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21#include <linux/kvm_host.h>
22#include <linux/err.h>
23#include <linux/slab.h>
24#include <linux/preempt.h>
25#include <linux/sched.h>
26#include <linux/delay.h>
27#include <linux/export.h>
28#include <linux/fs.h>
29#include <linux/anon_inodes.h>
30#include <linux/cpumask.h>
31#include <linux/spinlock.h>
32#include <linux/page-flags.h>
33
34#include <asm/reg.h>
35#include <asm/cputable.h>
36#include <asm/cacheflush.h>
37#include <asm/tlbflush.h>
38#include <asm/uaccess.h>
39#include <asm/io.h>
40#include <asm/kvm_ppc.h>
41#include <asm/kvm_book3s.h>
42#include <asm/mmu_context.h>
43#include <asm/lppaca.h>
44#include <asm/processor.h>
45#include <asm/cputhreads.h>
46#include <asm/page.h>
47#include <asm/hvcall.h>
48#include <linux/gfp.h>
49#include <linux/sched.h>
50#include <linux/vmalloc.h>
51#include <linux/highmem.h>
52
53
54
55
56
57
58
59#define MAX_MEM_ORDER 36
60
61#define LARGE_PAGE_ORDER 24
62
63
64
65
66
67static void kvmppc_end_cede(struct kvm_vcpu *vcpu);
68
69void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
70{
71 local_paca->kvm_hstate.kvm_vcpu = vcpu;
72 local_paca->kvm_hstate.kvm_vcore = vcpu->arch.vcore;
73}
74
75void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
76{
77}
78
79void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
80{
81 vcpu->arch.shregs.msr = msr;
82 kvmppc_end_cede(vcpu);
83}
84
85void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
86{
87 vcpu->arch.pvr = pvr;
88}
89
90void kvmppc_dump_regs(struct kvm_vcpu *vcpu)
91{
92 int r;
93
94 pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id);
95 pr_err("pc = %.16lx msr = %.16llx trap = %x\n",
96 vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap);
97 for (r = 0; r < 16; ++r)
98 pr_err("r%2d = %.16lx r%d = %.16lx\n",
99 r, kvmppc_get_gpr(vcpu, r),
100 r+16, kvmppc_get_gpr(vcpu, r+16));
101 pr_err("ctr = %.16lx lr = %.16lx\n",
102 vcpu->arch.ctr, vcpu->arch.lr);
103 pr_err("srr0 = %.16llx srr1 = %.16llx\n",
104 vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1);
105 pr_err("sprg0 = %.16llx sprg1 = %.16llx\n",
106 vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1);
107 pr_err("sprg2 = %.16llx sprg3 = %.16llx\n",
108 vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3);
109 pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n",
110 vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr);
111 pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar);
112 pr_err("fault dar = %.16lx dsisr = %.8x\n",
113 vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
114 pr_err("SLB (%d entries):\n", vcpu->arch.slb_max);
115 for (r = 0; r < vcpu->arch.slb_max; ++r)
116 pr_err(" ESID = %.16llx VSID = %.16llx\n",
117 vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv);
118 pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n",
119 vcpu->kvm->arch.lpcr, vcpu->kvm->arch.sdr1,
120 vcpu->arch.last_inst);
121}
122
123struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id)
124{
125 int r;
126 struct kvm_vcpu *v, *ret = NULL;
127
128 mutex_lock(&kvm->lock);
129 kvm_for_each_vcpu(r, v, kvm) {
130 if (v->vcpu_id == id) {
131 ret = v;
132 break;
133 }
134 }
135 mutex_unlock(&kvm->lock);
136 return ret;
137}
138
139static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa)
140{
141 vpa->shared_proc = 1;
142 vpa->yield_count = 1;
143}
144
145static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu,
146 unsigned long flags,
147 unsigned long vcpuid, unsigned long vpa)
148{
149 struct kvm *kvm = vcpu->kvm;
150 unsigned long pg_index, ra, len;
151 unsigned long pg_offset;
152 void *va;
153 struct kvm_vcpu *tvcpu;
154
155 tvcpu = kvmppc_find_vcpu(kvm, vcpuid);
156 if (!tvcpu)
157 return H_PARAMETER;
158
159 flags >>= 63 - 18;
160 flags &= 7;
161 if (flags == 0 || flags == 4)
162 return H_PARAMETER;
163 if (flags < 4) {
164 if (vpa & 0x7f)
165 return H_PARAMETER;
166
167 pg_index = vpa >> kvm->arch.ram_porder;
168 pg_offset = vpa & (kvm->arch.ram_psize - 1);
169 if (pg_index >= kvm->arch.ram_npages)
170 return H_PARAMETER;
171 if (kvm->arch.ram_pginfo[pg_index].pfn == 0)
172 return H_PARAMETER;
173 ra = kvm->arch.ram_pginfo[pg_index].pfn << PAGE_SHIFT;
174 ra |= pg_offset;
175 va = __va(ra);
176 if (flags <= 1)
177 len = *(unsigned short *)(va + 4);
178 else
179 len = *(unsigned int *)(va + 4);
180 if (pg_offset + len > kvm->arch.ram_psize)
181 return H_PARAMETER;
182 switch (flags) {
183 case 1:
184 if (len < 640)
185 return H_PARAMETER;
186 tvcpu->arch.vpa = va;
187 init_vpa(vcpu, va);
188 break;
189 case 2:
190 if (len < 48)
191 return H_PARAMETER;
192 if (!tvcpu->arch.vpa)
193 return H_RESOURCE;
194 len -= len % 48;
195 tvcpu->arch.dtl = va;
196 tvcpu->arch.dtl_end = va + len;
197 break;
198 case 3:
199 if (len < 8)
200 return H_PARAMETER;
201 if (!tvcpu->arch.vpa)
202 return H_RESOURCE;
203 tvcpu->arch.slb_shadow = va;
204 len = (len - 16) / 16;
205 tvcpu->arch.slb_shadow = va;
206 break;
207 }
208 } else {
209 switch (flags) {
210 case 5:
211 if (tvcpu->arch.slb_shadow || tvcpu->arch.dtl)
212 return H_RESOURCE;
213 tvcpu->arch.vpa = NULL;
214 break;
215 case 6:
216 tvcpu->arch.dtl = NULL;
217 break;
218 case 7:
219 tvcpu->arch.slb_shadow = NULL;
220 break;
221 }
222 }
223 return H_SUCCESS;
224}
225
226int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
227{
228 unsigned long req = kvmppc_get_gpr(vcpu, 3);
229 unsigned long target, ret = H_SUCCESS;
230 struct kvm_vcpu *tvcpu;
231
232 switch (req) {
233 case H_CEDE:
234 break;
235 case H_PROD:
236 target = kvmppc_get_gpr(vcpu, 4);
237 tvcpu = kvmppc_find_vcpu(vcpu->kvm, target);
238 if (!tvcpu) {
239 ret = H_PARAMETER;
240 break;
241 }
242 tvcpu->arch.prodded = 1;
243 smp_mb();
244 if (vcpu->arch.ceded) {
245 if (waitqueue_active(&vcpu->wq)) {
246 wake_up_interruptible(&vcpu->wq);
247 vcpu->stat.halt_wakeup++;
248 }
249 }
250 break;
251 case H_CONFER:
252 break;
253 case H_REGISTER_VPA:
254 ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4),
255 kvmppc_get_gpr(vcpu, 5),
256 kvmppc_get_gpr(vcpu, 6));
257 break;
258 default:
259 return RESUME_HOST;
260 }
261 kvmppc_set_gpr(vcpu, 3, ret);
262 vcpu->arch.hcall_needed = 0;
263 return RESUME_GUEST;
264}
265
266static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
267 struct task_struct *tsk)
268{
269 int r = RESUME_HOST;
270
271 vcpu->stat.sum_exits++;
272
273 run->exit_reason = KVM_EXIT_UNKNOWN;
274 run->ready_for_interrupt_injection = 1;
275 switch (vcpu->arch.trap) {
276
277 case BOOK3S_INTERRUPT_HV_DECREMENTER:
278 vcpu->stat.dec_exits++;
279 r = RESUME_GUEST;
280 break;
281 case BOOK3S_INTERRUPT_EXTERNAL:
282 vcpu->stat.ext_intr_exits++;
283 r = RESUME_GUEST;
284 break;
285 case BOOK3S_INTERRUPT_PERFMON:
286 r = RESUME_GUEST;
287 break;
288 case BOOK3S_INTERRUPT_PROGRAM:
289 {
290 ulong flags;
291
292
293
294
295
296
297 flags = vcpu->arch.shregs.msr & 0x1f0000ull;
298 kvmppc_core_queue_program(vcpu, flags);
299 r = RESUME_GUEST;
300 break;
301 }
302 case BOOK3S_INTERRUPT_SYSCALL:
303 {
304
305 int i;
306
307 if (vcpu->arch.shregs.msr & MSR_PR) {
308
309 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_SYSCALL);
310 r = RESUME_GUEST;
311 break;
312 }
313 run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3);
314 for (i = 0; i < 9; ++i)
315 run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i);
316 run->exit_reason = KVM_EXIT_PAPR_HCALL;
317 vcpu->arch.hcall_needed = 1;
318 r = RESUME_HOST;
319 break;
320 }
321
322
323
324
325
326 case BOOK3S_INTERRUPT_H_DATA_STORAGE:
327 vcpu->arch.shregs.dsisr = vcpu->arch.fault_dsisr;
328 vcpu->arch.shregs.dar = vcpu->arch.fault_dar;
329 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0);
330 r = RESUME_GUEST;
331 break;
332 case BOOK3S_INTERRUPT_H_INST_STORAGE:
333 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE,
334 0x08000000);
335 r = RESUME_GUEST;
336 break;
337
338
339
340
341
342 case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
343 kvmppc_core_queue_program(vcpu, 0x80000);
344 r = RESUME_GUEST;
345 break;
346 default:
347 kvmppc_dump_regs(vcpu);
348 printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
349 vcpu->arch.trap, kvmppc_get_pc(vcpu),
350 vcpu->arch.shregs.msr);
351 r = RESUME_HOST;
352 BUG();
353 break;
354 }
355
356 return r;
357}
358
359int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
360 struct kvm_sregs *sregs)
361{
362 int i;
363
364 sregs->pvr = vcpu->arch.pvr;
365
366 memset(sregs, 0, sizeof(struct kvm_sregs));
367 for (i = 0; i < vcpu->arch.slb_max; i++) {
368 sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige;
369 sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
370 }
371
372 return 0;
373}
374
375int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
376 struct kvm_sregs *sregs)
377{
378 int i, j;
379
380 kvmppc_set_pvr(vcpu, sregs->pvr);
381
382 j = 0;
383 for (i = 0; i < vcpu->arch.slb_nr; i++) {
384 if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) {
385 vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe;
386 vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv;
387 ++j;
388 }
389 }
390 vcpu->arch.slb_max = j;
391
392 return 0;
393}
394
395int kvmppc_core_check_processor_compat(void)
396{
397 if (cpu_has_feature(CPU_FTR_HVMODE))
398 return 0;
399 return -EIO;
400}
401
402struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
403{
404 struct kvm_vcpu *vcpu;
405 int err = -EINVAL;
406 int core;
407 struct kvmppc_vcore *vcore;
408
409 core = id / threads_per_core;
410 if (core >= KVM_MAX_VCORES)
411 goto out;
412
413 err = -ENOMEM;
414 vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL);
415 if (!vcpu)
416 goto out;
417
418 err = kvm_vcpu_init(vcpu, kvm, id);
419 if (err)
420 goto free_vcpu;
421
422 vcpu->arch.shared = &vcpu->arch.shregs;
423 vcpu->arch.last_cpu = -1;
424 vcpu->arch.mmcr[0] = MMCR0_FC;
425 vcpu->arch.ctrl = CTRL_RUNLATCH;
426
427 vcpu->arch.pvr = mfspr(SPRN_PVR);
428 kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
429
430 kvmppc_mmu_book3s_hv_init(vcpu);
431
432
433
434
435 vcpu->arch.state = KVMPPC_VCPU_STOPPED;
436
437 init_waitqueue_head(&vcpu->arch.cpu_run);
438
439 mutex_lock(&kvm->lock);
440 vcore = kvm->arch.vcores[core];
441 if (!vcore) {
442 vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL);
443 if (vcore) {
444 INIT_LIST_HEAD(&vcore->runnable_threads);
445 spin_lock_init(&vcore->lock);
446 init_waitqueue_head(&vcore->wq);
447 }
448 kvm->arch.vcores[core] = vcore;
449 }
450 mutex_unlock(&kvm->lock);
451
452 if (!vcore)
453 goto free_vcpu;
454
455 spin_lock(&vcore->lock);
456 ++vcore->num_threads;
457 spin_unlock(&vcore->lock);
458 vcpu->arch.vcore = vcore;
459
460 vcpu->arch.cpu_type = KVM_CPU_3S_64;
461 kvmppc_sanity_check(vcpu);
462
463 return vcpu;
464
465free_vcpu:
466 kfree(vcpu);
467out:
468 return ERR_PTR(err);
469}
470
471void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
472{
473 kvm_vcpu_uninit(vcpu);
474 kfree(vcpu);
475}
476
477static void kvmppc_set_timer(struct kvm_vcpu *vcpu)
478{
479 unsigned long dec_nsec, now;
480
481 now = get_tb();
482 if (now > vcpu->arch.dec_expires) {
483
484 kvmppc_core_queue_dec(vcpu);
485 kvmppc_core_deliver_interrupts(vcpu);
486 return;
487 }
488 dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC
489 / tb_ticks_per_sec;
490 hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec),
491 HRTIMER_MODE_REL);
492 vcpu->arch.timer_running = 1;
493}
494
495static void kvmppc_end_cede(struct kvm_vcpu *vcpu)
496{
497 vcpu->arch.ceded = 0;
498 if (vcpu->arch.timer_running) {
499 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
500 vcpu->arch.timer_running = 0;
501 }
502}
503
504extern int __kvmppc_vcore_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
505extern void xics_wake_cpu(int cpu);
506
507static void kvmppc_remove_runnable(struct kvmppc_vcore *vc,
508 struct kvm_vcpu *vcpu)
509{
510 struct kvm_vcpu *v;
511
512 if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
513 return;
514 vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
515 --vc->n_runnable;
516 ++vc->n_busy;
517
518 v = vcpu;
519 list_for_each_entry_continue(v, &vc->runnable_threads, arch.run_list)
520 --v->arch.ptid;
521 list_del(&vcpu->arch.run_list);
522}
523
524static void kvmppc_start_thread(struct kvm_vcpu *vcpu)
525{
526 int cpu;
527 struct paca_struct *tpaca;
528 struct kvmppc_vcore *vc = vcpu->arch.vcore;
529
530 if (vcpu->arch.timer_running) {
531 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
532 vcpu->arch.timer_running = 0;
533 }
534 cpu = vc->pcpu + vcpu->arch.ptid;
535 tpaca = &paca[cpu];
536 tpaca->kvm_hstate.kvm_vcpu = vcpu;
537 tpaca->kvm_hstate.kvm_vcore = vc;
538 tpaca->kvm_hstate.napping = 0;
539 vcpu->cpu = vc->pcpu;
540 smp_wmb();
541#if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
542 if (vcpu->arch.ptid) {
543 tpaca->cpu_start = 0x80;
544 wmb();
545 xics_wake_cpu(cpu);
546 ++vc->n_woken;
547 }
548#endif
549}
550
551static void kvmppc_wait_for_nap(struct kvmppc_vcore *vc)
552{
553 int i;
554
555 HMT_low();
556 i = 0;
557 while (vc->nap_count < vc->n_woken) {
558 if (++i >= 1000000) {
559 pr_err("kvmppc_wait_for_nap timeout %d %d\n",
560 vc->nap_count, vc->n_woken);
561 break;
562 }
563 cpu_relax();
564 }
565 HMT_medium();
566}
567
568
569
570
571
572static int on_primary_thread(void)
573{
574 int cpu = smp_processor_id();
575 int thr = cpu_thread_in_core(cpu);
576
577 if (thr)
578 return 0;
579 while (++thr < threads_per_core)
580 if (cpu_online(cpu + thr))
581 return 0;
582 return 1;
583}
584
585
586
587
588
589static int kvmppc_run_core(struct kvmppc_vcore *vc)
590{
591 struct kvm_vcpu *vcpu, *vcpu0, *vnext;
592 long ret;
593 u64 now;
594 int ptid;
595
596
597 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
598 if (signal_pending(vcpu->arch.run_task))
599 return 0;
600
601
602
603
604
605
606
607 if (threads_per_core > 1 && !on_primary_thread()) {
608 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
609 vcpu->arch.ret = -EBUSY;
610 goto out;
611 }
612
613
614
615
616
617 ptid = 0;
618 vcpu0 = NULL;
619 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) {
620 if (!vcpu->arch.ceded) {
621 if (!ptid)
622 vcpu0 = vcpu;
623 vcpu->arch.ptid = ptid++;
624 }
625 }
626 if (!vcpu0)
627 return 0;
628 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
629 if (vcpu->arch.ceded)
630 vcpu->arch.ptid = ptid++;
631
632 vc->n_woken = 0;
633 vc->nap_count = 0;
634 vc->entry_exit_count = 0;
635 vc->vcore_state = VCORE_RUNNING;
636 vc->in_guest = 0;
637 vc->pcpu = smp_processor_id();
638 vc->napping_threads = 0;
639 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
640 kvmppc_start_thread(vcpu);
641
642 preempt_disable();
643 spin_unlock(&vc->lock);
644
645 kvm_guest_enter();
646 __kvmppc_vcore_entry(NULL, vcpu0);
647
648 spin_lock(&vc->lock);
649
650 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
651 vcpu->cpu = -1;
652
653 if (vc->nap_count < vc->n_woken)
654 kvmppc_wait_for_nap(vc);
655
656 vc->vcore_state = VCORE_EXITING;
657 spin_unlock(&vc->lock);
658
659
660 smp_mb();
661 kvm_guest_exit();
662
663 preempt_enable();
664 kvm_resched(vcpu);
665
666 now = get_tb();
667 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) {
668
669 if (now < vcpu->arch.dec_expires &&
670 kvmppc_core_pending_dec(vcpu))
671 kvmppc_core_dequeue_dec(vcpu);
672
673 ret = RESUME_GUEST;
674 if (vcpu->arch.trap)
675 ret = kvmppc_handle_exit(vcpu->arch.kvm_run, vcpu,
676 vcpu->arch.run_task);
677
678 vcpu->arch.ret = ret;
679 vcpu->arch.trap = 0;
680
681 if (vcpu->arch.ceded) {
682 if (ret != RESUME_GUEST)
683 kvmppc_end_cede(vcpu);
684 else
685 kvmppc_set_timer(vcpu);
686 }
687 }
688
689 spin_lock(&vc->lock);
690 out:
691 vc->vcore_state = VCORE_INACTIVE;
692 list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads,
693 arch.run_list) {
694 if (vcpu->arch.ret != RESUME_GUEST) {
695 kvmppc_remove_runnable(vc, vcpu);
696 wake_up(&vcpu->arch.cpu_run);
697 }
698 }
699
700 return 1;
701}
702
703
704
705
706
707static void kvmppc_wait_for_exec(struct kvm_vcpu *vcpu, int wait_state)
708{
709 DEFINE_WAIT(wait);
710
711 prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state);
712 if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE)
713 schedule();
714 finish_wait(&vcpu->arch.cpu_run, &wait);
715}
716
717
718
719
720
721static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
722{
723 DEFINE_WAIT(wait);
724 struct kvm_vcpu *v;
725 int all_idle = 1;
726
727 prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE);
728 vc->vcore_state = VCORE_SLEEPING;
729 spin_unlock(&vc->lock);
730 list_for_each_entry(v, &vc->runnable_threads, arch.run_list) {
731 if (!v->arch.ceded || v->arch.pending_exceptions) {
732 all_idle = 0;
733 break;
734 }
735 }
736 if (all_idle)
737 schedule();
738 finish_wait(&vc->wq, &wait);
739 spin_lock(&vc->lock);
740 vc->vcore_state = VCORE_INACTIVE;
741}
742
743static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
744{
745 int n_ceded;
746 int prev_state;
747 struct kvmppc_vcore *vc;
748 struct kvm_vcpu *v, *vn;
749
750 kvm_run->exit_reason = 0;
751 vcpu->arch.ret = RESUME_GUEST;
752 vcpu->arch.trap = 0;
753
754
755
756
757 vc = vcpu->arch.vcore;
758 spin_lock(&vc->lock);
759 vcpu->arch.ceded = 0;
760 vcpu->arch.run_task = current;
761 vcpu->arch.kvm_run = kvm_run;
762 prev_state = vcpu->arch.state;
763 vcpu->arch.state = KVMPPC_VCPU_RUNNABLE;
764 list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads);
765 ++vc->n_runnable;
766
767
768
769
770
771
772 if (prev_state == KVMPPC_VCPU_STOPPED) {
773 if (vc->vcore_state == VCORE_RUNNING &&
774 VCORE_EXIT_COUNT(vc) == 0) {
775 vcpu->arch.ptid = vc->n_runnable - 1;
776 kvmppc_start_thread(vcpu);
777 }
778
779 } else if (prev_state == KVMPPC_VCPU_BUSY_IN_HOST)
780 --vc->n_busy;
781
782 while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE &&
783 !signal_pending(current)) {
784 if (vc->n_busy || vc->vcore_state != VCORE_INACTIVE) {
785 spin_unlock(&vc->lock);
786 kvmppc_wait_for_exec(vcpu, TASK_INTERRUPTIBLE);
787 spin_lock(&vc->lock);
788 continue;
789 }
790 n_ceded = 0;
791 list_for_each_entry(v, &vc->runnable_threads, arch.run_list)
792 n_ceded += v->arch.ceded;
793 if (n_ceded == vc->n_runnable)
794 kvmppc_vcore_blocked(vc);
795 else
796 kvmppc_run_core(vc);
797
798 list_for_each_entry_safe(v, vn, &vc->runnable_threads,
799 arch.run_list) {
800 kvmppc_core_deliver_interrupts(v);
801 if (signal_pending(v->arch.run_task)) {
802 kvmppc_remove_runnable(vc, v);
803 v->stat.signal_exits++;
804 v->arch.kvm_run->exit_reason = KVM_EXIT_INTR;
805 v->arch.ret = -EINTR;
806 wake_up(&v->arch.cpu_run);
807 }
808 }
809 }
810
811 if (signal_pending(current)) {
812 if (vc->vcore_state == VCORE_RUNNING ||
813 vc->vcore_state == VCORE_EXITING) {
814 spin_unlock(&vc->lock);
815 kvmppc_wait_for_exec(vcpu, TASK_UNINTERRUPTIBLE);
816 spin_lock(&vc->lock);
817 }
818 if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) {
819 kvmppc_remove_runnable(vc, vcpu);
820 vcpu->stat.signal_exits++;
821 kvm_run->exit_reason = KVM_EXIT_INTR;
822 vcpu->arch.ret = -EINTR;
823 }
824 }
825
826 spin_unlock(&vc->lock);
827 return vcpu->arch.ret;
828}
829
830int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu)
831{
832 int r;
833
834 if (!vcpu->arch.sane) {
835 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
836 return -EINVAL;
837 }
838
839
840 if (signal_pending(current)) {
841 run->exit_reason = KVM_EXIT_INTR;
842 return -EINTR;
843 }
844
845
846 if (!vcpu->kvm->arch.rma && cpu_has_feature(CPU_FTR_ARCH_201))
847 return -EPERM;
848
849 flush_fp_to_thread(current);
850 flush_altivec_to_thread(current);
851 flush_vsx_to_thread(current);
852 vcpu->arch.wqp = &vcpu->arch.vcore->wq;
853
854 do {
855 r = kvmppc_run_vcpu(run, vcpu);
856
857 if (run->exit_reason == KVM_EXIT_PAPR_HCALL &&
858 !(vcpu->arch.shregs.msr & MSR_PR)) {
859 r = kvmppc_pseries_do_hcall(vcpu);
860 kvmppc_core_deliver_interrupts(vcpu);
861 }
862 } while (r == RESUME_GUEST);
863 return r;
864}
865
866static long kvmppc_stt_npages(unsigned long window_size)
867{
868 return ALIGN((window_size >> SPAPR_TCE_SHIFT)
869 * sizeof(u64), PAGE_SIZE) / PAGE_SIZE;
870}
871
872static void release_spapr_tce_table(struct kvmppc_spapr_tce_table *stt)
873{
874 struct kvm *kvm = stt->kvm;
875 int i;
876
877 mutex_lock(&kvm->lock);
878 list_del(&stt->list);
879 for (i = 0; i < kvmppc_stt_npages(stt->window_size); i++)
880 __free_page(stt->pages[i]);
881 kfree(stt);
882 mutex_unlock(&kvm->lock);
883
884 kvm_put_kvm(kvm);
885}
886
887static int kvm_spapr_tce_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
888{
889 struct kvmppc_spapr_tce_table *stt = vma->vm_file->private_data;
890 struct page *page;
891
892 if (vmf->pgoff >= kvmppc_stt_npages(stt->window_size))
893 return VM_FAULT_SIGBUS;
894
895 page = stt->pages[vmf->pgoff];
896 get_page(page);
897 vmf->page = page;
898 return 0;
899}
900
901static const struct vm_operations_struct kvm_spapr_tce_vm_ops = {
902 .fault = kvm_spapr_tce_fault,
903};
904
905static int kvm_spapr_tce_mmap(struct file *file, struct vm_area_struct *vma)
906{
907 vma->vm_ops = &kvm_spapr_tce_vm_ops;
908 return 0;
909}
910
911static int kvm_spapr_tce_release(struct inode *inode, struct file *filp)
912{
913 struct kvmppc_spapr_tce_table *stt = filp->private_data;
914
915 release_spapr_tce_table(stt);
916 return 0;
917}
918
919static struct file_operations kvm_spapr_tce_fops = {
920 .mmap = kvm_spapr_tce_mmap,
921 .release = kvm_spapr_tce_release,
922};
923
924long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
925 struct kvm_create_spapr_tce *args)
926{
927 struct kvmppc_spapr_tce_table *stt = NULL;
928 long npages;
929 int ret = -ENOMEM;
930 int i;
931
932
933 list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) {
934 if (stt->liobn == args->liobn)
935 return -EBUSY;
936 }
937
938 npages = kvmppc_stt_npages(args->window_size);
939
940 stt = kzalloc(sizeof(*stt) + npages* sizeof(struct page *),
941 GFP_KERNEL);
942 if (!stt)
943 goto fail;
944
945 stt->liobn = args->liobn;
946 stt->window_size = args->window_size;
947 stt->kvm = kvm;
948
949 for (i = 0; i < npages; i++) {
950 stt->pages[i] = alloc_page(GFP_KERNEL | __GFP_ZERO);
951 if (!stt->pages[i])
952 goto fail;
953 }
954
955 kvm_get_kvm(kvm);
956
957 mutex_lock(&kvm->lock);
958 list_add(&stt->list, &kvm->arch.spapr_tce_tables);
959
960 mutex_unlock(&kvm->lock);
961
962 return anon_inode_getfd("kvm-spapr-tce", &kvm_spapr_tce_fops,
963 stt, O_RDWR);
964
965fail:
966 if (stt) {
967 for (i = 0; i < npages; i++)
968 if (stt->pages[i])
969 __free_page(stt->pages[i]);
970
971 kfree(stt);
972 }
973 return ret;
974}
975
976
977
978static inline int lpcr_rmls(unsigned long rma_size)
979{
980 switch (rma_size) {
981 case 32ul << 20:
982 if (cpu_has_feature(CPU_FTR_ARCH_206))
983 return 8;
984 return -1;
985 case 64ul << 20:
986 return 3;
987 case 128ul << 20:
988 return 7;
989 case 256ul << 20:
990 return 4;
991 case 1ul << 30:
992 return 2;
993 case 16ul << 30:
994 return 1;
995 case 256ul << 30:
996 return 0;
997 default:
998 return -1;
999 }
1000}
1001
1002static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
1003{
1004 struct kvmppc_rma_info *ri = vma->vm_file->private_data;
1005 struct page *page;
1006
1007 if (vmf->pgoff >= ri->npages)
1008 return VM_FAULT_SIGBUS;
1009
1010 page = pfn_to_page(ri->base_pfn + vmf->pgoff);
1011 get_page(page);
1012 vmf->page = page;
1013 return 0;
1014}
1015
1016static const struct vm_operations_struct kvm_rma_vm_ops = {
1017 .fault = kvm_rma_fault,
1018};
1019
1020static int kvm_rma_mmap(struct file *file, struct vm_area_struct *vma)
1021{
1022 vma->vm_flags |= VM_RESERVED;
1023 vma->vm_ops = &kvm_rma_vm_ops;
1024 return 0;
1025}
1026
1027static int kvm_rma_release(struct inode *inode, struct file *filp)
1028{
1029 struct kvmppc_rma_info *ri = filp->private_data;
1030
1031 kvm_release_rma(ri);
1032 return 0;
1033}
1034
1035static struct file_operations kvm_rma_fops = {
1036 .mmap = kvm_rma_mmap,
1037 .release = kvm_rma_release,
1038};
1039
1040long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret)
1041{
1042 struct kvmppc_rma_info *ri;
1043 long fd;
1044
1045 ri = kvm_alloc_rma();
1046 if (!ri)
1047 return -ENOMEM;
1048
1049 fd = anon_inode_getfd("kvm-rma", &kvm_rma_fops, ri, O_RDWR);
1050 if (fd < 0)
1051 kvm_release_rma(ri);
1052
1053 ret->rma_size = ri->npages << PAGE_SHIFT;
1054 return fd;
1055}
1056
1057static struct page *hva_to_page(unsigned long addr)
1058{
1059 struct page *page[1];
1060 int npages;
1061
1062 might_sleep();
1063
1064 npages = get_user_pages_fast(addr, 1, 1, page);
1065
1066 if (unlikely(npages != 1))
1067 return 0;
1068
1069 return page[0];
1070}
1071
1072int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1073 struct kvm_userspace_memory_region *mem)
1074{
1075 unsigned long psize, porder;
1076 unsigned long i, npages, totalpages;
1077 unsigned long pg_ix;
1078 struct kvmppc_pginfo *pginfo;
1079 unsigned long hva;
1080 struct kvmppc_rma_info *ri = NULL;
1081 struct page *page;
1082
1083
1084 porder = LARGE_PAGE_ORDER;
1085 psize = 1ul << porder;
1086 if ((mem->memory_size & (psize - 1)) ||
1087 (mem->guest_phys_addr & (psize - 1))) {
1088 pr_err("bad memory_size=%llx @ %llx\n",
1089 mem->memory_size, mem->guest_phys_addr);
1090 return -EINVAL;
1091 }
1092
1093 npages = mem->memory_size >> porder;
1094 totalpages = (mem->guest_phys_addr + mem->memory_size) >> porder;
1095
1096
1097 if (totalpages > (1ul << (MAX_MEM_ORDER - LARGE_PAGE_ORDER)))
1098 return -EINVAL;
1099
1100
1101 if (mem->guest_phys_addr == 0 && kvm->arch.rma)
1102 return -EINVAL;
1103
1104 if (totalpages > kvm->arch.ram_npages)
1105 kvm->arch.ram_npages = totalpages;
1106
1107
1108 if (mem->guest_phys_addr == 0) {
1109 struct vm_area_struct *vma;
1110
1111 down_read(¤t->mm->mmap_sem);
1112 vma = find_vma(current->mm, mem->userspace_addr);
1113 if (vma && vma->vm_file &&
1114 vma->vm_file->f_op == &kvm_rma_fops &&
1115 mem->userspace_addr == vma->vm_start)
1116 ri = vma->vm_file->private_data;
1117 up_read(¤t->mm->mmap_sem);
1118 if (!ri && cpu_has_feature(CPU_FTR_ARCH_201)) {
1119 pr_err("CPU requires an RMO\n");
1120 return -EINVAL;
1121 }
1122 }
1123
1124 if (ri) {
1125 unsigned long rma_size;
1126 unsigned long lpcr;
1127 long rmls;
1128
1129 rma_size = ri->npages << PAGE_SHIFT;
1130 if (rma_size > mem->memory_size)
1131 rma_size = mem->memory_size;
1132 rmls = lpcr_rmls(rma_size);
1133 if (rmls < 0) {
1134 pr_err("Can't use RMA of 0x%lx bytes\n", rma_size);
1135 return -EINVAL;
1136 }
1137 atomic_inc(&ri->use_count);
1138 kvm->arch.rma = ri;
1139 kvm->arch.n_rma_pages = rma_size >> porder;
1140
1141
1142 lpcr = kvm->arch.lpcr;
1143 if (cpu_has_feature(CPU_FTR_ARCH_201)) {
1144
1145 lpcr &= ~((1ul << HID4_RMLS0_SH) |
1146 (3ul << HID4_RMLS2_SH));
1147 lpcr |= ((rmls >> 2) << HID4_RMLS0_SH) |
1148 ((rmls & 3) << HID4_RMLS2_SH);
1149
1150 lpcr |= ((ri->base_pfn >> (26 - PAGE_SHIFT)) & 0xffff)
1151 << HID4_RMOR_SH;
1152 } else {
1153
1154 lpcr &= ~(LPCR_VPM0 | LPCR_VRMA_L);
1155 lpcr |= rmls << LPCR_RMLS_SH;
1156 kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT;
1157 }
1158 kvm->arch.lpcr = lpcr;
1159 pr_info("Using RMO at %lx size %lx (LPCR = %lx)\n",
1160 ri->base_pfn << PAGE_SHIFT, rma_size, lpcr);
1161 }
1162
1163 pg_ix = mem->guest_phys_addr >> porder;
1164 pginfo = kvm->arch.ram_pginfo + pg_ix;
1165 for (i = 0; i < npages; ++i, ++pg_ix) {
1166 if (ri && pg_ix < kvm->arch.n_rma_pages) {
1167 pginfo[i].pfn = ri->base_pfn +
1168 (pg_ix << (porder - PAGE_SHIFT));
1169 continue;
1170 }
1171 hva = mem->userspace_addr + (i << porder);
1172 page = hva_to_page(hva);
1173 if (!page) {
1174 pr_err("oops, no pfn for hva %lx\n", hva);
1175 goto err;
1176 }
1177
1178 if (!PageHead(page) ||
1179 compound_order(page) != (LARGE_PAGE_ORDER - PAGE_SHIFT)) {
1180 pr_err("page at %lx isn't 16MB (o=%d)\n",
1181 hva, compound_order(page));
1182 goto err;
1183 }
1184 pginfo[i].pfn = page_to_pfn(page);
1185 }
1186
1187 return 0;
1188
1189 err:
1190 return -EINVAL;
1191}
1192
1193void kvmppc_core_commit_memory_region(struct kvm *kvm,
1194 struct kvm_userspace_memory_region *mem)
1195{
1196 if (mem->guest_phys_addr == 0 && mem->memory_size != 0 &&
1197 !kvm->arch.rma)
1198 kvmppc_map_vrma(kvm, mem);
1199}
1200
1201int kvmppc_core_init_vm(struct kvm *kvm)
1202{
1203 long r;
1204 unsigned long npages = 1ul << (MAX_MEM_ORDER - LARGE_PAGE_ORDER);
1205 long err = -ENOMEM;
1206 unsigned long lpcr;
1207
1208
1209 r = kvmppc_alloc_hpt(kvm);
1210 if (r)
1211 return r;
1212
1213 INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
1214
1215 kvm->arch.ram_pginfo = kzalloc(npages * sizeof(struct kvmppc_pginfo),
1216 GFP_KERNEL);
1217 if (!kvm->arch.ram_pginfo) {
1218 pr_err("kvmppc_core_init_vm: couldn't alloc %lu bytes\n",
1219 npages * sizeof(struct kvmppc_pginfo));
1220 goto out_free;
1221 }
1222
1223 kvm->arch.ram_npages = 0;
1224 kvm->arch.ram_psize = 1ul << LARGE_PAGE_ORDER;
1225 kvm->arch.ram_porder = LARGE_PAGE_ORDER;
1226 kvm->arch.rma = NULL;
1227 kvm->arch.n_rma_pages = 0;
1228
1229 kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
1230
1231 if (cpu_has_feature(CPU_FTR_ARCH_201)) {
1232
1233 unsigned long lpid = kvm->arch.lpid;
1234 kvm->arch.host_lpid = 0;
1235 kvm->arch.host_lpcr = lpcr = mfspr(SPRN_HID4);
1236 lpcr &= ~((3 << HID4_LPID1_SH) | (0xful << HID4_LPID5_SH));
1237 lpcr |= ((lpid >> 4) << HID4_LPID1_SH) |
1238 ((lpid & 0xf) << HID4_LPID5_SH);
1239 } else {
1240
1241 kvm->arch.host_lpid = mfspr(SPRN_LPID);
1242 kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR);
1243 lpcr &= LPCR_PECE | LPCR_LPES;
1244 lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE |
1245 LPCR_VPM0 | LPCR_VRMA_L;
1246 }
1247 kvm->arch.lpcr = lpcr;
1248
1249 return 0;
1250
1251 out_free:
1252 kvmppc_free_hpt(kvm);
1253 return err;
1254}
1255
1256void kvmppc_core_destroy_vm(struct kvm *kvm)
1257{
1258 struct kvmppc_pginfo *pginfo;
1259 unsigned long i;
1260
1261 if (kvm->arch.ram_pginfo) {
1262 pginfo = kvm->arch.ram_pginfo;
1263 kvm->arch.ram_pginfo = NULL;
1264 for (i = kvm->arch.n_rma_pages; i < kvm->arch.ram_npages; ++i)
1265 if (pginfo[i].pfn)
1266 put_page(pfn_to_page(pginfo[i].pfn));
1267 kfree(pginfo);
1268 }
1269 if (kvm->arch.rma) {
1270 kvm_release_rma(kvm->arch.rma);
1271 kvm->arch.rma = NULL;
1272 }
1273
1274 kvmppc_free_hpt(kvm);
1275 WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
1276}
1277
1278
1279void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
1280{
1281}
1282
1283
1284int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
1285 unsigned int inst, int *advance)
1286{
1287 return EMULATE_FAIL;
1288}
1289
1290int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
1291{
1292 return EMULATE_FAIL;
1293}
1294
1295int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
1296{
1297 return EMULATE_FAIL;
1298}
1299
1300static int kvmppc_book3s_hv_init(void)
1301{
1302 int r;
1303
1304 r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
1305
1306 if (r)
1307 return r;
1308
1309 r = kvmppc_mmu_hv_init();
1310
1311 return r;
1312}
1313
1314static void kvmppc_book3s_hv_exit(void)
1315{
1316 kvm_exit();
1317}
1318
1319module_init(kvmppc_book3s_hv_init);
1320module_exit(kvmppc_book3s_hv_exit);
1321
