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machine: rename MemoryHotplugState to DeviceMemoryState
[qemu.git] / hw / ppc / spapr_hcall.c
blob022f6d8101822e937988d24ec7d5521e7feefdf9
1 #include "qemu/osdep.h"
2 #include "qapi/error.h"
3 #include "sysemu/hw_accel.h"
4 #include "sysemu/sysemu.h"
5 #include "qemu/log.h"
6 #include "qemu/error-report.h"
7 #include "cpu.h"
8 #include "exec/exec-all.h"
9 #include "helper_regs.h"
10 #include "hw/ppc/spapr.h"
11 #include "mmu-hash64.h"
12 #include "cpu-models.h"
13 #include "trace.h"
14 #include "kvm_ppc.h"
15 #include "hw/ppc/spapr_ovec.h"
16 #include "mmu-book3s-v3.h"
17 #include "hw/mem/memory-device.h"
18
19 struct LPCRSyncState {
20 target_ulong value;
21 target_ulong mask;
22 };
23
24 static void do_lpcr_sync(CPUState *cs, run_on_cpu_data arg)
25 {
26 struct LPCRSyncState *s = arg.host_ptr;
27 PowerPCCPU *cpu = POWERPC_CPU(cs);
28 CPUPPCState *env = &cpu->env;
29 target_ulong lpcr;
30
31 cpu_synchronize_state(cs);
32 lpcr = env->spr[SPR_LPCR];
33 lpcr &= ~s->mask;
34 lpcr |= s->value;
35 ppc_store_lpcr(cpu, lpcr);
36 }
37
38 static void set_all_lpcrs(target_ulong value, target_ulong mask)
39 {
40 CPUState *cs;
41 struct LPCRSyncState s = {
42 .value = value,
43 .mask = mask
44 };
45 CPU_FOREACH(cs) {
46 run_on_cpu(cs, do_lpcr_sync, RUN_ON_CPU_HOST_PTR(&s));
47 }
48 }
49
50 static bool has_spr(PowerPCCPU *cpu, int spr)
51 {
52 /* We can test whether the SPR is defined by checking for a valid name */
53 return cpu->env.spr_cb[spr].name != NULL;
54 }
55
56 static inline bool valid_ptex(PowerPCCPU *cpu, target_ulong ptex)
57 {
58 /*
59 * hash value/pteg group index is normalized by HPT mask
60 */
61 if (((ptex & ~7ULL) / HPTES_PER_GROUP) & ~ppc_hash64_hpt_mask(cpu)) {
62 return false;
63 }
64 return true;
65 }
66
67 static bool is_ram_address(sPAPRMachineState *spapr, hwaddr addr)
68 {
69 MachineState *machine = MACHINE(spapr);
70 DeviceMemoryState *dms = machine->device_memory;
71
72 if (addr < machine->ram_size) {
73 return true;
74 }
75 if ((addr >= dms->base)
76 && ((addr - dms->base) < memory_region_size(&dms->mr))) {
77 return true;
78 }
79
80 return false;
81 }
82
83 static target_ulong h_enter(PowerPCCPU *cpu, sPAPRMachineState *spapr,
84 target_ulong opcode, target_ulong *args)
85 {
86 target_ulong flags = args[0];
87 target_ulong ptex = args[1];
88 target_ulong pteh = args[2];
89 target_ulong ptel = args[3];
90 unsigned apshift;
91 target_ulong raddr;
92 target_ulong slot;
93 const ppc_hash_pte64_t *hptes;
94
95 apshift = ppc_hash64_hpte_page_shift_noslb(cpu, pteh, ptel);
96 if (!apshift) {
97 /* Bad page size encoding */
98 return H_PARAMETER;
99 }
100
101 raddr = (ptel & HPTE64_R_RPN) & ~((1ULL << apshift) - 1);
102
103 if (is_ram_address(spapr, raddr)) {
104 /* Regular RAM - should have WIMG=0010 */
105 if ((ptel & HPTE64_R_WIMG) != HPTE64_R_M) {
106 return H_PARAMETER;
107 }
108 } else {
109 target_ulong wimg_flags;
110 /* Looks like an IO address */
111 /* FIXME: What WIMG combinations could be sensible for IO?
112 * For now we allow WIMG=010x, but are there others? */
113 /* FIXME: Should we check against registered IO addresses? */
114 wimg_flags = (ptel & (HPTE64_R_W | HPTE64_R_I | HPTE64_R_M));
115
116 if (wimg_flags != HPTE64_R_I &&
117 wimg_flags != (HPTE64_R_I | HPTE64_R_M)) {
118 return H_PARAMETER;
119 }
120 }
121
122 pteh &= ~0x60ULL;
123
124 if (!valid_ptex(cpu, ptex)) {
125 return H_PARAMETER;
126 }
127
128 slot = ptex & 7ULL;
129 ptex = ptex & ~7ULL;
130
131 if (likely((flags & H_EXACT) == 0)) {
132 hptes = ppc_hash64_map_hptes(cpu, ptex, HPTES_PER_GROUP);
133 for (slot = 0; slot < 8; slot++) {
134 if (!(ppc_hash64_hpte0(cpu, hptes, slot) & HPTE64_V_VALID)) {
135 break;
136 }
137 }
138 ppc_hash64_unmap_hptes(cpu, hptes, ptex, HPTES_PER_GROUP);
139 if (slot == 8) {
140 return H_PTEG_FULL;
141 }
142 } else {
143 hptes = ppc_hash64_map_hptes(cpu, ptex + slot, 1);
144 if (ppc_hash64_hpte0(cpu, hptes, 0) & HPTE64_V_VALID) {
145 ppc_hash64_unmap_hptes(cpu, hptes, ptex + slot, 1);
146 return H_PTEG_FULL;
147 }
148 ppc_hash64_unmap_hptes(cpu, hptes, ptex, 1);
149 }
150
151 ppc_hash64_store_hpte(cpu, ptex + slot, pteh | HPTE64_V_HPTE_DIRTY, ptel);
152
153 args[0] = ptex + slot;
154 return H_SUCCESS;
155 }
156
157 typedef enum {
158 REMOVE_SUCCESS = 0,
159 REMOVE_NOT_FOUND = 1,
160 REMOVE_PARM = 2,
161 REMOVE_HW = 3,
162 } RemoveResult;
163
164 static RemoveResult remove_hpte(PowerPCCPU *cpu, target_ulong ptex,
165 target_ulong avpn,
166 target_ulong flags,
167 target_ulong *vp, target_ulong *rp)
168 {
169 const ppc_hash_pte64_t *hptes;
170 target_ulong v, r;
171
172 if (!valid_ptex(cpu, ptex)) {
173 return REMOVE_PARM;
174 }
175
176 hptes = ppc_hash64_map_hptes(cpu, ptex, 1);
177 v = ppc_hash64_hpte0(cpu, hptes, 0);
178 r = ppc_hash64_hpte1(cpu, hptes, 0);
179 ppc_hash64_unmap_hptes(cpu, hptes, ptex, 1);
180
181 if ((v & HPTE64_V_VALID) == 0 ||
182 ((flags & H_AVPN) && (v & ~0x7fULL) != avpn) ||
183 ((flags & H_ANDCOND) && (v & avpn) != 0)) {
184 return REMOVE_NOT_FOUND;
185 }
186 *vp = v;
187 *rp = r;
188 ppc_hash64_store_hpte(cpu, ptex, HPTE64_V_HPTE_DIRTY, 0);
189 ppc_hash64_tlb_flush_hpte(cpu, ptex, v, r);
190 return REMOVE_SUCCESS;
191 }
192
193 static target_ulong h_remove(PowerPCCPU *cpu, sPAPRMachineState *spapr,
194 target_ulong opcode, target_ulong *args)
195 {
196 CPUPPCState *env = &cpu->env;
197 target_ulong flags = args[0];
198 target_ulong ptex = args[1];
199 target_ulong avpn = args[2];
200 RemoveResult ret;
201
202 ret = remove_hpte(cpu, ptex, avpn, flags,
203 &args[0], &args[1]);
204
205 switch (ret) {
206 case REMOVE_SUCCESS:
207 check_tlb_flush(env, true);
208 return H_SUCCESS;
209
210 case REMOVE_NOT_FOUND:
211 return H_NOT_FOUND;
212
213 case REMOVE_PARM:
214 return H_PARAMETER;
215
216 case REMOVE_HW:
217 return H_HARDWARE;
218 }
219
220 g_assert_not_reached();
221 }
222
223 #define H_BULK_REMOVE_TYPE 0xc000000000000000ULL
224 #define H_BULK_REMOVE_REQUEST 0x4000000000000000ULL
225 #define H_BULK_REMOVE_RESPONSE 0x8000000000000000ULL
226 #define H_BULK_REMOVE_END 0xc000000000000000ULL
227 #define H_BULK_REMOVE_CODE 0x3000000000000000ULL
228 #define H_BULK_REMOVE_SUCCESS 0x0000000000000000ULL
229 #define H_BULK_REMOVE_NOT_FOUND 0x1000000000000000ULL
230 #define H_BULK_REMOVE_PARM 0x2000000000000000ULL
231 #define H_BULK_REMOVE_HW 0x3000000000000000ULL
232 #define H_BULK_REMOVE_RC 0x0c00000000000000ULL
233 #define H_BULK_REMOVE_FLAGS 0x0300000000000000ULL
234 #define H_BULK_REMOVE_ABSOLUTE 0x0000000000000000ULL
235 #define H_BULK_REMOVE_ANDCOND 0x0100000000000000ULL
236 #define H_BULK_REMOVE_AVPN 0x0200000000000000ULL
237 #define H_BULK_REMOVE_PTEX 0x00ffffffffffffffULL
238
239 #define H_BULK_REMOVE_MAX_BATCH 4
240
241 static target_ulong h_bulk_remove(PowerPCCPU *cpu, sPAPRMachineState *spapr,
242 target_ulong opcode, target_ulong *args)
243 {
244 CPUPPCState *env = &cpu->env;
245 int i;
246 target_ulong rc = H_SUCCESS;
247
248 for (i = 0; i < H_BULK_REMOVE_MAX_BATCH; i++) {
249 target_ulong *tsh = &args[i*2];
250 target_ulong tsl = args[i*2 + 1];
251 target_ulong v, r, ret;
252
253 if ((*tsh & H_BULK_REMOVE_TYPE) == H_BULK_REMOVE_END) {
254 break;
255 } else if ((*tsh & H_BULK_REMOVE_TYPE) != H_BULK_REMOVE_REQUEST) {
256 return H_PARAMETER;
257 }
258
259 *tsh &= H_BULK_REMOVE_PTEX | H_BULK_REMOVE_FLAGS;
260 *tsh |= H_BULK_REMOVE_RESPONSE;
261
262 if ((*tsh & H_BULK_REMOVE_ANDCOND) && (*tsh & H_BULK_REMOVE_AVPN)) {
263 *tsh |= H_BULK_REMOVE_PARM;
264 return H_PARAMETER;
265 }
266
267 ret = remove_hpte(cpu, *tsh & H_BULK_REMOVE_PTEX, tsl,
268 (*tsh & H_BULK_REMOVE_FLAGS) >> 26,
269 &v, &r);
270
271 *tsh |= ret << 60;
272
273 switch (ret) {
274 case REMOVE_SUCCESS:
275 *tsh |= (r & (HPTE64_R_C | HPTE64_R_R)) << 43;
276 break;
277
278 case REMOVE_PARM:
279 rc = H_PARAMETER;
280 goto exit;
281
282 case REMOVE_HW:
283 rc = H_HARDWARE;
284 goto exit;
285 }
286 }
287 exit:
288 check_tlb_flush(env, true);
289
290 return rc;
291 }
292
293 static target_ulong h_protect(PowerPCCPU *cpu, sPAPRMachineState *spapr,
294 target_ulong opcode, target_ulong *args)
295 {
296 CPUPPCState *env = &cpu->env;
297 target_ulong flags = args[0];
298 target_ulong ptex = args[1];
299 target_ulong avpn = args[2];
300 const ppc_hash_pte64_t *hptes;
301 target_ulong v, r;
302
303 if (!valid_ptex(cpu, ptex)) {
304 return H_PARAMETER;
305 }
306
307 hptes = ppc_hash64_map_hptes(cpu, ptex, 1);
308 v = ppc_hash64_hpte0(cpu, hptes, 0);
309 r = ppc_hash64_hpte1(cpu, hptes, 0);
310 ppc_hash64_unmap_hptes(cpu, hptes, ptex, 1);
311
312 if ((v & HPTE64_V_VALID) == 0 ||
313 ((flags & H_AVPN) && (v & ~0x7fULL) != avpn)) {
314 return H_NOT_FOUND;
315 }
316
317 r &= ~(HPTE64_R_PP0 | HPTE64_R_PP | HPTE64_R_N |
318 HPTE64_R_KEY_HI | HPTE64_R_KEY_LO);
319 r |= (flags << 55) & HPTE64_R_PP0;
320 r |= (flags << 48) & HPTE64_R_KEY_HI;
321 r |= flags & (HPTE64_R_PP | HPTE64_R_N | HPTE64_R_KEY_LO);
322 ppc_hash64_store_hpte(cpu, ptex,
323 (v & ~HPTE64_V_VALID) | HPTE64_V_HPTE_DIRTY, 0);
324 ppc_hash64_tlb_flush_hpte(cpu, ptex, v, r);
325 /* Flush the tlb */
326 check_tlb_flush(env, true);
327 /* Don't need a memory barrier, due to qemu's global lock */
328 ppc_hash64_store_hpte(cpu, ptex, v | HPTE64_V_HPTE_DIRTY, r);
329 return H_SUCCESS;
330 }
331
332 static target_ulong h_read(PowerPCCPU *cpu, sPAPRMachineState *spapr,
333 target_ulong opcode, target_ulong *args)
334 {
335 target_ulong flags = args[0];
336 target_ulong ptex = args[1];
337 uint8_t *hpte;
338 int i, ridx, n_entries = 1;
339
340 if (!valid_ptex(cpu, ptex)) {
341 return H_PARAMETER;
342 }
343
344 if (flags & H_READ_4) {
345 /* Clear the two low order bits */
346 ptex &= ~(3ULL);
347 n_entries = 4;
348 }
349
350 hpte = spapr->htab + (ptex * HASH_PTE_SIZE_64);
351
352 for (i = 0, ridx = 0; i < n_entries; i++) {
353 args[ridx++] = ldq_p(hpte);
354 args[ridx++] = ldq_p(hpte + (HASH_PTE_SIZE_64/2));
355 hpte += HASH_PTE_SIZE_64;
356 }
357
358 return H_SUCCESS;
359 }
360
361 struct sPAPRPendingHPT {
362 /* These fields are read-only after initialization */
363 int shift;
364 QemuThread thread;
365
366 /* These fields are protected by the BQL */
367 bool complete;
368
369 /* These fields are private to the preparation thread if
370 * !complete, otherwise protected by the BQL */
371 int ret;
372 void *hpt;
373 };
374
375 static void free_pending_hpt(sPAPRPendingHPT *pending)
376 {
377 if (pending->hpt) {
378 qemu_vfree(pending->hpt);
379 }
380
381 g_free(pending);
382 }
383
384 static void *hpt_prepare_thread(void *opaque)
385 {
386 sPAPRPendingHPT *pending = opaque;
387 size_t size = 1ULL << pending->shift;
388
389 pending->hpt = qemu_memalign(size, size);
390 if (pending->hpt) {
391 memset(pending->hpt, 0, size);
392 pending->ret = H_SUCCESS;
393 } else {
394 pending->ret = H_NO_MEM;
395 }
396
397 qemu_mutex_lock_iothread();
398
399 if (SPAPR_MACHINE(qdev_get_machine())->pending_hpt == pending) {
400 /* Ready to go */
401 pending->complete = true;
402 } else {
403 /* We've been cancelled, clean ourselves up */
404 free_pending_hpt(pending);
405 }
406
407 qemu_mutex_unlock_iothread();
408 return NULL;
409 }
410
411 /* Must be called with BQL held */
412 static void cancel_hpt_prepare(sPAPRMachineState *spapr)
413 {
414 sPAPRPendingHPT *pending = spapr->pending_hpt;
415
416 /* Let the thread know it's cancelled */
417 spapr->pending_hpt = NULL;
418
419 if (!pending) {
420 /* Nothing to do */
421 return;
422 }
423
424 if (!pending->complete) {
425 /* thread will clean itself up */
426 return;
427 }
428
429 free_pending_hpt(pending);
430 }
431
432 /* Convert a return code from the KVM ioctl()s implementing resize HPT
433 * into a PAPR hypercall return code */
434 static target_ulong resize_hpt_convert_rc(int ret)
435 {
436 if (ret >= 100000) {
437 return H_LONG_BUSY_ORDER_100_SEC;
438 } else if (ret >= 10000) {
439 return H_LONG_BUSY_ORDER_10_SEC;
440 } else if (ret >= 1000) {
441 return H_LONG_BUSY_ORDER_1_SEC;
442 } else if (ret >= 100) {
443 return H_LONG_BUSY_ORDER_100_MSEC;
444 } else if (ret >= 10) {
445 return H_LONG_BUSY_ORDER_10_MSEC;
446 } else if (ret > 0) {
447 return H_LONG_BUSY_ORDER_1_MSEC;
448 }
449
450 switch (ret) {
451 case 0:
452 return H_SUCCESS;
453 case -EPERM:
454 return H_AUTHORITY;
455 case -EINVAL:
456 return H_PARAMETER;
457 case -ENXIO:
458 return H_CLOSED;
459 case -ENOSPC:
460 return H_PTEG_FULL;
461 case -EBUSY:
462 return H_BUSY;
463 case -ENOMEM:
464 return H_NO_MEM;
465 default:
466 return H_HARDWARE;
467 }
468 }
469
470 static target_ulong h_resize_hpt_prepare(PowerPCCPU *cpu,
471 sPAPRMachineState *spapr,
472 target_ulong opcode,
473 target_ulong *args)
474 {
475 target_ulong flags = args[0];
476 int shift = args[1];
477 sPAPRPendingHPT *pending = spapr->pending_hpt;
478 uint64_t current_ram_size;
479 int rc;
480
481 if (spapr->resize_hpt == SPAPR_RESIZE_HPT_DISABLED) {
482 return H_AUTHORITY;
483 }
484
485 if (!spapr->htab_shift) {
486 /* Radix guest, no HPT */
487 return H_NOT_AVAILABLE;
488 }
489
490 trace_spapr_h_resize_hpt_prepare(flags, shift);
491
492 if (flags != 0) {
493 return H_PARAMETER;
494 }
495
496 if (shift && ((shift < 18) || (shift > 46))) {
497 return H_PARAMETER;
498 }
499
500 current_ram_size = MACHINE(spapr)->ram_size + get_plugged_memory_size();
501
502 /* We only allow the guest to allocate an HPT one order above what
503 * we'd normally give them (to stop a small guest claiming a huge
504 * chunk of resources in the HPT */
505 if (shift > (spapr_hpt_shift_for_ramsize(current_ram_size) + 1)) {
506 return H_RESOURCE;
507 }
508
509 rc = kvmppc_resize_hpt_prepare(cpu, flags, shift);
510 if (rc != -ENOSYS) {
511 return resize_hpt_convert_rc(rc);
512 }
513
514 if (pending) {
515 /* something already in progress */
516 if (pending->shift == shift) {
517 /* and it's suitable */
518 if (pending->complete) {
519 return pending->ret;
520 } else {
521 return H_LONG_BUSY_ORDER_100_MSEC;
522 }
523 }
524
525 /* not suitable, cancel and replace */
526 cancel_hpt_prepare(spapr);
527 }
528
529 if (!shift) {
530 /* nothing to do */
531 return H_SUCCESS;
532 }
533
534 /* start new prepare */
535
536 pending = g_new0(sPAPRPendingHPT, 1);
537 pending->shift = shift;
538 pending->ret = H_HARDWARE;
539
540 qemu_thread_create(&pending->thread, "sPAPR HPT prepare",
541 hpt_prepare_thread, pending, QEMU_THREAD_DETACHED);
542
543 spapr->pending_hpt = pending;
544
545 /* In theory we could estimate the time more accurately based on
546 * the new size, but there's not much point */
547 return H_LONG_BUSY_ORDER_100_MSEC;
548 }
549
550 static uint64_t new_hpte_load0(void *htab, uint64_t pteg, int slot)
551 {
552 uint8_t *addr = htab;
553
554 addr += pteg * HASH_PTEG_SIZE_64;
555 addr += slot * HASH_PTE_SIZE_64;
556 return ldq_p(addr);
557 }
558
559 static void new_hpte_store(void *htab, uint64_t pteg, int slot,
560 uint64_t pte0, uint64_t pte1)
561 {
562 uint8_t *addr = htab;
563
564 addr += pteg * HASH_PTEG_SIZE_64;
565 addr += slot * HASH_PTE_SIZE_64;
566
567 stq_p(addr, pte0);
568 stq_p(addr + HASH_PTE_SIZE_64 / 2, pte1);
569 }
570
571 static int rehash_hpte(PowerPCCPU *cpu,
572 const ppc_hash_pte64_t *hptes,
573 void *old_hpt, uint64_t oldsize,
574 void *new_hpt, uint64_t newsize,
575 uint64_t pteg, int slot)
576 {
577 uint64_t old_hash_mask = (oldsize >> 7) - 1;
578 uint64_t new_hash_mask = (newsize >> 7) - 1;
579 target_ulong pte0 = ppc_hash64_hpte0(cpu, hptes, slot);
580 target_ulong pte1;
581 uint64_t avpn;
582 unsigned base_pg_shift;
583 uint64_t hash, new_pteg, replace_pte0;
584
585 if (!(pte0 & HPTE64_V_VALID) || !(pte0 & HPTE64_V_BOLTED)) {
586 return H_SUCCESS;
587 }
588
589 pte1 = ppc_hash64_hpte1(cpu, hptes, slot);
590
591 base_pg_shift = ppc_hash64_hpte_page_shift_noslb(cpu, pte0, pte1);
592 assert(base_pg_shift); /* H_ENTER shouldn't allow a bad encoding */
593 avpn = HPTE64_V_AVPN_VAL(pte0) & ~(((1ULL << base_pg_shift) - 1) >> 23);
594
595 if (pte0 & HPTE64_V_SECONDARY) {
596 pteg = ~pteg;
597 }
598
599 if ((pte0 & HPTE64_V_SSIZE) == HPTE64_V_SSIZE_256M) {
600 uint64_t offset, vsid;
601
602 /* We only have 28 - 23 bits of offset in avpn */
603 offset = (avpn & 0x1f) << 23;
604 vsid = avpn >> 5;
605 /* We can find more bits from the pteg value */
606 if (base_pg_shift < 23) {
607 offset |= ((vsid ^ pteg) & old_hash_mask) << base_pg_shift;
608 }
609
610 hash = vsid ^ (offset >> base_pg_shift);
611 } else if ((pte0 & HPTE64_V_SSIZE) == HPTE64_V_SSIZE_1T) {
612 uint64_t offset, vsid;
613
614 /* We only have 40 - 23 bits of seg_off in avpn */
615 offset = (avpn & 0x1ffff) << 23;
616 vsid = avpn >> 17;
617 if (base_pg_shift < 23) {
618 offset |= ((vsid ^ (vsid << 25) ^ pteg) & old_hash_mask)
619 << base_pg_shift;
620 }
621
622 hash = vsid ^ (vsid << 25) ^ (offset >> base_pg_shift);
623 } else {
624 error_report("rehash_pte: Bad segment size in HPTE");
625 return H_HARDWARE;
626 }
627
628 new_pteg = hash & new_hash_mask;
629 if (pte0 & HPTE64_V_SECONDARY) {
630 assert(~pteg == (hash & old_hash_mask));
631 new_pteg = ~new_pteg;
632 } else {
633 assert(pteg == (hash & old_hash_mask));
634 }
635 assert((oldsize != newsize) || (pteg == new_pteg));
636 replace_pte0 = new_hpte_load0(new_hpt, new_pteg, slot);
637 /*
638 * Strictly speaking, we don't need all these tests, since we only
639 * ever rehash bolted HPTEs. We might in future handle non-bolted
640 * HPTEs, though so make the logic correct for those cases as
641 * well.
642 */
643 if (replace_pte0 & HPTE64_V_VALID) {
644 assert(newsize < oldsize);
645 if (replace_pte0 & HPTE64_V_BOLTED) {
646 if (pte0 & HPTE64_V_BOLTED) {
647 /* Bolted collision, nothing we can do */
648 return H_PTEG_FULL;
649 } else {
650 /* Discard this hpte */
651 return H_SUCCESS;
652 }
653 }
654 }
655
656 new_hpte_store(new_hpt, new_pteg, slot, pte0, pte1);
657 return H_SUCCESS;
658 }
659
660 static int rehash_hpt(PowerPCCPU *cpu,
661 void *old_hpt, uint64_t oldsize,
662 void *new_hpt, uint64_t newsize)
663 {
664 uint64_t n_ptegs = oldsize >> 7;
665 uint64_t pteg;
666 int slot;
667 int rc;
668
669 for (pteg = 0; pteg < n_ptegs; pteg++) {
670 hwaddr ptex = pteg * HPTES_PER_GROUP;
671 const ppc_hash_pte64_t *hptes
672 = ppc_hash64_map_hptes(cpu, ptex, HPTES_PER_GROUP);
673
674 if (!hptes) {
675 return H_HARDWARE;
676 }
677
678 for (slot = 0; slot < HPTES_PER_GROUP; slot++) {
679 rc = rehash_hpte(cpu, hptes, old_hpt, oldsize, new_hpt, newsize,
680 pteg, slot);
681 if (rc != H_SUCCESS) {
682 ppc_hash64_unmap_hptes(cpu, hptes, ptex, HPTES_PER_GROUP);
683 return rc;
684 }
685 }
686 ppc_hash64_unmap_hptes(cpu, hptes, ptex, HPTES_PER_GROUP);
687 }
688
689 return H_SUCCESS;
690 }
691
692 static void do_push_sregs_to_kvm_pr(CPUState *cs, run_on_cpu_data data)
693 {
694 int ret;
695
696 cpu_synchronize_state(cs);
697
698 ret = kvmppc_put_books_sregs(POWERPC_CPU(cs));
699 if (ret < 0) {
700 error_report("failed to push sregs to KVM: %s", strerror(-ret));
701 exit(1);
702 }
703 }
704
705 static void push_sregs_to_kvm_pr(sPAPRMachineState *spapr)
706 {
707 CPUState *cs;
708
709 /*
710 * This is a hack for the benefit of KVM PR - it abuses the SDR1
711 * slot in kvm_sregs to communicate the userspace address of the
712 * HPT
713 */
714 if (!kvm_enabled() || !spapr->htab) {
715 return;
716 }
717
718 CPU_FOREACH(cs) {
719 run_on_cpu(cs, do_push_sregs_to_kvm_pr, RUN_ON_CPU_NULL);
720 }
721 }
722
723 static target_ulong h_resize_hpt_commit(PowerPCCPU *cpu,
724 sPAPRMachineState *spapr,
725 target_ulong opcode,
726 target_ulong *args)
727 {
728 target_ulong flags = args[0];
729 target_ulong shift = args[1];
730 sPAPRPendingHPT *pending = spapr->pending_hpt;
731 int rc;
732 size_t newsize;
733
734 if (spapr->resize_hpt == SPAPR_RESIZE_HPT_DISABLED) {
735 return H_AUTHORITY;
736 }
737
738 if (!spapr->htab_shift) {
739 /* Radix guest, no HPT */
740 return H_NOT_AVAILABLE;
741 }
742
743 trace_spapr_h_resize_hpt_commit(flags, shift);
744
745 rc = kvmppc_resize_hpt_commit(cpu, flags, shift);
746 if (rc != -ENOSYS) {
747 rc = resize_hpt_convert_rc(rc);
748 if (rc == H_SUCCESS) {
749 /* Need to set the new htab_shift in the machine state */
750 spapr->htab_shift = shift;
751 }
752 return rc;
753 }
754
755 if (flags != 0) {
756 return H_PARAMETER;
757 }
758
759 if (!pending || (pending->shift != shift)) {
760 /* no matching prepare */
761 return H_CLOSED;
762 }
763
764 if (!pending->complete) {
765 /* prepare has not completed */
766 return H_BUSY;
767 }
768
769 /* Shouldn't have got past PREPARE without an HPT */
770 g_assert(spapr->htab_shift);
771
772 newsize = 1ULL << pending->shift;
773 rc = rehash_hpt(cpu, spapr->htab, HTAB_SIZE(spapr),
774 pending->hpt, newsize);
775 if (rc == H_SUCCESS) {
776 qemu_vfree(spapr->htab);
777 spapr->htab = pending->hpt;
778 spapr->htab_shift = pending->shift;
779
780 push_sregs_to_kvm_pr(spapr);
781
782 pending->hpt = NULL; /* so it's not free()d */
783 }
784
785 /* Clean up */
786 spapr->pending_hpt = NULL;
787 free_pending_hpt(pending);
788
789 return rc;
790 }
791
792 static target_ulong h_set_sprg0(PowerPCCPU *cpu, sPAPRMachineState *spapr,
793 target_ulong opcode, target_ulong *args)
794 {
795 cpu_synchronize_state(CPU(cpu));
796 cpu->env.spr[SPR_SPRG0] = args[0];
797
798 return H_SUCCESS;
799 }
800
801 static target_ulong h_set_dabr(PowerPCCPU *cpu, sPAPRMachineState *spapr,
802 target_ulong opcode, target_ulong *args)
803 {
804 if (!has_spr(cpu, SPR_DABR)) {
805 return H_HARDWARE; /* DABR register not available */
806 }
807 cpu_synchronize_state(CPU(cpu));
808
809 if (has_spr(cpu, SPR_DABRX)) {
810 cpu->env.spr[SPR_DABRX] = 0x3; /* Use Problem and Privileged state */
811 } else if (!(args[0] & 0x4)) { /* Breakpoint Translation set? */
812 return H_RESERVED_DABR;
813 }
814
815 cpu->env.spr[SPR_DABR] = args[0];
816 return H_SUCCESS;
817 }
818
819 static target_ulong h_set_xdabr(PowerPCCPU *cpu, sPAPRMachineState *spapr,
820 target_ulong opcode, target_ulong *args)
821 {
822 target_ulong dabrx = args[1];
823
824 if (!has_spr(cpu, SPR_DABR) || !has_spr(cpu, SPR_DABRX)) {
825 return H_HARDWARE;
826 }
827
828 if ((dabrx & ~0xfULL) != 0 || (dabrx & H_DABRX_HYPERVISOR) != 0
829 || (dabrx & (H_DABRX_KERNEL | H_DABRX_USER)) == 0) {
830 return H_PARAMETER;
831 }
832
833 cpu_synchronize_state(CPU(cpu));
834 cpu->env.spr[SPR_DABRX] = dabrx;
835 cpu->env.spr[SPR_DABR] = args[0];
836
837 return H_SUCCESS;
838 }
839
840 static target_ulong h_page_init(PowerPCCPU *cpu, sPAPRMachineState *spapr,
841 target_ulong opcode, target_ulong *args)
842 {
843 target_ulong flags = args[0];
844 hwaddr dst = args[1];
845 hwaddr src = args[2];
846 hwaddr len = TARGET_PAGE_SIZE;
847 uint8_t *pdst, *psrc;
848 target_long ret = H_SUCCESS;
849
850 if (flags & ~(H_ICACHE_SYNCHRONIZE | H_ICACHE_INVALIDATE
851 | H_COPY_PAGE | H_ZERO_PAGE)) {
852 qemu_log_mask(LOG_UNIMP, "h_page_init: Bad flags (" TARGET_FMT_lx "\n",
853 flags);
854 return H_PARAMETER;
855 }
856
857 /* Map-in destination */
858 if (!is_ram_address(spapr, dst) || (dst & ~TARGET_PAGE_MASK) != 0) {
859 return H_PARAMETER;
860 }
861 pdst = cpu_physical_memory_map(dst, &len, 1);
862 if (!pdst || len != TARGET_PAGE_SIZE) {
863 return H_PARAMETER;
864 }
865
866 if (flags & H_COPY_PAGE) {
867 /* Map-in source, copy to destination, and unmap source again */
868 if (!is_ram_address(spapr, src) || (src & ~TARGET_PAGE_MASK) != 0) {
869 ret = H_PARAMETER;
870 goto unmap_out;
871 }
872 psrc = cpu_physical_memory_map(src, &len, 0);
873 if (!psrc || len != TARGET_PAGE_SIZE) {
874 ret = H_PARAMETER;
875 goto unmap_out;
876 }
877 memcpy(pdst, psrc, len);
878 cpu_physical_memory_unmap(psrc, len, 0, len);
879 } else if (flags & H_ZERO_PAGE) {
880 memset(pdst, 0, len); /* Just clear the destination page */
881 }
882
883 if (kvm_enabled() && (flags & H_ICACHE_SYNCHRONIZE) != 0) {
884 kvmppc_dcbst_range(cpu, pdst, len);
885 }
886 if (flags & (H_ICACHE_SYNCHRONIZE | H_ICACHE_INVALIDATE)) {
887 if (kvm_enabled()) {
888 kvmppc_icbi_range(cpu, pdst, len);
889 } else {
890 tb_flush(CPU(cpu));
891 }
892 }
893
894 unmap_out:
895 cpu_physical_memory_unmap(pdst, TARGET_PAGE_SIZE, 1, len);
896 return ret;
897 }
898
899 #define FLAGS_REGISTER_VPA 0x0000200000000000ULL
900 #define FLAGS_REGISTER_DTL 0x0000400000000000ULL
901 #define FLAGS_REGISTER_SLBSHADOW 0x0000600000000000ULL
902 #define FLAGS_DEREGISTER_VPA 0x0000a00000000000ULL
903 #define FLAGS_DEREGISTER_DTL 0x0000c00000000000ULL
904 #define FLAGS_DEREGISTER_SLBSHADOW 0x0000e00000000000ULL
905
906 #define VPA_MIN_SIZE 640
907 #define VPA_SIZE_OFFSET 0x4
908 #define VPA_SHARED_PROC_OFFSET 0x9
909 #define VPA_SHARED_PROC_VAL 0x2
910
911 static target_ulong register_vpa(CPUPPCState *env, target_ulong vpa)
912 {
913 CPUState *cs = CPU(ppc_env_get_cpu(env));
914 uint16_t size;
915 uint8_t tmp;
916
917 if (vpa == 0) {
918 hcall_dprintf("Can't cope with registering a VPA at logical 0\n");
919 return H_HARDWARE;
920 }
921
922 if (vpa % env->dcache_line_size) {
923 return H_PARAMETER;
924 }
925 /* FIXME: bounds check the address */
926
927 size = lduw_be_phys(cs->as, vpa + 0x4);
928
929 if (size < VPA_MIN_SIZE) {
930 return H_PARAMETER;
931 }
932
933 /* VPA is not allowed to cross a page boundary */
934 if ((vpa / 4096) != ((vpa + size - 1) / 4096)) {
935 return H_PARAMETER;
936 }
937
938 env->vpa_addr = vpa;
939
940 tmp = ldub_phys(cs->as, env->vpa_addr + VPA_SHARED_PROC_OFFSET);
941 tmp |= VPA_SHARED_PROC_VAL;
942 stb_phys(cs->as, env->vpa_addr + VPA_SHARED_PROC_OFFSET, tmp);
943
944 return H_SUCCESS;
945 }
946
947 static target_ulong deregister_vpa(CPUPPCState *env, target_ulong vpa)
948 {
949 if (env->slb_shadow_addr) {
950 return H_RESOURCE;
951 }
952
953 if (env->dtl_addr) {
954 return H_RESOURCE;
955 }
956
957 env->vpa_addr = 0;
958 return H_SUCCESS;
959 }
960
961 static target_ulong register_slb_shadow(CPUPPCState *env, target_ulong addr)
962 {
963 CPUState *cs = CPU(ppc_env_get_cpu(env));
964 uint32_t size;
965
966 if (addr == 0) {
967 hcall_dprintf("Can't cope with SLB shadow at logical 0\n");
968 return H_HARDWARE;
969 }
970
971 size = ldl_be_phys(cs->as, addr + 0x4);
972 if (size < 0x8) {
973 return H_PARAMETER;
974 }
975
976 if ((addr / 4096) != ((addr + size - 1) / 4096)) {
977 return H_PARAMETER;
978 }
979
980 if (!env->vpa_addr) {
981 return H_RESOURCE;
982 }
983
984 env->slb_shadow_addr = addr;
985 env->slb_shadow_size = size;
986
987 return H_SUCCESS;
988 }
989
990 static target_ulong deregister_slb_shadow(CPUPPCState *env, target_ulong addr)
991 {
992 env->slb_shadow_addr = 0;
993 env->slb_shadow_size = 0;
994 return H_SUCCESS;
995 }
996
997 static target_ulong register_dtl(CPUPPCState *env, target_ulong addr)
998 {
999 CPUState *cs = CPU(ppc_env_get_cpu(env));
1000 uint32_t size;
1001
1002 if (addr == 0) {
1003 hcall_dprintf("Can't cope with DTL at logical 0\n");
1004 return H_HARDWARE;
1005 }
1006
1007 size = ldl_be_phys(cs->as, addr + 0x4);
1008
1009 if (size < 48) {
1010 return H_PARAMETER;
1011 }
1012
1013 if (!env->vpa_addr) {
1014 return H_RESOURCE;
1015 }
1016
1017 env->dtl_addr = addr;
1018 env->dtl_size = size;
1019
1020 return H_SUCCESS;
1021 }
1022
1023 static target_ulong deregister_dtl(CPUPPCState *env, target_ulong addr)
1024 {
1025 env->dtl_addr = 0;
1026 env->dtl_size = 0;
1027
1028 return H_SUCCESS;
1029 }
1030
1031 static target_ulong h_register_vpa(PowerPCCPU *cpu, sPAPRMachineState *spapr,
1032 target_ulong opcode, target_ulong *args)
1033 {
1034 target_ulong flags = args[0];
1035 target_ulong procno = args[1];
1036 target_ulong vpa = args[2];
1037 target_ulong ret = H_PARAMETER;
1038 CPUPPCState *tenv;
1039 PowerPCCPU *tcpu;
1040
1041 tcpu = spapr_find_cpu(procno);
1042 if (!tcpu) {
1043 return H_PARAMETER;
1044 }
1045 tenv = &tcpu->env;
1046
1047 switch (flags) {
1048 case FLAGS_REGISTER_VPA:
1049 ret = register_vpa(tenv, vpa);
1050 break;
1051
1052 case FLAGS_DEREGISTER_VPA:
1053 ret = deregister_vpa(tenv, vpa);
1054 break;
1055
1056 case FLAGS_REGISTER_SLBSHADOW:
1057 ret = register_slb_shadow(tenv, vpa);
1058 break;
1059
1060 case FLAGS_DEREGISTER_SLBSHADOW:
1061 ret = deregister_slb_shadow(tenv, vpa);
1062 break;
1063
1064 case FLAGS_REGISTER_DTL:
1065 ret = register_dtl(tenv, vpa);
1066 break;
1067
1068 case FLAGS_DEREGISTER_DTL:
1069 ret = deregister_dtl(tenv, vpa);
1070 break;
1071 }
1072
1073 return ret;
1074 }
1075
1076 static target_ulong h_cede(PowerPCCPU *cpu, sPAPRMachineState *spapr,
1077 target_ulong opcode, target_ulong *args)
1078 {
1079 CPUPPCState *env = &cpu->env;
1080 CPUState *cs = CPU(cpu);
1081
1082 env->msr |= (1ULL << MSR_EE);
1083 hreg_compute_hflags(env);
1084 if (!cpu_has_work(cs)) {
1085 cs->halted = 1;
1086 cs->exception_index = EXCP_HLT;
1087 cs->exit_request = 1;
1088 }
1089 return H_SUCCESS;
1090 }
1091
1092 static target_ulong h_rtas(PowerPCCPU *cpu, sPAPRMachineState *spapr,
1093 target_ulong opcode, target_ulong *args)
1094 {
1095 target_ulong rtas_r3 = args[0];
1096 uint32_t token = rtas_ld(rtas_r3, 0);
1097 uint32_t nargs = rtas_ld(rtas_r3, 1);
1098 uint32_t nret = rtas_ld(rtas_r3, 2);
1099
1100 return spapr_rtas_call(cpu, spapr, token, nargs, rtas_r3 + 12,
1101 nret, rtas_r3 + 12 + 4*nargs);
1102 }
1103
1104 static target_ulong h_logical_load(PowerPCCPU *cpu, sPAPRMachineState *spapr,
1105 target_ulong opcode, target_ulong *args)
1106 {
1107 CPUState *cs = CPU(cpu);
1108 target_ulong size = args[0];
1109 target_ulong addr = args[1];
1110
1111 switch (size) {
1112 case 1:
1113 args[0] = ldub_phys(cs->as, addr);
1114 return H_SUCCESS;
1115 case 2:
1116 args[0] = lduw_phys(cs->as, addr);
1117 return H_SUCCESS;
1118 case 4:
1119 args[0] = ldl_phys(cs->as, addr);
1120 return H_SUCCESS;
1121 case 8:
1122 args[0] = ldq_phys(cs->as, addr);
1123 return H_SUCCESS;
1124 }
1125 return H_PARAMETER;
1126 }
1127
1128 static target_ulong h_logical_store(PowerPCCPU *cpu, sPAPRMachineState *spapr,
1129 target_ulong opcode, target_ulong *args)
1130 {
1131 CPUState *cs = CPU(cpu);
1132
1133 target_ulong size = args[0];
1134 target_ulong addr = args[1];
1135 target_ulong val = args[2];
1136
1137 switch (size) {
1138 case 1:
1139 stb_phys(cs->as, addr, val);
1140 return H_SUCCESS;
1141 case 2:
1142 stw_phys(cs->as, addr, val);
1143 return H_SUCCESS;
1144 case 4:
1145 stl_phys(cs->as, addr, val);
1146 return H_SUCCESS;
1147 case 8:
1148 stq_phys(cs->as, addr, val);
1149 return H_SUCCESS;
1150 }
1151 return H_PARAMETER;
1152 }
1153
1154 static target_ulong h_logical_memop(PowerPCCPU *cpu, sPAPRMachineState *spapr,
1155 target_ulong opcode, target_ulong *args)
1156 {
1157 CPUState *cs = CPU(cpu);
1158
1159 target_ulong dst = args[0]; /* Destination address */
1160 target_ulong src = args[1]; /* Source address */
1161 target_ulong esize = args[2]; /* Element size (0=1,1=2,2=4,3=8) */
1162 target_ulong count = args[3]; /* Element count */
1163 target_ulong op = args[4]; /* 0 = copy, 1 = invert */
1164 uint64_t tmp;
1165 unsigned int mask = (1 << esize) - 1;
1166 int step = 1 << esize;
1167
1168 if (count > 0x80000000) {
1169 return H_PARAMETER;
1170 }
1171
1172 if ((dst & mask) || (src & mask) || (op > 1)) {
1173 return H_PARAMETER;
1174 }
1175
1176 if (dst >= src && dst < (src + (count << esize))) {
1177 dst = dst + ((count - 1) << esize);
1178 src = src + ((count - 1) << esize);
1179 step = -step;
1180 }
1181
1182 while (count--) {
1183 switch (esize) {
1184 case 0:
1185 tmp = ldub_phys(cs->as, src);
1186 break;
1187 case 1:
1188 tmp = lduw_phys(cs->as, src);
1189 break;
1190 case 2:
1191 tmp = ldl_phys(cs->as, src);
1192 break;
1193 case 3:
1194 tmp = ldq_phys(cs->as, src);
1195 break;
1196 default:
1197 return H_PARAMETER;
1198 }
1199 if (op == 1) {
1200 tmp = ~tmp;
1201 }
1202 switch (esize) {
1203 case 0:
1204 stb_phys(cs->as, dst, tmp);
1205 break;
1206 case 1:
1207 stw_phys(cs->as, dst, tmp);
1208 break;
1209 case 2:
1210 stl_phys(cs->as, dst, tmp);
1211 break;
1212 case 3:
1213 stq_phys(cs->as, dst, tmp);
1214 break;
1215 }
1216 dst = dst + step;
1217 src = src + step;
1218 }
1219
1220 return H_SUCCESS;
1221 }
1222
1223 static target_ulong h_logical_icbi(PowerPCCPU *cpu, sPAPRMachineState *spapr,
1224 target_ulong opcode, target_ulong *args)
1225 {
1226 /* Nothing to do on emulation, KVM will trap this in the kernel */
1227 return H_SUCCESS;
1228 }
1229
1230 static target_ulong h_logical_dcbf(PowerPCCPU *cpu, sPAPRMachineState *spapr,
1231 target_ulong opcode, target_ulong *args)
1232 {
1233 /* Nothing to do on emulation, KVM will trap this in the kernel */
1234 return H_SUCCESS;
1235 }
1236
1237 static target_ulong h_set_mode_resource_le(PowerPCCPU *cpu,
1238 target_ulong mflags,
1239 target_ulong value1,
1240 target_ulong value2)
1241 {
1242 if (value1) {
1243 return H_P3;
1244 }
1245 if (value2) {
1246 return H_P4;
1247 }
1248
1249 switch (mflags) {
1250 case H_SET_MODE_ENDIAN_BIG:
1251 set_all_lpcrs(0, LPCR_ILE);
1252 spapr_pci_switch_vga(true);
1253 return H_SUCCESS;
1254
1255 case H_SET_MODE_ENDIAN_LITTLE:
1256 set_all_lpcrs(LPCR_ILE, LPCR_ILE);
1257 spapr_pci_switch_vga(false);
1258 return H_SUCCESS;
1259 }
1260
1261 return H_UNSUPPORTED_FLAG;
1262 }
1263
1264 static target_ulong h_set_mode_resource_addr_trans_mode(PowerPCCPU *cpu,
1265 target_ulong mflags,
1266 target_ulong value1,
1267 target_ulong value2)
1268 {
1269 PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
1270
1271 if (!(pcc->insns_flags2 & PPC2_ISA207S)) {
1272 return H_P2;
1273 }
1274 if (value1) {
1275 return H_P3;
1276 }
1277 if (value2) {
1278 return H_P4;
1279 }
1280
1281 if (mflags == AIL_RESERVED) {
1282 return H_UNSUPPORTED_FLAG;
1283 }
1284
1285 set_all_lpcrs(mflags << LPCR_AIL_SHIFT, LPCR_AIL);
1286
1287 return H_SUCCESS;
1288 }
1289
1290 static target_ulong h_set_mode(PowerPCCPU *cpu, sPAPRMachineState *spapr,
1291 target_ulong opcode, target_ulong *args)
1292 {
1293 target_ulong resource = args[1];
1294 target_ulong ret = H_P2;
1295
1296 switch (resource) {
1297 case H_SET_MODE_RESOURCE_LE:
1298 ret = h_set_mode_resource_le(cpu, args[0], args[2], args[3]);
1299 break;
1300 case H_SET_MODE_RESOURCE_ADDR_TRANS_MODE:
1301 ret = h_set_mode_resource_addr_trans_mode(cpu, args[0],
1302 args[2], args[3]);
1303 break;
1304 }
1305
1306 return ret;
1307 }
1308
1309 static target_ulong h_clean_slb(PowerPCCPU *cpu, sPAPRMachineState *spapr,
1310 target_ulong opcode, target_ulong *args)
1311 {
1312 qemu_log_mask(LOG_UNIMP, "Unimplemented SPAPR hcall 0x"TARGET_FMT_lx"%s\n",
1313 opcode, " (H_CLEAN_SLB)");
1314 return H_FUNCTION;
1315 }
1316
1317 static target_ulong h_invalidate_pid(PowerPCCPU *cpu, sPAPRMachineState *spapr,
1318 target_ulong opcode, target_ulong *args)
1319 {
1320 qemu_log_mask(LOG_UNIMP, "Unimplemented SPAPR hcall 0x"TARGET_FMT_lx"%s\n",
1321 opcode, " (H_INVALIDATE_PID)");
1322 return H_FUNCTION;
1323 }
1324
1325 static void spapr_check_setup_free_hpt(sPAPRMachineState *spapr,
1326 uint64_t patbe_old, uint64_t patbe_new)
1327 {
1328 /*
1329 * We have 4 Options:
1330 * HASH->HASH || RADIX->RADIX || NOTHING->RADIX : Do Nothing
1331 * HASH->RADIX : Free HPT
1332 * RADIX->HASH : Allocate HPT
1333 * NOTHING->HASH : Allocate HPT
1334 * Note: NOTHING implies the case where we said the guest could choose
1335 * later and so assumed radix and now it's called H_REG_PROC_TBL
1336 */
1337
1338 if ((patbe_old & PATBE1_GR) == (patbe_new & PATBE1_GR)) {
1339 /* We assume RADIX, so this catches all the "Do Nothing" cases */
1340 } else if (!(patbe_old & PATBE1_GR)) {
1341 /* HASH->RADIX : Free HPT */
1342 spapr_free_hpt(spapr);
1343 } else if (!(patbe_new & PATBE1_GR)) {
1344 /* RADIX->HASH || NOTHING->HASH : Allocate HPT */
1345 spapr_setup_hpt_and_vrma(spapr);
1346 }
1347 return;
1348 }
1349
1350 #define FLAGS_MASK 0x01FULL
1351 #define FLAG_MODIFY 0x10
1352 #define FLAG_REGISTER 0x08
1353 #define FLAG_RADIX 0x04
1354 #define FLAG_HASH_PROC_TBL 0x02
1355 #define FLAG_GTSE 0x01
1356
1357 static target_ulong h_register_process_table(PowerPCCPU *cpu,
1358 sPAPRMachineState *spapr,
1359 target_ulong opcode,
1360 target_ulong *args)
1361 {
1362 target_ulong flags = args[0];
1363 target_ulong proc_tbl = args[1];
1364 target_ulong page_size = args[2];
1365 target_ulong table_size = args[3];
1366 uint64_t cproc;
1367
1368 if (flags & ~FLAGS_MASK) { /* Check no reserved bits are set */
1369 return H_PARAMETER;
1370 }
1371 if (flags & FLAG_MODIFY) {
1372 if (flags & FLAG_REGISTER) {
1373 if (flags & FLAG_RADIX) { /* Register new RADIX process table */
1374 if (proc_tbl & 0xfff || proc_tbl >> 60) {
1375 return H_P2;
1376 } else if (page_size) {
1377 return H_P3;
1378 } else if (table_size > 24) {
1379 return H_P4;
1380 }
1381 cproc = PATBE1_GR | proc_tbl | table_size;
1382 } else { /* Register new HPT process table */
1383 if (flags & FLAG_HASH_PROC_TBL) { /* Hash with Segment Tables */
1384 /* TODO - Not Supported */
1385 /* Technically caused by flag bits => H_PARAMETER */
1386 return H_PARAMETER;
1387 } else { /* Hash with SLB */
1388 if (proc_tbl >> 38) {
1389 return H_P2;
1390 } else if (page_size & ~0x7) {
1391 return H_P3;
1392 } else if (table_size > 24) {
1393 return H_P4;
1394 }
1395 }
1396 cproc = (proc_tbl << 25) | page_size << 5 | table_size;
1397 }
1398
1399 } else { /* Deregister current process table */
1400 /* Set to benign value: (current GR) | 0. This allows
1401 * deregistration in KVM to succeed even if the radix bit in flags
1402 * doesn't match the radix bit in the old PATB. */
1403 cproc = spapr->patb_entry & PATBE1_GR;
1404 }
1405 } else { /* Maintain current registration */
1406 if (!(flags & FLAG_RADIX) != !(spapr->patb_entry & PATBE1_GR)) {
1407 /* Technically caused by flag bits => H_PARAMETER */
1408 return H_PARAMETER; /* Existing Process Table Mismatch */
1409 }
1410 cproc = spapr->patb_entry;
1411 }
1412
1413 /* Check if we need to setup OR free the hpt */
1414 spapr_check_setup_free_hpt(spapr, spapr->patb_entry, cproc);
1415
1416 spapr->patb_entry = cproc; /* Save new process table */
1417
1418 /* Update the UPRT and GTSE bits in the LPCR for all cpus */
1419 set_all_lpcrs(((flags & (FLAG_RADIX | FLAG_HASH_PROC_TBL)) ? LPCR_UPRT : 0) |
1420 ((flags & FLAG_GTSE) ? LPCR_GTSE : 0),
1421 LPCR_UPRT | LPCR_GTSE);
1422
1423 if (kvm_enabled()) {
1424 return kvmppc_configure_v3_mmu(cpu, flags & FLAG_RADIX,
1425 flags & FLAG_GTSE, cproc);
1426 }
1427 return H_SUCCESS;
1428 }
1429
1430 #define H_SIGNAL_SYS_RESET_ALL -1
1431 #define H_SIGNAL_SYS_RESET_ALLBUTSELF -2
1432
1433 static target_ulong h_signal_sys_reset(PowerPCCPU *cpu,
1434 sPAPRMachineState *spapr,
1435 target_ulong opcode, target_ulong *args)
1436 {
1437 target_long target = args[0];
1438 CPUState *cs;
1439
1440 if (target < 0) {
1441 /* Broadcast */
1442 if (target < H_SIGNAL_SYS_RESET_ALLBUTSELF) {
1443 return H_PARAMETER;
1444 }
1445
1446 CPU_FOREACH(cs) {
1447 PowerPCCPU *c = POWERPC_CPU(cs);
1448
1449 if (target == H_SIGNAL_SYS_RESET_ALLBUTSELF) {
1450 if (c == cpu) {
1451 continue;
1452 }
1453 }
1454 run_on_cpu(cs, spapr_do_system_reset_on_cpu, RUN_ON_CPU_NULL);
1455 }
1456 return H_SUCCESS;
1457
1458 } else {
1459 /* Unicast */
1460 cs = CPU(spapr_find_cpu(target));
1461 if (cs) {
1462 run_on_cpu(cs, spapr_do_system_reset_on_cpu, RUN_ON_CPU_NULL);
1463 return H_SUCCESS;
1464 }
1465 return H_PARAMETER;
1466 }
1467 }
1468
1469 static uint32_t cas_check_pvr(sPAPRMachineState *spapr, PowerPCCPU *cpu,
1470 target_ulong *addr, bool *raw_mode_supported,
1471 Error **errp)
1472 {
1473 bool explicit_match = false; /* Matched the CPU's real PVR */
1474 uint32_t max_compat = spapr->max_compat_pvr;
1475 uint32_t best_compat = 0;
1476 int i;
1477
1478 /*
1479 * We scan the supplied table of PVRs looking for two things
1480 * 1. Is our real CPU PVR in the list?
1481 * 2. What's the "best" listed logical PVR
1482 */
1483 for (i = 0; i < 512; ++i) {
1484 uint32_t pvr, pvr_mask;
1485
1486 pvr_mask = ldl_be_phys(&address_space_memory, *addr);
1487 pvr = ldl_be_phys(&address_space_memory, *addr + 4);
1488 *addr += 8;
1489
1490 if (~pvr_mask & pvr) {
1491 break; /* Terminator record */
1492 }
1493
1494 if ((cpu->env.spr[SPR_PVR] & pvr_mask) == (pvr & pvr_mask)) {
1495 explicit_match = true;
1496 } else {
1497 if (ppc_check_compat(cpu, pvr, best_compat, max_compat)) {
1498 best_compat = pvr;
1499 }
1500 }
1501 }
1502
1503 if ((best_compat == 0) && (!explicit_match || max_compat)) {
1504 /* We couldn't find a suitable compatibility mode, and either
1505 * the guest doesn't support "raw" mode for this CPU, or raw
1506 * mode is disabled because a maximum compat mode is set */
1507 error_setg(errp, "Couldn't negotiate a suitable PVR during CAS");
1508 return 0;
1509 }
1510
1511 *raw_mode_supported = explicit_match;
1512
1513 /* Parsing finished */
1514 trace_spapr_cas_pvr(cpu->compat_pvr, explicit_match, best_compat);
1515
1516 return best_compat;
1517 }
1518
1519 static target_ulong h_client_architecture_support(PowerPCCPU *cpu,
1520 sPAPRMachineState *spapr,
1521 target_ulong opcode,
1522 target_ulong *args)
1523 {
1524 /* Working address in data buffer */
1525 target_ulong addr = ppc64_phys_to_real(args[0]);
1526 target_ulong ov_table;
1527 uint32_t cas_pvr;
1528 sPAPROptionVector *ov1_guest, *ov5_guest, *ov5_cas_old, *ov5_updates;
1529 bool guest_radix;
1530 Error *local_err = NULL;
1531 bool raw_mode_supported = false;
1532
1533 cas_pvr = cas_check_pvr(spapr, cpu, &addr, &raw_mode_supported, &local_err);
1534 if (local_err) {
1535 error_report_err(local_err);
1536 return H_HARDWARE;
1537 }
1538
1539 /* Update CPUs */
1540 if (cpu->compat_pvr != cas_pvr) {
1541 ppc_set_compat_all(cas_pvr, &local_err);
1542 if (local_err) {
1543 /* We fail to set compat mode (likely because running with KVM PR),
1544 * but maybe we can fallback to raw mode if the guest supports it.
1545 */
1546 if (!raw_mode_supported) {
1547 error_report_err(local_err);
1548 return H_HARDWARE;
1549 }
1550 local_err = NULL;
1551 }
1552 }
1553
1554 /* For the future use: here @ov_table points to the first option vector */
1555 ov_table = addr;
1556
1557 ov1_guest = spapr_ovec_parse_vector(ov_table, 1);
1558 ov5_guest = spapr_ovec_parse_vector(ov_table, 5);
1559 if (spapr_ovec_test(ov5_guest, OV5_MMU_BOTH)) {
1560 error_report("guest requested hash and radix MMU, which is invalid.");
1561 exit(EXIT_FAILURE);
1562 }
1563 /* The radix/hash bit in byte 24 requires special handling: */
1564 guest_radix = spapr_ovec_test(ov5_guest, OV5_MMU_RADIX_300);
1565 spapr_ovec_clear(ov5_guest, OV5_MMU_RADIX_300);
1566
1567 /*
1568 * HPT resizing is a bit of a special case, because when enabled
1569 * we assume an HPT guest will support it until it says it
1570 * doesn't, instead of assuming it won't support it until it says
1571 * it does. Strictly speaking that approach could break for
1572 * guests which don't make a CAS call, but those are so old we
1573 * don't care about them. Without that assumption we'd have to
1574 * make at least a temporary allocation of an HPT sized for max
1575 * memory, which could be impossibly difficult under KVM HV if
1576 * maxram is large.
1577 */
1578 if (!guest_radix && !spapr_ovec_test(ov5_guest, OV5_HPT_RESIZE)) {
1579 int maxshift = spapr_hpt_shift_for_ramsize(MACHINE(spapr)->maxram_size);
1580
1581 if (spapr->resize_hpt == SPAPR_RESIZE_HPT_REQUIRED) {
1582 error_report(
1583 "h_client_architecture_support: Guest doesn't support HPT resizing, but resize-hpt=required");
1584 exit(1);
1585 }
1586
1587 if (spapr->htab_shift < maxshift) {
1588 /* Guest doesn't know about HPT resizing, so we
1589 * pre-emptively resize for the maximum permitted RAM. At
1590 * the point this is called, nothing should have been
1591 * entered into the existing HPT */
1592 spapr_reallocate_hpt(spapr, maxshift, &error_fatal);
1593 push_sregs_to_kvm_pr(spapr);
1594 }
1595 }
1596
1597 /* NOTE: there are actually a number of ov5 bits where input from the
1598 * guest is always zero, and the platform/QEMU enables them independently
1599 * of guest input. To model these properly we'd want some sort of mask,
1600 * but since they only currently apply to memory migration as defined
1601 * by LoPAPR 1.1, 14.5.4.8, which QEMU doesn't implement, we don't need
1602 * to worry about this for now.
1603 */
1604 ov5_cas_old = spapr_ovec_clone(spapr->ov5_cas);
1605
1606 /* also clear the radix/hash bit from the current ov5_cas bits to
1607 * be in sync with the newly ov5 bits. Else the radix bit will be
1608 * seen as being removed and this will generate a reset loop
1609 */
1610 spapr_ovec_clear(ov5_cas_old, OV5_MMU_RADIX_300);
1611
1612 /* full range of negotiated ov5 capabilities */
1613 spapr_ovec_intersect(spapr->ov5_cas, spapr->ov5, ov5_guest);
1614 spapr_ovec_cleanup(ov5_guest);
1615 /* capabilities that have been added since CAS-generated guest reset.
1616 * if capabilities have since been removed, generate another reset
1617 */
1618 ov5_updates = spapr_ovec_new();
1619 spapr->cas_reboot = spapr_ovec_diff(ov5_updates,
1620 ov5_cas_old, spapr->ov5_cas);
1621 /* Now that processing is finished, set the radix/hash bit for the
1622 * guest if it requested a valid mode; otherwise terminate the boot. */
1623 if (guest_radix) {
1624 if (kvm_enabled() && !kvmppc_has_cap_mmu_radix()) {
1625 error_report("Guest requested unavailable MMU mode (radix).");
1626 exit(EXIT_FAILURE);
1627 }
1628 spapr_ovec_set(spapr->ov5_cas, OV5_MMU_RADIX_300);
1629 } else {
1630 if (kvm_enabled() && kvmppc_has_cap_mmu_radix()
1631 && !kvmppc_has_cap_mmu_hash_v3()) {
1632 error_report("Guest requested unavailable MMU mode (hash).");
1633 exit(EXIT_FAILURE);
1634 }
1635 }
1636 spapr->cas_legacy_guest_workaround = !spapr_ovec_test(ov1_guest,
1637 OV1_PPC_3_00);
1638 if (!spapr->cas_reboot) {
1639 /* If spapr_machine_reset() did not set up a HPT but one is necessary
1640 * (because the guest isn't going to use radix) then set it up here. */
1641 if ((spapr->patb_entry & PATBE1_GR) && !guest_radix) {
1642 /* legacy hash or new hash: */
1643 spapr_setup_hpt_and_vrma(spapr);
1644 }
1645 spapr->cas_reboot =
1646 (spapr_h_cas_compose_response(spapr, args[1], args[2],
1647 ov5_updates) != 0);
1648 }
1649 spapr_ovec_cleanup(ov5_updates);
1650
1651 if (spapr->cas_reboot) {
1652 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
1653 }
1654
1655 return H_SUCCESS;
1656 }
1657
1658 static target_ulong h_get_cpu_characteristics(PowerPCCPU *cpu,
1659 sPAPRMachineState *spapr,
1660 target_ulong opcode,
1661 target_ulong *args)
1662 {
1663 uint64_t characteristics = H_CPU_CHAR_HON_BRANCH_HINTS &
1664 ~H_CPU_CHAR_THR_RECONF_TRIG;
1665 uint64_t behaviour = H_CPU_BEHAV_FAVOUR_SECURITY;
1666 uint8_t safe_cache = spapr_get_cap(spapr, SPAPR_CAP_CFPC);
1667 uint8_t safe_bounds_check = spapr_get_cap(spapr, SPAPR_CAP_SBBC);
1668 uint8_t safe_indirect_branch = spapr_get_cap(spapr, SPAPR_CAP_IBS);
1669
1670 switch (safe_cache) {
1671 case SPAPR_CAP_WORKAROUND:
1672 characteristics |= H_CPU_CHAR_L1D_FLUSH_ORI30;
1673 characteristics |= H_CPU_CHAR_L1D_FLUSH_TRIG2;
1674 characteristics |= H_CPU_CHAR_L1D_THREAD_PRIV;
1675 behaviour |= H_CPU_BEHAV_L1D_FLUSH_PR;
1676 break;
1677 case SPAPR_CAP_FIXED:
1678 break;
1679 default: /* broken */
1680 assert(safe_cache == SPAPR_CAP_BROKEN);
1681 behaviour |= H_CPU_BEHAV_L1D_FLUSH_PR;
1682 break;
1683 }
1684
1685 switch (safe_bounds_check) {
1686 case SPAPR_CAP_WORKAROUND:
1687 characteristics |= H_CPU_CHAR_SPEC_BAR_ORI31;
1688 behaviour |= H_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
1689 break;
1690 case SPAPR_CAP_FIXED:
1691 break;
1692 default: /* broken */
1693 assert(safe_bounds_check == SPAPR_CAP_BROKEN);
1694 behaviour |= H_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
1695 break;
1696 }
1697
1698 switch (safe_indirect_branch) {
1699 case SPAPR_CAP_FIXED_CCD:
1700 characteristics |= H_CPU_CHAR_CACHE_COUNT_DIS;
1701 break;
1702 case SPAPR_CAP_FIXED_IBS:
1703 characteristics |= H_CPU_CHAR_BCCTRL_SERIALISED;
1704 break;
1705 default: /* broken */
1706 assert(safe_indirect_branch == SPAPR_CAP_BROKEN);
1707 break;
1708 }
1709
1710 args[0] = characteristics;
1711 args[1] = behaviour;
1712
1713 return H_SUCCESS;
1714 }
1715
1716 static spapr_hcall_fn papr_hypercall_table[(MAX_HCALL_OPCODE / 4) + 1];
1717 static spapr_hcall_fn kvmppc_hypercall_table[KVMPPC_HCALL_MAX - KVMPPC_HCALL_BASE + 1];
1718
1719 void spapr_register_hypercall(target_ulong opcode, spapr_hcall_fn fn)
1720 {
1721 spapr_hcall_fn *slot;
1722
1723 if (opcode <= MAX_HCALL_OPCODE) {
1724 assert((opcode & 0x3) == 0);
1725
1726 slot = &papr_hypercall_table[opcode / 4];
1727 } else {
1728 assert((opcode >= KVMPPC_HCALL_BASE) && (opcode <= KVMPPC_HCALL_MAX));
1729
1730 slot = &kvmppc_hypercall_table[opcode - KVMPPC_HCALL_BASE];
1731 }
1732
1733 assert(!(*slot));
1734 *slot = fn;
1735 }
1736
1737 target_ulong spapr_hypercall(PowerPCCPU *cpu, target_ulong opcode,
1738 target_ulong *args)
1739 {
1740 sPAPRMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
1741
1742 if ((opcode <= MAX_HCALL_OPCODE)
1743 && ((opcode & 0x3) == 0)) {
1744 spapr_hcall_fn fn = papr_hypercall_table[opcode / 4];
1745
1746 if (fn) {
1747 return fn(cpu, spapr, opcode, args);
1748 }
1749 } else if ((opcode >= KVMPPC_HCALL_BASE) &&
1750 (opcode <= KVMPPC_HCALL_MAX)) {
1751 spapr_hcall_fn fn = kvmppc_hypercall_table[opcode - KVMPPC_HCALL_BASE];
1752
1753 if (fn) {
1754 return fn(cpu, spapr, opcode, args);
1755 }
1756 }
1757
1758 qemu_log_mask(LOG_UNIMP, "Unimplemented SPAPR hcall 0x" TARGET_FMT_lx "\n",
1759 opcode);
1760 return H_FUNCTION;
1761 }
1762
1763 static void hypercall_register_types(void)
1764 {
1765 /* hcall-pft */
1766 spapr_register_hypercall(H_ENTER, h_enter);
1767 spapr_register_hypercall(H_REMOVE, h_remove);
1768 spapr_register_hypercall(H_PROTECT, h_protect);
1769 spapr_register_hypercall(H_READ, h_read);
1770
1771 /* hcall-bulk */
1772 spapr_register_hypercall(H_BULK_REMOVE, h_bulk_remove);
1773
1774 /* hcall-hpt-resize */
1775 spapr_register_hypercall(H_RESIZE_HPT_PREPARE, h_resize_hpt_prepare);
1776 spapr_register_hypercall(H_RESIZE_HPT_COMMIT, h_resize_hpt_commit);
1777
1778 /* hcall-splpar */
1779 spapr_register_hypercall(H_REGISTER_VPA, h_register_vpa);
1780 spapr_register_hypercall(H_CEDE, h_cede);
1781 spapr_register_hypercall(H_SIGNAL_SYS_RESET, h_signal_sys_reset);
1782
1783 /* processor register resource access h-calls */
1784 spapr_register_hypercall(H_SET_SPRG0, h_set_sprg0);
1785 spapr_register_hypercall(H_SET_DABR, h_set_dabr);
1786 spapr_register_hypercall(H_SET_XDABR, h_set_xdabr);
1787 spapr_register_hypercall(H_PAGE_INIT, h_page_init);
1788 spapr_register_hypercall(H_SET_MODE, h_set_mode);
1789
1790 /* In Memory Table MMU h-calls */
1791 spapr_register_hypercall(H_CLEAN_SLB, h_clean_slb);
1792 spapr_register_hypercall(H_INVALIDATE_PID, h_invalidate_pid);
1793 spapr_register_hypercall(H_REGISTER_PROC_TBL, h_register_process_table);
1794
1795 /* hcall-get-cpu-characteristics */
1796 spapr_register_hypercall(H_GET_CPU_CHARACTERISTICS,
1797 h_get_cpu_characteristics);
1798
1799 /* "debugger" hcalls (also used by SLOF). Note: We do -not- differenciate
1800 * here between the "CI" and the "CACHE" variants, they will use whatever
1801 * mapping attributes qemu is using. When using KVM, the kernel will
1802 * enforce the attributes more strongly
1803 */
1804 spapr_register_hypercall(H_LOGICAL_CI_LOAD, h_logical_load);
1805 spapr_register_hypercall(H_LOGICAL_CI_STORE, h_logical_store);
1806 spapr_register_hypercall(H_LOGICAL_CACHE_LOAD, h_logical_load);
1807 spapr_register_hypercall(H_LOGICAL_CACHE_STORE, h_logical_store);
1808 spapr_register_hypercall(H_LOGICAL_ICBI, h_logical_icbi);
1809 spapr_register_hypercall(H_LOGICAL_DCBF, h_logical_dcbf);
1810 spapr_register_hypercall(KVMPPC_H_LOGICAL_MEMOP, h_logical_memop);
1811
1812 /* qemu/KVM-PPC specific hcalls */
1813 spapr_register_hypercall(KVMPPC_H_RTAS, h_rtas);
1814
1815 /* ibm,client-architecture-support support */
1816 spapr_register_hypercall(KVMPPC_H_CAS, h_client_architecture_support);
1817 }
1818
1819 type_init(hypercall_register_types)
QEmu