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fix typos concerning "initiali[zs]e"
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / arch / ia64 / kvm / kvm-ia64.c
blob29afd9a252ffe8121caf0853c63694e2d08c814d
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/fs.h>
27 #include <linux/slab.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 #include <asm/sn/addrs.h>
45 #include <asm/sn/clksupport.h>
46 #include <asm/sn/shub_mmr.h>
47
48 #include "misc.h"
49 #include "vti.h"
50 #include "iodev.h"
51 #include "ioapic.h"
52 #include "lapic.h"
53 #include "irq.h"
54
55 static unsigned long kvm_vmm_base;
56 static unsigned long kvm_vsa_base;
57 static unsigned long kvm_vm_buffer;
58 static unsigned long kvm_vm_buffer_size;
59 unsigned long kvm_vmm_gp;
60
61 static long vp_env_info;
62
63 static struct kvm_vmm_info *kvm_vmm_info;
64
65 static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu);
66
67 struct kvm_stats_debugfs_item debugfs_entries[] = {
68 { NULL }
69 };
70
71 static unsigned long kvm_get_itc(struct kvm_vcpu *vcpu)
72 {
73 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
74 if (vcpu->kvm->arch.is_sn2)
75 return rtc_time();
76 else
77 #endif
78 return ia64_getreg(_IA64_REG_AR_ITC);
79 }
80
81 static void kvm_flush_icache(unsigned long start, unsigned long len)
82 {
83 int l;
84
85 for (l = 0; l < (len + 32); l += 32)
86 ia64_fc((void *)(start + l));
87
88 ia64_sync_i();
89 ia64_srlz_i();
90 }
91
92 static void kvm_flush_tlb_all(void)
93 {
94 unsigned long i, j, count0, count1, stride0, stride1, addr;
95 long flags;
96
97 addr = local_cpu_data->ptce_base;
98 count0 = local_cpu_data->ptce_count[0];
99 count1 = local_cpu_data->ptce_count[1];
100 stride0 = local_cpu_data->ptce_stride[0];
101 stride1 = local_cpu_data->ptce_stride[1];
102
103 local_irq_save(flags);
104 for (i = 0; i < count0; ++i) {
105 for (j = 0; j < count1; ++j) {
106 ia64_ptce(addr);
107 addr += stride1;
108 }
109 addr += stride0;
110 }
111 local_irq_restore(flags);
112 ia64_srlz_i(); /* srlz.i implies srlz.d */
113 }
114
115 long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler)
116 {
117 struct ia64_pal_retval iprv;
118
119 PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva,
120 (u64)opt_handler);
121
122 return iprv.status;
123 }
124
125 static DEFINE_SPINLOCK(vp_lock);
126
127 int kvm_arch_hardware_enable(void *garbage)
128 {
129 long status;
130 long tmp_base;
131 unsigned long pte;
132 unsigned long saved_psr;
133 int slot;
134
135 pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
136 local_irq_save(saved_psr);
137 slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
138 local_irq_restore(saved_psr);
139 if (slot < 0)
140 return -EINVAL;
141
142 spin_lock(&vp_lock);
143 status = ia64_pal_vp_init_env(kvm_vsa_base ?
144 VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
145 __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
146 if (status != 0) {
147 printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
148 return -EINVAL;
149 }
150
151 if (!kvm_vsa_base) {
152 kvm_vsa_base = tmp_base;
153 printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
154 }
155 spin_unlock(&vp_lock);
156 ia64_ptr_entry(0x3, slot);
157
158 return 0;
159 }
160
161 void kvm_arch_hardware_disable(void *garbage)
162 {
163
164 long status;
165 int slot;
166 unsigned long pte;
167 unsigned long saved_psr;
168 unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
169
170 pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
171 PAGE_KERNEL));
172
173 local_irq_save(saved_psr);
174 slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
175 local_irq_restore(saved_psr);
176 if (slot < 0)
177 return;
178
179 status = ia64_pal_vp_exit_env(host_iva);
180 if (status)
181 printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
182 status);
183 ia64_ptr_entry(0x3, slot);
184 }
185
186 void kvm_arch_check_processor_compat(void *rtn)
187 {
188 *(int *)rtn = 0;
189 }
190
191 int kvm_dev_ioctl_check_extension(long ext)
192 {
193
194 int r;
195
196 switch (ext) {
197 case KVM_CAP_IRQCHIP:
198 case KVM_CAP_MP_STATE:
199 case KVM_CAP_IRQ_INJECT_STATUS:
200 r = 1;
201 break;
202 case KVM_CAP_COALESCED_MMIO:
203 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
204 break;
205 case KVM_CAP_IOMMU:
206 r = iommu_found();
207 break;
208 default:
209 r = 0;
210 }
211 return r;
212
213 }
214
215 static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
216 {
217 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
218 kvm_run->hw.hardware_exit_reason = 1;
219 return 0;
220 }
221
222 static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
223 {
224 struct kvm_mmio_req *p;
225 struct kvm_io_device *mmio_dev;
226 int r;
227
228 p = kvm_get_vcpu_ioreq(vcpu);
229
230 if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS)
231 goto mmio;
232 vcpu->mmio_needed = 1;
233 vcpu->mmio_phys_addr = kvm_run->mmio.phys_addr = p->addr;
234 vcpu->mmio_size = kvm_run->mmio.len = p->size;
235 vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir;
236
237 if (vcpu->mmio_is_write)
238 memcpy(vcpu->mmio_data, &p->data, p->size);
239 memcpy(kvm_run->mmio.data, &p->data, p->size);
240 kvm_run->exit_reason = KVM_EXIT_MMIO;
241 return 0;
242 mmio:
243 if (p->dir)
244 r = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, p->addr,
245 p->size, &p->data);
246 else
247 r = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, p->addr,
248 p->size, &p->data);
249 if (r)
250 printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr);
251 p->state = STATE_IORESP_READY;
252
253 return 1;
254 }
255
256 static int handle_pal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
257 {
258 struct exit_ctl_data *p;
259
260 p = kvm_get_exit_data(vcpu);
261
262 if (p->exit_reason == EXIT_REASON_PAL_CALL)
263 return kvm_pal_emul(vcpu, kvm_run);
264 else {
265 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
266 kvm_run->hw.hardware_exit_reason = 2;
267 return 0;
268 }
269 }
270
271 static int handle_sal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
272 {
273 struct exit_ctl_data *p;
274
275 p = kvm_get_exit_data(vcpu);
276
277 if (p->exit_reason == EXIT_REASON_SAL_CALL) {
278 kvm_sal_emul(vcpu);
279 return 1;
280 } else {
281 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
282 kvm_run->hw.hardware_exit_reason = 3;
283 return 0;
284 }
285
286 }
287
288 static int __apic_accept_irq(struct kvm_vcpu *vcpu, uint64_t vector)
289 {
290 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
291
292 if (!test_and_set_bit(vector, &vpd->irr[0])) {
293 vcpu->arch.irq_new_pending = 1;
294 kvm_vcpu_kick(vcpu);
295 return 1;
296 }
297 return 0;
298 }
299
300 /*
301 * offset: address offset to IPI space.
302 * value: deliver value.
303 */
304 static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm,
305 uint64_t vector)
306 {
307 switch (dm) {
308 case SAPIC_FIXED:
309 break;
310 case SAPIC_NMI:
311 vector = 2;
312 break;
313 case SAPIC_EXTINT:
314 vector = 0;
315 break;
316 case SAPIC_INIT:
317 case SAPIC_PMI:
318 default:
319 printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n");
320 return;
321 }
322 __apic_accept_irq(vcpu, vector);
323 }
324
325 static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id,
326 unsigned long eid)
327 {
328 union ia64_lid lid;
329 int i;
330 struct kvm_vcpu *vcpu;
331
332 kvm_for_each_vcpu(i, vcpu, kvm) {
333 lid.val = VCPU_LID(vcpu);
334 if (lid.id == id && lid.eid == eid)
335 return vcpu;
336 }
337
338 return NULL;
339 }
340
341 static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
342 {
343 struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
344 struct kvm_vcpu *target_vcpu;
345 struct kvm_pt_regs *regs;
346 union ia64_ipi_a addr = p->u.ipi_data.addr;
347 union ia64_ipi_d data = p->u.ipi_data.data;
348
349 target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid);
350 if (!target_vcpu)
351 return handle_vm_error(vcpu, kvm_run);
352
353 if (!target_vcpu->arch.launched) {
354 regs = vcpu_regs(target_vcpu);
355
356 regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip;
357 regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp;
358
359 target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
360 if (waitqueue_active(&target_vcpu->wq))
361 wake_up_interruptible(&target_vcpu->wq);
362 } else {
363 vcpu_deliver_ipi(target_vcpu, data.dm, data.vector);
364 if (target_vcpu != vcpu)
365 kvm_vcpu_kick(target_vcpu);
366 }
367
368 return 1;
369 }
370
371 struct call_data {
372 struct kvm_ptc_g ptc_g_data;
373 struct kvm_vcpu *vcpu;
374 };
375
376 static void vcpu_global_purge(void *info)
377 {
378 struct call_data *p = (struct call_data *)info;
379 struct kvm_vcpu *vcpu = p->vcpu;
380
381 if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
382 return;
383
384 set_bit(KVM_REQ_PTC_G, &vcpu->requests);
385 if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) {
386 vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] =
387 p->ptc_g_data;
388 } else {
389 clear_bit(KVM_REQ_PTC_G, &vcpu->requests);
390 vcpu->arch.ptc_g_count = 0;
391 set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
392 }
393 }
394
395 static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
396 {
397 struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
398 struct kvm *kvm = vcpu->kvm;
399 struct call_data call_data;
400 int i;
401 struct kvm_vcpu *vcpui;
402
403 call_data.ptc_g_data = p->u.ptc_g_data;
404
405 kvm_for_each_vcpu(i, vcpui, kvm) {
406 if (vcpui->arch.mp_state == KVM_MP_STATE_UNINITIALIZED ||
407 vcpu == vcpui)
408 continue;
409
410 if (waitqueue_active(&vcpui->wq))
411 wake_up_interruptible(&vcpui->wq);
412
413 if (vcpui->cpu != -1) {
414 call_data.vcpu = vcpui;
415 smp_call_function_single(vcpui->cpu,
416 vcpu_global_purge, &call_data, 1);
417 } else
418 printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
419
420 }
421 return 1;
422 }
423
424 static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
425 {
426 return 1;
427 }
428
429 static int kvm_sn2_setup_mappings(struct kvm_vcpu *vcpu)
430 {
431 unsigned long pte, rtc_phys_addr, map_addr;
432 int slot;
433
434 map_addr = KVM_VMM_BASE + (1UL << KVM_VMM_SHIFT);
435 rtc_phys_addr = LOCAL_MMR_OFFSET | SH_RTC;
436 pte = pte_val(mk_pte_phys(rtc_phys_addr, PAGE_KERNEL_UC));
437 slot = ia64_itr_entry(0x3, map_addr, pte, PAGE_SHIFT);
438 vcpu->arch.sn_rtc_tr_slot = slot;
439 if (slot < 0) {
440 printk(KERN_ERR "Mayday mayday! RTC mapping failed!\n");
441 slot = 0;
442 }
443 return slot;
444 }
445
446 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
447 {
448
449 ktime_t kt;
450 long itc_diff;
451 unsigned long vcpu_now_itc;
452 unsigned long expires;
453 struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
454 unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
455 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
456
457 if (irqchip_in_kernel(vcpu->kvm)) {
458
459 vcpu_now_itc = kvm_get_itc(vcpu) + vcpu->arch.itc_offset;
460
461 if (time_after(vcpu_now_itc, vpd->itm)) {
462 vcpu->arch.timer_check = 1;
463 return 1;
464 }
465 itc_diff = vpd->itm - vcpu_now_itc;
466 if (itc_diff < 0)
467 itc_diff = -itc_diff;
468
469 expires = div64_u64(itc_diff, cyc_per_usec);
470 kt = ktime_set(0, 1000 * expires);
471
472 vcpu->arch.ht_active = 1;
473 hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
474
475 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
476 kvm_vcpu_block(vcpu);
477 hrtimer_cancel(p_ht);
478 vcpu->arch.ht_active = 0;
479
480 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests) ||
481 kvm_cpu_has_pending_timer(vcpu))
482 if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
483 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
484
485 if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
486 return -EINTR;
487 return 1;
488 } else {
489 printk(KERN_ERR"kvm: Unsupported userspace halt!");
490 return 0;
491 }
492 }
493
494 static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
495 struct kvm_run *kvm_run)
496 {
497 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
498 return 0;
499 }
500
501 static int handle_external_interrupt(struct kvm_vcpu *vcpu,
502 struct kvm_run *kvm_run)
503 {
504 return 1;
505 }
506
507 static int handle_vcpu_debug(struct kvm_vcpu *vcpu,
508 struct kvm_run *kvm_run)
509 {
510 printk("VMM: %s", vcpu->arch.log_buf);
511 return 1;
512 }
513
514 static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
515 struct kvm_run *kvm_run) = {
516 [EXIT_REASON_VM_PANIC] = handle_vm_error,
517 [EXIT_REASON_MMIO_INSTRUCTION] = handle_mmio,
518 [EXIT_REASON_PAL_CALL] = handle_pal_call,
519 [EXIT_REASON_SAL_CALL] = handle_sal_call,
520 [EXIT_REASON_SWITCH_RR6] = handle_switch_rr6,
521 [EXIT_REASON_VM_DESTROY] = handle_vm_shutdown,
522 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
523 [EXIT_REASON_IPI] = handle_ipi,
524 [EXIT_REASON_PTC_G] = handle_global_purge,
525 [EXIT_REASON_DEBUG] = handle_vcpu_debug,
526
527 };
528
529 static const int kvm_vti_max_exit_handlers =
530 sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
531
532 static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
533 {
534 struct exit_ctl_data *p_exit_data;
535
536 p_exit_data = kvm_get_exit_data(vcpu);
537 return p_exit_data->exit_reason;
538 }
539
540 /*
541 * The guest has exited. See if we can fix it or if we need userspace
542 * assistance.
543 */
544 static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
545 {
546 u32 exit_reason = kvm_get_exit_reason(vcpu);
547 vcpu->arch.last_exit = exit_reason;
548
549 if (exit_reason < kvm_vti_max_exit_handlers
550 && kvm_vti_exit_handlers[exit_reason])
551 return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
552 else {
553 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
554 kvm_run->hw.hardware_exit_reason = exit_reason;
555 }
556 return 0;
557 }
558
559 static inline void vti_set_rr6(unsigned long rr6)
560 {
561 ia64_set_rr(RR6, rr6);
562 ia64_srlz_i();
563 }
564
565 static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
566 {
567 unsigned long pte;
568 struct kvm *kvm = vcpu->kvm;
569 int r;
570
571 /*Insert a pair of tr to map vmm*/
572 pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
573 r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
574 if (r < 0)
575 goto out;
576 vcpu->arch.vmm_tr_slot = r;
577 /*Insert a pairt of tr to map data of vm*/
578 pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
579 r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
580 pte, KVM_VM_DATA_SHIFT);
581 if (r < 0)
582 goto out;
583 vcpu->arch.vm_tr_slot = r;
584
585 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
586 if (kvm->arch.is_sn2) {
587 r = kvm_sn2_setup_mappings(vcpu);
588 if (r < 0)
589 goto out;
590 }
591 #endif
592
593 r = 0;
594 out:
595 return r;
596 }
597
598 static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
599 {
600 struct kvm *kvm = vcpu->kvm;
601 ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
602 ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
603 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
604 if (kvm->arch.is_sn2)
605 ia64_ptr_entry(0x3, vcpu->arch.sn_rtc_tr_slot);
606 #endif
607 }
608
609 static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
610 {
611 unsigned long psr;
612 int r;
613 int cpu = smp_processor_id();
614
615 if (vcpu->arch.last_run_cpu != cpu ||
616 per_cpu(last_vcpu, cpu) != vcpu) {
617 per_cpu(last_vcpu, cpu) = vcpu;
618 vcpu->arch.last_run_cpu = cpu;
619 kvm_flush_tlb_all();
620 }
621
622 vcpu->arch.host_rr6 = ia64_get_rr(RR6);
623 vti_set_rr6(vcpu->arch.vmm_rr);
624 local_irq_save(psr);
625 r = kvm_insert_vmm_mapping(vcpu);
626 local_irq_restore(psr);
627 return r;
628 }
629
630 static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
631 {
632 kvm_purge_vmm_mapping(vcpu);
633 vti_set_rr6(vcpu->arch.host_rr6);
634 }
635
636 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
637 {
638 union context *host_ctx, *guest_ctx;
639 int r, idx;
640
641 idx = srcu_read_lock(&vcpu->kvm->srcu);
642
643 again:
644 if (signal_pending(current)) {
645 r = -EINTR;
646 kvm_run->exit_reason = KVM_EXIT_INTR;
647 goto out;
648 }
649
650 preempt_disable();
651 local_irq_disable();
652
653 /*Get host and guest context with guest address space.*/
654 host_ctx = kvm_get_host_context(vcpu);
655 guest_ctx = kvm_get_guest_context(vcpu);
656
657 clear_bit(KVM_REQ_KICK, &vcpu->requests);
658
659 r = kvm_vcpu_pre_transition(vcpu);
660 if (r < 0)
661 goto vcpu_run_fail;
662
663 srcu_read_unlock(&vcpu->kvm->srcu, idx);
664 kvm_guest_enter();
665
666 /*
667 * Transition to the guest
668 */
669 kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
670
671 kvm_vcpu_post_transition(vcpu);
672
673 vcpu->arch.launched = 1;
674 set_bit(KVM_REQ_KICK, &vcpu->requests);
675 local_irq_enable();
676
677 /*
678 * We must have an instruction between local_irq_enable() and
679 * kvm_guest_exit(), so the timer interrupt isn't delayed by
680 * the interrupt shadow. The stat.exits increment will do nicely.
681 * But we need to prevent reordering, hence this barrier():
682 */
683 barrier();
684 kvm_guest_exit();
685 preempt_enable();
686
687 idx = srcu_read_lock(&vcpu->kvm->srcu);
688
689 r = kvm_handle_exit(kvm_run, vcpu);
690
691 if (r > 0) {
692 if (!need_resched())
693 goto again;
694 }
695
696 out:
697 srcu_read_unlock(&vcpu->kvm->srcu, idx);
698 if (r > 0) {
699 kvm_resched(vcpu);
700 idx = srcu_read_lock(&vcpu->kvm->srcu);
701 goto again;
702 }
703
704 return r;
705
706 vcpu_run_fail:
707 local_irq_enable();
708 preempt_enable();
709 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
710 goto out;
711 }
712
713 static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
714 {
715 struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
716
717 if (!vcpu->mmio_is_write)
718 memcpy(&p->data, vcpu->mmio_data, 8);
719 p->state = STATE_IORESP_READY;
720 }
721
722 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
723 {
724 int r;
725 sigset_t sigsaved;
726
727 vcpu_load(vcpu);
728
729 if (vcpu->sigset_active)
730 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
731
732 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
733 kvm_vcpu_block(vcpu);
734 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
735 r = -EAGAIN;
736 goto out;
737 }
738
739 if (vcpu->mmio_needed) {
740 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
741 kvm_set_mmio_data(vcpu);
742 vcpu->mmio_read_completed = 1;
743 vcpu->mmio_needed = 0;
744 }
745 r = __vcpu_run(vcpu, kvm_run);
746 out:
747 if (vcpu->sigset_active)
748 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
749
750 vcpu_put(vcpu);
751 return r;
752 }
753
754 static struct kvm *kvm_alloc_kvm(void)
755 {
756
757 struct kvm *kvm;
758 uint64_t vm_base;
759
760 BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
761
762 vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
763
764 if (!vm_base)
765 return ERR_PTR(-ENOMEM);
766
767 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
768 kvm = (struct kvm *)(vm_base +
769 offsetof(struct kvm_vm_data, kvm_vm_struct));
770 kvm->arch.vm_base = vm_base;
771 printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
772
773 return kvm;
774 }
775
776 struct kvm_io_range {
777 unsigned long start;
778 unsigned long size;
779 unsigned long type;
780 };
781
782 static const struct kvm_io_range io_ranges[] = {
783 {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
784 {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
785 {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
786 {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
787 {PIB_START, PIB_SIZE, GPFN_PIB},
788 };
789
790 static void kvm_build_io_pmt(struct kvm *kvm)
791 {
792 unsigned long i, j;
793
794 /* Mark I/O ranges */
795 for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
796 i++) {
797 for (j = io_ranges[i].start;
798 j < io_ranges[i].start + io_ranges[i].size;
799 j += PAGE_SIZE)
800 kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
801 io_ranges[i].type, 0);
802 }
803
804 }
805
806 /*Use unused rids to virtualize guest rid.*/
807 #define GUEST_PHYSICAL_RR0 0x1739
808 #define GUEST_PHYSICAL_RR4 0x2739
809 #define VMM_INIT_RR 0x1660
810
811 static void kvm_init_vm(struct kvm *kvm)
812 {
813 BUG_ON(!kvm);
814
815 kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
816 kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
817 kvm->arch.vmm_init_rr = VMM_INIT_RR;
818
819 /*
820 *Fill P2M entries for MMIO/IO ranges
821 */
822 kvm_build_io_pmt(kvm);
823
824 INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
825
826 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
827 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
828 }
829
830 struct kvm *kvm_arch_create_vm(void)
831 {
832 struct kvm *kvm = kvm_alloc_kvm();
833
834 if (IS_ERR(kvm))
835 return ERR_PTR(-ENOMEM);
836
837 kvm->arch.is_sn2 = ia64_platform_is("sn2");
838
839 kvm_init_vm(kvm);
840
841 return kvm;
842
843 }
844
845 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
846 struct kvm_irqchip *chip)
847 {
848 int r;
849
850 r = 0;
851 switch (chip->chip_id) {
852 case KVM_IRQCHIP_IOAPIC:
853 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
854 break;
855 default:
856 r = -EINVAL;
857 break;
858 }
859 return r;
860 }
861
862 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
863 {
864 int r;
865
866 r = 0;
867 switch (chip->chip_id) {
868 case KVM_IRQCHIP_IOAPIC:
869 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
870 break;
871 default:
872 r = -EINVAL;
873 break;
874 }
875 return r;
876 }
877
878 #define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
879
880 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
881 {
882 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
883 int i;
884
885 vcpu_load(vcpu);
886
887 for (i = 0; i < 16; i++) {
888 vpd->vgr[i] = regs->vpd.vgr[i];
889 vpd->vbgr[i] = regs->vpd.vbgr[i];
890 }
891 for (i = 0; i < 128; i++)
892 vpd->vcr[i] = regs->vpd.vcr[i];
893 vpd->vhpi = regs->vpd.vhpi;
894 vpd->vnat = regs->vpd.vnat;
895 vpd->vbnat = regs->vpd.vbnat;
896 vpd->vpsr = regs->vpd.vpsr;
897
898 vpd->vpr = regs->vpd.vpr;
899
900 memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
901
902 RESTORE_REGS(mp_state);
903 RESTORE_REGS(vmm_rr);
904 memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
905 memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
906 RESTORE_REGS(itr_regions);
907 RESTORE_REGS(dtr_regions);
908 RESTORE_REGS(tc_regions);
909 RESTORE_REGS(irq_check);
910 RESTORE_REGS(itc_check);
911 RESTORE_REGS(timer_check);
912 RESTORE_REGS(timer_pending);
913 RESTORE_REGS(last_itc);
914 for (i = 0; i < 8; i++) {
915 vcpu->arch.vrr[i] = regs->vrr[i];
916 vcpu->arch.ibr[i] = regs->ibr[i];
917 vcpu->arch.dbr[i] = regs->dbr[i];
918 }
919 for (i = 0; i < 4; i++)
920 vcpu->arch.insvc[i] = regs->insvc[i];
921 RESTORE_REGS(xtp);
922 RESTORE_REGS(metaphysical_rr0);
923 RESTORE_REGS(metaphysical_rr4);
924 RESTORE_REGS(metaphysical_saved_rr0);
925 RESTORE_REGS(metaphysical_saved_rr4);
926 RESTORE_REGS(fp_psr);
927 RESTORE_REGS(saved_gp);
928
929 vcpu->arch.irq_new_pending = 1;
930 vcpu->arch.itc_offset = regs->saved_itc - kvm_get_itc(vcpu);
931 set_bit(KVM_REQ_RESUME, &vcpu->requests);
932
933 vcpu_put(vcpu);
934
935 return 0;
936 }
937
938 long kvm_arch_vm_ioctl(struct file *filp,
939 unsigned int ioctl, unsigned long arg)
940 {
941 struct kvm *kvm = filp->private_data;
942 void __user *argp = (void __user *)arg;
943 int r = -ENOTTY;
944
945 switch (ioctl) {
946 case KVM_SET_MEMORY_REGION: {
947 struct kvm_memory_region kvm_mem;
948 struct kvm_userspace_memory_region kvm_userspace_mem;
949
950 r = -EFAULT;
951 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
952 goto out;
953 kvm_userspace_mem.slot = kvm_mem.slot;
954 kvm_userspace_mem.flags = kvm_mem.flags;
955 kvm_userspace_mem.guest_phys_addr =
956 kvm_mem.guest_phys_addr;
957 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
958 r = kvm_vm_ioctl_set_memory_region(kvm,
959 &kvm_userspace_mem, 0);
960 if (r)
961 goto out;
962 break;
963 }
964 case KVM_CREATE_IRQCHIP:
965 r = -EFAULT;
966 r = kvm_ioapic_init(kvm);
967 if (r)
968 goto out;
969 r = kvm_setup_default_irq_routing(kvm);
970 if (r) {
971 kvm_ioapic_destroy(kvm);
972 goto out;
973 }
974 break;
975 case KVM_IRQ_LINE_STATUS:
976 case KVM_IRQ_LINE: {
977 struct kvm_irq_level irq_event;
978
979 r = -EFAULT;
980 if (copy_from_user(&irq_event, argp, sizeof irq_event))
981 goto out;
982 if (irqchip_in_kernel(kvm)) {
983 __s32 status;
984 status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
985 irq_event.irq, irq_event.level);
986 if (ioctl == KVM_IRQ_LINE_STATUS) {
987 irq_event.status = status;
988 if (copy_to_user(argp, &irq_event,
989 sizeof irq_event))
990 goto out;
991 }
992 r = 0;
993 }
994 break;
995 }
996 case KVM_GET_IRQCHIP: {
997 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
998 struct kvm_irqchip chip;
999
1000 r = -EFAULT;
1001 if (copy_from_user(&chip, argp, sizeof chip))
1002 goto out;
1003 r = -ENXIO;
1004 if (!irqchip_in_kernel(kvm))
1005 goto out;
1006 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
1007 if (r)
1008 goto out;
1009 r = -EFAULT;
1010 if (copy_to_user(argp, &chip, sizeof chip))
1011 goto out;
1012 r = 0;
1013 break;
1014 }
1015 case KVM_SET_IRQCHIP: {
1016 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1017 struct kvm_irqchip chip;
1018
1019 r = -EFAULT;
1020 if (copy_from_user(&chip, argp, sizeof chip))
1021 goto out;
1022 r = -ENXIO;
1023 if (!irqchip_in_kernel(kvm))
1024 goto out;
1025 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1026 if (r)
1027 goto out;
1028 r = 0;
1029 break;
1030 }
1031 default:
1032 ;
1033 }
1034 out:
1035 return r;
1036 }
1037
1038 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1039 struct kvm_sregs *sregs)
1040 {
1041 return -EINVAL;
1042 }
1043
1044 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1045 struct kvm_sregs *sregs)
1046 {
1047 return -EINVAL;
1048
1049 }
1050 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1051 struct kvm_translation *tr)
1052 {
1053
1054 return -EINVAL;
1055 }
1056
1057 static int kvm_alloc_vmm_area(void)
1058 {
1059 if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1060 kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1061 get_order(KVM_VMM_SIZE));
1062 if (!kvm_vmm_base)
1063 return -ENOMEM;
1064
1065 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1066 kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1067
1068 printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1069 kvm_vmm_base, kvm_vm_buffer);
1070 }
1071
1072 return 0;
1073 }
1074
1075 static void kvm_free_vmm_area(void)
1076 {
1077 if (kvm_vmm_base) {
1078 /*Zero this area before free to avoid bits leak!!*/
1079 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1080 free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1081 kvm_vmm_base = 0;
1082 kvm_vm_buffer = 0;
1083 kvm_vsa_base = 0;
1084 }
1085 }
1086
1087 static int vti_init_vpd(struct kvm_vcpu *vcpu)
1088 {
1089 int i;
1090 union cpuid3_t cpuid3;
1091 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1092
1093 if (IS_ERR(vpd))
1094 return PTR_ERR(vpd);
1095
1096 /* CPUID init */
1097 for (i = 0; i < 5; i++)
1098 vpd->vcpuid[i] = ia64_get_cpuid(i);
1099
1100 /* Limit the CPUID number to 5 */
1101 cpuid3.value = vpd->vcpuid[3];
1102 cpuid3.number = 4; /* 5 - 1 */
1103 vpd->vcpuid[3] = cpuid3.value;
1104
1105 /*Set vac and vdc fields*/
1106 vpd->vac.a_from_int_cr = 1;
1107 vpd->vac.a_to_int_cr = 1;
1108 vpd->vac.a_from_psr = 1;
1109 vpd->vac.a_from_cpuid = 1;
1110 vpd->vac.a_cover = 1;
1111 vpd->vac.a_bsw = 1;
1112 vpd->vac.a_int = 1;
1113 vpd->vdc.d_vmsw = 1;
1114
1115 /*Set virtual buffer*/
1116 vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
1117
1118 return 0;
1119 }
1120
1121 static int vti_create_vp(struct kvm_vcpu *vcpu)
1122 {
1123 long ret;
1124 struct vpd *vpd = vcpu->arch.vpd;
1125 unsigned long vmm_ivt;
1126
1127 vmm_ivt = kvm_vmm_info->vmm_ivt;
1128
1129 printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
1130
1131 ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
1132
1133 if (ret) {
1134 printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
1135 return -EINVAL;
1136 }
1137 return 0;
1138 }
1139
1140 static void init_ptce_info(struct kvm_vcpu *vcpu)
1141 {
1142 ia64_ptce_info_t ptce = {0};
1143
1144 ia64_get_ptce(&ptce);
1145 vcpu->arch.ptce_base = ptce.base;
1146 vcpu->arch.ptce_count[0] = ptce.count[0];
1147 vcpu->arch.ptce_count[1] = ptce.count[1];
1148 vcpu->arch.ptce_stride[0] = ptce.stride[0];
1149 vcpu->arch.ptce_stride[1] = ptce.stride[1];
1150 }
1151
1152 static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
1153 {
1154 struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
1155
1156 if (hrtimer_cancel(p_ht))
1157 hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
1158 }
1159
1160 static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
1161 {
1162 struct kvm_vcpu *vcpu;
1163 wait_queue_head_t *q;
1164
1165 vcpu = container_of(data, struct kvm_vcpu, arch.hlt_timer);
1166 q = &vcpu->wq;
1167
1168 if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
1169 goto out;
1170
1171 if (waitqueue_active(q))
1172 wake_up_interruptible(q);
1173
1174 out:
1175 vcpu->arch.timer_fired = 1;
1176 vcpu->arch.timer_check = 1;
1177 return HRTIMER_NORESTART;
1178 }
1179
1180 #define PALE_RESET_ENTRY 0x80000000ffffffb0UL
1181
1182 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1183 {
1184 struct kvm_vcpu *v;
1185 int r;
1186 int i;
1187 long itc_offset;
1188 struct kvm *kvm = vcpu->kvm;
1189 struct kvm_pt_regs *regs = vcpu_regs(vcpu);
1190
1191 union context *p_ctx = &vcpu->arch.guest;
1192 struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
1193
1194 /*Init vcpu context for first run.*/
1195 if (IS_ERR(vmm_vcpu))
1196 return PTR_ERR(vmm_vcpu);
1197
1198 if (kvm_vcpu_is_bsp(vcpu)) {
1199 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1200
1201 /*Set entry address for first run.*/
1202 regs->cr_iip = PALE_RESET_ENTRY;
1203
1204 /*Initialize itc offset for vcpus*/
1205 itc_offset = 0UL - kvm_get_itc(vcpu);
1206 for (i = 0; i < KVM_MAX_VCPUS; i++) {
1207 v = (struct kvm_vcpu *)((char *)vcpu +
1208 sizeof(struct kvm_vcpu_data) * i);
1209 v->arch.itc_offset = itc_offset;
1210 v->arch.last_itc = 0;
1211 }
1212 } else
1213 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
1214
1215 r = -ENOMEM;
1216 vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
1217 if (!vcpu->arch.apic)
1218 goto out;
1219 vcpu->arch.apic->vcpu = vcpu;
1220
1221 p_ctx->gr[1] = 0;
1222 p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + KVM_STK_OFFSET);
1223 p_ctx->gr[13] = (unsigned long)vmm_vcpu;
1224 p_ctx->psr = 0x1008522000UL;
1225 p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
1226 p_ctx->caller_unat = 0;
1227 p_ctx->pr = 0x0;
1228 p_ctx->ar[36] = 0x0; /*unat*/
1229 p_ctx->ar[19] = 0x0; /*rnat*/
1230 p_ctx->ar[18] = (unsigned long)vmm_vcpu +
1231 ((sizeof(struct kvm_vcpu)+15) & ~15);
1232 p_ctx->ar[64] = 0x0; /*pfs*/
1233 p_ctx->cr[0] = 0x7e04UL;
1234 p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
1235 p_ctx->cr[8] = 0x3c;
1236
1237 /*Initialize region register*/
1238 p_ctx->rr[0] = 0x30;
1239 p_ctx->rr[1] = 0x30;
1240 p_ctx->rr[2] = 0x30;
1241 p_ctx->rr[3] = 0x30;
1242 p_ctx->rr[4] = 0x30;
1243 p_ctx->rr[5] = 0x30;
1244 p_ctx->rr[7] = 0x30;
1245
1246 /*Initialize branch register 0*/
1247 p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
1248
1249 vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
1250 vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
1251 vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
1252
1253 hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
1254 vcpu->arch.hlt_timer.function = hlt_timer_fn;
1255
1256 vcpu->arch.last_run_cpu = -1;
1257 vcpu->arch.vpd = (struct vpd *)VPD_BASE(vcpu->vcpu_id);
1258 vcpu->arch.vsa_base = kvm_vsa_base;
1259 vcpu->arch.__gp = kvm_vmm_gp;
1260 vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
1261 vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_BASE(vcpu->vcpu_id);
1262 vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(vcpu->vcpu_id);
1263 init_ptce_info(vcpu);
1264
1265 r = 0;
1266 out:
1267 return r;
1268 }
1269
1270 static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
1271 {
1272 unsigned long psr;
1273 int r;
1274
1275 local_irq_save(psr);
1276 r = kvm_insert_vmm_mapping(vcpu);
1277 local_irq_restore(psr);
1278 if (r)
1279 goto fail;
1280 r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1281 if (r)
1282 goto fail;
1283
1284 r = vti_init_vpd(vcpu);
1285 if (r) {
1286 printk(KERN_DEBUG"kvm: vpd init error!!\n");
1287 goto uninit;
1288 }
1289
1290 r = vti_create_vp(vcpu);
1291 if (r)
1292 goto uninit;
1293
1294 kvm_purge_vmm_mapping(vcpu);
1295
1296 return 0;
1297 uninit:
1298 kvm_vcpu_uninit(vcpu);
1299 fail:
1300 return r;
1301 }
1302
1303 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1304 unsigned int id)
1305 {
1306 struct kvm_vcpu *vcpu;
1307 unsigned long vm_base = kvm->arch.vm_base;
1308 int r;
1309 int cpu;
1310
1311 BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
1312
1313 r = -EINVAL;
1314 if (id >= KVM_MAX_VCPUS) {
1315 printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
1316 KVM_MAX_VCPUS);
1317 goto fail;
1318 }
1319
1320 r = -ENOMEM;
1321 if (!vm_base) {
1322 printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1323 goto fail;
1324 }
1325 vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
1326 vcpu_data[id].vcpu_struct));
1327 vcpu->kvm = kvm;
1328
1329 cpu = get_cpu();
1330 r = vti_vcpu_setup(vcpu, id);
1331 put_cpu();
1332
1333 if (r) {
1334 printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1335 goto fail;
1336 }
1337
1338 return vcpu;
1339 fail:
1340 return ERR_PTR(r);
1341 }
1342
1343 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1344 {
1345 return 0;
1346 }
1347
1348 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1349 {
1350 return -EINVAL;
1351 }
1352
1353 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1354 {
1355 return -EINVAL;
1356 }
1357
1358 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1359 struct kvm_guest_debug *dbg)
1360 {
1361 return -EINVAL;
1362 }
1363
1364 static void free_kvm(struct kvm *kvm)
1365 {
1366 unsigned long vm_base = kvm->arch.vm_base;
1367
1368 if (vm_base) {
1369 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1370 free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1371 }
1372
1373 }
1374
1375 static void kvm_release_vm_pages(struct kvm *kvm)
1376 {
1377 struct kvm_memslots *slots;
1378 struct kvm_memory_slot *memslot;
1379 int i, j;
1380 unsigned long base_gfn;
1381
1382 slots = rcu_dereference(kvm->memslots);
1383 for (i = 0; i < slots->nmemslots; i++) {
1384 memslot = &slots->memslots[i];
1385 base_gfn = memslot->base_gfn;
1386
1387 for (j = 0; j < memslot->npages; j++) {
1388 if (memslot->rmap[j])
1389 put_page((struct page *)memslot->rmap[j]);
1390 }
1391 }
1392 }
1393
1394 void kvm_arch_sync_events(struct kvm *kvm)
1395 {
1396 }
1397
1398 void kvm_arch_destroy_vm(struct kvm *kvm)
1399 {
1400 kvm_iommu_unmap_guest(kvm);
1401 #ifdef KVM_CAP_DEVICE_ASSIGNMENT
1402 kvm_free_all_assigned_devices(kvm);
1403 #endif
1404 kfree(kvm->arch.vioapic);
1405 kvm_release_vm_pages(kvm);
1406 kvm_free_physmem(kvm);
1407 cleanup_srcu_struct(&kvm->srcu);
1408 free_kvm(kvm);
1409 }
1410
1411 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1412 {
1413 }
1414
1415 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1416 {
1417 if (cpu != vcpu->cpu) {
1418 vcpu->cpu = cpu;
1419 if (vcpu->arch.ht_active)
1420 kvm_migrate_hlt_timer(vcpu);
1421 }
1422 }
1423
1424 #define SAVE_REGS(_x) regs->_x = vcpu->arch._x
1425
1426 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1427 {
1428 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1429 int i;
1430
1431 vcpu_load(vcpu);
1432
1433 for (i = 0; i < 16; i++) {
1434 regs->vpd.vgr[i] = vpd->vgr[i];
1435 regs->vpd.vbgr[i] = vpd->vbgr[i];
1436 }
1437 for (i = 0; i < 128; i++)
1438 regs->vpd.vcr[i] = vpd->vcr[i];
1439 regs->vpd.vhpi = vpd->vhpi;
1440 regs->vpd.vnat = vpd->vnat;
1441 regs->vpd.vbnat = vpd->vbnat;
1442 regs->vpd.vpsr = vpd->vpsr;
1443 regs->vpd.vpr = vpd->vpr;
1444
1445 memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
1446
1447 SAVE_REGS(mp_state);
1448 SAVE_REGS(vmm_rr);
1449 memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1450 memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1451 SAVE_REGS(itr_regions);
1452 SAVE_REGS(dtr_regions);
1453 SAVE_REGS(tc_regions);
1454 SAVE_REGS(irq_check);
1455 SAVE_REGS(itc_check);
1456 SAVE_REGS(timer_check);
1457 SAVE_REGS(timer_pending);
1458 SAVE_REGS(last_itc);
1459 for (i = 0; i < 8; i++) {
1460 regs->vrr[i] = vcpu->arch.vrr[i];
1461 regs->ibr[i] = vcpu->arch.ibr[i];
1462 regs->dbr[i] = vcpu->arch.dbr[i];
1463 }
1464 for (i = 0; i < 4; i++)
1465 regs->insvc[i] = vcpu->arch.insvc[i];
1466 regs->saved_itc = vcpu->arch.itc_offset + kvm_get_itc(vcpu);
1467 SAVE_REGS(xtp);
1468 SAVE_REGS(metaphysical_rr0);
1469 SAVE_REGS(metaphysical_rr4);
1470 SAVE_REGS(metaphysical_saved_rr0);
1471 SAVE_REGS(metaphysical_saved_rr4);
1472 SAVE_REGS(fp_psr);
1473 SAVE_REGS(saved_gp);
1474
1475 vcpu_put(vcpu);
1476 return 0;
1477 }
1478
1479 int kvm_arch_vcpu_ioctl_get_stack(struct kvm_vcpu *vcpu,
1480 struct kvm_ia64_vcpu_stack *stack)
1481 {
1482 memcpy(stack, vcpu, sizeof(struct kvm_ia64_vcpu_stack));
1483 return 0;
1484 }
1485
1486 int kvm_arch_vcpu_ioctl_set_stack(struct kvm_vcpu *vcpu,
1487 struct kvm_ia64_vcpu_stack *stack)
1488 {
1489 memcpy(vcpu + 1, &stack->stack[0] + sizeof(struct kvm_vcpu),
1490 sizeof(struct kvm_ia64_vcpu_stack) - sizeof(struct kvm_vcpu));
1491
1492 vcpu->arch.exit_data = ((struct kvm_vcpu *)stack)->arch.exit_data;
1493 return 0;
1494 }
1495
1496 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1497 {
1498
1499 hrtimer_cancel(&vcpu->arch.hlt_timer);
1500 kfree(vcpu->arch.apic);
1501 }
1502
1503
1504 long kvm_arch_vcpu_ioctl(struct file *filp,
1505 unsigned int ioctl, unsigned long arg)
1506 {
1507 struct kvm_vcpu *vcpu = filp->private_data;
1508 void __user *argp = (void __user *)arg;
1509 struct kvm_ia64_vcpu_stack *stack = NULL;
1510 long r;
1511
1512 switch (ioctl) {
1513 case KVM_IA64_VCPU_GET_STACK: {
1514 struct kvm_ia64_vcpu_stack __user *user_stack;
1515 void __user *first_p = argp;
1516
1517 r = -EFAULT;
1518 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1519 goto out;
1520
1521 if (!access_ok(VERIFY_WRITE, user_stack,
1522 sizeof(struct kvm_ia64_vcpu_stack))) {
1523 printk(KERN_INFO "KVM_IA64_VCPU_GET_STACK: "
1524 "Illegal user destination address for stack\n");
1525 goto out;
1526 }
1527 stack = kzalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1528 if (!stack) {
1529 r = -ENOMEM;
1530 goto out;
1531 }
1532
1533 r = kvm_arch_vcpu_ioctl_get_stack(vcpu, stack);
1534 if (r)
1535 goto out;
1536
1537 if (copy_to_user(user_stack, stack,
1538 sizeof(struct kvm_ia64_vcpu_stack)))
1539 goto out;
1540
1541 break;
1542 }
1543 case KVM_IA64_VCPU_SET_STACK: {
1544 struct kvm_ia64_vcpu_stack __user *user_stack;
1545 void __user *first_p = argp;
1546
1547 r = -EFAULT;
1548 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1549 goto out;
1550
1551 if (!access_ok(VERIFY_READ, user_stack,
1552 sizeof(struct kvm_ia64_vcpu_stack))) {
1553 printk(KERN_INFO "KVM_IA64_VCPU_SET_STACK: "
1554 "Illegal user address for stack\n");
1555 goto out;
1556 }
1557 stack = kmalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1558 if (!stack) {
1559 r = -ENOMEM;
1560 goto out;
1561 }
1562 if (copy_from_user(stack, user_stack,
1563 sizeof(struct kvm_ia64_vcpu_stack)))
1564 goto out;
1565
1566 r = kvm_arch_vcpu_ioctl_set_stack(vcpu, stack);
1567 break;
1568 }
1569
1570 default:
1571 r = -EINVAL;
1572 }
1573
1574 out:
1575 kfree(stack);
1576 return r;
1577 }
1578
1579 int kvm_arch_prepare_memory_region(struct kvm *kvm,
1580 struct kvm_memory_slot *memslot,
1581 struct kvm_memory_slot old,
1582 struct kvm_userspace_memory_region *mem,
1583 int user_alloc)
1584 {
1585 unsigned long i;
1586 unsigned long pfn;
1587 int npages = memslot->npages;
1588 unsigned long base_gfn = memslot->base_gfn;
1589
1590 if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
1591 return -ENOMEM;
1592
1593 for (i = 0; i < npages; i++) {
1594 pfn = gfn_to_pfn(kvm, base_gfn + i);
1595 if (!kvm_is_mmio_pfn(pfn)) {
1596 kvm_set_pmt_entry(kvm, base_gfn + i,
1597 pfn << PAGE_SHIFT,
1598 _PAGE_AR_RWX | _PAGE_MA_WB);
1599 memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1600 } else {
1601 kvm_set_pmt_entry(kvm, base_gfn + i,
1602 GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1603 _PAGE_MA_UC);
1604 memslot->rmap[i] = 0;
1605 }
1606 }
1607
1608 return 0;
1609 }
1610
1611 void kvm_arch_commit_memory_region(struct kvm *kvm,
1612 struct kvm_userspace_memory_region *mem,
1613 struct kvm_memory_slot old,
1614 int user_alloc)
1615 {
1616 return;
1617 }
1618
1619 void kvm_arch_flush_shadow(struct kvm *kvm)
1620 {
1621 kvm_flush_remote_tlbs(kvm);
1622 }
1623
1624 long kvm_arch_dev_ioctl(struct file *filp,
1625 unsigned int ioctl, unsigned long arg)
1626 {
1627 return -EINVAL;
1628 }
1629
1630 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1631 {
1632 kvm_vcpu_uninit(vcpu);
1633 }
1634
1635 static int vti_cpu_has_kvm_support(void)
1636 {
1637 long avail = 1, status = 1, control = 1;
1638 long ret;
1639
1640 ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1641 if (ret)
1642 goto out;
1643
1644 if (!(avail & PAL_PROC_VM_BIT))
1645 goto out;
1646
1647 printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1648
1649 ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1650 if (ret)
1651 goto out;
1652 printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1653
1654 if (!(vp_env_info & VP_OPCODE)) {
1655 printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1656 "vm_env_info:0x%lx\n", vp_env_info);
1657 }
1658
1659 return 1;
1660 out:
1661 return 0;
1662 }
1663
1664
1665 /*
1666 * On SN2, the ITC isn't stable, so copy in fast path code to use the
1667 * SN2 RTC, replacing the ITC based default verion.
1668 */
1669 static void kvm_patch_vmm(struct kvm_vmm_info *vmm_info,
1670 struct module *module)
1671 {
1672 unsigned long new_ar, new_ar_sn2;
1673 unsigned long module_base;
1674
1675 if (!ia64_platform_is("sn2"))
1676 return;
1677
1678 module_base = (unsigned long)module->module_core;
1679
1680 new_ar = kvm_vmm_base + vmm_info->patch_mov_ar - module_base;
1681 new_ar_sn2 = kvm_vmm_base + vmm_info->patch_mov_ar_sn2 - module_base;
1682
1683 printk(KERN_INFO "kvm: Patching ITC emulation to use SGI SN2 RTC "
1684 "as source\n");
1685
1686 /*
1687 * Copy the SN2 version of mov_ar into place. They are both
1688 * the same size, so 6 bundles is sufficient (6 * 0x10).
1689 */
1690 memcpy((void *)new_ar, (void *)new_ar_sn2, 0x60);
1691 }
1692
1693 static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1694 struct module *module)
1695 {
1696 unsigned long module_base;
1697 unsigned long vmm_size;
1698
1699 unsigned long vmm_offset, func_offset, fdesc_offset;
1700 struct fdesc *p_fdesc;
1701
1702 BUG_ON(!module);
1703
1704 if (!kvm_vmm_base) {
1705 printk("kvm: kvm area hasn't been initialized yet!!\n");
1706 return -EFAULT;
1707 }
1708
1709 /*Calculate new position of relocated vmm module.*/
1710 module_base = (unsigned long)module->module_core;
1711 vmm_size = module->core_size;
1712 if (unlikely(vmm_size > KVM_VMM_SIZE))
1713 return -EFAULT;
1714
1715 memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1716 kvm_patch_vmm(vmm_info, module);
1717 kvm_flush_icache(kvm_vmm_base, vmm_size);
1718
1719 /*Recalculate kvm_vmm_info based on new VMM*/
1720 vmm_offset = vmm_info->vmm_ivt - module_base;
1721 kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1722 printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1723 kvm_vmm_info->vmm_ivt);
1724
1725 fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1726 kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1727 fdesc_offset);
1728 func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1729 p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1730 p_fdesc->ip = KVM_VMM_BASE + func_offset;
1731 p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1732
1733 printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1734 KVM_VMM_BASE+func_offset);
1735
1736 fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1737 kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1738 fdesc_offset);
1739 func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1740 p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1741 p_fdesc->ip = KVM_VMM_BASE + func_offset;
1742 p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1743
1744 kvm_vmm_gp = p_fdesc->gp;
1745
1746 printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1747 kvm_vmm_info->vmm_entry);
1748 printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1749 KVM_VMM_BASE + func_offset);
1750
1751 return 0;
1752 }
1753
1754 int kvm_arch_init(void *opaque)
1755 {
1756 int r;
1757 struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1758
1759 if (!vti_cpu_has_kvm_support()) {
1760 printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1761 r = -EOPNOTSUPP;
1762 goto out;
1763 }
1764
1765 if (kvm_vmm_info) {
1766 printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1767 r = -EEXIST;
1768 goto out;
1769 }
1770
1771 r = -ENOMEM;
1772 kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1773 if (!kvm_vmm_info)
1774 goto out;
1775
1776 if (kvm_alloc_vmm_area())
1777 goto out_free0;
1778
1779 r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1780 if (r)
1781 goto out_free1;
1782
1783 return 0;
1784
1785 out_free1:
1786 kvm_free_vmm_area();
1787 out_free0:
1788 kfree(kvm_vmm_info);
1789 out:
1790 return r;
1791 }
1792
1793 void kvm_arch_exit(void)
1794 {
1795 kvm_free_vmm_area();
1796 kfree(kvm_vmm_info);
1797 kvm_vmm_info = NULL;
1798 }
1799
1800 static int kvm_ia64_sync_dirty_log(struct kvm *kvm,
1801 struct kvm_dirty_log *log)
1802 {
1803 struct kvm_memory_slot *memslot;
1804 int r, i;
1805 long base;
1806 unsigned long n;
1807 unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
1808 offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
1809
1810 r = -EINVAL;
1811 if (log->slot >= KVM_MEMORY_SLOTS)
1812 goto out;
1813
1814 memslot = &kvm->memslots->memslots[log->slot];
1815 r = -ENOENT;
1816 if (!memslot->dirty_bitmap)
1817 goto out;
1818
1819 n = kvm_dirty_bitmap_bytes(memslot);
1820 base = memslot->base_gfn / BITS_PER_LONG;
1821
1822 for (i = 0; i < n/sizeof(long); ++i) {
1823 memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1824 dirty_bitmap[base + i] = 0;
1825 }
1826 r = 0;
1827 out:
1828 return r;
1829 }
1830
1831 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1832 struct kvm_dirty_log *log)
1833 {
1834 int r;
1835 unsigned long n;
1836 struct kvm_memory_slot *memslot;
1837 int is_dirty = 0;
1838
1839 mutex_lock(&kvm->slots_lock);
1840 spin_lock(&kvm->arch.dirty_log_lock);
1841
1842 r = kvm_ia64_sync_dirty_log(kvm, log);
1843 if (r)
1844 goto out;
1845
1846 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1847 if (r)
1848 goto out;
1849
1850 /* If nothing is dirty, don't bother messing with page tables. */
1851 if (is_dirty) {
1852 kvm_flush_remote_tlbs(kvm);
1853 memslot = &kvm->memslots->memslots[log->slot];
1854 n = kvm_dirty_bitmap_bytes(memslot);
1855 memset(memslot->dirty_bitmap, 0, n);
1856 }
1857 r = 0;
1858 out:
1859 mutex_unlock(&kvm->slots_lock);
1860 spin_unlock(&kvm->arch.dirty_log_lock);
1861 return r;
1862 }
1863
1864 int kvm_arch_hardware_setup(void)
1865 {
1866 return 0;
1867 }
1868
1869 void kvm_arch_hardware_unsetup(void)
1870 {
1871 }
1872
1873 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
1874 {
1875 int me;
1876 int cpu = vcpu->cpu;
1877
1878 if (waitqueue_active(&vcpu->wq))
1879 wake_up_interruptible(&vcpu->wq);
1880
1881 me = get_cpu();
1882 if (cpu != me && (unsigned) cpu < nr_cpu_ids && cpu_online(cpu))
1883 if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests))
1884 smp_send_reschedule(cpu);
1885 put_cpu();
1886 }
1887
1888 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)
1889 {
1890 return __apic_accept_irq(vcpu, irq->vector);
1891 }
1892
1893 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1894 {
1895 return apic->vcpu->vcpu_id == dest;
1896 }
1897
1898 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1899 {
1900 return 0;
1901 }
1902
1903 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
1904 {
1905 return vcpu1->arch.xtp - vcpu2->arch.xtp;
1906 }
1907
1908 int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
1909 int short_hand, int dest, int dest_mode)
1910 {
1911 struct kvm_lapic *target = vcpu->arch.apic;
1912 return (dest_mode == 0) ?
1913 kvm_apic_match_physical_addr(target, dest) :
1914 kvm_apic_match_logical_addr(target, dest);
1915 }
1916
1917 static int find_highest_bits(int *dat)
1918 {
1919 u32 bits, bitnum;
1920 int i;
1921
1922 /* loop for all 256 bits */
1923 for (i = 7; i >= 0 ; i--) {
1924 bits = dat[i];
1925 if (bits) {
1926 bitnum = fls(bits);
1927 return i * 32 + bitnum - 1;
1928 }
1929 }
1930
1931 return -1;
1932 }
1933
1934 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1935 {
1936 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1937
1938 if (vpd->irr[0] & (1UL << NMI_VECTOR))
1939 return NMI_VECTOR;
1940 if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1941 return ExtINT_VECTOR;
1942
1943 return find_highest_bits((int *)&vpd->irr[0]);
1944 }
1945
1946 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1947 {
1948 return vcpu->arch.timer_fired;
1949 }
1950
1951 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
1952 {
1953 return gfn;
1954 }
1955
1956 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1957 {
1958 return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) ||
1959 (kvm_highest_pending_irq(vcpu) != -1);
1960 }
1961
1962 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1963 struct kvm_mp_state *mp_state)
1964 {
1965 vcpu_load(vcpu);
1966 mp_state->mp_state = vcpu->arch.mp_state;
1967 vcpu_put(vcpu);
1968 return 0;
1969 }
1970
1971 static int vcpu_reset(struct kvm_vcpu *vcpu)
1972 {
1973 int r;
1974 long psr;
1975 local_irq_save(psr);
1976 r = kvm_insert_vmm_mapping(vcpu);
1977 local_irq_restore(psr);
1978 if (r)
1979 goto fail;
1980
1981 vcpu->arch.launched = 0;
1982 kvm_arch_vcpu_uninit(vcpu);
1983 r = kvm_arch_vcpu_init(vcpu);
1984 if (r)
1985 goto fail;
1986
1987 kvm_purge_vmm_mapping(vcpu);
1988 r = 0;
1989 fail:
1990 return r;
1991 }
1992
1993 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1994 struct kvm_mp_state *mp_state)
1995 {
1996 int r = 0;
1997
1998 vcpu_load(vcpu);
1999 vcpu->arch.mp_state = mp_state->mp_state;
2000 if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
2001 r = vcpu_reset(vcpu);
2002 vcpu_put(vcpu);
2003 return r;
2004 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree