util: introduce qemu_open and qemu_create with error reporting
[qemu/ar7.git] / hw / ppc / spapr_rtas.c
blob513c7a84351bcfb31638c7b655e91edc4a6ebb6f
1 /*
2 * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator
4 * Hypercall based emulated RTAS
6 * Copyright (c) 2010-2011 David Gibson, IBM Corporation.
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:
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
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.
28 #include "qemu/osdep.h"
29 #include "cpu.h"
30 #include "qemu/log.h"
31 #include "qemu/error-report.h"
32 #include "sysemu/sysemu.h"
33 #include "sysemu/device_tree.h"
34 #include "sysemu/cpus.h"
35 #include "sysemu/hw_accel.h"
36 #include "sysemu/runstate.h"
37 #include "kvm_ppc.h"
39 #include "hw/ppc/spapr.h"
40 #include "hw/ppc/spapr_vio.h"
41 #include "hw/ppc/spapr_rtas.h"
42 #include "hw/ppc/spapr_cpu_core.h"
43 #include "hw/ppc/ppc.h"
44 #include "hw/boards.h"
46 #include <libfdt.h>
47 #include "hw/ppc/spapr_drc.h"
48 #include "qemu/cutils.h"
49 #include "trace.h"
50 #include "hw/ppc/fdt.h"
51 #include "target/ppc/mmu-hash64.h"
52 #include "target/ppc/mmu-book3s-v3.h"
53 #include "migration/blocker.h"
55 static void rtas_display_character(PowerPCCPU *cpu, SpaprMachineState *spapr,
56 uint32_t token, uint32_t nargs,
57 target_ulong args,
58 uint32_t nret, target_ulong rets)
60 uint8_t c = rtas_ld(args, 0);
61 SpaprVioDevice *sdev = vty_lookup(spapr, 0);
63 if (!sdev) {
64 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
65 } else {
66 vty_putchars(sdev, &c, sizeof(c));
67 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
71 static void rtas_power_off(PowerPCCPU *cpu, SpaprMachineState *spapr,
72 uint32_t token, uint32_t nargs, target_ulong args,
73 uint32_t nret, target_ulong rets)
75 if (nargs != 2 || nret != 1) {
76 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
77 return;
79 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
80 cpu_stop_current();
81 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
84 static void rtas_system_reboot(PowerPCCPU *cpu, SpaprMachineState *spapr,
85 uint32_t token, uint32_t nargs,
86 target_ulong args,
87 uint32_t nret, target_ulong rets)
89 if (nargs != 0 || nret != 1) {
90 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
91 return;
93 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
94 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
97 static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
98 SpaprMachineState *spapr,
99 uint32_t token, uint32_t nargs,
100 target_ulong args,
101 uint32_t nret, target_ulong rets)
103 target_ulong id;
104 PowerPCCPU *cpu;
106 if (nargs != 1 || nret != 2) {
107 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
108 return;
111 id = rtas_ld(args, 0);
112 cpu = spapr_find_cpu(id);
113 if (cpu != NULL) {
114 if (CPU(cpu)->halted) {
115 rtas_st(rets, 1, 0);
116 } else {
117 rtas_st(rets, 1, 2);
120 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
121 return;
124 /* Didn't find a matching cpu */
125 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
128 static void rtas_start_cpu(PowerPCCPU *callcpu, SpaprMachineState *spapr,
129 uint32_t token, uint32_t nargs,
130 target_ulong args,
131 uint32_t nret, target_ulong rets)
133 target_ulong id, start, r3;
134 PowerPCCPU *newcpu;
135 CPUPPCState *env;
136 PowerPCCPUClass *pcc;
137 target_ulong lpcr;
139 if (nargs != 3 || nret != 1) {
140 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
141 return;
144 id = rtas_ld(args, 0);
145 start = rtas_ld(args, 1);
146 r3 = rtas_ld(args, 2);
148 newcpu = spapr_find_cpu(id);
149 if (!newcpu) {
150 /* Didn't find a matching cpu */
151 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
152 return;
155 env = &newcpu->env;
156 pcc = POWERPC_CPU_GET_CLASS(newcpu);
158 if (!CPU(newcpu)->halted) {
159 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
160 return;
163 cpu_synchronize_state(CPU(newcpu));
165 env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
167 /* Enable Power-saving mode Exit Cause exceptions for the new CPU */
168 lpcr = env->spr[SPR_LPCR];
169 if (!pcc->interrupts_big_endian(callcpu)) {
170 lpcr |= LPCR_ILE;
172 if (env->mmu_model == POWERPC_MMU_3_00) {
174 * New cpus are expected to start in the same radix/hash mode
175 * as the existing CPUs
177 if (ppc64_v3_radix(callcpu)) {
178 lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR;
179 } else {
180 lpcr &= ~(LPCR_UPRT | LPCR_GTSE | LPCR_HR);
182 env->spr[SPR_PSSCR] &= ~PSSCR_EC;
184 ppc_store_lpcr(newcpu, lpcr);
187 * Set the timebase offset of the new CPU to that of the invoking
188 * CPU. This helps hotplugged CPU to have the correct timebase
189 * offset.
191 newcpu->env.tb_env->tb_offset = callcpu->env.tb_env->tb_offset;
193 spapr_cpu_set_entry_state(newcpu, start, 0, r3, 0);
195 qemu_cpu_kick(CPU(newcpu));
197 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
200 static void rtas_stop_self(PowerPCCPU *cpu, SpaprMachineState *spapr,
201 uint32_t token, uint32_t nargs,
202 target_ulong args,
203 uint32_t nret, target_ulong rets)
205 CPUState *cs = CPU(cpu);
206 CPUPPCState *env = &cpu->env;
207 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
209 /* Disable Power-saving mode Exit Cause exceptions for the CPU.
210 * This could deliver an interrupt on a dying CPU and crash the
211 * guest.
212 * For the same reason, set PSSCR_EC.
214 ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm);
215 env->spr[SPR_PSSCR] |= PSSCR_EC;
216 cs->halted = 1;
217 kvmppc_set_reg_ppc_online(cpu, 0);
218 qemu_cpu_kick(cs);
221 static void rtas_ibm_suspend_me(PowerPCCPU *cpu, SpaprMachineState *spapr,
222 uint32_t token, uint32_t nargs,
223 target_ulong args,
224 uint32_t nret, target_ulong rets)
226 CPUState *cs;
228 if (nargs != 0 || nret != 1) {
229 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
230 return;
233 CPU_FOREACH(cs) {
234 PowerPCCPU *c = POWERPC_CPU(cs);
235 CPUPPCState *e = &c->env;
236 if (c == cpu) {
237 continue;
240 /* See h_join */
241 if (!cs->halted || (e->msr & (1ULL << MSR_EE))) {
242 rtas_st(rets, 0, H_MULTI_THREADS_ACTIVE);
243 return;
247 qemu_system_suspend_request();
248 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
251 static inline int sysparm_st(target_ulong addr, target_ulong len,
252 const void *val, uint16_t vallen)
254 hwaddr phys = ppc64_phys_to_real(addr);
256 if (len < 2) {
257 return RTAS_OUT_SYSPARM_PARAM_ERROR;
259 stw_be_phys(&address_space_memory, phys, vallen);
260 cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen));
261 return RTAS_OUT_SUCCESS;
264 static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
265 SpaprMachineState *spapr,
266 uint32_t token, uint32_t nargs,
267 target_ulong args,
268 uint32_t nret, target_ulong rets)
270 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
271 MachineState *ms = MACHINE(spapr);
272 target_ulong parameter = rtas_ld(args, 0);
273 target_ulong buffer = rtas_ld(args, 1);
274 target_ulong length = rtas_ld(args, 2);
275 target_ulong ret;
277 switch (parameter) {
278 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: {
279 char *param_val = g_strdup_printf("MaxEntCap=%d,"
280 "DesMem=%" PRIu64 ","
281 "DesProcs=%d,"
282 "MaxPlatProcs=%d",
283 ms->smp.max_cpus,
284 ms->ram_size / MiB,
285 ms->smp.cpus,
286 ms->smp.max_cpus);
287 if (pcc->n_host_threads > 0) {
288 char *hostthr_val, *old = param_val;
291 * Add HostThrs property. This property is not present in PAPR but
292 * is expected by some guests to communicate the number of physical
293 * host threads per core on the system so that they can scale
294 * information which varies based on the thread configuration.
296 hostthr_val = g_strdup_printf(",HostThrs=%d", pcc->n_host_threads);
297 param_val = g_strconcat(param_val, hostthr_val, NULL);
298 g_free(hostthr_val);
299 g_free(old);
301 ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1);
302 g_free(param_val);
303 break;
305 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: {
306 uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED;
308 ret = sysparm_st(buffer, length, &param_val, sizeof(param_val));
309 break;
311 case RTAS_SYSPARM_UUID:
312 ret = sysparm_st(buffer, length, (unsigned char *)&qemu_uuid,
313 (qemu_uuid_set ? 16 : 0));
314 break;
315 default:
316 ret = RTAS_OUT_NOT_SUPPORTED;
319 rtas_st(rets, 0, ret);
322 static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
323 SpaprMachineState *spapr,
324 uint32_t token, uint32_t nargs,
325 target_ulong args,
326 uint32_t nret, target_ulong rets)
328 target_ulong parameter = rtas_ld(args, 0);
329 target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
331 switch (parameter) {
332 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS:
333 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE:
334 case RTAS_SYSPARM_UUID:
335 ret = RTAS_OUT_NOT_AUTHORIZED;
336 break;
339 rtas_st(rets, 0, ret);
342 static void rtas_ibm_os_term(PowerPCCPU *cpu,
343 SpaprMachineState *spapr,
344 uint32_t token, uint32_t nargs,
345 target_ulong args,
346 uint32_t nret, target_ulong rets)
348 target_ulong msgaddr = rtas_ld(args, 0);
349 char msg[512];
351 cpu_physical_memory_read(msgaddr, msg, sizeof(msg) - 1);
352 msg[sizeof(msg) - 1] = 0;
354 error_report("OS terminated: %s", msg);
355 qemu_system_guest_panicked(NULL);
357 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
360 static void rtas_set_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr,
361 uint32_t token, uint32_t nargs,
362 target_ulong args, uint32_t nret,
363 target_ulong rets)
365 int32_t power_domain;
367 if (nargs != 2 || nret != 2) {
368 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
369 return;
372 /* we currently only use a single, "live insert" powerdomain for
373 * hotplugged/dlpar'd resources, so the power is always live/full (100)
375 power_domain = rtas_ld(args, 0);
376 if (power_domain != -1) {
377 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
378 return;
381 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
382 rtas_st(rets, 1, 100);
385 static void rtas_get_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr,
386 uint32_t token, uint32_t nargs,
387 target_ulong args, uint32_t nret,
388 target_ulong rets)
390 int32_t power_domain;
392 if (nargs != 1 || nret != 2) {
393 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
394 return;
397 /* we currently only use a single, "live insert" powerdomain for
398 * hotplugged/dlpar'd resources, so the power is always live/full (100)
400 power_domain = rtas_ld(args, 0);
401 if (power_domain != -1) {
402 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
403 return;
406 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
407 rtas_st(rets, 1, 100);
410 static void rtas_ibm_nmi_register(PowerPCCPU *cpu,
411 SpaprMachineState *spapr,
412 uint32_t token, uint32_t nargs,
413 target_ulong args,
414 uint32_t nret, target_ulong rets)
416 hwaddr rtas_addr;
417 target_ulong sreset_addr, mce_addr;
419 if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) {
420 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
421 return;
424 rtas_addr = spapr_get_rtas_addr();
425 if (!rtas_addr) {
426 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
427 return;
430 sreset_addr = rtas_ld(args, 0);
431 mce_addr = rtas_ld(args, 1);
433 /* PAPR requires these are in the first 32M of memory and within RMA */
434 if (sreset_addr >= 32 * MiB || sreset_addr >= spapr->rma_size ||
435 mce_addr >= 32 * MiB || mce_addr >= spapr->rma_size) {
436 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
437 return;
440 if (kvm_enabled()) {
441 if (kvmppc_set_fwnmi(cpu) < 0) {
442 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
443 return;
447 spapr->fwnmi_system_reset_addr = sreset_addr;
448 spapr->fwnmi_machine_check_addr = mce_addr;
450 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
453 static void rtas_ibm_nmi_interlock(PowerPCCPU *cpu,
454 SpaprMachineState *spapr,
455 uint32_t token, uint32_t nargs,
456 target_ulong args,
457 uint32_t nret, target_ulong rets)
459 if (spapr_get_cap(spapr, SPAPR_CAP_FWNMI) == SPAPR_CAP_OFF) {
460 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
461 return;
464 if (spapr->fwnmi_machine_check_addr == -1) {
465 qemu_log_mask(LOG_GUEST_ERROR,
466 "FWNMI: ibm,nmi-interlock RTAS called with FWNMI not registered.\n");
468 /* NMI register not called */
469 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
470 return;
473 if (spapr->fwnmi_machine_check_interlock != cpu->vcpu_id) {
475 * The vCPU that hit the NMI should invoke "ibm,nmi-interlock"
476 * This should be PARAM_ERROR, but Linux calls "ibm,nmi-interlock"
477 * for system reset interrupts, despite them not being interlocked.
478 * PowerVM silently ignores this and returns success here. Returning
479 * failure causes Linux to print the error "FWNMI: nmi-interlock
480 * failed: -3", although no other apparent ill effects, this is a
481 * regression for the user when enabling FWNMI. So for now, match
482 * PowerVM. When most Linux clients are fixed, this could be
483 * changed.
485 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
486 return;
490 * vCPU issuing "ibm,nmi-interlock" is done with NMI handling,
491 * hence unset fwnmi_machine_check_interlock.
493 spapr->fwnmi_machine_check_interlock = -1;
494 qemu_cond_signal(&spapr->fwnmi_machine_check_interlock_cond);
495 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
496 migrate_del_blocker(spapr->fwnmi_migration_blocker);
499 static struct rtas_call {
500 const char *name;
501 spapr_rtas_fn fn;
502 } rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE];
504 target_ulong spapr_rtas_call(PowerPCCPU *cpu, SpaprMachineState *spapr,
505 uint32_t token, uint32_t nargs, target_ulong args,
506 uint32_t nret, target_ulong rets)
508 if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) {
509 struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE);
511 if (call->fn) {
512 call->fn(cpu, spapr, token, nargs, args, nret, rets);
513 return H_SUCCESS;
517 /* HACK: Some Linux early debug code uses RTAS display-character,
518 * but assumes the token value is 0xa (which it is on some real
519 * machines) without looking it up in the device tree. This
520 * special case makes this work */
521 if (token == 0xa) {
522 rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
523 return H_SUCCESS;
526 hcall_dprintf("Unknown RTAS token 0x%x\n", token);
527 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
528 return H_PARAMETER;
531 uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args,
532 uint32_t nret, uint64_t rets)
534 int token;
536 for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) {
537 if (strcmp(cmd, rtas_table[token].name) == 0) {
538 SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
539 PowerPCCPU *cpu = POWERPC_CPU(first_cpu);
541 rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE,
542 nargs, args, nret, rets);
543 return H_SUCCESS;
546 return H_PARAMETER;
549 void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
551 assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX));
553 token -= RTAS_TOKEN_BASE;
555 assert(!name || !rtas_table[token].name);
557 rtas_table[token].name = name;
558 rtas_table[token].fn = fn;
561 void spapr_dt_rtas_tokens(void *fdt, int rtas)
563 int i;
565 for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) {
566 struct rtas_call *call = &rtas_table[i];
568 if (!call->name) {
569 continue;
572 _FDT(fdt_setprop_cell(fdt, rtas, call->name, i + RTAS_TOKEN_BASE));
576 hwaddr spapr_get_rtas_addr(void)
578 SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
579 int rtas_node;
580 const fdt32_t *rtas_data;
581 void *fdt = spapr->fdt_blob;
583 /* fetch rtas addr from fdt */
584 rtas_node = fdt_path_offset(fdt, "/rtas");
585 if (rtas_node < 0) {
586 return 0;
589 rtas_data = fdt_getprop(fdt, rtas_node, "linux,rtas-base", NULL);
590 if (!rtas_data) {
591 return 0;
595 * We assume that the OS called RTAS instantiate-rtas, but some other
596 * OS might call RTAS instantiate-rtas-64 instead. This fine as of now
597 * as SLOF only supports 32-bit variant.
599 return (hwaddr)fdt32_to_cpu(*rtas_data);
602 static void core_rtas_register_types(void)
604 spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character",
605 rtas_display_character);
606 spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off);
607 spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot",
608 rtas_system_reboot);
609 spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state",
610 rtas_query_cpu_stopped_state);
611 spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu);
612 spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self);
613 spapr_rtas_register(RTAS_IBM_SUSPEND_ME, "ibm,suspend-me",
614 rtas_ibm_suspend_me);
615 spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER,
616 "ibm,get-system-parameter",
617 rtas_ibm_get_system_parameter);
618 spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
619 "ibm,set-system-parameter",
620 rtas_ibm_set_system_parameter);
621 spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term",
622 rtas_ibm_os_term);
623 spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level",
624 rtas_set_power_level);
625 spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level",
626 rtas_get_power_level);
627 spapr_rtas_register(RTAS_IBM_NMI_REGISTER, "ibm,nmi-register",
628 rtas_ibm_nmi_register);
629 spapr_rtas_register(RTAS_IBM_NMI_INTERLOCK, "ibm,nmi-interlock",
630 rtas_ibm_nmi_interlock);
633 type_init(core_rtas_register_types)