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
28 #include "qemu/osdep.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"
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"
47 #include "hw/ppc/spapr_drc.h"
48 #include "qemu/cutils.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
,
58 uint32_t nret
, target_ulong rets
)
60 uint8_t c
= rtas_ld(args
, 0);
61 SpaprVioDevice
*sdev
= vty_lookup(spapr
, 0);
64 rtas_st(rets
, 0, RTAS_OUT_HW_ERROR
);
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
);
79 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN
);
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
,
87 uint32_t nret
, target_ulong rets
)
89 if (nargs
!= 0 || nret
!= 1) {
90 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
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
,
101 uint32_t nret
, target_ulong rets
)
106 if (nargs
!= 1 || nret
!= 2) {
107 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
111 id
= rtas_ld(args
, 0);
112 cpu
= spapr_find_cpu(id
);
114 if (CPU(cpu
)->halted
) {
120 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
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
,
131 uint32_t nret
, target_ulong rets
)
133 target_ulong id
, start
, r3
;
136 PowerPCCPUClass
*pcc
;
139 if (nargs
!= 3 || nret
!= 1) {
140 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
144 id
= rtas_ld(args
, 0);
145 start
= rtas_ld(args
, 1);
146 r3
= rtas_ld(args
, 2);
148 newcpu
= spapr_find_cpu(id
);
150 /* Didn't find a matching cpu */
151 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
156 pcc
= POWERPC_CPU_GET_CLASS(newcpu
);
158 if (!CPU(newcpu
)->halted
) {
159 rtas_st(rets
, 0, RTAS_OUT_HW_ERROR
);
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
)) {
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
;
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
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
,
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
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
;
217 kvmppc_set_reg_ppc_online(cpu
, 0);
221 static void rtas_ibm_suspend_me(PowerPCCPU
*cpu
, SpaprMachineState
*spapr
,
222 uint32_t token
, uint32_t nargs
,
224 uint32_t nret
, target_ulong rets
)
228 if (nargs
!= 0 || nret
!= 1) {
229 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
234 PowerPCCPU
*c
= POWERPC_CPU(cs
);
235 CPUPPCState
*e
= &c
->env
;
241 if (!cs
->halted
|| (e
->msr
& (1ULL << MSR_EE
))) {
242 rtas_st(rets
, 0, H_MULTI_THREADS_ACTIVE
);
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
);
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
,
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);
278 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS
: {
279 char *param_val
= g_strdup_printf("MaxEntCap=%d,"
280 "DesMem=%" PRIu64
","
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
);
301 ret
= sysparm_st(buffer
, length
, param_val
, strlen(param_val
) + 1);
305 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE
: {
306 uint8_t param_val
= DIAGNOSTICS_RUN_MODE_DISABLED
;
308 ret
= sysparm_st(buffer
, length
, ¶m_val
, sizeof(param_val
));
311 case RTAS_SYSPARM_UUID
:
312 ret
= sysparm_st(buffer
, length
, (unsigned char *)&qemu_uuid
,
313 (qemu_uuid_set
? 16 : 0));
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
,
326 uint32_t nret
, target_ulong rets
)
328 target_ulong parameter
= rtas_ld(args
, 0);
329 target_ulong ret
= RTAS_OUT_NOT_SUPPORTED
;
332 case RTAS_SYSPARM_SPLPAR_CHARACTERISTICS
:
333 case RTAS_SYSPARM_DIAGNOSTICS_RUN_MODE
:
334 case RTAS_SYSPARM_UUID
:
335 ret
= RTAS_OUT_NOT_AUTHORIZED
;
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
,
346 uint32_t nret
, target_ulong rets
)
348 target_ulong msgaddr
= rtas_ld(args
, 0);
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
,
365 int32_t power_domain
;
367 if (nargs
!= 2 || nret
!= 2) {
368 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
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
);
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
,
390 int32_t power_domain
;
392 if (nargs
!= 1 || nret
!= 2) {
393 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
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
);
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
,
414 uint32_t nret
, target_ulong rets
)
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
);
424 rtas_addr
= spapr_get_rtas_addr();
426 rtas_st(rets
, 0, RTAS_OUT_NOT_SUPPORTED
);
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
);
440 spapr
->fwnmi_system_reset_addr
= sreset_addr
;
441 spapr
->fwnmi_machine_check_addr
= mce_addr
;
443 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
446 static void rtas_ibm_nmi_interlock(PowerPCCPU
*cpu
,
447 SpaprMachineState
*spapr
,
448 uint32_t token
, uint32_t nargs
,
450 uint32_t nret
, target_ulong rets
)
452 if (spapr_get_cap(spapr
, SPAPR_CAP_FWNMI
) == SPAPR_CAP_OFF
) {
453 rtas_st(rets
, 0, RTAS_OUT_NOT_SUPPORTED
);
457 if (spapr
->fwnmi_machine_check_addr
== -1) {
458 /* NMI register not called */
459 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
463 if (spapr
->fwnmi_machine_check_interlock
!= cpu
->vcpu_id
) {
465 * The vCPU that hit the NMI should invoke "ibm,nmi-interlock"
466 * This should be PARAM_ERROR, but Linux calls "ibm,nmi-interlock"
467 * for system reset interrupts, despite them not being interlocked.
468 * PowerVM silently ignores this and returns success here. Returning
469 * failure causes Linux to print the error "FWNMI: nmi-interlock
470 * failed: -3", although no other apparent ill effects, this is a
471 * regression for the user when enabling FWNMI. So for now, match
472 * PowerVM. When most Linux clients are fixed, this could be
475 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
480 * vCPU issuing "ibm,nmi-interlock" is done with NMI handling,
481 * hence unset fwnmi_machine_check_interlock.
483 spapr
->fwnmi_machine_check_interlock
= -1;
484 qemu_cond_signal(&spapr
->fwnmi_machine_check_interlock_cond
);
485 rtas_st(rets
, 0, RTAS_OUT_SUCCESS
);
486 migrate_del_blocker(spapr
->fwnmi_migration_blocker
);
489 static struct rtas_call
{
492 } rtas_table
[RTAS_TOKEN_MAX
- RTAS_TOKEN_BASE
];
494 target_ulong
spapr_rtas_call(PowerPCCPU
*cpu
, SpaprMachineState
*spapr
,
495 uint32_t token
, uint32_t nargs
, target_ulong args
,
496 uint32_t nret
, target_ulong rets
)
498 if ((token
>= RTAS_TOKEN_BASE
) && (token
< RTAS_TOKEN_MAX
)) {
499 struct rtas_call
*call
= rtas_table
+ (token
- RTAS_TOKEN_BASE
);
502 call
->fn(cpu
, spapr
, token
, nargs
, args
, nret
, rets
);
507 /* HACK: Some Linux early debug code uses RTAS display-character,
508 * but assumes the token value is 0xa (which it is on some real
509 * machines) without looking it up in the device tree. This
510 * special case makes this work */
512 rtas_display_character(cpu
, spapr
, 0xa, nargs
, args
, nret
, rets
);
516 hcall_dprintf("Unknown RTAS token 0x%x\n", token
);
517 rtas_st(rets
, 0, RTAS_OUT_PARAM_ERROR
);
521 uint64_t qtest_rtas_call(char *cmd
, uint32_t nargs
, uint64_t args
,
522 uint32_t nret
, uint64_t rets
)
526 for (token
= 0; token
< RTAS_TOKEN_MAX
- RTAS_TOKEN_BASE
; token
++) {
527 if (strcmp(cmd
, rtas_table
[token
].name
) == 0) {
528 SpaprMachineState
*spapr
= SPAPR_MACHINE(qdev_get_machine());
529 PowerPCCPU
*cpu
= POWERPC_CPU(first_cpu
);
531 rtas_table
[token
].fn(cpu
, spapr
, token
+ RTAS_TOKEN_BASE
,
532 nargs
, args
, nret
, rets
);
539 void spapr_rtas_register(int token
, const char *name
, spapr_rtas_fn fn
)
541 assert((token
>= RTAS_TOKEN_BASE
) && (token
< RTAS_TOKEN_MAX
));
543 token
-= RTAS_TOKEN_BASE
;
545 assert(!name
|| !rtas_table
[token
].name
);
547 rtas_table
[token
].name
= name
;
548 rtas_table
[token
].fn
= fn
;
551 void spapr_dt_rtas_tokens(void *fdt
, int rtas
)
555 for (i
= 0; i
< RTAS_TOKEN_MAX
- RTAS_TOKEN_BASE
; i
++) {
556 struct rtas_call
*call
= &rtas_table
[i
];
562 _FDT(fdt_setprop_cell(fdt
, rtas
, call
->name
, i
+ RTAS_TOKEN_BASE
));
566 hwaddr
spapr_get_rtas_addr(void)
568 SpaprMachineState
*spapr
= SPAPR_MACHINE(qdev_get_machine());
570 const fdt32_t
*rtas_data
;
571 void *fdt
= spapr
->fdt_blob
;
573 /* fetch rtas addr from fdt */
574 rtas_node
= fdt_path_offset(fdt
, "/rtas");
579 rtas_data
= fdt_getprop(fdt
, rtas_node
, "linux,rtas-base", NULL
);
585 * We assume that the OS called RTAS instantiate-rtas, but some other
586 * OS might call RTAS instantiate-rtas-64 instead. This fine as of now
587 * as SLOF only supports 32-bit variant.
589 return (hwaddr
)fdt32_to_cpu(*rtas_data
);
592 static void core_rtas_register_types(void)
594 spapr_rtas_register(RTAS_DISPLAY_CHARACTER
, "display-character",
595 rtas_display_character
);
596 spapr_rtas_register(RTAS_POWER_OFF
, "power-off", rtas_power_off
);
597 spapr_rtas_register(RTAS_SYSTEM_REBOOT
, "system-reboot",
599 spapr_rtas_register(RTAS_QUERY_CPU_STOPPED_STATE
, "query-cpu-stopped-state",
600 rtas_query_cpu_stopped_state
);
601 spapr_rtas_register(RTAS_START_CPU
, "start-cpu", rtas_start_cpu
);
602 spapr_rtas_register(RTAS_STOP_SELF
, "stop-self", rtas_stop_self
);
603 spapr_rtas_register(RTAS_IBM_SUSPEND_ME
, "ibm,suspend-me",
604 rtas_ibm_suspend_me
);
605 spapr_rtas_register(RTAS_IBM_GET_SYSTEM_PARAMETER
,
606 "ibm,get-system-parameter",
607 rtas_ibm_get_system_parameter
);
608 spapr_rtas_register(RTAS_IBM_SET_SYSTEM_PARAMETER
,
609 "ibm,set-system-parameter",
610 rtas_ibm_set_system_parameter
);
611 spapr_rtas_register(RTAS_IBM_OS_TERM
, "ibm,os-term",
613 spapr_rtas_register(RTAS_SET_POWER_LEVEL
, "set-power-level",
614 rtas_set_power_level
);
615 spapr_rtas_register(RTAS_GET_POWER_LEVEL
, "get-power-level",
616 rtas_get_power_level
);
617 spapr_rtas_register(RTAS_IBM_NMI_REGISTER
, "ibm,nmi-register",
618 rtas_ibm_nmi_register
);
619 spapr_rtas_register(RTAS_IBM_NMI_INTERLOCK
, "ibm,nmi-interlock",
620 rtas_ibm_nmi_interlock
);
623 type_init(core_rtas_register_types
)