arch/ia64/kvm/kvm-ia64.c

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