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KVM: PPC: Only get pages when actually needed, not in prepare_memory_region()
[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>
66b15db6 27#include <linux/export.h>
de56a948
PM		 28#include <linux/fs.h>
29#include <linux/anon_inodes.h>
30#include <linux/cpumask.h>
aa04b4cc
PM		 31#include <linux/spinlock.h>
32#include <linux/page-flags.h>
de56a948
PM		 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>
371fefd6 45#include <asm/cputhreads.h>
aa04b4cc 46#include <asm/page.h>
de1d9248 47#include <asm/hvcall.h>
de56a948
PM		 48#include <linux/gfp.h>
49#include <linux/sched.h>
50#include <linux/vmalloc.h>
51#include <linux/highmem.h>
c77162de 52#include <linux/hugetlb.h>
de56a948 53
aa04b4cc
PM		 54#define LARGE_PAGE_ORDER 24 /* 16MB pages */
55
de56a948
PM		 56/* #define EXIT_DEBUG */
57/* #define EXIT_DEBUG_SIMPLE */
58/* #define EXIT_DEBUG_INT */
59
19ccb76a 60static void kvmppc_end_cede(struct kvm_vcpu *vcpu);
c77162de 61static int kvmppc_hv_setup_rma(struct kvm_vcpu *vcpu);
19ccb76a 62
de56a948
PM		 63void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
64{
65 local_paca->kvm_hstate.kvm_vcpu = vcpu;
371fefd6 66 local_paca->kvm_hstate.kvm_vcore = vcpu->arch.vcore;
de56a948
PM		 67}
68
69void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
70{
71}
72
de56a948
PM		 73void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
74{
75 vcpu->arch.shregs.msr = msr;
19ccb76a 76 kvmppc_end_cede(vcpu);
de56a948
PM		 77}
78
79void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
80{
81 vcpu->arch.pvr = pvr;
82}
83
84void kvmppc_dump_regs(struct kvm_vcpu *vcpu)
85{
86 int r;
87
88 pr_err("vcpu %p (%d):\n", vcpu, vcpu->vcpu_id);
89 pr_err("pc = %.16lx msr = %.16llx trap = %x\n",
90 vcpu->arch.pc, vcpu->arch.shregs.msr, vcpu->arch.trap);
91 for (r = 0; r < 16; ++r)
92 pr_err("r%2d = %.16lx r%d = %.16lx\n",
93 r, kvmppc_get_gpr(vcpu, r),
94 r+16, kvmppc_get_gpr(vcpu, r+16));
95 pr_err("ctr = %.16lx lr = %.16lx\n",
96 vcpu->arch.ctr, vcpu->arch.lr);
97 pr_err("srr0 = %.16llx srr1 = %.16llx\n",
98 vcpu->arch.shregs.srr0, vcpu->arch.shregs.srr1);
99 pr_err("sprg0 = %.16llx sprg1 = %.16llx\n",
100 vcpu->arch.shregs.sprg0, vcpu->arch.shregs.sprg1);
101 pr_err("sprg2 = %.16llx sprg3 = %.16llx\n",
102 vcpu->arch.shregs.sprg2, vcpu->arch.shregs.sprg3);
103 pr_err("cr = %.8x xer = %.16lx dsisr = %.8x\n",
104 vcpu->arch.cr, vcpu->arch.xer, vcpu->arch.shregs.dsisr);
105 pr_err("dar = %.16llx\n", vcpu->arch.shregs.dar);
106 pr_err("fault dar = %.16lx dsisr = %.8x\n",
107 vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
108 pr_err("SLB (%d entries):\n", vcpu->arch.slb_max);
109 for (r = 0; r < vcpu->arch.slb_max; ++r)
110 pr_err(" ESID = %.16llx VSID = %.16llx\n",
111 vcpu->arch.slb[r].orige, vcpu->arch.slb[r].origv);
112 pr_err("lpcr = %.16lx sdr1 = %.16lx last_inst = %.8x\n",
aa04b4cc 113 vcpu->kvm->arch.lpcr, vcpu->kvm->arch.sdr1,
de56a948
PM		 114 vcpu->arch.last_inst);
115}
116
a8606e20
PM		 117struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id)
118{
119 int r;
120 struct kvm_vcpu *v, *ret = NULL;
121
122 mutex_lock(&kvm->lock);
123 kvm_for_each_vcpu(r, v, kvm) {
124 if (v->vcpu_id == id) {
125 ret = v;
126 break;
127 }
128 }
129 mutex_unlock(&kvm->lock);
130 return ret;
131}
132
133static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa)
134{
135 vpa->shared_proc = 1;
136 vpa->yield_count = 1;
137}
138
139static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu,
140 unsigned long flags,
141 unsigned long vcpuid, unsigned long vpa)
142{
143 struct kvm *kvm = vcpu->kvm;
93e60249 144 unsigned long len, nb;
a8606e20
PM		 145 void *va;
146 struct kvm_vcpu *tvcpu;
93e60249 147 int err = H_PARAMETER;
a8606e20
PM		 148
149 tvcpu = kvmppc_find_vcpu(kvm, vcpuid);
150 if (!tvcpu)
151 return H_PARAMETER;
152
153 flags >>= 63 - 18;
154 flags &= 7;
155 if (flags == 0 || flags == 4)
156 return H_PARAMETER;
157 if (flags < 4) {
158 if (vpa & 0x7f)
159 return H_PARAMETER;
93e60249
PM		 160 if (flags >= 2 && !tvcpu->arch.vpa)
161 return H_RESOURCE;
a8606e20 162 /* registering new area; convert logical addr to real */
93e60249
PM		 163 va = kvmppc_pin_guest_page(kvm, vpa, &nb);
164 if (va == NULL)
b2b2f165 165 return H_PARAMETER;
a8606e20
PM		 166 if (flags <= 1)
167 len = *(unsigned short *)(va + 4);
168 else
169 len = *(unsigned int *)(va + 4);
93e60249
PM		 170 if (len > nb)
171 goto out_unpin;
a8606e20
PM		 172 switch (flags) {
173 case 1: /* register VPA */
174 if (len < 640)
93e60249
PM		 175 goto out_unpin;
176 if (tvcpu->arch.vpa)
177 kvmppc_unpin_guest_page(kvm, vcpu->arch.vpa);
a8606e20
PM		 178 tvcpu->arch.vpa = va;
179 init_vpa(vcpu, va);
180 break;
181 case 2: /* register DTL */
182 if (len < 48)
93e60249 183 goto out_unpin;
a8606e20 184 len -= len % 48;
93e60249
PM		 185 if (tvcpu->arch.dtl)
186 kvmppc_unpin_guest_page(kvm, vcpu->arch.dtl);
a8606e20
PM		 187 tvcpu->arch.dtl = va;
188 tvcpu->arch.dtl_end = va + len;
189 break;
190 case 3: /* register SLB shadow buffer */
93e60249
PM		 191 if (len < 16)
192 goto out_unpin;
193 if (tvcpu->arch.slb_shadow)
194 kvmppc_unpin_guest_page(kvm, vcpu->arch.slb_shadow);
a8606e20
PM		 195 tvcpu->arch.slb_shadow = va;
196 break;
197 }
198 } else {
199 switch (flags) {
200 case 5: /* unregister VPA */
201 if (tvcpu->arch.slb_shadow || tvcpu->arch.dtl)
202 return H_RESOURCE;
93e60249
PM		 203 if (!tvcpu->arch.vpa)
204 break;
205 kvmppc_unpin_guest_page(kvm, tvcpu->arch.vpa);
a8606e20
PM		 206 tvcpu->arch.vpa = NULL;
207 break;
208 case 6: /* unregister DTL */
93e60249
PM		 209 if (!tvcpu->arch.dtl)
210 break;
211 kvmppc_unpin_guest_page(kvm, tvcpu->arch.dtl);
a8606e20
PM		 212 tvcpu->arch.dtl = NULL;
213 break;
214 case 7: /* unregister SLB shadow buffer */
93e60249
PM		 215 if (!tvcpu->arch.slb_shadow)
216 break;
217 kvmppc_unpin_guest_page(kvm, tvcpu->arch.slb_shadow);
a8606e20
PM		 218 tvcpu->arch.slb_shadow = NULL;
219 break;
220 }
221 }
222 return H_SUCCESS;
93e60249
PM		 223
224 out_unpin:
225 kvmppc_unpin_guest_page(kvm, va);
226 return err;
a8606e20
PM		 227}
228
229int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
230{
231 unsigned long req = kvmppc_get_gpr(vcpu, 3);
232 unsigned long target, ret = H_SUCCESS;
233 struct kvm_vcpu *tvcpu;
234
235 switch (req) {
c77162de
PM		 236 case H_ENTER:
237 ret = kvmppc_virtmode_h_enter(vcpu, kvmppc_get_gpr(vcpu, 4),
238 kvmppc_get_gpr(vcpu, 5),
239 kvmppc_get_gpr(vcpu, 6),
240 kvmppc_get_gpr(vcpu, 7));
241 break;
a8606e20 242 case H_CEDE:
a8606e20
PM		 243 break;
244 case H_PROD:
245 target = kvmppc_get_gpr(vcpu, 4);
246 tvcpu = kvmppc_find_vcpu(vcpu->kvm, target);
247 if (!tvcpu) {
248 ret = H_PARAMETER;
249 break;
250 }
251 tvcpu->arch.prodded = 1;
252 smp_mb();
253 if (vcpu->arch.ceded) {
254 if (waitqueue_active(&vcpu->wq)) {
255 wake_up_interruptible(&vcpu->wq);
256 vcpu->stat.halt_wakeup++;
257 }
258 }
259 break;
260 case H_CONFER:
261 break;
262 case H_REGISTER_VPA:
263 ret = do_h_register_vpa(vcpu, kvmppc_get_gpr(vcpu, 4),
264 kvmppc_get_gpr(vcpu, 5),
265 kvmppc_get_gpr(vcpu, 6));
266 break;
267 default:
268 return RESUME_HOST;
269 }
270 kvmppc_set_gpr(vcpu, 3, ret);
271 vcpu->arch.hcall_needed = 0;
272 return RESUME_GUEST;
273}
274
de56a948
PM		 275static int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
276 struct task_struct *tsk)
277{
278 int r = RESUME_HOST;
279
280 vcpu->stat.sum_exits++;
281
282 run->exit_reason = KVM_EXIT_UNKNOWN;
283 run->ready_for_interrupt_injection = 1;
284 switch (vcpu->arch.trap) {
285 /* We're good on these - the host merely wanted to get our attention */
286 case BOOK3S_INTERRUPT_HV_DECREMENTER:
287 vcpu->stat.dec_exits++;
288 r = RESUME_GUEST;
289 break;
290 case BOOK3S_INTERRUPT_EXTERNAL:
291 vcpu->stat.ext_intr_exits++;
292 r = RESUME_GUEST;
293 break;
294 case BOOK3S_INTERRUPT_PERFMON:
295 r = RESUME_GUEST;
296 break;
297 case BOOK3S_INTERRUPT_PROGRAM:
298 {
299 ulong flags;
300 /*
301 * Normally program interrupts are delivered directly
302 * to the guest by the hardware, but we can get here
303 * as a result of a hypervisor emulation interrupt
304 * (e40) getting turned into a 700 by BML RTAS.
305 */
306 flags = vcpu->arch.shregs.msr & 0x1f0000ull;
307 kvmppc_core_queue_program(vcpu, flags);
308 r = RESUME_GUEST;
309 break;
310 }
311 case BOOK3S_INTERRUPT_SYSCALL:
312 {
313 /* hcall - punt to userspace */
314 int i;
315
316 if (vcpu->arch.shregs.msr & MSR_PR) {
317 /* sc 1 from userspace - reflect to guest syscall */
318 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_SYSCALL);
319 r = RESUME_GUEST;
320 break;
321 }
322 run->papr_hcall.nr = kvmppc_get_gpr(vcpu, 3);
323 for (i = 0; i < 9; ++i)
324 run->papr_hcall.args[i] = kvmppc_get_gpr(vcpu, 4 + i);
325 run->exit_reason = KVM_EXIT_PAPR_HCALL;
326 vcpu->arch.hcall_needed = 1;
327 r = RESUME_HOST;
328 break;
329 }
330 /*
331 * We get these next two if the guest does a bad real-mode access,
332 * as we have enabled VRMA (virtualized real mode area) mode in the
333 * LPCR. We just generate an appropriate DSI/ISI to the guest.
334 */
335 case BOOK3S_INTERRUPT_H_DATA_STORAGE:
336 vcpu->arch.shregs.dsisr = vcpu->arch.fault_dsisr;
337 vcpu->arch.shregs.dar = vcpu->arch.fault_dar;
338 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0);
339 r = RESUME_GUEST;
340 break;
341 case BOOK3S_INTERRUPT_H_INST_STORAGE:
342 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE,
343 0x08000000);
344 r = RESUME_GUEST;
345 break;
346 /*
347 * This occurs if the guest executes an illegal instruction.
348 * We just generate a program interrupt to the guest, since
349 * we don't emulate any guest instructions at this stage.
350 */
351 case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
352 kvmppc_core_queue_program(vcpu, 0x80000);
353 r = RESUME_GUEST;
354 break;
355 default:
356 kvmppc_dump_regs(vcpu);
357 printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
358 vcpu->arch.trap, kvmppc_get_pc(vcpu),
359 vcpu->arch.shregs.msr);
360 r = RESUME_HOST;
361 BUG();
362 break;
363 }
364
de56a948
PM		 365 return r;
366}
367
368int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
369 struct kvm_sregs *sregs)
370{
371 int i;
372
373 sregs->pvr = vcpu->arch.pvr;
374
375 memset(sregs, 0, sizeof(struct kvm_sregs));
376 for (i = 0; i < vcpu->arch.slb_max; i++) {
377 sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige;
378 sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
379 }
380
381 return 0;
382}
383
384int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
385 struct kvm_sregs *sregs)
386{
387 int i, j;
388
389 kvmppc_set_pvr(vcpu, sregs->pvr);
390
391 j = 0;
392 for (i = 0; i < vcpu->arch.slb_nr; i++) {
393 if (sregs->u.s.ppc64.slb[i].slbe & SLB_ESID_V) {
394 vcpu->arch.slb[j].orige = sregs->u.s.ppc64.slb[i].slbe;
395 vcpu->arch.slb[j].origv = sregs->u.s.ppc64.slb[i].slbv;
396 ++j;
397 }
398 }
399 vcpu->arch.slb_max = j;
400
401 return 0;
402}
403
404int kvmppc_core_check_processor_compat(void)
405{
9e368f29 406 if (cpu_has_feature(CPU_FTR_HVMODE))
de56a948
PM		 407 return 0;
408 return -EIO;
409}
410
411struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
412{
413 struct kvm_vcpu *vcpu;
371fefd6
PM		 414 int err = -EINVAL;
415 int core;
416 struct kvmppc_vcore *vcore;
de56a948 417
371fefd6
PM		 418 core = id / threads_per_core;
419 if (core >= KVM_MAX_VCORES)
420 goto out;
421
422 err = -ENOMEM;
de56a948
PM		 423 vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL);
424 if (!vcpu)
425 goto out;
426
427 err = kvm_vcpu_init(vcpu, kvm, id);
428 if (err)
429 goto free_vcpu;
430
431 vcpu->arch.shared = &vcpu->arch.shregs;
432 vcpu->arch.last_cpu = -1;
433 vcpu->arch.mmcr[0] = MMCR0_FC;
434 vcpu->arch.ctrl = CTRL_RUNLATCH;
435 /* default to host PVR, since we can't spoof it */
436 vcpu->arch.pvr = mfspr(SPRN_PVR);
437 kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
438
de56a948
PM		 439 kvmppc_mmu_book3s_hv_init(vcpu);
440
371fefd6 441 /*
19ccb76a 442 * We consider the vcpu stopped until we see the first run ioctl for it.
371fefd6 443 */
19ccb76a 444 vcpu->arch.state = KVMPPC_VCPU_STOPPED;
371fefd6
PM		 445
446 init_waitqueue_head(&vcpu->arch.cpu_run);
447
448 mutex_lock(&kvm->lock);
449 vcore = kvm->arch.vcores[core];
450 if (!vcore) {
451 vcore = kzalloc(sizeof(struct kvmppc_vcore), GFP_KERNEL);
452 if (vcore) {
453 INIT_LIST_HEAD(&vcore->runnable_threads);
454 spin_lock_init(&vcore->lock);
19ccb76a 455 init_waitqueue_head(&vcore->wq);
371fefd6
PM		 456 }
457 kvm->arch.vcores[core] = vcore;
458 }
459 mutex_unlock(&kvm->lock);
460
461 if (!vcore)
462 goto free_vcpu;
463
464 spin_lock(&vcore->lock);
465 ++vcore->num_threads;
371fefd6
PM		 466 spin_unlock(&vcore->lock);
467 vcpu->arch.vcore = vcore;
468
af8f38b3
AG		 469 vcpu->arch.cpu_type = KVM_CPU_3S_64;
470 kvmppc_sanity_check(vcpu);
471
de56a948
PM		 472 return vcpu;
473
474free_vcpu:
475 kfree(vcpu);
476out:
477 return ERR_PTR(err);
478}
479
480void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
481{
93e60249
PM		 482 if (vcpu->arch.dtl)
483 kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.dtl);
484 if (vcpu->arch.slb_shadow)
485 kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.slb_shadow);
486 if (vcpu->arch.vpa)
487 kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.vpa);
de56a948
PM		 488 kvm_vcpu_uninit(vcpu);
489 kfree(vcpu);
490}
491
19ccb76a 492static void kvmppc_set_timer(struct kvm_vcpu *vcpu)
371fefd6 493{
19ccb76a 494 unsigned long dec_nsec, now;
371fefd6 495
19ccb76a
PM		 496 now = get_tb();
497 if (now > vcpu->arch.dec_expires) {
498 /* decrementer has already gone negative */
499 kvmppc_core_queue_dec(vcpu);
7e28e60e 500 kvmppc_core_prepare_to_enter(vcpu);
19ccb76a 501 return;
371fefd6 502 }
19ccb76a
PM		 503 dec_nsec = (vcpu->arch.dec_expires - now) * NSEC_PER_SEC
504 / tb_ticks_per_sec;
505 hrtimer_start(&vcpu->arch.dec_timer, ktime_set(0, dec_nsec),
506 HRTIMER_MODE_REL);
507 vcpu->arch.timer_running = 1;
371fefd6
PM		 508}
509
19ccb76a 510static void kvmppc_end_cede(struct kvm_vcpu *vcpu)
371fefd6 511{
19ccb76a
PM		 512 vcpu->arch.ceded = 0;
513 if (vcpu->arch.timer_running) {
514 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
515 vcpu->arch.timer_running = 0;
516 }
371fefd6
PM		 517}
518
de56a948 519extern int __kvmppc_vcore_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
371fefd6 520extern void xics_wake_cpu(int cpu);
de56a948 521
371fefd6
PM		 522static void kvmppc_remove_runnable(struct kvmppc_vcore *vc,
523 struct kvm_vcpu *vcpu)
de56a948 524{
371fefd6 525 struct kvm_vcpu *v;
de56a948 526
371fefd6
PM		 527 if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
528 return;
529 vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
530 --vc->n_runnable;
19ccb76a 531 ++vc->n_busy;
371fefd6
PM		 532 /* decrement the physical thread id of each following vcpu */
533 v = vcpu;
534 list_for_each_entry_continue(v, &vc->runnable_threads, arch.run_list)
535 --v->arch.ptid;
536 list_del(&vcpu->arch.run_list);
537}
538
539static void kvmppc_start_thread(struct kvm_vcpu *vcpu)
540{
541 int cpu;
542 struct paca_struct *tpaca;
543 struct kvmppc_vcore *vc = vcpu->arch.vcore;
544
19ccb76a
PM		 545 if (vcpu->arch.timer_running) {
546 hrtimer_try_to_cancel(&vcpu->arch.dec_timer);
547 vcpu->arch.timer_running = 0;
548 }
371fefd6
PM		 549 cpu = vc->pcpu + vcpu->arch.ptid;
550 tpaca = &paca[cpu];
551 tpaca->kvm_hstate.kvm_vcpu = vcpu;
552 tpaca->kvm_hstate.kvm_vcore = vc;
19ccb76a
PM		 553 tpaca->kvm_hstate.napping = 0;
554 vcpu->cpu = vc->pcpu;
371fefd6 555 smp_wmb();
251da038 556#if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
371fefd6
PM		 557 if (vcpu->arch.ptid) {
558 tpaca->cpu_start = 0x80;
371fefd6
PM		 559 wmb();
560 xics_wake_cpu(cpu);
561 ++vc->n_woken;
de56a948 562 }
371fefd6
PM		 563#endif
564}
de56a948 565
371fefd6
PM		 566static void kvmppc_wait_for_nap(struct kvmppc_vcore *vc)
567{
568 int i;
569
570 HMT_low();
571 i = 0;
572 while (vc->nap_count < vc->n_woken) {
573 if (++i >= 1000000) {
574 pr_err("kvmppc_wait_for_nap timeout %d %d\n",
575 vc->nap_count, vc->n_woken);
576 break;
577 }
578 cpu_relax();
579 }
580 HMT_medium();
581}
582
583/*
584 * Check that we are on thread 0 and that any other threads in
585 * this core are off-line.
586 */
587static int on_primary_thread(void)
588{
589 int cpu = smp_processor_id();
590 int thr = cpu_thread_in_core(cpu);
591
592 if (thr)
593 return 0;
594 while (++thr < threads_per_core)
595 if (cpu_online(cpu + thr))
596 return 0;
597 return 1;
598}
599
600/*
601 * Run a set of guest threads on a physical core.
602 * Called with vc->lock held.
603 */
604static int kvmppc_run_core(struct kvmppc_vcore *vc)
605{
19ccb76a 606 struct kvm_vcpu *vcpu, *vcpu0, *vnext;
371fefd6
PM		 607 long ret;
608 u64 now;
19ccb76a 609 int ptid;
371fefd6
PM		 610
611 /* don't start if any threads have a signal pending */
612 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
613 if (signal_pending(vcpu->arch.run_task))
614 return 0;
de56a948
PM		 615
616 /*
617 * Make sure we are running on thread 0, and that
618 * secondary threads are offline.
619 * XXX we should also block attempts to bring any
620 * secondary threads online.
621 */
371fefd6
PM		 622 if (threads_per_core > 1 && !on_primary_thread()) {
623 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
624 vcpu->arch.ret = -EBUSY;
625 goto out;
de56a948
PM		 626 }
627
19ccb76a
PM		 628 /*
629 * Assign physical thread IDs, first to non-ceded vcpus
630 * and then to ceded ones.
631 */
632 ptid = 0;
633 vcpu0 = NULL;
634 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) {
635 if (!vcpu->arch.ceded) {
636 if (!ptid)
637 vcpu0 = vcpu;
638 vcpu->arch.ptid = ptid++;
639 }
640 }
641 if (!vcpu0)
642 return 0; /* nothing to run */
643 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
644 if (vcpu->arch.ceded)
645 vcpu->arch.ptid = ptid++;
646
371fefd6
PM		 647 vc->n_woken = 0;
648 vc->nap_count = 0;
649 vc->entry_exit_count = 0;
19ccb76a 650 vc->vcore_state = VCORE_RUNNING;
371fefd6
PM		 651 vc->in_guest = 0;
652 vc->pcpu = smp_processor_id();
19ccb76a 653 vc->napping_threads = 0;
371fefd6
PM		 654 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
655 kvmppc_start_thread(vcpu);
371fefd6 656
19ccb76a 657 preempt_disable();
371fefd6 658 spin_unlock(&vc->lock);
de56a948 659
371fefd6 660 kvm_guest_enter();
19ccb76a 661 __kvmppc_vcore_entry(NULL, vcpu0);
de56a948 662
371fefd6 663 spin_lock(&vc->lock);
19ccb76a
PM		 664 /* disable sending of IPIs on virtual external irqs */
665 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
666 vcpu->cpu = -1;
667 /* wait for secondary threads to finish writing their state to memory */
371fefd6
PM		 668 if (vc->nap_count < vc->n_woken)
669 kvmppc_wait_for_nap(vc);
670 /* prevent other vcpu threads from doing kvmppc_start_thread() now */
19ccb76a 671 vc->vcore_state = VCORE_EXITING;
371fefd6
PM		 672 spin_unlock(&vc->lock);
673
674 /* make sure updates to secondary vcpu structs are visible now */
675 smp_mb();
de56a948
PM		 676 kvm_guest_exit();
677
678 preempt_enable();
679 kvm_resched(vcpu);
680
681 now = get_tb();
371fefd6
PM		 682 list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) {
683 /* cancel pending dec exception if dec is positive */
684 if (now < vcpu->arch.dec_expires &&
685 kvmppc_core_pending_dec(vcpu))
686 kvmppc_core_dequeue_dec(vcpu);
19ccb76a
PM		 687
688 ret = RESUME_GUEST;
689 if (vcpu->arch.trap)
690 ret = kvmppc_handle_exit(vcpu->arch.kvm_run, vcpu,
691 vcpu->arch.run_task);
692
371fefd6
PM		 693 vcpu->arch.ret = ret;
694 vcpu->arch.trap = 0;
19ccb76a
PM		 695
696 if (vcpu->arch.ceded) {
697 if (ret != RESUME_GUEST)
698 kvmppc_end_cede(vcpu);
699 else
700 kvmppc_set_timer(vcpu);
701 }
371fefd6 702 }
de56a948 703
371fefd6 704 spin_lock(&vc->lock);
de56a948 705 out:
19ccb76a 706 vc->vcore_state = VCORE_INACTIVE;
371fefd6
PM		 707 list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads,
708 arch.run_list) {
709 if (vcpu->arch.ret != RESUME_GUEST) {
710 kvmppc_remove_runnable(vc, vcpu);
711 wake_up(&vcpu->arch.cpu_run);
712 }
713 }
714
715 return 1;
716}
717
19ccb76a
PM		 718/*
719 * Wait for some other vcpu thread to execute us, and
720 * wake us up when we need to handle something in the host.
721 */
722static void kvmppc_wait_for_exec(struct kvm_vcpu *vcpu, int wait_state)
371fefd6 723{
371fefd6
PM		 724 DEFINE_WAIT(wait);
725
19ccb76a
PM		 726 prepare_to_wait(&vcpu->arch.cpu_run, &wait, wait_state);
727 if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE)
728 schedule();
729 finish_wait(&vcpu->arch.cpu_run, &wait);
730}
731
732/*
733 * All the vcpus in this vcore are idle, so wait for a decrementer
734 * or external interrupt to one of the vcpus. vc->lock is held.
735 */
736static void kvmppc_vcore_blocked(struct kvmppc_vcore *vc)
737{
738 DEFINE_WAIT(wait);
739 struct kvm_vcpu *v;
740 int all_idle = 1;
741
742 prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE);
743 vc->vcore_state = VCORE_SLEEPING;
744 spin_unlock(&vc->lock);
745 list_for_each_entry(v, &vc->runnable_threads, arch.run_list) {
746 if (!v->arch.ceded || v->arch.pending_exceptions) {
747 all_idle = 0;
748 break;
749 }
371fefd6 750 }
19ccb76a
PM		 751 if (all_idle)
752 schedule();
753 finish_wait(&vc->wq, &wait);
754 spin_lock(&vc->lock);
755 vc->vcore_state = VCORE_INACTIVE;
756}
371fefd6 757
19ccb76a
PM		 758static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
759{
760 int n_ceded;
761 int prev_state;
762 struct kvmppc_vcore *vc;
763 struct kvm_vcpu *v, *vn;
9e368f29 764
371fefd6
PM		 765 kvm_run->exit_reason = 0;
766 vcpu->arch.ret = RESUME_GUEST;
767 vcpu->arch.trap = 0;
768
371fefd6
PM		 769 /*
770 * Synchronize with other threads in this virtual core
771 */
772 vc = vcpu->arch.vcore;
773 spin_lock(&vc->lock);
19ccb76a 774 vcpu->arch.ceded = 0;
371fefd6
PM		 775 vcpu->arch.run_task = current;
776 vcpu->arch.kvm_run = kvm_run;
19ccb76a
PM		 777 prev_state = vcpu->arch.state;
778 vcpu->arch.state = KVMPPC_VCPU_RUNNABLE;
371fefd6
PM		 779 list_add_tail(&vcpu->arch.run_list, &vc->runnable_threads);
780 ++vc->n_runnable;
781
19ccb76a
PM		 782 /*
783 * This happens the first time this is called for a vcpu.
784 * If the vcore is already running, we may be able to start
785 * this thread straight away and have it join in.
786 */
787 if (prev_state == KVMPPC_VCPU_STOPPED) {
788 if (vc->vcore_state == VCORE_RUNNING &&
789 VCORE_EXIT_COUNT(vc) == 0) {
790 vcpu->arch.ptid = vc->n_runnable - 1;
791 kvmppc_start_thread(vcpu);
371fefd6
PM		 792 }
793
19ccb76a
PM		 794 } else if (prev_state == KVMPPC_VCPU_BUSY_IN_HOST)
795 --vc->n_busy;
371fefd6 796
19ccb76a
PM		 797 while (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE &&
798 !signal_pending(current)) {
799 if (vc->n_busy || vc->vcore_state != VCORE_INACTIVE) {
800 spin_unlock(&vc->lock);
801 kvmppc_wait_for_exec(vcpu, TASK_INTERRUPTIBLE);
802 spin_lock(&vc->lock);
803 continue;
804 }
805 n_ceded = 0;
806 list_for_each_entry(v, &vc->runnable_threads, arch.run_list)
807 n_ceded += v->arch.ceded;
808 if (n_ceded == vc->n_runnable)
809 kvmppc_vcore_blocked(vc);
810 else
811 kvmppc_run_core(vc);
812
813 list_for_each_entry_safe(v, vn, &vc->runnable_threads,
814 arch.run_list) {
7e28e60e 815 kvmppc_core_prepare_to_enter(v);
19ccb76a
PM		 816 if (signal_pending(v->arch.run_task)) {
817 kvmppc_remove_runnable(vc, v);
818 v->stat.signal_exits++;
819 v->arch.kvm_run->exit_reason = KVM_EXIT_INTR;
820 v->arch.ret = -EINTR;
821 wake_up(&v->arch.cpu_run);
822 }
823 }
824 }
371fefd6 825
19ccb76a
PM		 826 if (signal_pending(current)) {
827 if (vc->vcore_state == VCORE_RUNNING ||
828 vc->vcore_state == VCORE_EXITING) {
829 spin_unlock(&vc->lock);
830 kvmppc_wait_for_exec(vcpu, TASK_UNINTERRUPTIBLE);
831 spin_lock(&vc->lock);
832 }
833 if (vcpu->arch.state == KVMPPC_VCPU_RUNNABLE) {
834 kvmppc_remove_runnable(vc, vcpu);
835 vcpu->stat.signal_exits++;
836 kvm_run->exit_reason = KVM_EXIT_INTR;
837 vcpu->arch.ret = -EINTR;
838 }
371fefd6
PM		 839 }
840
371fefd6 841 spin_unlock(&vc->lock);
371fefd6 842 return vcpu->arch.ret;
de56a948
PM		 843}
844
a8606e20
PM		 845int kvmppc_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu)
846{
847 int r;
848
af8f38b3
AG		 849 if (!vcpu->arch.sane) {
850 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
851 return -EINVAL;
852 }
853
25051b5a
SW		 854 kvmppc_core_prepare_to_enter(vcpu);
855
19ccb76a
PM		 856 /* No need to go into the guest when all we'll do is come back out */
857 if (signal_pending(current)) {
858 run->exit_reason = KVM_EXIT_INTR;
859 return -EINTR;
860 }
861
c77162de
PM		 862 /* On the first time here, set up VRMA or RMA */
863 if (!vcpu->kvm->arch.rma_setup_done) {
864 r = kvmppc_hv_setup_rma(vcpu);
865 if (r)
866 return r;
867 }
19ccb76a
PM		 868
869 flush_fp_to_thread(current);
870 flush_altivec_to_thread(current);
871 flush_vsx_to_thread(current);
872 vcpu->arch.wqp = &vcpu->arch.vcore->wq;
873
a8606e20
PM		 874 do {
875 r = kvmppc_run_vcpu(run, vcpu);
876
877 if (run->exit_reason == KVM_EXIT_PAPR_HCALL &&
878 !(vcpu->arch.shregs.msr & MSR_PR)) {
879 r = kvmppc_pseries_do_hcall(vcpu);
7e28e60e 880 kvmppc_core_prepare_to_enter(vcpu);
a8606e20
PM		 881 }
882 } while (r == RESUME_GUEST);
883 return r;
884}
885
54738c09
DG		 886static long kvmppc_stt_npages(unsigned long window_size)
887{
888 return ALIGN((window_size >> SPAPR_TCE_SHIFT)
889 * sizeof(u64), PAGE_SIZE) / PAGE_SIZE;
890}
891
892static void release_spapr_tce_table(struct kvmppc_spapr_tce_table *stt)
893{
894 struct kvm *kvm = stt->kvm;
895 int i;
896
897 mutex_lock(&kvm->lock);
898 list_del(&stt->list);
899 for (i = 0; i < kvmppc_stt_npages(stt->window_size); i++)
900 __free_page(stt->pages[i]);
901 kfree(stt);
902 mutex_unlock(&kvm->lock);
903
904 kvm_put_kvm(kvm);
905}
906
907static int kvm_spapr_tce_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
908{
909 struct kvmppc_spapr_tce_table *stt = vma->vm_file->private_data;
910 struct page *page;
911
912 if (vmf->pgoff >= kvmppc_stt_npages(stt->window_size))
913 return VM_FAULT_SIGBUS;
914
915 page = stt->pages[vmf->pgoff];
916 get_page(page);
917 vmf->page = page;
918 return 0;
919}
920
921static const struct vm_operations_struct kvm_spapr_tce_vm_ops = {
922 .fault = kvm_spapr_tce_fault,
923};
924
925static int kvm_spapr_tce_mmap(struct file *file, struct vm_area_struct *vma)
926{
927 vma->vm_ops = &kvm_spapr_tce_vm_ops;
928 return 0;
929}
930
931static int kvm_spapr_tce_release(struct inode *inode, struct file *filp)
932{
933 struct kvmppc_spapr_tce_table *stt = filp->private_data;
934
935 release_spapr_tce_table(stt);
936 return 0;
937}
938
939static struct file_operations kvm_spapr_tce_fops = {
940 .mmap = kvm_spapr_tce_mmap,
941 .release = kvm_spapr_tce_release,
942};
943
944long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
945 struct kvm_create_spapr_tce *args)
946{
947 struct kvmppc_spapr_tce_table *stt = NULL;
948 long npages;
949 int ret = -ENOMEM;
950 int i;
951
952 /* Check this LIOBN hasn't been previously allocated */
953 list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) {
954 if (stt->liobn == args->liobn)
955 return -EBUSY;
956 }
957
958 npages = kvmppc_stt_npages(args->window_size);
959
960 stt = kzalloc(sizeof(*stt) + npages* sizeof(struct page *),
961 GFP_KERNEL);
962 if (!stt)
963 goto fail;
964
965 stt->liobn = args->liobn;
966 stt->window_size = args->window_size;
967 stt->kvm = kvm;
968
969 for (i = 0; i < npages; i++) {
970 stt->pages[i] = alloc_page(GFP_KERNEL | __GFP_ZERO);
971 if (!stt->pages[i])
972 goto fail;
973 }
974
975 kvm_get_kvm(kvm);
976
977 mutex_lock(&kvm->lock);
978 list_add(&stt->list, &kvm->arch.spapr_tce_tables);
979
980 mutex_unlock(&kvm->lock);
981
982 return anon_inode_getfd("kvm-spapr-tce", &kvm_spapr_tce_fops,
983 stt, O_RDWR);
984
985fail:
986 if (stt) {
987 for (i = 0; i < npages; i++)
988 if (stt->pages[i])
989 __free_page(stt->pages[i]);
990
991 kfree(stt);
992 }
993 return ret;
994}
995
aa04b4cc 996/* Work out RMLS (real mode limit selector) field value for a given RMA size.
9e368f29 997 Assumes POWER7 or PPC970. */
aa04b4cc
PM		 998static inline int lpcr_rmls(unsigned long rma_size)
999{
1000 switch (rma_size) {
1001 case 32ul << 20: /* 32 MB */
9e368f29
PM		 1002 if (cpu_has_feature(CPU_FTR_ARCH_206))
1003 return 8; /* only supported on POWER7 */
1004 return -1;
aa04b4cc
PM		 1005 case 64ul << 20: /* 64 MB */
1006 return 3;
1007 case 128ul << 20: /* 128 MB */
1008 return 7;
1009 case 256ul << 20: /* 256 MB */
1010 return 4;
1011 case 1ul << 30: /* 1 GB */
1012 return 2;
1013 case 16ul << 30: /* 16 GB */
1014 return 1;
1015 case 256ul << 30: /* 256 GB */
1016 return 0;
1017 default:
1018 return -1;
1019 }
1020}
1021
1022static int kvm_rma_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
1023{
1024 struct kvmppc_rma_info *ri = vma->vm_file->private_data;
1025 struct page *page;
1026
1027 if (vmf->pgoff >= ri->npages)
1028 return VM_FAULT_SIGBUS;
1029
1030 page = pfn_to_page(ri->base_pfn + vmf->pgoff);
1031 get_page(page);
1032 vmf->page = page;
1033 return 0;
1034}
1035
1036static const struct vm_operations_struct kvm_rma_vm_ops = {
1037 .fault = kvm_rma_fault,
1038};
1039
1040static int kvm_rma_mmap(struct file *file, struct vm_area_struct *vma)
1041{
1042 vma->vm_flags |= VM_RESERVED;
1043 vma->vm_ops = &kvm_rma_vm_ops;
1044 return 0;
1045}
1046
1047static int kvm_rma_release(struct inode *inode, struct file *filp)
1048{
1049 struct kvmppc_rma_info *ri = filp->private_data;
1050
1051 kvm_release_rma(ri);
1052 return 0;
1053}
1054
1055static struct file_operations kvm_rma_fops = {
1056 .mmap = kvm_rma_mmap,
1057 .release = kvm_rma_release,
1058};
1059
1060long kvm_vm_ioctl_allocate_rma(struct kvm *kvm, struct kvm_allocate_rma *ret)
1061{
1062 struct kvmppc_rma_info *ri;
1063 long fd;
1064
1065 ri = kvm_alloc_rma();
1066 if (!ri)
1067 return -ENOMEM;
1068
1069 fd = anon_inode_getfd("kvm-rma", &kvm_rma_fops, ri, O_RDWR);
1070 if (fd < 0)
1071 kvm_release_rma(ri);
1072
1073 ret->rma_size = ri->npages << PAGE_SHIFT;
1074 return fd;
1075}
1076
de56a948
PM		 1077int kvmppc_core_prepare_memory_region(struct kvm *kvm,
1078 struct kvm_userspace_memory_region *mem)
1079{
c77162de
PM		 1080 unsigned long psize;
1081 unsigned long npages;
b2b2f165 1082 unsigned long *phys;
aa04b4cc 1083
c77162de
PM		 1084 /* For now, only allow 16MB-aligned slots */
1085 psize = kvm->arch.ram_psize;
aa04b4cc
PM		 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
b2b2f165 1093 /* Allocate a slot_phys array */
c77162de 1094 npages = mem->memory_size >> kvm->arch.ram_porder;
b2b2f165
PM		 1095 phys = kvm->arch.slot_phys[mem->slot];
1096 if (!phys) {
1097 phys = vzalloc(npages * sizeof(unsigned long));
1098 if (!phys)
1099 return -ENOMEM;
1100 kvm->arch.slot_phys[mem->slot] = phys;
1101 kvm->arch.slot_npages[mem->slot] = npages;
1102 }
aa04b4cc 1103
c77162de
PM		 1104 return 0;
1105}
aa04b4cc 1106
c77162de
PM		 1107static void unpin_slot(struct kvm *kvm, int slot_id)
1108{
1109 unsigned long *physp;
1110 unsigned long j, npages, pfn;
1111 struct page *page;
1112
1113 physp = kvm->arch.slot_phys[slot_id];
1114 npages = kvm->arch.slot_npages[slot_id];
1115 if (physp) {
1116 spin_lock(&kvm->arch.slot_phys_lock);
1117 for (j = 0; j < npages; j++) {
1118 if (!(physp[j] & KVMPPC_GOT_PAGE))
1119 continue;
1120 pfn = physp[j] >> PAGE_SHIFT;
1121 page = pfn_to_page(pfn);
1122 SetPageDirty(page);
1123 put_page(page);
9e368f29 1124 }
c77162de
PM		 1125 kvm->arch.slot_phys[slot_id] = NULL;
1126 spin_unlock(&kvm->arch.slot_phys_lock);
1127 vfree(physp);
aa04b4cc 1128 }
c77162de
PM		 1129}
1130
1131void kvmppc_core_commit_memory_region(struct kvm *kvm,
1132 struct kvm_userspace_memory_region *mem)
1133{
1134}
1135
1136static int kvmppc_hv_setup_rma(struct kvm_vcpu *vcpu)
1137{
1138 int err = 0;
1139 struct kvm *kvm = vcpu->kvm;
1140 struct kvmppc_rma_info *ri = NULL;
1141 unsigned long hva;
1142 struct kvm_memory_slot *memslot;
1143 struct vm_area_struct *vma;
1144 unsigned long lpcr;
1145 unsigned long psize, porder;
1146 unsigned long rma_size;
1147 unsigned long rmls;
1148 unsigned long *physp;
1149 unsigned long i, npages, pa;
1150
1151 mutex_lock(&kvm->lock);
1152 if (kvm->arch.rma_setup_done)
1153 goto out; /* another vcpu beat us to it */
aa04b4cc 1154
c77162de
PM		 1155 /* Look up the memslot for guest physical address 0 */
1156 memslot = gfn_to_memslot(kvm, 0);
aa04b4cc 1157
c77162de
PM		 1158 /* We must have some memory at 0 by now */
1159 err = -EINVAL;
1160 if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID))
1161 goto out;
1162
1163 /* Look up the VMA for the start of this memory slot */
1164 hva = memslot->userspace_addr;
1165 down_read(&current->mm->mmap_sem);
1166 vma = find_vma(current->mm, hva);
1167 if (!vma || vma->vm_start > hva || (vma->vm_flags & VM_IO))
1168 goto up_out;
1169
1170 psize = vma_kernel_pagesize(vma);
1171 if (psize != kvm->arch.ram_psize)
1172 goto up_out;
1173
1174 /* Is this one of our preallocated RMAs? */
1175 if (vma->vm_file && vma->vm_file->f_op == &kvm_rma_fops &&
1176 hva == vma->vm_start)
1177 ri = vma->vm_file->private_data;
1178
1179 up_read(&current->mm->mmap_sem);
1180
1181 if (!ri) {
1182 /* On POWER7, use VRMA; on PPC970, give up */
1183 err = -EPERM;
1184 if (cpu_has_feature(CPU_FTR_ARCH_201)) {
1185 pr_err("KVM: CPU requires an RMO\n");
1186 goto out;
1187 }
1188
1189 /* Update VRMASD field in the LPCR */
1190 lpcr = kvm->arch.lpcr & ~(0x1fUL << LPCR_VRMASD_SH);
1191 lpcr |= LPCR_VRMA_L;
1192 kvm->arch.lpcr = lpcr;
1193
1194 /* Create HPTEs in the hash page table for the VRMA */
1195 kvmppc_map_vrma(vcpu, memslot);
1196
1197 } else {
1198 /* Set up to use an RMO region */
1199 rma_size = ri->npages;
1200 if (rma_size > memslot->npages)
1201 rma_size = memslot->npages;
1202 rma_size <<= PAGE_SHIFT;
aa04b4cc 1203 rmls = lpcr_rmls(rma_size);
c77162de 1204 err = -EINVAL;
aa04b4cc 1205 if (rmls < 0) {
c77162de
PM		 1206 pr_err("KVM: Can't use RMA of 0x%lx bytes\n", rma_size);
1207 goto out;
aa04b4cc
PM		 1208 }
1209 atomic_inc(&ri->use_count);
1210 kvm->arch.rma = ri;
9e368f29
PM		 1211
1212 /* Update LPCR and RMOR */
1213 lpcr = kvm->arch.lpcr;
1214 if (cpu_has_feature(CPU_FTR_ARCH_201)) {
1215 /* PPC970; insert RMLS value (split field) in HID4 */
1216 lpcr &= ~((1ul << HID4_RMLS0_SH) |
1217 (3ul << HID4_RMLS2_SH));
1218 lpcr |= ((rmls >> 2) << HID4_RMLS0_SH) |
1219 ((rmls & 3) << HID4_RMLS2_SH);
1220 /* RMOR is also in HID4 */
1221 lpcr |= ((ri->base_pfn >> (26 - PAGE_SHIFT)) & 0xffff)
1222 << HID4_RMOR_SH;
1223 } else {
1224 /* POWER7 */
1225 lpcr &= ~(LPCR_VPM0 | LPCR_VRMA_L);
1226 lpcr |= rmls << LPCR_RMLS_SH;
1227 kvm->arch.rmor = kvm->arch.rma->base_pfn << PAGE_SHIFT;
1228 }
aa04b4cc 1229 kvm->arch.lpcr = lpcr;
c77162de 1230 pr_info("KVM: Using RMO at %lx size %lx (LPCR = %lx)\n",
aa04b4cc 1231 ri->base_pfn << PAGE_SHIFT, rma_size, lpcr);
aa04b4cc 1232
c77162de
PM		 1233 /* Initialize phys addrs of pages in RMO */
1234 porder = kvm->arch.ram_porder;
1235 npages = rma_size >> porder;
1236 pa = ri->base_pfn << PAGE_SHIFT;
1237 physp = kvm->arch.slot_phys[memslot->id];
1238 spin_lock(&kvm->arch.slot_phys_lock);
1239 for (i = 0; i < npages; ++i)
1240 physp[i] = pa + (i << porder);
1241 spin_unlock(&kvm->arch.slot_phys_lock);
aa04b4cc
PM		 1242 }
1243
c77162de
PM		 1244 /* Order updates to kvm->arch.lpcr etc. vs. rma_setup_done */
1245 smp_wmb();
1246 kvm->arch.rma_setup_done = 1;
1247 err = 0;
1248 out:
1249 mutex_unlock(&kvm->lock);
1250 return err;
b2b2f165 1251
c77162de
PM		 1252 up_out:
1253 up_read(&current->mm->mmap_sem);
1254 goto out;
de56a948
PM		 1255}
1256
1257int kvmppc_core_init_vm(struct kvm *kvm)
1258{
1259 long r;
aa04b4cc 1260 unsigned long lpcr;
de56a948
PM		 1261
1262 /* Allocate hashed page table */
1263 r = kvmppc_alloc_hpt(kvm);
54738c09
DG		 1264 if (r)
1265 return r;
de56a948 1266
54738c09 1267 INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
aa04b4cc 1268
aa04b4cc
PM		 1269 kvm->arch.ram_psize = 1ul << LARGE_PAGE_ORDER;
1270 kvm->arch.ram_porder = LARGE_PAGE_ORDER;
1271 kvm->arch.rma = NULL;
aa04b4cc 1272
9e368f29 1273 kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
aa04b4cc 1274
9e368f29
PM		 1275 if (cpu_has_feature(CPU_FTR_ARCH_201)) {
1276 /* PPC970; HID4 is effectively the LPCR */
1277 unsigned long lpid = kvm->arch.lpid;
1278 kvm->arch.host_lpid = 0;
1279 kvm->arch.host_lpcr = lpcr = mfspr(SPRN_HID4);
1280 lpcr &= ~((3 << HID4_LPID1_SH) | (0xful << HID4_LPID5_SH));
1281 lpcr |= ((lpid >> 4) << HID4_LPID1_SH) |
1282 ((lpid & 0xf) << HID4_LPID5_SH);
1283 } else {
1284 /* POWER7; init LPCR for virtual RMA mode */
1285 kvm->arch.host_lpid = mfspr(SPRN_LPID);
1286 kvm->arch.host_lpcr = lpcr = mfspr(SPRN_LPCR);
1287 lpcr &= LPCR_PECE | LPCR_LPES;
1288 lpcr |= (4UL << LPCR_DPFD_SH) | LPCR_HDICE |
1289 LPCR_VPM0 | LPCR_VRMA_L;
1290 }
1291 kvm->arch.lpcr = lpcr;
aa04b4cc 1292
c77162de 1293 spin_lock_init(&kvm->arch.slot_phys_lock);
54738c09 1294 return 0;
de56a948
PM		 1295}
1296
1297void kvmppc_core_destroy_vm(struct kvm *kvm)
1298{
aa04b4cc
PM		 1299 unsigned long i;
1300
b2b2f165
PM		 1301 for (i = 0; i < KVM_MEM_SLOTS_NUM; i++)
1302 unpin_slot(kvm, i);
1303
aa04b4cc
PM		 1304 if (kvm->arch.rma) {
1305 kvm_release_rma(kvm->arch.rma);
1306 kvm->arch.rma = NULL;
1307 }
1308
de56a948 1309 kvmppc_free_hpt(kvm);
54738c09 1310 WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
de56a948
PM		 1311}
1312
1313/* These are stubs for now */
1314void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
1315{
1316}
1317
1318/* We don't need to emulate any privileged instructions or dcbz */
1319int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
1320 unsigned int inst, int *advance)
1321{
1322 return EMULATE_FAIL;
1323}
1324
1325int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
1326{
1327 return EMULATE_FAIL;
1328}
1329
1330int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
1331{
1332 return EMULATE_FAIL;
1333}
1334
1335static int kvmppc_book3s_hv_init(void)
1336{
1337 int r;
1338
1339 r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
1340
1341 if (r)
1342 return r;
1343
1344 r = kvmppc_mmu_hv_init();
1345
1346 return r;
1347}
1348
1349static void kvmppc_book3s_hv_exit(void)
1350{
1351 kvm_exit();
1352}
1353
1354module_init(kvmppc_book3s_hv_init);
1355module_exit(kvmppc_book3s_hv_exit);
kernel source for telekom puls (alcatel/mediatek)