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KVM: change the way how lowest priority vcpu is calculated
[deliverable/linux.git] / arch / ia64 / kvm / kvm-ia64.c
CommitLineData
b024b793
XZ		 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>
19de40a8 34#include <linux/iommu.h>
2381ad24 35#include <linux/intel-iommu.h>
b024b793
XZ		 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>
9f726323 43#include <asm/elf.h>
b024b793
XZ		 44
45#include "misc.h"
46#include "vti.h"
47#include "iodev.h"
48#include "ioapic.h"
49#include "lapic.h"
2f749771 50#include "irq.h"
b024b793
XZ		 51
52static unsigned long kvm_vmm_base;
53static unsigned long kvm_vsa_base;
54static unsigned long kvm_vm_buffer;
55static unsigned long kvm_vm_buffer_size;
56unsigned long kvm_vmm_gp;
57
58static long vp_env_info;
59
60static struct kvm_vmm_info *kvm_vmm_info;
61
62static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu);
63
64struct kvm_stats_debugfs_item debugfs_entries[] = {
65 { NULL }
66};
67
b024b793
XZ		 68static void kvm_flush_icache(unsigned long start, unsigned long len)
69{
70 int l;
71
72 for (l = 0; l < (len + 32); l += 32)
7120569c 73 ia64_fc((void *)(start + l));
b024b793
XZ		 74
75 ia64_sync_i();
76 ia64_srlz_i();
77}
78
79static void kvm_flush_tlb_all(void)
80{
81 unsigned long i, j, count0, count1, stride0, stride1, addr;
82 long flags;
83
84 addr = local_cpu_data->ptce_base;
85 count0 = local_cpu_data->ptce_count[0];
86 count1 = local_cpu_data->ptce_count[1];
87 stride0 = local_cpu_data->ptce_stride[0];
88 stride1 = local_cpu_data->ptce_stride[1];
89
90 local_irq_save(flags);
91 for (i = 0; i < count0; ++i) {
92 for (j = 0; j < count1; ++j) {
93 ia64_ptce(addr);
94 addr += stride1;
95 }
96 addr += stride0;
97 }
98 local_irq_restore(flags);
99 ia64_srlz_i(); /* srlz.i implies srlz.d */
100}
101
102long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler)
103{
104 struct ia64_pal_retval iprv;
105
106 PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva,
107 (u64)opt_handler);
108
109 return iprv.status;
110}
111
112static DEFINE_SPINLOCK(vp_lock);
113
114void kvm_arch_hardware_enable(void *garbage)
115{
116 long status;
117 long tmp_base;
118 unsigned long pte;
119 unsigned long saved_psr;
120 int slot;
121
122 pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
123 PAGE_KERNEL));
124 local_irq_save(saved_psr);
125 slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
cab7a1ee 126 local_irq_restore(saved_psr);
b024b793
XZ		 127 if (slot < 0)
128 return;
b024b793
XZ		 129
130 spin_lock(&vp_lock);
131 status = ia64_pal_vp_init_env(kvm_vsa_base ?
132 VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
133 __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
134 if (status != 0) {
135 printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
136 return ;
137 }
138
139 if (!kvm_vsa_base) {
140 kvm_vsa_base = tmp_base;
141 printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
142 }
143 spin_unlock(&vp_lock);
144 ia64_ptr_entry(0x3, slot);
145}
146
147void kvm_arch_hardware_disable(void *garbage)
148{
149
150 long status;
151 int slot;
152 unsigned long pte;
153 unsigned long saved_psr;
154 unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
155
156 pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
157 PAGE_KERNEL));
158
159 local_irq_save(saved_psr);
160 slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
cab7a1ee 161 local_irq_restore(saved_psr);
b024b793
XZ		 162 if (slot < 0)
163 return;
b024b793
XZ		 164
165 status = ia64_pal_vp_exit_env(host_iva);
166 if (status)
167 printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
168 status);
169 ia64_ptr_entry(0x3, slot);
170}
171
172void kvm_arch_check_processor_compat(void *rtn)
173{
174 *(int *)rtn = 0;
175}
176
177int kvm_dev_ioctl_check_extension(long ext)
178{
179
180 int r;
181
182 switch (ext) {
183 case KVM_CAP_IRQCHIP:
8c4b537d 184 case KVM_CAP_MP_STATE:
4925663a 185 case KVM_CAP_IRQ_INJECT_STATUS:
b024b793
XZ		 186 r = 1;
187 break;
7f39f8ac
LV		 188 case KVM_CAP_COALESCED_MMIO:
189 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
190 break;
2381ad24 191 case KVM_CAP_IOMMU:
19de40a8 192 r = iommu_found();
2381ad24 193 break;
b024b793
XZ		 194 default:
195 r = 0;
196 }
197 return r;
198
199}
200
201static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
92760499 202 gpa_t addr, int len, int is_write)
b024b793
XZ		 203{
204 struct kvm_io_device *dev;
205
92760499 206 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, is_write);
b024b793
XZ		 207
208 return dev;
209}
210
211static 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
218static 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;
237mmio:
92760499 238 mmio_dev = vcpu_find_mmio_dev(vcpu, p->addr, p->size, !p->dir);
b024b793
XZ		 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
254static 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
269static 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 */
290static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm,
291 uint64_t vector)
292{
293 switch (dm) {
294 case SAPIC_FIXED:
6da7e3f6 295 kvm_apic_set_irq(vcpu, vector, dm, 0);
b024b793
XZ		 296 break;
297 case SAPIC_NMI:
6da7e3f6 298 kvm_apic_set_irq(vcpu, 2, dm, 0);
b024b793
XZ		 299 break;
300 case SAPIC_EXTINT:
6da7e3f6 301 kvm_apic_set_irq(vcpu, 0, dm, 0);
b024b793
XZ		 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
311static 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
934d534f 317 for (i = 0; i < kvm->arch.online_vcpus; i++) {
b024b793
XZ		 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
328static 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
a4535290 346 target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
b024b793
XZ		 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
358struct call_data {
359 struct kvm_ptc_g ptc_g_data;
360 struct kvm_vcpu *vcpu;
361};
362
363static 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
382static 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;
decc9016 388
b024b793
XZ		 389 call_data.ptc_g_data = p->u.ptc_g_data;
390
934d534f 391 for (i = 0; i < kvm->arch.online_vcpus; i++) {
b024b793 392 if (!kvm->vcpus[i] || kvm->vcpus[i]->arch.mp_state ==
a4535290 393 KVM_MP_STATE_UNINITIALIZED ||
b024b793
XZ		 394 vcpu == kvm->vcpus[i])
395 continue;
396
397 if (waitqueue_active(&kvm->vcpus[i]->wq))
398 wake_up_interruptible(&kvm->vcpus[i]->wq);
399
400 if (kvm->vcpus[i]->cpu != -1) {
401 call_data.vcpu = kvm->vcpus[i];
402 smp_call_function_single(kvm->vcpus[i]->cpu,
2f73ccab 403 vcpu_global_purge, &call_data, 1);
b024b793
XZ		 404 } else
405 printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
406
407 }
408 return 1;
409}
410
411static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
412{
413 return 1;
414}
415
416int kvm_emulate_halt(struct kvm_vcpu *vcpu)
417{
418
419 ktime_t kt;
420 long itc_diff;
421 unsigned long vcpu_now_itc;
b024b793
XZ		 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
decc9016 427 if (irqchip_in_kernel(vcpu->kvm)) {
b024b793 428
decc9016 429 vcpu_now_itc = ia64_getreg(_IA64_REG_AR_ITC) + vcpu->arch.itc_offset;
b024b793 430
decc9016
XZ		 431 if (time_after(vcpu_now_itc, vpd->itm)) {
432 vcpu->arch.timer_check = 1;
433 return 1;
434 }
435 itc_diff = vpd->itm - vcpu_now_itc;
436 if (itc_diff < 0)
437 itc_diff = -itc_diff;
438
439 expires = div64_u64(itc_diff, cyc_per_usec);
440 kt = ktime_set(0, 1000 * expires);
441
decc9016
XZ		 442 vcpu->arch.ht_active = 1;
443 hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
b024b793 444
a4535290 445 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
b024b793
XZ		 446 kvm_vcpu_block(vcpu);
447 hrtimer_cancel(p_ht);
448 vcpu->arch.ht_active = 0;
449
decc9016
XZ		 450 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests))
451 if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
452 vcpu->arch.mp_state =
453 KVM_MP_STATE_RUNNABLE;
decc9016 454
a4535290 455 if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
b024b793
XZ		 456 return -EINTR;
457 return 1;
458 } else {
459 printk(KERN_ERR"kvm: Unsupported userspace halt!");
460 return 0;
461 }
462}
463
464static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
465 struct kvm_run *kvm_run)
466{
467 kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
468 return 0;
469}
470
471static int handle_external_interrupt(struct kvm_vcpu *vcpu,
472 struct kvm_run *kvm_run)
473{
474 return 1;
475}
476
7d637978
XZ		 477static int handle_vcpu_debug(struct kvm_vcpu *vcpu,
478 struct kvm_run *kvm_run)
479{
480 printk("VMM: %s", vcpu->arch.log_buf);
481 return 1;
482}
483
b024b793
XZ		 484static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
485 struct kvm_run *kvm_run) = {
486 [EXIT_REASON_VM_PANIC] = handle_vm_error,
487 [EXIT_REASON_MMIO_INSTRUCTION] = handle_mmio,
488 [EXIT_REASON_PAL_CALL] = handle_pal_call,
489 [EXIT_REASON_SAL_CALL] = handle_sal_call,
490 [EXIT_REASON_SWITCH_RR6] = handle_switch_rr6,
491 [EXIT_REASON_VM_DESTROY] = handle_vm_shutdown,
492 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
493 [EXIT_REASON_IPI] = handle_ipi,
494 [EXIT_REASON_PTC_G] = handle_global_purge,
7d637978 495 [EXIT_REASON_DEBUG] = handle_vcpu_debug,
b024b793
XZ		 496
497};
498
499static const int kvm_vti_max_exit_handlers =
500 sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
501
b024b793
XZ		 502static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
503{
504 struct exit_ctl_data *p_exit_data;
505
506 p_exit_data = kvm_get_exit_data(vcpu);
507 return p_exit_data->exit_reason;
508}
509
510/*
511 * The guest has exited. See if we can fix it or if we need userspace
512 * assistance.
513 */
514static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
515{
516 u32 exit_reason = kvm_get_exit_reason(vcpu);
517 vcpu->arch.last_exit = exit_reason;
518
519 if (exit_reason < kvm_vti_max_exit_handlers
520 && kvm_vti_exit_handlers[exit_reason])
521 return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
522 else {
523 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
524 kvm_run->hw.hardware_exit_reason = exit_reason;
525 }
526 return 0;
527}
528
529static inline void vti_set_rr6(unsigned long rr6)
530{
531 ia64_set_rr(RR6, rr6);
532 ia64_srlz_i();
533}
534
535static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
536{
537 unsigned long pte;
538 struct kvm *kvm = vcpu->kvm;
539 int r;
540
541 /*Insert a pair of tr to map vmm*/
542 pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
543 r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
544 if (r < 0)
545 goto out;
546 vcpu->arch.vmm_tr_slot = r;
547 /*Insert a pairt of tr to map data of vm*/
548 pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
549 r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
550 pte, KVM_VM_DATA_SHIFT);
551 if (r < 0)
552 goto out;
553 vcpu->arch.vm_tr_slot = r;
554 r = 0;
555out:
556 return r;
557
558}
559
560static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
561{
562
563 ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
564 ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
565
566}
567
568static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
569{
570 int cpu = smp_processor_id();
571
572 if (vcpu->arch.last_run_cpu != cpu ||
573 per_cpu(last_vcpu, cpu) != vcpu) {
574 per_cpu(last_vcpu, cpu) = vcpu;
575 vcpu->arch.last_run_cpu = cpu;
576 kvm_flush_tlb_all();
577 }
578
579 vcpu->arch.host_rr6 = ia64_get_rr(RR6);
580 vti_set_rr6(vcpu->arch.vmm_rr);
581 return kvm_insert_vmm_mapping(vcpu);
582}
583static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
584{
585 kvm_purge_vmm_mapping(vcpu);
586 vti_set_rr6(vcpu->arch.host_rr6);
587}
588
589static int vti_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
590{
591 union context *host_ctx, *guest_ctx;
592 int r;
593
594 /*Get host and guest context with guest address space.*/
595 host_ctx = kvm_get_host_context(vcpu);
596 guest_ctx = kvm_get_guest_context(vcpu);
597
598 r = kvm_vcpu_pre_transition(vcpu);
599 if (r < 0)
600 goto out;
601 kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
602 kvm_vcpu_post_transition(vcpu);
603 r = 0;
604out:
605 return r;
606}
607
608static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
609{
610 int r;
611
612again:
b024b793 613 if (signal_pending(current)) {
b024b793
XZ		 614 r = -EINTR;
615 kvm_run->exit_reason = KVM_EXIT_INTR;
616 goto out;
617 }
618
d24d2c1c
JS		 619 /*
620 * down_read() may sleep and return with interrupts enabled
621 */
622 down_read(&vcpu->kvm->slots_lock);
623
624 preempt_disable();
625 local_irq_disable();
626
b024b793
XZ		 627 vcpu->guest_mode = 1;
628 kvm_guest_enter();
b024b793
XZ		 629 r = vti_vcpu_run(vcpu, kvm_run);
630 if (r < 0) {
631 local_irq_enable();
632 preempt_enable();
633 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
634 goto out;
635 }
636
637 vcpu->arch.launched = 1;
638 vcpu->guest_mode = 0;
639 local_irq_enable();
640
641 /*
642 * We must have an instruction between local_irq_enable() and
643 * kvm_guest_exit(), so the timer interrupt isn't delayed by
644 * the interrupt shadow. The stat.exits increment will do nicely.
645 * But we need to prevent reordering, hence this barrier():
646 */
647 barrier();
b024b793 648 kvm_guest_exit();
decc9016 649 up_read(&vcpu->kvm->slots_lock);
b024b793
XZ		 650 preempt_enable();
651
652 r = kvm_handle_exit(kvm_run, vcpu);
653
654 if (r > 0) {
655 if (!need_resched())
656 goto again;
657 }
658
659out:
660 if (r > 0) {
661 kvm_resched(vcpu);
662 goto again;
663 }
664
665 return r;
666}
667
668static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
669{
670 struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
671
672 if (!vcpu->mmio_is_write)
673 memcpy(&p->data, vcpu->mmio_data, 8);
674 p->state = STATE_IORESP_READY;
675}
676
677int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
678{
679 int r;
680 sigset_t sigsaved;
681
682 vcpu_load(vcpu);
683
a2e4e289
XZ		 684 if (vcpu->sigset_active)
685 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
686
a4535290 687 if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
b024b793 688 kvm_vcpu_block(vcpu);
decc9016 689 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
a2e4e289
XZ		 690 r = -EAGAIN;
691 goto out;
b024b793
XZ		 692 }
693
b024b793
XZ		 694 if (vcpu->mmio_needed) {
695 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
696 kvm_set_mmio_data(vcpu);
697 vcpu->mmio_read_completed = 1;
698 vcpu->mmio_needed = 0;
699 }
700 r = __vcpu_run(vcpu, kvm_run);
a2e4e289 701out:
b024b793
XZ		 702 if (vcpu->sigset_active)
703 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
704
705 vcpu_put(vcpu);
706 return r;
707}
708
b024b793
XZ		 709static struct kvm *kvm_alloc_kvm(void)
710{
711
712 struct kvm *kvm;
713 uint64_t vm_base;
714
a917f7af
XZ		 715 BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
716
b024b793
XZ		 717 vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
718
719 if (!vm_base)
720 return ERR_PTR(-ENOMEM);
b024b793 721
b024b793 722 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
a917f7af
XZ		 723 kvm = (struct kvm *)(vm_base +
724 offsetof(struct kvm_vm_data, kvm_vm_struct));
b024b793 725 kvm->arch.vm_base = vm_base;
a917f7af 726 printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
b024b793
XZ		 727
728 return kvm;
729}
730
731struct kvm_io_range {
732 unsigned long start;
733 unsigned long size;
734 unsigned long type;
735};
736
737static const struct kvm_io_range io_ranges[] = {
738 {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
739 {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
740 {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
741 {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
742 {PIB_START, PIB_SIZE, GPFN_PIB},
743};
744
745static void kvm_build_io_pmt(struct kvm *kvm)
746{
747 unsigned long i, j;
748
749 /* Mark I/O ranges */
750 for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
751 i++) {
752 for (j = io_ranges[i].start;
753 j < io_ranges[i].start + io_ranges[i].size;
754 j += PAGE_SIZE)
755 kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
756 io_ranges[i].type, 0);
757 }
758
759}
760
761/*Use unused rids to virtualize guest rid.*/
762#define GUEST_PHYSICAL_RR0 0x1739
763#define GUEST_PHYSICAL_RR4 0x2739
764#define VMM_INIT_RR 0x1660
765
766static void kvm_init_vm(struct kvm *kvm)
767{
b024b793
XZ		 768 BUG_ON(!kvm);
769
770 kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
771 kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
772 kvm->arch.vmm_init_rr = VMM_INIT_RR;
773
b024b793
XZ		 774 /*
775 *Fill P2M entries for MMIO/IO ranges
776 */
777 kvm_build_io_pmt(kvm);
778
2381ad24 779 INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
5550af4d
SY		 780
781 /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
782 set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
b024b793
XZ		 783}
784
785struct kvm *kvm_arch_create_vm(void)
786{
787 struct kvm *kvm = kvm_alloc_kvm();
788
789 if (IS_ERR(kvm))
790 return ERR_PTR(-ENOMEM);
791 kvm_init_vm(kvm);
792
934d534f
JS		 793 kvm->arch.online_vcpus = 0;
794
b024b793
XZ		 795 return kvm;
796
797}
798
799static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
800 struct kvm_irqchip *chip)
801{
802 int r;
803
804 r = 0;
805 switch (chip->chip_id) {
806 case KVM_IRQCHIP_IOAPIC:
807 memcpy(&chip->chip.ioapic, ioapic_irqchip(kvm),
808 sizeof(struct kvm_ioapic_state));
809 break;
810 default:
811 r = -EINVAL;
812 break;
813 }
814 return r;
815}
816
817static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
818{
819 int r;
820
821 r = 0;
822 switch (chip->chip_id) {
823 case KVM_IRQCHIP_IOAPIC:
824 memcpy(ioapic_irqchip(kvm),
825 &chip->chip.ioapic,
826 sizeof(struct kvm_ioapic_state));
827 break;
828 default:
829 r = -EINVAL;
830 break;
831 }
832 return r;
833}
834
835#define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
836
837int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
838{
b024b793 839 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
042b26ed 840 int i;
b024b793
XZ		 841
842 vcpu_load(vcpu);
843
844 for (i = 0; i < 16; i++) {
845 vpd->vgr[i] = regs->vpd.vgr[i];
846 vpd->vbgr[i] = regs->vpd.vbgr[i];
847 }
848 for (i = 0; i < 128; i++)
849 vpd->vcr[i] = regs->vpd.vcr[i];
850 vpd->vhpi = regs->vpd.vhpi;
851 vpd->vnat = regs->vpd.vnat;
852 vpd->vbnat = regs->vpd.vbnat;
853 vpd->vpsr = regs->vpd.vpsr;
854
855 vpd->vpr = regs->vpd.vpr;
856
042b26ed 857 memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
b024b793
XZ		 858
859 RESTORE_REGS(mp_state);
860 RESTORE_REGS(vmm_rr);
861 memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
862 memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
863 RESTORE_REGS(itr_regions);
864 RESTORE_REGS(dtr_regions);
865 RESTORE_REGS(tc_regions);
866 RESTORE_REGS(irq_check);
867 RESTORE_REGS(itc_check);
868 RESTORE_REGS(timer_check);
869 RESTORE_REGS(timer_pending);
870 RESTORE_REGS(last_itc);
871 for (i = 0; i < 8; i++) {
872 vcpu->arch.vrr[i] = regs->vrr[i];
873 vcpu->arch.ibr[i] = regs->ibr[i];
874 vcpu->arch.dbr[i] = regs->dbr[i];
875 }
876 for (i = 0; i < 4; i++)
877 vcpu->arch.insvc[i] = regs->insvc[i];
878 RESTORE_REGS(xtp);
879 RESTORE_REGS(metaphysical_rr0);
880 RESTORE_REGS(metaphysical_rr4);
881 RESTORE_REGS(metaphysical_saved_rr0);
882 RESTORE_REGS(metaphysical_saved_rr4);
883 RESTORE_REGS(fp_psr);
884 RESTORE_REGS(saved_gp);
885
886 vcpu->arch.irq_new_pending = 1;
887 vcpu->arch.itc_offset = regs->saved_itc - ia64_getreg(_IA64_REG_AR_ITC);
888 set_bit(KVM_REQ_RESUME, &vcpu->requests);
889
890 vcpu_put(vcpu);
042b26ed
JS		 891
892 return 0;
b024b793
XZ		 893}
894
895long kvm_arch_vm_ioctl(struct file *filp,
896 unsigned int ioctl, unsigned long arg)
897{
898 struct kvm *kvm = filp->private_data;
899 void __user *argp = (void __user *)arg;
900 int r = -EINVAL;
901
902 switch (ioctl) {
903 case KVM_SET_MEMORY_REGION: {
904 struct kvm_memory_region kvm_mem;
905 struct kvm_userspace_memory_region kvm_userspace_mem;
906
907 r = -EFAULT;
908 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
909 goto out;
910 kvm_userspace_mem.slot = kvm_mem.slot;
911 kvm_userspace_mem.flags = kvm_mem.flags;
912 kvm_userspace_mem.guest_phys_addr =
913 kvm_mem.guest_phys_addr;
914 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
915 r = kvm_vm_ioctl_set_memory_region(kvm,
916 &kvm_userspace_mem, 0);
917 if (r)
918 goto out;
919 break;
920 }
921 case KVM_CREATE_IRQCHIP:
922 r = -EFAULT;
923 r = kvm_ioapic_init(kvm);
924 if (r)
925 goto out;
399ec807
AK		 926 r = kvm_setup_default_irq_routing(kvm);
927 if (r) {
928 kfree(kvm->arch.vioapic);
929 goto out;
930 }
b024b793 931 break;
4925663a 932 case KVM_IRQ_LINE_STATUS:
b024b793
XZ		 933 case KVM_IRQ_LINE: {
934 struct kvm_irq_level irq_event;
935
936 r = -EFAULT;
937 if (copy_from_user(&irq_event, argp, sizeof irq_event))
938 goto out;
939 if (irqchip_in_kernel(kvm)) {
4925663a 940 __s32 status;
b024b793 941 mutex_lock(&kvm->lock);
4925663a 942 status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
5550af4d 943 irq_event.irq, irq_event.level);
b024b793 944 mutex_unlock(&kvm->lock);
4925663a
GN		 945 if (ioctl == KVM_IRQ_LINE_STATUS) {
946 irq_event.status = status;
947 if (copy_to_user(argp, &irq_event,
948 sizeof irq_event))
949 goto out;
950 }
b024b793
XZ		 951 r = 0;
952 }
953 break;
954 }
955 case KVM_GET_IRQCHIP: {
956 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
957 struct kvm_irqchip chip;
958
959 r = -EFAULT;
960 if (copy_from_user(&chip, argp, sizeof chip))
961 goto out;
962 r = -ENXIO;
963 if (!irqchip_in_kernel(kvm))
964 goto out;
965 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
966 if (r)
967 goto out;
968 r = -EFAULT;
969 if (copy_to_user(argp, &chip, sizeof chip))
970 goto out;
971 r = 0;
972 break;
973 }
974 case KVM_SET_IRQCHIP: {
975 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
976 struct kvm_irqchip chip;
977
978 r = -EFAULT;
979 if (copy_from_user(&chip, argp, sizeof chip))
980 goto out;
981 r = -ENXIO;
982 if (!irqchip_in_kernel(kvm))
983 goto out;
984 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
985 if (r)
986 goto out;
987 r = 0;
988 break;
989 }
990 default:
991 ;
992 }
993out:
994 return r;
995}
996
997int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
998 struct kvm_sregs *sregs)
999{
1000 return -EINVAL;
1001}
1002
1003int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1004 struct kvm_sregs *sregs)
1005{
1006 return -EINVAL;
1007
1008}
1009int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1010 struct kvm_translation *tr)
1011{
1012
1013 return -EINVAL;
1014}
1015
1016static int kvm_alloc_vmm_area(void)
1017{
1018 if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1019 kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1020 get_order(KVM_VMM_SIZE));
1021 if (!kvm_vmm_base)
1022 return -ENOMEM;
1023
1024 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1025 kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1026
1027 printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1028 kvm_vmm_base, kvm_vm_buffer);
1029 }
1030
1031 return 0;
1032}
1033
1034static void kvm_free_vmm_area(void)
1035{
1036 if (kvm_vmm_base) {
1037 /*Zero this area before free to avoid bits leak!!*/
1038 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1039 free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1040 kvm_vmm_base = 0;
1041 kvm_vm_buffer = 0;
1042 kvm_vsa_base = 0;
1043 }
1044}
1045
b024b793
XZ		 1046static void vti_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1047{
1048}
1049
1050static int vti_init_vpd(struct kvm_vcpu *vcpu)
1051{
1052 int i;
1053 union cpuid3_t cpuid3;
1054 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1055
1056 if (IS_ERR(vpd))
1057 return PTR_ERR(vpd);
1058
1059 /* CPUID init */
1060 for (i = 0; i < 5; i++)
1061 vpd->vcpuid[i] = ia64_get_cpuid(i);
1062
1063 /* Limit the CPUID number to 5 */
1064 cpuid3.value = vpd->vcpuid[3];
1065 cpuid3.number = 4; /* 5 - 1 */
1066 vpd->vcpuid[3] = cpuid3.value;
1067
1068 /*Set vac and vdc fields*/
1069 vpd->vac.a_from_int_cr = 1;
1070 vpd->vac.a_to_int_cr = 1;
1071 vpd->vac.a_from_psr = 1;
1072 vpd->vac.a_from_cpuid = 1;
1073 vpd->vac.a_cover = 1;
1074 vpd->vac.a_bsw = 1;
1075 vpd->vac.a_int = 1;
1076 vpd->vdc.d_vmsw = 1;
1077
1078 /*Set virtual buffer*/
1079 vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
1080
1081 return 0;
1082}
1083
1084static int vti_create_vp(struct kvm_vcpu *vcpu)
1085{
1086 long ret;
1087 struct vpd *vpd = vcpu->arch.vpd;
1088 unsigned long vmm_ivt;
1089
1090 vmm_ivt = kvm_vmm_info->vmm_ivt;
1091
1092 printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
1093
1094 ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
1095
1096 if (ret) {
1097 printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
1098 return -EINVAL;
1099 }
1100 return 0;
1101}
1102
1103static void init_ptce_info(struct kvm_vcpu *vcpu)
1104{
1105 ia64_ptce_info_t ptce = {0};
1106
1107 ia64_get_ptce(&ptce);
1108 vcpu->arch.ptce_base = ptce.base;
1109 vcpu->arch.ptce_count[0] = ptce.count[0];
1110 vcpu->arch.ptce_count[1] = ptce.count[1];
1111 vcpu->arch.ptce_stride[0] = ptce.stride[0];
1112 vcpu->arch.ptce_stride[1] = ptce.stride[1];
1113}
1114
1115static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
1116{
1117 struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
1118
1119 if (hrtimer_cancel(p_ht))
18dd36af 1120 hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
b024b793
XZ		 1121}
1122
1123static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
1124{
1125 struct kvm_vcpu *vcpu;
1126 wait_queue_head_t *q;
1127
1128 vcpu = container_of(data, struct kvm_vcpu, arch.hlt_timer);
decc9016
XZ		 1129 q = &vcpu->wq;
1130
a4535290 1131 if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
b024b793
XZ		 1132 goto out;
1133
decc9016 1134 if (waitqueue_active(q))
b024b793 1135 wake_up_interruptible(q);
decc9016 1136
b024b793 1137out:
decc9016 1138 vcpu->arch.timer_fired = 1;
b024b793
XZ		 1139 vcpu->arch.timer_check = 1;
1140 return HRTIMER_NORESTART;
1141}
1142
1143#define PALE_RESET_ENTRY 0x80000000ffffffb0UL
1144
1145int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1146{
1147 struct kvm_vcpu *v;
1148 int r;
1149 int i;
1150 long itc_offset;
1151 struct kvm *kvm = vcpu->kvm;
1152 struct kvm_pt_regs *regs = vcpu_regs(vcpu);
1153
1154 union context *p_ctx = &vcpu->arch.guest;
1155 struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
1156
1157 /*Init vcpu context for first run.*/
1158 if (IS_ERR(vmm_vcpu))
1159 return PTR_ERR(vmm_vcpu);
1160
1161 if (vcpu->vcpu_id == 0) {
a4535290 1162 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
b024b793
XZ		 1163
1164 /*Set entry address for first run.*/
1165 regs->cr_iip = PALE_RESET_ENTRY;
1166
a917f7af 1167 /*Initialize itc offset for vcpus*/
b024b793 1168 itc_offset = 0UL - ia64_getreg(_IA64_REG_AR_ITC);
934d534f 1169 for (i = 0; i < kvm->arch.online_vcpus; i++) {
a917f7af
XZ		 1170 v = (struct kvm_vcpu *)((char *)vcpu +
1171 sizeof(struct kvm_vcpu_data) * i);
b024b793
XZ		 1172 v->arch.itc_offset = itc_offset;
1173 v->arch.last_itc = 0;
1174 }
1175 } else
a4535290 1176 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
b024b793
XZ		 1177
1178 r = -ENOMEM;
1179 vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
1180 if (!vcpu->arch.apic)
1181 goto out;
1182 vcpu->arch.apic->vcpu = vcpu;
1183
1184 p_ctx->gr[1] = 0;
a917f7af 1185 p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + KVM_STK_OFFSET);
b024b793
XZ		 1186 p_ctx->gr[13] = (unsigned long)vmm_vcpu;
1187 p_ctx->psr = 0x1008522000UL;
1188 p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
1189 p_ctx->caller_unat = 0;
1190 p_ctx->pr = 0x0;
1191 p_ctx->ar[36] = 0x0; /*unat*/
1192 p_ctx->ar[19] = 0x0; /*rnat*/
1193 p_ctx->ar[18] = (unsigned long)vmm_vcpu +
1194 ((sizeof(struct kvm_vcpu)+15) & ~15);
1195 p_ctx->ar[64] = 0x0; /*pfs*/
1196 p_ctx->cr[0] = 0x7e04UL;
1197 p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
1198 p_ctx->cr[8] = 0x3c;
1199
1200 /*Initilize region register*/
1201 p_ctx->rr[0] = 0x30;
1202 p_ctx->rr[1] = 0x30;
1203 p_ctx->rr[2] = 0x30;
1204 p_ctx->rr[3] = 0x30;
1205 p_ctx->rr[4] = 0x30;
1206 p_ctx->rr[5] = 0x30;
1207 p_ctx->rr[7] = 0x30;
1208
1209 /*Initilize branch register 0*/
1210 p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
1211
1212 vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
1213 vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
1214 vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
1215
1216 hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
1217 vcpu->arch.hlt_timer.function = hlt_timer_fn;
1218
1219 vcpu->arch.last_run_cpu = -1;
a917f7af 1220 vcpu->arch.vpd = (struct vpd *)VPD_BASE(vcpu->vcpu_id);
b024b793
XZ		 1221 vcpu->arch.vsa_base = kvm_vsa_base;
1222 vcpu->arch.__gp = kvm_vmm_gp;
1223 vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
a917f7af
XZ		 1224 vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_BASE(vcpu->vcpu_id);
1225 vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(vcpu->vcpu_id);
b024b793
XZ		 1226 init_ptce_info(vcpu);
1227
1228 r = 0;
1229out:
1230 return r;
1231}
1232
1233static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
1234{
1235 unsigned long psr;
1236 int r;
1237
1238 local_irq_save(psr);
1239 r = kvm_insert_vmm_mapping(vcpu);
1240 if (r)
1241 goto fail;
1242 r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1243 if (r)
1244 goto fail;
1245
1246 r = vti_init_vpd(vcpu);
1247 if (r) {
1248 printk(KERN_DEBUG"kvm: vpd init error!!\n");
1249 goto uninit;
1250 }
1251
1252 r = vti_create_vp(vcpu);
1253 if (r)
1254 goto uninit;
1255
1256 kvm_purge_vmm_mapping(vcpu);
1257 local_irq_restore(psr);
1258
1259 return 0;
1260uninit:
1261 kvm_vcpu_uninit(vcpu);
1262fail:
cab7a1ee 1263 local_irq_restore(psr);
b024b793
XZ		 1264 return r;
1265}
1266
1267struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1268 unsigned int id)
1269{
1270 struct kvm_vcpu *vcpu;
1271 unsigned long vm_base = kvm->arch.vm_base;
1272 int r;
1273 int cpu;
1274
a917f7af
XZ		 1275 BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
1276
1277 r = -EINVAL;
1278 if (id >= KVM_MAX_VCPUS) {
1279 printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
1280 KVM_MAX_VCPUS);
1281 goto fail;
1282 }
1283
b024b793
XZ		 1284 r = -ENOMEM;
1285 if (!vm_base) {
1286 printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1287 goto fail;
1288 }
a917f7af
XZ		 1289 vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
1290 vcpu_data[id].vcpu_struct));
b024b793
XZ		 1291 vcpu->kvm = kvm;
1292
1293 cpu = get_cpu();
1294 vti_vcpu_load(vcpu, cpu);
1295 r = vti_vcpu_setup(vcpu, id);
1296 put_cpu();
1297
1298 if (r) {
1299 printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1300 goto fail;
1301 }
1302
934d534f
JS		 1303 kvm->arch.online_vcpus++;
1304
b024b793
XZ		 1305 return vcpu;
1306fail:
1307 return ERR_PTR(r);
1308}
1309
1310int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1311{
1312 return 0;
1313}
1314
1315int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1316{
1317 return -EINVAL;
1318}
1319
1320int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1321{
1322 return -EINVAL;
1323}
1324
d0bfb940
JK		 1325int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1326 struct kvm_guest_debug *dbg)
b024b793
XZ		 1327{
1328 return -EINVAL;
1329}
1330
1331static void free_kvm(struct kvm *kvm)
1332{
1333 unsigned long vm_base = kvm->arch.vm_base;
1334
1335 if (vm_base) {
1336 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1337 free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1338 }
1339
1340}
1341
1342static void kvm_release_vm_pages(struct kvm *kvm)
1343{
1344 struct kvm_memory_slot *memslot;
1345 int i, j;
1346 unsigned long base_gfn;
1347
1348 for (i = 0; i < kvm->nmemslots; i++) {
1349 memslot = &kvm->memslots[i];
1350 base_gfn = memslot->base_gfn;
1351
1352 for (j = 0; j < memslot->npages; j++) {
1353 if (memslot->rmap[j])
1354 put_page((struct page *)memslot->rmap[j]);
1355 }
1356 }
1357}
1358
ad8ba2cd
SY		 1359void kvm_arch_sync_events(struct kvm *kvm)
1360{
1361}
1362
b024b793
XZ		 1363void kvm_arch_destroy_vm(struct kvm *kvm)
1364{
2381ad24
XZ		 1365 kvm_iommu_unmap_guest(kvm);
1366#ifdef KVM_CAP_DEVICE_ASSIGNMENT
1367 kvm_free_all_assigned_devices(kvm);
1368#endif
b024b793
XZ		 1369 kfree(kvm->arch.vioapic);
1370 kvm_release_vm_pages(kvm);
1371 kvm_free_physmem(kvm);
1372 free_kvm(kvm);
1373}
1374
1375void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1376{
1377}
1378
1379void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1380{
1381 if (cpu != vcpu->cpu) {
1382 vcpu->cpu = cpu;
1383 if (vcpu->arch.ht_active)
1384 kvm_migrate_hlt_timer(vcpu);
1385 }
1386}
1387
1388#define SAVE_REGS(_x) regs->_x = vcpu->arch._x
1389
1390int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1391{
b024b793 1392 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
042b26ed
JS		 1393 int i;
1394
b024b793
XZ		 1395 vcpu_load(vcpu);
1396
1397 for (i = 0; i < 16; i++) {
1398 regs->vpd.vgr[i] = vpd->vgr[i];
1399 regs->vpd.vbgr[i] = vpd->vbgr[i];
1400 }
1401 for (i = 0; i < 128; i++)
1402 regs->vpd.vcr[i] = vpd->vcr[i];
1403 regs->vpd.vhpi = vpd->vhpi;
1404 regs->vpd.vnat = vpd->vnat;
1405 regs->vpd.vbnat = vpd->vbnat;
1406 regs->vpd.vpsr = vpd->vpsr;
1407 regs->vpd.vpr = vpd->vpr;
1408
042b26ed
JS		 1409 memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
1410
b024b793
XZ		 1411 SAVE_REGS(mp_state);
1412 SAVE_REGS(vmm_rr);
1413 memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1414 memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1415 SAVE_REGS(itr_regions);
1416 SAVE_REGS(dtr_regions);
1417 SAVE_REGS(tc_regions);
1418 SAVE_REGS(irq_check);
1419 SAVE_REGS(itc_check);
1420 SAVE_REGS(timer_check);
1421 SAVE_REGS(timer_pending);
1422 SAVE_REGS(last_itc);
1423 for (i = 0; i < 8; i++) {
1424 regs->vrr[i] = vcpu->arch.vrr[i];
1425 regs->ibr[i] = vcpu->arch.ibr[i];
1426 regs->dbr[i] = vcpu->arch.dbr[i];
1427 }
1428 for (i = 0; i < 4; i++)
1429 regs->insvc[i] = vcpu->arch.insvc[i];
1430 regs->saved_itc = vcpu->arch.itc_offset + ia64_getreg(_IA64_REG_AR_ITC);
1431 SAVE_REGS(xtp);
1432 SAVE_REGS(metaphysical_rr0);
1433 SAVE_REGS(metaphysical_rr4);
1434 SAVE_REGS(metaphysical_saved_rr0);
1435 SAVE_REGS(metaphysical_saved_rr4);
1436 SAVE_REGS(fp_psr);
1437 SAVE_REGS(saved_gp);
042b26ed 1438
b024b793 1439 vcpu_put(vcpu);
042b26ed 1440 return 0;
b024b793
XZ		 1441}
1442
e9a999fe
JS		 1443int kvm_arch_vcpu_ioctl_get_stack(struct kvm_vcpu *vcpu,
1444 struct kvm_ia64_vcpu_stack *stack)
1445{
1446 memcpy(stack, vcpu, sizeof(struct kvm_ia64_vcpu_stack));
1447 return 0;
1448}
1449
1450int kvm_arch_vcpu_ioctl_set_stack(struct kvm_vcpu *vcpu,
1451 struct kvm_ia64_vcpu_stack *stack)
1452{
1453 memcpy(vcpu + 1, &stack->stack[0] + sizeof(struct kvm_vcpu),
1454 sizeof(struct kvm_ia64_vcpu_stack) - sizeof(struct kvm_vcpu));
1455
1456 vcpu->arch.exit_data = ((struct kvm_vcpu *)stack)->arch.exit_data;
1457 return 0;
1458}
1459
b024b793
XZ		 1460void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1461{
1462
1463 hrtimer_cancel(&vcpu->arch.hlt_timer);
1464 kfree(vcpu->arch.apic);
1465}
1466
1467
1468long kvm_arch_vcpu_ioctl(struct file *filp,
e9a999fe 1469 unsigned int ioctl, unsigned long arg)
b024b793 1470{
e9a999fe
JS		 1471 struct kvm_vcpu *vcpu = filp->private_data;
1472 void __user *argp = (void __user *)arg;
1473 struct kvm_ia64_vcpu_stack *stack = NULL;
1474 long r;
1475
1476 switch (ioctl) {
1477 case KVM_IA64_VCPU_GET_STACK: {
1478 struct kvm_ia64_vcpu_stack __user *user_stack;
1479 void __user *first_p = argp;
1480
1481 r = -EFAULT;
1482 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1483 goto out;
1484
1485 if (!access_ok(VERIFY_WRITE, user_stack,
1486 sizeof(struct kvm_ia64_vcpu_stack))) {
1487 printk(KERN_INFO "KVM_IA64_VCPU_GET_STACK: "
1488 "Illegal user destination address for stack\n");
1489 goto out;
1490 }
1491 stack = kzalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1492 if (!stack) {
1493 r = -ENOMEM;
1494 goto out;
1495 }
1496
1497 r = kvm_arch_vcpu_ioctl_get_stack(vcpu, stack);
1498 if (r)
1499 goto out;
1500
1501 if (copy_to_user(user_stack, stack,
1502 sizeof(struct kvm_ia64_vcpu_stack)))
1503 goto out;
1504
1505 break;
1506 }
1507 case KVM_IA64_VCPU_SET_STACK: {
1508 struct kvm_ia64_vcpu_stack __user *user_stack;
1509 void __user *first_p = argp;
1510
1511 r = -EFAULT;
1512 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1513 goto out;
1514
1515 if (!access_ok(VERIFY_READ, user_stack,
1516 sizeof(struct kvm_ia64_vcpu_stack))) {
1517 printk(KERN_INFO "KVM_IA64_VCPU_SET_STACK: "
1518 "Illegal user address for stack\n");
1519 goto out;
1520 }
1521 stack = kmalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1522 if (!stack) {
1523 r = -ENOMEM;
1524 goto out;
1525 }
1526 if (copy_from_user(stack, user_stack,
1527 sizeof(struct kvm_ia64_vcpu_stack)))
1528 goto out;
1529
1530 r = kvm_arch_vcpu_ioctl_set_stack(vcpu, stack);
1531 break;
1532 }
1533
1534 default:
1535 r = -EINVAL;
1536 }
1537
1538out:
1539 kfree(stack);
1540 return r;
b024b793
XZ		 1541}
1542
1543int kvm_arch_set_memory_region(struct kvm *kvm,
1544 struct kvm_userspace_memory_region *mem,
1545 struct kvm_memory_slot old,
1546 int user_alloc)
1547{
1548 unsigned long i;
1cbea809 1549 unsigned long pfn;
b024b793
XZ		 1550 int npages = mem->memory_size >> PAGE_SHIFT;
1551 struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
1552 unsigned long base_gfn = memslot->base_gfn;
1553
a917f7af
XZ		 1554 if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
1555 return -ENOMEM;
1556
b024b793 1557 for (i = 0; i < npages; i++) {
1cbea809
XZ		 1558 pfn = gfn_to_pfn(kvm, base_gfn + i);
1559 if (!kvm_is_mmio_pfn(pfn)) {
1560 kvm_set_pmt_entry(kvm, base_gfn + i,
1561 pfn << PAGE_SHIFT,
b010eb51 1562 _PAGE_AR_RWX | _PAGE_MA_WB);
1cbea809
XZ		 1563 memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1564 } else {
1565 kvm_set_pmt_entry(kvm, base_gfn + i,
b010eb51 1566 GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1cbea809
XZ		 1567 _PAGE_MA_UC);
1568 memslot->rmap[i] = 0;
1569 }
b024b793
XZ		 1570 }
1571
1572 return 0;
1573}
1574
34d4cb8f
MT		 1575void kvm_arch_flush_shadow(struct kvm *kvm)
1576{
1577}
b024b793
XZ		 1578
1579long kvm_arch_dev_ioctl(struct file *filp,
e9a999fe 1580 unsigned int ioctl, unsigned long arg)
b024b793
XZ		 1581{
1582 return -EINVAL;
1583}
1584
1585void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1586{
1587 kvm_vcpu_uninit(vcpu);
1588}
1589
1590static int vti_cpu_has_kvm_support(void)
1591{
1592 long avail = 1, status = 1, control = 1;
1593 long ret;
1594
1595 ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1596 if (ret)
1597 goto out;
1598
1599 if (!(avail & PAL_PROC_VM_BIT))
1600 goto out;
1601
1602 printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1603
1604 ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1605 if (ret)
1606 goto out;
1607 printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1608
1609 if (!(vp_env_info & VP_OPCODE)) {
1610 printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1611 "vm_env_info:0x%lx\n", vp_env_info);
1612 }
1613
1614 return 1;
1615out:
1616 return 0;
1617}
1618
1619static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1620 struct module *module)
1621{
1622 unsigned long module_base;
1623 unsigned long vmm_size;
1624
1625 unsigned long vmm_offset, func_offset, fdesc_offset;
1626 struct fdesc *p_fdesc;
1627
1628 BUG_ON(!module);
1629
1630 if (!kvm_vmm_base) {
1631 printk("kvm: kvm area hasn't been initilized yet!!\n");
1632 return -EFAULT;
1633 }
1634
1635 /*Calculate new position of relocated vmm module.*/
1636 module_base = (unsigned long)module->module_core;
1637 vmm_size = module->core_size;
1638 if (unlikely(vmm_size > KVM_VMM_SIZE))
1639 return -EFAULT;
1640
1641 memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1642 kvm_flush_icache(kvm_vmm_base, vmm_size);
1643
1644 /*Recalculate kvm_vmm_info based on new VMM*/
1645 vmm_offset = vmm_info->vmm_ivt - module_base;
1646 kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1647 printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1648 kvm_vmm_info->vmm_ivt);
1649
1650 fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1651 kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1652 fdesc_offset);
1653 func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1654 p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1655 p_fdesc->ip = KVM_VMM_BASE + func_offset;
1656 p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1657
1658 printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1659 KVM_VMM_BASE+func_offset);
1660
1661 fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1662 kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1663 fdesc_offset);
1664 func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1665 p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1666 p_fdesc->ip = KVM_VMM_BASE + func_offset;
1667 p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1668
1669 kvm_vmm_gp = p_fdesc->gp;
1670
1671 printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1672 kvm_vmm_info->vmm_entry);
1673 printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1674 KVM_VMM_BASE + func_offset);
1675
1676 return 0;
1677}
1678
1679int kvm_arch_init(void *opaque)
1680{
1681 int r;
1682 struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1683
1684 if (!vti_cpu_has_kvm_support()) {
1685 printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1686 r = -EOPNOTSUPP;
1687 goto out;
1688 }
1689
1690 if (kvm_vmm_info) {
1691 printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1692 r = -EEXIST;
1693 goto out;
1694 }
1695
1696 r = -ENOMEM;
1697 kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1698 if (!kvm_vmm_info)
1699 goto out;
1700
1701 if (kvm_alloc_vmm_area())
1702 goto out_free0;
1703
1704 r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1705 if (r)
1706 goto out_free1;
1707
1708 return 0;
1709
1710out_free1:
1711 kvm_free_vmm_area();
1712out_free0:
1713 kfree(kvm_vmm_info);
1714out:
1715 return r;
1716}
1717
1718void kvm_arch_exit(void)
1719{
1720 kvm_free_vmm_area();
1721 kfree(kvm_vmm_info);
1722 kvm_vmm_info = NULL;
1723}
1724
1725static int kvm_ia64_sync_dirty_log(struct kvm *kvm,
1726 struct kvm_dirty_log *log)
1727{
1728 struct kvm_memory_slot *memslot;
1729 int r, i;
1730 long n, base;
a917f7af
XZ		 1731 unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
1732 offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
b024b793
XZ		 1733
1734 r = -EINVAL;
1735 if (log->slot >= KVM_MEMORY_SLOTS)
1736 goto out;
1737
1738 memslot = &kvm->memslots[log->slot];
1739 r = -ENOENT;
1740 if (!memslot->dirty_bitmap)
1741 goto out;
1742
1743 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1744 base = memslot->base_gfn / BITS_PER_LONG;
1745
1746 for (i = 0; i < n/sizeof(long); ++i) {
1747 memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1748 dirty_bitmap[base + i] = 0;
1749 }
1750 r = 0;
1751out:
1752 return r;
1753}
1754
1755int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1756 struct kvm_dirty_log *log)
1757{
1758 int r;
1759 int n;
1760 struct kvm_memory_slot *memslot;
1761 int is_dirty = 0;
1762
1763 spin_lock(&kvm->arch.dirty_log_lock);
1764
1765 r = kvm_ia64_sync_dirty_log(kvm, log);
1766 if (r)
1767 goto out;
1768
1769 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1770 if (r)
1771 goto out;
1772
1773 /* If nothing is dirty, don't bother messing with page tables. */
1774 if (is_dirty) {
1775 kvm_flush_remote_tlbs(kvm);
1776 memslot = &kvm->memslots[log->slot];
1777 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1778 memset(memslot->dirty_bitmap, 0, n);
1779 }
1780 r = 0;
1781out:
1782 spin_unlock(&kvm->arch.dirty_log_lock);
1783 return r;
1784}
1785
1786int kvm_arch_hardware_setup(void)
1787{
1788 return 0;
1789}
1790
1791void kvm_arch_hardware_unsetup(void)
1792{
1793}
1794
1795static void vcpu_kick_intr(void *info)
1796{
1797#ifdef DEBUG
1798 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
1799 printk(KERN_DEBUG"vcpu_kick_intr %p \n", vcpu);
1800#endif
1801}
1802
1803void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
1804{
1805 int ipi_pcpu = vcpu->cpu;
decc9016 1806 int cpu = get_cpu();
b024b793
XZ		 1807
1808 if (waitqueue_active(&vcpu->wq))
1809 wake_up_interruptible(&vcpu->wq);
1810
decc9016 1811 if (vcpu->guest_mode && cpu != ipi_pcpu)
2f73ccab 1812 smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0);
decc9016 1813 put_cpu();
b024b793
XZ		 1814}
1815
6da7e3f6 1816int kvm_apic_set_irq(struct kvm_vcpu *vcpu, u8 vec, u8 dmode, u8 trig)
b024b793
XZ		 1817{
1818
1819 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1820
1821 if (!test_and_set_bit(vec, &vpd->irr[0])) {
1822 vcpu->arch.irq_new_pending = 1;
decc9016 1823 kvm_vcpu_kick(vcpu);
b024b793
XZ		 1824 return 1;
1825 }
1826 return 0;
1827}
1828
1829int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1830{
1831 return apic->vcpu->vcpu_id == dest;
1832}
1833
1834int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1835{
1836 return 0;
1837}
1838
e1035715 1839int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
b024b793 1840{
e1035715 1841 return vcpu1->arch.xtp - vcpu2->arch.xtp;
b024b793
XZ		 1842}
1843
343f94fe
GN		 1844int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
1845 int short_hand, int dest, int dest_mode)
1846{
1847 return (dest_mode == 0) ?
1848 kvm_apic_match_physical_addr(target, dest) :
1849 kvm_apic_match_logical_addr(target, dest);
1850}
1851
b024b793
XZ		 1852static int find_highest_bits(int *dat)
1853{
1854 u32 bits, bitnum;
1855 int i;
1856
1857 /* loop for all 256 bits */
1858 for (i = 7; i >= 0 ; i--) {
1859 bits = dat[i];
1860 if (bits) {
1861 bitnum = fls(bits);
1862 return i * 32 + bitnum - 1;
1863 }
1864 }
1865
1866 return -1;
1867}
1868
1869int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1870{
1871 struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1872
1873 if (vpd->irr[0] & (1UL << NMI_VECTOR))
1874 return NMI_VECTOR;
1875 if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1876 return ExtINT_VECTOR;
1877
1878 return find_highest_bits((int *)&vpd->irr[0]);
1879}
1880
1881int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
1882{
1883 if (kvm_highest_pending_irq(vcpu) != -1)
1884 return 1;
1885 return 0;
1886}
1887
3d80840d
MT		 1888int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1889{
decc9016 1890 return vcpu->arch.timer_fired;
3d80840d
MT		 1891}
1892
b024b793
XZ		 1893gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
1894{
1895 return gfn;
1896}
1897
1898int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1899{
a4535290 1900 return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE;
b024b793 1901}
62d9f0db
MT		 1902
1903int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1904 struct kvm_mp_state *mp_state)
1905{
8c4b537d
XZ		 1906 vcpu_load(vcpu);
1907 mp_state->mp_state = vcpu->arch.mp_state;
1908 vcpu_put(vcpu);
1909 return 0;
1910}
1911
1912static int vcpu_reset(struct kvm_vcpu *vcpu)
1913{
1914 int r;
1915 long psr;
1916 local_irq_save(psr);
1917 r = kvm_insert_vmm_mapping(vcpu);
1918 if (r)
1919 goto fail;
1920
1921 vcpu->arch.launched = 0;
1922 kvm_arch_vcpu_uninit(vcpu);
1923 r = kvm_arch_vcpu_init(vcpu);
1924 if (r)
1925 goto fail;
1926
1927 kvm_purge_vmm_mapping(vcpu);
1928 r = 0;
1929fail:
1930 local_irq_restore(psr);
1931 return r;
62d9f0db
MT		 1932}
1933
1934int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1935 struct kvm_mp_state *mp_state)
1936{
8c4b537d
XZ		 1937 int r = 0;
1938
1939 vcpu_load(vcpu);
1940 vcpu->arch.mp_state = mp_state->mp_state;
1941 if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
1942 r = vcpu_reset(vcpu);
1943 vcpu_put(vcpu);
1944 return r;
62d9f0db 1945}
Linux kernel - Deliverables
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