Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20190719' into staging
[qemu/ar7.git] / hw / ppc / spapr_rtas.c
bloba618a2ac0f3f9462e0f8ea92c563a4eec96fc57e
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.
27 #include "qemu/osdep.h"
28 #include "cpu.h"
29 #include "qemu/log.h"
30 #include "qemu/error-report.h"
31 #include "sysemu/sysemu.h"
32 #include "hw/qdev.h"
33 #include "sysemu/device_tree.h"
34 #include "sysemu/cpus.h"
35 #include "sysemu/hw_accel.h"
36 #include "kvm_ppc.h"
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 #include "hw/boards.h"
45 #include <libfdt.h>
46 #include "hw/ppc/spapr_drc.h"
47 #include "qemu/cutils.h"
48 #include "trace.h"
49 #include "hw/ppc/fdt.h"
50 #include "target/ppc/mmu-hash64.h"
51 #include "target/ppc/mmu-book3s-v3.h"
53 static void rtas_display_character(PowerPCCPU *cpu, SpaprMachineState *spapr,
54 uint32_t token, uint32_t nargs,
55 target_ulong args,
56 uint32_t nret, target_ulong rets)
58 uint8_t c = rtas_ld(args, 0);
59 SpaprVioDevice *sdev = vty_lookup(spapr, 0);
61 if (!sdev) {
62 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
63 } else {
64 vty_putchars(sdev, &c, sizeof(c));
65 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
69 static void rtas_power_off(PowerPCCPU *cpu, SpaprMachineState *spapr,
70 uint32_t token, uint32_t nargs, target_ulong args,
71 uint32_t nret, target_ulong rets)
73 if (nargs != 2 || nret != 1) {
74 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
75 return;
77 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
78 cpu_stop_current();
79 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
82 static void rtas_system_reboot(PowerPCCPU *cpu, SpaprMachineState *spapr,
83 uint32_t token, uint32_t nargs,
84 target_ulong args,
85 uint32_t nret, target_ulong rets)
87 if (nargs != 0 || nret != 1) {
88 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
89 return;
91 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
92 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
95 static void rtas_query_cpu_stopped_state(PowerPCCPU *cpu_,
96 SpaprMachineState *spapr,
97 uint32_t token, uint32_t nargs,
98 target_ulong args,
99 uint32_t nret, target_ulong rets)
101 target_ulong id;
102 PowerPCCPU *cpu;
104 if (nargs != 1 || nret != 2) {
105 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
106 return;
109 id = rtas_ld(args, 0);
110 cpu = spapr_find_cpu(id);
111 if (cpu != NULL) {
112 if (CPU(cpu)->halted) {
113 rtas_st(rets, 1, 0);
114 } else {
115 rtas_st(rets, 1, 2);
118 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
119 return;
122 /* Didn't find a matching cpu */
123 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
126 static void rtas_start_cpu(PowerPCCPU *callcpu, SpaprMachineState *spapr,
127 uint32_t token, uint32_t nargs,
128 target_ulong args,
129 uint32_t nret, target_ulong rets)
131 target_ulong id, start, r3;
132 PowerPCCPU *newcpu;
133 CPUPPCState *env;
134 PowerPCCPUClass *pcc;
135 target_ulong lpcr;
137 if (nargs != 3 || nret != 1) {
138 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
139 return;
142 id = rtas_ld(args, 0);
143 start = rtas_ld(args, 1);
144 r3 = rtas_ld(args, 2);
146 newcpu = spapr_find_cpu(id);
147 if (!newcpu) {
148 /* Didn't find a matching cpu */
149 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
150 return;
153 env = &newcpu->env;
154 pcc = POWERPC_CPU_GET_CLASS(newcpu);
156 if (!CPU(newcpu)->halted) {
157 rtas_st(rets, 0, RTAS_OUT_HW_ERROR);
158 return;
161 cpu_synchronize_state(CPU(newcpu));
163 env->msr = (1ULL << MSR_SF) | (1ULL << MSR_ME);
165 /* Enable Power-saving mode Exit Cause exceptions for the new CPU */
166 lpcr = env->spr[SPR_LPCR];
167 if (!pcc->interrupts_big_endian(callcpu)) {
168 lpcr |= LPCR_ILE;
170 if (env->mmu_model == POWERPC_MMU_3_00) {
172 * New cpus are expected to start in the same radix/hash mode
173 * as the existing CPUs
175 if (ppc64_v3_radix(callcpu)) {
176 lpcr |= LPCR_UPRT | LPCR_GTSE | LPCR_HR;
177 } else {
178 lpcr &= ~(LPCR_UPRT | LPCR_GTSE | LPCR_HR);
180 env->spr[SPR_PSSCR] &= ~PSSCR_EC;
182 ppc_store_lpcr(newcpu, lpcr);
185 * Set the timebase offset of the new CPU to that of the invoking
186 * CPU. This helps hotplugged CPU to have the correct timebase
187 * offset.
189 newcpu->env.tb_env->tb_offset = callcpu->env.tb_env->tb_offset;
191 spapr_cpu_set_entry_state(newcpu, start, r3);
193 qemu_cpu_kick(CPU(newcpu));
195 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
198 static void rtas_stop_self(PowerPCCPU *cpu, SpaprMachineState *spapr,
199 uint32_t token, uint32_t nargs,
200 target_ulong args,
201 uint32_t nret, target_ulong rets)
203 CPUState *cs = CPU(cpu);
204 CPUPPCState *env = &cpu->env;
205 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
207 /* Disable Power-saving mode Exit Cause exceptions for the CPU.
208 * This could deliver an interrupt on a dying CPU and crash the
209 * guest.
210 * For the same reason, set PSSCR_EC.
212 ppc_store_lpcr(cpu, env->spr[SPR_LPCR] & ~pcc->lpcr_pm);
213 env->spr[SPR_PSSCR] |= PSSCR_EC;
214 cs->halted = 1;
215 kvmppc_set_reg_ppc_online(cpu, 0);
216 qemu_cpu_kick(cs);
219 static inline int sysparm_st(target_ulong addr, target_ulong len,
220 const void *val, uint16_t vallen)
222 hwaddr phys = ppc64_phys_to_real(addr);
224 if (len < 2) {
225 return RTAS_OUT_SYSPARM_PARAM_ERROR;
227 stw_be_phys(&address_space_memory, phys, vallen);
228 cpu_physical_memory_write(phys + 2, val, MIN(len - 2, vallen));
229 return RTAS_OUT_SUCCESS;
232 static void rtas_ibm_get_system_parameter(PowerPCCPU *cpu,
233 SpaprMachineState *spapr,
234 uint32_t token, uint32_t nargs,
235 target_ulong args,
236 uint32_t nret, target_ulong rets)
238 MachineState *ms = MACHINE(qdev_get_machine());
239 unsigned int max_cpus = ms->smp.max_cpus;
240 target_ulong parameter = rtas_ld(args, 0);
241 target_ulong buffer = rtas_ld(args, 1);
242 target_ulong length = rtas_ld(args, 2);
243 target_ulong ret;
245 switch (parameter) {
246 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS: {
247 char *param_val = g_strdup_printf("MaxEntCap=%d,"
248 "DesMem=%" PRIu64 ","
249 "DesProcs=%d,"
250 "MaxPlatProcs=%d",
251 max_cpus,
252 current_machine->ram_size / MiB,
253 ms->smp.cpus,
254 max_cpus);
255 ret = sysparm_st(buffer, length, param_val, strlen(param_val) + 1);
256 g_free(param_val);
257 break;
259 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE: {
260 uint8_t param_val = DIAGNOSTICS_RUN_MODE_DISABLED;
262 ret = sysparm_st(buffer, length, &param_val, sizeof(param_val));
263 break;
265 case RTAS_SYSPARM_UUID:
266 ret = sysparm_st(buffer, length, (unsigned char *)&qemu_uuid,
267 (qemu_uuid_set ? 16 : 0));
268 break;
269 default:
270 ret = RTAS_OUT_NOT_SUPPORTED;
273 rtas_st(rets, 0, ret);
276 static void rtas_ibm_set_system_parameter(PowerPCCPU *cpu,
277 SpaprMachineState *spapr,
278 uint32_t token, uint32_t nargs,
279 target_ulong args,
280 uint32_t nret, target_ulong rets)
282 target_ulong parameter = rtas_ld(args, 0);
283 target_ulong ret = RTAS_OUT_NOT_SUPPORTED;
285 switch (parameter) {
286 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS:
287 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE:
288 case RTAS_SYSPARM_UUID:
289 ret = RTAS_OUT_NOT_AUTHORIZED;
290 break;
293 rtas_st(rets, 0, ret);
296 static void rtas_ibm_os_term(PowerPCCPU *cpu,
297 SpaprMachineState *spapr,
298 uint32_t token, uint32_t nargs,
299 target_ulong args,
300 uint32_t nret, target_ulong rets)
302 qemu_system_guest_panicked(NULL);
304 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
307 static void rtas_set_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr,
308 uint32_t token, uint32_t nargs,
309 target_ulong args, uint32_t nret,
310 target_ulong rets)
312 int32_t power_domain;
314 if (nargs != 2 || nret != 2) {
315 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
316 return;
319 /* we currently only use a single, "live insert" powerdomain for
320 * hotplugged/dlpar'd resources, so the power is always live/full (100)
322 power_domain = rtas_ld(args, 0);
323 if (power_domain != -1) {
324 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
325 return;
328 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
329 rtas_st(rets, 1, 100);
332 static void rtas_get_power_level(PowerPCCPU *cpu, SpaprMachineState *spapr,
333 uint32_t token, uint32_t nargs,
334 target_ulong args, uint32_t nret,
335 target_ulong rets)
337 int32_t power_domain;
339 if (nargs != 1 || nret != 2) {
340 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
341 return;
344 /* we currently only use a single, "live insert" powerdomain for
345 * hotplugged/dlpar'd resources, so the power is always live/full (100)
347 power_domain = rtas_ld(args, 0);
348 if (power_domain != -1) {
349 rtas_st(rets, 0, RTAS_OUT_NOT_SUPPORTED);
350 return;
353 rtas_st(rets, 0, RTAS_OUT_SUCCESS);
354 rtas_st(rets, 1, 100);
357 static struct rtas_call {
358 const char *name;
359 spapr_rtas_fn fn;
360 } rtas_table[RTAS_TOKEN_MAX - RTAS_TOKEN_BASE];
362 target_ulong spapr_rtas_call(PowerPCCPU *cpu, SpaprMachineState *spapr,
363 uint32_t token, uint32_t nargs, target_ulong args,
364 uint32_t nret, target_ulong rets)
366 if ((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX)) {
367 struct rtas_call *call = rtas_table + (token - RTAS_TOKEN_BASE);
369 if (call->fn) {
370 call->fn(cpu, spapr, token, nargs, args, nret, rets);
371 return H_SUCCESS;
375 /* HACK: Some Linux early debug code uses RTAS display-character,
376 * but assumes the token value is 0xa (which it is on some real
377 * machines) without looking it up in the device tree. This
378 * special case makes this work */
379 if (token == 0xa) {
380 rtas_display_character(cpu, spapr, 0xa, nargs, args, nret, rets);
381 return H_SUCCESS;
384 hcall_dprintf("Unknown RTAS token 0x%x\n", token);
385 rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
386 return H_PARAMETER;
389 uint64_t qtest_rtas_call(char *cmd, uint32_t nargs, uint64_t args,
390 uint32_t nret, uint64_t rets)
392 int token;
394 for (token = 0; token < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; token++) {
395 if (strcmp(cmd, rtas_table[token].name) == 0) {
396 SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
397 PowerPCCPU *cpu = POWERPC_CPU(first_cpu);
399 rtas_table[token].fn(cpu, spapr, token + RTAS_TOKEN_BASE,
400 nargs, args, nret, rets);
401 return H_SUCCESS;
404 return H_PARAMETER;
407 void spapr_rtas_register(int token, const char *name, spapr_rtas_fn fn)
409 assert((token >= RTAS_TOKEN_BASE) && (token < RTAS_TOKEN_MAX));
411 token -= RTAS_TOKEN_BASE;
413 assert(!name || !rtas_table[token].name);
415 rtas_table[token].name = name;
416 rtas_table[token].fn = fn;
419 void spapr_dt_rtas_tokens(void *fdt, int rtas)
421 int i;
423 for (i = 0; i < RTAS_TOKEN_MAX - RTAS_TOKEN_BASE; i++) {
424 struct rtas_call *call = &rtas_table[i];
426 if (!call->name) {
427 continue;
430 _FDT(fdt_setprop_cell(fdt, rtas, call->name, i + RTAS_TOKEN_BASE));
434 void spapr_load_rtas(SpaprMachineState *spapr, void *fdt, hwaddr addr)
436 int rtas_node;
437 int ret;
439 /* Copy RTAS blob into guest RAM */
440 cpu_physical_memory_write(addr, spapr->rtas_blob, spapr->rtas_size);
442 ret = fdt_add_mem_rsv(fdt, addr, spapr->rtas_size);
443 if (ret < 0) {
444 error_report("Couldn't add RTAS reserve entry: %s",
445 fdt_strerror(ret));
446 exit(1);
449 /* Update the device tree with the blob's location */
450 rtas_node = fdt_path_offset(fdt, "/rtas");
451 assert(rtas_node >= 0);
453 ret = fdt_setprop_cell(fdt, rtas_node, "linux,rtas-base", addr);
454 if (ret < 0) {
455 error_report("Couldn't add linux,rtas-base property: %s",
456 fdt_strerror(ret));
457 exit(1);
460 ret = fdt_setprop_cell(fdt, rtas_node, "linux,rtas-entry", addr);
461 if (ret < 0) {
462 error_report("Couldn't add linux,rtas-entry property: %s",
463 fdt_strerror(ret));
464 exit(1);
467 ret = fdt_setprop_cell(fdt, rtas_node, "rtas-size", spapr->rtas_size);
468 if (ret < 0) {
469 error_report("Couldn't add rtas-size property: %s",
470 fdt_strerror(ret));
471 exit(1);
475 static void core_rtas_register_types(void)
477 spapr_rtas_register(RTAS_DISPLAY_CHARACTER, "display-character",
478 rtas_display_character);
479 spapr_rtas_register(RTAS_POWER_OFF, "power-off", rtas_power_off);
480 spapr_rtas_register(RTAS_SYSTEM_REBOOT, "system-reboot",
481 rtas_system_reboot);
482 spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE, "query-cpu-stopped-state",
483 rtas_query_cpu_stopped_state);
484 spapr_rtas_register(RTAS_START_CPU, "start-cpu", rtas_start_cpu);
485 spapr_rtas_register(RTAS_STOP_SELF, "stop-self", rtas_stop_self);
486 spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER,
487 "ibm,get-system-parameter",
488 rtas_ibm_get_system_parameter);
489 spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER,
490 "ibm,set-system-parameter",
491 rtas_ibm_set_system_parameter);
492 spapr_rtas_register(RTAS_IBM_OS_TERM, "ibm,os-term",
493 rtas_ibm_os_term);
494 spapr_rtas_register(RTAS_SET_POWER_LEVEL, "set-power-level",
495 rtas_set_power_level);
496 spapr_rtas_register(RTAS_GET_POWER_LEVEL, "get-power-level",
497 rtas_get_power_level);
500 type_init(core_rtas_register_types)