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
27 #include "qemu/osdep.h"
30 #include "qemu/error-report.h"
31 #include "sysemu/sysemu.h"
33 #include "sysemu/device_tree.h"
34 #include "sysemu/cpus.h"
35 #include "sysemu/hw_accel.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"
46 #include "hw/ppc/spapr_drc.h"
47 #include "qemu/cutils.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
,
56 uint32_t nret
, target_ulong rets
)
58 uint8_t c
= rtas_ld(args
, 0);
59 SpaprVioDevice
*sdev
= vty_lookup(spapr
, 0);
62 rtas_st(rets
, 0, RTAS_OUT_HW_ERROR
);
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
);
77 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN
);
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
,
85 uint32_t nret
, target_ulong rets
)
87 if (nargs
!= 0 || nret
!= 1) {
88 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
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
,
99 uint32_t nret
, target_ulong rets
)
104 if (nargs
!= 1 || nret
!= 2) {
105 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
109 id
= rtas_ld(args
, 0);
110 cpu
= spapr_find_cpu(id
);
112 if (CPU(cpu
)->halted
) {
118 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
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
,
129 uint32_t nret
, target_ulong rets
)
131 target_ulong id
, start
, r3
;
134 PowerPCCPUClass
*pcc
;
137 if (nargs
!= 3 || nret
!= 1) {
138 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
142 id
= rtas_ld(args
, 0);
143 start
= rtas_ld(args
, 1);
144 r3
= rtas_ld(args
, 2);
146 newcpu
= spapr_find_cpu(id
);
148 /* Didn't find a matching cpu */
149 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
154 pcc
= POWERPC_CPU_GET_CLASS(newcpu
);
156 if (!CPU(newcpu
)->halted
) {
157 rtas_st(rets
, 0, RTAS_OUT_HW_ERROR
);
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
)) {
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
;
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
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
,
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
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
;
215 kvmppc_set_reg_ppc_online(cpu
, 0);
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
);
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
,
236 uint32_t nret
, target_ulong rets
)
238 target_ulong parameter
= rtas_ld(args
, 0);
239 target_ulong buffer
= rtas_ld(args
, 1);
240 target_ulong length
= rtas_ld(args
, 2);
244 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS
: {
245 char *param_val
= g_strdup_printf("MaxEntCap=%d,"
246 "DesMem=%" PRIu64
","
250 current_machine
->ram_size
/ MiB
,
253 ret
= sysparm_st(buffer
, length
, param_val
, strlen(param_val
) + 1);
257 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE
: {
258 uint8_t param_val
= DIAGNOSTICS_RUN_MODE_DISABLED
;
260 ret
= sysparm_st(buffer
, length
, ¶m_val
, sizeof(param_val
));
263 case RTAS_SYSPARM_UUID
:
264 ret
= sysparm_st(buffer
, length
, (unsigned char *)&qemu_uuid
,
265 (qemu_uuid_set
? 16 : 0));
268 ret
= RTAS_OUT_NOT_SUPPORTED
;
271 rtas_st(rets
, 0, ret
);
274 static void rtas_ibm_set_system_parameter(PowerPCCPU
*cpu
,
275 SpaprMachineState
*spapr
,
276 uint32_t token
, uint32_t nargs
,
278 uint32_t nret
, target_ulong rets
)
280 target_ulong parameter
= rtas_ld(args
, 0);
281 target_ulong ret
= RTAS_OUT_NOT_SUPPORTED
;
284 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS
:
285 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE
:
286 case RTAS_SYSPARM_UUID
:
287 ret
= RTAS_OUT_NOT_AUTHORIZED
;
291 rtas_st(rets
, 0, ret
);
294 static void rtas_ibm_os_term(PowerPCCPU
*cpu
,
295 SpaprMachineState
*spapr
,
296 uint32_t token
, uint32_t nargs
,
298 uint32_t nret
, target_ulong rets
)
300 qemu_system_guest_panicked(NULL
);
302 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
305 static void rtas_set_power_level(PowerPCCPU
*cpu
, SpaprMachineState
*spapr
,
306 uint32_t token
, uint32_t nargs
,
307 target_ulong args
, uint32_t nret
,
310 int32_t power_domain
;
312 if (nargs
!= 2 || nret
!= 2) {
313 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
317 /* we currently only use a single, "live insert" powerdomain for
318 * hotplugged/dlpar'd resources, so the power is always live/full (100)
320 power_domain
= rtas_ld(args
, 0);
321 if (power_domain
!= -1) {
322 rtas_st(rets
, 0, RTAS_OUT_NOT_SUPPORTED
);
326 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
327 rtas_st(rets
, 1, 100);
330 static void rtas_get_power_level(PowerPCCPU
*cpu
, SpaprMachineState
*spapr
,
331 uint32_t token
, uint32_t nargs
,
332 target_ulong args
, uint32_t nret
,
335 int32_t power_domain
;
337 if (nargs
!= 1 || nret
!= 2) {
338 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
342 /* we currently only use a single, "live insert" powerdomain for
343 * hotplugged/dlpar'd resources, so the power is always live/full (100)
345 power_domain
= rtas_ld(args
, 0);
346 if (power_domain
!= -1) {
347 rtas_st(rets
, 0, RTAS_OUT_NOT_SUPPORTED
);
351 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
352 rtas_st(rets
, 1, 100);
355 static struct rtas_call
{
358 } rtas_table
[RTAS_TOKEN_MAX
- RTAS_TOKEN_BASE
];
360 target_ulong
spapr_rtas_call(PowerPCCPU
*cpu
, SpaprMachineState
*spapr
,
361 uint32_t token
, uint32_t nargs
, target_ulong args
,
362 uint32_t nret
, target_ulong rets
)
364 if ((token
>= RTAS_TOKEN_BASE
) && (token
< RTAS_TOKEN_MAX
)) {
365 struct rtas_call
*call
= rtas_table
+ (token
- RTAS_TOKEN_BASE
);
368 call
->fn(cpu
, spapr
, token
, nargs
, args
, nret
, rets
);
373 /* HACK: Some Linux early debug code uses RTAS display-character,
374 * but assumes the token value is 0xa (which it is on some real
375 * machines) without looking it up in the device tree. This
376 * special case makes this work */
378 rtas_display_character(cpu
, spapr
, 0xa, nargs
, args
, nret
, rets
);
382 hcall_dprintf("Unknown RTAS token 0x%x\n", token
);
383 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
387 uint64_t qtest_rtas_call(char *cmd
, uint32_t nargs
, uint64_t args
,
388 uint32_t nret
, uint64_t rets
)
392 for (token
= 0; token
< RTAS_TOKEN_MAX
- RTAS_TOKEN_BASE
; token
++) {
393 if (strcmp(cmd
, rtas_table
[token
].name
) == 0) {
394 SpaprMachineState
*spapr
= SPAPR_MACHINE(qdev_get_machine());
395 PowerPCCPU
*cpu
= POWERPC_CPU(first_cpu
);
397 rtas_table
[token
].fn(cpu
, spapr
, token
+ RTAS_TOKEN_BASE
,
398 nargs
, args
, nret
, rets
);
405 void spapr_rtas_register(int token
, const char *name
, spapr_rtas_fn fn
)
407 assert((token
>= RTAS_TOKEN_BASE
) && (token
< RTAS_TOKEN_MAX
));
409 token
-= RTAS_TOKEN_BASE
;
411 assert(!name
|| !rtas_table
[token
].name
);
413 rtas_table
[token
].name
= name
;
414 rtas_table
[token
].fn
= fn
;
417 void spapr_dt_rtas_tokens(void *fdt
, int rtas
)
421 for (i
= 0; i
< RTAS_TOKEN_MAX
- RTAS_TOKEN_BASE
; i
++) {
422 struct rtas_call
*call
= &rtas_table
[i
];
428 _FDT(fdt_setprop_cell(fdt
, rtas
, call
->name
, i
+ RTAS_TOKEN_BASE
));
432 void spapr_load_rtas(SpaprMachineState
*spapr
, void *fdt
, hwaddr addr
)
437 /* Copy RTAS blob into guest RAM */
438 cpu_physical_memory_write(addr
, spapr
->rtas_blob
, spapr
->rtas_size
);
440 ret
= fdt_add_mem_rsv(fdt
, addr
, spapr
->rtas_size
);
442 error_report("Couldn't add RTAS reserve entry: %s",
447 /* Update the device tree with the blob's location */
448 rtas_node
= fdt_path_offset(fdt
, "/rtas");
449 assert(rtas_node
>= 0);
451 ret
= fdt_setprop_cell(fdt
, rtas_node
, "linux,rtas-base", addr
);
453 error_report("Couldn't add linux,rtas-base property: %s",
458 ret
= fdt_setprop_cell(fdt
, rtas_node
, "linux,rtas-entry", addr
);
460 error_report("Couldn't add linux,rtas-entry property: %s",
465 ret
= fdt_setprop_cell(fdt
, rtas_node
, "rtas-size", spapr
->rtas_size
);
467 error_report("Couldn't add rtas-size property: %s",
473 static void core_rtas_register_types(void)
475 spapr_rtas_register(RTAS_DISPLAY_CHARACTER
, "display-character",
476 rtas_display_character
);
477 spapr_rtas_register(RTAS_POWER_OFF
, "power-off", rtas_power_off
);
478 spapr_rtas_register(RTAS_SYSTEM_REBOOT
, "system-reboot",
480 spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE
, "query-cpu-stopped-state",
481 rtas_query_cpu_stopped_state
);
482 spapr_rtas_register(RTAS_START_CPU
, "start-cpu", rtas_start_cpu
);
483 spapr_rtas_register(RTAS_STOP_SELF
, "stop-self", rtas_stop_self
);
484 spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER
,
485 "ibm,get-system-parameter",
486 rtas_ibm_get_system_parameter
);
487 spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER
,
488 "ibm,set-system-parameter",
489 rtas_ibm_set_system_parameter
);
490 spapr_rtas_register(RTAS_IBM_OS_TERM
, "ibm,os-term",
492 spapr_rtas_register(RTAS_SET_POWER_LEVEL
, "set-power-level",
493 rtas_set_power_level
);
494 spapr_rtas_register(RTAS_GET_POWER_LEVEL
, "get-power-level",
495 rtas_get_power_level
);
498 type_init(core_rtas_register_types
)