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KVM: ia64: fix locking order entering guest
[linux-2.6/btrfs-unstable.git] / arch / ia64 / kvm / kvm-ia64.c
blobd20a5db4c4dde90674debfd2eb370b4434870b89
1 /*
2 * kvm_ia64.c: Basic KVM suppport On Itanium series processors
3 *
4 *
5 * Copyright (C) 2007, Intel Corporation.
6 * Xiantao Zhang (xiantao.zhang@intel.com)
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms and conditions of the GNU General Public License,
10 * version 2, as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
19 * Place - Suite 330, Boston, MA 02111-1307 USA.
20 *
21 */
22
23 #include <linux/module.h>
24 #include <linux/errno.h>
25 #include <linux/percpu.h>
26 #include <linux/gfp.h>
27 #include <linux/fs.h>
28 #include <linux/smp.h>
29 #include <linux/kvm_host.h>
30 #include <linux/kvm.h>
31 #include <linux/bitops.h>
32 #include <linux/hrtimer.h>
33 #include <linux/uaccess.h>
34 #include <linux/iommu.h>
35 #include <linux/intel-iommu.h>
36
37 #include <asm/pgtable.h>
38 #include <asm/gcc_intrin.h>
39 #include <asm/pal.h>
40 #include <asm/cacheflush.h>
41 #include <asm/div64.h>
42 #include <asm/tlb.h>
43 #include <asm/elf.h>
44
45 #include "misc.h"
46 #include "vti.h"
47 #include "iodev.h"
48 #include "ioapic.h"
49 #include "lapic.h"
50 #include "irq.h"
51
52 static unsigned long kvm_vmm_base;
53 static unsigned long kvm_vsa_base;
54 static unsigned long kvm_vm_buffer;
55 static unsigned long kvm_vm_buffer_size;
56 unsigned long kvm_vmm_gp;
57
58 static long vp_env_info;
59
60 static struct kvm_vmm_info *kvm_vmm_info;
61
62 static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu);
63
64 struct kvm_stats_debugfs_item debugfs_entries[] = {
65 { NULL }
66 };
67
68 static void kvm_flush_icache(unsigned long start, unsigned long len)
69 {
70 int l;
71
72 for (l = 0; l < (len + 32); l += 32)
73 ia64_fc((void *)(start + l));
74
75 ia64_sync_i();
76 ia64_srlz_i();
77 }
78
79 static void kvm_flush_tlb_all(void)
80 {
81 unsigned long i, j, count0, count1, stride0, stride1, addr;
82 long flags;
83
84 addr = local_cpu_data->ptce_base;
85 count0 = local_cpu_data->ptce_count[0];
86 count1 = local_cpu_data->ptce_count[1];
87 stride0 = local_cpu_data->ptce_stride[0];
88 stride1 = local_cpu_data->ptce_stride[1];
89
90 local_irq_save(flags);
91 for (i = 0; i < count0; ++i) {
92 for (j = 0; j < count1; ++j) {
93 ia64_ptce(addr);
94 addr += stride1;
95 }
96 addr += stride0;
97 }
98 local_irq_restore(flags);
99 ia64_srlz_i(); /* srlz.i implies srlz.d */
100 }
101
102 long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler)
103 {
104 struct ia64_pal_retval iprv;
105
106 PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva,
107 (u64)opt_handler);
108
109 return iprv.status;
110 }
111
112 static DEFINE_SPINLOCK(vp_lock);
113
114 void kvm_arch_hardware_enable(void *garbage)
115 {
116 long status;
117 long tmp_base;
118 unsigned long pte;
119 unsigned long saved_psr;
120 int slot;
121
122 pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
123 PAGE_KERNEL));
124 local_irq_save(saved_psr);
125 slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
126 local_irq_restore(saved_psr);
127 if (slot < 0)
128 return;
129
130 spin_lock(&vp_lock);
131 status = ia64_pal_vp_init_env(kvm_vsa_base ?
132 VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
133 __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
134 if (status != 0) {
135 printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
136 return ;
137 }
138
139 if (!kvm_vsa_base) {
140 kvm_vsa_base = tmp_base;
141 printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
142 }
143 spin_unlock(&vp_lock);
144 ia64_ptr_entry(0x3, slot);
145 }
146
147 void kvm_arch_hardware_disable(void *garbage)
148 {
149
150 long status;
151 int slot;
152 unsigned long pte;
153 unsigned long saved_psr;
154 unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
155
156 pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
157 PAGE_KERNEL));
158
159 local_irq_save(saved_psr);
160 slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
161 local_irq_restore(saved_psr);
162 if (slot < 0)
163 return;
164
165 status = ia64_pal_vp_exit_env(host_iva);
166 if (status)
167 printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
168 status);
169 ia64_ptr_entry(0x3, slot);
170 }
171
172 void kvm_arch_check_processor_compat(void *rtn)
173 {
174 *(int *)rtn = 0;
175 }
176
177 int kvm_dev_ioctl_check_extension(long ext)
178 {
179
180 int r;
181
182 switch (ext) {
183 case KVM_CAP_IRQCHIP:
184 case KVM_CAP_MP_STATE:
185 case KVM_CAP_IRQ_INJECT_STATUS:
186 r = 1;
187 break;
188 case KVM_CAP_COALESCED_MMIO:
189 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
190 break;
191 case KVM_CAP_IOMMU:
192 r = iommu_found();
193 break;
194 default:
195 r = 0;
196 }
197 return r;
198
199 }
200
201 static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
202 gpa_t addr, int len, int is_write)
203 {
204 struct kvm_io_device *dev;
205
206 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, is_write);
207
208 return dev;
209 }
210
211 static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
212 {
213 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
214 kvm_run->hw.hardware_exit_reason = 1;
215 return 0;
216 }
217
218 static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
219 {
220 struct kvm_mmio_req *p;
221 struct kvm_io_device *mmio_dev;
222
223 p = kvm_get_vcpu_ioreq(vcpu);
224
225 if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS)
226 goto mmio;
227 vcpu->mmio_needed = 1;
228 vcpu->mmio_phys_addr = kvm_run->mmio.phys_addr = p->addr;
229 vcpu->mmio_size = kvm_run->mmio.len = p->size;
230 vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir;
231
232 if (vcpu->mmio_is_write)
233 memcpy(vcpu->mmio_data, &p->data, p->size);
234 memcpy(kvm_run->mmio.data, &p->data, p->size);
235 kvm_run->exit_reason = KVM_EXIT_MMIO;
236 return 0;
237 mmio:
238 mmio_dev = vcpu_find_mmio_dev(vcpu, p->addr, p->size, !p->dir);
239 if (mmio_dev) {
240 if (!p->dir)
241 kvm_iodevice_write(mmio_dev, p->addr, p->size,
242 &p->data);
243 else
244 kvm_iodevice_read(mmio_dev, p->addr, p->size,
245 &p->data);
246
247 } else
248 printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr);
249 p->state = STATE_IORESP_READY;
250
251 return 1;
252 }
253
254 static int handle_pal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
255 {
256 struct exit_ctl_data *p;
257
258 p = kvm_get_exit_data(vcpu);
259
260 if (p->exit_reason == EXIT_REASON_PAL_CALL)
261 return kvm_pal_emul(vcpu, kvm_run);
262 else {
263 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
264 kvm_run->hw.hardware_exit_reason = 2;
265 return 0;
266 }
267 }
268
269 static int handle_sal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
270 {
271 struct exit_ctl_data *p;
272
273 p = kvm_get_exit_data(vcpu);
274
275 if (p->exit_reason == EXIT_REASON_SAL_CALL) {
276 kvm_sal_emul(vcpu);
277 return 1;
278 } else {
279 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
280 kvm_run->hw.hardware_exit_reason = 3;
281 return 0;
282 }
283
284 }
285
286 /*
287 * offset: address offset to IPI space.
288 * value: deliver value.
289 */
290 static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm,
291 uint64_t vector)
292 {
293 switch (dm) {
294 case SAPIC_FIXED:
295 kvm_apic_set_irq(vcpu, vector, 0);
296 break;
297 case SAPIC_NMI:
298 kvm_apic_set_irq(vcpu, 2, 0);
299 break;
300 case SAPIC_EXTINT:
301 kvm_apic_set_irq(vcpu, 0, 0);
302 break;
303 case SAPIC_INIT:
304 case SAPIC_PMI:
305 default:
306 printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n");
307 break;
308 }
309 }
310
311 static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id,
312 unsigned long eid)
313 {
314 union ia64_lid lid;
315 int i;
316
317 for (i = 0; i < kvm->arch.online_vcpus; i++) {
318 if (kvm->vcpus[i]) {
319 lid.val = VCPU_LID(kvm->vcpus[i]);
320 if (lid.id == id && lid.eid == eid)
321 return kvm->vcpus[i];
322 }
323 }
324
325 return NULL;
326 }
327
328 static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
329 {
330 struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
331 struct kvm_vcpu *target_vcpu;
332 struct kvm_pt_regs *regs;
333 union ia64_ipi_a addr = p->u.ipi_data.addr;
334 union ia64_ipi_d data = p->u.ipi_data.data;
335
336 target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid);
337 if (!target_vcpu)
338 return handle_vm_error(vcpu, kvm_run);
339
340 if (!target_vcpu->arch.launched) {
341 regs = vcpu_regs(target_vcpu);
342
343 regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip;
344 regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp;
345
346 target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
347 if (waitqueue_active(&target_vcpu->wq))
348 wake_up_interruptible(&target_vcpu->wq);
349 } else {
350 vcpu_deliver_ipi(target_vcpu, data.dm, data.vector);
351 if (target_vcpu != vcpu)
352 kvm_vcpu_kick(target_vcpu);
353 }
354
355 return 1;
356 }
357
358 struct call_data {
359 struct kvm_ptc_g ptc_g_data;
360 struct kvm_vcpu *vcpu;
361 };
362
363 static void vcpu_global_purge(void *info)
364 {
365 struct call_data *p = (struct call_data *)info;
366 struct kvm_vcpu *vcpu = p->vcpu;
367
368 if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
369 return;
370
371 set_bit(KVM_REQ_PTC_G, &vcpu->requests);
372 if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) {
373 vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] =
374 p->ptc_g_data;
375 } else {
376 clear_bit(KVM_REQ_PTC_G, &vcpu->requests);
377 vcpu->arch.ptc_g_count = 0;
378 set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
379 }
380 }
381
382 static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
383 {
384 struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
385 struct kvm *kvm = vcpu->kvm;
386 struct call_data call_data;
387 int i;
388
389 call_data.ptc_g_data = p->u.ptc_g_data;
390
391 for (i = 0; i < kvm->arch.online_vcpus; i++) {
392 if (!kvm->vcpus[i] || kvm->vcpus[i]->arch.mp_state ==
393 KVM_MP_STATE_UNINITIALIZED ||
394 vcpu == kvm->vcpus[i])
395 continue;
396
397 if (waitqueue_active(&kvm->vcpus[i]->wq))
398 wake_up_interruptible(&kvm->vcpus[i]->wq);
399
400 if (kvm->vcpus[i]->cpu != -1) {
401 call_data.vcpu = kvm->vcpus[i];
402 smp_call_function_single(kvm->vcpus[i]->cpu,
403 vcpu_global_purge, &call_data, 1);
404 } else
405 printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
406
407 }
408 return 1;
409 }
410
411 static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
412 {
413 return 1;
414 }
415
416 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
417 {
418
419 ktime_t kt;
420 long itc_diff;
421 unsigned long vcpu_now_itc;
422 unsigned long expires;
423 struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
424 unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
425 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
426
427 if (irqchip_in_kernel(vcpu->kvm)) {
428
429 vcpu_now_itc = ia64_getreg(_IA64_REG_AR_ITC) + vcpu->arch.itc_offset;
430
431 if (time_after(vcpu_now_itc, vpd->itm)) {
432 vcpu->arch.timer_check = 1;
433 return 1;
434 }
435 itc_diff = vpd->itm - vcpu_now_itc;
436 if (itc_diff < 0)
437 itc_diff = -itc_diff;
438
439 expires = div64_u64(itc_diff, cyc_per_usec);
440 kt = ktime_set(0, 1000 * expires);
441
442 vcpu->arch.ht_active = 1;
443 hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
444
445 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
446 kvm_vcpu_block(vcpu);
447 hrtimer_cancel(p_ht);
448 vcpu->arch.ht_active = 0;
449
450 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests))
451 if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
452 vcpu->arch.mp_state =
453 KVM_MP_STATE_RUNNABLE;
454
455 if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
456 return -EINTR;
457 return 1;
458 } else {
459 printk(KERN_ERR"kvm: Unsupported userspace halt!");
460 return 0;
461 }
462 }
463
464 static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
465 struct kvm_run *kvm_run)
466 {
467 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
468 return 0;
469 }
470
471 static int handle_external_interrupt(struct kvm_vcpu *vcpu,
472 struct kvm_run *kvm_run)
473 {
474 return 1;
475 }
476
477 static int handle_vcpu_debug(struct kvm_vcpu *vcpu,
478 struct kvm_run *kvm_run)
479 {
480 printk("VMM: %s", vcpu->arch.log_buf);
481 return 1;
482 }
483
484 static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
485 struct kvm_run *kvm_run) = {
486 [EXIT_REASON_VM_PANIC] = handle_vm_error,
487 [EXIT_REASON_MMIO_INSTRUCTION] = handle_mmio,
488 [EXIT_REASON_PAL_CALL] = handle_pal_call,
489 [EXIT_REASON_SAL_CALL] = handle_sal_call,
490 [EXIT_REASON_SWITCH_RR6] = handle_switch_rr6,
491 [EXIT_REASON_VM_DESTROY] = handle_vm_shutdown,
492 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
493 [EXIT_REASON_IPI] = handle_ipi,
494 [EXIT_REASON_PTC_G] = handle_global_purge,
495 [EXIT_REASON_DEBUG] = handle_vcpu_debug,
496
497 };
498
499 static const int kvm_vti_max_exit_handlers =
500 sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
501
502 static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
503 {
504 struct exit_ctl_data *p_exit_data;
505
506 p_exit_data = kvm_get_exit_data(vcpu);
507 return p_exit_data->exit_reason;
508 }
509
510 /*
511 * The guest has exited. See if we can fix it or if we need userspace
512 * assistance.
513 */
514 static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
515 {
516 u32 exit_reason = kvm_get_exit_reason(vcpu);
517 vcpu->arch.last_exit = exit_reason;
518
519 if (exit_reason < kvm_vti_max_exit_handlers
520 && kvm_vti_exit_handlers[exit_reason])
521 return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
522 else {
523 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
524 kvm_run->hw.hardware_exit_reason = exit_reason;
525 }
526 return 0;
527 }
528
529 static inline void vti_set_rr6(unsigned long rr6)
530 {
531 ia64_set_rr(RR6, rr6);
532 ia64_srlz_i();
533 }
534
535 static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
536 {
537 unsigned long pte;
538 struct kvm *kvm = vcpu->kvm;
539 int r;
540
541 /*Insert a pair of tr to map vmm*/
542 pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
543 r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
544 if (r < 0)
545 goto out;
546 vcpu->arch.vmm_tr_slot = r;
547 /*Insert a pairt of tr to map data of vm*/
548 pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
549 r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
550 pte, KVM_VM_DATA_SHIFT);
551 if (r < 0)
552 goto out;
553 vcpu->arch.vm_tr_slot = r;
554 r = 0;
555 out:
556 return r;
557
558 }
559
560 static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
561 {
562
563 ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
564 ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
565
566 }
567
568 static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
569 {
570 int cpu = smp_processor_id();
571
572 if (vcpu->arch.last_run_cpu != cpu ||
573 per_cpu(last_vcpu, cpu) != vcpu) {
574 per_cpu(last_vcpu, cpu) = vcpu;
575 vcpu->arch.last_run_cpu = cpu;
576 kvm_flush_tlb_all();
577 }
578
579 vcpu->arch.host_rr6 = ia64_get_rr(RR6);
580 vti_set_rr6(vcpu->arch.vmm_rr);
581 return kvm_insert_vmm_mapping(vcpu);
582 }
583 static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
584 {
585 kvm_purge_vmm_mapping(vcpu);
586 vti_set_rr6(vcpu->arch.host_rr6);
587 }
588
589 static int vti_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
590 {
591 union context *host_ctx, *guest_ctx;
592 int r;
593
594 /*Get host and guest context with guest address space.*/
595 host_ctx = kvm_get_host_context(vcpu);
596 guest_ctx = kvm_get_guest_context(vcpu);
597
598 r = kvm_vcpu_pre_transition(vcpu);
599 if (r < 0)
600 goto out;
601 kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
602 kvm_vcpu_post_transition(vcpu);
603 r = 0;
604 out:
605 return r;
606 }
607
608 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
609 {
610 int r;
611
612 again:
613 if (signal_pending(current)) {
614 r = -EINTR;
615 kvm_run->exit_reason = KVM_EXIT_INTR;
616 goto out;
617 }
618
619 /*
620 * down_read() may sleep and return with interrupts enabled
621 */
622 down_read(&vcpu->kvm->slots_lock);
623
624 preempt_disable();
625 local_irq_disable();
626
627 vcpu->guest_mode = 1;
628 kvm_guest_enter();
629 r = vti_vcpu_run(vcpu, kvm_run);
630 if (r < 0) {
631 local_irq_enable();
632 preempt_enable();
633 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
634 goto out;
635 }
636
637 vcpu->arch.launched = 1;
638 vcpu->guest_mode = 0;
639 local_irq_enable();
640
641 /*
642 * We must have an instruction between local_irq_enable() and
643 * kvm_guest_exit(), so the timer interrupt isn't delayed by
644 * the interrupt shadow. The stat.exits increment will do nicely.
645 * But we need to prevent reordering, hence this barrier():
646 */
647 barrier();
648 kvm_guest_exit();
649 up_read(&vcpu->kvm->slots_lock);
650 preempt_enable();
651
652 r = kvm_handle_exit(kvm_run, vcpu);
653
654 if (r > 0) {
655 if (!need_resched())
656 goto again;
657 }
658
659 out:
660 if (r > 0) {
661 kvm_resched(vcpu);
662 goto again;
663 }
664
665 return r;
666 }
667
668 static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
669 {
670 struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
671
672 if (!vcpu->mmio_is_write)
673 memcpy(&p->data, vcpu->mmio_data, 8);
674 p->state = STATE_IORESP_READY;
675 }
676
677 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
678 {
679 int r;
680 sigset_t sigsaved;
681
682 vcpu_load(vcpu);
683
684 if (vcpu->sigset_active)
685 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
686
687 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
688 kvm_vcpu_block(vcpu);
689 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
690 r = -EAGAIN;
691 goto out;
692 }
693
694 if (vcpu->mmio_needed) {
695 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
696 kvm_set_mmio_data(vcpu);
697 vcpu->mmio_read_completed = 1;
698 vcpu->mmio_needed = 0;
699 }
700 r = __vcpu_run(vcpu, kvm_run);
701 out:
702 if (vcpu->sigset_active)
703 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
704
705 vcpu_put(vcpu);
706 return r;
707 }
708
709 static struct kvm *kvm_alloc_kvm(void)
710 {
711
712 struct kvm *kvm;
713 uint64_t vm_base;
714
715 BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
716
717 vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
718
719 if (!vm_base)
720 return ERR_PTR(-ENOMEM);
721
722 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
723 kvm = (struct kvm *)(vm_base +
724 offsetof(struct kvm_vm_data, kvm_vm_struct));
725 kvm->arch.vm_base = vm_base;
726 printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
727
728 return kvm;
729 }
730
731 struct kvm_io_range {
732 unsigned long start;
733 unsigned long size;
734 unsigned long type;
735 };
736
737 static const struct kvm_io_range io_ranges[] = {
738 {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
739 {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
740 {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
741 {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
742 {PIB_START, PIB_SIZE, GPFN_PIB},
743 };
744
745 static void kvm_build_io_pmt(struct kvm *kvm)
746 {
747 unsigned long i, j;
748
749 /* Mark I/O ranges */
750 for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
751 i++) {
752 for (j = io_ranges[i].start;
753 j < io_ranges[i].start + io_ranges[i].size;
754 j += PAGE_SIZE)
755 kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
756 io_ranges[i].type, 0);
757 }
758
759 }
760
761 /*Use unused rids to virtualize guest rid.*/
762 #define GUEST_PHYSICAL_RR0 0x1739
763 #define GUEST_PHYSICAL_RR4 0x2739
764 #define VMM_INIT_RR 0x1660
765
766 static void kvm_init_vm(struct kvm *kvm)
767 {
768 BUG_ON(!kvm);
769
770 kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
771 kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
772 kvm->arch.vmm_init_rr = VMM_INIT_RR;
773
774 /*
775 *Fill P2M entries for MMIO/IO ranges
776 */
777 kvm_build_io_pmt(kvm);
778
779 INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
780
781 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
782 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
783 }
784
785 struct kvm *kvm_arch_create_vm(void)
786 {
787 struct kvm *kvm = kvm_alloc_kvm();
788
789 if (IS_ERR(kvm))
790 return ERR_PTR(-ENOMEM);
791 kvm_init_vm(kvm);
792
793 kvm->arch.online_vcpus = 0;
794
795 return kvm;
796
797 }
798
799 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
800 struct kvm_irqchip *chip)
801 {
802 int r;
803
804 r = 0;
805 switch (chip->chip_id) {
806 case KVM_IRQCHIP_IOAPIC:
807 memcpy(&chip->chip.ioapic, ioapic_irqchip(kvm),
808 sizeof(struct kvm_ioapic_state));
809 break;
810 default:
811 r = -EINVAL;
812 break;
813 }
814 return r;
815 }
816
817 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
818 {
819 int r;
820
821 r = 0;
822 switch (chip->chip_id) {
823 case KVM_IRQCHIP_IOAPIC:
824 memcpy(ioapic_irqchip(kvm),
825 &chip->chip.ioapic,
826 sizeof(struct kvm_ioapic_state));
827 break;
828 default:
829 r = -EINVAL;
830 break;
831 }
832 return r;
833 }
834
835 #define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
836
837 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
838 {
839 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
840 int i;
841
842 vcpu_load(vcpu);
843
844 for (i = 0; i < 16; i++) {
845 vpd->vgr[i] = regs->vpd.vgr[i];
846 vpd->vbgr[i] = regs->vpd.vbgr[i];
847 }
848 for (i = 0; i < 128; i++)
849 vpd->vcr[i] = regs->vpd.vcr[i];
850 vpd->vhpi = regs->vpd.vhpi;
851 vpd->vnat = regs->vpd.vnat;
852 vpd->vbnat = regs->vpd.vbnat;
853 vpd->vpsr = regs->vpd.vpsr;
854
855 vpd->vpr = regs->vpd.vpr;
856
857 memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
858
859 RESTORE_REGS(mp_state);
860 RESTORE_REGS(vmm_rr);
861 memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
862 memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
863 RESTORE_REGS(itr_regions);
864 RESTORE_REGS(dtr_regions);
865 RESTORE_REGS(tc_regions);
866 RESTORE_REGS(irq_check);
867 RESTORE_REGS(itc_check);
868 RESTORE_REGS(timer_check);
869 RESTORE_REGS(timer_pending);
870 RESTORE_REGS(last_itc);
871 for (i = 0; i < 8; i++) {
872 vcpu->arch.vrr[i] = regs->vrr[i];
873 vcpu->arch.ibr[i] = regs->ibr[i];
874 vcpu->arch.dbr[i] = regs->dbr[i];
875 }
876 for (i = 0; i < 4; i++)
877 vcpu->arch.insvc[i] = regs->insvc[i];
878 RESTORE_REGS(xtp);
879 RESTORE_REGS(metaphysical_rr0);
880 RESTORE_REGS(metaphysical_rr4);
881 RESTORE_REGS(metaphysical_saved_rr0);
882 RESTORE_REGS(metaphysical_saved_rr4);
883 RESTORE_REGS(fp_psr);
884 RESTORE_REGS(saved_gp);
885
886 vcpu->arch.irq_new_pending = 1;
887 vcpu->arch.itc_offset = regs->saved_itc - ia64_getreg(_IA64_REG_AR_ITC);
888 set_bit(KVM_REQ_RESUME, &vcpu->requests);
889
890 vcpu_put(vcpu);
891
892 return 0;
893 }
894
895 long kvm_arch_vm_ioctl(struct file *filp,
896 unsigned int ioctl, unsigned long arg)
897 {
898 struct kvm *kvm = filp->private_data;
899 void __user *argp = (void __user *)arg;
900 int r = -EINVAL;
901
902 switch (ioctl) {
903 case KVM_SET_MEMORY_REGION: {
904 struct kvm_memory_region kvm_mem;
905 struct kvm_userspace_memory_region kvm_userspace_mem;
906
907 r = -EFAULT;
908 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
909 goto out;
910 kvm_userspace_mem.slot = kvm_mem.slot;
911 kvm_userspace_mem.flags = kvm_mem.flags;
912 kvm_userspace_mem.guest_phys_addr =
913 kvm_mem.guest_phys_addr;
914 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
915 r = kvm_vm_ioctl_set_memory_region(kvm,
916 &kvm_userspace_mem, 0);
917 if (r)
918 goto out;
919 break;
920 }
921 case KVM_CREATE_IRQCHIP:
922 r = -EFAULT;
923 r = kvm_ioapic_init(kvm);
924 if (r)
925 goto out;
926 r = kvm_setup_default_irq_routing(kvm);
927 if (r) {
928 kfree(kvm->arch.vioapic);
929 goto out;
930 }
931 break;
932 case KVM_IRQ_LINE_STATUS:
933 case KVM_IRQ_LINE: {
934 struct kvm_irq_level irq_event;
935
936 r = -EFAULT;
937 if (copy_from_user(&irq_event, argp, sizeof irq_event))
938 goto out;
939 if (irqchip_in_kernel(kvm)) {
940 __s32 status;
941 mutex_lock(&kvm->lock);
942 status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
943 irq_event.irq, irq_event.level);
944 mutex_unlock(&kvm->lock);
945 if (ioctl == KVM_IRQ_LINE_STATUS) {
946 irq_event.status = status;
947 if (copy_to_user(argp, &irq_event,
948 sizeof irq_event))
949 goto out;
950 }
951 r = 0;
952 }
953 break;
954 }
955 case KVM_GET_IRQCHIP: {
956 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
957 struct kvm_irqchip chip;
958
959 r = -EFAULT;
960 if (copy_from_user(&chip, argp, sizeof chip))
961 goto out;
962 r = -ENXIO;
963 if (!irqchip_in_kernel(kvm))
964 goto out;
965 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
966 if (r)
967 goto out;
968 r = -EFAULT;
969 if (copy_to_user(argp, &chip, sizeof chip))
970 goto out;
971 r = 0;
972 break;
973 }
974 case KVM_SET_IRQCHIP: {
975 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
976 struct kvm_irqchip chip;
977
978 r = -EFAULT;
979 if (copy_from_user(&chip, argp, sizeof chip))
980 goto out;
981 r = -ENXIO;
982 if (!irqchip_in_kernel(kvm))
983 goto out;
984 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
985 if (r)
986 goto out;
987 r = 0;
988 break;
989 }
990 default:
991 ;
992 }
993 out:
994 return r;
995 }
996
997 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
998 struct kvm_sregs *sregs)
999 {
1000 return -EINVAL;
1001 }
1002
1003 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1004 struct kvm_sregs *sregs)
1005 {
1006 return -EINVAL;
1007
1008 }
1009 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1010 struct kvm_translation *tr)
1011 {
1012
1013 return -EINVAL;
1014 }
1015
1016 static int kvm_alloc_vmm_area(void)
1017 {
1018 if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1019 kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1020 get_order(KVM_VMM_SIZE));
1021 if (!kvm_vmm_base)
1022 return -ENOMEM;
1023
1024 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1025 kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1026
1027 printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1028 kvm_vmm_base, kvm_vm_buffer);
1029 }
1030
1031 return 0;
1032 }
1033
1034 static void kvm_free_vmm_area(void)
1035 {
1036 if (kvm_vmm_base) {
1037 /*Zero this area before free to avoid bits leak!!*/
1038 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1039 free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1040 kvm_vmm_base = 0;
1041 kvm_vm_buffer = 0;
1042 kvm_vsa_base = 0;
1043 }
1044 }
1045
1046 static void vti_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1047 {
1048 }
1049
1050 static int vti_init_vpd(struct kvm_vcpu *vcpu)
1051 {
1052 int i;
1053 union cpuid3_t cpuid3;
1054 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1055
1056 if (IS_ERR(vpd))
1057 return PTR_ERR(vpd);
1058
1059 /* CPUID init */
1060 for (i = 0; i < 5; i++)
1061 vpd->vcpuid[i] = ia64_get_cpuid(i);
1062
1063 /* Limit the CPUID number to 5 */
1064 cpuid3.value = vpd->vcpuid[3];
1065 cpuid3.number = 4; /* 5 - 1 */
1066 vpd->vcpuid[3] = cpuid3.value;
1067
1068 /*Set vac and vdc fields*/
1069 vpd->vac.a_from_int_cr = 1;
1070 vpd->vac.a_to_int_cr = 1;
1071 vpd->vac.a_from_psr = 1;
1072 vpd->vac.a_from_cpuid = 1;
1073 vpd->vac.a_cover = 1;
1074 vpd->vac.a_bsw = 1;
1075 vpd->vac.a_int = 1;
1076 vpd->vdc.d_vmsw = 1;
1077
1078 /*Set virtual buffer*/
1079 vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
1080
1081 return 0;
1082 }
1083
1084 static int vti_create_vp(struct kvm_vcpu *vcpu)
1085 {
1086 long ret;
1087 struct vpd *vpd = vcpu->arch.vpd;
1088 unsigned long vmm_ivt;
1089
1090 vmm_ivt = kvm_vmm_info->vmm_ivt;
1091
1092 printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
1093
1094 ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
1095
1096 if (ret) {
1097 printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
1098 return -EINVAL;
1099 }
1100 return 0;
1101 }
1102
1103 static void init_ptce_info(struct kvm_vcpu *vcpu)
1104 {
1105 ia64_ptce_info_t ptce = {0};
1106
1107 ia64_get_ptce(&ptce);
1108 vcpu->arch.ptce_base = ptce.base;
1109 vcpu->arch.ptce_count[0] = ptce.count[0];
1110 vcpu->arch.ptce_count[1] = ptce.count[1];
1111 vcpu->arch.ptce_stride[0] = ptce.stride[0];
1112 vcpu->arch.ptce_stride[1] = ptce.stride[1];
1113 }
1114
1115 static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
1116 {
1117 struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
1118
1119 if (hrtimer_cancel(p_ht))
1120 hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
1121 }
1122
1123 static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
1124 {
1125 struct kvm_vcpu *vcpu;
1126 wait_queue_head_t *q;
1127
1128 vcpu = container_of(data, struct kvm_vcpu, arch.hlt_timer);
1129 q = &vcpu->wq;
1130
1131 if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
1132 goto out;
1133
1134 if (waitqueue_active(q))
1135 wake_up_interruptible(q);
1136
1137 out:
1138 vcpu->arch.timer_fired = 1;
1139 vcpu->arch.timer_check = 1;
1140 return HRTIMER_NORESTART;
1141 }
1142
1143 #define PALE_RESET_ENTRY 0x80000000ffffffb0UL
1144
1145 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1146 {
1147 struct kvm_vcpu *v;
1148 int r;
1149 int i;
1150 long itc_offset;
1151 struct kvm *kvm = vcpu->kvm;
1152 struct kvm_pt_regs *regs = vcpu_regs(vcpu);
1153
1154 union context *p_ctx = &vcpu->arch.guest;
1155 struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
1156
1157 /*Init vcpu context for first run.*/
1158 if (IS_ERR(vmm_vcpu))
1159 return PTR_ERR(vmm_vcpu);
1160
1161 if (vcpu->vcpu_id == 0) {
1162 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1163
1164 /*Set entry address for first run.*/
1165 regs->cr_iip = PALE_RESET_ENTRY;
1166
1167 /*Initialize itc offset for vcpus*/
1168 itc_offset = 0UL - ia64_getreg(_IA64_REG_AR_ITC);
1169 for (i = 0; i < kvm->arch.online_vcpus; i++) {
1170 v = (struct kvm_vcpu *)((char *)vcpu +
1171 sizeof(struct kvm_vcpu_data) * i);
1172 v->arch.itc_offset = itc_offset;
1173 v->arch.last_itc = 0;
1174 }
1175 } else
1176 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
1177
1178 r = -ENOMEM;
1179 vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
1180 if (!vcpu->arch.apic)
1181 goto out;
1182 vcpu->arch.apic->vcpu = vcpu;
1183
1184 p_ctx->gr[1] = 0;
1185 p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + KVM_STK_OFFSET);
1186 p_ctx->gr[13] = (unsigned long)vmm_vcpu;
1187 p_ctx->psr = 0x1008522000UL;
1188 p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
1189 p_ctx->caller_unat = 0;
1190 p_ctx->pr = 0x0;
1191 p_ctx->ar[36] = 0x0; /*unat*/
1192 p_ctx->ar[19] = 0x0; /*rnat*/
1193 p_ctx->ar[18] = (unsigned long)vmm_vcpu +
1194 ((sizeof(struct kvm_vcpu)+15) & ~15);
1195 p_ctx->ar[64] = 0x0; /*pfs*/
1196 p_ctx->cr[0] = 0x7e04UL;
1197 p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
1198 p_ctx->cr[8] = 0x3c;
1199
1200 /*Initilize region register*/
1201 p_ctx->rr[0] = 0x30;
1202 p_ctx->rr[1] = 0x30;
1203 p_ctx->rr[2] = 0x30;
1204 p_ctx->rr[3] = 0x30;
1205 p_ctx->rr[4] = 0x30;
1206 p_ctx->rr[5] = 0x30;
1207 p_ctx->rr[7] = 0x30;
1208
1209 /*Initilize branch register 0*/
1210 p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
1211
1212 vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
1213 vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
1214 vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
1215
1216 hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
1217 vcpu->arch.hlt_timer.function = hlt_timer_fn;
1218
1219 vcpu->arch.last_run_cpu = -1;
1220 vcpu->arch.vpd = (struct vpd *)VPD_BASE(vcpu->vcpu_id);
1221 vcpu->arch.vsa_base = kvm_vsa_base;
1222 vcpu->arch.__gp = kvm_vmm_gp;
1223 vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
1224 vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_BASE(vcpu->vcpu_id);
1225 vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(vcpu->vcpu_id);
1226 init_ptce_info(vcpu);
1227
1228 r = 0;
1229 out:
1230 return r;
1231 }
1232
1233 static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
1234 {
1235 unsigned long psr;
1236 int r;
1237
1238 local_irq_save(psr);
1239 r = kvm_insert_vmm_mapping(vcpu);
1240 if (r)
1241 goto fail;
1242 r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1243 if (r)
1244 goto fail;
1245
1246 r = vti_init_vpd(vcpu);
1247 if (r) {
1248 printk(KERN_DEBUG"kvm: vpd init error!!\n");
1249 goto uninit;
1250 }
1251
1252 r = vti_create_vp(vcpu);
1253 if (r)
1254 goto uninit;
1255
1256 kvm_purge_vmm_mapping(vcpu);
1257 local_irq_restore(psr);
1258
1259 return 0;
1260 uninit:
1261 kvm_vcpu_uninit(vcpu);
1262 fail:
1263 local_irq_restore(psr);
1264 return r;
1265 }
1266
1267 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1268 unsigned int id)
1269 {
1270 struct kvm_vcpu *vcpu;
1271 unsigned long vm_base = kvm->arch.vm_base;
1272 int r;
1273 int cpu;
1274
1275 BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
1276
1277 r = -EINVAL;
1278 if (id >= KVM_MAX_VCPUS) {
1279 printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
1280 KVM_MAX_VCPUS);
1281 goto fail;
1282 }
1283
1284 r = -ENOMEM;
1285 if (!vm_base) {
1286 printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1287 goto fail;
1288 }
1289 vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
1290 vcpu_data[id].vcpu_struct));
1291 vcpu->kvm = kvm;
1292
1293 cpu = get_cpu();
1294 vti_vcpu_load(vcpu, cpu);
1295 r = vti_vcpu_setup(vcpu, id);
1296 put_cpu();
1297
1298 if (r) {
1299 printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1300 goto fail;
1301 }
1302
1303 kvm->arch.online_vcpus++;
1304
1305 return vcpu;
1306 fail:
1307 return ERR_PTR(r);
1308 }
1309
1310 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1311 {
1312 return 0;
1313 }
1314
1315 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1316 {
1317 return -EINVAL;
1318 }
1319
1320 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1321 {
1322 return -EINVAL;
1323 }
1324
1325 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1326 struct kvm_guest_debug *dbg)
1327 {
1328 return -EINVAL;
1329 }
1330
1331 static void free_kvm(struct kvm *kvm)
1332 {
1333 unsigned long vm_base = kvm->arch.vm_base;
1334
1335 if (vm_base) {
1336 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1337 free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1338 }
1339
1340 }
1341
1342 static void kvm_release_vm_pages(struct kvm *kvm)
1343 {
1344 struct kvm_memory_slot *memslot;
1345 int i, j;
1346 unsigned long base_gfn;
1347
1348 for (i = 0; i < kvm->nmemslots; i++) {
1349 memslot = &kvm->memslots[i];
1350 base_gfn = memslot->base_gfn;
1351
1352 for (j = 0; j < memslot->npages; j++) {
1353 if (memslot->rmap[j])
1354 put_page((struct page *)memslot->rmap[j]);
1355 }
1356 }
1357 }
1358
1359 void kvm_arch_sync_events(struct kvm *kvm)
1360 {
1361 }
1362
1363 void kvm_arch_destroy_vm(struct kvm *kvm)
1364 {
1365 kvm_iommu_unmap_guest(kvm);
1366 #ifdef KVM_CAP_DEVICE_ASSIGNMENT
1367 kvm_free_all_assigned_devices(kvm);
1368 #endif
1369 kfree(kvm->arch.vioapic);
1370 kvm_release_vm_pages(kvm);
1371 kvm_free_physmem(kvm);
1372 free_kvm(kvm);
1373 }
1374
1375 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1376 {
1377 }
1378
1379 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1380 {
1381 if (cpu != vcpu->cpu) {
1382 vcpu->cpu = cpu;
1383 if (vcpu->arch.ht_active)
1384 kvm_migrate_hlt_timer(vcpu);
1385 }
1386 }
1387
1388 #define SAVE_REGS(_x) regs->_x = vcpu->arch._x
1389
1390 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1391 {
1392 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1393 int i;
1394
1395 vcpu_load(vcpu);
1396
1397 for (i = 0; i < 16; i++) {
1398 regs->vpd.vgr[i] = vpd->vgr[i];
1399 regs->vpd.vbgr[i] = vpd->vbgr[i];
1400 }
1401 for (i = 0; i < 128; i++)
1402 regs->vpd.vcr[i] = vpd->vcr[i];
1403 regs->vpd.vhpi = vpd->vhpi;
1404 regs->vpd.vnat = vpd->vnat;
1405 regs->vpd.vbnat = vpd->vbnat;
1406 regs->vpd.vpsr = vpd->vpsr;
1407 regs->vpd.vpr = vpd->vpr;
1408
1409 memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
1410
1411 SAVE_REGS(mp_state);
1412 SAVE_REGS(vmm_rr);
1413 memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1414 memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1415 SAVE_REGS(itr_regions);
1416 SAVE_REGS(dtr_regions);
1417 SAVE_REGS(tc_regions);
1418 SAVE_REGS(irq_check);
1419 SAVE_REGS(itc_check);
1420 SAVE_REGS(timer_check);
1421 SAVE_REGS(timer_pending);
1422 SAVE_REGS(last_itc);
1423 for (i = 0; i < 8; i++) {
1424 regs->vrr[i] = vcpu->arch.vrr[i];
1425 regs->ibr[i] = vcpu->arch.ibr[i];
1426 regs->dbr[i] = vcpu->arch.dbr[i];
1427 }
1428 for (i = 0; i < 4; i++)
1429 regs->insvc[i] = vcpu->arch.insvc[i];
1430 regs->saved_itc = vcpu->arch.itc_offset + ia64_getreg(_IA64_REG_AR_ITC);
1431 SAVE_REGS(xtp);
1432 SAVE_REGS(metaphysical_rr0);
1433 SAVE_REGS(metaphysical_rr4);
1434 SAVE_REGS(metaphysical_saved_rr0);
1435 SAVE_REGS(metaphysical_saved_rr4);
1436 SAVE_REGS(fp_psr);
1437 SAVE_REGS(saved_gp);
1438
1439 vcpu_put(vcpu);
1440 return 0;
1441 }
1442
1443 int kvm_arch_vcpu_ioctl_get_stack(struct kvm_vcpu *vcpu,
1444 struct kvm_ia64_vcpu_stack *stack)
1445 {
1446 memcpy(stack, vcpu, sizeof(struct kvm_ia64_vcpu_stack));
1447 return 0;
1448 }
1449
1450 int kvm_arch_vcpu_ioctl_set_stack(struct kvm_vcpu *vcpu,
1451 struct kvm_ia64_vcpu_stack *stack)
1452 {
1453 memcpy(vcpu + 1, &stack->stack[0] + sizeof(struct kvm_vcpu),
1454 sizeof(struct kvm_ia64_vcpu_stack) - sizeof(struct kvm_vcpu));
1455
1456 vcpu->arch.exit_data = ((struct kvm_vcpu *)stack)->arch.exit_data;
1457 return 0;
1458 }
1459
1460 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1461 {
1462
1463 hrtimer_cancel(&vcpu->arch.hlt_timer);
1464 kfree(vcpu->arch.apic);
1465 }
1466
1467
1468 long kvm_arch_vcpu_ioctl(struct file *filp,
1469 unsigned int ioctl, unsigned long arg)
1470 {
1471 struct kvm_vcpu *vcpu = filp->private_data;
1472 void __user *argp = (void __user *)arg;
1473 struct kvm_ia64_vcpu_stack *stack = NULL;
1474 long r;
1475
1476 switch (ioctl) {
1477 case KVM_IA64_VCPU_GET_STACK: {
1478 struct kvm_ia64_vcpu_stack __user *user_stack;
1479 void __user *first_p = argp;
1480
1481 r = -EFAULT;
1482 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1483 goto out;
1484
1485 if (!access_ok(VERIFY_WRITE, user_stack,
1486 sizeof(struct kvm_ia64_vcpu_stack))) {
1487 printk(KERN_INFO "KVM_IA64_VCPU_GET_STACK: "
1488 "Illegal user destination address for stack\n");
1489 goto out;
1490 }
1491 stack = kzalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1492 if (!stack) {
1493 r = -ENOMEM;
1494 goto out;
1495 }
1496
1497 r = kvm_arch_vcpu_ioctl_get_stack(vcpu, stack);
1498 if (r)
1499 goto out;
1500
1501 if (copy_to_user(user_stack, stack,
1502 sizeof(struct kvm_ia64_vcpu_stack)))
1503 goto out;
1504
1505 break;
1506 }
1507 case KVM_IA64_VCPU_SET_STACK: {
1508 struct kvm_ia64_vcpu_stack __user *user_stack;
1509 void __user *first_p = argp;
1510
1511 r = -EFAULT;
1512 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1513 goto out;
1514
1515 if (!access_ok(VERIFY_READ, user_stack,
1516 sizeof(struct kvm_ia64_vcpu_stack))) {
1517 printk(KERN_INFO "KVM_IA64_VCPU_SET_STACK: "
1518 "Illegal user address for stack\n");
1519 goto out;
1520 }
1521 stack = kmalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1522 if (!stack) {
1523 r = -ENOMEM;
1524 goto out;
1525 }
1526 if (copy_from_user(stack, user_stack,
1527 sizeof(struct kvm_ia64_vcpu_stack)))
1528 goto out;
1529
1530 r = kvm_arch_vcpu_ioctl_set_stack(vcpu, stack);
1531 break;
1532 }
1533
1534 default:
1535 r = -EINVAL;
1536 }
1537
1538 out:
1539 kfree(stack);
1540 return r;
1541 }
1542
1543 int kvm_arch_set_memory_region(struct kvm *kvm,
1544 struct kvm_userspace_memory_region *mem,
1545 struct kvm_memory_slot old,
1546 int user_alloc)
1547 {
1548 unsigned long i;
1549 unsigned long pfn;
1550 int npages = mem->memory_size >> PAGE_SHIFT;
1551 struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
1552 unsigned long base_gfn = memslot->base_gfn;
1553
1554 if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
1555 return -ENOMEM;
1556
1557 for (i = 0; i < npages; i++) {
1558 pfn = gfn_to_pfn(kvm, base_gfn + i);
1559 if (!kvm_is_mmio_pfn(pfn)) {
1560 kvm_set_pmt_entry(kvm, base_gfn + i,
1561 pfn << PAGE_SHIFT,
1562 _PAGE_AR_RWX | _PAGE_MA_WB);
1563 memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1564 } else {
1565 kvm_set_pmt_entry(kvm, base_gfn + i,
1566 GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1567 _PAGE_MA_UC);
1568 memslot->rmap[i] = 0;
1569 }
1570 }
1571
1572 return 0;
1573 }
1574
1575 void kvm_arch_flush_shadow(struct kvm *kvm)
1576 {
1577 }
1578
1579 long kvm_arch_dev_ioctl(struct file *filp,
1580 unsigned int ioctl, unsigned long arg)
1581 {
1582 return -EINVAL;
1583 }
1584
1585 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1586 {
1587 kvm_vcpu_uninit(vcpu);
1588 }
1589
1590 static int vti_cpu_has_kvm_support(void)
1591 {
1592 long avail = 1, status = 1, control = 1;
1593 long ret;
1594
1595 ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1596 if (ret)
1597 goto out;
1598
1599 if (!(avail & PAL_PROC_VM_BIT))
1600 goto out;
1601
1602 printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1603
1604 ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1605 if (ret)
1606 goto out;
1607 printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1608
1609 if (!(vp_env_info & VP_OPCODE)) {
1610 printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1611 "vm_env_info:0x%lx\n", vp_env_info);
1612 }
1613
1614 return 1;
1615 out:
1616 return 0;
1617 }
1618
1619 static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1620 struct module *module)
1621 {
1622 unsigned long module_base;
1623 unsigned long vmm_size;
1624
1625 unsigned long vmm_offset, func_offset, fdesc_offset;
1626 struct fdesc *p_fdesc;
1627
1628 BUG_ON(!module);
1629
1630 if (!kvm_vmm_base) {
1631 printk("kvm: kvm area hasn't been initilized yet!!\n");
1632 return -EFAULT;
1633 }
1634
1635 /*Calculate new position of relocated vmm module.*/
1636 module_base = (unsigned long)module->module_core;
1637 vmm_size = module->core_size;
1638 if (unlikely(vmm_size > KVM_VMM_SIZE))
1639 return -EFAULT;
1640
1641 memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1642 kvm_flush_icache(kvm_vmm_base, vmm_size);
1643
1644 /*Recalculate kvm_vmm_info based on new VMM*/
1645 vmm_offset = vmm_info->vmm_ivt - module_base;
1646 kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1647 printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1648 kvm_vmm_info->vmm_ivt);
1649
1650 fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1651 kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1652 fdesc_offset);
1653 func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1654 p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1655 p_fdesc->ip = KVM_VMM_BASE + func_offset;
1656 p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1657
1658 printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1659 KVM_VMM_BASE+func_offset);
1660
1661 fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1662 kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1663 fdesc_offset);
1664 func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1665 p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1666 p_fdesc->ip = KVM_VMM_BASE + func_offset;
1667 p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1668
1669 kvm_vmm_gp = p_fdesc->gp;
1670
1671 printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1672 kvm_vmm_info->vmm_entry);
1673 printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1674 KVM_VMM_BASE + func_offset);
1675
1676 return 0;
1677 }
1678
1679 int kvm_arch_init(void *opaque)
1680 {
1681 int r;
1682 struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1683
1684 if (!vti_cpu_has_kvm_support()) {
1685 printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1686 r = -EOPNOTSUPP;
1687 goto out;
1688 }
1689
1690 if (kvm_vmm_info) {
1691 printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1692 r = -EEXIST;
1693 goto out;
1694 }
1695
1696 r = -ENOMEM;
1697 kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1698 if (!kvm_vmm_info)
1699 goto out;
1700
1701 if (kvm_alloc_vmm_area())
1702 goto out_free0;
1703
1704 r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1705 if (r)
1706 goto out_free1;
1707
1708 return 0;
1709
1710 out_free1:
1711 kvm_free_vmm_area();
1712 out_free0:
1713 kfree(kvm_vmm_info);
1714 out:
1715 return r;
1716 }
1717
1718 void kvm_arch_exit(void)
1719 {
1720 kvm_free_vmm_area();
1721 kfree(kvm_vmm_info);
1722 kvm_vmm_info = NULL;
1723 }
1724
1725 static int kvm_ia64_sync_dirty_log(struct kvm *kvm,
1726 struct kvm_dirty_log *log)
1727 {
1728 struct kvm_memory_slot *memslot;
1729 int r, i;
1730 long n, base;
1731 unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
1732 offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
1733
1734 r = -EINVAL;
1735 if (log->slot >= KVM_MEMORY_SLOTS)
1736 goto out;
1737
1738 memslot = &kvm->memslots[log->slot];
1739 r = -ENOENT;
1740 if (!memslot->dirty_bitmap)
1741 goto out;
1742
1743 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1744 base = memslot->base_gfn / BITS_PER_LONG;
1745
1746 for (i = 0; i < n/sizeof(long); ++i) {
1747 memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1748 dirty_bitmap[base + i] = 0;
1749 }
1750 r = 0;
1751 out:
1752 return r;
1753 }
1754
1755 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1756 struct kvm_dirty_log *log)
1757 {
1758 int r;
1759 int n;
1760 struct kvm_memory_slot *memslot;
1761 int is_dirty = 0;
1762
1763 spin_lock(&kvm->arch.dirty_log_lock);
1764
1765 r = kvm_ia64_sync_dirty_log(kvm, log);
1766 if (r)
1767 goto out;
1768
1769 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1770 if (r)
1771 goto out;
1772
1773 /* If nothing is dirty, don't bother messing with page tables. */
1774 if (is_dirty) {
1775 kvm_flush_remote_tlbs(kvm);
1776 memslot = &kvm->memslots[log->slot];
1777 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1778 memset(memslot->dirty_bitmap, 0, n);
1779 }
1780 r = 0;
1781 out:
1782 spin_unlock(&kvm->arch.dirty_log_lock);
1783 return r;
1784 }
1785
1786 int kvm_arch_hardware_setup(void)
1787 {
1788 return 0;
1789 }
1790
1791 void kvm_arch_hardware_unsetup(void)
1792 {
1793 }
1794
1795 static void vcpu_kick_intr(void *info)
1796 {
1797 #ifdef DEBUG
1798 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
1799 printk(KERN_DEBUG"vcpu_kick_intr %p \n", vcpu);
1800 #endif
1801 }
1802
1803 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
1804 {
1805 int ipi_pcpu = vcpu->cpu;
1806 int cpu = get_cpu();
1807
1808 if (waitqueue_active(&vcpu->wq))
1809 wake_up_interruptible(&vcpu->wq);
1810
1811 if (vcpu->guest_mode && cpu != ipi_pcpu)
1812 smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0);
1813 put_cpu();
1814 }
1815
1816 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, u8 vec, u8 trig)
1817 {
1818
1819 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1820
1821 if (!test_and_set_bit(vec, &vpd->irr[0])) {
1822 vcpu->arch.irq_new_pending = 1;
1823 kvm_vcpu_kick(vcpu);
1824 return 1;
1825 }
1826 return 0;
1827 }
1828
1829 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1830 {
1831 return apic->vcpu->vcpu_id == dest;
1832 }
1833
1834 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1835 {
1836 return 0;
1837 }
1838
1839 struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector,
1840 unsigned long bitmap)
1841 {
1842 struct kvm_vcpu *lvcpu = kvm->vcpus[0];
1843 int i;
1844
1845 for (i = 1; i < kvm->arch.online_vcpus; i++) {
1846 if (!kvm->vcpus[i])
1847 continue;
1848 if (lvcpu->arch.xtp > kvm->vcpus[i]->arch.xtp)
1849 lvcpu = kvm->vcpus[i];
1850 }
1851
1852 return lvcpu;
1853 }
1854
1855 static int find_highest_bits(int *dat)
1856 {
1857 u32 bits, bitnum;
1858 int i;
1859
1860 /* loop for all 256 bits */
1861 for (i = 7; i >= 0 ; i--) {
1862 bits = dat[i];
1863 if (bits) {
1864 bitnum = fls(bits);
1865 return i * 32 + bitnum - 1;
1866 }
1867 }
1868
1869 return -1;
1870 }
1871
1872 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1873 {
1874 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1875
1876 if (vpd->irr[0] & (1UL << NMI_VECTOR))
1877 return NMI_VECTOR;
1878 if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1879 return ExtINT_VECTOR;
1880
1881 return find_highest_bits((int *)&vpd->irr[0]);
1882 }
1883
1884 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
1885 {
1886 if (kvm_highest_pending_irq(vcpu) != -1)
1887 return 1;
1888 return 0;
1889 }
1890
1891 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1892 {
1893 return vcpu->arch.timer_fired;
1894 }
1895
1896 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
1897 {
1898 return gfn;
1899 }
1900
1901 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1902 {
1903 return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE;
1904 }
1905
1906 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1907 struct kvm_mp_state *mp_state)
1908 {
1909 vcpu_load(vcpu);
1910 mp_state->mp_state = vcpu->arch.mp_state;
1911 vcpu_put(vcpu);
1912 return 0;
1913 }
1914
1915 static int vcpu_reset(struct kvm_vcpu *vcpu)
1916 {
1917 int r;
1918 long psr;
1919 local_irq_save(psr);
1920 r = kvm_insert_vmm_mapping(vcpu);
1921 if (r)
1922 goto fail;
1923
1924 vcpu->arch.launched = 0;
1925 kvm_arch_vcpu_uninit(vcpu);
1926 r = kvm_arch_vcpu_init(vcpu);
1927 if (r)
1928 goto fail;
1929
1930 kvm_purge_vmm_mapping(vcpu);
1931 r = 0;
1932 fail:
1933 local_irq_restore(psr);
1934 return r;
1935 }
1936
1937 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1938 struct kvm_mp_state *mp_state)
1939 {
1940 int r = 0;
1941
1942 vcpu_load(vcpu);
1943 vcpu->arch.mp_state = mp_state->mp_state;
1944 if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
1945 r = vcpu_reset(vcpu);
1946 vcpu_put(vcpu);
1947 return r;
1948 }
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