arch/ia64/kvm/kvm-ia64.c

   1 /*
   2  * kvm_ia64.c: Basic KVM support On Itanium series processors
   3  *
   4  *
   5  *      Copyright (C) 2007, Intel Corporation.
   6  *      Xiantao Zhang  (xiantao.zhang@intel.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms and conditions of the GNU General Public License,
  10  * version 2, as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  19  * Place - Suite 330, Boston, MA 02111-1307 USA.
  20  *
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/errno.h>
  25 #include <linux/percpu.h>
  26 #include <linux/fs.h>
  27 #include <linux/slab.h>
  28 #include <linux/smp.h>
  29 #include <linux/kvm_host.h>
  30 #include <linux/kvm.h>
  31 #include <linux/bitops.h>
  32 #include <linux/hrtimer.h>
  33 #include <linux/uaccess.h>
  34 #include <linux/iommu.h>
  35 #include <linux/intel-iommu.h>
  36 #include <linux/pci.h>
  37
  38 #include <asm/pgtable.h>
  39 #include <asm/gcc_intrin.h>
  40 #include <asm/pal.h>
  41 #include <asm/cacheflush.h>
  42 #include <asm/div64.h>
  43 #include <asm/tlb.h>
  44 #include <asm/elf.h>
  45 #include <asm/sn/addrs.h>
  46 #include <asm/sn/clksupport.h>
  47 #include <asm/sn/shub_mmr.h>
  48
  49 #include "misc.h"
  50 #include "vti.h"
  51 #include "iodev.h"
  52 #include "ioapic.h"
  53 #include "lapic.h"
  54 #include "irq.h"
  55
  56 static unsigned long kvm_vmm_base;
  57 static unsigned long kvm_vsa_base;
  58 static unsigned long kvm_vm_buffer;
  59 static unsigned long kvm_vm_buffer_size;
  60 unsigned long kvm_vmm_gp;
  61
  62 static long vp_env_info;
  63
  64 static struct kvm_vmm_info *kvm_vmm_info;
  65
  66 static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu);
  67
  68 struct kvm_stats_debugfs_item debugfs_entries[] = {
  69         { NULL }
  70 };
  71
  72 static unsigned long kvm_get_itc(struct kvm_vcpu *vcpu)
  73 {
  74 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
  75         if (vcpu->kvm->arch.is_sn2)
  76                 return rtc_time();
  77         else
  78 #endif
  79                 return ia64_getreg(_IA64_REG_AR_ITC);
  80 }
  81
  82 static void kvm_flush_icache(unsigned long start, unsigned long len)
  83 {
  84         int l;
  85
  86         for (l = 0; l < (len + 32); l += 32)
  87                 ia64_fc((void *)(start + l));
  88
  89         ia64_sync_i();
  90         ia64_srlz_i();
  91 }
  92
  93 static void kvm_flush_tlb_all(void)
  94 {
  95         unsigned long i, j, count0, count1, stride0, stride1, addr;
  96         long flags;
  97
  98         addr    = local_cpu_data->ptce_base;
  99         count0  = local_cpu_data->ptce_count[0];
 100         count1  = local_cpu_data->ptce_count[1];
 101         stride0 = local_cpu_data->ptce_stride[0];
 102         stride1 = local_cpu_data->ptce_stride[1];
 103
 104         local_irq_save(flags);
 105         for (i = 0; i < count0; ++i) {
 106                 for (j = 0; j < count1; ++j) {
 107                         ia64_ptce(addr);
 108                         addr += stride1;
 109                 }
 110                 addr += stride0;
 111         }
 112         local_irq_restore(flags);
 113         ia64_srlz_i();                  /* srlz.i implies srlz.d */
 114 }
 115
 116 long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler)
 117 {
 118         struct ia64_pal_retval iprv;
 119
 120         PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva,
 121                         (u64)opt_handler);
 122
 123         return iprv.status;
 124 }
 125
 126 static  DEFINE_SPINLOCK(vp_lock);
 127
 128 int kvm_arch_hardware_enable(void *garbage)
 129 {
 130         long  status;
 131         long  tmp_base;
 132         unsigned long pte;
 133         unsigned long saved_psr;
 134         int slot;
 135
 136         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
 137         local_irq_save(saved_psr);
 138         slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 139         local_irq_restore(saved_psr);
 140         if (slot < 0)
 141                 return -EINVAL;
 142
 143         spin_lock(&vp_lock);
 144         status = ia64_pal_vp_init_env(kvm_vsa_base ?
 145                                 VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
 146                         __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
 147         if (status != 0) {
 148                 spin_unlock(&vp_lock);
 149                 printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
 150                 return -EINVAL;
 151         }
 152
 153         if (!kvm_vsa_base) {
 154                 kvm_vsa_base = tmp_base;
 155                 printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
 156         }
 157         spin_unlock(&vp_lock);
 158         ia64_ptr_entry(0x3, slot);
 159
 160         return 0;
 161 }
 162
 163 void kvm_arch_hardware_disable(void *garbage)
 164 {
 165
 166         long status;
 167         int slot;
 168         unsigned long pte;
 169         unsigned long saved_psr;
 170         unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
 171
 172         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
 173                                 PAGE_KERNEL));
 174
 175         local_irq_save(saved_psr);
 176         slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 177         local_irq_restore(saved_psr);
 178         if (slot < 0)
 179                 return;
 180
 181         status = ia64_pal_vp_exit_env(host_iva);
 182         if (status)
 183                 printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
 184                                 status);
 185         ia64_ptr_entry(0x3, slot);
 186 }
 187
 188 void kvm_arch_check_processor_compat(void *rtn)
 189 {
 190         *(int *)rtn = 0;
 191 }
 192
 193 int kvm_dev_ioctl_check_extension(long ext)
 194 {
 195
 196         int r;
 197
 198         switch (ext) {
 199         case KVM_CAP_IRQCHIP:
 200         case KVM_CAP_MP_STATE:
 201         case KVM_CAP_IRQ_INJECT_STATUS:
 202                 r = 1;
 203                 break;
 204         case KVM_CAP_COALESCED_MMIO:
 205                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 206                 break;
 207 #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT
 208         case KVM_CAP_IOMMU:
 209                 r = iommu_present(&pci_bus_type);
 210                 break;
 211 #endif
 212         default:
 213                 r = 0;
 214         }
 215         return r;
 216
 217 }
 218
 219 static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 220 {
 221         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 222         kvm_run->hw.hardware_exit_reason = 1;
 223         return 0;
 224 }
 225
 226 static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 227 {
 228         struct kvm_mmio_req *p;
 229         struct kvm_io_device *mmio_dev;
 230         int r;
 231
 232         p = kvm_get_vcpu_ioreq(vcpu);
 233
 234         if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS)
 235                 goto mmio;
 236         vcpu->mmio_needed = 1;
 237         vcpu->mmio_fragments[0].gpa = kvm_run->mmio.phys_addr = p->addr;
 238         vcpu->mmio_fragments[0].len = kvm_run->mmio.len = p->size;
 239         vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir;
 240
 241         if (vcpu->mmio_is_write)
 242                 memcpy(vcpu->arch.mmio_data, &p->data, p->size);
 243         memcpy(kvm_run->mmio.data, &p->data, p->size);
 244         kvm_run->exit_reason = KVM_EXIT_MMIO;
 245         return 0;
 246 mmio:
 247         if (p->dir)
 248                 r = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, p->addr,
 249                                     p->size, &p->data);
 250         else
 251                 r = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, p->addr,
 252                                      p->size, &p->data);
 253         if (r)
 254                 printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr);
 255         p->state = STATE_IORESP_READY;
 256
 257         return 1;
 258 }
 259
 260 static int handle_pal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 261 {
 262         struct exit_ctl_data *p;
 263
 264         p = kvm_get_exit_data(vcpu);
 265
 266         if (p->exit_reason == EXIT_REASON_PAL_CALL)
 267                 return kvm_pal_emul(vcpu, kvm_run);
 268         else {
 269                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 270                 kvm_run->hw.hardware_exit_reason = 2;
 271                 return 0;
 272         }
 273 }
 274
 275 static int handle_sal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 276 {
 277         struct exit_ctl_data *p;
 278
 279         p = kvm_get_exit_data(vcpu);
 280
 281         if (p->exit_reason == EXIT_REASON_SAL_CALL) {
 282                 kvm_sal_emul(vcpu);
 283                 return 1;
 284         } else {
 285                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 286                 kvm_run->hw.hardware_exit_reason = 3;
 287                 return 0;
 288         }
 289
 290 }
 291
 292 static int __apic_accept_irq(struct kvm_vcpu *vcpu, uint64_t vector)
 293 {
 294         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 295
 296         if (!test_and_set_bit(vector, &vpd->irr[0])) {
 297                 vcpu->arch.irq_new_pending = 1;
 298                 kvm_vcpu_kick(vcpu);
 299                 return 1;
 300         }
 301         return 0;
 302 }
 303
 304 /*
 305  *  offset: address offset to IPI space.
 306  *  value:  deliver value.
 307  */
 308 static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm,
 309                                 uint64_t vector)
 310 {
 311         switch (dm) {
 312         case SAPIC_FIXED:
 313                 break;
 314         case SAPIC_NMI:
 315                 vector = 2;
 316                 break;
 317         case SAPIC_EXTINT:
 318                 vector = 0;
 319                 break;
 320         case SAPIC_INIT:
 321         case SAPIC_PMI:
 322         default:
 323                 printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n");
 324                 return;
 325         }
 326         __apic_accept_irq(vcpu, vector);
 327 }
 328
 329 static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id,
 330                         unsigned long eid)
 331 {
 332         union ia64_lid lid;
 333         int i;
 334         struct kvm_vcpu *vcpu;
 335
 336         kvm_for_each_vcpu(i, vcpu, kvm) {
 337                 lid.val = VCPU_LID(vcpu);
 338                 if (lid.id == id && lid.eid == eid)
 339                         return vcpu;
 340         }
 341
 342         return NULL;
 343 }
 344
 345 static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 346 {
 347         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 348         struct kvm_vcpu *target_vcpu;
 349         struct kvm_pt_regs *regs;
 350         union ia64_ipi_a addr = p->u.ipi_data.addr;
 351         union ia64_ipi_d data = p->u.ipi_data.data;
 352
 353         target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid);
 354         if (!target_vcpu)
 355                 return handle_vm_error(vcpu, kvm_run);
 356
 357         if (!target_vcpu->arch.launched) {
 358                 regs = vcpu_regs(target_vcpu);
 359
 360                 regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip;
 361                 regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp;
 362
 363                 target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 364                 if (waitqueue_active(&target_vcpu->wq))
 365                         wake_up_interruptible(&target_vcpu->wq);
 366         } else {
 367                 vcpu_deliver_ipi(target_vcpu, data.dm, data.vector);
 368                 if (target_vcpu != vcpu)
 369                         kvm_vcpu_kick(target_vcpu);
 370         }
 371
 372         return 1;
 373 }
 374
 375 struct call_data {
 376         struct kvm_ptc_g ptc_g_data;
 377         struct kvm_vcpu *vcpu;
 378 };
 379
 380 static void vcpu_global_purge(void *info)
 381 {
 382         struct call_data *p = (struct call_data *)info;
 383         struct kvm_vcpu *vcpu = p->vcpu;
 384
 385         if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
 386                 return;
 387
 388         set_bit(KVM_REQ_PTC_G, &vcpu->requests);
 389         if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) {
 390                 vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] =
 391                                                         p->ptc_g_data;
 392         } else {
 393                 clear_bit(KVM_REQ_PTC_G, &vcpu->requests);
 394                 vcpu->arch.ptc_g_count = 0;
 395                 set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
 396         }
 397 }
 398
 399 static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 400 {
 401         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 402         struct kvm *kvm = vcpu->kvm;
 403         struct call_data call_data;
 404         int i;
 405         struct kvm_vcpu *vcpui;
 406
 407         call_data.ptc_g_data = p->u.ptc_g_data;
 408
 409         kvm_for_each_vcpu(i, vcpui, kvm) {
 410                 if (vcpui->arch.mp_state == KVM_MP_STATE_UNINITIALIZED ||
 411                                 vcpu == vcpui)
 412                         continue;
 413
 414                 if (waitqueue_active(&vcpui->wq))
 415                         wake_up_interruptible(&vcpui->wq);
 416
 417                 if (vcpui->cpu != -1) {
 418                         call_data.vcpu = vcpui;
 419                         smp_call_function_single(vcpui->cpu,
 420                                         vcpu_global_purge, &call_data, 1);
 421                 } else
 422                         printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
 423
 424         }
 425         return 1;
 426 }
 427
 428 static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 429 {
 430         return 1;
 431 }
 432
 433 static int kvm_sn2_setup_mappings(struct kvm_vcpu *vcpu)
 434 {
 435         unsigned long pte, rtc_phys_addr, map_addr;
 436         int slot;
 437
 438         map_addr = KVM_VMM_BASE + (1UL << KVM_VMM_SHIFT);
 439         rtc_phys_addr = LOCAL_MMR_OFFSET | SH_RTC;
 440         pte = pte_val(mk_pte_phys(rtc_phys_addr, PAGE_KERNEL_UC));
 441         slot = ia64_itr_entry(0x3, map_addr, pte, PAGE_SHIFT);
 442         vcpu->arch.sn_rtc_tr_slot = slot;
 443         if (slot < 0) {
 444                 printk(KERN_ERR "Mayday mayday! RTC mapping failed!\n");
 445                 slot = 0;
 446         }
 447         return slot;
 448 }
 449
 450 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
 451 {
 452
 453         ktime_t kt;
 454         long itc_diff;
 455         unsigned long vcpu_now_itc;
 456         unsigned long expires;
 457         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
 458         unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
 459         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 460
 461         if (irqchip_in_kernel(vcpu->kvm)) {
 462
 463                 vcpu_now_itc = kvm_get_itc(vcpu) + vcpu->arch.itc_offset;
 464
 465                 if (time_after(vcpu_now_itc, vpd->itm)) {
 466                         vcpu->arch.timer_check = 1;
 467                         return 1;
 468                 }
 469                 itc_diff = vpd->itm - vcpu_now_itc;
 470                 if (itc_diff < 0)
 471                         itc_diff = -itc_diff;
 472
 473                 expires = div64_u64(itc_diff, cyc_per_usec);
 474                 kt = ktime_set(0, 1000 * expires);
 475
 476                 vcpu->arch.ht_active = 1;
 477                 hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
 478
 479                 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
 480                 kvm_vcpu_block(vcpu);
 481                 hrtimer_cancel(p_ht);
 482                 vcpu->arch.ht_active = 0;
 483
 484                 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests) ||
 485                                 kvm_cpu_has_pending_timer(vcpu))
 486                         if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
 487                                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 488
 489                 if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
 490                         return -EINTR;
 491                 return 1;
 492         } else {
 493                 printk(KERN_ERR"kvm: Unsupported userspace halt!");
 494                 return 0;
 495         }
 496 }
 497
 498 static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
 499                 struct kvm_run *kvm_run)
 500 {
 501         kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
 502         return 0;
 503 }
 504
 505 static int handle_external_interrupt(struct kvm_vcpu *vcpu,
 506                 struct kvm_run *kvm_run)
 507 {
 508         return 1;
 509 }
 510
 511 static int handle_vcpu_debug(struct kvm_vcpu *vcpu,
 512                                 struct kvm_run *kvm_run)
 513 {
 514         printk("VMM: %s", vcpu->arch.log_buf);
 515         return 1;
 516 }
 517
 518 static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
 519                 struct kvm_run *kvm_run) = {
 520         [EXIT_REASON_VM_PANIC]              = handle_vm_error,
 521         [EXIT_REASON_MMIO_INSTRUCTION]      = handle_mmio,
 522         [EXIT_REASON_PAL_CALL]              = handle_pal_call,
 523         [EXIT_REASON_SAL_CALL]              = handle_sal_call,
 524         [EXIT_REASON_SWITCH_RR6]            = handle_switch_rr6,
 525         [EXIT_REASON_VM_DESTROY]            = handle_vm_shutdown,
 526         [EXIT_REASON_EXTERNAL_INTERRUPT]    = handle_external_interrupt,
 527         [EXIT_REASON_IPI]                   = handle_ipi,
 528         [EXIT_REASON_PTC_G]                 = handle_global_purge,
 529         [EXIT_REASON_DEBUG]                 = handle_vcpu_debug,
 530
 531 };
 532
 533 static const int kvm_vti_max_exit_handlers =
 534                 sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
 535
 536 static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
 537 {
 538         struct exit_ctl_data *p_exit_data;
 539
 540         p_exit_data = kvm_get_exit_data(vcpu);
 541         return p_exit_data->exit_reason;
 542 }
 543
 544 /*
 545  * The guest has exited.  See if we can fix it or if we need userspace
 546  * assistance.
 547  */
 548 static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 549 {
 550         u32 exit_reason = kvm_get_exit_reason(vcpu);
 551         vcpu->arch.last_exit = exit_reason;
 552
 553         if (exit_reason < kvm_vti_max_exit_handlers
 554                         && kvm_vti_exit_handlers[exit_reason])
 555                 return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
 556         else {
 557                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 558                 kvm_run->hw.hardware_exit_reason = exit_reason;
 559         }
 560         return 0;
 561 }
 562
 563 static inline void vti_set_rr6(unsigned long rr6)
 564 {
 565         ia64_set_rr(RR6, rr6);
 566         ia64_srlz_i();
 567 }
 568
 569 static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
 570 {
 571         unsigned long pte;
 572         struct kvm *kvm = vcpu->kvm;
 573         int r;
 574
 575         /*Insert a pair of tr to map vmm*/
 576         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
 577         r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 578         if (r < 0)
 579                 goto out;
 580         vcpu->arch.vmm_tr_slot = r;
 581         /*Insert a pairt of tr to map data of vm*/
 582         pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
 583         r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
 584                                         pte, KVM_VM_DATA_SHIFT);
 585         if (r < 0)
 586                 goto out;
 587         vcpu->arch.vm_tr_slot = r;
 588
 589 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 590         if (kvm->arch.is_sn2) {
 591                 r = kvm_sn2_setup_mappings(vcpu);
 592                 if (r < 0)
 593                         goto out;
 594         }
 595 #endif
 596
 597         r = 0;
 598 out:
 599         return r;
 600 }
 601
 602 static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
 603 {
 604         struct kvm *kvm = vcpu->kvm;
 605         ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
 606         ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
 607 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 608         if (kvm->arch.is_sn2)
 609                 ia64_ptr_entry(0x3, vcpu->arch.sn_rtc_tr_slot);
 610 #endif
 611 }
 612
 613 static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
 614 {
 615         unsigned long psr;
 616         int r;
 617         int cpu = smp_processor_id();
 618
 619         if (vcpu->arch.last_run_cpu != cpu ||
 620                         per_cpu(last_vcpu, cpu) != vcpu) {
 621                 per_cpu(last_vcpu, cpu) = vcpu;
 622                 vcpu->arch.last_run_cpu = cpu;
 623                 kvm_flush_tlb_all();
 624         }
 625
 626         vcpu->arch.host_rr6 = ia64_get_rr(RR6);
 627         vti_set_rr6(vcpu->arch.vmm_rr);
 628         local_irq_save(psr);
 629         r = kvm_insert_vmm_mapping(vcpu);
 630         local_irq_restore(psr);
 631         return r;
 632 }
 633
 634 static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
 635 {
 636         kvm_purge_vmm_mapping(vcpu);
 637         vti_set_rr6(vcpu->arch.host_rr6);
 638 }
 639
 640 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 641 {
 642         union context *host_ctx, *guest_ctx;
 643         int r, idx;
 644
 645         idx = srcu_read_lock(&vcpu->kvm->srcu);
 646
 647 again:
 648         if (signal_pending(current)) {
 649                 r = -EINTR;
 650                 kvm_run->exit_reason = KVM_EXIT_INTR;
 651                 goto out;
 652         }
 653
 654         preempt_disable();
 655         local_irq_disable();
 656
 657         /*Get host and guest context with guest address space.*/
 658         host_ctx = kvm_get_host_context(vcpu);
 659         guest_ctx = kvm_get_guest_context(vcpu);
 660
 661         clear_bit(KVM_REQ_KICK, &vcpu->requests);
 662
 663         r = kvm_vcpu_pre_transition(vcpu);
 664         if (r < 0)
 665                 goto vcpu_run_fail;
 666
 667         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 668         vcpu->mode = IN_GUEST_MODE;
 669         kvm_guest_enter();
 670
 671         /*
 672          * Transition to the guest
 673          */
 674         kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
 675
 676         kvm_vcpu_post_transition(vcpu);
 677
 678         vcpu->arch.launched = 1;
 679         set_bit(KVM_REQ_KICK, &vcpu->requests);
 680         local_irq_enable();
 681
 682         /*
 683          * We must have an instruction between local_irq_enable() and
 684          * kvm_guest_exit(), so the timer interrupt isn't delayed by
 685          * the interrupt shadow.  The stat.exits increment will do nicely.
 686          * But we need to prevent reordering, hence this barrier():
 687          */
 688         barrier();
 689         kvm_guest_exit();
 690         vcpu->mode = OUTSIDE_GUEST_MODE;
 691         preempt_enable();
 692
 693         idx = srcu_read_lock(&vcpu->kvm->srcu);
 694
 695         r = kvm_handle_exit(kvm_run, vcpu);
 696
 697         if (r > 0) {
 698                 if (!need_resched())
 699                         goto again;
 700         }
 701
 702 out:
 703         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 704         if (r > 0) {
 705                 kvm_resched(vcpu);
 706                 idx = srcu_read_lock(&vcpu->kvm->srcu);
 707                 goto again;
 708         }
 709
 710         return r;
 711
 712 vcpu_run_fail:
 713         local_irq_enable();
 714         preempt_enable();
 715         kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
 716         goto out;
 717 }
 718
 719 static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
 720 {
 721         struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
 722
 723         if (!vcpu->mmio_is_write)
 724                 memcpy(&p->data, vcpu->arch.mmio_data, 8);
 725         p->state = STATE_IORESP_READY;
 726 }
 727
 728 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 729 {
 730         int r;
 731         sigset_t sigsaved;
 732
 733         if (vcpu->sigset_active)
 734                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 735
 736         if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
 737                 kvm_vcpu_block(vcpu);
 738                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 739                 r = -EAGAIN;
 740                 goto out;
 741         }
 742
 743         if (vcpu->mmio_needed) {
 744                 memcpy(vcpu->arch.mmio_data, kvm_run->mmio.data, 8);
 745                 kvm_set_mmio_data(vcpu);
 746                 vcpu->mmio_read_completed = 1;
 747                 vcpu->mmio_needed = 0;
 748         }
 749         r = __vcpu_run(vcpu, kvm_run);
 750 out:
 751         if (vcpu->sigset_active)
 752                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 753
 754         return r;
 755 }
 756
 757 struct kvm *kvm_arch_alloc_vm(void)
 758 {
 759
 760         struct kvm *kvm;
 761         uint64_t  vm_base;
 762
 763         BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
 764
 765         vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
 766
 767         if (!vm_base)
 768                 return NULL;
 769
 770         memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
 771         kvm = (struct kvm *)(vm_base +
 772                         offsetof(struct kvm_vm_data, kvm_vm_struct));
 773         kvm->arch.vm_base = vm_base;
 774         printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
 775
 776         return kvm;
 777 }
 778
 779 struct kvm_ia64_io_range {
 780         unsigned long start;
 781         unsigned long size;
 782         unsigned long type;
 783 };
 784
 785 static const struct kvm_ia64_io_range io_ranges[] = {
 786         {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
 787         {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
 788         {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
 789         {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
 790         {PIB_START, PIB_SIZE, GPFN_PIB},
 791 };
 792
 793 static void kvm_build_io_pmt(struct kvm *kvm)
 794 {
 795         unsigned long i, j;
 796
 797         /* Mark I/O ranges */
 798         for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
 799                                                         i++) {
 800                 for (j = io_ranges[i].start;
 801                                 j < io_ranges[i].start + io_ranges[i].size;
 802                                 j += PAGE_SIZE)
 803                         kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
 804                                         io_ranges[i].type, 0);
 805         }
 806
 807 }
 808
 809 /*Use unused rids to virtualize guest rid.*/
 810 #define GUEST_PHYSICAL_RR0      0x1739
 811 #define GUEST_PHYSICAL_RR4      0x2739
 812 #define VMM_INIT_RR             0x1660
 813
 814 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 815 {
 816         BUG_ON(!kvm);
 817
 818         if (type)
 819                 return -EINVAL;
 820
 821         kvm->arch.is_sn2 = ia64_platform_is("sn2");
 822
 823         kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
 824         kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
 825         kvm->arch.vmm_init_rr = VMM_INIT_RR;
 826
 827         /*
 828          *Fill P2M entries for MMIO/IO ranges
 829          */
 830         kvm_build_io_pmt(kvm);
 831
 832         INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
 833
 834         /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
 835         set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
 836
 837         return 0;
 838 }
 839
 840 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
 841                                         struct kvm_irqchip *chip)
 842 {
 843         int r;
 844
 845         r = 0;
 846         switch (chip->chip_id) {
 847         case KVM_IRQCHIP_IOAPIC:
 848                 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
 849                 break;
 850         default:
 851                 r = -EINVAL;
 852                 break;
 853         }
 854         return r;
 855 }
 856
 857 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
 858 {
 859         int r;
 860
 861         r = 0;
 862         switch (chip->chip_id) {
 863         case KVM_IRQCHIP_IOAPIC:
 864                 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
 865                 break;
 866         default:
 867                 r = -EINVAL;
 868                 break;
 869         }
 870         return r;
 871 }
 872
 873 #define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
 874
 875 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 876 {
 877         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 878         int i;
 879
 880         for (i = 0; i < 16; i++) {
 881                 vpd->vgr[i] = regs->vpd.vgr[i];
 882                 vpd->vbgr[i] = regs->vpd.vbgr[i];
 883         }
 884         for (i = 0; i < 128; i++)
 885                 vpd->vcr[i] = regs->vpd.vcr[i];
 886         vpd->vhpi = regs->vpd.vhpi;
 887         vpd->vnat = regs->vpd.vnat;
 888         vpd->vbnat = regs->vpd.vbnat;
 889         vpd->vpsr = regs->vpd.vpsr;
 890
 891         vpd->vpr = regs->vpd.vpr;
 892
 893         memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
 894
 895         RESTORE_REGS(mp_state);
 896         RESTORE_REGS(vmm_rr);
 897         memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
 898         memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
 899         RESTORE_REGS(itr_regions);
 900         RESTORE_REGS(dtr_regions);
 901         RESTORE_REGS(tc_regions);
 902         RESTORE_REGS(irq_check);
 903         RESTORE_REGS(itc_check);
 904         RESTORE_REGS(timer_check);
 905         RESTORE_REGS(timer_pending);
 906         RESTORE_REGS(last_itc);
 907         for (i = 0; i < 8; i++) {
 908                 vcpu->arch.vrr[i] = regs->vrr[i];
 909                 vcpu->arch.ibr[i] = regs->ibr[i];
 910                 vcpu->arch.dbr[i] = regs->dbr[i];
 911         }
 912         for (i = 0; i < 4; i++)
 913                 vcpu->arch.insvc[i] = regs->insvc[i];
 914         RESTORE_REGS(xtp);
 915         RESTORE_REGS(metaphysical_rr0);
 916         RESTORE_REGS(metaphysical_rr4);
 917         RESTORE_REGS(metaphysical_saved_rr0);
 918         RESTORE_REGS(metaphysical_saved_rr4);
 919         RESTORE_REGS(fp_psr);
 920         RESTORE_REGS(saved_gp);
 921
 922         vcpu->arch.irq_new_pending = 1;
 923         vcpu->arch.itc_offset = regs->saved_itc - kvm_get_itc(vcpu);
 924         set_bit(KVM_REQ_RESUME, &vcpu->requests);
 925
 926         return 0;
 927 }
 928
 929 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
 930                 bool line_status)
 931 {
 932         if (!irqchip_in_kernel(kvm))
 933                 return -ENXIO;
 934
 935         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
 936                                         irq_event->irq, irq_event->level,
 937                                         line_status);
 938         return 0;
 939 }
 940
 941 long kvm_arch_vm_ioctl(struct file *filp,
 942                 unsigned int ioctl, unsigned long arg)
 943 {
 944         struct kvm *kvm = filp->private_data;
 945         void __user *argp = (void __user *)arg;
 946         int r = -ENOTTY;
 947
 948         switch (ioctl) {
 949         case KVM_CREATE_IRQCHIP:
 950                 r = -EFAULT;
 951                 r = kvm_ioapic_init(kvm);
 952                 if (r)
 953                         goto out;
 954                 r = kvm_setup_default_irq_routing(kvm);
 955                 if (r) {
 956                         mutex_lock(&kvm->slots_lock);
 957                         kvm_ioapic_destroy(kvm);
 958                         mutex_unlock(&kvm->slots_lock);
 959                         goto out;
 960                 }
 961                 break;
 962         case KVM_GET_IRQCHIP: {
 963                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
 964                 struct kvm_irqchip chip;
 965
 966                 r = -EFAULT;
 967                 if (copy_from_user(&chip, argp, sizeof chip))
 968                                 goto out;
 969                 r = -ENXIO;
 970                 if (!irqchip_in_kernel(kvm))
 971                         goto out;
 972                 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
 973                 if (r)
 974                         goto out;
 975                 r = -EFAULT;
 976                 if (copy_to_user(argp, &chip, sizeof chip))
 977                                 goto out;
 978                 r = 0;
 979                 break;
 980                 }
 981         case KVM_SET_IRQCHIP: {
 982                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
 983                 struct kvm_irqchip chip;
 984
 985                 r = -EFAULT;
 986                 if (copy_from_user(&chip, argp, sizeof chip))
 987                                 goto out;
 988                 r = -ENXIO;
 989                 if (!irqchip_in_kernel(kvm))
 990                         goto out;
 991                 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
 992                 if (r)
 993                         goto out;
 994                 r = 0;
 995                 break;
 996                 }
 997         default:
 998                 ;
 999         }
1000 out:
1001         return r;
1002 }
1003
1004 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1005                 struct kvm_sregs *sregs)
1006 {
1007         return -EINVAL;
1008 }
1009
1010 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1011                 struct kvm_sregs *sregs)
1012 {
1013         return -EINVAL;
1014
1015 }
1016 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1017                 struct kvm_translation *tr)
1018 {
1019
1020         return -EINVAL;
1021 }
1022
1023 static int kvm_alloc_vmm_area(void)
1024 {
1025         if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1026                 kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1027                                 get_order(KVM_VMM_SIZE));
1028                 if (!kvm_vmm_base)
1029                         return -ENOMEM;
1030
1031                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1032                 kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1033
1034                 printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1035                                 kvm_vmm_base, kvm_vm_buffer);
1036         }
1037
1038         return 0;
1039 }
1040
1041 static void kvm_free_vmm_area(void)
1042 {
1043         if (kvm_vmm_base) {
1044                 /*Zero this area before free to avoid bits leak!!*/
1045                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1046                 free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1047                 kvm_vmm_base  = 0;
1048                 kvm_vm_buffer = 0;
1049                 kvm_vsa_base = 0;
1050         }
1051 }
1052
1053 static int vti_init_vpd(struct kvm_vcpu *vcpu)
1054 {
1055         int i;
1056         union cpuid3_t cpuid3;
1057         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1058
1059         if (IS_ERR(vpd))
1060                 return PTR_ERR(vpd);
1061
1062         /* CPUID init */
1063         for (i = 0; i < 5; i++)
1064                 vpd->vcpuid[i] = ia64_get_cpuid(i);
1065
1066         /* Limit the CPUID number to 5 */
1067         cpuid3.value = vpd->vcpuid[3];
1068         cpuid3.number = 4;      /* 5 - 1 */
1069         vpd->vcpuid[3] = cpuid3.value;
1070
1071         /*Set vac and vdc fields*/
1072         vpd->vac.a_from_int_cr = 1;
1073         vpd->vac.a_to_int_cr = 1;
1074         vpd->vac.a_from_psr = 1;
1075         vpd->vac.a_from_cpuid = 1;
1076         vpd->vac.a_cover = 1;
1077         vpd->vac.a_bsw = 1;
1078         vpd->vac.a_int = 1;
1079         vpd->vdc.d_vmsw = 1;
1080
1081         /*Set virtual buffer*/
1082         vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
1083
1084         return 0;
1085 }
1086
1087 static int vti_create_vp(struct kvm_vcpu *vcpu)
1088 {
1089         long ret;
1090         struct vpd *vpd = vcpu->arch.vpd;
1091         unsigned long  vmm_ivt;
1092
1093         vmm_ivt = kvm_vmm_info->vmm_ivt;
1094
1095         printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
1096
1097         ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
1098
1099         if (ret) {
1100                 printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
1101                 return -EINVAL;
1102         }
1103         return 0;
1104 }
1105
1106 static void init_ptce_info(struct kvm_vcpu *vcpu)
1107 {
1108         ia64_ptce_info_t ptce = {0};
1109
1110         ia64_get_ptce(&ptce);
1111         vcpu->arch.ptce_base = ptce.base;
1112         vcpu->arch.ptce_count[0] = ptce.count[0];
1113         vcpu->arch.ptce_count[1] = ptce.count[1];
1114         vcpu->arch.ptce_stride[0] = ptce.stride[0];
1115         vcpu->arch.ptce_stride[1] = ptce.stride[1];
1116 }
1117
1118 static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
1119 {
1120         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
1121
1122         if (hrtimer_cancel(p_ht))
1123                 hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
1124 }
1125
1126 static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
1127 {
1128         struct kvm_vcpu *vcpu;
1129         wait_queue_head_t *q;
1130
1131         vcpu  = container_of(data, struct kvm_vcpu, arch.hlt_timer);
1132         q = &vcpu->wq;
1133
1134         if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
1135                 goto out;
1136
1137         if (waitqueue_active(q))
1138                 wake_up_interruptible(q);
1139
1140 out:
1141         vcpu->arch.timer_fired = 1;
1142         vcpu->arch.timer_check = 1;
1143         return HRTIMER_NORESTART;
1144 }
1145
1146 #define PALE_RESET_ENTRY    0x80000000ffffffb0UL
1147
1148 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu)
1149 {
1150         return irqchip_in_kernel(vcpu->kvm) == (vcpu->arch.apic != NULL);
1151 }
1152
1153 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1154 {
1155         struct kvm_vcpu *v;
1156         int r;
1157         int i;
1158         long itc_offset;
1159         struct kvm *kvm = vcpu->kvm;
1160         struct kvm_pt_regs *regs = vcpu_regs(vcpu);
1161
1162         union context *p_ctx = &vcpu->arch.guest;
1163         struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
1164
1165         /*Init vcpu context for first run.*/
1166         if (IS_ERR(vmm_vcpu))
1167                 return PTR_ERR(vmm_vcpu);
1168
1169         if (kvm_vcpu_is_bsp(vcpu)) {
1170                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1171
1172                 /*Set entry address for first run.*/
1173                 regs->cr_iip = PALE_RESET_ENTRY;
1174
1175                 /*Initialize itc offset for vcpus*/
1176                 itc_offset = 0UL - kvm_get_itc(vcpu);
1177                 for (i = 0; i < KVM_MAX_VCPUS; i++) {
1178                         v = (struct kvm_vcpu *)((char *)vcpu +
1179                                         sizeof(struct kvm_vcpu_data) * i);
1180                         v->arch.itc_offset = itc_offset;
1181                         v->arch.last_itc = 0;
1182                 }
1183         } else
1184                 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
1185
1186         r = -ENOMEM;
1187         vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
1188         if (!vcpu->arch.apic)
1189                 goto out;
1190         vcpu->arch.apic->vcpu = vcpu;
1191
1192         p_ctx->gr[1] = 0;
1193         p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + KVM_STK_OFFSET);
1194         p_ctx->gr[13] = (unsigned long)vmm_vcpu;
1195         p_ctx->psr = 0x1008522000UL;
1196         p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
1197         p_ctx->caller_unat = 0;
1198         p_ctx->pr = 0x0;
1199         p_ctx->ar[36] = 0x0; /*unat*/
1200         p_ctx->ar[19] = 0x0; /*rnat*/
1201         p_ctx->ar[18] = (unsigned long)vmm_vcpu +
1202                                 ((sizeof(struct kvm_vcpu)+15) & ~15);
1203         p_ctx->ar[64] = 0x0; /*pfs*/
1204         p_ctx->cr[0] = 0x7e04UL;
1205         p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
1206         p_ctx->cr[8] = 0x3c;
1207
1208         /*Initialize region register*/
1209         p_ctx->rr[0] = 0x30;
1210         p_ctx->rr[1] = 0x30;
1211         p_ctx->rr[2] = 0x30;
1212         p_ctx->rr[3] = 0x30;
1213         p_ctx->rr[4] = 0x30;
1214         p_ctx->rr[5] = 0x30;
1215         p_ctx->rr[7] = 0x30;
1216
1217         /*Initialize branch register 0*/
1218         p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
1219
1220         vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
1221         vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
1222         vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
1223
1224         hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
1225         vcpu->arch.hlt_timer.function = hlt_timer_fn;
1226
1227         vcpu->arch.last_run_cpu = -1;
1228         vcpu->arch.vpd = (struct vpd *)VPD_BASE(vcpu->vcpu_id);
1229         vcpu->arch.vsa_base = kvm_vsa_base;
1230         vcpu->arch.__gp = kvm_vmm_gp;
1231         vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
1232         vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_BASE(vcpu->vcpu_id);
1233         vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(vcpu->vcpu_id);
1234         init_ptce_info(vcpu);
1235
1236         r = 0;
1237 out:
1238         return r;
1239 }
1240
1241 static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
1242 {
1243         unsigned long psr;
1244         int r;
1245
1246         local_irq_save(psr);
1247         r = kvm_insert_vmm_mapping(vcpu);
1248         local_irq_restore(psr);
1249         if (r)
1250                 goto fail;
1251         r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1252         if (r)
1253                 goto fail;
1254
1255         r = vti_init_vpd(vcpu);
1256         if (r) {
1257                 printk(KERN_DEBUG"kvm: vpd init error!!\n");
1258                 goto uninit;
1259         }
1260
1261         r = vti_create_vp(vcpu);
1262         if (r)
1263                 goto uninit;
1264
1265         kvm_purge_vmm_mapping(vcpu);
1266
1267         return 0;
1268 uninit:
1269         kvm_vcpu_uninit(vcpu);
1270 fail:
1271         return r;
1272 }
1273
1274 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1275                 unsigned int id)
1276 {
1277         struct kvm_vcpu *vcpu;
1278         unsigned long vm_base = kvm->arch.vm_base;
1279         int r;
1280         int cpu;
1281
1282         BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
1283
1284         r = -EINVAL;
1285         if (id >= KVM_MAX_VCPUS) {
1286                 printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
1287                                 KVM_MAX_VCPUS);
1288                 goto fail;
1289         }
1290
1291         r = -ENOMEM;
1292         if (!vm_base) {
1293                 printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1294                 goto fail;
1295         }
1296         vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
1297                                         vcpu_data[id].vcpu_struct));
1298         vcpu->kvm = kvm;
1299
1300         cpu = get_cpu();
1301         r = vti_vcpu_setup(vcpu, id);
1302         put_cpu();
1303
1304         if (r) {
1305                 printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1306                 goto fail;
1307         }
1308
1309         return vcpu;
1310 fail:
1311         return ERR_PTR(r);
1312 }
1313
1314 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1315 {
1316         return 0;
1317 }
1318
1319 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
1320 {
1321         return 0;
1322 }
1323
1324 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1325 {
1326         return -EINVAL;
1327 }
1328
1329 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1330 {
1331         return -EINVAL;
1332 }
1333
1334 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1335                                         struct kvm_guest_debug *dbg)
1336 {
1337         return -EINVAL;
1338 }
1339
1340 void kvm_arch_free_vm(struct kvm *kvm)
1341 {
1342         unsigned long vm_base = kvm->arch.vm_base;
1343
1344         if (vm_base) {
1345                 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1346                 free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1347         }
1348
1349 }
1350
1351 static void kvm_release_vm_pages(struct kvm *kvm)
1352 {
1353         struct kvm_memslots *slots;
1354         struct kvm_memory_slot *memslot;
1355         int j;
1356
1357         slots = kvm_memslots(kvm);
1358         kvm_for_each_memslot(memslot, slots) {
1359                 for (j = 0; j < memslot->npages; j++) {
1360                         if (memslot->rmap[j])
1361                                 put_page((struct page *)memslot->rmap[j]);
1362                 }
1363         }
1364 }
1365
1366 void kvm_arch_sync_events(struct kvm *kvm)
1367 {
1368 }
1369
1370 void kvm_arch_destroy_vm(struct kvm *kvm)
1371 {
1372         kvm_iommu_unmap_guest(kvm);
1373         kvm_free_all_assigned_devices(kvm);
1374         kfree(kvm->arch.vioapic);
1375         kvm_release_vm_pages(kvm);
1376 }
1377
1378 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1379 {
1380 }
1381
1382 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1383 {
1384         if (cpu != vcpu->cpu) {
1385                 vcpu->cpu = cpu;
1386                 if (vcpu->arch.ht_active)
1387                         kvm_migrate_hlt_timer(vcpu);
1388         }
1389 }
1390
1391 #define SAVE_REGS(_x)   regs->_x = vcpu->arch._x
1392
1393 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1394 {
1395         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1396         int i;
1397
1398         vcpu_load(vcpu);
1399
1400         for (i = 0; i < 16; i++) {
1401                 regs->vpd.vgr[i] = vpd->vgr[i];
1402                 regs->vpd.vbgr[i] = vpd->vbgr[i];
1403         }
1404         for (i = 0; i < 128; i++)
1405                 regs->vpd.vcr[i] = vpd->vcr[i];
1406         regs->vpd.vhpi = vpd->vhpi;
1407         regs->vpd.vnat = vpd->vnat;
1408         regs->vpd.vbnat = vpd->vbnat;
1409         regs->vpd.vpsr = vpd->vpsr;
1410         regs->vpd.vpr = vpd->vpr;
1411
1412         memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
1413
1414         SAVE_REGS(mp_state);
1415         SAVE_REGS(vmm_rr);
1416         memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1417         memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1418         SAVE_REGS(itr_regions);
1419         SAVE_REGS(dtr_regions);
1420         SAVE_REGS(tc_regions);
1421         SAVE_REGS(irq_check);
1422         SAVE_REGS(itc_check);
1423         SAVE_REGS(timer_check);
1424         SAVE_REGS(timer_pending);
1425         SAVE_REGS(last_itc);
1426         for (i = 0; i < 8; i++) {
1427                 regs->vrr[i] = vcpu->arch.vrr[i];
1428                 regs->ibr[i] = vcpu->arch.ibr[i];
1429                 regs->dbr[i] = vcpu->arch.dbr[i];
1430         }
1431         for (i = 0; i < 4; i++)
1432                 regs->insvc[i] = vcpu->arch.insvc[i];
1433         regs->saved_itc = vcpu->arch.itc_offset + kvm_get_itc(vcpu);
1434         SAVE_REGS(xtp);
1435         SAVE_REGS(metaphysical_rr0);
1436         SAVE_REGS(metaphysical_rr4);
1437         SAVE_REGS(metaphysical_saved_rr0);
1438         SAVE_REGS(metaphysical_saved_rr4);
1439         SAVE_REGS(fp_psr);
1440         SAVE_REGS(saved_gp);
1441
1442         vcpu_put(vcpu);
1443         return 0;
1444 }
1445
1446 int kvm_arch_vcpu_ioctl_get_stack(struct kvm_vcpu *vcpu,
1447                                   struct kvm_ia64_vcpu_stack *stack)
1448 {
1449         memcpy(stack, vcpu, sizeof(struct kvm_ia64_vcpu_stack));
1450         return 0;
1451 }
1452
1453 int kvm_arch_vcpu_ioctl_set_stack(struct kvm_vcpu *vcpu,
1454                                   struct kvm_ia64_vcpu_stack *stack)
1455 {
1456         memcpy(vcpu + 1, &stack->stack[0] + sizeof(struct kvm_vcpu),
1457                sizeof(struct kvm_ia64_vcpu_stack) - sizeof(struct kvm_vcpu));
1458
1459         vcpu->arch.exit_data = ((struct kvm_vcpu *)stack)->arch.exit_data;
1460         return 0;
1461 }
1462
1463 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1464 {
1465
1466         hrtimer_cancel(&vcpu->arch.hlt_timer);
1467         kfree(vcpu->arch.apic);
1468 }
1469
1470
1471 long kvm_arch_vcpu_ioctl(struct file *filp,
1472                          unsigned int ioctl, unsigned long arg)
1473 {
1474         struct kvm_vcpu *vcpu = filp->private_data;
1475         void __user *argp = (void __user *)arg;
1476         struct kvm_ia64_vcpu_stack *stack = NULL;
1477         long r;
1478
1479         switch (ioctl) {
1480         case KVM_IA64_VCPU_GET_STACK: {
1481                 struct kvm_ia64_vcpu_stack __user *user_stack;
1482                 void __user *first_p = argp;
1483
1484                 r = -EFAULT;
1485                 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1486                         goto out;
1487
1488                 if (!access_ok(VERIFY_WRITE, user_stack,
1489                                sizeof(struct kvm_ia64_vcpu_stack))) {
1490                         printk(KERN_INFO "KVM_IA64_VCPU_GET_STACK: "
1491                                "Illegal user destination address for stack\n");
1492                         goto out;
1493                 }
1494                 stack = kzalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1495                 if (!stack) {
1496                         r = -ENOMEM;
1497                         goto out;
1498                 }
1499
1500                 r = kvm_arch_vcpu_ioctl_get_stack(vcpu, stack);
1501                 if (r)
1502                         goto out;
1503
1504                 if (copy_to_user(user_stack, stack,
1505                                  sizeof(struct kvm_ia64_vcpu_stack))) {
1506                         r = -EFAULT;
1507                         goto out;
1508                 }
1509
1510                 break;
1511         }
1512         case KVM_IA64_VCPU_SET_STACK: {
1513                 struct kvm_ia64_vcpu_stack __user *user_stack;
1514                 void __user *first_p = argp;
1515
1516                 r = -EFAULT;
1517                 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1518                         goto out;
1519
1520                 if (!access_ok(VERIFY_READ, user_stack,
1521                             sizeof(struct kvm_ia64_vcpu_stack))) {
1522                         printk(KERN_INFO "KVM_IA64_VCPU_SET_STACK: "
1523                                "Illegal user address for stack\n");
1524                         goto out;
1525                 }
1526                 stack = kmalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1527                 if (!stack) {
1528                         r = -ENOMEM;
1529                         goto out;
1530                 }
1531                 if (copy_from_user(stack, user_stack,
1532                                    sizeof(struct kvm_ia64_vcpu_stack)))
1533                         goto out;
1534
1535                 r = kvm_arch_vcpu_ioctl_set_stack(vcpu, stack);
1536                 break;
1537         }
1538
1539         default:
1540                 r = -EINVAL;
1541         }
1542
1543 out:
1544         kfree(stack);
1545         return r;
1546 }
1547
1548 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1549 {
1550         return VM_FAULT_SIGBUS;
1551 }
1552
1553 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
1554                            struct kvm_memory_slot *dont)
1555 {
1556 }
1557
1558 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
1559 {
1560         return 0;
1561 }
1562
1563 int kvm_arch_prepare_memory_region(struct kvm *kvm,
1564                 struct kvm_memory_slot *memslot,
1565                 struct kvm_userspace_memory_region *mem,
1566                 enum kvm_mr_change change)
1567 {
1568         unsigned long i;
1569         unsigned long pfn;
1570         int npages = memslot->npages;
1571         unsigned long base_gfn = memslot->base_gfn;
1572
1573         if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
1574                 return -ENOMEM;
1575
1576         for (i = 0; i < npages; i++) {
1577                 pfn = gfn_to_pfn(kvm, base_gfn + i);
1578                 if (!kvm_is_mmio_pfn(pfn)) {
1579                         kvm_set_pmt_entry(kvm, base_gfn + i,
1580                                         pfn << PAGE_SHIFT,
1581                                 _PAGE_AR_RWX | _PAGE_MA_WB);
1582                         memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1583                 } else {
1584                         kvm_set_pmt_entry(kvm, base_gfn + i,
1585                                         GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1586                                         _PAGE_MA_UC);
1587                         memslot->rmap[i] = 0;
1588                         }
1589         }
1590
1591         return 0;
1592 }
1593
1594 void kvm_arch_commit_memory_region(struct kvm *kvm,
1595                 struct kvm_userspace_memory_region *mem,
1596                 const struct kvm_memory_slot *old,
1597                 enum kvm_mr_change change)
1598 {
1599         return;
1600 }
1601
1602 void kvm_arch_flush_shadow_all(struct kvm *kvm)
1603 {
1604         kvm_flush_remote_tlbs(kvm);
1605 }
1606
1607 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
1608                                    struct kvm_memory_slot *slot)
1609 {
1610         kvm_arch_flush_shadow_all();
1611 }
1612
1613 long kvm_arch_dev_ioctl(struct file *filp,
1614                         unsigned int ioctl, unsigned long arg)
1615 {
1616         return -EINVAL;
1617 }
1618
1619 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1620 {
1621         kvm_vcpu_uninit(vcpu);
1622 }
1623
1624 static int vti_cpu_has_kvm_support(void)
1625 {
1626         long  avail = 1, status = 1, control = 1;
1627         long ret;
1628
1629         ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1630         if (ret)
1631                 goto out;
1632
1633         if (!(avail & PAL_PROC_VM_BIT))
1634                 goto out;
1635
1636         printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1637
1638         ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1639         if (ret)
1640                 goto out;
1641         printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1642
1643         if (!(vp_env_info & VP_OPCODE)) {
1644                 printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1645                                 "vm_env_info:0x%lx\n", vp_env_info);
1646         }
1647
1648         return 1;
1649 out:
1650         return 0;
1651 }
1652
1653
1654 /*
1655  * On SN2, the ITC isn't stable, so copy in fast path code to use the
1656  * SN2 RTC, replacing the ITC based default verion.
1657  */
1658 static void kvm_patch_vmm(struct kvm_vmm_info *vmm_info,
1659                           struct module *module)
1660 {
1661         unsigned long new_ar, new_ar_sn2;
1662         unsigned long module_base;
1663
1664         if (!ia64_platform_is("sn2"))
1665                 return;
1666
1667         module_base = (unsigned long)module->module_core;
1668
1669         new_ar = kvm_vmm_base + vmm_info->patch_mov_ar - module_base;
1670         new_ar_sn2 = kvm_vmm_base + vmm_info->patch_mov_ar_sn2 - module_base;
1671
1672         printk(KERN_INFO "kvm: Patching ITC emulation to use SGI SN2 RTC "
1673                "as source\n");
1674
1675         /*
1676          * Copy the SN2 version of mov_ar into place. They are both
1677          * the same size, so 6 bundles is sufficient (6 * 0x10).
1678          */
1679         memcpy((void *)new_ar, (void *)new_ar_sn2, 0x60);
1680 }
1681
1682 static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1683                             struct module *module)
1684 {
1685         unsigned long module_base;
1686         unsigned long vmm_size;
1687
1688         unsigned long vmm_offset, func_offset, fdesc_offset;
1689         struct fdesc *p_fdesc;
1690
1691         BUG_ON(!module);
1692
1693         if (!kvm_vmm_base) {
1694                 printk("kvm: kvm area hasn't been initialized yet!!\n");
1695                 return -EFAULT;
1696         }
1697
1698         /*Calculate new position of relocated vmm module.*/
1699         module_base = (unsigned long)module->module_core;
1700         vmm_size = module->core_size;
1701         if (unlikely(vmm_size > KVM_VMM_SIZE))
1702                 return -EFAULT;
1703
1704         memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1705         kvm_patch_vmm(vmm_info, module);
1706         kvm_flush_icache(kvm_vmm_base, vmm_size);
1707
1708         /*Recalculate kvm_vmm_info based on new VMM*/
1709         vmm_offset = vmm_info->vmm_ivt - module_base;
1710         kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1711         printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1712                         kvm_vmm_info->vmm_ivt);
1713
1714         fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1715         kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1716                                                         fdesc_offset);
1717         func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1718         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1719         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1720         p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1721
1722         printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1723                         KVM_VMM_BASE+func_offset);
1724
1725         fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1726         kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1727                         fdesc_offset);
1728         func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1729         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1730         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1731         p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1732
1733         kvm_vmm_gp = p_fdesc->gp;
1734
1735         printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1736                                                 kvm_vmm_info->vmm_entry);
1737         printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1738                                                 KVM_VMM_BASE + func_offset);
1739
1740         return 0;
1741 }
1742
1743 int kvm_arch_init(void *opaque)
1744 {
1745         int r;
1746         struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1747
1748         if (!vti_cpu_has_kvm_support()) {
1749                 printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1750                 r = -EOPNOTSUPP;
1751                 goto out;
1752         }
1753
1754         if (kvm_vmm_info) {
1755                 printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1756                 r = -EEXIST;
1757                 goto out;
1758         }
1759
1760         r = -ENOMEM;
1761         kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1762         if (!kvm_vmm_info)
1763                 goto out;
1764
1765         if (kvm_alloc_vmm_area())
1766                 goto out_free0;
1767
1768         r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1769         if (r)
1770                 goto out_free1;
1771
1772         return 0;
1773
1774 out_free1:
1775         kvm_free_vmm_area();
1776 out_free0:
1777         kfree(kvm_vmm_info);
1778 out:
1779         return r;
1780 }
1781
1782 void kvm_arch_exit(void)
1783 {
1784         kvm_free_vmm_area();
1785         kfree(kvm_vmm_info);
1786         kvm_vmm_info = NULL;
1787 }
1788
1789 static void kvm_ia64_sync_dirty_log(struct kvm *kvm,
1790                                     struct kvm_memory_slot *memslot)
1791 {
1792         int i;
1793         long base;
1794         unsigned long n;
1795         unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
1796                         offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
1797
1798         n = kvm_dirty_bitmap_bytes(memslot);
1799         base = memslot->base_gfn / BITS_PER_LONG;
1800
1801         spin_lock(&kvm->arch.dirty_log_lock);
1802         for (i = 0; i < n/sizeof(long); ++i) {
1803                 memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1804                 dirty_bitmap[base + i] = 0;
1805         }
1806         spin_unlock(&kvm->arch.dirty_log_lock);
1807 }
1808
1809 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1810                 struct kvm_dirty_log *log)
1811 {
1812         int r;
1813         unsigned long n;
1814         struct kvm_memory_slot *memslot;
1815         int is_dirty = 0;
1816
1817         mutex_lock(&kvm->slots_lock);
1818
1819         r = -EINVAL;
1820         if (log->slot >= KVM_USER_MEM_SLOTS)
1821                 goto out;
1822
1823         memslot = id_to_memslot(kvm->memslots, log->slot);
1824         r = -ENOENT;
1825         if (!memslot->dirty_bitmap)
1826                 goto out;
1827
1828         kvm_ia64_sync_dirty_log(kvm, memslot);
1829         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1830         if (r)
1831                 goto out;
1832
1833         /* If nothing is dirty, don't bother messing with page tables. */
1834         if (is_dirty) {
1835                 kvm_flush_remote_tlbs(kvm);
1836                 n = kvm_dirty_bitmap_bytes(memslot);
1837                 memset(memslot->dirty_bitmap, 0, n);
1838         }
1839         r = 0;
1840 out:
1841         mutex_unlock(&kvm->slots_lock);
1842         return r;
1843 }
1844
1845 int kvm_arch_hardware_setup(void)
1846 {
1847         return 0;
1848 }
1849
1850 void kvm_arch_hardware_unsetup(void)
1851 {
1852 }
1853
1854 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)
1855 {
1856         return __apic_accept_irq(vcpu, irq->vector);
1857 }
1858
1859 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1860 {
1861         return apic->vcpu->vcpu_id == dest;
1862 }
1863
1864 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1865 {
1866         return 0;
1867 }
1868
1869 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
1870 {
1871         return vcpu1->arch.xtp - vcpu2->arch.xtp;
1872 }
1873
1874 int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
1875                 int short_hand, int dest, int dest_mode)
1876 {
1877         struct kvm_lapic *target = vcpu->arch.apic;
1878         return (dest_mode == 0) ?
1879                 kvm_apic_match_physical_addr(target, dest) :
1880                 kvm_apic_match_logical_addr(target, dest);
1881 }
1882
1883 static int find_highest_bits(int *dat)
1884 {
1885         u32  bits, bitnum;
1886         int i;
1887
1888         /* loop for all 256 bits */
1889         for (i = 7; i >= 0 ; i--) {
1890                 bits = dat[i];
1891                 if (bits) {
1892                         bitnum = fls(bits);
1893                         return i * 32 + bitnum - 1;
1894                 }
1895         }
1896
1897         return -1;
1898 }
1899
1900 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1901 {
1902     struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1903
1904     if (vpd->irr[0] & (1UL << NMI_VECTOR))
1905                 return NMI_VECTOR;
1906     if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1907                 return ExtINT_VECTOR;
1908
1909     return find_highest_bits((int *)&vpd->irr[0]);
1910 }
1911
1912 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1913 {
1914         return vcpu->arch.timer_fired;
1915 }
1916
1917 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1918 {
1919         return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) ||
1920                 (kvm_highest_pending_irq(vcpu) != -1);
1921 }
1922
1923 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
1924 {
1925         return (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests));
1926 }
1927
1928 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1929                                     struct kvm_mp_state *mp_state)
1930 {
1931         mp_state->mp_state = vcpu->arch.mp_state;
1932         return 0;
1933 }
1934
1935 static int vcpu_reset(struct kvm_vcpu *vcpu)
1936 {
1937         int r;
1938         long psr;
1939         local_irq_save(psr);
1940         r = kvm_insert_vmm_mapping(vcpu);
1941         local_irq_restore(psr);
1942         if (r)
1943                 goto fail;
1944
1945         vcpu->arch.launched = 0;
1946         kvm_arch_vcpu_uninit(vcpu);
1947         r = kvm_arch_vcpu_init(vcpu);
1948         if (r)
1949                 goto fail;
1950
1951         kvm_purge_vmm_mapping(vcpu);
1952         r = 0;
1953 fail:
1954         return r;
1955 }
1956
1957 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1958                                     struct kvm_mp_state *mp_state)
1959 {
1960         int r = 0;
1961
1962         vcpu->arch.mp_state = mp_state->mp_state;
1963         if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
1964                 r = vcpu_reset(vcpu);
1965         return r;
1966 }