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[deliverable/linux.git] / arch / powerpc / kvm / book3s_emulate.c
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 #include "book3s.h"
27
28 #define OP_19_XOP_RFID 18
29 #define OP_19_XOP_RFI 50
30
31 #define OP_31_XOP_MFMSR 83
32 #define OP_31_XOP_MTMSR 146
33 #define OP_31_XOP_MTMSRD 178
34 #define OP_31_XOP_MTSR 210
35 #define OP_31_XOP_MTSRIN 242
36 #define OP_31_XOP_TLBIEL 274
37 #define OP_31_XOP_TLBIE 306
38 /* Opcode is officially reserved, reuse it as sc 1 when sc 1 doesn't trap */
39 #define OP_31_XOP_FAKE_SC1 308
40 #define OP_31_XOP_SLBMTE 402
41 #define OP_31_XOP_SLBIE 434
42 #define OP_31_XOP_SLBIA 498
43 #define OP_31_XOP_MFSR 595
44 #define OP_31_XOP_MFSRIN 659
45 #define OP_31_XOP_DCBA 758
46 #define OP_31_XOP_SLBMFEV 851
47 #define OP_31_XOP_EIOIO 854
48 #define OP_31_XOP_SLBMFEE 915
49
50 /* DCBZ is actually 1014, but we patch it to 1010 so we get a trap */
51 #define OP_31_XOP_DCBZ 1010
52
53 #define OP_LFS 48
54 #define OP_LFD 50
55 #define OP_STFS 52
56 #define OP_STFD 54
57
58 #define SPRN_GQR0 912
59 #define SPRN_GQR1 913
60 #define SPRN_GQR2 914
61 #define SPRN_GQR3 915
62 #define SPRN_GQR4 916
63 #define SPRN_GQR5 917
64 #define SPRN_GQR6 918
65 #define SPRN_GQR7 919
66
67 /* Book3S_32 defines mfsrin(v) - but that messes up our abstract
68 * function pointers, so let's just disable the define. */
69 #undef mfsrin
70
71 enum priv_level {
72 PRIV_PROBLEM = 0,
73 PRIV_SUPER = 1,
74 PRIV_HYPER = 2,
75 };
76
77 static bool spr_allowed(struct kvm_vcpu *vcpu, enum priv_level level)
78 {
79 /* PAPR VMs only access supervisor SPRs */
80 if (vcpu->arch.papr_enabled && (level > PRIV_SUPER))
81 return false;
82
83 /* Limit user space to its own small SPR set */
84 if ((kvmppc_get_msr(vcpu) & MSR_PR) && level > PRIV_PROBLEM)
85 return false;
86
87 return true;
88 }
89
90 int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
91 unsigned int inst, int *advance)
92 {
93 int emulated = EMULATE_DONE;
94 int rt = get_rt(inst);
95 int rs = get_rs(inst);
96 int ra = get_ra(inst);
97 int rb = get_rb(inst);
98 u32 inst_sc = 0x44000002;
99
100 switch (get_op(inst)) {
101 case 0:
102 emulated = EMULATE_FAIL;
103 if ((kvmppc_get_msr(vcpu) & MSR_LE) &&
104 (inst == swab32(inst_sc))) {
105 /*
106 * This is the byte reversed syscall instruction of our
107 * hypercall handler. Early versions of LE Linux didn't
108 * swap the instructions correctly and ended up in
109 * illegal instructions.
110 * Just always fail hypercalls on these broken systems.
111 */
112 kvmppc_set_gpr(vcpu, 3, EV_UNIMPLEMENTED);
113 kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4);
114 emulated = EMULATE_DONE;
115 }
116 break;
117 case 19:
118 switch (get_xop(inst)) {
119 case OP_19_XOP_RFID:
120 case OP_19_XOP_RFI:
121 kvmppc_set_pc(vcpu, kvmppc_get_srr0(vcpu));
122 kvmppc_set_msr(vcpu, kvmppc_get_srr1(vcpu));
123 *advance = 0;
124 break;
125
126 default:
127 emulated = EMULATE_FAIL;
128 break;
129 }
130 break;
131 case 31:
132 switch (get_xop(inst)) {
133 case OP_31_XOP_MFMSR:
134 kvmppc_set_gpr(vcpu, rt, kvmppc_get_msr(vcpu));
135 break;
136 case OP_31_XOP_MTMSRD:
137 {
138 ulong rs_val = kvmppc_get_gpr(vcpu, rs);
139 if (inst & 0x10000) {
140 ulong new_msr = kvmppc_get_msr(vcpu);
141 new_msr &= ~(MSR_RI | MSR_EE);
142 new_msr |= rs_val & (MSR_RI | MSR_EE);
143 kvmppc_set_msr_fast(vcpu, new_msr);
144 } else
145 kvmppc_set_msr(vcpu, rs_val);
146 break;
147 }
148 case OP_31_XOP_MTMSR:
149 kvmppc_set_msr(vcpu, kvmppc_get_gpr(vcpu, rs));
150 break;
151 case OP_31_XOP_MFSR:
152 {
153 int srnum;
154
155 srnum = kvmppc_get_field(inst, 12 + 32, 15 + 32);
156 if (vcpu->arch.mmu.mfsrin) {
157 u32 sr;
158 sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
159 kvmppc_set_gpr(vcpu, rt, sr);
160 }
161 break;
162 }
163 case OP_31_XOP_MFSRIN:
164 {
165 int srnum;
166
167 srnum = (kvmppc_get_gpr(vcpu, rb) >> 28) & 0xf;
168 if (vcpu->arch.mmu.mfsrin) {
169 u32 sr;
170 sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
171 kvmppc_set_gpr(vcpu, rt, sr);
172 }
173 break;
174 }
175 case OP_31_XOP_MTSR:
176 vcpu->arch.mmu.mtsrin(vcpu,
177 (inst >> 16) & 0xf,
178 kvmppc_get_gpr(vcpu, rs));
179 break;
180 case OP_31_XOP_MTSRIN:
181 vcpu->arch.mmu.mtsrin(vcpu,
182 (kvmppc_get_gpr(vcpu, rb) >> 28) & 0xf,
183 kvmppc_get_gpr(vcpu, rs));
184 break;
185 case OP_31_XOP_TLBIE:
186 case OP_31_XOP_TLBIEL:
187 {
188 bool large = (inst & 0x00200000) ? true : false;
189 ulong addr = kvmppc_get_gpr(vcpu, rb);
190 vcpu->arch.mmu.tlbie(vcpu, addr, large);
191 break;
192 }
193 #ifdef CONFIG_PPC_BOOK3S_64
194 case OP_31_XOP_FAKE_SC1:
195 {
196 /* SC 1 papr hypercalls */
197 ulong cmd = kvmppc_get_gpr(vcpu, 3);
198 int i;
199
200 if ((kvmppc_get_msr(vcpu) & MSR_PR) ||
201 !vcpu->arch.papr_enabled) {
202 emulated = EMULATE_FAIL;
203 break;
204 }
205
206 if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE)
207 break;
208
209 run->papr_hcall.nr = cmd;
210 for (i = 0; i < 9; ++i) {
211 ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
212 run->papr_hcall.args[i] = gpr;
213 }
214
215 run->exit_reason = KVM_EXIT_PAPR_HCALL;
216 vcpu->arch.hcall_needed = 1;
217 emulated = EMULATE_EXIT_USER;
218 break;
219 }
220 #endif
221 case OP_31_XOP_EIOIO:
222 break;
223 case OP_31_XOP_SLBMTE:
224 if (!vcpu->arch.mmu.slbmte)
225 return EMULATE_FAIL;
226
227 vcpu->arch.mmu.slbmte(vcpu,
228 kvmppc_get_gpr(vcpu, rs),
229 kvmppc_get_gpr(vcpu, rb));
230 break;
231 case OP_31_XOP_SLBIE:
232 if (!vcpu->arch.mmu.slbie)
233 return EMULATE_FAIL;
234
235 vcpu->arch.mmu.slbie(vcpu,
236 kvmppc_get_gpr(vcpu, rb));
237 break;
238 case OP_31_XOP_SLBIA:
239 if (!vcpu->arch.mmu.slbia)
240 return EMULATE_FAIL;
241
242 vcpu->arch.mmu.slbia(vcpu);
243 break;
244 case OP_31_XOP_SLBMFEE:
245 if (!vcpu->arch.mmu.slbmfee) {
246 emulated = EMULATE_FAIL;
247 } else {
248 ulong t, rb_val;
249
250 rb_val = kvmppc_get_gpr(vcpu, rb);
251 t = vcpu->arch.mmu.slbmfee(vcpu, rb_val);
252 kvmppc_set_gpr(vcpu, rt, t);
253 }
254 break;
255 case OP_31_XOP_SLBMFEV:
256 if (!vcpu->arch.mmu.slbmfev) {
257 emulated = EMULATE_FAIL;
258 } else {
259 ulong t, rb_val;
260
261 rb_val = kvmppc_get_gpr(vcpu, rb);
262 t = vcpu->arch.mmu.slbmfev(vcpu, rb_val);
263 kvmppc_set_gpr(vcpu, rt, t);
264 }
265 break;
266 case OP_31_XOP_DCBA:
267 /* Gets treated as NOP */
268 break;
269 case OP_31_XOP_DCBZ:
270 {
271 ulong rb_val = kvmppc_get_gpr(vcpu, rb);
272 ulong ra_val = 0;
273 ulong addr, vaddr;
274 u32 zeros[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
275 u32 dsisr;
276 int r;
277
278 if (ra)
279 ra_val = kvmppc_get_gpr(vcpu, ra);
280
281 addr = (ra_val + rb_val) & ~31ULL;
282 if (!(kvmppc_get_msr(vcpu) & MSR_SF))
283 addr &= 0xffffffff;
284 vaddr = addr;
285
286 r = kvmppc_st(vcpu, &addr, 32, zeros, true);
287 if ((r == -ENOENT) || (r == -EPERM)) {
288 *advance = 0;
289 kvmppc_set_dar(vcpu, vaddr);
290 vcpu->arch.fault_dar = vaddr;
291
292 dsisr = DSISR_ISSTORE;
293 if (r == -ENOENT)
294 dsisr |= DSISR_NOHPTE;
295 else if (r == -EPERM)
296 dsisr |= DSISR_PROTFAULT;
297
298 kvmppc_set_dsisr(vcpu, dsisr);
299 vcpu->arch.fault_dsisr = dsisr;
300
301 kvmppc_book3s_queue_irqprio(vcpu,
302 BOOK3S_INTERRUPT_DATA_STORAGE);
303 }
304
305 break;
306 }
307 default:
308 emulated = EMULATE_FAIL;
309 }
310 break;
311 default:
312 emulated = EMULATE_FAIL;
313 }
314
315 if (emulated == EMULATE_FAIL)
316 emulated = kvmppc_emulate_paired_single(run, vcpu);
317
318 return emulated;
319 }
320
321 void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat, bool upper,
322 u32 val)
323 {
324 if (upper) {
325 /* Upper BAT */
326 u32 bl = (val >> 2) & 0x7ff;
327 bat->bepi_mask = (~bl << 17);
328 bat->bepi = val & 0xfffe0000;
329 bat->vs = (val & 2) ? 1 : 0;
330 bat->vp = (val & 1) ? 1 : 0;
331 bat->raw = (bat->raw & 0xffffffff00000000ULL) | val;
332 } else {
333 /* Lower BAT */
334 bat->brpn = val & 0xfffe0000;
335 bat->wimg = (val >> 3) & 0xf;
336 bat->pp = val & 3;
337 bat->raw = (bat->raw & 0x00000000ffffffffULL) | ((u64)val << 32);
338 }
339 }
340
341 static struct kvmppc_bat *kvmppc_find_bat(struct kvm_vcpu *vcpu, int sprn)
342 {
343 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
344 struct kvmppc_bat *bat;
345
346 switch (sprn) {
347 case SPRN_IBAT0U ... SPRN_IBAT3L:
348 bat = &vcpu_book3s->ibat[(sprn - SPRN_IBAT0U) / 2];
349 break;
350 case SPRN_IBAT4U ... SPRN_IBAT7L:
351 bat = &vcpu_book3s->ibat[4 + ((sprn - SPRN_IBAT4U) / 2)];
352 break;
353 case SPRN_DBAT0U ... SPRN_DBAT3L:
354 bat = &vcpu_book3s->dbat[(sprn - SPRN_DBAT0U) / 2];
355 break;
356 case SPRN_DBAT4U ... SPRN_DBAT7L:
357 bat = &vcpu_book3s->dbat[4 + ((sprn - SPRN_DBAT4U) / 2)];
358 break;
359 default:
360 BUG();
361 }
362
363 return bat;
364 }
365
366 int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
367 {
368 int emulated = EMULATE_DONE;
369
370 switch (sprn) {
371 case SPRN_SDR1:
372 if (!spr_allowed(vcpu, PRIV_HYPER))
373 goto unprivileged;
374 to_book3s(vcpu)->sdr1 = spr_val;
375 break;
376 case SPRN_DSISR:
377 kvmppc_set_dsisr(vcpu, spr_val);
378 break;
379 case SPRN_DAR:
380 kvmppc_set_dar(vcpu, spr_val);
381 break;
382 case SPRN_HIOR:
383 to_book3s(vcpu)->hior = spr_val;
384 break;
385 case SPRN_IBAT0U ... SPRN_IBAT3L:
386 case SPRN_IBAT4U ... SPRN_IBAT7L:
387 case SPRN_DBAT0U ... SPRN_DBAT3L:
388 case SPRN_DBAT4U ... SPRN_DBAT7L:
389 {
390 struct kvmppc_bat *bat = kvmppc_find_bat(vcpu, sprn);
391
392 kvmppc_set_bat(vcpu, bat, !(sprn % 2), (u32)spr_val);
393 /* BAT writes happen so rarely that we're ok to flush
394 * everything here */
395 kvmppc_mmu_pte_flush(vcpu, 0, 0);
396 kvmppc_mmu_flush_segments(vcpu);
397 break;
398 }
399 case SPRN_HID0:
400 to_book3s(vcpu)->hid[0] = spr_val;
401 break;
402 case SPRN_HID1:
403 to_book3s(vcpu)->hid[1] = spr_val;
404 break;
405 case SPRN_HID2:
406 to_book3s(vcpu)->hid[2] = spr_val;
407 break;
408 case SPRN_HID2_GEKKO:
409 to_book3s(vcpu)->hid[2] = spr_val;
410 /* HID2.PSE controls paired single on gekko */
411 switch (vcpu->arch.pvr) {
412 case 0x00080200: /* lonestar 2.0 */
413 case 0x00088202: /* lonestar 2.2 */
414 case 0x70000100: /* gekko 1.0 */
415 case 0x00080100: /* gekko 2.0 */
416 case 0x00083203: /* gekko 2.3a */
417 case 0x00083213: /* gekko 2.3b */
418 case 0x00083204: /* gekko 2.4 */
419 case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */
420 case 0x00087200: /* broadway */
421 if (vcpu->arch.hflags & BOOK3S_HFLAG_NATIVE_PS) {
422 /* Native paired singles */
423 } else if (spr_val & (1 << 29)) { /* HID2.PSE */
424 vcpu->arch.hflags |= BOOK3S_HFLAG_PAIRED_SINGLE;
425 kvmppc_giveup_ext(vcpu, MSR_FP);
426 } else {
427 vcpu->arch.hflags &= ~BOOK3S_HFLAG_PAIRED_SINGLE;
428 }
429 break;
430 }
431 break;
432 case SPRN_HID4:
433 case SPRN_HID4_GEKKO:
434 to_book3s(vcpu)->hid[4] = spr_val;
435 break;
436 case SPRN_HID5:
437 to_book3s(vcpu)->hid[5] = spr_val;
438 /* guest HID5 set can change is_dcbz32 */
439 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
440 (mfmsr() & MSR_HV))
441 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
442 break;
443 case SPRN_GQR0:
444 case SPRN_GQR1:
445 case SPRN_GQR2:
446 case SPRN_GQR3:
447 case SPRN_GQR4:
448 case SPRN_GQR5:
449 case SPRN_GQR6:
450 case SPRN_GQR7:
451 to_book3s(vcpu)->gqr[sprn - SPRN_GQR0] = spr_val;
452 break;
453 #ifdef CONFIG_PPC_BOOK3S_64
454 case SPRN_FSCR:
455 kvmppc_set_fscr(vcpu, spr_val);
456 break;
457 case SPRN_BESCR:
458 vcpu->arch.bescr = spr_val;
459 break;
460 case SPRN_EBBHR:
461 vcpu->arch.ebbhr = spr_val;
462 break;
463 case SPRN_EBBRR:
464 vcpu->arch.ebbrr = spr_val;
465 break;
466 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
467 case SPRN_TFHAR:
468 vcpu->arch.tfhar = spr_val;
469 break;
470 case SPRN_TEXASR:
471 vcpu->arch.texasr = spr_val;
472 break;
473 case SPRN_TFIAR:
474 vcpu->arch.tfiar = spr_val;
475 break;
476 #endif
477 #endif
478 case SPRN_ICTC:
479 case SPRN_THRM1:
480 case SPRN_THRM2:
481 case SPRN_THRM3:
482 case SPRN_CTRLF:
483 case SPRN_CTRLT:
484 case SPRN_L2CR:
485 case SPRN_DSCR:
486 case SPRN_MMCR0_GEKKO:
487 case SPRN_MMCR1_GEKKO:
488 case SPRN_PMC1_GEKKO:
489 case SPRN_PMC2_GEKKO:
490 case SPRN_PMC3_GEKKO:
491 case SPRN_PMC4_GEKKO:
492 case SPRN_WPAR_GEKKO:
493 case SPRN_MSSSR0:
494 case SPRN_DABR:
495 #ifdef CONFIG_PPC_BOOK3S_64
496 case SPRN_MMCRS:
497 case SPRN_MMCRA:
498 case SPRN_MMCR0:
499 case SPRN_MMCR1:
500 case SPRN_MMCR2:
501 #endif
502 break;
503 unprivileged:
504 default:
505 printk(KERN_INFO "KVM: invalid SPR write: %d\n", sprn);
506 #ifndef DEBUG_SPR
507 emulated = EMULATE_FAIL;
508 #endif
509 break;
510 }
511
512 return emulated;
513 }
514
515 int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
516 {
517 int emulated = EMULATE_DONE;
518
519 switch (sprn) {
520 case SPRN_IBAT0U ... SPRN_IBAT3L:
521 case SPRN_IBAT4U ... SPRN_IBAT7L:
522 case SPRN_DBAT0U ... SPRN_DBAT3L:
523 case SPRN_DBAT4U ... SPRN_DBAT7L:
524 {
525 struct kvmppc_bat *bat = kvmppc_find_bat(vcpu, sprn);
526
527 if (sprn % 2)
528 *spr_val = bat->raw >> 32;
529 else
530 *spr_val = bat->raw;
531
532 break;
533 }
534 case SPRN_SDR1:
535 if (!spr_allowed(vcpu, PRIV_HYPER))
536 goto unprivileged;
537 *spr_val = to_book3s(vcpu)->sdr1;
538 break;
539 case SPRN_DSISR:
540 *spr_val = kvmppc_get_dsisr(vcpu);
541 break;
542 case SPRN_DAR:
543 *spr_val = kvmppc_get_dar(vcpu);
544 break;
545 case SPRN_HIOR:
546 *spr_val = to_book3s(vcpu)->hior;
547 break;
548 case SPRN_HID0:
549 *spr_val = to_book3s(vcpu)->hid[0];
550 break;
551 case SPRN_HID1:
552 *spr_val = to_book3s(vcpu)->hid[1];
553 break;
554 case SPRN_HID2:
555 case SPRN_HID2_GEKKO:
556 *spr_val = to_book3s(vcpu)->hid[2];
557 break;
558 case SPRN_HID4:
559 case SPRN_HID4_GEKKO:
560 *spr_val = to_book3s(vcpu)->hid[4];
561 break;
562 case SPRN_HID5:
563 *spr_val = to_book3s(vcpu)->hid[5];
564 break;
565 case SPRN_CFAR:
566 case SPRN_DSCR:
567 *spr_val = 0;
568 break;
569 case SPRN_PURR:
570 /*
571 * On exit we would have updated purr
572 */
573 *spr_val = vcpu->arch.purr;
574 break;
575 case SPRN_SPURR:
576 /*
577 * On exit we would have updated spurr
578 */
579 *spr_val = vcpu->arch.spurr;
580 break;
581 case SPRN_VTB:
582 *spr_val = vcpu->arch.vtb;
583 break;
584 case SPRN_IC:
585 *spr_val = vcpu->arch.ic;
586 break;
587 case SPRN_GQR0:
588 case SPRN_GQR1:
589 case SPRN_GQR2:
590 case SPRN_GQR3:
591 case SPRN_GQR4:
592 case SPRN_GQR5:
593 case SPRN_GQR6:
594 case SPRN_GQR7:
595 *spr_val = to_book3s(vcpu)->gqr[sprn - SPRN_GQR0];
596 break;
597 #ifdef CONFIG_PPC_BOOK3S_64
598 case SPRN_FSCR:
599 *spr_val = vcpu->arch.fscr;
600 break;
601 case SPRN_BESCR:
602 *spr_val = vcpu->arch.bescr;
603 break;
604 case SPRN_EBBHR:
605 *spr_val = vcpu->arch.ebbhr;
606 break;
607 case SPRN_EBBRR:
608 *spr_val = vcpu->arch.ebbrr;
609 break;
610 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
611 case SPRN_TFHAR:
612 *spr_val = vcpu->arch.tfhar;
613 break;
614 case SPRN_TEXASR:
615 *spr_val = vcpu->arch.texasr;
616 break;
617 case SPRN_TFIAR:
618 *spr_val = vcpu->arch.tfiar;
619 break;
620 #endif
621 #endif
622 case SPRN_THRM1:
623 case SPRN_THRM2:
624 case SPRN_THRM3:
625 case SPRN_CTRLF:
626 case SPRN_CTRLT:
627 case SPRN_L2CR:
628 case SPRN_MMCR0_GEKKO:
629 case SPRN_MMCR1_GEKKO:
630 case SPRN_PMC1_GEKKO:
631 case SPRN_PMC2_GEKKO:
632 case SPRN_PMC3_GEKKO:
633 case SPRN_PMC4_GEKKO:
634 case SPRN_WPAR_GEKKO:
635 case SPRN_MSSSR0:
636 case SPRN_DABR:
637 #ifdef CONFIG_PPC_BOOK3S_64
638 case SPRN_MMCRS:
639 case SPRN_MMCRA:
640 case SPRN_MMCR0:
641 case SPRN_MMCR1:
642 case SPRN_MMCR2:
643 case SPRN_TIR:
644 #endif
645 *spr_val = 0;
646 break;
647 default:
648 unprivileged:
649 printk(KERN_INFO "KVM: invalid SPR read: %d\n", sprn);
650 #ifndef DEBUG_SPR
651 emulated = EMULATE_FAIL;
652 #endif
653 break;
654 }
655
656 return emulated;
657 }
658
659 u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst)
660 {
661 return make_dsisr(inst);
662 }
663
664 ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst)
665 {
666 #ifdef CONFIG_PPC_BOOK3S_64
667 /*
668 * Linux's fix_alignment() assumes that DAR is valid, so can we
669 */
670 return vcpu->arch.fault_dar;
671 #else
672 ulong dar = 0;
673 ulong ra = get_ra(inst);
674 ulong rb = get_rb(inst);
675
676 switch (get_op(inst)) {
677 case OP_LFS:
678 case OP_LFD:
679 case OP_STFD:
680 case OP_STFS:
681 if (ra)
682 dar = kvmppc_get_gpr(vcpu, ra);
683 dar += (s32)((s16)inst);
684 break;
685 case 31:
686 if (ra)
687 dar = kvmppc_get_gpr(vcpu, ra);
688 dar += kvmppc_get_gpr(vcpu, rb);
689 break;
690 default:
691 printk(KERN_INFO "KVM: Unaligned instruction 0x%x\n", inst);
692 break;
693 }
694
695 return dar;
696 #endif
697 }
Linux kernel - Deliverables
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