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added 2.6.29.6 aldebaran kernel
[nao-ulib.git] / kernel / 2.6.29.6-aldebaran-rt / arch / ia64 / kvm / kvm-ia64.c
blob28f982045f29c6c1623c2ac06e032e904efb0720
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(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
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_MAX_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_MAX_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 preempt_disable();
614 local_irq_disable();
615
616 if (signal_pending(current)) {
617 local_irq_enable();
618 preempt_enable();
619 r = -EINTR;
620 kvm_run->exit_reason = KVM_EXIT_INTR;
621 goto out;
622 }
623
624 vcpu->guest_mode = 1;
625 kvm_guest_enter();
626 down_read(&vcpu->kvm->slots_lock);
627 r = vti_vcpu_run(vcpu, kvm_run);
628 if (r < 0) {
629 local_irq_enable();
630 preempt_enable();
631 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
632 goto out;
633 }
634
635 vcpu->arch.launched = 1;
636 vcpu->guest_mode = 0;
637 local_irq_enable();
638
639 /*
640 * We must have an instruction between local_irq_enable() and
641 * kvm_guest_exit(), so the timer interrupt isn't delayed by
642 * the interrupt shadow. The stat.exits increment will do nicely.
643 * But we need to prevent reordering, hence this barrier():
644 */
645 barrier();
646 kvm_guest_exit();
647 up_read(&vcpu->kvm->slots_lock);
648 preempt_enable();
649
650 r = kvm_handle_exit(kvm_run, vcpu);
651
652 if (r > 0) {
653 if (!need_resched())
654 goto again;
655 }
656
657 out:
658 if (r > 0) {
659 kvm_resched(vcpu);
660 goto again;
661 }
662
663 return r;
664 }
665
666 static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
667 {
668 struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
669
670 if (!vcpu->mmio_is_write)
671 memcpy(&p->data, vcpu->mmio_data, 8);
672 p->state = STATE_IORESP_READY;
673 }
674
675 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
676 {
677 int r;
678 sigset_t sigsaved;
679
680 vcpu_load(vcpu);
681
682 if (vcpu->sigset_active)
683 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
684
685 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
686 kvm_vcpu_block(vcpu);
687 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
688 r = -EAGAIN;
689 goto out;
690 }
691
692 if (vcpu->mmio_needed) {
693 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
694 kvm_set_mmio_data(vcpu);
695 vcpu->mmio_read_completed = 1;
696 vcpu->mmio_needed = 0;
697 }
698 r = __vcpu_run(vcpu, kvm_run);
699 out:
700 if (vcpu->sigset_active)
701 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
702
703 vcpu_put(vcpu);
704 return r;
705 }
706
707 static struct kvm *kvm_alloc_kvm(void)
708 {
709
710 struct kvm *kvm;
711 uint64_t vm_base;
712
713 BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
714
715 vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
716
717 if (!vm_base)
718 return ERR_PTR(-ENOMEM);
719
720 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
721 kvm = (struct kvm *)(vm_base +
722 offsetof(struct kvm_vm_data, kvm_vm_struct));
723 kvm->arch.vm_base = vm_base;
724 printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
725
726 return kvm;
727 }
728
729 struct kvm_io_range {
730 unsigned long start;
731 unsigned long size;
732 unsigned long type;
733 };
734
735 static const struct kvm_io_range io_ranges[] = {
736 {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
737 {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
738 {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
739 {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
740 {PIB_START, PIB_SIZE, GPFN_PIB},
741 };
742
743 static void kvm_build_io_pmt(struct kvm *kvm)
744 {
745 unsigned long i, j;
746
747 /* Mark I/O ranges */
748 for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
749 i++) {
750 for (j = io_ranges[i].start;
751 j < io_ranges[i].start + io_ranges[i].size;
752 j += PAGE_SIZE)
753 kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
754 io_ranges[i].type, 0);
755 }
756
757 }
758
759 /*Use unused rids to virtualize guest rid.*/
760 #define GUEST_PHYSICAL_RR0 0x1739
761 #define GUEST_PHYSICAL_RR4 0x2739
762 #define VMM_INIT_RR 0x1660
763
764 static void kvm_init_vm(struct kvm *kvm)
765 {
766 BUG_ON(!kvm);
767
768 kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
769 kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
770 kvm->arch.vmm_init_rr = VMM_INIT_RR;
771
772 /*
773 *Fill P2M entries for MMIO/IO ranges
774 */
775 kvm_build_io_pmt(kvm);
776
777 INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
778
779 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
780 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
781 }
782
783 struct kvm *kvm_arch_create_vm(void)
784 {
785 struct kvm *kvm = kvm_alloc_kvm();
786
787 if (IS_ERR(kvm))
788 return ERR_PTR(-ENOMEM);
789 kvm_init_vm(kvm);
790
791 return kvm;
792
793 }
794
795 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
796 struct kvm_irqchip *chip)
797 {
798 int r;
799
800 r = 0;
801 switch (chip->chip_id) {
802 case KVM_IRQCHIP_IOAPIC:
803 memcpy(&chip->chip.ioapic, ioapic_irqchip(kvm),
804 sizeof(struct kvm_ioapic_state));
805 break;
806 default:
807 r = -EINVAL;
808 break;
809 }
810 return r;
811 }
812
813 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
814 {
815 int r;
816
817 r = 0;
818 switch (chip->chip_id) {
819 case KVM_IRQCHIP_IOAPIC:
820 memcpy(ioapic_irqchip(kvm),
821 &chip->chip.ioapic,
822 sizeof(struct kvm_ioapic_state));
823 break;
824 default:
825 r = -EINVAL;
826 break;
827 }
828 return r;
829 }
830
831 #define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
832
833 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
834 {
835 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
836 int i;
837
838 vcpu_load(vcpu);
839
840 for (i = 0; i < 16; i++) {
841 vpd->vgr[i] = regs->vpd.vgr[i];
842 vpd->vbgr[i] = regs->vpd.vbgr[i];
843 }
844 for (i = 0; i < 128; i++)
845 vpd->vcr[i] = regs->vpd.vcr[i];
846 vpd->vhpi = regs->vpd.vhpi;
847 vpd->vnat = regs->vpd.vnat;
848 vpd->vbnat = regs->vpd.vbnat;
849 vpd->vpsr = regs->vpd.vpsr;
850
851 vpd->vpr = regs->vpd.vpr;
852
853 memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
854
855 RESTORE_REGS(mp_state);
856 RESTORE_REGS(vmm_rr);
857 memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
858 memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
859 RESTORE_REGS(itr_regions);
860 RESTORE_REGS(dtr_regions);
861 RESTORE_REGS(tc_regions);
862 RESTORE_REGS(irq_check);
863 RESTORE_REGS(itc_check);
864 RESTORE_REGS(timer_check);
865 RESTORE_REGS(timer_pending);
866 RESTORE_REGS(last_itc);
867 for (i = 0; i < 8; i++) {
868 vcpu->arch.vrr[i] = regs->vrr[i];
869 vcpu->arch.ibr[i] = regs->ibr[i];
870 vcpu->arch.dbr[i] = regs->dbr[i];
871 }
872 for (i = 0; i < 4; i++)
873 vcpu->arch.insvc[i] = regs->insvc[i];
874 RESTORE_REGS(xtp);
875 RESTORE_REGS(metaphysical_rr0);
876 RESTORE_REGS(metaphysical_rr4);
877 RESTORE_REGS(metaphysical_saved_rr0);
878 RESTORE_REGS(metaphysical_saved_rr4);
879 RESTORE_REGS(fp_psr);
880 RESTORE_REGS(saved_gp);
881
882 vcpu->arch.irq_new_pending = 1;
883 vcpu->arch.itc_offset = regs->saved_itc - ia64_getreg(_IA64_REG_AR_ITC);
884 set_bit(KVM_REQ_RESUME, &vcpu->requests);
885
886 vcpu_put(vcpu);
887
888 return 0;
889 }
890
891 long kvm_arch_vm_ioctl(struct file *filp,
892 unsigned int ioctl, unsigned long arg)
893 {
894 struct kvm *kvm = filp->private_data;
895 void __user *argp = (void __user *)arg;
896 int r = -EINVAL;
897
898 switch (ioctl) {
899 case KVM_SET_MEMORY_REGION: {
900 struct kvm_memory_region kvm_mem;
901 struct kvm_userspace_memory_region kvm_userspace_mem;
902
903 r = -EFAULT;
904 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
905 goto out;
906 kvm_userspace_mem.slot = kvm_mem.slot;
907 kvm_userspace_mem.flags = kvm_mem.flags;
908 kvm_userspace_mem.guest_phys_addr =
909 kvm_mem.guest_phys_addr;
910 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
911 r = kvm_vm_ioctl_set_memory_region(kvm,
912 &kvm_userspace_mem, 0);
913 if (r)
914 goto out;
915 break;
916 }
917 case KVM_CREATE_IRQCHIP:
918 r = -EFAULT;
919 r = kvm_ioapic_init(kvm);
920 if (r)
921 goto out;
922 break;
923 case KVM_IRQ_LINE: {
924 struct kvm_irq_level irq_event;
925
926 r = -EFAULT;
927 if (copy_from_user(&irq_event, argp, sizeof irq_event))
928 goto out;
929 if (irqchip_in_kernel(kvm)) {
930 mutex_lock(&kvm->lock);
931 kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
932 irq_event.irq, irq_event.level);
933 mutex_unlock(&kvm->lock);
934 r = 0;
935 }
936 break;
937 }
938 case KVM_GET_IRQCHIP: {
939 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
940 struct kvm_irqchip chip;
941
942 r = -EFAULT;
943 if (copy_from_user(&chip, argp, sizeof chip))
944 goto out;
945 r = -ENXIO;
946 if (!irqchip_in_kernel(kvm))
947 goto out;
948 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
949 if (r)
950 goto out;
951 r = -EFAULT;
952 if (copy_to_user(argp, &chip, sizeof chip))
953 goto out;
954 r = 0;
955 break;
956 }
957 case KVM_SET_IRQCHIP: {
958 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
959 struct kvm_irqchip chip;
960
961 r = -EFAULT;
962 if (copy_from_user(&chip, argp, sizeof chip))
963 goto out;
964 r = -ENXIO;
965 if (!irqchip_in_kernel(kvm))
966 goto out;
967 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
968 if (r)
969 goto out;
970 r = 0;
971 break;
972 }
973 default:
974 ;
975 }
976 out:
977 return r;
978 }
979
980 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
981 struct kvm_sregs *sregs)
982 {
983 return -EINVAL;
984 }
985
986 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
987 struct kvm_sregs *sregs)
988 {
989 return -EINVAL;
990
991 }
992 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
993 struct kvm_translation *tr)
994 {
995
996 return -EINVAL;
997 }
998
999 static int kvm_alloc_vmm_area(void)
1000 {
1001 if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1002 kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1003 get_order(KVM_VMM_SIZE));
1004 if (!kvm_vmm_base)
1005 return -ENOMEM;
1006
1007 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1008 kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1009
1010 printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1011 kvm_vmm_base, kvm_vm_buffer);
1012 }
1013
1014 return 0;
1015 }
1016
1017 static void kvm_free_vmm_area(void)
1018 {
1019 if (kvm_vmm_base) {
1020 /*Zero this area before free to avoid bits leak!!*/
1021 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1022 free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1023 kvm_vmm_base = 0;
1024 kvm_vm_buffer = 0;
1025 kvm_vsa_base = 0;
1026 }
1027 }
1028
1029 static void vti_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1030 {
1031 }
1032
1033 static int vti_init_vpd(struct kvm_vcpu *vcpu)
1034 {
1035 int i;
1036 union cpuid3_t cpuid3;
1037 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1038
1039 if (IS_ERR(vpd))
1040 return PTR_ERR(vpd);
1041
1042 /* CPUID init */
1043 for (i = 0; i < 5; i++)
1044 vpd->vcpuid[i] = ia64_get_cpuid(i);
1045
1046 /* Limit the CPUID number to 5 */
1047 cpuid3.value = vpd->vcpuid[3];
1048 cpuid3.number = 4; /* 5 - 1 */
1049 vpd->vcpuid[3] = cpuid3.value;
1050
1051 /*Set vac and vdc fields*/
1052 vpd->vac.a_from_int_cr = 1;
1053 vpd->vac.a_to_int_cr = 1;
1054 vpd->vac.a_from_psr = 1;
1055 vpd->vac.a_from_cpuid = 1;
1056 vpd->vac.a_cover = 1;
1057 vpd->vac.a_bsw = 1;
1058 vpd->vac.a_int = 1;
1059 vpd->vdc.d_vmsw = 1;
1060
1061 /*Set virtual buffer*/
1062 vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
1063
1064 return 0;
1065 }
1066
1067 static int vti_create_vp(struct kvm_vcpu *vcpu)
1068 {
1069 long ret;
1070 struct vpd *vpd = vcpu->arch.vpd;
1071 unsigned long vmm_ivt;
1072
1073 vmm_ivt = kvm_vmm_info->vmm_ivt;
1074
1075 printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
1076
1077 ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
1078
1079 if (ret) {
1080 printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
1081 return -EINVAL;
1082 }
1083 return 0;
1084 }
1085
1086 static void init_ptce_info(struct kvm_vcpu *vcpu)
1087 {
1088 ia64_ptce_info_t ptce = {0};
1089
1090 ia64_get_ptce(&ptce);
1091 vcpu->arch.ptce_base = ptce.base;
1092 vcpu->arch.ptce_count[0] = ptce.count[0];
1093 vcpu->arch.ptce_count[1] = ptce.count[1];
1094 vcpu->arch.ptce_stride[0] = ptce.stride[0];
1095 vcpu->arch.ptce_stride[1] = ptce.stride[1];
1096 }
1097
1098 static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
1099 {
1100 struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
1101
1102 if (hrtimer_cancel(p_ht))
1103 hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
1104 }
1105
1106 static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
1107 {
1108 struct kvm_vcpu *vcpu;
1109 wait_queue_head_t *q;
1110
1111 vcpu = container_of(data, struct kvm_vcpu, arch.hlt_timer);
1112 q = &vcpu->wq;
1113
1114 if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
1115 goto out;
1116
1117 if (waitqueue_active(q))
1118 wake_up_interruptible(q);
1119
1120 out:
1121 vcpu->arch.timer_fired = 1;
1122 vcpu->arch.timer_check = 1;
1123 return HRTIMER_NORESTART;
1124 }
1125
1126 #define PALE_RESET_ENTRY 0x80000000ffffffb0UL
1127
1128 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1129 {
1130 struct kvm_vcpu *v;
1131 int r;
1132 int i;
1133 long itc_offset;
1134 struct kvm *kvm = vcpu->kvm;
1135 struct kvm_pt_regs *regs = vcpu_regs(vcpu);
1136
1137 union context *p_ctx = &vcpu->arch.guest;
1138 struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
1139
1140 /*Init vcpu context for first run.*/
1141 if (IS_ERR(vmm_vcpu))
1142 return PTR_ERR(vmm_vcpu);
1143
1144 if (vcpu->vcpu_id == 0) {
1145 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1146
1147 /*Set entry address for first run.*/
1148 regs->cr_iip = PALE_RESET_ENTRY;
1149
1150 /*Initialize itc offset for vcpus*/
1151 itc_offset = 0UL - ia64_getreg(_IA64_REG_AR_ITC);
1152 for (i = 0; i < KVM_MAX_VCPUS; i++) {
1153 v = (struct kvm_vcpu *)((char *)vcpu +
1154 sizeof(struct kvm_vcpu_data) * i);
1155 v->arch.itc_offset = itc_offset;
1156 v->arch.last_itc = 0;
1157 }
1158 } else
1159 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
1160
1161 r = -ENOMEM;
1162 vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
1163 if (!vcpu->arch.apic)
1164 goto out;
1165 vcpu->arch.apic->vcpu = vcpu;
1166
1167 p_ctx->gr[1] = 0;
1168 p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + KVM_STK_OFFSET);
1169 p_ctx->gr[13] = (unsigned long)vmm_vcpu;
1170 p_ctx->psr = 0x1008522000UL;
1171 p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
1172 p_ctx->caller_unat = 0;
1173 p_ctx->pr = 0x0;
1174 p_ctx->ar[36] = 0x0; /*unat*/
1175 p_ctx->ar[19] = 0x0; /*rnat*/
1176 p_ctx->ar[18] = (unsigned long)vmm_vcpu +
1177 ((sizeof(struct kvm_vcpu)+15) & ~15);
1178 p_ctx->ar[64] = 0x0; /*pfs*/
1179 p_ctx->cr[0] = 0x7e04UL;
1180 p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
1181 p_ctx->cr[8] = 0x3c;
1182
1183 /*Initilize region register*/
1184 p_ctx->rr[0] = 0x30;
1185 p_ctx->rr[1] = 0x30;
1186 p_ctx->rr[2] = 0x30;
1187 p_ctx->rr[3] = 0x30;
1188 p_ctx->rr[4] = 0x30;
1189 p_ctx->rr[5] = 0x30;
1190 p_ctx->rr[7] = 0x30;
1191
1192 /*Initilize branch register 0*/
1193 p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
1194
1195 vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
1196 vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
1197 vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
1198
1199 hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
1200 vcpu->arch.hlt_timer.function = hlt_timer_fn;
1201
1202 vcpu->arch.last_run_cpu = -1;
1203 vcpu->arch.vpd = (struct vpd *)VPD_BASE(vcpu->vcpu_id);
1204 vcpu->arch.vsa_base = kvm_vsa_base;
1205 vcpu->arch.__gp = kvm_vmm_gp;
1206 vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
1207 vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_BASE(vcpu->vcpu_id);
1208 vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(vcpu->vcpu_id);
1209 init_ptce_info(vcpu);
1210
1211 r = 0;
1212 out:
1213 return r;
1214 }
1215
1216 static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
1217 {
1218 unsigned long psr;
1219 int r;
1220
1221 local_irq_save(psr);
1222 r = kvm_insert_vmm_mapping(vcpu);
1223 if (r)
1224 goto fail;
1225 r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1226 if (r)
1227 goto fail;
1228
1229 r = vti_init_vpd(vcpu);
1230 if (r) {
1231 printk(KERN_DEBUG"kvm: vpd init error!!\n");
1232 goto uninit;
1233 }
1234
1235 r = vti_create_vp(vcpu);
1236 if (r)
1237 goto uninit;
1238
1239 kvm_purge_vmm_mapping(vcpu);
1240 local_irq_restore(psr);
1241
1242 return 0;
1243 uninit:
1244 kvm_vcpu_uninit(vcpu);
1245 fail:
1246 local_irq_restore(psr);
1247 return r;
1248 }
1249
1250 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1251 unsigned int id)
1252 {
1253 struct kvm_vcpu *vcpu;
1254 unsigned long vm_base = kvm->arch.vm_base;
1255 int r;
1256 int cpu;
1257
1258 BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
1259
1260 r = -EINVAL;
1261 if (id >= KVM_MAX_VCPUS) {
1262 printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
1263 KVM_MAX_VCPUS);
1264 goto fail;
1265 }
1266
1267 r = -ENOMEM;
1268 if (!vm_base) {
1269 printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1270 goto fail;
1271 }
1272 vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
1273 vcpu_data[id].vcpu_struct));
1274 vcpu->kvm = kvm;
1275
1276 cpu = get_cpu();
1277 vti_vcpu_load(vcpu, cpu);
1278 r = vti_vcpu_setup(vcpu, id);
1279 put_cpu();
1280
1281 if (r) {
1282 printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1283 goto fail;
1284 }
1285
1286 return vcpu;
1287 fail:
1288 return ERR_PTR(r);
1289 }
1290
1291 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1292 {
1293 return 0;
1294 }
1295
1296 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1297 {
1298 return -EINVAL;
1299 }
1300
1301 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1302 {
1303 return -EINVAL;
1304 }
1305
1306 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
1307 struct kvm_debug_guest *dbg)
1308 {
1309 return -EINVAL;
1310 }
1311
1312 static void free_kvm(struct kvm *kvm)
1313 {
1314 unsigned long vm_base = kvm->arch.vm_base;
1315
1316 if (vm_base) {
1317 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1318 free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1319 }
1320
1321 }
1322
1323 static void kvm_release_vm_pages(struct kvm *kvm)
1324 {
1325 struct kvm_memory_slot *memslot;
1326 int i, j;
1327 unsigned long base_gfn;
1328
1329 for (i = 0; i < kvm->nmemslots; i++) {
1330 memslot = &kvm->memslots[i];
1331 base_gfn = memslot->base_gfn;
1332
1333 for (j = 0; j < memslot->npages; j++) {
1334 if (memslot->rmap[j])
1335 put_page((struct page *)memslot->rmap[j]);
1336 }
1337 }
1338 }
1339
1340 void kvm_arch_sync_events(struct kvm *kvm)
1341 {
1342 }
1343
1344 void kvm_arch_destroy_vm(struct kvm *kvm)
1345 {
1346 kvm_iommu_unmap_guest(kvm);
1347 #ifdef KVM_CAP_DEVICE_ASSIGNMENT
1348 kvm_free_all_assigned_devices(kvm);
1349 #endif
1350 kfree(kvm->arch.vioapic);
1351 kvm_release_vm_pages(kvm);
1352 kvm_free_physmem(kvm);
1353 free_kvm(kvm);
1354 }
1355
1356 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1357 {
1358 }
1359
1360 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1361 {
1362 if (cpu != vcpu->cpu) {
1363 vcpu->cpu = cpu;
1364 if (vcpu->arch.ht_active)
1365 kvm_migrate_hlt_timer(vcpu);
1366 }
1367 }
1368
1369 #define SAVE_REGS(_x) regs->_x = vcpu->arch._x
1370
1371 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1372 {
1373 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1374 int i;
1375
1376 vcpu_load(vcpu);
1377
1378 for (i = 0; i < 16; i++) {
1379 regs->vpd.vgr[i] = vpd->vgr[i];
1380 regs->vpd.vbgr[i] = vpd->vbgr[i];
1381 }
1382 for (i = 0; i < 128; i++)
1383 regs->vpd.vcr[i] = vpd->vcr[i];
1384 regs->vpd.vhpi = vpd->vhpi;
1385 regs->vpd.vnat = vpd->vnat;
1386 regs->vpd.vbnat = vpd->vbnat;
1387 regs->vpd.vpsr = vpd->vpsr;
1388 regs->vpd.vpr = vpd->vpr;
1389
1390 memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
1391
1392 SAVE_REGS(mp_state);
1393 SAVE_REGS(vmm_rr);
1394 memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1395 memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1396 SAVE_REGS(itr_regions);
1397 SAVE_REGS(dtr_regions);
1398 SAVE_REGS(tc_regions);
1399 SAVE_REGS(irq_check);
1400 SAVE_REGS(itc_check);
1401 SAVE_REGS(timer_check);
1402 SAVE_REGS(timer_pending);
1403 SAVE_REGS(last_itc);
1404 for (i = 0; i < 8; i++) {
1405 regs->vrr[i] = vcpu->arch.vrr[i];
1406 regs->ibr[i] = vcpu->arch.ibr[i];
1407 regs->dbr[i] = vcpu->arch.dbr[i];
1408 }
1409 for (i = 0; i < 4; i++)
1410 regs->insvc[i] = vcpu->arch.insvc[i];
1411 regs->saved_itc = vcpu->arch.itc_offset + ia64_getreg(_IA64_REG_AR_ITC);
1412 SAVE_REGS(xtp);
1413 SAVE_REGS(metaphysical_rr0);
1414 SAVE_REGS(metaphysical_rr4);
1415 SAVE_REGS(metaphysical_saved_rr0);
1416 SAVE_REGS(metaphysical_saved_rr4);
1417 SAVE_REGS(fp_psr);
1418 SAVE_REGS(saved_gp);
1419
1420 vcpu_put(vcpu);
1421 return 0;
1422 }
1423
1424 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1425 {
1426
1427 hrtimer_cancel(&vcpu->arch.hlt_timer);
1428 kfree(vcpu->arch.apic);
1429 }
1430
1431
1432 long kvm_arch_vcpu_ioctl(struct file *filp,
1433 unsigned int ioctl, unsigned long arg)
1434 {
1435 return -EINVAL;
1436 }
1437
1438 int kvm_arch_set_memory_region(struct kvm *kvm,
1439 struct kvm_userspace_memory_region *mem,
1440 struct kvm_memory_slot old,
1441 int user_alloc)
1442 {
1443 unsigned long i;
1444 unsigned long pfn;
1445 int npages = mem->memory_size >> PAGE_SHIFT;
1446 struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
1447 unsigned long base_gfn = memslot->base_gfn;
1448
1449 if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
1450 return -ENOMEM;
1451
1452 for (i = 0; i < npages; i++) {
1453 pfn = gfn_to_pfn(kvm, base_gfn + i);
1454 if (!kvm_is_mmio_pfn(pfn)) {
1455 kvm_set_pmt_entry(kvm, base_gfn + i,
1456 pfn << PAGE_SHIFT,
1457 _PAGE_AR_RWX | _PAGE_MA_WB);
1458 memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1459 } else {
1460 kvm_set_pmt_entry(kvm, base_gfn + i,
1461 GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1462 _PAGE_MA_UC);
1463 memslot->rmap[i] = 0;
1464 }
1465 }
1466
1467 return 0;
1468 }
1469
1470 void kvm_arch_flush_shadow(struct kvm *kvm)
1471 {
1472 }
1473
1474 long kvm_arch_dev_ioctl(struct file *filp,
1475 unsigned int ioctl, unsigned long arg)
1476 {
1477 return -EINVAL;
1478 }
1479
1480 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1481 {
1482 kvm_vcpu_uninit(vcpu);
1483 }
1484
1485 static int vti_cpu_has_kvm_support(void)
1486 {
1487 long avail = 1, status = 1, control = 1;
1488 long ret;
1489
1490 ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1491 if (ret)
1492 goto out;
1493
1494 if (!(avail & PAL_PROC_VM_BIT))
1495 goto out;
1496
1497 printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1498
1499 ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1500 if (ret)
1501 goto out;
1502 printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1503
1504 if (!(vp_env_info & VP_OPCODE)) {
1505 printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1506 "vm_env_info:0x%lx\n", vp_env_info);
1507 }
1508
1509 return 1;
1510 out:
1511 return 0;
1512 }
1513
1514 static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1515 struct module *module)
1516 {
1517 unsigned long module_base;
1518 unsigned long vmm_size;
1519
1520 unsigned long vmm_offset, func_offset, fdesc_offset;
1521 struct fdesc *p_fdesc;
1522
1523 BUG_ON(!module);
1524
1525 if (!kvm_vmm_base) {
1526 printk("kvm: kvm area hasn't been initilized yet!!\n");
1527 return -EFAULT;
1528 }
1529
1530 /*Calculate new position of relocated vmm module.*/
1531 module_base = (unsigned long)module->module_core;
1532 vmm_size = module->core_size;
1533 if (unlikely(vmm_size > KVM_VMM_SIZE))
1534 return -EFAULT;
1535
1536 memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1537 kvm_flush_icache(kvm_vmm_base, vmm_size);
1538
1539 /*Recalculate kvm_vmm_info based on new VMM*/
1540 vmm_offset = vmm_info->vmm_ivt - module_base;
1541 kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1542 printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1543 kvm_vmm_info->vmm_ivt);
1544
1545 fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1546 kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1547 fdesc_offset);
1548 func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1549 p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1550 p_fdesc->ip = KVM_VMM_BASE + func_offset;
1551 p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1552
1553 printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1554 KVM_VMM_BASE+func_offset);
1555
1556 fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1557 kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1558 fdesc_offset);
1559 func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1560 p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1561 p_fdesc->ip = KVM_VMM_BASE + func_offset;
1562 p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1563
1564 kvm_vmm_gp = p_fdesc->gp;
1565
1566 printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1567 kvm_vmm_info->vmm_entry);
1568 printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1569 KVM_VMM_BASE + func_offset);
1570
1571 return 0;
1572 }
1573
1574 int kvm_arch_init(void *opaque)
1575 {
1576 int r;
1577 struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1578
1579 if (!vti_cpu_has_kvm_support()) {
1580 printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1581 r = -EOPNOTSUPP;
1582 goto out;
1583 }
1584
1585 if (kvm_vmm_info) {
1586 printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1587 r = -EEXIST;
1588 goto out;
1589 }
1590
1591 r = -ENOMEM;
1592 kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1593 if (!kvm_vmm_info)
1594 goto out;
1595
1596 if (kvm_alloc_vmm_area())
1597 goto out_free0;
1598
1599 r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1600 if (r)
1601 goto out_free1;
1602
1603 return 0;
1604
1605 out_free1:
1606 kvm_free_vmm_area();
1607 out_free0:
1608 kfree(kvm_vmm_info);
1609 out:
1610 return r;
1611 }
1612
1613 void kvm_arch_exit(void)
1614 {
1615 kvm_free_vmm_area();
1616 kfree(kvm_vmm_info);
1617 kvm_vmm_info = NULL;
1618 }
1619
1620 static int kvm_ia64_sync_dirty_log(struct kvm *kvm,
1621 struct kvm_dirty_log *log)
1622 {
1623 struct kvm_memory_slot *memslot;
1624 int r, i;
1625 long n, base;
1626 unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
1627 offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
1628
1629 r = -EINVAL;
1630 if (log->slot >= KVM_MEMORY_SLOTS)
1631 goto out;
1632
1633 memslot = &kvm->memslots[log->slot];
1634 r = -ENOENT;
1635 if (!memslot->dirty_bitmap)
1636 goto out;
1637
1638 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1639 base = memslot->base_gfn / BITS_PER_LONG;
1640
1641 for (i = 0; i < n/sizeof(long); ++i) {
1642 memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1643 dirty_bitmap[base + i] = 0;
1644 }
1645 r = 0;
1646 out:
1647 return r;
1648 }
1649
1650 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1651 struct kvm_dirty_log *log)
1652 {
1653 int r;
1654 int n;
1655 struct kvm_memory_slot *memslot;
1656 int is_dirty = 0;
1657
1658 spin_lock(&kvm->arch.dirty_log_lock);
1659
1660 r = kvm_ia64_sync_dirty_log(kvm, log);
1661 if (r)
1662 goto out;
1663
1664 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1665 if (r)
1666 goto out;
1667
1668 /* If nothing is dirty, don't bother messing with page tables. */
1669 if (is_dirty) {
1670 kvm_flush_remote_tlbs(kvm);
1671 memslot = &kvm->memslots[log->slot];
1672 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1673 memset(memslot->dirty_bitmap, 0, n);
1674 }
1675 r = 0;
1676 out:
1677 spin_unlock(&kvm->arch.dirty_log_lock);
1678 return r;
1679 }
1680
1681 int kvm_arch_hardware_setup(void)
1682 {
1683 return 0;
1684 }
1685
1686 void kvm_arch_hardware_unsetup(void)
1687 {
1688 }
1689
1690 static void vcpu_kick_intr(void *info)
1691 {
1692 #ifdef DEBUG
1693 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
1694 printk(KERN_DEBUG"vcpu_kick_intr %p \n", vcpu);
1695 #endif
1696 }
1697
1698 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
1699 {
1700 int ipi_pcpu = vcpu->cpu;
1701 int cpu = get_cpu();
1702
1703 if (waitqueue_active(&vcpu->wq))
1704 wake_up_interruptible(&vcpu->wq);
1705
1706 if (vcpu->guest_mode && cpu != ipi_pcpu)
1707 smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0);
1708 put_cpu();
1709 }
1710
1711 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, u8 vec, u8 trig)
1712 {
1713
1714 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1715
1716 if (!test_and_set_bit(vec, &vpd->irr[0])) {
1717 vcpu->arch.irq_new_pending = 1;
1718 kvm_vcpu_kick(vcpu);
1719 return 1;
1720 }
1721 return 0;
1722 }
1723
1724 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1725 {
1726 return apic->vcpu->vcpu_id == dest;
1727 }
1728
1729 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1730 {
1731 return 0;
1732 }
1733
1734 struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector,
1735 unsigned long bitmap)
1736 {
1737 struct kvm_vcpu *lvcpu = kvm->vcpus[0];
1738 int i;
1739
1740 for (i = 1; i < KVM_MAX_VCPUS; i++) {
1741 if (!kvm->vcpus[i])
1742 continue;
1743 if (lvcpu->arch.xtp > kvm->vcpus[i]->arch.xtp)
1744 lvcpu = kvm->vcpus[i];
1745 }
1746
1747 return lvcpu;
1748 }
1749
1750 static int find_highest_bits(int *dat)
1751 {
1752 u32 bits, bitnum;
1753 int i;
1754
1755 /* loop for all 256 bits */
1756 for (i = 7; i >= 0 ; i--) {
1757 bits = dat[i];
1758 if (bits) {
1759 bitnum = fls(bits);
1760 return i * 32 + bitnum - 1;
1761 }
1762 }
1763
1764 return -1;
1765 }
1766
1767 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1768 {
1769 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1770
1771 if (vpd->irr[0] & (1UL << NMI_VECTOR))
1772 return NMI_VECTOR;
1773 if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1774 return ExtINT_VECTOR;
1775
1776 return find_highest_bits((int *)&vpd->irr[0]);
1777 }
1778
1779 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
1780 {
1781 if (kvm_highest_pending_irq(vcpu) != -1)
1782 return 1;
1783 return 0;
1784 }
1785
1786 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1787 {
1788 return vcpu->arch.timer_fired;
1789 }
1790
1791 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
1792 {
1793 return gfn;
1794 }
1795
1796 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1797 {
1798 return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE;
1799 }
1800
1801 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1802 struct kvm_mp_state *mp_state)
1803 {
1804 vcpu_load(vcpu);
1805 mp_state->mp_state = vcpu->arch.mp_state;
1806 vcpu_put(vcpu);
1807 return 0;
1808 }
1809
1810 static int vcpu_reset(struct kvm_vcpu *vcpu)
1811 {
1812 int r;
1813 long psr;
1814 local_irq_save(psr);
1815 r = kvm_insert_vmm_mapping(vcpu);
1816 if (r)
1817 goto fail;
1818
1819 vcpu->arch.launched = 0;
1820 kvm_arch_vcpu_uninit(vcpu);
1821 r = kvm_arch_vcpu_init(vcpu);
1822 if (r)
1823 goto fail;
1824
1825 kvm_purge_vmm_mapping(vcpu);
1826 r = 0;
1827 fail:
1828 local_irq_restore(psr);
1829 return r;
1830 }
1831
1832 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1833 struct kvm_mp_state *mp_state)
1834 {
1835 int r = 0;
1836
1837 vcpu_load(vcpu);
1838 vcpu->arch.mp_state = mp_state->mp_state;
1839 if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
1840 r = vcpu_reset(vcpu);
1841 vcpu_put(vcpu);
1842 return r;
1843 }
Nao low-level kernelspace/userspace library that runs on our robots, Nao-Team HTWK