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KVM: PPC: Enable the PAPR CAP for Book3S
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / powerpc / kvm / book3s_hv.c
CommitLineData
de56a948
PM		 1/*
2 * Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
3 * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
4 *
5 * Authors:
6 * Paul Mackerras <paulus@au1.ibm.com>
7 * Alexander Graf <agraf@suse.de>
8 * Kevin Wolf <mail@kevin-wolf.de>
9 *
10 * Description: KVM functions specific to running on Book 3S
11 * processors in hypervisor mode (specifically POWER7 and later).
12 *
13 * This file is derived from arch/powerpc/kvm/book3s.c,
14 * by Alexander Graf <agraf@suse.de>.
15 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License, version 2, as
18 * published by the Free Software Foundation.
19 */
20
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/fs.h>
28#include <linux/anon_inodes.h>
29#include <linux/cpumask.h>
aa04b4cc
PM		 30#include <linux/spinlock.h>
31#include <linux/page-flags.h>
de56a948
PM		 32
33#include <asm/reg.h>
34#include <asm/cputable.h>
35#include <asm/cacheflush.h>
36#include <asm/tlbflush.h>
37#include <asm/uaccess.h>
38#include <asm/io.h>
39#include <asm/kvm_ppc.h>
40#include <asm/kvm_book3s.h>
41#include <asm/mmu_context.h>
42#include <asm/lppaca.h>
43#include <asm/processor.h>
371fefd6 44#include <asm/cputhreads.h>
aa04b4cc 45#include <asm/page.h>
de56a948
PM		 46#include <linux/gfp.h>
47#include <linux/sched.h>
48#include <linux/vmalloc.h>
49#include <linux/highmem.h>
50
aa04b4cc
PM		 51/*
52 * For now, limit memory to 64GB and require it to be large pages.
53 * This value is chosen because it makes the ram_pginfo array be
54 * 64kB in size, which is about as large as we want to be trying
55 * to allocate with kmalloc.
56 */
57#define MAX_MEM_ORDER 36
58
59#define LARGE_PAGE_ORDER 24 /* 16MB pages */
60
de56a948
PM		 61/* #define EXIT_DEBUG */
62/* #define EXIT_DEBUG_SIMPLE */
63/* #define EXIT_DEBUG_INT */
64
65void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
66{
67 local_paca->kvm_hstate.kvm_vcpu = vcpu;
371fefd6 68 local_paca->kvm_hstate.kvm_vcore = vcpu->arch.vcore;
de56a948
PM		 69}
70
71void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
72{
73}
74
371fefd6
PM		 75static void kvmppc_vcpu_blocked(struct kvm_vcpu *vcpu);
76static void kvmppc_vcpu_unblocked(struct kvm_vcpu *vcpu);
77
de56a948
PM		 78void kvmppc_vcpu_block(struct kvm_vcpu *vcpu)
79{
80 u64 now;
81 unsigned long dec_nsec;
82
83 now = get_tb();
84 if (now >= vcpu->arch.dec_expires && !kvmppc_core_pending_dec(vcpu))
85 kvmppc_core_queue_dec(vcpu);
86 if (vcpu->arch.pending_exceptions)
87 return;
88 if (vcpu->arch.dec_expires != ~(u64)0) {
89 dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC /
90 tb_ticks_per_sec;
91 hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec),
92 HRTIMER_MODE_REL);
93 }
94
371fefd6
PM		 95 kvmppc_vcpu_blocked(vcpu);
96
de56a948
PM		 97 kvm_vcpu_block(vcpu);
98 vcpu->stat.halt_wakeup++;
99
100 if (vcpu->arch.dec_expires != ~(u64)0)
101 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
371fefd6
PM		 102
103 kvmppc_vcpu_unblocked(vcpu);
de56a948
PM		 104}
105
106void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
107{
108 vcpu->arch.shregs.msr = msr;
109}
110
111void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
112{
113 vcpu->arch.pvr = pvr;
114}
115
116void kvmppc_dump_regs(struct kvm_vcpu *vcpu)
117{
118 int r;
119
120 pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id);
121 pr_err("pc = %.16lx msr = %.16llx trap = %x\n",
122 vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap);
123 for (r = 0; r < 16; ++r)
124 pr_err("r%2d = %.16lx r%d = %.16lx\n",
125 r, kvmppc_get_gpr(vcpu, r),
126 r+16, kvmppc_get_gpr(vcpu, r+16));
127 pr_err("ctr = %.16lx lr = %.16lx\n",
128 vcpu->arch.ctr, vcpu->arch.lr);
129 pr_err("srr0 = %.16llx srr1 = %.16llx\n",
130 vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1);
131 pr_err("sprg0 = %.16llx sprg1 = %.16llx\n",
132 vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1);
133 pr_err("sprg2 = %.16llx sprg3 = %.16llx\n",
134 vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3);
135 pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n",
136 vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr);
137 pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar);
138 pr_err("fault dar = %.16lx dsisr = %.8x\n",
139 vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
140 pr_err("SLB (%d entries):\n", vcpu->arch.slb_max);
141 for (r = 0; r < vcpu->arch.slb_max; ++r)
142 pr_err(" ESID = %.16llx VSID = %.16llx\n",
143 vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv);
144 pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n",
aa04b4cc 145 vcpu->kvm->arch.lpcr, vcpu->kvm->arch.sdr1,
de56a948
PM		 146 vcpu->arch.last_inst);
147}
148
a8606e20
PM		 149struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id)
150{
151 int r;
152 struct kvm_vcpu *v, *ret = NULL;
153
154 mutex_lock(&kvm->lock);
155 kvm_for_each_vcpu(r, v, kvm) {
156 if (v->vcpu_id == id) {
157 ret = v;
158 break;
159 }
160 }
161 mutex_unlock(&kvm->lock);
162 return ret;
163}
164
165static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa)
166{
167 vpa->shared_proc = 1;
168 vpa->yield_count = 1;
169}
170
171static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu,
172 unsigned long flags,
173 unsigned long vcpuid, unsigned long vpa)
174{
175 struct kvm *kvm = vcpu->kvm;
176 unsigned long pg_index, ra, len;
177 unsigned long pg_offset;
178 void *va;
179 struct kvm_vcpu *tvcpu;
180
181 tvcpu = kvmppc_find_vcpu(kvm, vcpuid);
182 if (!tvcpu)
183 return H_PARAMETER;
184
185 flags >>= 63 - 18;
186 flags &= 7;
187 if (flags == 0 || flags == 4)
188 return H_PARAMETER;
189 if (flags < 4) {
190 if (vpa & 0x7f)
191 return H_PARAMETER;
192 /* registering new area; convert logical addr to real */
193 pg_index = vpa >> kvm->arch.ram_porder;
194 pg_offset = vpa & (kvm->arch.ram_psize - 1);
195 if (pg_index >= kvm->arch.ram_npages)
196 return H_PARAMETER;
197 if (kvm->arch.ram_pginfo[pg_index].pfn == 0)
198 return H_PARAMETER;
199 ra = kvm->arch.ram_pginfo[pg_index].pfn << PAGE_SHIFT;
200 ra |= pg_offset;
201 va = __va(ra);
202 if (flags <= 1)
203 len = *(unsigned short *)(va + 4);
204 else
205 len = *(unsigned int *)(va + 4);
206 if (pg_offset + len > kvm->arch.ram_psize)
207 return H_PARAMETER;
208 switch (flags) {
209 case 1: /* register VPA */
210 if (len < 640)
211 return H_PARAMETER;
212 tvcpu->arch.vpa = va;
213 init_vpa(vcpu, va);
214 break;
215 case 2: /* register DTL */
216 if (len < 48)
217 return H_PARAMETER;
218 if (!tvcpu->arch.vpa)
219 return H_RESOURCE;
220 len -= len % 48;
221 tvcpu->arch.dtl = va;
222 tvcpu->arch.dtl_end = va + len;
223 break;
224 case 3: /* register SLB shadow buffer */
225 if (len < 8)
226 return H_PARAMETER;
227 if (!tvcpu->arch.vpa)
228 return H_RESOURCE;
229 tvcpu->arch.slb_shadow = va;
230 len = (len - 16) / 16;
231 tvcpu->arch.slb_shadow = va;
232 break;
233 }
234 } else {
235 switch (flags) {
236 case 5: /* unregister VPA */
237 if (tvcpu->arch.slb_shadow || tvcpu->arch.dtl)
238 return H_RESOURCE;
239 tvcpu->arch.vpa = NULL;
240 break;
241 case 6: /* unregister DTL */
242 tvcpu->arch.dtl = NULL;
243 break;
244 case 7: /* unregister SLB shadow buffer */
245 tvcpu->arch.slb_shadow = NULL;
246 break;
247 }
248 }
249 return H_SUCCESS;
250}
251
252int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
253{
254 unsigned long req = kvmppc_get_gpr(vcpu, 3);
255 unsigned long target, ret = H_SUCCESS;
256 struct kvm_vcpu *tvcpu;
257
258 switch (req) {
259 case H_CEDE:
260 vcpu->arch.shregs.msr |= MSR_EE;
261 vcpu->arch.ceded = 1;
262 smp_mb();
263 if (!vcpu->arch.prodded)
264 kvmppc_vcpu_block(vcpu);
265 else
266 vcpu->arch.prodded = 0;
267 smp_mb();
268 vcpu->arch.ceded = 0;
269 break;
270 case H_PROD:
271 target = kvmppc_get_gpr(vcpu, 4);
272 tvcpu = kvmppc_find_vcpu(vcpu->kvm, target);
273 if (!tvcpu) {
274 ret = H_PARAMETER;
275 break;
276 }
277 tvcpu->arch.prodded = 1;
278 smp_mb();
279 if (vcpu->arch.ceded) {
280 if (waitqueue_active(&vcpu->wq)) {
281 wake_up_interruptible(&vcpu->wq);
282 vcpu->stat.halt_wakeup++;
283 }
284 }
285 break;
286 case H_CONFER:
287 break;
288 case H_REGISTER_VPA:
289 ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4),
290 kvmppc_get_gpr(vcpu, 5),
291 kvmppc_get_gpr(vcpu, 6));
292 break;
293 default:
294 return RESUME_HOST;
295 }
296 kvmppc_set_gpr(vcpu, 3, ret);
297 vcpu->arch.hcall_needed = 0;
298 return RESUME_GUEST;
299}
300
de56a948
PM		 301static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
302 struct task_struct *tsk)
303{
304 int r = RESUME_HOST;
305
306 vcpu->stat.sum_exits++;
307
308 run->exit_reason = KVM_EXIT_UNKNOWN;
309 run->ready_for_interrupt_injection = 1;
310 switch (vcpu->arch.trap) {
311 /* We're good on these - the host merely wanted to get our attention */
312 case BOOK3S_INTERRUPT_HV_DECREMENTER:
313 vcpu->stat.dec_exits++;
314 r = RESUME_GUEST;
315 break;
316 case BOOK3S_INTERRUPT_EXTERNAL:
317 vcpu->stat.ext_intr_exits++;
318 r = RESUME_GUEST;
319 break;
320 case BOOK3S_INTERRUPT_PERFMON:
321 r = RESUME_GUEST;
322 break;
323 case BOOK3S_INTERRUPT_PROGRAM:
324 {
325 ulong flags;
326 /*
327 * Normally program interrupts are delivered directly
328 * to the guest by the hardware, but we can get here
329 * as a result of a hypervisor emulation interrupt
330 * (e40) getting turned into a 700 by BML RTAS.
331 */
332 flags = vcpu->arch.shregs.msr & 0x1f0000ull;
333 kvmppc_core_queue_program(vcpu, flags);
334 r = RESUME_GUEST;
335 break;
336 }
337 case BOOK3S_INTERRUPT_SYSCALL:
338 {
339 /* hcall - punt to userspace */
340 int i;
341
342 if (vcpu->arch.shregs.msr & MSR_PR) {
343 /* sc 1 from userspace - reflect to guest syscall */
344 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_SYSCALL);
345 r = RESUME_GUEST;
346 break;
347 }
348 run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3);
349 for (i = 0; i < 9; ++i)
350 run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i);
351 run->exit_reason = KVM_EXIT_PAPR_HCALL;
352 vcpu->arch.hcall_needed = 1;
353 r = RESUME_HOST;
354 break;
355 }
356 /*
357 * We get these next two if the guest does a bad real-mode access,
358 * as we have enabled VRMA (virtualized real mode area) mode in the
359 * LPCR. We just generate an appropriate DSI/ISI to the guest.
360 */
361 case BOOK3S_INTERRUPT_H_DATA_STORAGE:
362 vcpu->arch.shregs.dsisr = vcpu->arch.fault_dsisr;
363 vcpu->arch.shregs.dar = vcpu->arch.fault_dar;
364 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0);
365 r = RESUME_GUEST;
366 break;
367 case BOOK3S_INTERRUPT_H_INST_STORAGE:
368 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE,
369 0x08000000);
370 r = RESUME_GUEST;
371 break;
372 /*
373 * This occurs if the guest executes an illegal instruction.
374 * We just generate a program interrupt to the guest, since
375 * we don't emulate any guest instructions at this stage.
376 */
377 case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
378 kvmppc_core_queue_program(vcpu, 0x80000);
379 r = RESUME_GUEST;
380 break;
381 default:
382 kvmppc_dump_regs(vcpu);
383 printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
384 vcpu->arch.trap, kvmppc_get_pc(vcpu),
385 vcpu->arch.shregs.msr);
386 r = RESUME_HOST;
387 BUG();
388 break;
389 }
390
391
392 if (!(r & RESUME_HOST)) {
393 /* To avoid clobbering exit_reason, only check for signals if
394 * we aren't already exiting to userspace for some other
395 * reason. */
396 if (signal_pending(tsk)) {
397 vcpu->stat.signal_exits++;
398 run->exit_reason = KVM_EXIT_INTR;
399 r = -EINTR;
400 } else {
401 kvmppc_core_deliver_interrupts(vcpu);
402 }
403 }
404
405 return r;
406}
407
408int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
409 struct kvm_sregs *sregs)
410{
411 int i;
412
413 sregs->pvr = vcpu->arch.pvr;
414
415 memset(sregs, 0, sizeof(struct kvm_sregs));
416 for (i = 0; i < vcpu->arch.slb_max; i++) {
417 sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige;
418 sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
419 }
420
421 return 0;
422}
423
424int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
425 struct kvm_sregs *sregs)
426{
427 int i, j;
428
429 kvmppc_set_pvr(vcpu, sregs->pvr);
430
431 j = 0;
432 for (i = 0; i < vcpu->arch.slb_nr; i++) {
433 if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) {
434 vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe;
435 vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv;
436 ++j;
437 }
438 }
439 vcpu->arch.slb_max = j;
440
441 return 0;
442}
443
444int kvmppc_core_check_processor_compat(void)
445{
9e368f29 446 if (cpu_has_feature(CPU_FTR_HVMODE))
de56a948
PM		 447 return 0;
448 return -EIO;
449}
450
451struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
452{
453 struct kvm_vcpu *vcpu;
371fefd6
PM		 454 int err = -EINVAL;
455 int core;
456 struct kvmppc_vcore *vcore;
de56a948 457
371fefd6
PM		 458 core = id / threads_per_core;
459 if (core >= KVM_MAX_VCORES)
460 goto out;
461
462 err = -ENOMEM;
de56a948
PM		 463 vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL);
464 if (!vcpu)
465 goto out;
466
467 err = kvm_vcpu_init(vcpu, kvm, id);
468 if (err)
469 goto free_vcpu;
470
471 vcpu->arch.shared = &vcpu->arch.shregs;
472 vcpu->arch.last_cpu = -1;
473 vcpu->arch.mmcr[0] = MMCR0_FC;
474 vcpu->arch.ctrl = CTRL_RUNLATCH;
475 /* default to host PVR, since we can't spoof it */
476 vcpu->arch.pvr = mfspr(SPRN_PVR);
477 kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
478
de56a948
PM		 479 kvmppc_mmu_book3s_hv_init(vcpu);
480
371fefd6
PM		 481 /*
482 * Some vcpus may start out in stopped state. If we initialize
483 * them to busy-in-host state they will stop other vcpus in the
484 * vcore from running. Instead we initialize them to blocked
485 * state, effectively considering them to be stopped until we
486 * see the first run ioctl for them.
487 */
488 vcpu->arch.state = KVMPPC_VCPU_BLOCKED;
489
490 init_waitqueue_head(&vcpu->arch.cpu_run);
491
492 mutex_lock(&kvm->lock);
493 vcore = kvm->arch.vcores[core];
494 if (!vcore) {
495 vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL);
496 if (vcore) {
497 INIT_LIST_HEAD(&vcore->runnable_threads);
498 spin_lock_init(&vcore->lock);
499 }
500 kvm->arch.vcores[core] = vcore;
501 }
502 mutex_unlock(&kvm->lock);
503
504 if (!vcore)
505 goto free_vcpu;
506
507 spin_lock(&vcore->lock);
508 ++vcore->num_threads;
509 ++vcore->n_blocked;
510 spin_unlock(&vcore->lock);
511 vcpu->arch.vcore = vcore;
512
de56a948
PM		 513 return vcpu;
514
515free_vcpu:
516 kfree(vcpu);
517out:
518 return ERR_PTR(err);
519}
520
521void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
522{
523 kvm_vcpu_uninit(vcpu);
524 kfree(vcpu);
525}
526
371fefd6
PM		 527static void kvmppc_vcpu_blocked(struct kvm_vcpu *vcpu)
528{
529 struct kvmppc_vcore *vc = vcpu->arch.vcore;
530
531 spin_lock(&vc->lock);
532 vcpu->arch.state = KVMPPC_VCPU_BLOCKED;
533 ++vc->n_blocked;
534 if (vc->n_runnable > 0 &&
535 vc->n_runnable + vc->n_blocked == vc->num_threads) {
536 vcpu = list_first_entry(&vc->runnable_threads, struct kvm_vcpu,
537 arch.run_list);
538 wake_up(&vcpu->arch.cpu_run);
539 }
540 spin_unlock(&vc->lock);
541}
542
543static void kvmppc_vcpu_unblocked(struct kvm_vcpu *vcpu)
544{
545 struct kvmppc_vcore *vc = vcpu->arch.vcore;
546
547 spin_lock(&vc->lock);
548 vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
549 --vc->n_blocked;
550 spin_unlock(&vc->lock);
551}
552
de56a948 553extern int __kvmppc_vcore_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
371fefd6 554extern void xics_wake_cpu(int cpu);
de56a948 555
371fefd6
PM		 556static void kvmppc_remove_runnable(struct kvmppc_vcore *vc,
557 struct kvm_vcpu *vcpu)
de56a948 558{
371fefd6 559 struct kvm_vcpu *v;
de56a948 560
371fefd6
PM		 561 if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
562 return;
563 vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
564 --vc->n_runnable;
565 /* decrement the physical thread id of each following vcpu */
566 v = vcpu;
567 list_for_each_entry_continue(v, &vc->runnable_threads, arch.run_list)
568 --v->arch.ptid;
569 list_del(&vcpu->arch.run_list);
570}
571
572static void kvmppc_start_thread(struct kvm_vcpu *vcpu)
573{
574 int cpu;
575 struct paca_struct *tpaca;
576 struct kvmppc_vcore *vc = vcpu->arch.vcore;
577
578 cpu = vc->pcpu + vcpu->arch.ptid;
579 tpaca = &paca[cpu];
580 tpaca->kvm_hstate.kvm_vcpu = vcpu;
581 tpaca->kvm_hstate.kvm_vcore = vc;
582 smp_wmb();
583#ifdef CONFIG_PPC_ICP_NATIVE
584 if (vcpu->arch.ptid) {
585 tpaca->cpu_start = 0x80;
586 tpaca->kvm_hstate.in_guest = KVM_GUEST_MODE_GUEST;
587 wmb();
588 xics_wake_cpu(cpu);
589 ++vc->n_woken;
de56a948 590 }
371fefd6
PM		 591#endif
592}
de56a948 593
371fefd6
PM		 594static void kvmppc_wait_for_nap(struct kvmppc_vcore *vc)
595{
596 int i;
597
598 HMT_low();
599 i = 0;
600 while (vc->nap_count < vc->n_woken) {
601 if (++i >= 1000000) {
602 pr_err("kvmppc_wait_for_nap timeout %d %d\n",
603 vc->nap_count, vc->n_woken);
604 break;
605 }
606 cpu_relax();
607 }
608 HMT_medium();
609}
610
611/*
612 * Check that we are on thread 0 and that any other threads in
613 * this core are off-line.
614 */
615static int on_primary_thread(void)
616{
617 int cpu = smp_processor_id();
618 int thr = cpu_thread_in_core(cpu);
619
620 if (thr)
621 return 0;
622 while (++thr < threads_per_core)
623 if (cpu_online(cpu + thr))
624 return 0;
625 return 1;
626}
627
628/*
629 * Run a set of guest threads on a physical core.
630 * Called with vc->lock held.
631 */
632static int kvmppc_run_core(struct kvmppc_vcore *vc)
633{
634 struct kvm_vcpu *vcpu, *vnext;
635 long ret;
636 u64 now;
637
638 /* don't start if any threads have a signal pending */
639 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
640 if (signal_pending(vcpu->arch.run_task))
641 return 0;
de56a948
PM		 642
643 /*
644 * Make sure we are running on thread 0, and that
645 * secondary threads are offline.
646 * XXX we should also block attempts to bring any
647 * secondary threads online.
648 */
371fefd6
PM		 649 if (threads_per_core > 1 && !on_primary_thread()) {
650 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
651 vcpu->arch.ret = -EBUSY;
652 goto out;
de56a948
PM		 653 }
654
371fefd6
PM		 655 vc->n_woken = 0;
656 vc->nap_count = 0;
657 vc->entry_exit_count = 0;
658 vc->vcore_running = 1;
659 vc->in_guest = 0;
660 vc->pcpu = smp_processor_id();
661 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
662 kvmppc_start_thread(vcpu);
663 vcpu = list_first_entry(&vc->runnable_threads, struct kvm_vcpu,
664 arch.run_list);
665
666 spin_unlock(&vc->lock);
de56a948 667
371fefd6
PM		 668 preempt_disable();
669 kvm_guest_enter();
de56a948
PM		 670 __kvmppc_vcore_entry(NULL, vcpu);
671
371fefd6
PM		 672 /* wait for secondary threads to finish writing their state to memory */
673 spin_lock(&vc->lock);
674 if (vc->nap_count < vc->n_woken)
675 kvmppc_wait_for_nap(vc);
676 /* prevent other vcpu threads from doing kvmppc_start_thread() now */
677 vc->vcore_running = 2;
678 spin_unlock(&vc->lock);
679
680 /* make sure updates to secondary vcpu structs are visible now */
681 smp_mb();
de56a948
PM		 682 kvm_guest_exit();
683
684 preempt_enable();
685 kvm_resched(vcpu);
686
687 now = get_tb();
371fefd6
PM		 688 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) {
689 /* cancel pending dec exception if dec is positive */
690 if (now < vcpu->arch.dec_expires &&
691 kvmppc_core_pending_dec(vcpu))
692 kvmppc_core_dequeue_dec(vcpu);
693 if (!vcpu->arch.trap) {
694 if (signal_pending(vcpu->arch.run_task)) {
695 vcpu->arch.kvm_run->exit_reason = KVM_EXIT_INTR;
696 vcpu->arch.ret = -EINTR;
697 }
698 continue; /* didn't get to run */
699 }
700 ret = kvmppc_handle_exit(vcpu->arch.kvm_run, vcpu,
701 vcpu->arch.run_task);
702 vcpu->arch.ret = ret;
703 vcpu->arch.trap = 0;
704 }
de56a948 705
371fefd6 706 spin_lock(&vc->lock);
de56a948 707 out:
371fefd6
PM		 708 vc->vcore_running = 0;
709 list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads,
710 arch.run_list) {
711 if (vcpu->arch.ret != RESUME_GUEST) {
712 kvmppc_remove_runnable(vc, vcpu);
713 wake_up(&vcpu->arch.cpu_run);
714 }
715 }
716
717 return 1;
718}
719
720static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
721{
722 int ptid;
723 int wait_state;
724 struct kvmppc_vcore *vc;
725 DEFINE_WAIT(wait);
726
727 /* No need to go into the guest when all we do is going out */
728 if (signal_pending(current)) {
729 kvm_run->exit_reason = KVM_EXIT_INTR;
730 return -EINTR;
731 }
732
9e368f29
PM		 733 /* On PPC970, check that we have an RMA region */
734 if (!vcpu->kvm->arch.rma && cpu_has_feature(CPU_FTR_ARCH_201))
735 return -EPERM;
736
371fefd6
PM		 737 kvm_run->exit_reason = 0;
738 vcpu->arch.ret = RESUME_GUEST;
739 vcpu->arch.trap = 0;
740
741 flush_fp_to_thread(current);
742 flush_altivec_to_thread(current);
743 flush_vsx_to_thread(current);
744
745 /*
746 * Synchronize with other threads in this virtual core
747 */
748 vc = vcpu->arch.vcore;
749 spin_lock(&vc->lock);
750 /* This happens the first time this is called for a vcpu */
751 if (vcpu->arch.state == KVMPPC_VCPU_BLOCKED)
752 --vc->n_blocked;
753 vcpu->arch.state = KVMPPC_VCPU_RUNNABLE;
754 ptid = vc->n_runnable;
755 vcpu->arch.run_task = current;
756 vcpu->arch.kvm_run = kvm_run;
757 vcpu->arch.ptid = ptid;
758 list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads);
759 ++vc->n_runnable;
760
761 wait_state = TASK_INTERRUPTIBLE;
762 while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) {
763 if (signal_pending(current)) {
764 if (!vc->vcore_running) {
765 kvm_run->exit_reason = KVM_EXIT_INTR;
766 vcpu->arch.ret = -EINTR;
767 break;
768 }
769 /* have to wait for vcore to stop executing guest */
770 wait_state = TASK_UNINTERRUPTIBLE;
771 smp_send_reschedule(vc->pcpu);
772 }
773
774 if (!vc->vcore_running &&
775 vc->n_runnable + vc->n_blocked == vc->num_threads) {
776 /* we can run now */
777 if (kvmppc_run_core(vc))
778 continue;
779 }
780
781 if (vc->vcore_running == 1 && VCORE_EXIT_COUNT(vc) == 0)
782 kvmppc_start_thread(vcpu);
783
784 /* wait for other threads to come in, or wait for vcore */
785 prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state);
786 spin_unlock(&vc->lock);
787 schedule();
788 finish_wait(&vcpu->arch.cpu_run, &wait);
789 spin_lock(&vc->lock);
790 }
791
792 if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE)
793 kvmppc_remove_runnable(vc, vcpu);
794 spin_unlock(&vc->lock);
795
796 return vcpu->arch.ret;
de56a948
PM		 797}
798
a8606e20
PM		 799int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu)
800{
801 int r;
802
803 do {
804 r = kvmppc_run_vcpu(run, vcpu);
805
806 if (run->exit_reason == KVM_EXIT_PAPR_HCALL &&
807 !(vcpu->arch.shregs.msr & MSR_PR)) {
808 r = kvmppc_pseries_do_hcall(vcpu);
809 kvmppc_core_deliver_interrupts(vcpu);
810 }
811 } while (r == RESUME_GUEST);
812 return r;
813}
814
54738c09
DG		 815static long kvmppc_stt_npages(unsigned long window_size)
816{
817 return ALIGN((window_size >> SPAPR_TCE_SHIFT)
818 * sizeof(u64), PAGE_SIZE) / PAGE_SIZE;
819}
820
821static void release_spapr_tce_table(struct kvmppc_spapr_tce_table *stt)
822{
823 struct kvm *kvm = stt->kvm;
824 int i;
825
826 mutex_lock(&kvm->lock);
827 list_del(&stt->list);
828 for (i = 0; i < kvmppc_stt_npages(stt->window_size); i++)
829 __free_page(stt->pages[i]);
830 kfree(stt);
831 mutex_unlock(&kvm->lock);
832
833 kvm_put_kvm(kvm);
834}
835
836static int kvm_spapr_tce_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
837{
838 struct kvmppc_spapr_tce_table *stt = vma->vm_file->private_data;
839 struct page *page;
840
841 if (vmf->pgoff >= kvmppc_stt_npages(stt->window_size))
842 return VM_FAULT_SIGBUS;
843
844 page = stt->pages[vmf->pgoff];
845 get_page(page);
846 vmf->page = page;
847 return 0;
848}
849
850static const struct vm_operations_struct kvm_spapr_tce_vm_ops = {
851 .fault = kvm_spapr_tce_fault,
852};
853
854static int kvm_spapr_tce_mmap(struct file *file, struct vm_area_struct *vma)
855{
856 vma->vm_ops = &kvm_spapr_tce_vm_ops;
857 return 0;
858}
859
860static int kvm_spapr_tce_release(struct inode *inode, struct file *filp)
861{
862 struct kvmppc_spapr_tce_table *stt = filp->private_data;
863
864 release_spapr_tce_table(stt);
865 return 0;
866}
867
868static struct file_operations kvm_spapr_tce_fops = {
869 .mmap = kvm_spapr_tce_mmap,
870 .release = kvm_spapr_tce_release,
871};
872
873long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
874 struct kvm_create_spapr_tce *args)
875{
876 struct kvmppc_spapr_tce_table *stt = NULL;
877 long npages;
878 int ret = -ENOMEM;
879 int i;
880
881 /* Check this LIOBN hasn't been previously allocated */
882 list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) {
883 if (stt->liobn == args->liobn)
884 return -EBUSY;
885 }
886
887 npages = kvmppc_stt_npages(args->window_size);
888
889 stt = kzalloc(sizeof(*stt) + npages* sizeof(struct page *),
890 GFP_KERNEL);
891 if (!stt)
892 goto fail;
893
894 stt->liobn = args->liobn;
895 stt->window_size = args->window_size;
896 stt->kvm = kvm;
897
898 for (i = 0; i < npages; i++) {
899 stt->pages[i] = alloc_page(GFP_KERNEL | __GFP_ZERO);
900 if (!stt->pages[i])
901 goto fail;
902 }
903
904 kvm_get_kvm(kvm);
905
906 mutex_lock(&kvm->lock);
907 list_add(&stt->list, &kvm->arch.spapr_tce_tables);
908
909 mutex_unlock(&kvm->lock);
910
911 return anon_inode_getfd("kvm-spapr-tce", &kvm_spapr_tce_fops,
912 stt, O_RDWR);
913
914fail:
915 if (stt) {
916 for (i = 0; i < npages; i++)
917 if (stt->pages[i])
918 __free_page(stt->pages[i]);
919
920 kfree(stt);
921 }
922 return ret;
923}
924
aa04b4cc 925/* Work out RMLS (real mode limit selector) field value for a given RMA size.
9e368f29 926 Assumes POWER7 or PPC970. */
aa04b4cc
PM		 927static inline int lpcr_rmls(unsigned long rma_size)
928{
929 switch (rma_size) {
930 case 32ul << 20: /* 32 MB */
9e368f29
PM		 931 if (cpu_has_feature(CPU_FTR_ARCH_206))
932 return 8; /* only supported on POWER7 */
933 return -1;
aa04b4cc
PM		 934 case 64ul << 20: /* 64 MB */
935 return 3;
936 case 128ul << 20: /* 128 MB */
937 return 7;
938 case 256ul << 20: /* 256 MB */
939 return 4;
940 case 1ul << 30: /* 1 GB */
941 return 2;
942 case 16ul << 30: /* 16 GB */
943 return 1;
944 case 256ul << 30: /* 256 GB */
945 return 0;
946 default:
947 return -1;
948 }
949}
950
951static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
952{
953 struct kvmppc_rma_info *ri = vma->vm_file->private_data;
954 struct page *page;
955
956 if (vmf->pgoff >= ri->npages)
957 return VM_FAULT_SIGBUS;
958
959 page = pfn_to_page(ri->base_pfn + vmf->pgoff);
960 get_page(page);
961 vmf->page = page;
962 return 0;
963}
964
965static const struct vm_operations_struct kvm_rma_vm_ops = {
966 .fault = kvm_rma_fault,
967};
968
969static int kvm_rma_mmap(struct file *file, struct vm_area_struct *vma)
970{
971 vma->vm_flags |= VM_RESERVED;
972 vma->vm_ops = &kvm_rma_vm_ops;
973 return 0;
974}
975
976static int kvm_rma_release(struct inode *inode, struct file *filp)
977{
978 struct kvmppc_rma_info *ri = filp->private_data;
979
980 kvm_release_rma(ri);
981 return 0;
982}
983
984static struct file_operations kvm_rma_fops = {
985 .mmap = kvm_rma_mmap,
986 .release = kvm_rma_release,
987};
988
989long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret)
990{
991 struct kvmppc_rma_info *ri;
992 long fd;
993
994 ri = kvm_alloc_rma();
995 if (!ri)
996 return -ENOMEM;
997
998 fd = anon_inode_getfd("kvm-rma", &kvm_rma_fops, ri, O_RDWR);
999 if (fd < 0)
1000 kvm_release_rma(ri);
1001
1002 ret->rma_size = ri->npages << PAGE_SHIFT;
1003 return fd;
1004}
1005
1006static struct page *hva_to_page(unsigned long addr)
1007{
1008 struct page *page[1];
1009 int npages;
1010
1011 might_sleep();
1012
1013 npages = get_user_pages_fast(addr, 1, 1, page);
1014
1015 if (unlikely(npages != 1))
1016 return 0;
1017
1018 return page[0];
1019}
1020
de56a948
PM		 1021int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1022 struct kvm_userspace_memory_region *mem)
1023{
aa04b4cc
PM		 1024 unsigned long psize, porder;
1025 unsigned long i, npages, totalpages;
1026 unsigned long pg_ix;
1027 struct kvmppc_pginfo *pginfo;
1028 unsigned long hva;
1029 struct kvmppc_rma_info *ri = NULL;
1030 struct page *page;
1031
1032 /* For now, only allow 16MB pages */
1033 porder = LARGE_PAGE_ORDER;
1034 psize = 1ul << porder;
1035 if ((mem->memory_size & (psize - 1)) ||
1036 (mem->guest_phys_addr & (psize - 1))) {
1037 pr_err("bad memory_size=%llx @ %llx\n",
1038 mem->memory_size, mem->guest_phys_addr);
1039 return -EINVAL;
1040 }
1041
1042 npages = mem->memory_size >> porder;
1043 totalpages = (mem->guest_phys_addr + mem->memory_size) >> porder;
1044
1045 /* More memory than we have space to track? */
1046 if (totalpages > (1ul << (MAX_MEM_ORDER - LARGE_PAGE_ORDER)))
1047 return -EINVAL;
1048
1049 /* Do we already have an RMA registered? */
1050 if (mem->guest_phys_addr == 0 && kvm->arch.rma)
1051 return -EINVAL;
1052
1053 if (totalpages > kvm->arch.ram_npages)
1054 kvm->arch.ram_npages = totalpages;
1055
1056 /* Is this one of our preallocated RMAs? */
1057 if (mem->guest_phys_addr == 0) {
1058 struct vm_area_struct *vma;
1059
1060 down_read(&current->mm->mmap_sem);
1061 vma = find_vma(current->mm, mem->userspace_addr);
1062 if (vma && vma->vm_file &&
1063 vma->vm_file->f_op == &kvm_rma_fops &&
1064 mem->userspace_addr == vma->vm_start)
1065 ri = vma->vm_file->private_data;
1066 up_read(&current->mm->mmap_sem);
9e368f29
PM		 1067 if (!ri && cpu_has_feature(CPU_FTR_ARCH_201)) {
1068 pr_err("CPU requires an RMO\n");
1069 return -EINVAL;
1070 }
aa04b4cc
PM		 1071 }
1072
1073 if (ri) {
1074 unsigned long rma_size;
1075 unsigned long lpcr;
1076 long rmls;
1077
1078 rma_size = ri->npages << PAGE_SHIFT;
1079 if (rma_size > mem->memory_size)
1080 rma_size = mem->memory_size;
1081 rmls = lpcr_rmls(rma_size);
1082 if (rmls < 0) {
1083 pr_err("Can't use RMA of 0x%lx bytes\n", rma_size);
1084 return -EINVAL;
1085 }
1086 atomic_inc(&ri->use_count);
1087 kvm->arch.rma = ri;
1088 kvm->arch.n_rma_pages = rma_size >> porder;
9e368f29
PM		 1089
1090 /* Update LPCR and RMOR */
1091 lpcr = kvm->arch.lpcr;
1092 if (cpu_has_feature(CPU_FTR_ARCH_201)) {
1093 /* PPC970; insert RMLS value (split field) in HID4 */
1094 lpcr &= ~((1ul << HID4_RMLS0_SH) |
1095 (3ul << HID4_RMLS2_SH));
1096 lpcr |= ((rmls >> 2) << HID4_RMLS0_SH) |
1097 ((rmls & 3) << HID4_RMLS2_SH);
1098 /* RMOR is also in HID4 */
1099 lpcr |= ((ri->base_pfn >> (26 - PAGE_SHIFT)) & 0xffff)
1100 << HID4_RMOR_SH;
1101 } else {
1102 /* POWER7 */
1103 lpcr &= ~(LPCR_VPM0 | LPCR_VRMA_L);
1104 lpcr |= rmls << LPCR_RMLS_SH;
1105 kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT;
1106 }
aa04b4cc 1107 kvm->arch.lpcr = lpcr;
aa04b4cc
PM		 1108 pr_info("Using RMO at %lx size %lx (LPCR = %lx)\n",
1109 ri->base_pfn << PAGE_SHIFT, rma_size, lpcr);
1110 }
1111
1112 pg_ix = mem->guest_phys_addr >> porder;
1113 pginfo = kvm->arch.ram_pginfo + pg_ix;
1114 for (i = 0; i < npages; ++i, ++pg_ix) {
1115 if (ri && pg_ix < kvm->arch.n_rma_pages) {
1116 pginfo[i].pfn = ri->base_pfn +
1117 (pg_ix << (porder - PAGE_SHIFT));
1118 continue;
1119 }
1120 hva = mem->userspace_addr + (i << porder);
1121 page = hva_to_page(hva);
1122 if (!page) {
1123 pr_err("oops, no pfn for hva %lx\n", hva);
1124 goto err;
1125 }
1126 /* Check it's a 16MB page */
1127 if (!PageHead(page) ||
1128 compound_order(page) != (LARGE_PAGE_ORDER - PAGE_SHIFT)) {
1129 pr_err("page at %lx isn't 16MB (o=%d)\n",
1130 hva, compound_order(page));
1131 goto err;
1132 }
1133 pginfo[i].pfn = page_to_pfn(page);
1134 }
1135
de56a948 1136 return 0;
aa04b4cc
PM		 1137
1138 err:
1139 return -EINVAL;
de56a948
PM		 1140}
1141
1142void kvmppc_core_commit_memory_region(struct kvm *kvm,
1143 struct kvm_userspace_memory_region *mem)
1144{
aa04b4cc
PM		 1145 if (mem->guest_phys_addr == 0 && mem->memory_size != 0 &&
1146 !kvm->arch.rma)
de56a948
PM		 1147 kvmppc_map_vrma(kvm, mem);
1148}
1149
1150int kvmppc_core_init_vm(struct kvm *kvm)
1151{
1152 long r;
aa04b4cc
PM		 1153 unsigned long npages = 1ul << (MAX_MEM_ORDER - LARGE_PAGE_ORDER);
1154 long err = -ENOMEM;
1155 unsigned long lpcr;
de56a948
PM		 1156
1157 /* Allocate hashed page table */
1158 r = kvmppc_alloc_hpt(kvm);
54738c09
DG		 1159 if (r)
1160 return r;
de56a948 1161
54738c09 1162 INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
aa04b4cc
PM		 1163
1164 kvm->arch.ram_pginfo = kzalloc(npages * sizeof(struct kvmppc_pginfo),
1165 GFP_KERNEL);
1166 if (!kvm->arch.ram_pginfo) {
1167 pr_err("kvmppc_core_init_vm: couldn't alloc %lu bytes\n",
1168 npages * sizeof(struct kvmppc_pginfo));
1169 goto out_free;
1170 }
1171
1172 kvm->arch.ram_npages = 0;
1173 kvm->arch.ram_psize = 1ul << LARGE_PAGE_ORDER;
1174 kvm->arch.ram_porder = LARGE_PAGE_ORDER;
1175 kvm->arch.rma = NULL;
1176 kvm->arch.n_rma_pages = 0;
1177
9e368f29 1178 kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
aa04b4cc 1179
9e368f29
PM		 1180 if (cpu_has_feature(CPU_FTR_ARCH_201)) {
1181 /* PPC970; HID4 is effectively the LPCR */
1182 unsigned long lpid = kvm->arch.lpid;
1183 kvm->arch.host_lpid = 0;
1184 kvm->arch.host_lpcr = lpcr = mfspr(SPRN_HID4);
1185 lpcr &= ~((3 << HID4_LPID1_SH) | (0xful << HID4_LPID5_SH));
1186 lpcr |= ((lpid >> 4) << HID4_LPID1_SH) |
1187 ((lpid & 0xf) << HID4_LPID5_SH);
1188 } else {
1189 /* POWER7; init LPCR for virtual RMA mode */
1190 kvm->arch.host_lpid = mfspr(SPRN_LPID);
1191 kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR);
1192 lpcr &= LPCR_PECE | LPCR_LPES;
1193 lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE |
1194 LPCR_VPM0 | LPCR_VRMA_L;
1195 }
1196 kvm->arch.lpcr = lpcr;
aa04b4cc 1197
54738c09 1198 return 0;
aa04b4cc
PM		 1199
1200 out_free:
1201 kvmppc_free_hpt(kvm);
1202 return err;
de56a948
PM		 1203}
1204
1205void kvmppc_core_destroy_vm(struct kvm *kvm)
1206{
aa04b4cc
PM		 1207 struct kvmppc_pginfo *pginfo;
1208 unsigned long i;
1209
1210 if (kvm->arch.ram_pginfo) {
1211 pginfo = kvm->arch.ram_pginfo;
1212 kvm->arch.ram_pginfo = NULL;
1213 for (i = kvm->arch.n_rma_pages; i < kvm->arch.ram_npages; ++i)
1214 if (pginfo[i].pfn)
1215 put_page(pfn_to_page(pginfo[i].pfn));
1216 kfree(pginfo);
1217 }
1218 if (kvm->arch.rma) {
1219 kvm_release_rma(kvm->arch.rma);
1220 kvm->arch.rma = NULL;
1221 }
1222
de56a948 1223 kvmppc_free_hpt(kvm);
54738c09 1224 WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
de56a948
PM		 1225}
1226
1227/* These are stubs for now */
1228void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
1229{
1230}
1231
1232/* We don't need to emulate any privileged instructions or dcbz */
1233int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
1234 unsigned int inst, int *advance)
1235{
1236 return EMULATE_FAIL;
1237}
1238
1239int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
1240{
1241 return EMULATE_FAIL;
1242}
1243
1244int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
1245{
1246 return EMULATE_FAIL;
1247}
1248
1249static int kvmppc_book3s_hv_init(void)
1250{
1251 int r;
1252
1253 r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
1254
1255 if (r)
1256 return r;
1257
1258 r = kvmppc_mmu_hv_init();
1259
1260 return r;
1261}
1262
1263static void kvmppc_book3s_hv_exit(void)
1264{
1265 kvm_exit();
1266}
1267
1268module_init(kvmppc_book3s_hv_init);
1269module_exit(kvmppc_book3s_hv_exit);
kernel source for telekom puls (alcatel/mediatek)