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28#include "qemu/osdep.h"
29#include "qemu/log.h"
30#include "qemu/error-report.h"
31#include "sysemu/sysemu.h"
32#include "sysemu/device_tree.h"
33#include "sysemu/cpus.h"
34#include "sysemu/hw_accel.h"
35#include "sysemu/runstate.h"
36#include "kvm_ppc.h"
37
38#include "hw/ppc/spapr.h"
39#include "hw/ppc/spapr_vio.h"
40#include "hw/ppc/spapr_rtas.h"
41#include "hw/ppc/spapr_cpu_core.h"
42#include "hw/ppc/ppc.h"
43
44#include <libfdt.h>
45#include "hw/ppc/spapr_drc.h"
46#include "qemu/cutils.h"
47#include "trace.h"
48#include "hw/ppc/fdt.h"
49#include "target/ppc/mmu-hash64.h"
50#include "target/ppc/mmu-book3s-v3.h"
51#include "migration/blocker.h"
52#include "helper_regs.h"
53
54static void rtas_display_character(PowerPCCPU *cpu, SpaprMachineState *spapr,
55 uint32_t token, uint32_t nargs,
56 target_ulong args,
57 uint32_t nret, target_ulong rets)
58{
59 uint8_t c = rtas_ld(args, 0);
60 SpaprVioDevice *sdev = vty_lookup(spapr, 0);
61
62 if (!sdev) {
63 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
64 } else {
65 vty_putchars(sdev, &c, sizeof(c));
66 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
67 }
68}
69
70static void rtas_power_off(PowerPCCPU *cpu, SpaprMachineState *spapr,
71 uint32_t token, uint32_t nargs, target_ulong args,
72 uint32_t nret, target_ulong rets)
73{
74 if (nargs != 2 || nret != 1) {
75 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
76 return;
77 }
78 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
79 cpu_stop_current();
80 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
81}
82
83static void rtas_system_reboot(PowerPCCPU *cpu, SpaprMachineState *spapr,
84 uint32_t token, uint32_t nargs,
85 target_ulong args,
86 uint32_t nret, target_ulong rets)
87{
88 if (nargs != 0 || nret != 1) {
89 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
90 return;
91 }
92 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
93 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
94}
95
96static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
97 SpaprMachineState *spapr,
98 uint32_t token, uint32_t nargs,
99 target_ulong args,
100 uint32_t nret, target_ulong rets)
101{
102 target_ulong id;
103 PowerPCCPU *cpu;
104
105 if (nargs != 1 || nret != 2) {
106 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
107 return;
108 }
109
110 id = rtas_ld(args, 0);
111 cpu = spapr_find_cpu(id);
112 if (cpu != NULL) {
113 if (CPU(cpu)->halted) {
114 rtas_st(rets, 1, 0);
115 } else {
116 rtas_st(rets, 1, 2);
117 }
118
119 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
120 return;
121 }
122
123
124 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
125}
126
127static void rtas_start_cpu(PowerPCCPU *callcpu, SpaprMachineState *spapr,
128 uint32_t token, uint32_t nargs,
129 target_ulong args,
130 uint32_t nret, target_ulong rets)
131{
132 target_ulong id, start, r3;
133 PowerPCCPU *newcpu;
134 CPUPPCState *env;
135 target_ulong lpcr;
136 target_ulong caller_lpcr;
137
138 if (nargs != 3 || nret != 1) {
139 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
140 return;
141 }
142
143 id = rtas_ld(args, 0);
144 start = rtas_ld(args, 1);
145 r3 = rtas_ld(args, 2);
146
147 newcpu = spapr_find_cpu(id);
148 if (!newcpu) {
149
150 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
151 return;
152 }
153
154 env = &newcpu->env;
155
156 if (!CPU(newcpu)->halted) {
157 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
158 return;
159 }
160
161 cpu_synchronize_state(CPU(newcpu));
162
163 env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
164 hreg_compute_hflags(env);
165
166 caller_lpcr = callcpu->env.spr[SPR_LPCR];
167 lpcr = env->spr[SPR_LPCR];
168
169
170 lpcr = (lpcr & ~LPCR_ILE) | (caller_lpcr & LPCR_ILE);
171
172
173 lpcr = (lpcr & ~LPCR_AIL) | (caller_lpcr & LPCR_AIL);
174
175 if (env->mmu_model == POWERPC_MMU_3_00) {
176
177
178
179
180 if (ppc64_v3_radix(callcpu)) {
181 lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR;
182 } else {
183 lpcr &= ~(LPCR_UPRT | LPCR_GTSE | LPCR_HR);
184 }
185 env->spr[SPR_PSSCR] &= ~PSSCR_EC;
186 }
187 ppc_store_lpcr(newcpu, lpcr);
188
189
190
191
192
193
194 newcpu->env.tb_env->tb_offset = callcpu->env.tb_env->tb_offset;
195
196 spapr_cpu_set_entry_state(newcpu, start, 0, r3, 0);
197
198 qemu_cpu_kick(CPU(newcpu));
199
200 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
201}
202
203static void rtas_stop_self(PowerPCCPU *cpu, SpaprMachineState *spapr,
204 uint32_t token, uint32_t nargs,
205 target_ulong args,
206 uint32_t nret, target_ulong rets)
207{
208 CPUState *cs = CPU(cpu);
209 CPUPPCState *env = &cpu->env;
210 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
211
212
213
214
215
216
217 ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm);
218 env->spr[SPR_PSSCR] |= PSSCR_EC;
219 cs->halted = 1;
220 kvmppc_set_reg_ppc_online(cpu, 0);
221 qemu_cpu_kick(cs);
222}
223
224static void rtas_ibm_suspend_me(PowerPCCPU *cpu, SpaprMachineState *spapr,
225 uint32_t token, uint32_t nargs,
226 target_ulong args,
227 uint32_t nret, target_ulong rets)
228{
229 CPUState *cs;
230
231 if (nargs != 0 || nret != 1) {
232 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
233 return;
234 }
235
236 CPU_FOREACH(cs) {
237 PowerPCCPU *c = POWERPC_CPU(cs);
238 CPUPPCState *e = &c->env;
239 if (c == cpu) {
240 continue;
241 }
242
243
244 if (!cs->halted || (e->msr & (1ULL << MSR_EE))) {
245 rtas_st(rets, 0, H_MULTI_THREADS_ACTIVE);
246 return;
247 }
248 }
249
250 qemu_system_suspend_request();
251 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
252}
253
254static inline int sysparm_st(target_ulong addr, target_ulong len,
255 const void *val, uint16_t vallen)
256{
257 hwaddr phys = ppc64_phys_to_real(addr);
258
259 if (len < 2) {
260 return RTAS_OUT_SYSPARM_PARAM_ERROR;
261 }
262 stw_be_phys(&address_space_memory, phys, vallen);
263 cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen));
264 return RTAS_OUT_SUCCESS;
265}
266
267static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
268 SpaprMachineState *spapr,
269 uint32_t token, uint32_t nargs,
270 target_ulong args,
271 uint32_t nret, target_ulong rets)
272{
273 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
274 MachineState *ms = MACHINE(spapr);
275 target_ulong parameter = rtas_ld(args, 0);
276 target_ulong buffer = rtas_ld(args, 1);
277 target_ulong length = rtas_ld(args, 2);
278 target_ulong ret;
279
280 switch (parameter) {
281 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: {
282 char *param_val = g_strdup_printf("MaxEntCap=%d,"
283 "DesMem=%" PRIu64 ","
284 "DesProcs=%d,"
285 "MaxPlatProcs=%d",
286 ms->smp.max_cpus,
287 ms->ram_size / MiB,
288 ms->smp.cpus,
289 ms->smp.max_cpus);
290 if (pcc->n_host_threads > 0) {
291 char *hostthr_val, *old = param_val;
292
293
294
295
296
297
298
299 hostthr_val = g_strdup_printf(",HostThrs=%d", pcc->n_host_threads);
300 param_val = g_strconcat(param_val, hostthr_val, NULL);
301 g_free(hostthr_val);
302 g_free(old);
303 }
304 ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1);
305 g_free(param_val);
306 break;
307 }
308 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: {
309 uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED;
310
311 ret = sysparm_st(buffer, length, ¶m_val, sizeof(param_val));
312 break;
313 }
314 case RTAS_SYSPARM_UUID:
315 ret = sysparm_st(buffer, length, (unsigned char *)&qemu_uuid,
316 (qemu_uuid_set ? 16 : 0));
317 break;
318 default:
319 ret = RTAS_OUT_NOT_SUPPORTED;
320 }
321
322 rtas_st(rets, 0, ret);
323}
324
325static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
326 SpaprMachineState *spapr,
327 uint32_t token, uint32_t nargs,
328 target_ulong args,
329 uint32_t nret, target_ulong rets)
330{
331 target_ulong parameter = rtas_ld(args, 0);
332 target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
333
334 switch (parameter) {
335 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS:
336 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE:
337 case RTAS_SYSPARM_UUID:
338 ret = RTAS_OUT_NOT_AUTHORIZED;
339 break;
340 }
341
342 rtas_st(rets, 0, ret);
343}
344
345static void rtas_ibm_os_term(PowerPCCPU *cpu,
346 SpaprMachineState *spapr,
347 uint32_t token, uint32_t nargs,
348 target_ulong args,
349 uint32_t nret, target_ulong rets)
350{
351 target_ulong msgaddr = rtas_ld(args, 0);
352 char msg[512];
353
354 cpu_physical_memory_read(msgaddr, msg, sizeof(msg) - 1);
355 msg[sizeof(msg) - 1] = 0;
356
357 error_report("OS terminated: %s", msg);
358 qemu_system_guest_panicked(NULL);
359
360 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
361}
362
363static void rtas_set_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr,
364 uint32_t token, uint32_t nargs,
365 target_ulong args, uint32_t nret,
366 target_ulong rets)
367{
368 int32_t power_domain;
369
370 if (nargs != 2 || nret != 2) {
371 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
372 return;
373 }
374
375
376
377
378 power_domain = rtas_ld(args, 0);
379 if (power_domain != -1) {
380 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
381 return;
382 }
383
384 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
385 rtas_st(rets, 1, 100);
386}
387
388static void rtas_get_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr,
389 uint32_t token, uint32_t nargs,
390 target_ulong args, uint32_t nret,
391 target_ulong rets)
392{
393 int32_t power_domain;
394
395 if (nargs != 1 || nret != 2) {
396 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
397 return;
398 }
399
400
401
402
403 power_domain = rtas_ld(args, 0);
404 if (power_domain != -1) {
405 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
406 return;
407 }
408
409 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
410 rtas_st(rets, 1, 100);
411}
412
413static void rtas_ibm_nmi_register(PowerPCCPU *cpu,
414 SpaprMachineState *spapr,
415 uint32_t token, uint32_t nargs,
416 target_ulong args,
417 uint32_t nret, target_ulong rets)
418{
419 hwaddr rtas_addr;
420 target_ulong sreset_addr, mce_addr;
421
422 if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) {
423 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
424 return;
425 }
426
427 rtas_addr = spapr_get_rtas_addr();
428 if (!rtas_addr) {
429 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
430 return;
431 }
432
433 sreset_addr = rtas_ld(args, 0);
434 mce_addr = rtas_ld(args, 1);
435
436
437 if (sreset_addr >= 32 * MiB || sreset_addr >= spapr->rma_size ||
438 mce_addr >= 32 * MiB || mce_addr >= spapr->rma_size) {
439 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
440 return;
441 }
442
443 if (kvm_enabled()) {
444 if (kvmppc_set_fwnmi(cpu) < 0) {
445 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
446 return;
447 }
448 }
449
450 spapr->fwnmi_system_reset_addr = sreset_addr;
451 spapr->fwnmi_machine_check_addr = mce_addr;
452
453 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
454}
455
456static void rtas_ibm_nmi_interlock(PowerPCCPU *cpu,
457 SpaprMachineState *spapr,
458 uint32_t token, uint32_t nargs,
459 target_ulong args,
460 uint32_t nret, target_ulong rets)
461{
462 if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) {
463 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
464 return;
465 }
466
467 if (spapr->fwnmi_machine_check_addr == -1) {
468 qemu_log_mask(LOG_GUEST_ERROR,
469"FWNMI: ibm,nmi-interlock RTAS called with FWNMI not registered.\n");
470
471
472 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
473 return;
474 }
475
476 if (spapr->fwnmi_machine_check_interlock != cpu->vcpu_id) {
477
478
479
480
481
482
483
484
485
486
487
488 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
489 return;
490 }
491
492
493
494
495
496 spapr->fwnmi_machine_check_interlock = -1;
497 qemu_cond_signal(&spapr->fwnmi_machine_check_interlock_cond);
498 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
499 migrate_del_blocker(spapr->fwnmi_migration_blocker);
500}
501
502static struct rtas_call {
503 const char *name;
504 spapr_rtas_fn fn;
505} rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE];
506
507target_ulong spapr_rtas_call(PowerPCCPU *cpu, SpaprMachineState *spapr,
508 uint32_t token, uint32_t nargs, target_ulong args,
509 uint32_t nret, target_ulong rets)
510{
511 if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) {
512 struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE);
513
514 if (call->fn) {
515 call->fn(cpu, spapr, token, nargs, args, nret, rets);
516 return H_SUCCESS;
517 }
518 }
519
520
521
522
523
524 if (token == 0xa) {
525 rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
526 return H_SUCCESS;
527 }
528
529 hcall_dprintf("Unknown RTAS token 0x%x\n", token);
530 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
531 return H_PARAMETER;
532}
533
534uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args,
535 uint32_t nret, uint64_t rets)
536{
537 int token;
538
539 for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) {
540 if (strcmp(cmd, rtas_table[token].name) == 0) {
541 SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
542 PowerPCCPU *cpu = POWERPC_CPU(first_cpu);
543
544 rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE,
545 nargs, args, nret, rets);
546 return H_SUCCESS;
547 }
548 }
549 return H_PARAMETER;
550}
551
552void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
553{
554 assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX));
555
556 token -= RTAS_TOKEN_BASE;
557
558 assert(!name || !rtas_table[token].name);
559
560 rtas_table[token].name = name;
561 rtas_table[token].fn = fn;
562}
563
564void spapr_dt_rtas_tokens(void *fdt, int rtas)
565{
566 int i;
567
568 for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) {
569 struct rtas_call *call = &rtas_table[i];
570
571 if (!call->name) {
572 continue;
573 }
574
575 _FDT(fdt_setprop_cell(fdt, rtas, call->name, i + RTAS_TOKEN_BASE));
576 }
577}
578
579hwaddr spapr_get_rtas_addr(void)
580{
581 SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
582 int rtas_node;
583 const fdt32_t *rtas_data;
584 void *fdt = spapr->fdt_blob;
585
586
587 rtas_node = fdt_path_offset(fdt, "/rtas");
588 if (rtas_node < 0) {
589 return 0;
590 }
591
592 rtas_data = fdt_getprop(fdt, rtas_node, "linux,rtas-base", NULL);
593 if (!rtas_data) {
594 return 0;
595 }
596
597
598
599
600
601
602 return (hwaddr)fdt32_to_cpu(*rtas_data);
603}
604
605static void core_rtas_register_types(void)
606{
607 spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character",
608 rtas_display_character);
609 spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off);
610 spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot",
611 rtas_system_reboot);
612 spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state",
613 rtas_query_cpu_stopped_state);
614 spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu);
615 spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self);
616 spapr_rtas_register(RTAS_IBM_SUSPEND_ME, "ibm,suspend-me",
617 rtas_ibm_suspend_me);
618 spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER,
619 "ibm,get-system-parameter",
620 rtas_ibm_get_system_parameter);
621 spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
622 "ibm,set-system-parameter",
623 rtas_ibm_set_system_parameter);
624 spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term",
625 rtas_ibm_os_term);
626 spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level",
627 rtas_set_power_level);
628 spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level",
629 rtas_get_power_level);
630 spapr_rtas_register(RTAS_IBM_NMI_REGISTER, "ibm,nmi-register",
631 rtas_ibm_nmi_register);
632 spapr_rtas_register(RTAS_IBM_NMI_INTERLOCK, "ibm,nmi-interlock",
633 rtas_ibm_nmi_interlock);
634}
635
636type_init(core_rtas_register_types)
637