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/fs.h>
  27 #include <linux/slab.h>
  28 #include <linux/smp.h>
  29 #include <linux/kvm_host.h>
  30 #include <linux/kvm.h>
  31 #include <linux/bitops.h>
  32 #include <linux/hrtimer.h>
  33 #include <linux/uaccess.h>
  34 #include <linux/iommu.h>
  35 #include <linux/intel-iommu.h>
  36
  37 #include <asm/pgtable.h>
  38 #include <asm/gcc_intrin.h>
  39 #include <asm/pal.h>
  40 #include <asm/cacheflush.h>
  41 #include <asm/div64.h>
  42 #include <asm/tlb.h>
  43 #include <asm/elf.h>
  44 #include <asm/sn/addrs.h>
  45 #include <asm/sn/clksupport.h>
  46 #include <asm/sn/shub_mmr.h>
  47
  48 #include "misc.h"
  49 #include "vti.h"
  50 #include "iodev.h"
  51 #include "ioapic.h"
  52 #include "lapic.h"
  53 #include "irq.h"
  54
  55 static unsigned long kvm_vmm_base;
  56 static unsigned long kvm_vsa_base;
  57 static unsigned long kvm_vm_buffer;
  58 static unsigned long kvm_vm_buffer_size;
  59 unsigned long kvm_vmm_gp;
  60
  61 static long vp_env_info;
  62
  63 static struct kvm_vmm_info *kvm_vmm_info;
  64
  65 static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu);
  66
  67 struct kvm_stats_debugfs_item debugfs_entries[] = {
  68         { NULL }
  69 };
  70
  71 static unsigned long kvm_get_itc(struct kvm_vcpu *vcpu)
  72 {
  73 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
  74         if (vcpu->kvm->arch.is_sn2)
  75                 return rtc_time();
  76         else
  77 #endif
  78                 return ia64_getreg(_IA64_REG_AR_ITC);
  79 }
  80
  81 static void kvm_flush_icache(unsigned long start, unsigned long len)
  82 {
  83         int l;
  84
  85         for (l = 0; l < (len + 32); l += 32)
  86                 ia64_fc((void *)(start + l));
  87
  88         ia64_sync_i();
  89         ia64_srlz_i();
  90 }
  91
  92 static void kvm_flush_tlb_all(void)
  93 {
  94         unsigned long i, j, count0, count1, stride0, stride1, addr;
  95         long flags;
  96
  97         addr    = local_cpu_data->ptce_base;
  98         count0  = local_cpu_data->ptce_count[0];
  99         count1  = local_cpu_data->ptce_count[1];
 100         stride0 = local_cpu_data->ptce_stride[0];
 101         stride1 = local_cpu_data->ptce_stride[1];
 102
 103         local_irq_save(flags);
 104         for (i = 0; i < count0; ++i) {
 105                 for (j = 0; j < count1; ++j) {
 106                         ia64_ptce(addr);
 107                         addr += stride1;
 108                 }
 109                 addr += stride0;
 110         }
 111         local_irq_restore(flags);
 112         ia64_srlz_i();                  /* srlz.i implies srlz.d */
 113 }
 114
 115 long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler)
 116 {
 117         struct ia64_pal_retval iprv;
 118
 119         PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva,
 120                         (u64)opt_handler);
 121
 122         return iprv.status;
 123 }
 124
 125 static  DEFINE_SPINLOCK(vp_lock);
 126
 127 int kvm_arch_hardware_enable(void *garbage)
 128 {
 129         long  status;
 130         long  tmp_base;
 131         unsigned long pte;
 132         unsigned long saved_psr;
 133         int slot;
 134
 135         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
 136         local_irq_save(saved_psr);
 137         slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 138         local_irq_restore(saved_psr);
 139         if (slot < 0)
 140                 return -EINVAL;
 141
 142         spin_lock(&vp_lock);
 143         status = ia64_pal_vp_init_env(kvm_vsa_base ?
 144                                 VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
 145                         __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
 146         if (status != 0) {
 147                 spin_unlock(&vp_lock);
 148                 printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
 149                 return -EINVAL;
 150         }
 151
 152         if (!kvm_vsa_base) {
 153                 kvm_vsa_base = tmp_base;
 154                 printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
 155         }
 156         spin_unlock(&vp_lock);
 157         ia64_ptr_entry(0x3, slot);
 158
 159         return 0;
 160 }
 161
 162 void kvm_arch_hardware_disable(void *garbage)
 163 {
 164
 165         long status;
 166         int slot;
 167         unsigned long pte;
 168         unsigned long saved_psr;
 169         unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
 170
 171         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
 172                                 PAGE_KERNEL));
 173
 174         local_irq_save(saved_psr);
 175         slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 176         local_irq_restore(saved_psr);
 177         if (slot < 0)
 178                 return;
 179
 180         status = ia64_pal_vp_exit_env(host_iva);
 181         if (status)
 182                 printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
 183                                 status);
 184         ia64_ptr_entry(0x3, slot);
 185 }
 186
 187 void kvm_arch_check_processor_compat(void *rtn)
 188 {
 189         *(int *)rtn = 0;
 190 }
 191
 192 int kvm_dev_ioctl_check_extension(long ext)
 193 {
 194
 195         int r;
 196
 197         switch (ext) {
 198         case KVM_CAP_IRQCHIP:
 199         case KVM_CAP_MP_STATE:
 200         case KVM_CAP_IRQ_INJECT_STATUS:
 201                 r = 1;
 202                 break;
 203         case KVM_CAP_COALESCED_MMIO:
 204                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 205                 break;
 206         case KVM_CAP_IOMMU:
 207                 r = iommu_found();
 208                 break;
 209         default:
 210                 r = 0;
 211         }
 212         return r;
 213
 214 }
 215
 216 static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 217 {
 218         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 219         kvm_run->hw.hardware_exit_reason = 1;
 220         return 0;
 221 }
 222
 223 static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 224 {
 225         struct kvm_mmio_req *p;
 226         struct kvm_io_device *mmio_dev;
 227         int r;
 228
 229         p = kvm_get_vcpu_ioreq(vcpu);
 230
 231         if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS)
 232                 goto mmio;
 233         vcpu->mmio_needed = 1;
 234         vcpu->mmio_phys_addr = kvm_run->mmio.phys_addr = p->addr;
 235         vcpu->mmio_size = kvm_run->mmio.len = p->size;
 236         vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir;
 237
 238         if (vcpu->mmio_is_write)
 239                 memcpy(vcpu->mmio_data, &p->data, p->size);
 240         memcpy(kvm_run->mmio.data, &p->data, p->size);
 241         kvm_run->exit_reason = KVM_EXIT_MMIO;
 242         return 0;
 243 mmio:
 244         if (p->dir)
 245                 r = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, p->addr,
 246                                     p->size, &p->data);
 247         else
 248                 r = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, p->addr,
 249                                      p->size, &p->data);
 250         if (r)
 251                 printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr);
 252         p->state = STATE_IORESP_READY;
 253
 254         return 1;
 255 }
 256
 257 static int handle_pal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 258 {
 259         struct exit_ctl_data *p;
 260
 261         p = kvm_get_exit_data(vcpu);
 262
 263         if (p->exit_reason == EXIT_REASON_PAL_CALL)
 264                 return kvm_pal_emul(vcpu, kvm_run);
 265         else {
 266                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 267                 kvm_run->hw.hardware_exit_reason = 2;
 268                 return 0;
 269         }
 270 }
 271
 272 static int handle_sal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 273 {
 274         struct exit_ctl_data *p;
 275
 276         p = kvm_get_exit_data(vcpu);
 277
 278         if (p->exit_reason == EXIT_REASON_SAL_CALL) {
 279                 kvm_sal_emul(vcpu);
 280                 return 1;
 281         } else {
 282                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 283                 kvm_run->hw.hardware_exit_reason = 3;
 284                 return 0;
 285         }
 286
 287 }
 288
 289 static int __apic_accept_irq(struct kvm_vcpu *vcpu, uint64_t vector)
 290 {
 291         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 292
 293         if (!test_and_set_bit(vector, &vpd->irr[0])) {
 294                 vcpu->arch.irq_new_pending = 1;
 295                 kvm_vcpu_kick(vcpu);
 296                 return 1;
 297         }
 298         return 0;
 299 }
 300
 301 /*
 302  *  offset: address offset to IPI space.
 303  *  value:  deliver value.
 304  */
 305 static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm,
 306                                 uint64_t vector)
 307 {
 308         switch (dm) {
 309         case SAPIC_FIXED:
 310                 break;
 311         case SAPIC_NMI:
 312                 vector = 2;
 313                 break;
 314         case SAPIC_EXTINT:
 315                 vector = 0;
 316                 break;
 317         case SAPIC_INIT:
 318         case SAPIC_PMI:
 319         default:
 320                 printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n");
 321                 return;
 322         }
 323         __apic_accept_irq(vcpu, vector);
 324 }
 325
 326 static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id,
 327                         unsigned long eid)
 328 {
 329         union ia64_lid lid;
 330         int i;
 331         struct kvm_vcpu *vcpu;
 332
 333         kvm_for_each_vcpu(i, vcpu, kvm) {
 334                 lid.val = VCPU_LID(vcpu);
 335                 if (lid.id == id && lid.eid == eid)
 336                         return vcpu;
 337         }
 338
 339         return NULL;
 340 }
 341
 342 static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 343 {
 344         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 345         struct kvm_vcpu *target_vcpu;
 346         struct kvm_pt_regs *regs;
 347         union ia64_ipi_a addr = p->u.ipi_data.addr;
 348         union ia64_ipi_d data = p->u.ipi_data.data;
 349
 350         target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid);
 351         if (!target_vcpu)
 352                 return handle_vm_error(vcpu, kvm_run);
 353
 354         if (!target_vcpu->arch.launched) {
 355                 regs = vcpu_regs(target_vcpu);
 356
 357                 regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip;
 358                 regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp;
 359
 360                 target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 361                 if (waitqueue_active(&target_vcpu->wq))
 362                         wake_up_interruptible(&target_vcpu->wq);
 363         } else {
 364                 vcpu_deliver_ipi(target_vcpu, data.dm, data.vector);
 365                 if (target_vcpu != vcpu)
 366                         kvm_vcpu_kick(target_vcpu);
 367         }
 368
 369         return 1;
 370 }
 371
 372 struct call_data {
 373         struct kvm_ptc_g ptc_g_data;
 374         struct kvm_vcpu *vcpu;
 375 };
 376
 377 static void vcpu_global_purge(void *info)
 378 {
 379         struct call_data *p = (struct call_data *)info;
 380         struct kvm_vcpu *vcpu = p->vcpu;
 381
 382         if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
 383                 return;
 384
 385         set_bit(KVM_REQ_PTC_G, &vcpu->requests);
 386         if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) {
 387                 vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] =
 388                                                         p->ptc_g_data;
 389         } else {
 390                 clear_bit(KVM_REQ_PTC_G, &vcpu->requests);
 391                 vcpu->arch.ptc_g_count = 0;
 392                 set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
 393         }
 394 }
 395
 396 static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 397 {
 398         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 399         struct kvm *kvm = vcpu->kvm;
 400         struct call_data call_data;
 401         int i;
 402         struct kvm_vcpu *vcpui;
 403
 404         call_data.ptc_g_data = p->u.ptc_g_data;
 405
 406         kvm_for_each_vcpu(i, vcpui, kvm) {
 407                 if (vcpui->arch.mp_state == KVM_MP_STATE_UNINITIALIZED ||
 408                                 vcpu == vcpui)
 409                         continue;
 410
 411                 if (waitqueue_active(&vcpui->wq))
 412                         wake_up_interruptible(&vcpui->wq);
 413
 414                 if (vcpui->cpu != -1) {
 415                         call_data.vcpu = vcpui;
 416                         smp_call_function_single(vcpui->cpu,
 417                                         vcpu_global_purge, &call_data, 1);
 418                 } else
 419                         printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
 420
 421         }
 422         return 1;
 423 }
 424
 425 static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 426 {
 427         return 1;
 428 }
 429
 430 static int kvm_sn2_setup_mappings(struct kvm_vcpu *vcpu)
 431 {
 432         unsigned long pte, rtc_phys_addr, map_addr;
 433         int slot;
 434
 435         map_addr = KVM_VMM_BASE + (1UL << KVM_VMM_SHIFT);
 436         rtc_phys_addr = LOCAL_MMR_OFFSET | SH_RTC;
 437         pte = pte_val(mk_pte_phys(rtc_phys_addr, PAGE_KERNEL_UC));
 438         slot = ia64_itr_entry(0x3, map_addr, pte, PAGE_SHIFT);
 439         vcpu->arch.sn_rtc_tr_slot = slot;
 440         if (slot < 0) {
 441                 printk(KERN_ERR "Mayday mayday! RTC mapping failed!\n");
 442                 slot = 0;
 443         }
 444         return slot;
 445 }
 446
 447 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
 448 {
 449
 450         ktime_t kt;
 451         long itc_diff;
 452         unsigned long vcpu_now_itc;
 453         unsigned long expires;
 454         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
 455         unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
 456         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 457
 458         if (irqchip_in_kernel(vcpu->kvm)) {
 459
 460                 vcpu_now_itc = kvm_get_itc(vcpu) + vcpu->arch.itc_offset;
 461
 462                 if (time_after(vcpu_now_itc, vpd->itm)) {
 463                         vcpu->arch.timer_check = 1;
 464                         return 1;
 465                 }
 466                 itc_diff = vpd->itm - vcpu_now_itc;
 467                 if (itc_diff < 0)
 468                         itc_diff = -itc_diff;
 469
 470                 expires = div64_u64(itc_diff, cyc_per_usec);
 471                 kt = ktime_set(0, 1000 * expires);
 472
 473                 vcpu->arch.ht_active = 1;
 474                 hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
 475
 476                 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
 477                 kvm_vcpu_block(vcpu);
 478                 hrtimer_cancel(p_ht);
 479                 vcpu->arch.ht_active = 0;
 480
 481                 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests) ||
 482                                 kvm_cpu_has_pending_timer(vcpu))
 483                         if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
 484                                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 485
 486                 if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
 487                         return -EINTR;
 488                 return 1;
 489         } else {
 490                 printk(KERN_ERR"kvm: Unsupported userspace halt!");
 491                 return 0;
 492         }
 493 }
 494
 495 static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
 496                 struct kvm_run *kvm_run)
 497 {
 498         kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
 499         return 0;
 500 }
 501
 502 static int handle_external_interrupt(struct kvm_vcpu *vcpu,
 503                 struct kvm_run *kvm_run)
 504 {
 505         return 1;
 506 }
 507
 508 static int handle_vcpu_debug(struct kvm_vcpu *vcpu,
 509                                 struct kvm_run *kvm_run)
 510 {
 511         printk("VMM: %s", vcpu->arch.log_buf);
 512         return 1;
 513 }
 514
 515 static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
 516                 struct kvm_run *kvm_run) = {
 517         [EXIT_REASON_VM_PANIC]              = handle_vm_error,
 518         [EXIT_REASON_MMIO_INSTRUCTION]      = handle_mmio,
 519         [EXIT_REASON_PAL_CALL]              = handle_pal_call,
 520         [EXIT_REASON_SAL_CALL]              = handle_sal_call,
 521         [EXIT_REASON_SWITCH_RR6]            = handle_switch_rr6,
 522         [EXIT_REASON_VM_DESTROY]            = handle_vm_shutdown,
 523         [EXIT_REASON_EXTERNAL_INTERRUPT]    = handle_external_interrupt,
 524         [EXIT_REASON_IPI]                   = handle_ipi,
 525         [EXIT_REASON_PTC_G]                 = handle_global_purge,
 526         [EXIT_REASON_DEBUG]                 = handle_vcpu_debug,
 527
 528 };
 529
 530 static const int kvm_vti_max_exit_handlers =
 531                 sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
 532
 533 static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
 534 {
 535         struct exit_ctl_data *p_exit_data;
 536
 537         p_exit_data = kvm_get_exit_data(vcpu);
 538         return p_exit_data->exit_reason;
 539 }
 540
 541 /*
 542  * The guest has exited.  See if we can fix it or if we need userspace
 543  * assistance.
 544  */
 545 static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 546 {
 547         u32 exit_reason = kvm_get_exit_reason(vcpu);
 548         vcpu->arch.last_exit = exit_reason;
 549
 550         if (exit_reason < kvm_vti_max_exit_handlers
 551                         && kvm_vti_exit_handlers[exit_reason])
 552                 return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
 553         else {
 554                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 555                 kvm_run->hw.hardware_exit_reason = exit_reason;
 556         }
 557         return 0;
 558 }
 559
 560 static inline void vti_set_rr6(unsigned long rr6)
 561 {
 562         ia64_set_rr(RR6, rr6);
 563         ia64_srlz_i();
 564 }
 565
 566 static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
 567 {
 568         unsigned long pte;
 569         struct kvm *kvm = vcpu->kvm;
 570         int r;
 571
 572         /*Insert a pair of tr to map vmm*/
 573         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
 574         r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 575         if (r < 0)
 576                 goto out;
 577         vcpu->arch.vmm_tr_slot = r;
 578         /*Insert a pairt of tr to map data of vm*/
 579         pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
 580         r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
 581                                         pte, KVM_VM_DATA_SHIFT);
 582         if (r < 0)
 583                 goto out;
 584         vcpu->arch.vm_tr_slot = r;
 585
 586 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 587         if (kvm->arch.is_sn2) {
 588                 r = kvm_sn2_setup_mappings(vcpu);
 589                 if (r < 0)
 590                         goto out;
 591         }
 592 #endif
 593
 594         r = 0;
 595 out:
 596         return r;
 597 }
 598
 599 static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
 600 {
 601         struct kvm *kvm = vcpu->kvm;
 602         ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
 603         ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
 604 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 605         if (kvm->arch.is_sn2)
 606                 ia64_ptr_entry(0x3, vcpu->arch.sn_rtc_tr_slot);
 607 #endif
 608 }
 609
 610 static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
 611 {
 612         unsigned long psr;
 613         int r;
 614         int cpu = smp_processor_id();
 615
 616         if (vcpu->arch.last_run_cpu != cpu ||
 617                         per_cpu(last_vcpu, cpu) != vcpu) {
 618                 per_cpu(last_vcpu, cpu) = vcpu;
 619                 vcpu->arch.last_run_cpu = cpu;
 620                 kvm_flush_tlb_all();
 621         }
 622
 623         vcpu->arch.host_rr6 = ia64_get_rr(RR6);
 624         vti_set_rr6(vcpu->arch.vmm_rr);
 625         local_irq_save(psr);
 626         r = kvm_insert_vmm_mapping(vcpu);
 627         local_irq_restore(psr);
 628         return r;
 629 }
 630
 631 static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
 632 {
 633         kvm_purge_vmm_mapping(vcpu);
 634         vti_set_rr6(vcpu->arch.host_rr6);
 635 }
 636
 637 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 638 {
 639         union context *host_ctx, *guest_ctx;
 640         int r, idx;
 641
 642         idx = srcu_read_lock(&vcpu->kvm->srcu);
 643
 644 again:
 645         if (signal_pending(current)) {
 646                 r = -EINTR;
 647                 kvm_run->exit_reason = KVM_EXIT_INTR;
 648                 goto out;
 649         }
 650
 651         preempt_disable();
 652         local_irq_disable();
 653
 654         /*Get host and guest context with guest address space.*/
 655         host_ctx = kvm_get_host_context(vcpu);
 656         guest_ctx = kvm_get_guest_context(vcpu);
 657
 658         clear_bit(KVM_REQ_KICK, &vcpu->requests);
 659
 660         r = kvm_vcpu_pre_transition(vcpu);
 661         if (r < 0)
 662                 goto vcpu_run_fail;
 663
 664         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 665         kvm_guest_enter();
 666
 667         /*
 668          * Transition to the guest
 669          */
 670         kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
 671
 672         kvm_vcpu_post_transition(vcpu);
 673
 674         vcpu->arch.launched = 1;
 675         set_bit(KVM_REQ_KICK, &vcpu->requests);
 676         local_irq_enable();
 677
 678         /*
 679          * We must have an instruction between local_irq_enable() and
 680          * kvm_guest_exit(), so the timer interrupt isn't delayed by
 681          * the interrupt shadow.  The stat.exits increment will do nicely.
 682          * But we need to prevent reordering, hence this barrier():
 683          */
 684         barrier();
 685         kvm_guest_exit();
 686         preempt_enable();
 687
 688         idx = srcu_read_lock(&vcpu->kvm->srcu);
 689
 690         r = kvm_handle_exit(kvm_run, vcpu);
 691
 692         if (r > 0) {
 693                 if (!need_resched())
 694                         goto again;
 695         }
 696
 697 out:
 698         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 699         if (r > 0) {
 700                 kvm_resched(vcpu);
 701                 idx = srcu_read_lock(&vcpu->kvm->srcu);
 702                 goto again;
 703         }
 704
 705         return r;
 706
 707 vcpu_run_fail:
 708         local_irq_enable();
 709         preempt_enable();
 710         kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
 711         goto out;
 712 }
 713
 714 static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
 715 {
 716         struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
 717
 718         if (!vcpu->mmio_is_write)
 719                 memcpy(&p->data, vcpu->mmio_data, 8);
 720         p->state = STATE_IORESP_READY;
 721 }
 722
 723 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 724 {
 725         int r;
 726         sigset_t sigsaved;
 727
 728         if (vcpu->sigset_active)
 729                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 730
 731         if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
 732                 kvm_vcpu_block(vcpu);
 733                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 734                 r = -EAGAIN;
 735                 goto out;
 736         }
 737
 738         if (vcpu->mmio_needed) {
 739                 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
 740                 kvm_set_mmio_data(vcpu);
 741                 vcpu->mmio_read_completed = 1;
 742                 vcpu->mmio_needed = 0;
 743         }
 744         r = __vcpu_run(vcpu, kvm_run);
 745 out:
 746         if (vcpu->sigset_active)
 747                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 748
 749         return r;
 750 }
 751
 752 struct kvm *kvm_arch_alloc_vm(void)
 753 {
 754
 755         struct kvm *kvm;
 756         uint64_t  vm_base;
 757
 758         BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
 759
 760         vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
 761
 762         if (!vm_base)
 763                 return NULL;
 764
 765         memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
 766         kvm = (struct kvm *)(vm_base +
 767                         offsetof(struct kvm_vm_data, kvm_vm_struct));
 768         kvm->arch.vm_base = vm_base;
 769         printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
 770
 771         return kvm;
 772 }
 773
 774 struct kvm_io_range {
 775         unsigned long start;
 776         unsigned long size;
 777         unsigned long type;
 778 };
 779
 780 static const struct kvm_io_range io_ranges[] = {
 781         {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
 782         {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
 783         {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
 784         {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
 785         {PIB_START, PIB_SIZE, GPFN_PIB},
 786 };
 787
 788 static void kvm_build_io_pmt(struct kvm *kvm)
 789 {
 790         unsigned long i, j;
 791
 792         /* Mark I/O ranges */
 793         for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
 794                                                         i++) {
 795                 for (j = io_ranges[i].start;
 796                                 j < io_ranges[i].start + io_ranges[i].size;
 797                                 j += PAGE_SIZE)
 798                         kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
 799                                         io_ranges[i].type, 0);
 800         }
 801
 802 }
 803
 804 /*Use unused rids to virtualize guest rid.*/
 805 #define GUEST_PHYSICAL_RR0      0x1739
 806 #define GUEST_PHYSICAL_RR4      0x2739
 807 #define VMM_INIT_RR             0x1660
 808
 809 int kvm_arch_init_vm(struct kvm *kvm)
 810 {
 811         BUG_ON(!kvm);
 812
 813         kvm->arch.is_sn2 = ia64_platform_is("sn2");
 814
 815         kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
 816         kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
 817         kvm->arch.vmm_init_rr = VMM_INIT_RR;
 818
 819         /*
 820          *Fill P2M entries for MMIO/IO ranges
 821          */
 822         kvm_build_io_pmt(kvm);
 823
 824         INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
 825
 826         /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
 827         set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
 828
 829         return 0;
 830 }
 831
 832 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
 833                                         struct kvm_irqchip *chip)
 834 {
 835         int r;
 836
 837         r = 0;
 838         switch (chip->chip_id) {
 839         case KVM_IRQCHIP_IOAPIC:
 840                 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
 841                 break;
 842         default:
 843                 r = -EINVAL;
 844                 break;
 845         }
 846         return r;
 847 }
 848
 849 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
 850 {
 851         int r;
 852
 853         r = 0;
 854         switch (chip->chip_id) {
 855         case KVM_IRQCHIP_IOAPIC:
 856                 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
 857                 break;
 858         default:
 859                 r = -EINVAL;
 860                 break;
 861         }
 862         return r;
 863 }
 864
 865 #define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
 866
 867 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 868 {
 869         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 870         int i;
 871
 872         for (i = 0; i < 16; i++) {
 873                 vpd->vgr[i] = regs->vpd.vgr[i];
 874                 vpd->vbgr[i] = regs->vpd.vbgr[i];
 875         }
 876         for (i = 0; i < 128; i++)
 877                 vpd->vcr[i] = regs->vpd.vcr[i];
 878         vpd->vhpi = regs->vpd.vhpi;
 879         vpd->vnat = regs->vpd.vnat;
 880         vpd->vbnat = regs->vpd.vbnat;
 881         vpd->vpsr = regs->vpd.vpsr;
 882
 883         vpd->vpr = regs->vpd.vpr;
 884
 885         memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
 886
 887         RESTORE_REGS(mp_state);
 888         RESTORE_REGS(vmm_rr);
 889         memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
 890         memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
 891         RESTORE_REGS(itr_regions);
 892         RESTORE_REGS(dtr_regions);
 893         RESTORE_REGS(tc_regions);
 894         RESTORE_REGS(irq_check);
 895         RESTORE_REGS(itc_check);
 896         RESTORE_REGS(timer_check);
 897         RESTORE_REGS(timer_pending);
 898         RESTORE_REGS(last_itc);
 899         for (i = 0; i < 8; i++) {
 900                 vcpu->arch.vrr[i] = regs->vrr[i];
 901                 vcpu->arch.ibr[i] = regs->ibr[i];
 902                 vcpu->arch.dbr[i] = regs->dbr[i];
 903         }
 904         for (i = 0; i < 4; i++)
 905                 vcpu->arch.insvc[i] = regs->insvc[i];
 906         RESTORE_REGS(xtp);
 907         RESTORE_REGS(metaphysical_rr0);
 908         RESTORE_REGS(metaphysical_rr4);
 909         RESTORE_REGS(metaphysical_saved_rr0);
 910         RESTORE_REGS(metaphysical_saved_rr4);
 911         RESTORE_REGS(fp_psr);
 912         RESTORE_REGS(saved_gp);
 913
 914         vcpu->arch.irq_new_pending = 1;
 915         vcpu->arch.itc_offset = regs->saved_itc - kvm_get_itc(vcpu);
 916         set_bit(KVM_REQ_RESUME, &vcpu->requests);
 917
 918         return 0;
 919 }
 920
 921 long kvm_arch_vm_ioctl(struct file *filp,
 922                 unsigned int ioctl, unsigned long arg)
 923 {
 924         struct kvm *kvm = filp->private_data;
 925         void __user *argp = (void __user *)arg;
 926         int r = -ENOTTY;
 927
 928         switch (ioctl) {
 929         case KVM_SET_MEMORY_REGION: {
 930                 struct kvm_memory_region kvm_mem;
 931                 struct kvm_userspace_memory_region kvm_userspace_mem;
 932
 933                 r = -EFAULT;
 934                 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
 935                         goto out;
 936                 kvm_userspace_mem.slot = kvm_mem.slot;
 937                 kvm_userspace_mem.flags = kvm_mem.flags;
 938                 kvm_userspace_mem.guest_phys_addr =
 939                                         kvm_mem.guest_phys_addr;
 940                 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
 941                 r = kvm_vm_ioctl_set_memory_region(kvm,
 942                                         &kvm_userspace_mem, 0);
 943                 if (r)
 944                         goto out;
 945                 break;
 946                 }
 947         case KVM_CREATE_IRQCHIP:
 948                 r = -EFAULT;
 949                 r = kvm_ioapic_init(kvm);
 950                 if (r)
 951                         goto out;
 952                 r = kvm_setup_default_irq_routing(kvm);
 953                 if (r) {
 954                         mutex_lock(&kvm->slots_lock);
 955                         kvm_ioapic_destroy(kvm);
 956                         mutex_unlock(&kvm->slots_lock);
 957                         goto out;
 958                 }
 959                 break;
 960         case KVM_IRQ_LINE_STATUS:
 961         case KVM_IRQ_LINE: {
 962                 struct kvm_irq_level irq_event;
 963
 964                 r = -EFAULT;
 965                 if (copy_from_user(&irq_event, argp, sizeof irq_event))
 966                         goto out;
 967                 r = -ENXIO;
 968                 if (irqchip_in_kernel(kvm)) {
 969                         __s32 status;
 970                         status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
 971                                     irq_event.irq, irq_event.level);
 972                         if (ioctl == KVM_IRQ_LINE_STATUS) {
 973                                 r = -EFAULT;
 974                                 irq_event.status = status;
 975                                 if (copy_to_user(argp, &irq_event,
 976                                                         sizeof irq_event))
 977                                         goto out;
 978                         }
 979                         r = 0;
 980                 }
 981                 break;
 982                 }
 983         case KVM_GET_IRQCHIP: {
 984                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
 985                 struct kvm_irqchip chip;
 986
 987                 r = -EFAULT;
 988                 if (copy_from_user(&chip, argp, sizeof chip))
 989                                 goto out;
 990                 r = -ENXIO;
 991                 if (!irqchip_in_kernel(kvm))
 992                         goto out;
 993                 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
 994                 if (r)
 995                         goto out;
 996                 r = -EFAULT;
 997                 if (copy_to_user(argp, &chip, sizeof chip))
 998                                 goto out;
 999                 r = 0;
1000                 break;
1001                 }
1002         case KVM_SET_IRQCHIP: {
1003                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1004                 struct kvm_irqchip chip;
1005
1006                 r = -EFAULT;
1007                 if (copy_from_user(&chip, argp, sizeof chip))
1008                                 goto out;
1009                 r = -ENXIO;
1010                 if (!irqchip_in_kernel(kvm))
1011                         goto out;
1012                 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1013                 if (r)
1014                         goto out;
1015                 r = 0;
1016                 break;
1017                 }
1018         default:
1019                 ;
1020         }
1021 out:
1022         return r;
1023 }
1024
1025 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1026                 struct kvm_sregs *sregs)
1027 {
1028         return -EINVAL;
1029 }
1030
1031 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1032                 struct kvm_sregs *sregs)
1033 {
1034         return -EINVAL;
1035
1036 }
1037 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1038                 struct kvm_translation *tr)
1039 {
1040
1041         return -EINVAL;
1042 }
1043
1044 static int kvm_alloc_vmm_area(void)
1045 {
1046         if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1047                 kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1048                                 get_order(KVM_VMM_SIZE));
1049                 if (!kvm_vmm_base)
1050                         return -ENOMEM;
1051
1052                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1053                 kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1054
1055                 printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1056                                 kvm_vmm_base, kvm_vm_buffer);
1057         }
1058
1059         return 0;
1060 }
1061
1062 static void kvm_free_vmm_area(void)
1063 {
1064         if (kvm_vmm_base) {
1065                 /*Zero this area before free to avoid bits leak!!*/
1066                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1067                 free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1068                 kvm_vmm_base  = 0;
1069                 kvm_vm_buffer = 0;
1070                 kvm_vsa_base = 0;
1071         }
1072 }
1073
1074 static int vti_init_vpd(struct kvm_vcpu *vcpu)
1075 {
1076         int i;
1077         union cpuid3_t cpuid3;
1078         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1079
1080         if (IS_ERR(vpd))
1081                 return PTR_ERR(vpd);
1082
1083         /* CPUID init */
1084         for (i = 0; i < 5; i++)
1085                 vpd->vcpuid[i] = ia64_get_cpuid(i);
1086
1087         /* Limit the CPUID number to 5 */
1088         cpuid3.value = vpd->vcpuid[3];
1089         cpuid3.number = 4;      /* 5 - 1 */
1090         vpd->vcpuid[3] = cpuid3.value;
1091
1092         /*Set vac and vdc fields*/
1093         vpd->vac.a_from_int_cr = 1;
1094         vpd->vac.a_to_int_cr = 1;
1095         vpd->vac.a_from_psr = 1;
1096         vpd->vac.a_from_cpuid = 1;
1097         vpd->vac.a_cover = 1;
1098         vpd->vac.a_bsw = 1;
1099         vpd->vac.a_int = 1;
1100         vpd->vdc.d_vmsw = 1;
1101
1102         /*Set virtual buffer*/
1103         vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
1104
1105         return 0;
1106 }
1107
1108 static int vti_create_vp(struct kvm_vcpu *vcpu)
1109 {
1110         long ret;
1111         struct vpd *vpd = vcpu->arch.vpd;
1112         unsigned long  vmm_ivt;
1113
1114         vmm_ivt = kvm_vmm_info->vmm_ivt;
1115
1116         printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
1117
1118         ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
1119
1120         if (ret) {
1121                 printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
1122                 return -EINVAL;
1123         }
1124         return 0;
1125 }
1126
1127 static void init_ptce_info(struct kvm_vcpu *vcpu)
1128 {
1129         ia64_ptce_info_t ptce = {0};
1130
1131         ia64_get_ptce(&ptce);
1132         vcpu->arch.ptce_base = ptce.base;
1133         vcpu->arch.ptce_count[0] = ptce.count[0];
1134         vcpu->arch.ptce_count[1] = ptce.count[1];
1135         vcpu->arch.ptce_stride[0] = ptce.stride[0];
1136         vcpu->arch.ptce_stride[1] = ptce.stride[1];
1137 }
1138
1139 static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
1140 {
1141         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
1142
1143         if (hrtimer_cancel(p_ht))
1144                 hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
1145 }
1146
1147 static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
1148 {
1149         struct kvm_vcpu *vcpu;
1150         wait_queue_head_t *q;
1151
1152         vcpu  = container_of(data, struct kvm_vcpu, arch.hlt_timer);
1153         q = &vcpu->wq;
1154
1155         if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
1156                 goto out;
1157
1158         if (waitqueue_active(q))
1159                 wake_up_interruptible(q);
1160
1161 out:
1162         vcpu->arch.timer_fired = 1;
1163         vcpu->arch.timer_check = 1;
1164         return HRTIMER_NORESTART;
1165 }
1166
1167 #define PALE_RESET_ENTRY    0x80000000ffffffb0UL
1168
1169 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1170 {
1171         struct kvm_vcpu *v;
1172         int r;
1173         int i;
1174         long itc_offset;
1175         struct kvm *kvm = vcpu->kvm;
1176         struct kvm_pt_regs *regs = vcpu_regs(vcpu);
1177
1178         union context *p_ctx = &vcpu->arch.guest;
1179         struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
1180
1181         /*Init vcpu context for first run.*/
1182         if (IS_ERR(vmm_vcpu))
1183                 return PTR_ERR(vmm_vcpu);
1184
1185         if (kvm_vcpu_is_bsp(vcpu)) {
1186                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1187
1188                 /*Set entry address for first run.*/
1189                 regs->cr_iip = PALE_RESET_ENTRY;
1190
1191                 /*Initialize itc offset for vcpus*/
1192                 itc_offset = 0UL - kvm_get_itc(vcpu);
1193                 for (i = 0; i < KVM_MAX_VCPUS; i++) {
1194                         v = (struct kvm_vcpu *)((char *)vcpu +
1195                                         sizeof(struct kvm_vcpu_data) * i);
1196                         v->arch.itc_offset = itc_offset;
1197                         v->arch.last_itc = 0;
1198                 }
1199         } else
1200                 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
1201
1202         r = -ENOMEM;
1203         vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
1204         if (!vcpu->arch.apic)
1205                 goto out;
1206         vcpu->arch.apic->vcpu = vcpu;
1207
1208         p_ctx->gr[1] = 0;
1209         p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + KVM_STK_OFFSET);
1210         p_ctx->gr[13] = (unsigned long)vmm_vcpu;
1211         p_ctx->psr = 0x1008522000UL;
1212         p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
1213         p_ctx->caller_unat = 0;
1214         p_ctx->pr = 0x0;
1215         p_ctx->ar[36] = 0x0; /*unat*/
1216         p_ctx->ar[19] = 0x0; /*rnat*/
1217         p_ctx->ar[18] = (unsigned long)vmm_vcpu +
1218                                 ((sizeof(struct kvm_vcpu)+15) & ~15);
1219         p_ctx->ar[64] = 0x0; /*pfs*/
1220         p_ctx->cr[0] = 0x7e04UL;
1221         p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
1222         p_ctx->cr[8] = 0x3c;
1223
1224         /*Initialize region register*/
1225         p_ctx->rr[0] = 0x30;
1226         p_ctx->rr[1] = 0x30;
1227         p_ctx->rr[2] = 0x30;
1228         p_ctx->rr[3] = 0x30;
1229         p_ctx->rr[4] = 0x30;
1230         p_ctx->rr[5] = 0x30;
1231         p_ctx->rr[7] = 0x30;
1232
1233         /*Initialize branch register 0*/
1234         p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
1235
1236         vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
1237         vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
1238         vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
1239
1240         hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
1241         vcpu->arch.hlt_timer.function = hlt_timer_fn;
1242
1243         vcpu->arch.last_run_cpu = -1;
1244         vcpu->arch.vpd = (struct vpd *)VPD_BASE(vcpu->vcpu_id);
1245         vcpu->arch.vsa_base = kvm_vsa_base;
1246         vcpu->arch.__gp = kvm_vmm_gp;
1247         vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
1248         vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_BASE(vcpu->vcpu_id);
1249         vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(vcpu->vcpu_id);
1250         init_ptce_info(vcpu);
1251
1252         r = 0;
1253 out:
1254         return r;
1255 }
1256
1257 static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
1258 {
1259         unsigned long psr;
1260         int r;
1261
1262         local_irq_save(psr);
1263         r = kvm_insert_vmm_mapping(vcpu);
1264         local_irq_restore(psr);
1265         if (r)
1266                 goto fail;
1267         r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1268         if (r)
1269                 goto fail;
1270
1271         r = vti_init_vpd(vcpu);
1272         if (r) {
1273                 printk(KERN_DEBUG"kvm: vpd init error!!\n");
1274                 goto uninit;
1275         }
1276
1277         r = vti_create_vp(vcpu);
1278         if (r)
1279                 goto uninit;
1280
1281         kvm_purge_vmm_mapping(vcpu);
1282
1283         return 0;
1284 uninit:
1285         kvm_vcpu_uninit(vcpu);
1286 fail:
1287         return r;
1288 }
1289
1290 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1291                 unsigned int id)
1292 {
1293         struct kvm_vcpu *vcpu;
1294         unsigned long vm_base = kvm->arch.vm_base;
1295         int r;
1296         int cpu;
1297
1298         BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
1299
1300         r = -EINVAL;
1301         if (id >= KVM_MAX_VCPUS) {
1302                 printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
1303                                 KVM_MAX_VCPUS);
1304                 goto fail;
1305         }
1306
1307         r = -ENOMEM;
1308         if (!vm_base) {
1309                 printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1310                 goto fail;
1311         }
1312         vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
1313                                         vcpu_data[id].vcpu_struct));
1314         vcpu->kvm = kvm;
1315
1316         cpu = get_cpu();
1317         r = vti_vcpu_setup(vcpu, id);
1318         put_cpu();
1319
1320         if (r) {
1321                 printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1322                 goto fail;
1323         }
1324
1325         return vcpu;
1326 fail:
1327         return ERR_PTR(r);
1328 }
1329
1330 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1331 {
1332         return 0;
1333 }
1334
1335 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1336 {
1337         return -EINVAL;
1338 }
1339
1340 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1341 {
1342         return -EINVAL;
1343 }
1344
1345 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1346                                         struct kvm_guest_debug *dbg)
1347 {
1348         return -EINVAL;
1349 }
1350
1351 void kvm_arch_free_vm(struct kvm *kvm)
1352 {
1353         unsigned long vm_base = kvm->arch.vm_base;
1354
1355         if (vm_base) {
1356                 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1357                 free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1358         }
1359
1360 }
1361
1362 static void kvm_release_vm_pages(struct kvm *kvm)
1363 {
1364         struct kvm_memslots *slots;
1365         struct kvm_memory_slot *memslot;
1366         int i, j;
1367         unsigned long base_gfn;
1368
1369         slots = kvm_memslots(kvm);
1370         for (i = 0; i < slots->nmemslots; i++) {
1371                 memslot = &slots->memslots[i];
1372                 base_gfn = memslot->base_gfn;
1373
1374                 for (j = 0; j < memslot->npages; j++) {
1375                         if (memslot->rmap[j])
1376                                 put_page((struct page *)memslot->rmap[j]);
1377                 }
1378         }
1379 }
1380
1381 void kvm_arch_sync_events(struct kvm *kvm)
1382 {
1383 }
1384
1385 void kvm_arch_destroy_vm(struct kvm *kvm)
1386 {
1387         kvm_iommu_unmap_guest(kvm);
1388 #ifdef  KVM_CAP_DEVICE_ASSIGNMENT
1389         kvm_free_all_assigned_devices(kvm);
1390 #endif
1391         kfree(kvm->arch.vioapic);
1392         kvm_release_vm_pages(kvm);
1393 }
1394
1395 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1396 {
1397 }
1398
1399 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1400 {
1401         if (cpu != vcpu->cpu) {
1402                 vcpu->cpu = cpu;
1403                 if (vcpu->arch.ht_active)
1404                         kvm_migrate_hlt_timer(vcpu);
1405         }
1406 }
1407
1408 #define SAVE_REGS(_x)   regs->_x = vcpu->arch._x
1409
1410 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1411 {
1412         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1413         int i;
1414
1415         vcpu_load(vcpu);
1416
1417         for (i = 0; i < 16; i++) {
1418                 regs->vpd.vgr[i] = vpd->vgr[i];
1419                 regs->vpd.vbgr[i] = vpd->vbgr[i];
1420         }
1421         for (i = 0; i < 128; i++)
1422                 regs->vpd.vcr[i] = vpd->vcr[i];
1423         regs->vpd.vhpi = vpd->vhpi;
1424         regs->vpd.vnat = vpd->vnat;
1425         regs->vpd.vbnat = vpd->vbnat;
1426         regs->vpd.vpsr = vpd->vpsr;
1427         regs->vpd.vpr = vpd->vpr;
1428
1429         memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
1430
1431         SAVE_REGS(mp_state);
1432         SAVE_REGS(vmm_rr);
1433         memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1434         memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1435         SAVE_REGS(itr_regions);
1436         SAVE_REGS(dtr_regions);
1437         SAVE_REGS(tc_regions);
1438         SAVE_REGS(irq_check);
1439         SAVE_REGS(itc_check);
1440         SAVE_REGS(timer_check);
1441         SAVE_REGS(timer_pending);
1442         SAVE_REGS(last_itc);
1443         for (i = 0; i < 8; i++) {
1444                 regs->vrr[i] = vcpu->arch.vrr[i];
1445                 regs->ibr[i] = vcpu->arch.ibr[i];
1446                 regs->dbr[i] = vcpu->arch.dbr[i];
1447         }
1448         for (i = 0; i < 4; i++)
1449                 regs->insvc[i] = vcpu->arch.insvc[i];
1450         regs->saved_itc = vcpu->arch.itc_offset + kvm_get_itc(vcpu);
1451         SAVE_REGS(xtp);
1452         SAVE_REGS(metaphysical_rr0);
1453         SAVE_REGS(metaphysical_rr4);
1454         SAVE_REGS(metaphysical_saved_rr0);
1455         SAVE_REGS(metaphysical_saved_rr4);
1456         SAVE_REGS(fp_psr);
1457         SAVE_REGS(saved_gp);
1458
1459         vcpu_put(vcpu);
1460         return 0;
1461 }
1462
1463 int kvm_arch_vcpu_ioctl_get_stack(struct kvm_vcpu *vcpu,
1464                                   struct kvm_ia64_vcpu_stack *stack)
1465 {
1466         memcpy(stack, vcpu, sizeof(struct kvm_ia64_vcpu_stack));
1467         return 0;
1468 }
1469
1470 int kvm_arch_vcpu_ioctl_set_stack(struct kvm_vcpu *vcpu,
1471                                   struct kvm_ia64_vcpu_stack *stack)
1472 {
1473         memcpy(vcpu + 1, &stack->stack[0] + sizeof(struct kvm_vcpu),
1474                sizeof(struct kvm_ia64_vcpu_stack) - sizeof(struct kvm_vcpu));
1475
1476         vcpu->arch.exit_data = ((struct kvm_vcpu *)stack)->arch.exit_data;
1477         return 0;
1478 }
1479
1480 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1481 {
1482
1483         hrtimer_cancel(&vcpu->arch.hlt_timer);
1484         kfree(vcpu->arch.apic);
1485 }
1486
1487
1488 long kvm_arch_vcpu_ioctl(struct file *filp,
1489                          unsigned int ioctl, unsigned long arg)
1490 {
1491         struct kvm_vcpu *vcpu = filp->private_data;
1492         void __user *argp = (void __user *)arg;
1493         struct kvm_ia64_vcpu_stack *stack = NULL;
1494         long r;
1495
1496         switch (ioctl) {
1497         case KVM_IA64_VCPU_GET_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_WRITE, user_stack,
1506                                sizeof(struct kvm_ia64_vcpu_stack))) {
1507                         printk(KERN_INFO "KVM_IA64_VCPU_GET_STACK: "
1508                                "Illegal user destination address for stack\n");
1509                         goto out;
1510                 }
1511                 stack = kzalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1512                 if (!stack) {
1513                         r = -ENOMEM;
1514                         goto out;
1515                 }
1516
1517                 r = kvm_arch_vcpu_ioctl_get_stack(vcpu, stack);
1518                 if (r)
1519                         goto out;
1520
1521                 if (copy_to_user(user_stack, stack,
1522                                  sizeof(struct kvm_ia64_vcpu_stack))) {
1523                         r = -EFAULT;
1524                         goto out;
1525                 }
1526
1527                 break;
1528         }
1529         case KVM_IA64_VCPU_SET_STACK: {
1530                 struct kvm_ia64_vcpu_stack __user *user_stack;
1531                 void __user *first_p = argp;
1532
1533                 r = -EFAULT;
1534                 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1535                         goto out;
1536
1537                 if (!access_ok(VERIFY_READ, user_stack,
1538                             sizeof(struct kvm_ia64_vcpu_stack))) {
1539                         printk(KERN_INFO "KVM_IA64_VCPU_SET_STACK: "
1540                                "Illegal user address for stack\n");
1541                         goto out;
1542                 }
1543                 stack = kmalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1544                 if (!stack) {
1545                         r = -ENOMEM;
1546                         goto out;
1547                 }
1548                 if (copy_from_user(stack, user_stack,
1549                                    sizeof(struct kvm_ia64_vcpu_stack)))
1550                         goto out;
1551
1552                 r = kvm_arch_vcpu_ioctl_set_stack(vcpu, stack);
1553                 break;
1554         }
1555
1556         default:
1557                 r = -EINVAL;
1558         }
1559
1560 out:
1561         kfree(stack);
1562         return r;
1563 }
1564
1565 int kvm_arch_prepare_memory_region(struct kvm *kvm,
1566                 struct kvm_memory_slot *memslot,
1567                 struct kvm_memory_slot old,
1568                 struct kvm_userspace_memory_region *mem,
1569                 int user_alloc)
1570 {
1571         unsigned long i;
1572         unsigned long pfn;
1573         int npages = memslot->npages;
1574         unsigned long base_gfn = memslot->base_gfn;
1575
1576         if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
1577                 return -ENOMEM;
1578
1579         for (i = 0; i < npages; i++) {
1580                 pfn = gfn_to_pfn(kvm, base_gfn + i);
1581                 if (!kvm_is_mmio_pfn(pfn)) {
1582                         kvm_set_pmt_entry(kvm, base_gfn + i,
1583                                         pfn << PAGE_SHIFT,
1584                                 _PAGE_AR_RWX | _PAGE_MA_WB);
1585                         memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1586                 } else {
1587                         kvm_set_pmt_entry(kvm, base_gfn + i,
1588                                         GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1589                                         _PAGE_MA_UC);
1590                         memslot->rmap[i] = 0;
1591                         }
1592         }
1593
1594         return 0;
1595 }
1596
1597 void kvm_arch_commit_memory_region(struct kvm *kvm,
1598                 struct kvm_userspace_memory_region *mem,
1599                 struct kvm_memory_slot old,
1600                 int user_alloc)
1601 {
1602         return;
1603 }
1604
1605 void kvm_arch_flush_shadow(struct kvm *kvm)
1606 {
1607         kvm_flush_remote_tlbs(kvm);
1608 }
1609
1610 long kvm_arch_dev_ioctl(struct file *filp,
1611                         unsigned int ioctl, unsigned long arg)
1612 {
1613         return -EINVAL;
1614 }
1615
1616 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1617 {
1618         kvm_vcpu_uninit(vcpu);
1619 }
1620
1621 static int vti_cpu_has_kvm_support(void)
1622 {
1623         long  avail = 1, status = 1, control = 1;
1624         long ret;
1625
1626         ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1627         if (ret)
1628                 goto out;
1629
1630         if (!(avail & PAL_PROC_VM_BIT))
1631                 goto out;
1632
1633         printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1634
1635         ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1636         if (ret)
1637                 goto out;
1638         printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1639
1640         if (!(vp_env_info & VP_OPCODE)) {
1641                 printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1642                                 "vm_env_info:0x%lx\n", vp_env_info);
1643         }
1644
1645         return 1;
1646 out:
1647         return 0;
1648 }
1649
1650
1651 /*
1652  * On SN2, the ITC isn't stable, so copy in fast path code to use the
1653  * SN2 RTC, replacing the ITC based default verion.
1654  */
1655 static void kvm_patch_vmm(struct kvm_vmm_info *vmm_info,
1656                           struct module *module)
1657 {
1658         unsigned long new_ar, new_ar_sn2;
1659         unsigned long module_base;
1660
1661         if (!ia64_platform_is("sn2"))
1662                 return;
1663
1664         module_base = (unsigned long)module->module_core;
1665
1666         new_ar = kvm_vmm_base + vmm_info->patch_mov_ar - module_base;
1667         new_ar_sn2 = kvm_vmm_base + vmm_info->patch_mov_ar_sn2 - module_base;
1668
1669         printk(KERN_INFO "kvm: Patching ITC emulation to use SGI SN2 RTC "
1670                "as source\n");
1671
1672         /*
1673          * Copy the SN2 version of mov_ar into place. They are both
1674          * the same size, so 6 bundles is sufficient (6 * 0x10).
1675          */
1676         memcpy((void *)new_ar, (void *)new_ar_sn2, 0x60);
1677 }
1678
1679 static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1680                             struct module *module)
1681 {
1682         unsigned long module_base;
1683         unsigned long vmm_size;
1684
1685         unsigned long vmm_offset, func_offset, fdesc_offset;
1686         struct fdesc *p_fdesc;
1687
1688         BUG_ON(!module);
1689
1690         if (!kvm_vmm_base) {
1691                 printk("kvm: kvm area hasn't been initialized yet!!\n");
1692                 return -EFAULT;
1693         }
1694
1695         /*Calculate new position of relocated vmm module.*/
1696         module_base = (unsigned long)module->module_core;
1697         vmm_size = module->core_size;
1698         if (unlikely(vmm_size > KVM_VMM_SIZE))
1699                 return -EFAULT;
1700
1701         memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1702         kvm_patch_vmm(vmm_info, module);
1703         kvm_flush_icache(kvm_vmm_base, vmm_size);
1704
1705         /*Recalculate kvm_vmm_info based on new VMM*/
1706         vmm_offset = vmm_info->vmm_ivt - module_base;
1707         kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1708         printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1709                         kvm_vmm_info->vmm_ivt);
1710
1711         fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1712         kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1713                                                         fdesc_offset);
1714         func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1715         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1716         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1717         p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1718
1719         printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1720                         KVM_VMM_BASE+func_offset);
1721
1722         fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1723         kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1724                         fdesc_offset);
1725         func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1726         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1727         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1728         p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1729
1730         kvm_vmm_gp = p_fdesc->gp;
1731
1732         printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1733                                                 kvm_vmm_info->vmm_entry);
1734         printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1735                                                 KVM_VMM_BASE + func_offset);
1736
1737         return 0;
1738 }
1739
1740 int kvm_arch_init(void *opaque)
1741 {
1742         int r;
1743         struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1744
1745         if (!vti_cpu_has_kvm_support()) {
1746                 printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1747                 r = -EOPNOTSUPP;
1748                 goto out;
1749         }
1750
1751         if (kvm_vmm_info) {
1752                 printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1753                 r = -EEXIST;
1754                 goto out;
1755         }
1756
1757         r = -ENOMEM;
1758         kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1759         if (!kvm_vmm_info)
1760                 goto out;
1761
1762         if (kvm_alloc_vmm_area())
1763                 goto out_free0;
1764
1765         r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1766         if (r)
1767                 goto out_free1;
1768
1769         return 0;
1770
1771 out_free1:
1772         kvm_free_vmm_area();
1773 out_free0:
1774         kfree(kvm_vmm_info);
1775 out:
1776         return r;
1777 }
1778
1779 void kvm_arch_exit(void)
1780 {
1781         kvm_free_vmm_area();
1782         kfree(kvm_vmm_info);
1783         kvm_vmm_info = NULL;
1784 }
1785
1786 static void kvm_ia64_sync_dirty_log(struct kvm *kvm,
1787                                     struct kvm_memory_slot *memslot)
1788 {
1789         int i;
1790         long base;
1791         unsigned long n;
1792         unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
1793                         offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
1794
1795         n = kvm_dirty_bitmap_bytes(memslot);
1796         base = memslot->base_gfn / BITS_PER_LONG;
1797
1798         spin_lock(&kvm->arch.dirty_log_lock);
1799         for (i = 0; i < n/sizeof(long); ++i) {
1800                 memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1801                 dirty_bitmap[base + i] = 0;
1802         }
1803         spin_unlock(&kvm->arch.dirty_log_lock);
1804 }
1805
1806 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1807                 struct kvm_dirty_log *log)
1808 {
1809         int r;
1810         unsigned long n;
1811         struct kvm_memory_slot *memslot;
1812         int is_dirty = 0;
1813
1814         mutex_lock(&kvm->slots_lock);
1815
1816         r = -EINVAL;
1817         if (log->slot >= KVM_MEMORY_SLOTS)
1818                 goto out;
1819
1820         memslot = &kvm->memslots->memslots[log->slot];
1821         r = -ENOENT;
1822         if (!memslot->dirty_bitmap)
1823                 goto out;
1824
1825         kvm_ia64_sync_dirty_log(kvm, memslot);
1826         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1827         if (r)
1828                 goto out;
1829
1830         /* If nothing is dirty, don't bother messing with page tables. */
1831         if (is_dirty) {
1832                 kvm_flush_remote_tlbs(kvm);
1833                 n = kvm_dirty_bitmap_bytes(memslot);
1834                 memset(memslot->dirty_bitmap, 0, n);
1835         }
1836         r = 0;
1837 out:
1838         mutex_unlock(&kvm->slots_lock);
1839         return r;
1840 }
1841
1842 int kvm_arch_hardware_setup(void)
1843 {
1844         return 0;
1845 }
1846
1847 void kvm_arch_hardware_unsetup(void)
1848 {
1849 }
1850
1851 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
1852 {
1853         int me;
1854         int cpu = vcpu->cpu;
1855
1856         if (waitqueue_active(&vcpu->wq))
1857                 wake_up_interruptible(&vcpu->wq);
1858
1859         me = get_cpu();
1860         if (cpu != me && (unsigned) cpu < nr_cpu_ids && cpu_online(cpu))
1861                 if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests))
1862                         smp_send_reschedule(cpu);
1863         put_cpu();
1864 }
1865
1866 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)
1867 {
1868         return __apic_accept_irq(vcpu, irq->vector);
1869 }
1870
1871 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1872 {
1873         return apic->vcpu->vcpu_id == dest;
1874 }
1875
1876 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1877 {
1878         return 0;
1879 }
1880
1881 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
1882 {
1883         return vcpu1->arch.xtp - vcpu2->arch.xtp;
1884 }
1885
1886 int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
1887                 int short_hand, int dest, int dest_mode)
1888 {
1889         struct kvm_lapic *target = vcpu->arch.apic;
1890         return (dest_mode == 0) ?
1891                 kvm_apic_match_physical_addr(target, dest) :
1892                 kvm_apic_match_logical_addr(target, dest);
1893 }
1894
1895 static int find_highest_bits(int *dat)
1896 {
1897         u32  bits, bitnum;
1898         int i;
1899
1900         /* loop for all 256 bits */
1901         for (i = 7; i >= 0 ; i--) {
1902                 bits = dat[i];
1903                 if (bits) {
1904                         bitnum = fls(bits);
1905                         return i * 32 + bitnum - 1;
1906                 }
1907         }
1908
1909         return -1;
1910 }
1911
1912 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1913 {
1914     struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1915
1916     if (vpd->irr[0] & (1UL << NMI_VECTOR))
1917                 return NMI_VECTOR;
1918     if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1919                 return ExtINT_VECTOR;
1920
1921     return find_highest_bits((int *)&vpd->irr[0]);
1922 }
1923
1924 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1925 {
1926         return vcpu->arch.timer_fired;
1927 }
1928
1929 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1930 {
1931         return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) ||
1932                 (kvm_highest_pending_irq(vcpu) != -1);
1933 }
1934
1935 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1936                                     struct kvm_mp_state *mp_state)
1937 {
1938         mp_state->mp_state = vcpu->arch.mp_state;
1939         return 0;
1940 }
1941
1942 static int vcpu_reset(struct kvm_vcpu *vcpu)
1943 {
1944         int r;
1945         long psr;
1946         local_irq_save(psr);
1947         r = kvm_insert_vmm_mapping(vcpu);
1948         local_irq_restore(psr);
1949         if (r)
1950                 goto fail;
1951
1952         vcpu->arch.launched = 0;
1953         kvm_arch_vcpu_uninit(vcpu);
1954         r = kvm_arch_vcpu_init(vcpu);
1955         if (r)
1956                 goto fail;
1957
1958         kvm_purge_vmm_mapping(vcpu);
1959         r = 0;
1960 fail:
1961         return r;
1962 }
1963
1964 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1965                                     struct kvm_mp_state *mp_state)
1966 {
1967         int r = 0;
1968
1969         vcpu->arch.mp_state = mp_state->mp_state;
1970         if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
1971                 r = vcpu_reset(vcpu);
1972         return r;
1973 }