | |
55 | #define ICPT_CPU_STOP 0x28 | |
56 | #define ICPT_IO 0x40 | |
57 | ||
58 | #define SIGP_RESTART 0x06 | |
59 | #define SIGP_INITIAL_CPU_RESET 0x0b | |
60 | #define SIGP_STORE_STATUS_ADDR 0x0e | |
61 | #define SIGP_SET_ARCH 0x12 | |
62 | ||
63 | #define SCLP_CMDW_READ_SCP_INFO 0x00020001 | |
64 | #define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001 | |
65 | ||
94a8d39a JK |
66 | const KVMCapabilityInfo kvm_arch_required_capabilities[] = { |
67 | KVM_CAP_LAST_INFO | |
68 | }; | |
69 | ||
cad1e282 | 70 | int kvm_arch_init(KVMState *s) |
0e60a699 AG |
71 | { |
72 | return 0; | |
73 | } | |
74 | ||
a4e3ad19 | 75 | int kvm_arch_init_vcpu(CPUS390XState *env) |
0e60a699 AG |
76 | { |
77 | int ret = 0; | |
78 | ||
79 | if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) { | |
80 | perror("cannot init reset vcpu"); | |
81 | } | |
82 | ||
83 | return ret; | |
84 | } | |
85 | ||
a4e3ad19 | 86 | void kvm_arch_reset_vcpu(CPUS390XState *env) |
0e60a699 AG |
87 | { |
88 | /* FIXME: add code to reset vcpu. */ | |
89 | } | |
90 | ||
a4e3ad19 | 91 | int kvm_arch_put_registers(CPUS390XState *env, int level) |
0e60a699 AG |
92 | { |
93 | struct kvm_regs regs; | |
94 | int ret; | |
95 | int i; | |
96 | ||
97 | ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); | |
98 | if (ret < 0) { | |
99 | return ret; | |
100 | } | |
101 | ||
102 | for (i = 0; i < 16; i++) { | |
103 | regs.gprs[i] = env->regs[i]; | |
104 | } | |
105 | ||
106 | ret = kvm_vcpu_ioctl(env, KVM_SET_REGS, ®s); | |
107 | if (ret < 0) { | |
108 | return ret; | |
109 | } | |
110 | ||
111 | env->kvm_run->psw_addr = env->psw.addr; | |
112 | env->kvm_run->psw_mask = env->psw.mask; | |
113 | ||
114 | return ret; | |
115 | } | |
116 | ||
a4e3ad19 | 117 | int kvm_arch_get_registers(CPUS390XState *env) |
0e60a699 | 118 | { |
6c33286a | 119 | int ret; |
0e60a699 AG |
120 | struct kvm_regs regs; |
121 | int i; | |
122 | ||
123 | ret = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); | |
124 | if (ret < 0) { | |
125 | return ret; | |
126 | } | |
127 | ||
128 | for (i = 0; i < 16; i++) { | |
129 | env->regs[i] = regs.gprs[i]; | |
130 | } | |
131 | ||
132 | env->psw.addr = env->kvm_run->psw_addr; | |
133 | env->psw.mask = env->kvm_run->psw_mask; | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
fdec9918 CB |
138 | /* |
139 | * Legacy layout for s390: | |
140 | * Older S390 KVM requires the topmost vma of the RAM to be | |
141 | * smaller than an system defined value, which is at least 256GB. | |
142 | * Larger systems have larger values. We put the guest between | |
143 | * the end of data segment (system break) and this value. We | |
144 | * use 32GB as a base to have enough room for the system break | |
145 | * to grow. We also have to use MAP parameters that avoid | |
146 | * read-only mapping of guest pages. | |
147 | */ | |
148 | static void *legacy_s390_alloc(ram_addr_t size) | |
149 | { | |
150 | void *mem; | |
151 | ||
152 | mem = mmap((void *) 0x800000000ULL, size, | |
153 | PROT_EXEC|PROT_READ|PROT_WRITE, | |
154 | MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0); | |
155 | if (mem == MAP_FAILED) { | |
156 | fprintf(stderr, "Allocating RAM failed\n"); | |
157 | abort(); | |
158 | } | |
159 | return mem; | |
160 | } | |
161 | ||
162 | void *kvm_arch_vmalloc(ram_addr_t size) | |
163 | { | |
164 | /* Can we use the standard allocation ? */ | |
165 | if (kvm_check_extension(kvm_state, KVM_CAP_S390_GMAP) && | |
166 | kvm_check_extension(kvm_state, KVM_CAP_S390_COW)) { | |
167 | return NULL; | |
168 | } else { | |
169 | return legacy_s390_alloc(size); | |
170 | } | |
171 | } | |
172 | ||
a4e3ad19 | 173 | int kvm_arch_insert_sw_breakpoint(CPUS390XState *env, struct kvm_sw_breakpoint *bp) |
0e60a699 AG |
174 | { |
175 | static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; | |
176 | ||
177 | if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) || | |
178 | cpu_memory_rw_debug(env, bp->pc, (uint8_t *)diag_501, 4, 1)) { | |
179 | return -EINVAL; | |
180 | } | |
181 | return 0; | |
182 | } | |
183 | ||
a4e3ad19 | 184 | int kvm_arch_remove_sw_breakpoint(CPUS390XState *env, struct kvm_sw_breakpoint *bp) |
0e60a699 AG |
185 | { |
186 | uint8_t t[4]; | |
187 | static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01}; | |
188 | ||
189 | if (cpu_memory_rw_debug(env, bp->pc, t, 4, 0)) { | |
190 | return -EINVAL; | |
191 | } else if (memcmp(t, diag_501, 4)) { | |
192 | return -EINVAL; | |
193 | } else if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 1, 1)) { | |
194 | return -EINVAL; | |
195 | } | |
196 | ||
197 | return 0; | |
198 | } | |
199 | ||
a4e3ad19 | 200 | void kvm_arch_pre_run(CPUS390XState *env, struct kvm_run *run) |
0e60a699 | 201 | { |
0e60a699 AG |
202 | } |
203 | ||
a4e3ad19 | 204 | void kvm_arch_post_run(CPUS390XState *env, struct kvm_run *run) |
0e60a699 | 205 | { |
0e60a699 AG |
206 | } |
207 | ||
a4e3ad19 | 208 | int kvm_arch_process_async_events(CPUS390XState *env) |
0af691d7 | 209 | { |
71b12d31 | 210 | return env->halted; |
0af691d7 MT |
211 | } |
212 | ||
a4e3ad19 | 213 | void kvm_s390_interrupt_internal(CPUS390XState *env, int type, uint32_t parm, |
bcec36ea | 214 | uint64_t parm64, int vm) |
0e60a699 AG |
215 | { |
216 | struct kvm_s390_interrupt kvmint; | |
217 | int r; | |
218 | ||
219 | if (!env->kvm_state) { | |
220 | return; | |
221 | } | |
222 | ||
0e60a699 AG |
223 | kvmint.type = type; |
224 | kvmint.parm = parm; | |
225 | kvmint.parm64 = parm64; | |
226 | ||
227 | if (vm) { | |
228 | r = kvm_vm_ioctl(env->kvm_state, KVM_S390_INTERRUPT, &kvmint); | |
229 | } else { | |
230 | r = kvm_vcpu_ioctl(env, KVM_S390_INTERRUPT, &kvmint); | |
231 | } | |
232 | ||
233 | if (r < 0) { | |
234 | fprintf(stderr, "KVM failed to inject interrupt\n"); | |
235 | exit(1); | |
236 | } | |
237 | } | |
238 | ||
a4e3ad19 | 239 | void kvm_s390_virtio_irq(CPUS390XState *env, int config_change, uint64_t token) |
0e60a699 AG |
240 | { |
241 | kvm_s390_interrupt_internal(env, KVM_S390_INT_VIRTIO, config_change, | |
242 | token, 1); | |
243 | } | |
244 | ||
a4e3ad19 | 245 | void kvm_s390_interrupt(CPUS390XState *env, int type, uint32_t code) |
0e60a699 AG |
246 | { |
247 | kvm_s390_interrupt_internal(env, type, code, 0, 0); | |
248 | } | |
249 | ||
a4e3ad19 | 250 | static void enter_pgmcheck(CPUS390XState *env, uint16_t code) |
0e60a699 AG |
251 | { |
252 | kvm_s390_interrupt(env, KVM_S390_PROGRAM_INT, code); | |
253 | } | |
254 | ||
a4e3ad19 | 255 | static inline void setcc(CPUS390XState *env, uint64_t cc) |
0e60a699 | 256 | { |
81f7c56c | 257 | env->kvm_run->psw_mask &= ~(3ull << 44); |
0e60a699 AG |
258 | env->kvm_run->psw_mask |= (cc & 3) << 44; |
259 | ||
260 | env->psw.mask &= ~(3ul << 44); | |
261 | env->psw.mask |= (cc & 3) << 44; | |
262 | } | |
263 | ||
a4e3ad19 | 264 | static int kvm_sclp_service_call(CPUS390XState *env, struct kvm_run *run, |
bcec36ea | 265 | uint16_t ipbh0) |
0e60a699 AG |
266 | { |
267 | uint32_t sccb; | |
268 | uint64_t code; | |
269 | int r = 0; | |
270 | ||
271 | cpu_synchronize_state(env); | |
272 | sccb = env->regs[ipbh0 & 0xf]; | |
273 | code = env->regs[(ipbh0 & 0xf0) >> 4]; | |
274 | ||
81f7c56c | 275 | r = sclp_service_call(env, sccb, code); |
9abf567d CB |
276 | if (r < 0) { |
277 | enter_pgmcheck(env, -r); | |
0e60a699 | 278 | } |
9abf567d | 279 | setcc(env, r); |
81f7c56c | 280 | |
0e60a699 AG |
281 | return 0; |
282 | } | |
283 | ||
a4e3ad19 | 284 | static int handle_priv(CPUS390XState *env, struct kvm_run *run, uint8_t ipa1) |
0e60a699 AG |
285 | { |
286 | int r = 0; | |
287 | uint16_t ipbh0 = (run->s390_sieic.ipb & 0xffff0000) >> 16; | |
288 | ||
289 | dprintf("KVM: PRIV: %d\n", ipa1); | |
290 | switch (ipa1) { | |
291 | case PRIV_SCLP_CALL: | |
bcec36ea | 292 | r = kvm_sclp_service_call(env, run, ipbh0); |
0e60a699 AG |
293 | break; |
294 | default: | |
295 | dprintf("KVM: unknown PRIV: 0x%x\n", ipa1); | |
296 | r = -1; | |
297 | break; | |
298 | } | |
299 | ||
300 | return r; | |
301 | } | |
302 | ||
a4e3ad19 | 303 | static int handle_hypercall(CPUS390XState *env, struct kvm_run *run) |
0e60a699 | 304 | { |
0e60a699 | 305 | cpu_synchronize_state(env); |
bcec36ea | 306 | env->regs[2] = s390_virtio_hypercall(env, env->regs[2], env->regs[1]); |
0e60a699 | 307 | |
bcec36ea | 308 | return 0; |
0e60a699 AG |
309 | } |
310 | ||
a4e3ad19 | 311 | static int handle_diag(CPUS390XState *env, struct kvm_run *run, int ipb_code) |
0e60a699 AG |
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 | ||
3edb8f92 | 331 | static int s390_cpu_restart(S390CPU *cpu) |
0e60a699 | 332 | { |
3edb8f92 AF |
333 | CPUS390XState *env = &cpu->env; |
334 | ||
0e60a699 | 335 | kvm_s390_interrupt(env, KVM_S390_RESTART, 0); |
854e42f3 | 336 | s390_add_running_cpu(env); |
0e60a699 AG |
337 | qemu_cpu_kick(env); |
338 | dprintf("DONE: SIGP cpu restart: %p\n", env); | |
339 | return 0; | |
340 | } | |
341 | ||
a4e3ad19 | 342 | static int s390_store_status(CPUS390XState *env, uint32_t parameter) |
0e60a699 AG |
343 | { |
344 | /* XXX */ | |
345 | fprintf(stderr, "XXX SIGP store status\n"); | |
346 | return -1; | |
347 | } | |
348 | ||
a4e3ad19 | 349 | static int s390_cpu_initial_reset(CPUS390XState *env) |
0e60a699 | 350 | { |
d5900813 AG |
351 | int i; |
352 | ||
2fb70f6f | 353 | s390_del_running_cpu(env); |
d5900813 AG |
354 | if (kvm_vcpu_ioctl(env, KVM_S390_INITIAL_RESET, NULL) < 0) { |
355 | perror("cannot init reset vcpu"); | |
356 | } | |
357 | ||
358 | /* Manually zero out all registers */ | |
359 | cpu_synchronize_state(env); | |
360 | for (i = 0; i < 16; i++) { | |
361 | env->regs[i] = 0; | |
362 | } | |
363 | ||
364 | dprintf("DONE: SIGP initial reset: %p\n", env); | |
365 | return 0; | |
0e60a699 AG |
366 | } |
367 | ||
a4e3ad19 | 368 | static int handle_sigp(CPUS390XState *env, struct kvm_run *run, uint8_t ipa1) |
0e60a699 AG |
369 | { |
370 | uint8_t order_code; | |
371 | uint32_t parameter; | |
372 | uint16_t cpu_addr; | |
373 | uint8_t t; | |
374 | int r = -1; | |
45fa769b | 375 | S390CPU *target_cpu; |
a4e3ad19 | 376 | CPUS390XState *target_env; |
0e60a699 AG |
377 | |
378 | cpu_synchronize_state(env); | |
379 | ||
380 | /* get order code */ | |
381 | order_code = run->s390_sieic.ipb >> 28; | |
382 | if (order_code > 0) { | |
383 | order_code = env->regs[order_code]; | |
384 | } | |
385 | order_code += (run->s390_sieic.ipb & 0x0fff0000) >> 16; | |
386 | ||
387 | /* get parameters */ | |
388 | t = (ipa1 & 0xf0) >> 4; | |
389 | if (!(t % 2)) { | |
390 | t++; | |
391 | } | |
392 | ||
393 | parameter = env->regs[t] & 0x7ffffe00; | |
394 | cpu_addr = env->regs[ipa1 & 0x0f]; | |
395 | ||
45fa769b AF |
396 | target_cpu = s390_cpu_addr2state(cpu_addr); |
397 | if (target_cpu == NULL) { | |
0e60a699 AG |
398 | goto out; |
399 | } | |
45fa769b | 400 | target_env = &target_cpu->env; |
0e60a699 AG |
401 | |
402 | switch (order_code) { | |
403 | case SIGP_RESTART: | |
3edb8f92 | 404 | r = s390_cpu_restart(target_cpu); |
0e60a699 AG |
405 | break; |
406 | case SIGP_STORE_STATUS_ADDR: | |
407 | r = s390_store_status(target_env, parameter); | |
408 | break; | |
409 | case SIGP_SET_ARCH: | |
410 | /* make the caller panic */ | |
411 | return -1; | |
412 | case SIGP_INITIAL_CPU_RESET: | |
413 | r = s390_cpu_initial_reset(target_env); | |
414 | break; | |
415 | default: | |
a74cdab4 | 416 | fprintf(stderr, "KVM: unknown SIGP: 0x%x\n", order_code); |
0e60a699 AG |
417 | break; |
418 | } | |
419 | ||
420 | out: | |
421 | setcc(env, r ? 3 : 0); | |
422 | return 0; | |
423 | } | |
424 | ||
a4e3ad19 | 425 | static int handle_instruction(CPUS390XState *env, struct kvm_run *run) |
0e60a699 AG |
426 | { |
427 | unsigned int ipa0 = (run->s390_sieic.ipa & 0xff00); | |
428 | uint8_t ipa1 = run->s390_sieic.ipa & 0x00ff; | |
429 | int ipb_code = (run->s390_sieic.ipb & 0x0fff0000) >> 16; | |
d7963c43 | 430 | int r = -1; |
0e60a699 AG |
431 | |
432 | dprintf("handle_instruction 0x%x 0x%x\n", run->s390_sieic.ipa, run->s390_sieic.ipb); | |
433 | switch (ipa0) { | |
434 | case IPA0_PRIV: | |
435 | r = handle_priv(env, run, ipa1); | |
436 | break; | |
437 | case IPA0_DIAG: | |
438 | r = handle_diag(env, run, ipb_code); | |
439 | break; | |
440 | case IPA0_SIGP: | |
441 | r = handle_sigp(env, run, ipa1); | |
442 | break; | |
443 | } | |
444 | ||
445 | if (r < 0) { | |
446 | enter_pgmcheck(env, 0x0001); | |
447 | } | |
359507ee | 448 | return 0; |
0e60a699 AG |
449 | } |
450 | ||
eca3ed03 CB |
451 | static bool is_special_wait_psw(CPUS390XState *env) |
452 | { | |
453 | /* signal quiesce */ | |
454 | return env->kvm_run->psw_addr == 0xfffUL; | |
455 | } | |
456 | ||
a4e3ad19 | 457 | static int handle_intercept(CPUS390XState *env) |
0e60a699 AG |
458 | { |
459 | struct kvm_run *run = env->kvm_run; | |
460 | int icpt_code = run->s390_sieic.icptcode; | |
461 | int r = 0; | |
462 | ||
81f7c56c AG |
463 | dprintf("intercept: 0x%x (at 0x%lx)\n", icpt_code, |
464 | (long)env->kvm_run->psw_addr); | |
0e60a699 AG |
465 | switch (icpt_code) { |
466 | case ICPT_INSTRUCTION: | |
467 | r = handle_instruction(env, run); | |
468 | break; | |
469 | case ICPT_WAITPSW: | |
eca3ed03 CB |
470 | if (s390_del_running_cpu(env) == 0 && |
471 | is_special_wait_psw(env)) { | |
472 | qemu_system_shutdown_request(); | |
473 | } | |
474 | r = EXCP_HALTED; | |
475 | break; | |
854e42f3 CB |
476 | case ICPT_CPU_STOP: |
477 | if (s390_del_running_cpu(env) == 0) { | |
478 | qemu_system_shutdown_request(); | |
479 | } | |
480 | r = EXCP_HALTED; | |
0e60a699 AG |
481 | break; |
482 | case ICPT_SOFT_INTERCEPT: | |
483 | fprintf(stderr, "KVM unimplemented icpt SOFT\n"); | |
484 | exit(1); | |
485 | break; | |
0e60a699 AG |
486 | case ICPT_IO: |
487 | fprintf(stderr, "KVM unimplemented icpt IO\n"); | |
488 | exit(1); | |
489 | break; | |
490 | default: | |
491 | fprintf(stderr, "Unknown intercept code: %d\n", icpt_code); | |
492 | exit(1); | |
493 | break; | |
494 | } | |
495 | ||
496 | return r; | |
497 | } | |
498 | ||
a4e3ad19 | 499 | int kvm_arch_handle_exit(CPUS390XState *env, struct kvm_run *run) |
0e60a699 AG |
500 | { |
501 | int ret = 0; | |
502 | ||
503 | switch (run->exit_reason) { | |
504 | case KVM_EXIT_S390_SIEIC: | |
505 | ret = handle_intercept(env); | |
506 | break; | |
507 | case KVM_EXIT_S390_RESET: | |
add142e0 | 508 | qemu_system_reset_request(); |
0e60a699 AG |
509 | break; |
510 | default: | |
511 | fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason); | |
512 | break; | |
513 | } | |
514 | ||
bb4ea393 JK |
515 | if (ret == 0) { |
516 | ret = EXCP_INTERRUPT; | |
bb4ea393 | 517 | } |
0e60a699 AG |
518 | return ret; |
519 | } | |
4513d923 | 520 | |
a4e3ad19 | 521 | bool kvm_arch_stop_on_emulation_error(CPUS390XState *env) |
4513d923 GN |
522 | { |
523 | return true; | |
524 | } | |
a1b87fe0 | 525 | |
a4e3ad19 | 526 | int kvm_arch_on_sigbus_vcpu(CPUS390XState *env, int code, void *addr) |
a1b87fe0 JK |
527 | { |
528 | return 1; | |
529 | } | |
530 | ||
531 | int kvm_arch_on_sigbus(int code, void *addr) | |
532 | { | |
533 | return 1; | |
534 | } |