1 /*
2 * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
3 *
4 * Hypercall based emulated RTAS
5 *
6 * Copyright (c) 2010-2011 David Gibson, IBM Corporation.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
25 *
26 */
27
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 "sysemu/qtest.h"
37 #include "kvm_ppc.h"
38
39 #include "hw/ppc/spapr.h"
40 #include "hw/ppc/spapr_vio.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
rtas_display_character(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)54 static 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
rtas_power_off(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)70 static 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
rtas_system_reboot(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)83 static 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
rtas_query_cpu_stopped_state(PowerPCCPU * cpu_,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)96 static 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 /* Didn't find a matching cpu */
124 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
125 }
126
rtas_start_cpu(PowerPCCPU * callcpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)127 static 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 /* Didn't find a matching cpu */
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 /* Set ILE the same way */
170 lpcr = (lpcr & ~LPCR_ILE) | (caller_lpcr & LPCR_ILE);
171
172 /* Set AIL the same way */
173 lpcr = (lpcr & ~LPCR_AIL) | (caller_lpcr & LPCR_AIL);
174
175 if (env->mmu_model == POWERPC_MMU_3_00) {
176 /*
177 * New cpus are expected to start in the same radix/hash mode
178 * as the existing CPUs
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 * Set the timebase offset of the new CPU to that of the invoking
191 * CPU. This helps hotplugged CPU to have the correct timebase
192 * offset.
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
rtas_stop_self(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)203 static 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 /* Disable Power-saving mode Exit Cause exceptions for the CPU.
213 * This could deliver an interrupt on a dying CPU and crash the
214 * guest.
215 * For the same reason, set PSSCR_EC.
216 */
217 env->spr[SPR_PSSCR] |= PSSCR_EC;
218 cs->halted = 1;
219 ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm);
220 kvmppc_set_reg_ppc_online(cpu, 0);
221 qemu_cpu_kick(cs);
222 }
223
rtas_ibm_suspend_me(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)224 static 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 /* See h_join */
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
sysparm_st(target_ulong addr,target_ulong len,const void * val,uint16_t vallen)254 static 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
rtas_ibm_get_system_parameter(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)267 static 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 g_autofree 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 /*
292 * Add HostThrs property. This property is not present in PAPR but
293 * is expected by some guests to communicate the number of physical
294 * host threads per core on the system so that they can scale
295 * information which varies based on the thread configuration.
296 */
297 g_autofree char *hostthr_val = g_strdup_printf(",HostThrs=%d",
298 pcc->n_host_threads);
299 char *old = param_val;
300
301 param_val = g_strconcat(param_val, hostthr_val, NULL);
302 g_free(old);
303 }
304 ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1);
305 break;
306 }
307 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: {
308 uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED;
309
310 ret = sysparm_st(buffer, length, ¶m_val, sizeof(param_val));
311 break;
312 }
313 case RTAS_SYSPARM_UUID:
314 ret = sysparm_st(buffer, length, (unsigned char *)&qemu_uuid,
315 (qemu_uuid_set ? 16 : 0));
316 break;
317 default:
318 ret = RTAS_OUT_NOT_SUPPORTED;
319 }
320
321 rtas_st(rets, 0, ret);
322 }
323
rtas_ibm_set_system_parameter(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)324 static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
325 SpaprMachineState *spapr,
326 uint32_t token, uint32_t nargs,
327 target_ulong args,
328 uint32_t nret, target_ulong rets)
329 {
330 target_ulong parameter = rtas_ld(args, 0);
331 target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
332
333 switch (parameter) {
334 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS:
335 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE:
336 case RTAS_SYSPARM_UUID:
337 ret = RTAS_OUT_NOT_AUTHORIZED;
338 break;
339 }
340
341 rtas_st(rets, 0, ret);
342 }
343
rtas_ibm_os_term(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)344 static void rtas_ibm_os_term(PowerPCCPU *cpu,
345 SpaprMachineState *spapr,
346 uint32_t token, uint32_t nargs,
347 target_ulong args,
348 uint32_t nret, target_ulong rets)
349 {
350 target_ulong msgaddr = rtas_ld(args, 0);
351 char msg[512];
352
353 cpu_physical_memory_read(msgaddr, msg, sizeof(msg) - 1);
354 msg[sizeof(msg) - 1] = 0;
355
356 error_report("OS terminated: %s", msg);
357 qemu_system_guest_panicked(NULL);
358
359 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
360 }
361
rtas_set_power_level(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)362 static void rtas_set_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr,
363 uint32_t token, uint32_t nargs,
364 target_ulong args, uint32_t nret,
365 target_ulong rets)
366 {
367 int32_t power_domain;
368
369 if (nargs != 2 || nret != 2) {
370 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
371 return;
372 }
373
374 /* we currently only use a single, "live insert" powerdomain for
375 * hotplugged/dlpar'd resources, so the power is always live/full (100)
376 */
377 power_domain = rtas_ld(args, 0);
378 if (power_domain != -1) {
379 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
380 return;
381 }
382
383 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
384 rtas_st(rets, 1, 100);
385 }
386
rtas_get_power_level(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)387 static void rtas_get_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr,
388 uint32_t token, uint32_t nargs,
389 target_ulong args, uint32_t nret,
390 target_ulong rets)
391 {
392 int32_t power_domain;
393
394 if (nargs != 1 || nret != 2) {
395 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
396 return;
397 }
398
399 /* we currently only use a single, "live insert" powerdomain for
400 * hotplugged/dlpar'd resources, so the power is always live/full (100)
401 */
402 power_domain = rtas_ld(args, 0);
403 if (power_domain != -1) {
404 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
405 return;
406 }
407
408 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
409 rtas_st(rets, 1, 100);
410 }
411
rtas_ibm_nmi_register(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)412 static void rtas_ibm_nmi_register(PowerPCCPU *cpu,
413 SpaprMachineState *spapr,
414 uint32_t token, uint32_t nargs,
415 target_ulong args,
416 uint32_t nret, target_ulong rets)
417 {
418 hwaddr rtas_addr;
419 target_ulong sreset_addr, mce_addr;
420
421 if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) {
422 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
423 return;
424 }
425
426 rtas_addr = spapr_get_rtas_addr();
427 if (!rtas_addr) {
428 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
429 return;
430 }
431
432 sreset_addr = rtas_ld(args, 0);
433 mce_addr = rtas_ld(args, 1);
434
435 /* PAPR requires these are in the first 32M of memory and within RMA */
436 if (sreset_addr >= 32 * MiB || sreset_addr >= spapr->rma_size ||
437 mce_addr >= 32 * MiB || mce_addr >= spapr->rma_size) {
438 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
439 return;
440 }
441
442 if (kvm_enabled()) {
443 if (kvmppc_set_fwnmi(cpu) < 0) {
444 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
445 return;
446 }
447 }
448
449 spapr->fwnmi_system_reset_addr = sreset_addr;
450 spapr->fwnmi_machine_check_addr = mce_addr;
451
452 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
453 }
454
rtas_ibm_nmi_interlock(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)455 static void rtas_ibm_nmi_interlock(PowerPCCPU *cpu,
456 SpaprMachineState *spapr,
457 uint32_t token, uint32_t nargs,
458 target_ulong args,
459 uint32_t nret, target_ulong rets)
460 {
461 if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) {
462 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
463 return;
464 }
465
466 if (spapr->fwnmi_machine_check_addr == -1) {
467 qemu_log_mask(LOG_GUEST_ERROR,
468 "FWNMI: ibm,nmi-interlock RTAS called with FWNMI not registered.\n");
469
470 /* NMI register not called */
471 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
472 return;
473 }
474
475 if (spapr->fwnmi_machine_check_interlock != cpu->vcpu_id) {
476 /*
477 * The vCPU that hit the NMI should invoke "ibm,nmi-interlock"
478 * This should be PARAM_ERROR, but Linux calls "ibm,nmi-interlock"
479 * for system reset interrupts, despite them not being interlocked.
480 * PowerVM silently ignores this and returns success here. Returning
481 * failure causes Linux to print the error "FWNMI: nmi-interlock
482 * failed: -3", although no other apparent ill effects, this is a
483 * regression for the user when enabling FWNMI. So for now, match
484 * PowerVM. When most Linux clients are fixed, this could be
485 * changed.
486 */
487 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
488 return;
489 }
490
491 /*
492 * vCPU issuing "ibm,nmi-interlock" is done with NMI handling,
493 * hence unset fwnmi_machine_check_interlock.
494 */
495 spapr->fwnmi_machine_check_interlock = -1;
496 qemu_cond_signal(&spapr->fwnmi_machine_check_interlock_cond);
497 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
498 migrate_del_blocker(&spapr->fwnmi_migration_blocker);
499 }
500
501 static struct rtas_call {
502 const char *name;
503 spapr_rtas_fn fn;
504 } rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE];
505
spapr_rtas_call(PowerPCCPU * cpu,SpaprMachineState * spapr,uint32_t token,uint32_t nargs,target_ulong args,uint32_t nret,target_ulong rets)506 target_ulong spapr_rtas_call(PowerPCCPU *cpu, SpaprMachineState *spapr,
507 uint32_t token, uint32_t nargs, target_ulong args,
508 uint32_t nret, target_ulong rets)
509 {
510 if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) {
511 struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE);
512
513 if (call->fn) {
514 call->fn(cpu, spapr, token, nargs, args, nret, rets);
515 return H_SUCCESS;
516 }
517 }
518
519 /* HACK: Some Linux early debug code uses RTAS display-character,
520 * but assumes the token value is 0xa (which it is on some real
521 * machines) without looking it up in the device tree. This
522 * special case makes this work */
523 if (token == 0xa) {
524 rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
525 return H_SUCCESS;
526 }
527
528 hcall_dprintf("Unknown RTAS token 0x%x\n", token);
529 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
530 return H_PARAMETER;
531 }
532
qtest_rtas_call(char * cmd,uint32_t nargs,uint64_t args,uint32_t nret,uint64_t rets)533 static uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args,
534 uint32_t nret, uint64_t rets)
535 {
536 int token;
537
538 for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) {
539 if (strcmp(cmd, rtas_table[token].name) == 0) {
540 SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
541 PowerPCCPU *cpu = POWERPC_CPU(first_cpu);
542
543 rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE,
544 nargs, args, nret, rets);
545 return H_SUCCESS;
546 }
547 }
548 return H_PARAMETER;
549 }
550
spapr_qtest_callback(CharBackend * chr,gchar ** words)551 static bool spapr_qtest_callback(CharBackend *chr, gchar **words)
552 {
553 if (strcmp(words[0], "rtas") == 0) {
554 uint64_t res, args, ret;
555 unsigned long nargs, nret;
556 int rc;
557
558 rc = qemu_strtoul(words[2], NULL, 0, &nargs);
559 g_assert(rc == 0);
560 rc = qemu_strtou64(words[3], NULL, 0, &args);
561 g_assert(rc == 0);
562 rc = qemu_strtoul(words[4], NULL, 0, &nret);
563 g_assert(rc == 0);
564 rc = qemu_strtou64(words[5], NULL, 0, &ret);
565 g_assert(rc == 0);
566 res = qtest_rtas_call(words[1], nargs, args, nret, ret);
567
568 qtest_send_prefix(chr);
569 qtest_sendf(chr, "OK %"PRIu64"\n", res);
570
571 return true;
572 }
573
574 return false;
575 }
576
spapr_rtas_register(int token,const char * name,spapr_rtas_fn fn)577 void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
578 {
579 assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX));
580
581 token -= RTAS_TOKEN_BASE;
582
583 assert(!name || !rtas_table[token].name);
584
585 rtas_table[token].name = name;
586 rtas_table[token].fn = fn;
587 }
588
spapr_dt_rtas_tokens(void * fdt,int rtas)589 void spapr_dt_rtas_tokens(void *fdt, int rtas)
590 {
591 int i;
592
593 for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) {
594 struct rtas_call *call = &rtas_table[i];
595
596 if (!call->name) {
597 continue;
598 }
599
600 _FDT(fdt_setprop_cell(fdt, rtas, call->name, i + RTAS_TOKEN_BASE));
601 }
602 }
603
spapr_get_rtas_addr(void)604 hwaddr spapr_get_rtas_addr(void)
605 {
606 SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
607 int rtas_node;
608 const fdt32_t *rtas_data;
609 void *fdt = spapr->fdt_blob;
610
611 /* fetch rtas addr from fdt */
612 rtas_node = fdt_path_offset(fdt, "/rtas");
613 if (rtas_node < 0) {
614 return 0;
615 }
616
617 rtas_data = fdt_getprop(fdt, rtas_node, "linux,rtas-base", NULL);
618 if (!rtas_data) {
619 return 0;
620 }
621
622 /*
623 * We assume that the OS called RTAS instantiate-rtas, but some other
624 * OS might call RTAS instantiate-rtas-64 instead. This fine as of now
625 * as SLOF only supports 32-bit variant.
626 */
627 return (hwaddr)fdt32_to_cpu(*rtas_data);
628 }
629
core_rtas_register_types(void)630 static void core_rtas_register_types(void)
631 {
632 spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character",
633 rtas_display_character);
634 spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off);
635 spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot",
636 rtas_system_reboot);
637 spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state",
638 rtas_query_cpu_stopped_state);
639 spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu);
640 spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self);
641 spapr_rtas_register(RTAS_IBM_SUSPEND_ME, "ibm,suspend-me",
642 rtas_ibm_suspend_me);
643 spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER,
644 "ibm,get-system-parameter",
645 rtas_ibm_get_system_parameter);
646 spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
647 "ibm,set-system-parameter",
648 rtas_ibm_set_system_parameter);
649 spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term",
650 rtas_ibm_os_term);
651 spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level",
652 rtas_set_power_level);
653 spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level",
654 rtas_get_power_level);
655 spapr_rtas_register(RTAS_IBM_NMI_REGISTER, "ibm,nmi-register",
656 rtas_ibm_nmi_register);
657 spapr_rtas_register(RTAS_IBM_NMI_INTERLOCK, "ibm,nmi-interlock",
658 rtas_ibm_nmi_interlock);
659
660 qtest_set_command_cb(spapr_qtest_callback);
661 }
662
663 type_init(core_rtas_register_types)
664