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20#include <linux/jiffies.h>
21#include <linux/hrtimer.h>
22#include <linux/types.h>
23#include <linux/string.h>
24#include <linux/kvm_host.h>
25
26#include <asm/reg.h>
27#include <asm/time.h>
28#include <asm/byteorder.h>
29#include <asm/kvm_ppc.h>
30#include <asm/disassemble.h>
31#include "timing.h"
32#include "trace.h"
33
34#define OP_TRAP 3
35#define OP_TRAP_64 2
36
37#define OP_31_XOP_LWZX 23
38#define OP_31_XOP_LBZX 87
39#define OP_31_XOP_STWX 151
40#define OP_31_XOP_STBX 215
41#define OP_31_XOP_LBZUX 119
42#define OP_31_XOP_STBUX 247
43#define OP_31_XOP_LHZX 279
44#define OP_31_XOP_LHZUX 311
45#define OP_31_XOP_MFSPR 339
46#define OP_31_XOP_LHAX 343
47#define OP_31_XOP_STHX 407
48#define OP_31_XOP_STHUX 439
49#define OP_31_XOP_MTSPR 467
50#define OP_31_XOP_DCBI 470
51#define OP_31_XOP_LWBRX 534
52#define OP_31_XOP_TLBSYNC 566
53#define OP_31_XOP_STWBRX 662
54#define OP_31_XOP_LHBRX 790
55#define OP_31_XOP_STHBRX 918
56
57#define OP_LWZ 32
58#define OP_LWZU 33
59#define OP_LBZ 34
60#define OP_LBZU 35
61#define OP_STW 36
62#define OP_STWU 37
63#define OP_STB 38
64#define OP_STBU 39
65#define OP_LHZ 40
66#define OP_LHZU 41
67#define OP_LHA 42
68#define OP_LHAU 43
69#define OP_STH 44
70#define OP_STHU 45
71
72#ifdef CONFIG_PPC_BOOK3S
73static int kvmppc_dec_enabled(struct kvm_vcpu *vcpu)
74{
75 return 1;
76}
77#else
78static int kvmppc_dec_enabled(struct kvm_vcpu *vcpu)
79{
80 return vcpu->arch.tcr & TCR_DIE;
81}
82#endif
83
84void kvmppc_emulate_dec(struct kvm_vcpu *vcpu)
85{
86 unsigned long dec_nsec;
87
88 pr_debug("mtDEC: %x\n", vcpu->arch.dec);
89#ifdef CONFIG_PPC_BOOK3S
90
91 kvmppc_core_dequeue_dec(vcpu);
92
93
94 if (vcpu->arch.dec & 0x80000000) {
95 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
96 kvmppc_core_queue_dec(vcpu);
97 return;
98 }
99#endif
100 if (kvmppc_dec_enabled(vcpu)) {
101
102
103
104
105 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
106 dec_nsec = vcpu->arch.dec;
107 dec_nsec *= 1000;
108 dec_nsec /= tb_ticks_per_usec;
109 hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec),
110 HRTIMER_MODE_REL);
111 vcpu->arch.dec_jiffies = get_tb();
112 } else {
113 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
114 }
115}
116
117u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb)
118{
119 u64 jd = tb - vcpu->arch.dec_jiffies;
120 return vcpu->arch.dec - jd;
121}
122
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138
139int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
140{
141 u32 inst = kvmppc_get_last_inst(vcpu);
142 u32 ea;
143 int ra;
144 int rb;
145 int rs;
146 int rt;
147 int sprn;
148 enum emulation_result emulated = EMULATE_DONE;
149 int advance = 1;
150
151
152 kvmppc_set_exit_type(vcpu, EMULATED_INST_EXITS);
153
154 pr_debug("Emulating opcode %d / %d\n", get_op(inst), get_xop(inst));
155
156 switch (get_op(inst)) {
157 case OP_TRAP:
158#ifdef CONFIG_PPC_BOOK3S
159 case OP_TRAP_64:
160 kvmppc_core_queue_program(vcpu, SRR1_PROGTRAP);
161#else
162 kvmppc_core_queue_program(vcpu, vcpu->arch.esr | ESR_PTR);
163#endif
164 advance = 0;
165 break;
166
167 case 31:
168 switch (get_xop(inst)) {
169
170 case OP_31_XOP_LWZX:
171 rt = get_rt(inst);
172 emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
173 break;
174
175 case OP_31_XOP_LBZX:
176 rt = get_rt(inst);
177 emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
178 break;
179
180 case OP_31_XOP_LBZUX:
181 rt = get_rt(inst);
182 ra = get_ra(inst);
183 rb = get_rb(inst);
184
185 ea = kvmppc_get_gpr(vcpu, rb);
186 if (ra)
187 ea += kvmppc_get_gpr(vcpu, ra);
188
189 emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
190 kvmppc_set_gpr(vcpu, ra, ea);
191 break;
192
193 case OP_31_XOP_STWX:
194 rs = get_rs(inst);
195 emulated = kvmppc_handle_store(run, vcpu,
196 kvmppc_get_gpr(vcpu, rs),
197 4, 1);
198 break;
199
200 case OP_31_XOP_STBX:
201 rs = get_rs(inst);
202 emulated = kvmppc_handle_store(run, vcpu,
203 kvmppc_get_gpr(vcpu, rs),
204 1, 1);
205 break;
206
207 case OP_31_XOP_STBUX:
208 rs = get_rs(inst);
209 ra = get_ra(inst);
210 rb = get_rb(inst);
211
212 ea = kvmppc_get_gpr(vcpu, rb);
213 if (ra)
214 ea += kvmppc_get_gpr(vcpu, ra);
215
216 emulated = kvmppc_handle_store(run, vcpu,
217 kvmppc_get_gpr(vcpu, rs),
218 1, 1);
219 kvmppc_set_gpr(vcpu, rs, ea);
220 break;
221
222 case OP_31_XOP_LHAX:
223 rt = get_rt(inst);
224 emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1);
225 break;
226
227 case OP_31_XOP_LHZX:
228 rt = get_rt(inst);
229 emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
230 break;
231
232 case OP_31_XOP_LHZUX:
233 rt = get_rt(inst);
234 ra = get_ra(inst);
235 rb = get_rb(inst);
236
237 ea = kvmppc_get_gpr(vcpu, rb);
238 if (ra)
239 ea += kvmppc_get_gpr(vcpu, ra);
240
241 emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
242 kvmppc_set_gpr(vcpu, ra, ea);
243 break;
244
245 case OP_31_XOP_MFSPR:
246 sprn = get_sprn(inst);
247 rt = get_rt(inst);
248
249 switch (sprn) {
250 case SPRN_SRR0:
251 kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->srr0);
252 break;
253 case SPRN_SRR1:
254 kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->srr1);
255 break;
256 case SPRN_PVR:
257 kvmppc_set_gpr(vcpu, rt, vcpu->arch.pvr); break;
258 case SPRN_PIR:
259 kvmppc_set_gpr(vcpu, rt, vcpu->vcpu_id); break;
260 case SPRN_MSSSR0:
261 kvmppc_set_gpr(vcpu, rt, 0); break;
262
263
264
265
266 case SPRN_TBWL:
267 kvmppc_set_gpr(vcpu, rt, get_tb() >> 32); break;
268 case SPRN_TBWU:
269 kvmppc_set_gpr(vcpu, rt, get_tb()); break;
270
271 case SPRN_SPRG0:
272 kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->sprg0);
273 break;
274 case SPRN_SPRG1:
275 kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->sprg1);
276 break;
277 case SPRN_SPRG2:
278 kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->sprg2);
279 break;
280 case SPRN_SPRG3:
281 kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->sprg3);
282 break;
283
284
285
286 case SPRN_DEC:
287 {
288 kvmppc_set_gpr(vcpu, rt,
289 kvmppc_get_dec(vcpu, get_tb()));
290 break;
291 }
292 default:
293 emulated = kvmppc_core_emulate_mfspr(vcpu, sprn, rt);
294 if (emulated == EMULATE_FAIL) {
295 printk("mfspr: unknown spr %x\n", sprn);
296 kvmppc_set_gpr(vcpu, rt, 0);
297 }
298 break;
299 }
300 kvmppc_set_exit_type(vcpu, EMULATED_MFSPR_EXITS);
301 break;
302
303 case OP_31_XOP_STHX:
304 rs = get_rs(inst);
305 ra = get_ra(inst);
306 rb = get_rb(inst);
307
308 emulated = kvmppc_handle_store(run, vcpu,
309 kvmppc_get_gpr(vcpu, rs),
310 2, 1);
311 break;
312
313 case OP_31_XOP_STHUX:
314 rs = get_rs(inst);
315 ra = get_ra(inst);
316 rb = get_rb(inst);
317
318 ea = kvmppc_get_gpr(vcpu, rb);
319 if (ra)
320 ea += kvmppc_get_gpr(vcpu, ra);
321
322 emulated = kvmppc_handle_store(run, vcpu,
323 kvmppc_get_gpr(vcpu, rs),
324 2, 1);
325 kvmppc_set_gpr(vcpu, ra, ea);
326 break;
327
328 case OP_31_XOP_MTSPR:
329 sprn = get_sprn(inst);
330 rs = get_rs(inst);
331 switch (sprn) {
332 case SPRN_SRR0:
333 vcpu->arch.shared->srr0 = kvmppc_get_gpr(vcpu, rs);
334 break;
335 case SPRN_SRR1:
336 vcpu->arch.shared->srr1 = kvmppc_get_gpr(vcpu, rs);
337 break;
338
339
340
341 case SPRN_TBWL: break;
342 case SPRN_TBWU: break;
343
344 case SPRN_MSSSR0: break;
345
346 case SPRN_DEC:
347 vcpu->arch.dec = kvmppc_get_gpr(vcpu, rs);
348 kvmppc_emulate_dec(vcpu);
349 break;
350
351 case SPRN_SPRG0:
352 vcpu->arch.shared->sprg0 = kvmppc_get_gpr(vcpu, rs);
353 break;
354 case SPRN_SPRG1:
355 vcpu->arch.shared->sprg1 = kvmppc_get_gpr(vcpu, rs);
356 break;
357 case SPRN_SPRG2:
358 vcpu->arch.shared->sprg2 = kvmppc_get_gpr(vcpu, rs);
359 break;
360 case SPRN_SPRG3:
361 vcpu->arch.shared->sprg3 = kvmppc_get_gpr(vcpu, rs);
362 break;
363
364 default:
365 emulated = kvmppc_core_emulate_mtspr(vcpu, sprn, rs);
366 if (emulated == EMULATE_FAIL)
367 printk("mtspr: unknown spr %x\n", sprn);
368 break;
369 }
370 kvmppc_set_exit_type(vcpu, EMULATED_MTSPR_EXITS);
371 break;
372
373 case OP_31_XOP_DCBI:
374
375
376
377
378
379 break;
380
381 case OP_31_XOP_LWBRX:
382 rt = get_rt(inst);
383 emulated = kvmppc_handle_load(run, vcpu, rt, 4, 0);
384 break;
385
386 case OP_31_XOP_TLBSYNC:
387 break;
388
389 case OP_31_XOP_STWBRX:
390 rs = get_rs(inst);
391 ra = get_ra(inst);
392 rb = get_rb(inst);
393
394 emulated = kvmppc_handle_store(run, vcpu,
395 kvmppc_get_gpr(vcpu, rs),
396 4, 0);
397 break;
398
399 case OP_31_XOP_LHBRX:
400 rt = get_rt(inst);
401 emulated = kvmppc_handle_load(run, vcpu, rt, 2, 0);
402 break;
403
404 case OP_31_XOP_STHBRX:
405 rs = get_rs(inst);
406 ra = get_ra(inst);
407 rb = get_rb(inst);
408
409 emulated = kvmppc_handle_store(run, vcpu,
410 kvmppc_get_gpr(vcpu, rs),
411 2, 0);
412 break;
413
414 default:
415
416 emulated = EMULATE_FAIL;
417 }
418 break;
419
420 case OP_LWZ:
421 rt = get_rt(inst);
422 emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
423 break;
424
425 case OP_LWZU:
426 ra = get_ra(inst);
427 rt = get_rt(inst);
428 emulated = kvmppc_handle_load(run, vcpu, rt, 4, 1);
429 kvmppc_set_gpr(vcpu, ra, vcpu->arch.paddr_accessed);
430 break;
431
432 case OP_LBZ:
433 rt = get_rt(inst);
434 emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
435 break;
436
437 case OP_LBZU:
438 ra = get_ra(inst);
439 rt = get_rt(inst);
440 emulated = kvmppc_handle_load(run, vcpu, rt, 1, 1);
441 kvmppc_set_gpr(vcpu, ra, vcpu->arch.paddr_accessed);
442 break;
443
444 case OP_STW:
445 rs = get_rs(inst);
446 emulated = kvmppc_handle_store(run, vcpu,
447 kvmppc_get_gpr(vcpu, rs),
448 4, 1);
449 break;
450
451 case OP_STWU:
452 ra = get_ra(inst);
453 rs = get_rs(inst);
454 emulated = kvmppc_handle_store(run, vcpu,
455 kvmppc_get_gpr(vcpu, rs),
456 4, 1);
457 kvmppc_set_gpr(vcpu, ra, vcpu->arch.paddr_accessed);
458 break;
459
460 case OP_STB:
461 rs = get_rs(inst);
462 emulated = kvmppc_handle_store(run, vcpu,
463 kvmppc_get_gpr(vcpu, rs),
464 1, 1);
465 break;
466
467 case OP_STBU:
468 ra = get_ra(inst);
469 rs = get_rs(inst);
470 emulated = kvmppc_handle_store(run, vcpu,
471 kvmppc_get_gpr(vcpu, rs),
472 1, 1);
473 kvmppc_set_gpr(vcpu, ra, vcpu->arch.paddr_accessed);
474 break;
475
476 case OP_LHZ:
477 rt = get_rt(inst);
478 emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
479 break;
480
481 case OP_LHZU:
482 ra = get_ra(inst);
483 rt = get_rt(inst);
484 emulated = kvmppc_handle_load(run, vcpu, rt, 2, 1);
485 kvmppc_set_gpr(vcpu, ra, vcpu->arch.paddr_accessed);
486 break;
487
488 case OP_LHA:
489 rt = get_rt(inst);
490 emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1);
491 break;
492
493 case OP_LHAU:
494 ra = get_ra(inst);
495 rt = get_rt(inst);
496 emulated = kvmppc_handle_loads(run, vcpu, rt, 2, 1);
497 kvmppc_set_gpr(vcpu, ra, vcpu->arch.paddr_accessed);
498 break;
499
500 case OP_STH:
501 rs = get_rs(inst);
502 emulated = kvmppc_handle_store(run, vcpu,
503 kvmppc_get_gpr(vcpu, rs),
504 2, 1);
505 break;
506
507 case OP_STHU:
508 ra = get_ra(inst);
509 rs = get_rs(inst);
510 emulated = kvmppc_handle_store(run, vcpu,
511 kvmppc_get_gpr(vcpu, rs),
512 2, 1);
513 kvmppc_set_gpr(vcpu, ra, vcpu->arch.paddr_accessed);
514 break;
515
516 default:
517 emulated = EMULATE_FAIL;
518 }
519
520 if (emulated == EMULATE_FAIL) {
521 emulated = kvmppc_core_emulate_op(run, vcpu, inst, &advance);
522 if (emulated == EMULATE_AGAIN) {
523 advance = 0;
524 } else if (emulated == EMULATE_FAIL) {
525 advance = 0;
526 printk(KERN_ERR "Couldn't emulate instruction 0x%08x "
527 "(op %d xop %d)\n", inst, get_op(inst), get_xop(inst));
528 kvmppc_core_queue_program(vcpu, 0);
529 }
530 }
531
532 trace_kvm_ppc_instr(inst, kvmppc_get_pc(vcpu), emulated);
533
534
535 if (advance)
536 kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4);
537
538 return emulated;
539}
540
