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Merge tag 'trace-3.8-rc3-regression-fix' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / powerpc / kvm / book3s_emulate.c
blobd31a716f7f2bc1d06b0a2021a422b1f69e8257e5
1 /*
2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
5 *
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
10 *
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
14 *
15 * Copyright SUSE Linux Products GmbH 2009
16 *
17 * Authors: Alexander Graf <agraf@suse.de>
18 */
19
20 #include <asm/kvm_ppc.h>
21 #include <asm/disassemble.h>
22 #include <asm/kvm_book3s.h>
23 #include <asm/reg.h>
24 #include <asm/switch_to.h>
25 #include <asm/time.h>
26
27 #define OP_19_XOP_RFID 18
28 #define OP_19_XOP_RFI 50
29
30 #define OP_31_XOP_MFMSR 83
31 #define OP_31_XOP_MTMSR 146
32 #define OP_31_XOP_MTMSRD 178
33 #define OP_31_XOP_MTSR 210
34 #define OP_31_XOP_MTSRIN 242
35 #define OP_31_XOP_TLBIEL 274
36 #define OP_31_XOP_TLBIE 306
37 #define OP_31_XOP_SLBMTE 402
38 #define OP_31_XOP_SLBIE 434
39 #define OP_31_XOP_SLBIA 498
40 #define OP_31_XOP_MFSR 595
41 #define OP_31_XOP_MFSRIN 659
42 #define OP_31_XOP_DCBA 758
43 #define OP_31_XOP_SLBMFEV 851
44 #define OP_31_XOP_EIOIO 854
45 #define OP_31_XOP_SLBMFEE 915
46
47 /* DCBZ is actually 1014, but we patch it to 1010 so we get a trap */
48 #define OP_31_XOP_DCBZ 1010
49
50 #define OP_LFS 48
51 #define OP_LFD 50
52 #define OP_STFS 52
53 #define OP_STFD 54
54
55 #define SPRN_GQR0 912
56 #define SPRN_GQR1 913
57 #define SPRN_GQR2 914
58 #define SPRN_GQR3 915
59 #define SPRN_GQR4 916
60 #define SPRN_GQR5 917
61 #define SPRN_GQR6 918
62 #define SPRN_GQR7 919
63
64 /* Book3S_32 defines mfsrin(v) - but that messes up our abstract
65 * function pointers, so let's just disable the define. */
66 #undef mfsrin
67
68 enum priv_level {
69 PRIV_PROBLEM = 0,
70 PRIV_SUPER = 1,
71 PRIV_HYPER = 2,
72 };
73
74 static bool spr_allowed(struct kvm_vcpu *vcpu, enum priv_level level)
75 {
76 /* PAPR VMs only access supervisor SPRs */
77 if (vcpu->arch.papr_enabled && (level > PRIV_SUPER))
78 return false;
79
80 /* Limit user space to its own small SPR set */
81 if ((vcpu->arch.shared->msr & MSR_PR) && level > PRIV_PROBLEM)
82 return false;
83
84 return true;
85 }
86
87 int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
88 unsigned int inst, int *advance)
89 {
90 int emulated = EMULATE_DONE;
91 int rt = get_rt(inst);
92 int rs = get_rs(inst);
93 int ra = get_ra(inst);
94 int rb = get_rb(inst);
95
96 switch (get_op(inst)) {
97 case 19:
98 switch (get_xop(inst)) {
99 case OP_19_XOP_RFID:
100 case OP_19_XOP_RFI:
101 kvmppc_set_pc(vcpu, vcpu->arch.shared->srr0);
102 kvmppc_set_msr(vcpu, vcpu->arch.shared->srr1);
103 *advance = 0;
104 break;
105
106 default:
107 emulated = EMULATE_FAIL;
108 break;
109 }
110 break;
111 case 31:
112 switch (get_xop(inst)) {
113 case OP_31_XOP_MFMSR:
114 kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->msr);
115 break;
116 case OP_31_XOP_MTMSRD:
117 {
118 ulong rs_val = kvmppc_get_gpr(vcpu, rs);
119 if (inst & 0x10000) {
120 ulong new_msr = vcpu->arch.shared->msr;
121 new_msr &= ~(MSR_RI | MSR_EE);
122 new_msr |= rs_val & (MSR_RI | MSR_EE);
123 vcpu->arch.shared->msr = new_msr;
124 } else
125 kvmppc_set_msr(vcpu, rs_val);
126 break;
127 }
128 case OP_31_XOP_MTMSR:
129 kvmppc_set_msr(vcpu, kvmppc_get_gpr(vcpu, rs));
130 break;
131 case OP_31_XOP_MFSR:
132 {
133 int srnum;
134
135 srnum = kvmppc_get_field(inst, 12 + 32, 15 + 32);
136 if (vcpu->arch.mmu.mfsrin) {
137 u32 sr;
138 sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
139 kvmppc_set_gpr(vcpu, rt, sr);
140 }
141 break;
142 }
143 case OP_31_XOP_MFSRIN:
144 {
145 int srnum;
146
147 srnum = (kvmppc_get_gpr(vcpu, rb) >> 28) & 0xf;
148 if (vcpu->arch.mmu.mfsrin) {
149 u32 sr;
150 sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
151 kvmppc_set_gpr(vcpu, rt, sr);
152 }
153 break;
154 }
155 case OP_31_XOP_MTSR:
156 vcpu->arch.mmu.mtsrin(vcpu,
157 (inst >> 16) & 0xf,
158 kvmppc_get_gpr(vcpu, rs));
159 break;
160 case OP_31_XOP_MTSRIN:
161 vcpu->arch.mmu.mtsrin(vcpu,
162 (kvmppc_get_gpr(vcpu, rb) >> 28) & 0xf,
163 kvmppc_get_gpr(vcpu, rs));
164 break;
165 case OP_31_XOP_TLBIE:
166 case OP_31_XOP_TLBIEL:
167 {
168 bool large = (inst & 0x00200000) ? true : false;
169 ulong addr = kvmppc_get_gpr(vcpu, rb);
170 vcpu->arch.mmu.tlbie(vcpu, addr, large);
171 break;
172 }
173 case OP_31_XOP_EIOIO:
174 break;
175 case OP_31_XOP_SLBMTE:
176 if (!vcpu->arch.mmu.slbmte)
177 return EMULATE_FAIL;
178
179 vcpu->arch.mmu.slbmte(vcpu,
180 kvmppc_get_gpr(vcpu, rs),
181 kvmppc_get_gpr(vcpu, rb));
182 break;
183 case OP_31_XOP_SLBIE:
184 if (!vcpu->arch.mmu.slbie)
185 return EMULATE_FAIL;
186
187 vcpu->arch.mmu.slbie(vcpu,
188 kvmppc_get_gpr(vcpu, rb));
189 break;
190 case OP_31_XOP_SLBIA:
191 if (!vcpu->arch.mmu.slbia)
192 return EMULATE_FAIL;
193
194 vcpu->arch.mmu.slbia(vcpu);
195 break;
196 case OP_31_XOP_SLBMFEE:
197 if (!vcpu->arch.mmu.slbmfee) {
198 emulated = EMULATE_FAIL;
199 } else {
200 ulong t, rb_val;
201
202 rb_val = kvmppc_get_gpr(vcpu, rb);
203 t = vcpu->arch.mmu.slbmfee(vcpu, rb_val);
204 kvmppc_set_gpr(vcpu, rt, t);
205 }
206 break;
207 case OP_31_XOP_SLBMFEV:
208 if (!vcpu->arch.mmu.slbmfev) {
209 emulated = EMULATE_FAIL;
210 } else {
211 ulong t, rb_val;
212
213 rb_val = kvmppc_get_gpr(vcpu, rb);
214 t = vcpu->arch.mmu.slbmfev(vcpu, rb_val);
215 kvmppc_set_gpr(vcpu, rt, t);
216 }
217 break;
218 case OP_31_XOP_DCBA:
219 /* Gets treated as NOP */
220 break;
221 case OP_31_XOP_DCBZ:
222 {
223 ulong rb_val = kvmppc_get_gpr(vcpu, rb);
224 ulong ra_val = 0;
225 ulong addr, vaddr;
226 u32 zeros[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
227 u32 dsisr;
228 int r;
229
230 if (ra)
231 ra_val = kvmppc_get_gpr(vcpu, ra);
232
233 addr = (ra_val + rb_val) & ~31ULL;
234 if (!(vcpu->arch.shared->msr & MSR_SF))
235 addr &= 0xffffffff;
236 vaddr = addr;
237
238 r = kvmppc_st(vcpu, &addr, 32, zeros, true);
239 if ((r == -ENOENT) || (r == -EPERM)) {
240 struct kvmppc_book3s_shadow_vcpu *svcpu;
241
242 svcpu = svcpu_get(vcpu);
243 *advance = 0;
244 vcpu->arch.shared->dar = vaddr;
245 svcpu->fault_dar = vaddr;
246
247 dsisr = DSISR_ISSTORE;
248 if (r == -ENOENT)
249 dsisr |= DSISR_NOHPTE;
250 else if (r == -EPERM)
251 dsisr |= DSISR_PROTFAULT;
252
253 vcpu->arch.shared->dsisr = dsisr;
254 svcpu->fault_dsisr = dsisr;
255 svcpu_put(svcpu);
256
257 kvmppc_book3s_queue_irqprio(vcpu,
258 BOOK3S_INTERRUPT_DATA_STORAGE);
259 }
260
261 break;
262 }
263 default:
264 emulated = EMULATE_FAIL;
265 }
266 break;
267 default:
268 emulated = EMULATE_FAIL;
269 }
270
271 if (emulated == EMULATE_FAIL)
272 emulated = kvmppc_emulate_paired_single(run, vcpu);
273
274 return emulated;
275 }
276
277 void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat, bool upper,
278 u32 val)
279 {
280 if (upper) {
281 /* Upper BAT */
282 u32 bl = (val >> 2) & 0x7ff;
283 bat->bepi_mask = (~bl << 17);
284 bat->bepi = val & 0xfffe0000;
285 bat->vs = (val & 2) ? 1 : 0;
286 bat->vp = (val & 1) ? 1 : 0;
287 bat->raw = (bat->raw & 0xffffffff00000000ULL) | val;
288 } else {
289 /* Lower BAT */
290 bat->brpn = val & 0xfffe0000;
291 bat->wimg = (val >> 3) & 0xf;
292 bat->pp = val & 3;
293 bat->raw = (bat->raw & 0x00000000ffffffffULL) | ((u64)val << 32);
294 }
295 }
296
297 static struct kvmppc_bat *kvmppc_find_bat(struct kvm_vcpu *vcpu, int sprn)
298 {
299 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
300 struct kvmppc_bat *bat;
301
302 switch (sprn) {
303 case SPRN_IBAT0U ... SPRN_IBAT3L:
304 bat = &vcpu_book3s->ibat[(sprn - SPRN_IBAT0U) / 2];
305 break;
306 case SPRN_IBAT4U ... SPRN_IBAT7L:
307 bat = &vcpu_book3s->ibat[4 + ((sprn - SPRN_IBAT4U) / 2)];
308 break;
309 case SPRN_DBAT0U ... SPRN_DBAT3L:
310 bat = &vcpu_book3s->dbat[(sprn - SPRN_DBAT0U) / 2];
311 break;
312 case SPRN_DBAT4U ... SPRN_DBAT7L:
313 bat = &vcpu_book3s->dbat[4 + ((sprn - SPRN_DBAT4U) / 2)];
314 break;
315 default:
316 BUG();
317 }
318
319 return bat;
320 }
321
322 int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
323 {
324 int emulated = EMULATE_DONE;
325
326 switch (sprn) {
327 case SPRN_SDR1:
328 if (!spr_allowed(vcpu, PRIV_HYPER))
329 goto unprivileged;
330 to_book3s(vcpu)->sdr1 = spr_val;
331 break;
332 case SPRN_DSISR:
333 vcpu->arch.shared->dsisr = spr_val;
334 break;
335 case SPRN_DAR:
336 vcpu->arch.shared->dar = spr_val;
337 break;
338 case SPRN_HIOR:
339 to_book3s(vcpu)->hior = spr_val;
340 break;
341 case SPRN_IBAT0U ... SPRN_IBAT3L:
342 case SPRN_IBAT4U ... SPRN_IBAT7L:
343 case SPRN_DBAT0U ... SPRN_DBAT3L:
344 case SPRN_DBAT4U ... SPRN_DBAT7L:
345 {
346 struct kvmppc_bat *bat = kvmppc_find_bat(vcpu, sprn);
347
348 kvmppc_set_bat(vcpu, bat, !(sprn % 2), (u32)spr_val);
349 /* BAT writes happen so rarely that we're ok to flush
350 * everything here */
351 kvmppc_mmu_pte_flush(vcpu, 0, 0);
352 kvmppc_mmu_flush_segments(vcpu);
353 break;
354 }
355 case SPRN_HID0:
356 to_book3s(vcpu)->hid[0] = spr_val;
357 break;
358 case SPRN_HID1:
359 to_book3s(vcpu)->hid[1] = spr_val;
360 break;
361 case SPRN_HID2:
362 to_book3s(vcpu)->hid[2] = spr_val;
363 break;
364 case SPRN_HID2_GEKKO:
365 to_book3s(vcpu)->hid[2] = spr_val;
366 /* HID2.PSE controls paired single on gekko */
367 switch (vcpu->arch.pvr) {
368 case 0x00080200: /* lonestar 2.0 */
369 case 0x00088202: /* lonestar 2.2 */
370 case 0x70000100: /* gekko 1.0 */
371 case 0x00080100: /* gekko 2.0 */
372 case 0x00083203: /* gekko 2.3a */
373 case 0x00083213: /* gekko 2.3b */
374 case 0x00083204: /* gekko 2.4 */
375 case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */
376 case 0x00087200: /* broadway */
377 if (vcpu->arch.hflags & BOOK3S_HFLAG_NATIVE_PS) {
378 /* Native paired singles */
379 } else if (spr_val & (1 << 29)) { /* HID2.PSE */
380 vcpu->arch.hflags |= BOOK3S_HFLAG_PAIRED_SINGLE;
381 kvmppc_giveup_ext(vcpu, MSR_FP);
382 } else {
383 vcpu->arch.hflags &= ~BOOK3S_HFLAG_PAIRED_SINGLE;
384 }
385 break;
386 }
387 break;
388 case SPRN_HID4:
389 case SPRN_HID4_GEKKO:
390 to_book3s(vcpu)->hid[4] = spr_val;
391 break;
392 case SPRN_HID5:
393 to_book3s(vcpu)->hid[5] = spr_val;
394 /* guest HID5 set can change is_dcbz32 */
395 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
396 (mfmsr() & MSR_HV))
397 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
398 break;
399 case SPRN_PURR:
400 to_book3s(vcpu)->purr_offset = spr_val - get_tb();
401 break;
402 case SPRN_SPURR:
403 to_book3s(vcpu)->spurr_offset = spr_val - get_tb();
404 break;
405 case SPRN_GQR0:
406 case SPRN_GQR1:
407 case SPRN_GQR2:
408 case SPRN_GQR3:
409 case SPRN_GQR4:
410 case SPRN_GQR5:
411 case SPRN_GQR6:
412 case SPRN_GQR7:
413 to_book3s(vcpu)->gqr[sprn - SPRN_GQR0] = spr_val;
414 break;
415 case SPRN_ICTC:
416 case SPRN_THRM1:
417 case SPRN_THRM2:
418 case SPRN_THRM3:
419 case SPRN_CTRLF:
420 case SPRN_CTRLT:
421 case SPRN_L2CR:
422 case SPRN_DSCR:
423 case SPRN_MMCR0_GEKKO:
424 case SPRN_MMCR1_GEKKO:
425 case SPRN_PMC1_GEKKO:
426 case SPRN_PMC2_GEKKO:
427 case SPRN_PMC3_GEKKO:
428 case SPRN_PMC4_GEKKO:
429 case SPRN_WPAR_GEKKO:
430 break;
431 unprivileged:
432 default:
433 printk(KERN_INFO "KVM: invalid SPR write: %d\n", sprn);
434 #ifndef DEBUG_SPR
435 emulated = EMULATE_FAIL;
436 #endif
437 break;
438 }
439
440 return emulated;
441 }
442
443 int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
444 {
445 int emulated = EMULATE_DONE;
446
447 switch (sprn) {
448 case SPRN_IBAT0U ... SPRN_IBAT3L:
449 case SPRN_IBAT4U ... SPRN_IBAT7L:
450 case SPRN_DBAT0U ... SPRN_DBAT3L:
451 case SPRN_DBAT4U ... SPRN_DBAT7L:
452 {
453 struct kvmppc_bat *bat = kvmppc_find_bat(vcpu, sprn);
454
455 if (sprn % 2)
456 *spr_val = bat->raw >> 32;
457 else
458 *spr_val = bat->raw;
459
460 break;
461 }
462 case SPRN_SDR1:
463 if (!spr_allowed(vcpu, PRIV_HYPER))
464 goto unprivileged;
465 *spr_val = to_book3s(vcpu)->sdr1;
466 break;
467 case SPRN_DSISR:
468 *spr_val = vcpu->arch.shared->dsisr;
469 break;
470 case SPRN_DAR:
471 *spr_val = vcpu->arch.shared->dar;
472 break;
473 case SPRN_HIOR:
474 *spr_val = to_book3s(vcpu)->hior;
475 break;
476 case SPRN_HID0:
477 *spr_val = to_book3s(vcpu)->hid[0];
478 break;
479 case SPRN_HID1:
480 *spr_val = to_book3s(vcpu)->hid[1];
481 break;
482 case SPRN_HID2:
483 case SPRN_HID2_GEKKO:
484 *spr_val = to_book3s(vcpu)->hid[2];
485 break;
486 case SPRN_HID4:
487 case SPRN_HID4_GEKKO:
488 *spr_val = to_book3s(vcpu)->hid[4];
489 break;
490 case SPRN_HID5:
491 *spr_val = to_book3s(vcpu)->hid[5];
492 break;
493 case SPRN_CFAR:
494 case SPRN_DSCR:
495 *spr_val = 0;
496 break;
497 case SPRN_PURR:
498 *spr_val = get_tb() + to_book3s(vcpu)->purr_offset;
499 break;
500 case SPRN_SPURR:
501 *spr_val = get_tb() + to_book3s(vcpu)->purr_offset;
502 break;
503 case SPRN_GQR0:
504 case SPRN_GQR1:
505 case SPRN_GQR2:
506 case SPRN_GQR3:
507 case SPRN_GQR4:
508 case SPRN_GQR5:
509 case SPRN_GQR6:
510 case SPRN_GQR7:
511 *spr_val = to_book3s(vcpu)->gqr[sprn - SPRN_GQR0];
512 break;
513 case SPRN_THRM1:
514 case SPRN_THRM2:
515 case SPRN_THRM3:
516 case SPRN_CTRLF:
517 case SPRN_CTRLT:
518 case SPRN_L2CR:
519 case SPRN_MMCR0_GEKKO:
520 case SPRN_MMCR1_GEKKO:
521 case SPRN_PMC1_GEKKO:
522 case SPRN_PMC2_GEKKO:
523 case SPRN_PMC3_GEKKO:
524 case SPRN_PMC4_GEKKO:
525 case SPRN_WPAR_GEKKO:
526 *spr_val = 0;
527 break;
528 default:
529 unprivileged:
530 printk(KERN_INFO "KVM: invalid SPR read: %d\n", sprn);
531 #ifndef DEBUG_SPR
532 emulated = EMULATE_FAIL;
533 #endif
534 break;
535 }
536
537 return emulated;
538 }
539
540 u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst)
541 {
542 u32 dsisr = 0;
543
544 /*
545 * This is what the spec says about DSISR bits (not mentioned = 0):
546 *
547 * 12:13 [DS] Set to bits 30:31
548 * 15:16 [X] Set to bits 29:30
549 * 17 [X] Set to bit 25
550 * [D/DS] Set to bit 5
551 * 18:21 [X] Set to bits 21:24
552 * [D/DS] Set to bits 1:4
553 * 22:26 Set to bits 6:10 (RT/RS/FRT/FRS)
554 * 27:31 Set to bits 11:15 (RA)
555 */
556
557 switch (get_op(inst)) {
558 /* D-form */
559 case OP_LFS:
560 case OP_LFD:
561 case OP_STFD:
562 case OP_STFS:
563 dsisr |= (inst >> 12) & 0x4000; /* bit 17 */
564 dsisr |= (inst >> 17) & 0x3c00; /* bits 18:21 */
565 break;
566 /* X-form */
567 case 31:
568 dsisr |= (inst << 14) & 0x18000; /* bits 15:16 */
569 dsisr |= (inst << 8) & 0x04000; /* bit 17 */
570 dsisr |= (inst << 3) & 0x03c00; /* bits 18:21 */
571 break;
572 default:
573 printk(KERN_INFO "KVM: Unaligned instruction 0x%x\n", inst);
574 break;
575 }
576
577 dsisr |= (inst >> 16) & 0x03ff; /* bits 22:31 */
578
579 return dsisr;
580 }
581
582 ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst)
583 {
584 ulong dar = 0;
585 ulong ra = get_ra(inst);
586 ulong rb = get_rb(inst);
587
588 switch (get_op(inst)) {
589 case OP_LFS:
590 case OP_LFD:
591 case OP_STFD:
592 case OP_STFS:
593 if (ra)
594 dar = kvmppc_get_gpr(vcpu, ra);
595 dar += (s32)((s16)inst);
596 break;
597 case 31:
598 if (ra)
599 dar = kvmppc_get_gpr(vcpu, ra);
600 dar += kvmppc_get_gpr(vcpu, rb);
601 break;
602 default:
603 printk(KERN_INFO "KVM: Unaligned instruction 0x%x\n", inst);
604 break;
605 }
606
607 return dar;
608 }
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