?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Merge commit 'linus/master' into merge-linus
[linux-2.6/zen-sources.git] / arch / ia64 / kvm / kvm-ia64.c
bloba312c9e9b9efa2ecd194aa7f88a98a233749dbf6
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/intel-iommu.h>
35
36 #include <asm/pgtable.h>
37 #include <asm/gcc_intrin.h>
38 #include <asm/pal.h>
39 #include <asm/cacheflush.h>
40 #include <asm/div64.h>
41 #include <asm/tlb.h>
42 #include <asm/elf.h>
43
44 #include "misc.h"
45 #include "vti.h"
46 #include "iodev.h"
47 #include "ioapic.h"
48 #include "lapic.h"
49 #include "irq.h"
50
51 static unsigned long kvm_vmm_base;
52 static unsigned long kvm_vsa_base;
53 static unsigned long kvm_vm_buffer;
54 static unsigned long kvm_vm_buffer_size;
55 unsigned long kvm_vmm_gp;
56
57 static long vp_env_info;
58
59 static struct kvm_vmm_info *kvm_vmm_info;
60
61 static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu);
62
63 struct kvm_stats_debugfs_item debugfs_entries[] = {
64 { NULL }
65 };
66
67 static void kvm_flush_icache(unsigned long start, unsigned long len)
68 {
69 int l;
70
71 for (l = 0; l < (len + 32); l += 32)
72 ia64_fc(start + l);
73
74 ia64_sync_i();
75 ia64_srlz_i();
76 }
77
78 static void kvm_flush_tlb_all(void)
79 {
80 unsigned long i, j, count0, count1, stride0, stride1, addr;
81 long flags;
82
83 addr = local_cpu_data->ptce_base;
84 count0 = local_cpu_data->ptce_count[0];
85 count1 = local_cpu_data->ptce_count[1];
86 stride0 = local_cpu_data->ptce_stride[0];
87 stride1 = local_cpu_data->ptce_stride[1];
88
89 local_irq_save(flags);
90 for (i = 0; i < count0; ++i) {
91 for (j = 0; j < count1; ++j) {
92 ia64_ptce(addr);
93 addr += stride1;
94 }
95 addr += stride0;
96 }
97 local_irq_restore(flags);
98 ia64_srlz_i(); /* srlz.i implies srlz.d */
99 }
100
101 long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler)
102 {
103 struct ia64_pal_retval iprv;
104
105 PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva,
106 (u64)opt_handler);
107
108 return iprv.status;
109 }
110
111 static DEFINE_SPINLOCK(vp_lock);
112
113 void kvm_arch_hardware_enable(void *garbage)
114 {
115 long status;
116 long tmp_base;
117 unsigned long pte;
118 unsigned long saved_psr;
119 int slot;
120
121 pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
122 PAGE_KERNEL));
123 local_irq_save(saved_psr);
124 slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
125 local_irq_restore(saved_psr);
126 if (slot < 0)
127 return;
128
129 spin_lock(&vp_lock);
130 status = ia64_pal_vp_init_env(kvm_vsa_base ?
131 VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
132 __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
133 if (status != 0) {
134 printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
135 return ;
136 }
137
138 if (!kvm_vsa_base) {
139 kvm_vsa_base = tmp_base;
140 printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
141 }
142 spin_unlock(&vp_lock);
143 ia64_ptr_entry(0x3, slot);
144 }
145
146 void kvm_arch_hardware_disable(void *garbage)
147 {
148
149 long status;
150 int slot;
151 unsigned long pte;
152 unsigned long saved_psr;
153 unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
154
155 pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
156 PAGE_KERNEL));
157
158 local_irq_save(saved_psr);
159 slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
160 local_irq_restore(saved_psr);
161 if (slot < 0)
162 return;
163
164 status = ia64_pal_vp_exit_env(host_iva);
165 if (status)
166 printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
167 status);
168 ia64_ptr_entry(0x3, slot);
169 }
170
171 void kvm_arch_check_processor_compat(void *rtn)
172 {
173 *(int *)rtn = 0;
174 }
175
176 int kvm_dev_ioctl_check_extension(long ext)
177 {
178
179 int r;
180
181 switch (ext) {
182 case KVM_CAP_IRQCHIP:
183 case KVM_CAP_USER_MEMORY:
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 = intel_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 call_data.ptc_g_data = p->u.ptc_g_data;
389
390 for (i = 0; i < KVM_MAX_VCPUS; i++) {
391 if (!kvm->vcpus[i] || kvm->vcpus[i]->arch.mp_state ==
392 KVM_MP_STATE_UNINITIALIZED ||
393 vcpu == kvm->vcpus[i])
394 continue;
395
396 if (waitqueue_active(&kvm->vcpus[i]->wq))
397 wake_up_interruptible(&kvm->vcpus[i]->wq);
398
399 if (kvm->vcpus[i]->cpu != -1) {
400 call_data.vcpu = kvm->vcpus[i];
401 smp_call_function_single(kvm->vcpus[i]->cpu,
402 vcpu_global_purge, &call_data, 1);
403 } else
404 printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
405
406 }
407 return 1;
408 }
409
410 static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
411 {
412 return 1;
413 }
414
415 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
416 {
417
418 ktime_t kt;
419 long itc_diff;
420 unsigned long vcpu_now_itc;
421
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 vcpu_now_itc = ia64_getreg(_IA64_REG_AR_ITC) + vcpu->arch.itc_offset;
428
429 if (time_after(vcpu_now_itc, vpd->itm)) {
430 vcpu->arch.timer_check = 1;
431 return 1;
432 }
433 itc_diff = vpd->itm - vcpu_now_itc;
434 if (itc_diff < 0)
435 itc_diff = -itc_diff;
436
437 expires = div64_u64(itc_diff, cyc_per_usec);
438 kt = ktime_set(0, 1000 * expires);
439 vcpu->arch.ht_active = 1;
440 hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
441
442 if (irqchip_in_kernel(vcpu->kvm)) {
443 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
444 kvm_vcpu_block(vcpu);
445 hrtimer_cancel(p_ht);
446 vcpu->arch.ht_active = 0;
447
448 if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
449 return -EINTR;
450 return 1;
451 } else {
452 printk(KERN_ERR"kvm: Unsupported userspace halt!");
453 return 0;
454 }
455 }
456
457 static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
458 struct kvm_run *kvm_run)
459 {
460 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
461 return 0;
462 }
463
464 static int handle_external_interrupt(struct kvm_vcpu *vcpu,
465 struct kvm_run *kvm_run)
466 {
467 return 1;
468 }
469
470 static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
471 struct kvm_run *kvm_run) = {
472 [EXIT_REASON_VM_PANIC] = handle_vm_error,
473 [EXIT_REASON_MMIO_INSTRUCTION] = handle_mmio,
474 [EXIT_REASON_PAL_CALL] = handle_pal_call,
475 [EXIT_REASON_SAL_CALL] = handle_sal_call,
476 [EXIT_REASON_SWITCH_RR6] = handle_switch_rr6,
477 [EXIT_REASON_VM_DESTROY] = handle_vm_shutdown,
478 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
479 [EXIT_REASON_IPI] = handle_ipi,
480 [EXIT_REASON_PTC_G] = handle_global_purge,
481
482 };
483
484 static const int kvm_vti_max_exit_handlers =
485 sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
486
487 static void kvm_prepare_guest_switch(struct kvm_vcpu *vcpu)
488 {
489 }
490
491 static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
492 {
493 struct exit_ctl_data *p_exit_data;
494
495 p_exit_data = kvm_get_exit_data(vcpu);
496 return p_exit_data->exit_reason;
497 }
498
499 /*
500 * The guest has exited. See if we can fix it or if we need userspace
501 * assistance.
502 */
503 static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
504 {
505 u32 exit_reason = kvm_get_exit_reason(vcpu);
506 vcpu->arch.last_exit = exit_reason;
507
508 if (exit_reason < kvm_vti_max_exit_handlers
509 && kvm_vti_exit_handlers[exit_reason])
510 return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
511 else {
512 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
513 kvm_run->hw.hardware_exit_reason = exit_reason;
514 }
515 return 0;
516 }
517
518 static inline void vti_set_rr6(unsigned long rr6)
519 {
520 ia64_set_rr(RR6, rr6);
521 ia64_srlz_i();
522 }
523
524 static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
525 {
526 unsigned long pte;
527 struct kvm *kvm = vcpu->kvm;
528 int r;
529
530 /*Insert a pair of tr to map vmm*/
531 pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
532 r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
533 if (r < 0)
534 goto out;
535 vcpu->arch.vmm_tr_slot = r;
536 /*Insert a pairt of tr to map data of vm*/
537 pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
538 r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
539 pte, KVM_VM_DATA_SHIFT);
540 if (r < 0)
541 goto out;
542 vcpu->arch.vm_tr_slot = r;
543 r = 0;
544 out:
545 return r;
546
547 }
548
549 static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
550 {
551
552 ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
553 ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
554
555 }
556
557 static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
558 {
559 int cpu = smp_processor_id();
560
561 if (vcpu->arch.last_run_cpu != cpu ||
562 per_cpu(last_vcpu, cpu) != vcpu) {
563 per_cpu(last_vcpu, cpu) = vcpu;
564 vcpu->arch.last_run_cpu = cpu;
565 kvm_flush_tlb_all();
566 }
567
568 vcpu->arch.host_rr6 = ia64_get_rr(RR6);
569 vti_set_rr6(vcpu->arch.vmm_rr);
570 return kvm_insert_vmm_mapping(vcpu);
571 }
572 static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
573 {
574 kvm_purge_vmm_mapping(vcpu);
575 vti_set_rr6(vcpu->arch.host_rr6);
576 }
577
578 static int vti_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
579 {
580 union context *host_ctx, *guest_ctx;
581 int r;
582
583 /*Get host and guest context with guest address space.*/
584 host_ctx = kvm_get_host_context(vcpu);
585 guest_ctx = kvm_get_guest_context(vcpu);
586
587 r = kvm_vcpu_pre_transition(vcpu);
588 if (r < 0)
589 goto out;
590 kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
591 kvm_vcpu_post_transition(vcpu);
592 r = 0;
593 out:
594 return r;
595 }
596
597 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
598 {
599 int r;
600
601 again:
602 preempt_disable();
603
604 kvm_prepare_guest_switch(vcpu);
605 local_irq_disable();
606
607 if (signal_pending(current)) {
608 local_irq_enable();
609 preempt_enable();
610 r = -EINTR;
611 kvm_run->exit_reason = KVM_EXIT_INTR;
612 goto out;
613 }
614
615 vcpu->guest_mode = 1;
616 kvm_guest_enter();
617
618 r = vti_vcpu_run(vcpu, kvm_run);
619 if (r < 0) {
620 local_irq_enable();
621 preempt_enable();
622 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
623 goto out;
624 }
625
626 vcpu->arch.launched = 1;
627 vcpu->guest_mode = 0;
628 local_irq_enable();
629
630 /*
631 * We must have an instruction between local_irq_enable() and
632 * kvm_guest_exit(), so the timer interrupt isn't delayed by
633 * the interrupt shadow. The stat.exits increment will do nicely.
634 * But we need to prevent reordering, hence this barrier():
635 */
636 barrier();
637
638 kvm_guest_exit();
639
640 preempt_enable();
641
642 r = kvm_handle_exit(kvm_run, vcpu);
643
644 if (r > 0) {
645 if (!need_resched())
646 goto again;
647 }
648
649 out:
650 if (r > 0) {
651 kvm_resched(vcpu);
652 goto again;
653 }
654
655 return r;
656 }
657
658 static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
659 {
660 struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
661
662 if (!vcpu->mmio_is_write)
663 memcpy(&p->data, vcpu->mmio_data, 8);
664 p->state = STATE_IORESP_READY;
665 }
666
667 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
668 {
669 int r;
670 sigset_t sigsaved;
671
672 vcpu_load(vcpu);
673
674 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
675 kvm_vcpu_block(vcpu);
676 vcpu_put(vcpu);
677 return -EAGAIN;
678 }
679
680 if (vcpu->sigset_active)
681 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
682
683 if (vcpu->mmio_needed) {
684 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
685 kvm_set_mmio_data(vcpu);
686 vcpu->mmio_read_completed = 1;
687 vcpu->mmio_needed = 0;
688 }
689 r = __vcpu_run(vcpu, kvm_run);
690
691 if (vcpu->sigset_active)
692 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
693
694 vcpu_put(vcpu);
695 return r;
696 }
697
698 /*
699 * Allocate 16M memory for every vm to hold its specific data.
700 * Its memory map is defined in kvm_host.h.
701 */
702 static struct kvm *kvm_alloc_kvm(void)
703 {
704
705 struct kvm *kvm;
706 uint64_t vm_base;
707
708 vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
709
710 if (!vm_base)
711 return ERR_PTR(-ENOMEM);
712 printk(KERN_DEBUG"kvm: VM data's base Address:0x%lx\n", vm_base);
713
714 /* Zero all pages before use! */
715 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
716
717 kvm = (struct kvm *)(vm_base + KVM_VM_OFS);
718 kvm->arch.vm_base = vm_base;
719
720 return kvm;
721 }
722
723 struct kvm_io_range {
724 unsigned long start;
725 unsigned long size;
726 unsigned long type;
727 };
728
729 static const struct kvm_io_range io_ranges[] = {
730 {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
731 {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
732 {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
733 {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
734 {PIB_START, PIB_SIZE, GPFN_PIB},
735 };
736
737 static void kvm_build_io_pmt(struct kvm *kvm)
738 {
739 unsigned long i, j;
740
741 /* Mark I/O ranges */
742 for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
743 i++) {
744 for (j = io_ranges[i].start;
745 j < io_ranges[i].start + io_ranges[i].size;
746 j += PAGE_SIZE)
747 kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
748 io_ranges[i].type, 0);
749 }
750
751 }
752
753 /*Use unused rids to virtualize guest rid.*/
754 #define GUEST_PHYSICAL_RR0 0x1739
755 #define GUEST_PHYSICAL_RR4 0x2739
756 #define VMM_INIT_RR 0x1660
757
758 static void kvm_init_vm(struct kvm *kvm)
759 {
760 long vm_base;
761
762 BUG_ON(!kvm);
763
764 kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
765 kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
766 kvm->arch.vmm_init_rr = VMM_INIT_RR;
767
768 vm_base = kvm->arch.vm_base;
769 if (vm_base) {
770 kvm->arch.vhpt_base = vm_base + KVM_VHPT_OFS;
771 kvm->arch.vtlb_base = vm_base + KVM_VTLB_OFS;
772 kvm->arch.vpd_base = vm_base + KVM_VPD_OFS;
773 }
774
775 /*
776 *Fill P2M entries for MMIO/IO ranges
777 */
778 kvm_build_io_pmt(kvm);
779
780 INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
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 int i;
836 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
837 int r;
838
839 vcpu_load(vcpu);
840
841 for (i = 0; i < 16; i++) {
842 vpd->vgr[i] = regs->vpd.vgr[i];
843 vpd->vbgr[i] = regs->vpd.vbgr[i];
844 }
845 for (i = 0; i < 128; i++)
846 vpd->vcr[i] = regs->vpd.vcr[i];
847 vpd->vhpi = regs->vpd.vhpi;
848 vpd->vnat = regs->vpd.vnat;
849 vpd->vbnat = regs->vpd.vbnat;
850 vpd->vpsr = regs->vpd.vpsr;
851
852 vpd->vpr = regs->vpd.vpr;
853
854 r = -EFAULT;
855 r = copy_from_user(&vcpu->arch.guest, regs->saved_guest,
856 sizeof(union context));
857 if (r)
858 goto out;
859 r = copy_from_user(vcpu + 1, regs->saved_stack +
860 sizeof(struct kvm_vcpu),
861 IA64_STK_OFFSET - sizeof(struct kvm_vcpu));
862 if (r)
863 goto out;
864 vcpu->arch.exit_data =
865 ((struct kvm_vcpu *)(regs->saved_stack))->arch.exit_data;
866
867 RESTORE_REGS(mp_state);
868 RESTORE_REGS(vmm_rr);
869 memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
870 memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
871 RESTORE_REGS(itr_regions);
872 RESTORE_REGS(dtr_regions);
873 RESTORE_REGS(tc_regions);
874 RESTORE_REGS(irq_check);
875 RESTORE_REGS(itc_check);
876 RESTORE_REGS(timer_check);
877 RESTORE_REGS(timer_pending);
878 RESTORE_REGS(last_itc);
879 for (i = 0; i < 8; i++) {
880 vcpu->arch.vrr[i] = regs->vrr[i];
881 vcpu->arch.ibr[i] = regs->ibr[i];
882 vcpu->arch.dbr[i] = regs->dbr[i];
883 }
884 for (i = 0; i < 4; i++)
885 vcpu->arch.insvc[i] = regs->insvc[i];
886 RESTORE_REGS(xtp);
887 RESTORE_REGS(metaphysical_rr0);
888 RESTORE_REGS(metaphysical_rr4);
889 RESTORE_REGS(metaphysical_saved_rr0);
890 RESTORE_REGS(metaphysical_saved_rr4);
891 RESTORE_REGS(fp_psr);
892 RESTORE_REGS(saved_gp);
893
894 vcpu->arch.irq_new_pending = 1;
895 vcpu->arch.itc_offset = regs->saved_itc - ia64_getreg(_IA64_REG_AR_ITC);
896 set_bit(KVM_REQ_RESUME, &vcpu->requests);
897
898 vcpu_put(vcpu);
899 r = 0;
900 out:
901 return r;
902 }
903
904 long kvm_arch_vm_ioctl(struct file *filp,
905 unsigned int ioctl, unsigned long arg)
906 {
907 struct kvm *kvm = filp->private_data;
908 void __user *argp = (void __user *)arg;
909 int r = -EINVAL;
910
911 switch (ioctl) {
912 case KVM_SET_MEMORY_REGION: {
913 struct kvm_memory_region kvm_mem;
914 struct kvm_userspace_memory_region kvm_userspace_mem;
915
916 r = -EFAULT;
917 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
918 goto out;
919 kvm_userspace_mem.slot = kvm_mem.slot;
920 kvm_userspace_mem.flags = kvm_mem.flags;
921 kvm_userspace_mem.guest_phys_addr =
922 kvm_mem.guest_phys_addr;
923 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
924 r = kvm_vm_ioctl_set_memory_region(kvm,
925 &kvm_userspace_mem, 0);
926 if (r)
927 goto out;
928 break;
929 }
930 case KVM_CREATE_IRQCHIP:
931 r = -EFAULT;
932 r = kvm_ioapic_init(kvm);
933 if (r)
934 goto out;
935 break;
936 case KVM_IRQ_LINE: {
937 struct kvm_irq_level irq_event;
938
939 r = -EFAULT;
940 if (copy_from_user(&irq_event, argp, sizeof irq_event))
941 goto out;
942 if (irqchip_in_kernel(kvm)) {
943 mutex_lock(&kvm->lock);
944 kvm_ioapic_set_irq(kvm->arch.vioapic,
945 irq_event.irq,
946 irq_event.level);
947 mutex_unlock(&kvm->lock);
948 r = 0;
949 }
950 break;
951 }
952 case KVM_GET_IRQCHIP: {
953 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
954 struct kvm_irqchip chip;
955
956 r = -EFAULT;
957 if (copy_from_user(&chip, argp, sizeof chip))
958 goto out;
959 r = -ENXIO;
960 if (!irqchip_in_kernel(kvm))
961 goto out;
962 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
963 if (r)
964 goto out;
965 r = -EFAULT;
966 if (copy_to_user(argp, &chip, sizeof chip))
967 goto out;
968 r = 0;
969 break;
970 }
971 case KVM_SET_IRQCHIP: {
972 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
973 struct kvm_irqchip chip;
974
975 r = -EFAULT;
976 if (copy_from_user(&chip, argp, sizeof chip))
977 goto out;
978 r = -ENXIO;
979 if (!irqchip_in_kernel(kvm))
980 goto out;
981 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
982 if (r)
983 goto out;
984 r = 0;
985 break;
986 }
987 default:
988 ;
989 }
990 out:
991 return r;
992 }
993
994 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
995 struct kvm_sregs *sregs)
996 {
997 return -EINVAL;
998 }
999
1000 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1001 struct kvm_sregs *sregs)
1002 {
1003 return -EINVAL;
1004
1005 }
1006 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1007 struct kvm_translation *tr)
1008 {
1009
1010 return -EINVAL;
1011 }
1012
1013 static int kvm_alloc_vmm_area(void)
1014 {
1015 if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1016 kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1017 get_order(KVM_VMM_SIZE));
1018 if (!kvm_vmm_base)
1019 return -ENOMEM;
1020
1021 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1022 kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1023
1024 printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1025 kvm_vmm_base, kvm_vm_buffer);
1026 }
1027
1028 return 0;
1029 }
1030
1031 static void kvm_free_vmm_area(void)
1032 {
1033 if (kvm_vmm_base) {
1034 /*Zero this area before free to avoid bits leak!!*/
1035 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1036 free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1037 kvm_vmm_base = 0;
1038 kvm_vm_buffer = 0;
1039 kvm_vsa_base = 0;
1040 }
1041 }
1042
1043 static void vti_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1044 {
1045 }
1046
1047 static int vti_init_vpd(struct kvm_vcpu *vcpu)
1048 {
1049 int i;
1050 union cpuid3_t cpuid3;
1051 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1052
1053 if (IS_ERR(vpd))
1054 return PTR_ERR(vpd);
1055
1056 /* CPUID init */
1057 for (i = 0; i < 5; i++)
1058 vpd->vcpuid[i] = ia64_get_cpuid(i);
1059
1060 /* Limit the CPUID number to 5 */
1061 cpuid3.value = vpd->vcpuid[3];
1062 cpuid3.number = 4; /* 5 - 1 */
1063 vpd->vcpuid[3] = cpuid3.value;
1064
1065 /*Set vac and vdc fields*/
1066 vpd->vac.a_from_int_cr = 1;
1067 vpd->vac.a_to_int_cr = 1;
1068 vpd->vac.a_from_psr = 1;
1069 vpd->vac.a_from_cpuid = 1;
1070 vpd->vac.a_cover = 1;
1071 vpd->vac.a_bsw = 1;
1072 vpd->vac.a_int = 1;
1073 vpd->vdc.d_vmsw = 1;
1074
1075 /*Set virtual buffer*/
1076 vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
1077
1078 return 0;
1079 }
1080
1081 static int vti_create_vp(struct kvm_vcpu *vcpu)
1082 {
1083 long ret;
1084 struct vpd *vpd = vcpu->arch.vpd;
1085 unsigned long vmm_ivt;
1086
1087 vmm_ivt = kvm_vmm_info->vmm_ivt;
1088
1089 printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
1090
1091 ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
1092
1093 if (ret) {
1094 printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
1095 return -EINVAL;
1096 }
1097 return 0;
1098 }
1099
1100 static void init_ptce_info(struct kvm_vcpu *vcpu)
1101 {
1102 ia64_ptce_info_t ptce = {0};
1103
1104 ia64_get_ptce(&ptce);
1105 vcpu->arch.ptce_base = ptce.base;
1106 vcpu->arch.ptce_count[0] = ptce.count[0];
1107 vcpu->arch.ptce_count[1] = ptce.count[1];
1108 vcpu->arch.ptce_stride[0] = ptce.stride[0];
1109 vcpu->arch.ptce_stride[1] = ptce.stride[1];
1110 }
1111
1112 static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
1113 {
1114 struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
1115
1116 if (hrtimer_cancel(p_ht))
1117 hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
1118 }
1119
1120 static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
1121 {
1122 struct kvm_vcpu *vcpu;
1123 wait_queue_head_t *q;
1124
1125 vcpu = container_of(data, struct kvm_vcpu, arch.hlt_timer);
1126 if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
1127 goto out;
1128
1129 q = &vcpu->wq;
1130 if (waitqueue_active(q)) {
1131 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1132 wake_up_interruptible(q);
1133 }
1134 out:
1135 vcpu->arch.timer_check = 1;
1136 return HRTIMER_NORESTART;
1137 }
1138
1139 #define PALE_RESET_ENTRY 0x80000000ffffffb0UL
1140
1141 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1142 {
1143 struct kvm_vcpu *v;
1144 int r;
1145 int i;
1146 long itc_offset;
1147 struct kvm *kvm = vcpu->kvm;
1148 struct kvm_pt_regs *regs = vcpu_regs(vcpu);
1149
1150 union context *p_ctx = &vcpu->arch.guest;
1151 struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
1152
1153 /*Init vcpu context for first run.*/
1154 if (IS_ERR(vmm_vcpu))
1155 return PTR_ERR(vmm_vcpu);
1156
1157 if (vcpu->vcpu_id == 0) {
1158 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1159
1160 /*Set entry address for first run.*/
1161 regs->cr_iip = PALE_RESET_ENTRY;
1162
1163 /*Initilize itc offset for vcpus*/
1164 itc_offset = 0UL - ia64_getreg(_IA64_REG_AR_ITC);
1165 for (i = 0; i < MAX_VCPU_NUM; i++) {
1166 v = (struct kvm_vcpu *)((char *)vcpu + VCPU_SIZE * i);
1167 v->arch.itc_offset = itc_offset;
1168 v->arch.last_itc = 0;
1169 }
1170 } else
1171 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
1172
1173 r = -ENOMEM;
1174 vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
1175 if (!vcpu->arch.apic)
1176 goto out;
1177 vcpu->arch.apic->vcpu = vcpu;
1178
1179 p_ctx->gr[1] = 0;
1180 p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + IA64_STK_OFFSET);
1181 p_ctx->gr[13] = (unsigned long)vmm_vcpu;
1182 p_ctx->psr = 0x1008522000UL;
1183 p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
1184 p_ctx->caller_unat = 0;
1185 p_ctx->pr = 0x0;
1186 p_ctx->ar[36] = 0x0; /*unat*/
1187 p_ctx->ar[19] = 0x0; /*rnat*/
1188 p_ctx->ar[18] = (unsigned long)vmm_vcpu +
1189 ((sizeof(struct kvm_vcpu)+15) & ~15);
1190 p_ctx->ar[64] = 0x0; /*pfs*/
1191 p_ctx->cr[0] = 0x7e04UL;
1192 p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
1193 p_ctx->cr[8] = 0x3c;
1194
1195 /*Initilize region register*/
1196 p_ctx->rr[0] = 0x30;
1197 p_ctx->rr[1] = 0x30;
1198 p_ctx->rr[2] = 0x30;
1199 p_ctx->rr[3] = 0x30;
1200 p_ctx->rr[4] = 0x30;
1201 p_ctx->rr[5] = 0x30;
1202 p_ctx->rr[7] = 0x30;
1203
1204 /*Initilize branch register 0*/
1205 p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
1206
1207 vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
1208 vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
1209 vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
1210
1211 hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
1212 vcpu->arch.hlt_timer.function = hlt_timer_fn;
1213
1214 vcpu->arch.last_run_cpu = -1;
1215 vcpu->arch.vpd = (struct vpd *)VPD_ADDR(vcpu->vcpu_id);
1216 vcpu->arch.vsa_base = kvm_vsa_base;
1217 vcpu->arch.__gp = kvm_vmm_gp;
1218 vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
1219 vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_ADDR(vcpu->vcpu_id);
1220 vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_ADDR(vcpu->vcpu_id);
1221 init_ptce_info(vcpu);
1222
1223 r = 0;
1224 out:
1225 return r;
1226 }
1227
1228 static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
1229 {
1230 unsigned long psr;
1231 int r;
1232
1233 local_irq_save(psr);
1234 r = kvm_insert_vmm_mapping(vcpu);
1235 if (r)
1236 goto fail;
1237 r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1238 if (r)
1239 goto fail;
1240
1241 r = vti_init_vpd(vcpu);
1242 if (r) {
1243 printk(KERN_DEBUG"kvm: vpd init error!!\n");
1244 goto uninit;
1245 }
1246
1247 r = vti_create_vp(vcpu);
1248 if (r)
1249 goto uninit;
1250
1251 kvm_purge_vmm_mapping(vcpu);
1252 local_irq_restore(psr);
1253
1254 return 0;
1255 uninit:
1256 kvm_vcpu_uninit(vcpu);
1257 fail:
1258 local_irq_restore(psr);
1259 return r;
1260 }
1261
1262 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1263 unsigned int id)
1264 {
1265 struct kvm_vcpu *vcpu;
1266 unsigned long vm_base = kvm->arch.vm_base;
1267 int r;
1268 int cpu;
1269
1270 r = -ENOMEM;
1271 if (!vm_base) {
1272 printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1273 goto fail;
1274 }
1275 vcpu = (struct kvm_vcpu *)(vm_base + KVM_VCPU_OFS + VCPU_SIZE * id);
1276 vcpu->kvm = kvm;
1277
1278 cpu = get_cpu();
1279 vti_vcpu_load(vcpu, cpu);
1280 r = vti_vcpu_setup(vcpu, id);
1281 put_cpu();
1282
1283 if (r) {
1284 printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1285 goto fail;
1286 }
1287
1288 return vcpu;
1289 fail:
1290 return ERR_PTR(r);
1291 }
1292
1293 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1294 {
1295 return 0;
1296 }
1297
1298 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1299 {
1300 return -EINVAL;
1301 }
1302
1303 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1304 {
1305 return -EINVAL;
1306 }
1307
1308 int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
1309 struct kvm_debug_guest *dbg)
1310 {
1311 return -EINVAL;
1312 }
1313
1314 static void free_kvm(struct kvm *kvm)
1315 {
1316 unsigned long vm_base = kvm->arch.vm_base;
1317
1318 if (vm_base) {
1319 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1320 free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1321 }
1322
1323 }
1324
1325 static void kvm_release_vm_pages(struct kvm *kvm)
1326 {
1327 struct kvm_memory_slot *memslot;
1328 int i, j;
1329 unsigned long base_gfn;
1330
1331 for (i = 0; i < kvm->nmemslots; i++) {
1332 memslot = &kvm->memslots[i];
1333 base_gfn = memslot->base_gfn;
1334
1335 for (j = 0; j < memslot->npages; j++) {
1336 if (memslot->rmap[j])
1337 put_page((struct page *)memslot->rmap[j]);
1338 }
1339 }
1340 }
1341
1342 void kvm_arch_destroy_vm(struct kvm *kvm)
1343 {
1344 kvm_iommu_unmap_guest(kvm);
1345 #ifdef KVM_CAP_DEVICE_ASSIGNMENT
1346 kvm_free_all_assigned_devices(kvm);
1347 #endif
1348 kfree(kvm->arch.vioapic);
1349 kvm_release_vm_pages(kvm);
1350 kvm_free_physmem(kvm);
1351 free_kvm(kvm);
1352 }
1353
1354 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1355 {
1356 }
1357
1358 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1359 {
1360 if (cpu != vcpu->cpu) {
1361 vcpu->cpu = cpu;
1362 if (vcpu->arch.ht_active)
1363 kvm_migrate_hlt_timer(vcpu);
1364 }
1365 }
1366
1367 #define SAVE_REGS(_x) regs->_x = vcpu->arch._x
1368
1369 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1370 {
1371 int i;
1372 int r;
1373 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1374 vcpu_load(vcpu);
1375
1376 for (i = 0; i < 16; i++) {
1377 regs->vpd.vgr[i] = vpd->vgr[i];
1378 regs->vpd.vbgr[i] = vpd->vbgr[i];
1379 }
1380 for (i = 0; i < 128; i++)
1381 regs->vpd.vcr[i] = vpd->vcr[i];
1382 regs->vpd.vhpi = vpd->vhpi;
1383 regs->vpd.vnat = vpd->vnat;
1384 regs->vpd.vbnat = vpd->vbnat;
1385 regs->vpd.vpsr = vpd->vpsr;
1386 regs->vpd.vpr = vpd->vpr;
1387
1388 r = -EFAULT;
1389 r = copy_to_user(regs->saved_guest, &vcpu->arch.guest,
1390 sizeof(union context));
1391 if (r)
1392 goto out;
1393 r = copy_to_user(regs->saved_stack, (void *)vcpu, IA64_STK_OFFSET);
1394 if (r)
1395 goto out;
1396 SAVE_REGS(mp_state);
1397 SAVE_REGS(vmm_rr);
1398 memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1399 memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1400 SAVE_REGS(itr_regions);
1401 SAVE_REGS(dtr_regions);
1402 SAVE_REGS(tc_regions);
1403 SAVE_REGS(irq_check);
1404 SAVE_REGS(itc_check);
1405 SAVE_REGS(timer_check);
1406 SAVE_REGS(timer_pending);
1407 SAVE_REGS(last_itc);
1408 for (i = 0; i < 8; i++) {
1409 regs->vrr[i] = vcpu->arch.vrr[i];
1410 regs->ibr[i] = vcpu->arch.ibr[i];
1411 regs->dbr[i] = vcpu->arch.dbr[i];
1412 }
1413 for (i = 0; i < 4; i++)
1414 regs->insvc[i] = vcpu->arch.insvc[i];
1415 regs->saved_itc = vcpu->arch.itc_offset + ia64_getreg(_IA64_REG_AR_ITC);
1416 SAVE_REGS(xtp);
1417 SAVE_REGS(metaphysical_rr0);
1418 SAVE_REGS(metaphysical_rr4);
1419 SAVE_REGS(metaphysical_saved_rr0);
1420 SAVE_REGS(metaphysical_saved_rr4);
1421 SAVE_REGS(fp_psr);
1422 SAVE_REGS(saved_gp);
1423 vcpu_put(vcpu);
1424 r = 0;
1425 out:
1426 return r;
1427 }
1428
1429 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1430 {
1431
1432 hrtimer_cancel(&vcpu->arch.hlt_timer);
1433 kfree(vcpu->arch.apic);
1434 }
1435
1436
1437 long kvm_arch_vcpu_ioctl(struct file *filp,
1438 unsigned int ioctl, unsigned long arg)
1439 {
1440 return -EINVAL;
1441 }
1442
1443 int kvm_arch_set_memory_region(struct kvm *kvm,
1444 struct kvm_userspace_memory_region *mem,
1445 struct kvm_memory_slot old,
1446 int user_alloc)
1447 {
1448 unsigned long i;
1449 unsigned long pfn;
1450 int npages = mem->memory_size >> PAGE_SHIFT;
1451 struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
1452 unsigned long base_gfn = memslot->base_gfn;
1453
1454 for (i = 0; i < npages; i++) {
1455 pfn = gfn_to_pfn(kvm, base_gfn + i);
1456 if (!kvm_is_mmio_pfn(pfn)) {
1457 kvm_set_pmt_entry(kvm, base_gfn + i,
1458 pfn << PAGE_SHIFT,
1459 _PAGE_AR_RWX | _PAGE_MA_WB);
1460 memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1461 } else {
1462 kvm_set_pmt_entry(kvm, base_gfn + i,
1463 GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1464 _PAGE_MA_UC);
1465 memslot->rmap[i] = 0;
1466 }
1467 }
1468
1469 return 0;
1470 }
1471
1472 void kvm_arch_flush_shadow(struct kvm *kvm)
1473 {
1474 }
1475
1476 long kvm_arch_dev_ioctl(struct file *filp,
1477 unsigned int ioctl, unsigned long arg)
1478 {
1479 return -EINVAL;
1480 }
1481
1482 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1483 {
1484 kvm_vcpu_uninit(vcpu);
1485 }
1486
1487 static int vti_cpu_has_kvm_support(void)
1488 {
1489 long avail = 1, status = 1, control = 1;
1490 long ret;
1491
1492 ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1493 if (ret)
1494 goto out;
1495
1496 if (!(avail & PAL_PROC_VM_BIT))
1497 goto out;
1498
1499 printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1500
1501 ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1502 if (ret)
1503 goto out;
1504 printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1505
1506 if (!(vp_env_info & VP_OPCODE)) {
1507 printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1508 "vm_env_info:0x%lx\n", vp_env_info);
1509 }
1510
1511 return 1;
1512 out:
1513 return 0;
1514 }
1515
1516 static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1517 struct module *module)
1518 {
1519 unsigned long module_base;
1520 unsigned long vmm_size;
1521
1522 unsigned long vmm_offset, func_offset, fdesc_offset;
1523 struct fdesc *p_fdesc;
1524
1525 BUG_ON(!module);
1526
1527 if (!kvm_vmm_base) {
1528 printk("kvm: kvm area hasn't been initilized yet!!\n");
1529 return -EFAULT;
1530 }
1531
1532 /*Calculate new position of relocated vmm module.*/
1533 module_base = (unsigned long)module->module_core;
1534 vmm_size = module->core_size;
1535 if (unlikely(vmm_size > KVM_VMM_SIZE))
1536 return -EFAULT;
1537
1538 memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1539 kvm_flush_icache(kvm_vmm_base, vmm_size);
1540
1541 /*Recalculate kvm_vmm_info based on new VMM*/
1542 vmm_offset = vmm_info->vmm_ivt - module_base;
1543 kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1544 printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1545 kvm_vmm_info->vmm_ivt);
1546
1547 fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1548 kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1549 fdesc_offset);
1550 func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1551 p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1552 p_fdesc->ip = KVM_VMM_BASE + func_offset;
1553 p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1554
1555 printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1556 KVM_VMM_BASE+func_offset);
1557
1558 fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1559 kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1560 fdesc_offset);
1561 func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1562 p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1563 p_fdesc->ip = KVM_VMM_BASE + func_offset;
1564 p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1565
1566 kvm_vmm_gp = p_fdesc->gp;
1567
1568 printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1569 kvm_vmm_info->vmm_entry);
1570 printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1571 KVM_VMM_BASE + func_offset);
1572
1573 return 0;
1574 }
1575
1576 int kvm_arch_init(void *opaque)
1577 {
1578 int r;
1579 struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1580
1581 if (!vti_cpu_has_kvm_support()) {
1582 printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1583 r = -EOPNOTSUPP;
1584 goto out;
1585 }
1586
1587 if (kvm_vmm_info) {
1588 printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1589 r = -EEXIST;
1590 goto out;
1591 }
1592
1593 r = -ENOMEM;
1594 kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1595 if (!kvm_vmm_info)
1596 goto out;
1597
1598 if (kvm_alloc_vmm_area())
1599 goto out_free0;
1600
1601 r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1602 if (r)
1603 goto out_free1;
1604
1605 return 0;
1606
1607 out_free1:
1608 kvm_free_vmm_area();
1609 out_free0:
1610 kfree(kvm_vmm_info);
1611 out:
1612 return r;
1613 }
1614
1615 void kvm_arch_exit(void)
1616 {
1617 kvm_free_vmm_area();
1618 kfree(kvm_vmm_info);
1619 kvm_vmm_info = NULL;
1620 }
1621
1622 static int kvm_ia64_sync_dirty_log(struct kvm *kvm,
1623 struct kvm_dirty_log *log)
1624 {
1625 struct kvm_memory_slot *memslot;
1626 int r, i;
1627 long n, base;
1628 unsigned long *dirty_bitmap = (unsigned long *)((void *)kvm - KVM_VM_OFS
1629 + KVM_MEM_DIRTY_LOG_OFS);
1630
1631 r = -EINVAL;
1632 if (log->slot >= KVM_MEMORY_SLOTS)
1633 goto out;
1634
1635 memslot = &kvm->memslots[log->slot];
1636 r = -ENOENT;
1637 if (!memslot->dirty_bitmap)
1638 goto out;
1639
1640 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1641 base = memslot->base_gfn / BITS_PER_LONG;
1642
1643 for (i = 0; i < n/sizeof(long); ++i) {
1644 memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1645 dirty_bitmap[base + i] = 0;
1646 }
1647 r = 0;
1648 out:
1649 return r;
1650 }
1651
1652 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1653 struct kvm_dirty_log *log)
1654 {
1655 int r;
1656 int n;
1657 struct kvm_memory_slot *memslot;
1658 int is_dirty = 0;
1659
1660 spin_lock(&kvm->arch.dirty_log_lock);
1661
1662 r = kvm_ia64_sync_dirty_log(kvm, log);
1663 if (r)
1664 goto out;
1665
1666 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1667 if (r)
1668 goto out;
1669
1670 /* If nothing is dirty, don't bother messing with page tables. */
1671 if (is_dirty) {
1672 kvm_flush_remote_tlbs(kvm);
1673 memslot = &kvm->memslots[log->slot];
1674 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1675 memset(memslot->dirty_bitmap, 0, n);
1676 }
1677 r = 0;
1678 out:
1679 spin_unlock(&kvm->arch.dirty_log_lock);
1680 return r;
1681 }
1682
1683 int kvm_arch_hardware_setup(void)
1684 {
1685 return 0;
1686 }
1687
1688 void kvm_arch_hardware_unsetup(void)
1689 {
1690 }
1691
1692 static void vcpu_kick_intr(void *info)
1693 {
1694 #ifdef DEBUG
1695 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
1696 printk(KERN_DEBUG"vcpu_kick_intr %p \n", vcpu);
1697 #endif
1698 }
1699
1700 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
1701 {
1702 int ipi_pcpu = vcpu->cpu;
1703
1704 if (waitqueue_active(&vcpu->wq))
1705 wake_up_interruptible(&vcpu->wq);
1706
1707 if (vcpu->guest_mode)
1708 smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0);
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 if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE)
1719 kvm_vcpu_kick(vcpu);
1720 else if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED) {
1721 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1722 if (waitqueue_active(&vcpu->wq))
1723 wake_up_interruptible(&vcpu->wq);
1724 }
1725 return 1;
1726 }
1727 return 0;
1728 }
1729
1730 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1731 {
1732 return apic->vcpu->vcpu_id == dest;
1733 }
1734
1735 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1736 {
1737 return 0;
1738 }
1739
1740 struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector,
1741 unsigned long bitmap)
1742 {
1743 struct kvm_vcpu *lvcpu = kvm->vcpus[0];
1744 int i;
1745
1746 for (i = 1; i < KVM_MAX_VCPUS; i++) {
1747 if (!kvm->vcpus[i])
1748 continue;
1749 if (lvcpu->arch.xtp > kvm->vcpus[i]->arch.xtp)
1750 lvcpu = kvm->vcpus[i];
1751 }
1752
1753 return lvcpu;
1754 }
1755
1756 static int find_highest_bits(int *dat)
1757 {
1758 u32 bits, bitnum;
1759 int i;
1760
1761 /* loop for all 256 bits */
1762 for (i = 7; i >= 0 ; i--) {
1763 bits = dat[i];
1764 if (bits) {
1765 bitnum = fls(bits);
1766 return i * 32 + bitnum - 1;
1767 }
1768 }
1769
1770 return -1;
1771 }
1772
1773 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1774 {
1775 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1776
1777 if (vpd->irr[0] & (1UL << NMI_VECTOR))
1778 return NMI_VECTOR;
1779 if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1780 return ExtINT_VECTOR;
1781
1782 return find_highest_bits((int *)&vpd->irr[0]);
1783 }
1784
1785 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
1786 {
1787 if (kvm_highest_pending_irq(vcpu) != -1)
1788 return 1;
1789 return 0;
1790 }
1791
1792 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1793 {
1794 return 0;
1795 }
1796
1797 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
1798 {
1799 return gfn;
1800 }
1801
1802 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1803 {
1804 return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE;
1805 }
1806
1807 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1808 struct kvm_mp_state *mp_state)
1809 {
1810 vcpu_load(vcpu);
1811 mp_state->mp_state = vcpu->arch.mp_state;
1812 vcpu_put(vcpu);
1813 return 0;
1814 }
1815
1816 static int vcpu_reset(struct kvm_vcpu *vcpu)
1817 {
1818 int r;
1819 long psr;
1820 local_irq_save(psr);
1821 r = kvm_insert_vmm_mapping(vcpu);
1822 if (r)
1823 goto fail;
1824
1825 vcpu->arch.launched = 0;
1826 kvm_arch_vcpu_uninit(vcpu);
1827 r = kvm_arch_vcpu_init(vcpu);
1828 if (r)
1829 goto fail;
1830
1831 kvm_purge_vmm_mapping(vcpu);
1832 r = 0;
1833 fail:
1834 local_irq_restore(psr);
1835 return r;
1836 }
1837
1838 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1839 struct kvm_mp_state *mp_state)
1840 {
1841 int r = 0;
1842
1843 vcpu_load(vcpu);
1844 vcpu->arch.mp_state = mp_state->mp_state;
1845 if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
1846 r = vcpu_reset(vcpu);
1847 vcpu_put(vcpu);
1848 return r;
1849 }
Stable & featurefull patchset based on Linus's git branch