SAFE public projects git trees. - safe/jmp/linux-2.6/blob - arch/ia64/kvm/kvm-ia64.c

   1 /*
   2  * kvm_ia64.c: Basic KVM suppport On Itanium series processors
   3  *
   4  *
   5  *      Copyright (C) 2007, Intel Corporation.
   6  *      Xiantao Zhang  (xiantao.zhang@intel.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms and conditions of the GNU General Public License,
  10  * version 2, as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  19  * Place - Suite 330, Boston, MA 02111-1307 USA.
  20  *
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/errno.h>
  25 #include <linux/percpu.h>
  26 #include <linux/gfp.h>
  27 #include <linux/fs.h>
  28 #include <linux/smp.h>
  29 #include <linux/kvm_host.h>
  30 #include <linux/kvm.h>
  31 #include <linux/bitops.h>
  32 #include <linux/hrtimer.h>
  33 #include <linux/uaccess.h>
  34 #include <linux/iommu.h>
  35 #include <linux/intel-iommu.h>
  36
  37 #include <asm/pgtable.h>
  38 #include <asm/gcc_intrin.h>
  39 #include <asm/pal.h>
  40 #include <asm/cacheflush.h>
  41 #include <asm/div64.h>
  42 #include <asm/tlb.h>
  43 #include <asm/elf.h>
  44 #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 void 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;
 141
 142         spin_lock(&vp_lock);
 143         status = ia64_pal_vp_init_env(kvm_vsa_base ?
 144                                 VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
 145                         __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
 146         if (status != 0) {
 147                 printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
 148                 return ;
 149         }
 150
 151         if (!kvm_vsa_base) {
 152                 kvm_vsa_base = tmp_base;
 153                 printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
 154         }
 155         spin_unlock(&vp_lock);
 156         ia64_ptr_entry(0x3, slot);
 157 }
 158
 159 void kvm_arch_hardware_disable(void *garbage)
 160 {
 161
 162         long status;
 163         int slot;
 164         unsigned long pte;
 165         unsigned long saved_psr;
 166         unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
 167
 168         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
 169                                 PAGE_KERNEL));
 170
 171         local_irq_save(saved_psr);
 172         slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 173         local_irq_restore(saved_psr);
 174         if (slot < 0)
 175                 return;
 176
 177         status = ia64_pal_vp_exit_env(host_iva);
 178         if (status)
 179                 printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
 180                                 status);
 181         ia64_ptr_entry(0x3, slot);
 182 }
 183
 184 void kvm_arch_check_processor_compat(void *rtn)
 185 {
 186         *(int *)rtn = 0;
 187 }
 188
 189 int kvm_dev_ioctl_check_extension(long ext)
 190 {
 191
 192         int r;
 193
 194         switch (ext) {
 195         case KVM_CAP_IRQCHIP:
 196         case KVM_CAP_MP_STATE:
 197         case KVM_CAP_IRQ_INJECT_STATUS:
 198                 r = 1;
 199                 break;
 200         case KVM_CAP_COALESCED_MMIO:
 201                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 202                 break;
 203         case KVM_CAP_IOMMU:
 204                 r = iommu_found();
 205                 break;
 206         default:
 207                 r = 0;
 208         }
 209         return r;
 210
 211 }
 212
 213 static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
 214                                         gpa_t addr, int len, int is_write)
 215 {
 216         struct kvm_io_device *dev;
 217
 218         dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, is_write);
 219
 220         return dev;
 221 }
 222
 223 static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 224 {
 225         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 226         kvm_run->hw.hardware_exit_reason = 1;
 227         return 0;
 228 }
 229
 230 static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 231 {
 232         struct kvm_mmio_req *p;
 233         struct kvm_io_device *mmio_dev;
 234
 235         p = kvm_get_vcpu_ioreq(vcpu);
 236
 237         if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS)
 238                 goto mmio;
 239         vcpu->mmio_needed = 1;
 240         vcpu->mmio_phys_addr = kvm_run->mmio.phys_addr = p->addr;
 241         vcpu->mmio_size = kvm_run->mmio.len = p->size;
 242         vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir;
 243
 244         if (vcpu->mmio_is_write)
 245                 memcpy(vcpu->mmio_data, &p->data, p->size);
 246         memcpy(kvm_run->mmio.data, &p->data, p->size);
 247         kvm_run->exit_reason = KVM_EXIT_MMIO;
 248         return 0;
 249 mmio:
 250         mmio_dev = vcpu_find_mmio_dev(vcpu, p->addr, p->size, !p->dir);
 251         if (mmio_dev) {
 252                 if (!p->dir)
 253                         kvm_iodevice_write(mmio_dev, p->addr, p->size,
 254                                                 &p->data);
 255                 else
 256                         kvm_iodevice_read(mmio_dev, p->addr, p->size,
 257                                                 &p->data);
 258
 259         } else
 260                 printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr);
 261         p->state = STATE_IORESP_READY;
 262
 263         return 1;
 264 }
 265
 266 static int handle_pal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 267 {
 268         struct exit_ctl_data *p;
 269
 270         p = kvm_get_exit_data(vcpu);
 271
 272         if (p->exit_reason == EXIT_REASON_PAL_CALL)
 273                 return kvm_pal_emul(vcpu, kvm_run);
 274         else {
 275                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 276                 kvm_run->hw.hardware_exit_reason = 2;
 277                 return 0;
 278         }
 279 }
 280
 281 static int handle_sal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 282 {
 283         struct exit_ctl_data *p;
 284
 285         p = kvm_get_exit_data(vcpu);
 286
 287         if (p->exit_reason == EXIT_REASON_SAL_CALL) {
 288                 kvm_sal_emul(vcpu);
 289                 return 1;
 290         } else {
 291                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 292                 kvm_run->hw.hardware_exit_reason = 3;
 293                 return 0;
 294         }
 295
 296 }
 297
 298 static int __apic_accept_irq(struct kvm_vcpu *vcpu, uint64_t vector)
 299 {
 300         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 301
 302         if (!test_and_set_bit(vector, &vpd->irr[0])) {
 303                 vcpu->arch.irq_new_pending = 1;
 304                 kvm_vcpu_kick(vcpu);
 305                 return 1;
 306         }
 307         return 0;
 308 }
 309
 310 /*
 311  *  offset: address offset to IPI space.
 312  *  value:  deliver value.
 313  */
 314 static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm,
 315                                 uint64_t vector)
 316 {
 317         switch (dm) {
 318         case SAPIC_FIXED:
 319                 break;
 320         case SAPIC_NMI:
 321                 vector = 2;
 322                 break;
 323         case SAPIC_EXTINT:
 324                 vector = 0;
 325                 break;
 326         case SAPIC_INIT:
 327         case SAPIC_PMI:
 328         default:
 329                 printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n");
 330                 return;
 331         }
 332         __apic_accept_irq(vcpu, vector);
 333 }
 334
 335 static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id,
 336                         unsigned long eid)
 337 {
 338         union ia64_lid lid;
 339         int i;
 340
 341         for (i = 0; i < kvm->arch.online_vcpus; i++) {
 342                 if (kvm->vcpus[i]) {
 343                         lid.val = VCPU_LID(kvm->vcpus[i]);
 344                         if (lid.id == id && lid.eid == eid)
 345                                 return kvm->vcpus[i];
 346                 }
 347         }
 348
 349         return NULL;
 350 }
 351
 352 static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 353 {
 354         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 355         struct kvm_vcpu *target_vcpu;
 356         struct kvm_pt_regs *regs;
 357         union ia64_ipi_a addr = p->u.ipi_data.addr;
 358         union ia64_ipi_d data = p->u.ipi_data.data;
 359
 360         target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid);
 361         if (!target_vcpu)
 362                 return handle_vm_error(vcpu, kvm_run);
 363
 364         if (!target_vcpu->arch.launched) {
 365                 regs = vcpu_regs(target_vcpu);
 366
 367                 regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip;
 368                 regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp;
 369
 370                 target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 371                 if (waitqueue_active(&target_vcpu->wq))
 372                         wake_up_interruptible(&target_vcpu->wq);
 373         } else {
 374                 vcpu_deliver_ipi(target_vcpu, data.dm, data.vector);
 375                 if (target_vcpu != vcpu)
 376                         kvm_vcpu_kick(target_vcpu);
 377         }
 378
 379         return 1;
 380 }
 381
 382 struct call_data {
 383         struct kvm_ptc_g ptc_g_data;
 384         struct kvm_vcpu *vcpu;
 385 };
 386
 387 static void vcpu_global_purge(void *info)
 388 {
 389         struct call_data *p = (struct call_data *)info;
 390         struct kvm_vcpu *vcpu = p->vcpu;
 391
 392         if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
 393                 return;
 394
 395         set_bit(KVM_REQ_PTC_G, &vcpu->requests);
 396         if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) {
 397                 vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] =
 398                                                         p->ptc_g_data;
 399         } else {
 400                 clear_bit(KVM_REQ_PTC_G, &vcpu->requests);
 401                 vcpu->arch.ptc_g_count = 0;
 402                 set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
 403         }
 404 }
 405
 406 static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 407 {
 408         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 409         struct kvm *kvm = vcpu->kvm;
 410         struct call_data call_data;
 411         int i;
 412
 413         call_data.ptc_g_data = p->u.ptc_g_data;
 414
 415         for (i = 0; i < kvm->arch.online_vcpus; i++) {
 416                 if (!kvm->vcpus[i] || kvm->vcpus[i]->arch.mp_state ==
 417                                                 KVM_MP_STATE_UNINITIALIZED ||
 418                                         vcpu == kvm->vcpus[i])
 419                         continue;
 420
 421                 if (waitqueue_active(&kvm->vcpus[i]->wq))
 422                         wake_up_interruptible(&kvm->vcpus[i]->wq);
 423
 424                 if (kvm->vcpus[i]->cpu != -1) {
 425                         call_data.vcpu = kvm->vcpus[i];
 426                         smp_call_function_single(kvm->vcpus[i]->cpu,
 427                                         vcpu_global_purge, &call_data, 1);
 428                 } else
 429                         printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
 430
 431         }
 432         return 1;
 433 }
 434
 435 static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 436 {
 437         return 1;
 438 }
 439
 440 static int kvm_sn2_setup_mappings(struct kvm_vcpu *vcpu)
 441 {
 442         unsigned long pte, rtc_phys_addr, map_addr;
 443         int slot;
 444
 445         map_addr = KVM_VMM_BASE + (1UL << KVM_VMM_SHIFT);
 446         rtc_phys_addr = LOCAL_MMR_OFFSET | SH_RTC;
 447         pte = pte_val(mk_pte_phys(rtc_phys_addr, PAGE_KERNEL_UC));
 448         slot = ia64_itr_entry(0x3, map_addr, pte, PAGE_SHIFT);
 449         vcpu->arch.sn_rtc_tr_slot = slot;
 450         if (slot < 0) {
 451                 printk(KERN_ERR "Mayday mayday! RTC mapping failed!\n");
 452                 slot = 0;
 453         }
 454         return slot;
 455 }
 456
 457 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
 458 {
 459
 460         ktime_t kt;
 461         long itc_diff;
 462         unsigned long vcpu_now_itc;
 463         unsigned long expires;
 464         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
 465         unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
 466         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 467
 468         if (irqchip_in_kernel(vcpu->kvm)) {
 469
 470                 vcpu_now_itc = kvm_get_itc(vcpu) + vcpu->arch.itc_offset;
 471
 472                 if (time_after(vcpu_now_itc, vpd->itm)) {
 473                         vcpu->arch.timer_check = 1;
 474                         return 1;
 475                 }
 476                 itc_diff = vpd->itm - vcpu_now_itc;
 477                 if (itc_diff < 0)
 478                         itc_diff = -itc_diff;
 479
 480                 expires = div64_u64(itc_diff, cyc_per_usec);
 481                 kt = ktime_set(0, 1000 * expires);
 482
 483                 vcpu->arch.ht_active = 1;
 484                 hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
 485
 486                 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
 487                 kvm_vcpu_block(vcpu);
 488                 hrtimer_cancel(p_ht);
 489                 vcpu->arch.ht_active = 0;
 490
 491                 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests) ||
 492                                 kvm_cpu_has_pending_timer(vcpu))
 493                         if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
 494                                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 495
 496                 if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
 497                         return -EINTR;
 498                 return 1;
 499         } else {
 500                 printk(KERN_ERR"kvm: Unsupported userspace halt!");
 501                 return 0;
 502         }
 503 }
 504
 505 static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
 506                 struct kvm_run *kvm_run)
 507 {
 508         kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
 509         return 0;
 510 }
 511
 512 static int handle_external_interrupt(struct kvm_vcpu *vcpu,
 513                 struct kvm_run *kvm_run)
 514 {
 515         return 1;
 516 }
 517
 518 static int handle_vcpu_debug(struct kvm_vcpu *vcpu,
 519                                 struct kvm_run *kvm_run)
 520 {
 521         printk("VMM: %s", vcpu->arch.log_buf);
 522         return 1;
 523 }
 524
 525 static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
 526                 struct kvm_run *kvm_run) = {
 527         [EXIT_REASON_VM_PANIC]              = handle_vm_error,
 528         [EXIT_REASON_MMIO_INSTRUCTION]      = handle_mmio,
 529         [EXIT_REASON_PAL_CALL]              = handle_pal_call,
 530         [EXIT_REASON_SAL_CALL]              = handle_sal_call,
 531         [EXIT_REASON_SWITCH_RR6]            = handle_switch_rr6,
 532         [EXIT_REASON_VM_DESTROY]            = handle_vm_shutdown,
 533         [EXIT_REASON_EXTERNAL_INTERRUPT]    = handle_external_interrupt,
 534         [EXIT_REASON_IPI]                   = handle_ipi,
 535         [EXIT_REASON_PTC_G]                 = handle_global_purge,
 536         [EXIT_REASON_DEBUG]                 = handle_vcpu_debug,
 537
 538 };
 539
 540 static const int kvm_vti_max_exit_handlers =
 541                 sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
 542
 543 static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
 544 {
 545         struct exit_ctl_data *p_exit_data;
 546
 547         p_exit_data = kvm_get_exit_data(vcpu);
 548         return p_exit_data->exit_reason;
 549 }
 550
 551 /*
 552  * The guest has exited.  See if we can fix it or if we need userspace
 553  * assistance.
 554  */
 555 static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 556 {
 557         u32 exit_reason = kvm_get_exit_reason(vcpu);
 558         vcpu->arch.last_exit = exit_reason;
 559
 560         if (exit_reason < kvm_vti_max_exit_handlers
 561                         && kvm_vti_exit_handlers[exit_reason])
 562                 return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
 563         else {
 564                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 565                 kvm_run->hw.hardware_exit_reason = exit_reason;
 566         }
 567         return 0;
 568 }
 569
 570 static inline void vti_set_rr6(unsigned long rr6)
 571 {
 572         ia64_set_rr(RR6, rr6);
 573         ia64_srlz_i();
 574 }
 575
 576 static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
 577 {
 578         unsigned long pte;
 579         struct kvm *kvm = vcpu->kvm;
 580         int r;
 581
 582         /*Insert a pair of tr to map vmm*/
 583         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
 584         r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 585         if (r < 0)
 586                 goto out;
 587         vcpu->arch.vmm_tr_slot = r;
 588         /*Insert a pairt of tr to map data of vm*/
 589         pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
 590         r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
 591                                         pte, KVM_VM_DATA_SHIFT);
 592         if (r < 0)
 593                 goto out;
 594         vcpu->arch.vm_tr_slot = r;
 595
 596 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 597         if (kvm->arch.is_sn2) {
 598                 r = kvm_sn2_setup_mappings(vcpu);
 599                 if (r < 0)
 600                         goto out;
 601         }
 602 #endif
 603
 604         r = 0;
 605 out:
 606         return r;
 607 }
 608
 609 static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
 610 {
 611         struct kvm *kvm = vcpu->kvm;
 612         ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
 613         ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
 614 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 615         if (kvm->arch.is_sn2)
 616                 ia64_ptr_entry(0x3, vcpu->arch.sn_rtc_tr_slot);
 617 #endif
 618 }
 619
 620 static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
 621 {
 622         int cpu = smp_processor_id();
 623
 624         if (vcpu->arch.last_run_cpu != cpu ||
 625                         per_cpu(last_vcpu, cpu) != vcpu) {
 626                 per_cpu(last_vcpu, cpu) = vcpu;
 627                 vcpu->arch.last_run_cpu = cpu;
 628                 kvm_flush_tlb_all();
 629         }
 630
 631         vcpu->arch.host_rr6 = ia64_get_rr(RR6);
 632         vti_set_rr6(vcpu->arch.vmm_rr);
 633         return kvm_insert_vmm_mapping(vcpu);
 634 }
 635 static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
 636 {
 637         kvm_purge_vmm_mapping(vcpu);
 638         vti_set_rr6(vcpu->arch.host_rr6);
 639 }
 640
 641 static int  vti_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 642 {
 643         union context *host_ctx, *guest_ctx;
 644         int r;
 645
 646         /*Get host and guest context with guest address space.*/
 647         host_ctx = kvm_get_host_context(vcpu);
 648         guest_ctx = kvm_get_guest_context(vcpu);
 649
 650         r = kvm_vcpu_pre_transition(vcpu);
 651         if (r < 0)
 652                 goto out;
 653         kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
 654         kvm_vcpu_post_transition(vcpu);
 655         r = 0;
 656 out:
 657         return r;
 658 }
 659
 660 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 661 {
 662         int r;
 663
 664 again:
 665         if (signal_pending(current)) {
 666                 r = -EINTR;
 667                 kvm_run->exit_reason = KVM_EXIT_INTR;
 668                 goto out;
 669         }
 670
 671         /*
 672          * down_read() may sleep and return with interrupts enabled
 673          */
 674         down_read(&vcpu->kvm->slots_lock);
 675
 676         preempt_disable();
 677         local_irq_disable();
 678
 679         vcpu->guest_mode = 1;
 680         kvm_guest_enter();
 681         r = vti_vcpu_run(vcpu, kvm_run);
 682         if (r < 0) {
 683                 local_irq_enable();
 684                 preempt_enable();
 685                 kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
 686                 goto out;
 687         }
 688
 689         vcpu->arch.launched = 1;
 690         vcpu->guest_mode = 0;
 691         local_irq_enable();
 692
 693         /*
 694          * We must have an instruction between local_irq_enable() and
 695          * kvm_guest_exit(), so the timer interrupt isn't delayed by
 696          * the interrupt shadow.  The stat.exits increment will do nicely.
 697          * But we need to prevent reordering, hence this barrier():
 698          */
 699         barrier();
 700         kvm_guest_exit();
 701         up_read(&vcpu->kvm->slots_lock);
 702         preempt_enable();
 703
 704         r = kvm_handle_exit(kvm_run, vcpu);
 705
 706         if (r > 0) {
 707                 if (!need_resched())
 708                         goto again;
 709         }
 710
 711 out:
 712         if (r > 0) {
 713                 kvm_resched(vcpu);
 714                 goto again;
 715         }
 716
 717         return r;
 718 }
 719
 720 static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
 721 {
 722         struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
 723
 724         if (!vcpu->mmio_is_write)
 725                 memcpy(&p->data, vcpu->mmio_data, 8);
 726         p->state = STATE_IORESP_READY;
 727 }
 728
 729 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 730 {
 731         int r;
 732         sigset_t sigsaved;
 733
 734         vcpu_load(vcpu);
 735
 736         if (vcpu->sigset_active)
 737                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 738
 739         if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
 740                 kvm_vcpu_block(vcpu);
 741                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 742                 r = -EAGAIN;
 743                 goto out;
 744         }
 745
 746         if (vcpu->mmio_needed) {
 747                 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
 748                 kvm_set_mmio_data(vcpu);
 749                 vcpu->mmio_read_completed = 1;
 750                 vcpu->mmio_needed = 0;
 751         }
 752         r = __vcpu_run(vcpu, kvm_run);
 753 out:
 754         if (vcpu->sigset_active)
 755                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 756
 757         vcpu_put(vcpu);
 758         return r;
 759 }
 760
 761 static struct kvm *kvm_alloc_kvm(void)
 762 {
 763
 764         struct kvm *kvm;
 765         uint64_t  vm_base;
 766
 767         BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
 768
 769         vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
 770
 771         if (!vm_base)
 772                 return ERR_PTR(-ENOMEM);
 773
 774         memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
 775         kvm = (struct kvm *)(vm_base +
 776                         offsetof(struct kvm_vm_data, kvm_vm_struct));
 777         kvm->arch.vm_base = vm_base;
 778         printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
 779
 780         return kvm;
 781 }
 782
 783 struct kvm_io_range {
 784         unsigned long start;
 785         unsigned long size;
 786         unsigned long type;
 787 };
 788
 789 static const struct kvm_io_range io_ranges[] = {
 790         {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
 791         {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
 792         {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
 793         {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
 794         {PIB_START, PIB_SIZE, GPFN_PIB},
 795 };
 796
 797 static void kvm_build_io_pmt(struct kvm *kvm)
 798 {
 799         unsigned long i, j;
 800
 801         /* Mark I/O ranges */
 802         for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
 803                                                         i++) {
 804                 for (j = io_ranges[i].start;
 805                                 j < io_ranges[i].start + io_ranges[i].size;
 806                                 j += PAGE_SIZE)
 807                         kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
 808                                         io_ranges[i].type, 0);
 809         }
 810
 811 }
 812
 813 /*Use unused rids to virtualize guest rid.*/
 814 #define GUEST_PHYSICAL_RR0      0x1739
 815 #define GUEST_PHYSICAL_RR4      0x2739
 816 #define VMM_INIT_RR             0x1660
 817
 818 static void kvm_init_vm(struct kvm *kvm)
 819 {
 820         BUG_ON(!kvm);
 821
 822         kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
 823         kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
 824         kvm->arch.vmm_init_rr = VMM_INIT_RR;
 825
 826         /*
 827          *Fill P2M entries for MMIO/IO ranges
 828          */
 829         kvm_build_io_pmt(kvm);
 830
 831         INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
 832
 833         /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
 834         set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
 835 }
 836
 837 struct  kvm *kvm_arch_create_vm(void)
 838 {
 839         struct kvm *kvm = kvm_alloc_kvm();
 840
 841         if (IS_ERR(kvm))
 842                 return ERR_PTR(-ENOMEM);
 843
 844         kvm->arch.is_sn2 = ia64_platform_is("sn2");
 845
 846         kvm_init_vm(kvm);
 847
 848         kvm->arch.online_vcpus = 0;
 849
 850         return kvm;
 851
 852 }
 853
 854 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
 855                                         struct kvm_irqchip *chip)
 856 {
 857         int r;
 858
 859         r = 0;
 860         switch (chip->chip_id) {
 861         case KVM_IRQCHIP_IOAPIC:
 862                 memcpy(&chip->chip.ioapic, ioapic_irqchip(kvm),
 863                                 sizeof(struct kvm_ioapic_state));
 864                 break;
 865         default:
 866                 r = -EINVAL;
 867                 break;
 868         }
 869         return r;
 870 }
 871
 872 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
 873 {
 874         int r;
 875
 876         r = 0;
 877         switch (chip->chip_id) {
 878         case KVM_IRQCHIP_IOAPIC:
 879                 memcpy(ioapic_irqchip(kvm),
 880                                 &chip->chip.ioapic,
 881                                 sizeof(struct kvm_ioapic_state));
 882                 break;
 883         default:
 884                 r = -EINVAL;
 885                 break;
 886         }
 887         return r;
 888 }
 889
 890 #define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
 891
 892 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 893 {
 894         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 895         int i;
 896
 897         vcpu_load(vcpu);
 898
 899         for (i = 0; i < 16; i++) {
 900                 vpd->vgr[i] = regs->vpd.vgr[i];
 901                 vpd->vbgr[i] = regs->vpd.vbgr[i];
 902         }
 903         for (i = 0; i < 128; i++)
 904                 vpd->vcr[i] = regs->vpd.vcr[i];
 905         vpd->vhpi = regs->vpd.vhpi;
 906         vpd->vnat = regs->vpd.vnat;
 907         vpd->vbnat = regs->vpd.vbnat;
 908         vpd->vpsr = regs->vpd.vpsr;
 909
 910         vpd->vpr = regs->vpd.vpr;
 911
 912         memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
 913
 914         RESTORE_REGS(mp_state);
 915         RESTORE_REGS(vmm_rr);
 916         memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
 917         memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
 918         RESTORE_REGS(itr_regions);
 919         RESTORE_REGS(dtr_regions);
 920         RESTORE_REGS(tc_regions);
 921         RESTORE_REGS(irq_check);
 922         RESTORE_REGS(itc_check);
 923         RESTORE_REGS(timer_check);
 924         RESTORE_REGS(timer_pending);
 925         RESTORE_REGS(last_itc);
 926         for (i = 0; i < 8; i++) {
 927                 vcpu->arch.vrr[i] = regs->vrr[i];
 928                 vcpu->arch.ibr[i] = regs->ibr[i];
 929                 vcpu->arch.dbr[i] = regs->dbr[i];
 930         }
 931         for (i = 0; i < 4; i++)
 932                 vcpu->arch.insvc[i] = regs->insvc[i];
 933         RESTORE_REGS(xtp);
 934         RESTORE_REGS(metaphysical_rr0);
 935         RESTORE_REGS(metaphysical_rr4);
 936         RESTORE_REGS(metaphysical_saved_rr0);
 937         RESTORE_REGS(metaphysical_saved_rr4);
 938         RESTORE_REGS(fp_psr);
 939         RESTORE_REGS(saved_gp);
 940
 941         vcpu->arch.irq_new_pending = 1;
 942         vcpu->arch.itc_offset = regs->saved_itc - kvm_get_itc(vcpu);
 943         set_bit(KVM_REQ_RESUME, &vcpu->requests);
 944
 945         vcpu_put(vcpu);
 946
 947         return 0;
 948 }
 949
 950 long kvm_arch_vm_ioctl(struct file *filp,
 951                 unsigned int ioctl, unsigned long arg)
 952 {
 953         struct kvm *kvm = filp->private_data;
 954         void __user *argp = (void __user *)arg;
 955         int r = -EINVAL;
 956
 957         switch (ioctl) {
 958         case KVM_SET_MEMORY_REGION: {
 959                 struct kvm_memory_region kvm_mem;
 960                 struct kvm_userspace_memory_region kvm_userspace_mem;
 961
 962                 r = -EFAULT;
 963                 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
 964                         goto out;
 965                 kvm_userspace_mem.slot = kvm_mem.slot;
 966                 kvm_userspace_mem.flags = kvm_mem.flags;
 967                 kvm_userspace_mem.guest_phys_addr =
 968                                         kvm_mem.guest_phys_addr;
 969                 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
 970                 r = kvm_vm_ioctl_set_memory_region(kvm,
 971                                         &kvm_userspace_mem, 0);
 972                 if (r)
 973                         goto out;
 974                 break;
 975                 }
 976         case KVM_CREATE_IRQCHIP:
 977                 r = -EFAULT;
 978                 r = kvm_ioapic_init(kvm);
 979                 if (r)
 980                         goto out;
 981                 r = kvm_setup_default_irq_routing(kvm);
 982                 if (r) {
 983                         kfree(kvm->arch.vioapic);
 984                         goto out;
 985                 }
 986                 break;
 987         case KVM_IRQ_LINE_STATUS:
 988         case KVM_IRQ_LINE: {
 989                 struct kvm_irq_level irq_event;
 990
 991                 r = -EFAULT;
 992                 if (copy_from_user(&irq_event, argp, sizeof irq_event))
 993                         goto out;
 994                 if (irqchip_in_kernel(kvm)) {
 995                         __s32 status;
 996                         mutex_lock(&kvm->lock);
 997                         status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
 998                                     irq_event.irq, irq_event.level);
 999                         mutex_unlock(&kvm->lock);
1000                         if (ioctl == KVM_IRQ_LINE_STATUS) {
1001                                 irq_event.status = status;
1002                                 if (copy_to_user(argp, &irq_event,
1003                                                         sizeof irq_event))
1004                                         goto out;
1005                         }
1006                         r = 0;
1007                 }
1008                 break;
1009                 }
1010         case KVM_GET_IRQCHIP: {
1011                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1012                 struct kvm_irqchip chip;
1013
1014                 r = -EFAULT;
1015                 if (copy_from_user(&chip, argp, sizeof chip))
1016                                 goto out;
1017                 r = -ENXIO;
1018                 if (!irqchip_in_kernel(kvm))
1019                         goto out;
1020                 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
1021                 if (r)
1022                         goto out;
1023                 r = -EFAULT;
1024                 if (copy_to_user(argp, &chip, sizeof chip))
1025                                 goto out;
1026                 r = 0;
1027                 break;
1028                 }
1029         case KVM_SET_IRQCHIP: {
1030                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1031                 struct kvm_irqchip chip;
1032
1033                 r = -EFAULT;
1034                 if (copy_from_user(&chip, argp, sizeof chip))
1035                                 goto out;
1036                 r = -ENXIO;
1037                 if (!irqchip_in_kernel(kvm))
1038                         goto out;
1039                 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1040                 if (r)
1041                         goto out;
1042                 r = 0;
1043                 break;
1044                 }
1045         default:
1046                 ;
1047         }
1048 out:
1049         return r;
1050 }
1051
1052 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1053                 struct kvm_sregs *sregs)
1054 {
1055         return -EINVAL;
1056 }
1057
1058 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1059                 struct kvm_sregs *sregs)
1060 {
1061         return -EINVAL;
1062
1063 }
1064 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1065                 struct kvm_translation *tr)
1066 {
1067
1068         return -EINVAL;
1069 }
1070
1071 static int kvm_alloc_vmm_area(void)
1072 {
1073         if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1074                 kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1075                                 get_order(KVM_VMM_SIZE));
1076                 if (!kvm_vmm_base)
1077                         return -ENOMEM;
1078
1079                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1080                 kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1081
1082                 printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1083                                 kvm_vmm_base, kvm_vm_buffer);
1084         }
1085
1086         return 0;
1087 }
1088
1089 static void kvm_free_vmm_area(void)
1090 {
1091         if (kvm_vmm_base) {
1092                 /*Zero this area before free to avoid bits leak!!*/
1093                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1094                 free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1095                 kvm_vmm_base  = 0;
1096                 kvm_vm_buffer = 0;
1097                 kvm_vsa_base = 0;
1098         }
1099 }
1100
1101 static void vti_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1102 {
1103 }
1104
1105 static int vti_init_vpd(struct kvm_vcpu *vcpu)
1106 {
1107         int i;
1108         union cpuid3_t cpuid3;
1109         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1110
1111         if (IS_ERR(vpd))
1112                 return PTR_ERR(vpd);
1113
1114         /* CPUID init */
1115         for (i = 0; i < 5; i++)
1116                 vpd->vcpuid[i] = ia64_get_cpuid(i);
1117
1118         /* Limit the CPUID number to 5 */
1119         cpuid3.value = vpd->vcpuid[3];
1120         cpuid3.number = 4;      /* 5 - 1 */
1121         vpd->vcpuid[3] = cpuid3.value;
1122
1123         /*Set vac and vdc fields*/
1124         vpd->vac.a_from_int_cr = 1;
1125         vpd->vac.a_to_int_cr = 1;
1126         vpd->vac.a_from_psr = 1;
1127         vpd->vac.a_from_cpuid = 1;
1128         vpd->vac.a_cover = 1;
1129         vpd->vac.a_bsw = 1;
1130         vpd->vac.a_int = 1;
1131         vpd->vdc.d_vmsw = 1;
1132
1133         /*Set virtual buffer*/
1134         vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
1135
1136         return 0;
1137 }
1138
1139 static int vti_create_vp(struct kvm_vcpu *vcpu)
1140 {
1141         long ret;
1142         struct vpd *vpd = vcpu->arch.vpd;
1143         unsigned long  vmm_ivt;
1144
1145         vmm_ivt = kvm_vmm_info->vmm_ivt;
1146
1147         printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
1148
1149         ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
1150
1151         if (ret) {
1152                 printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
1153                 return -EINVAL;
1154         }
1155         return 0;
1156 }
1157
1158 static void init_ptce_info(struct kvm_vcpu *vcpu)
1159 {
1160         ia64_ptce_info_t ptce = {0};
1161
1162         ia64_get_ptce(&ptce);
1163         vcpu->arch.ptce_base = ptce.base;
1164         vcpu->arch.ptce_count[0] = ptce.count[0];
1165         vcpu->arch.ptce_count[1] = ptce.count[1];
1166         vcpu->arch.ptce_stride[0] = ptce.stride[0];
1167         vcpu->arch.ptce_stride[1] = ptce.stride[1];
1168 }
1169
1170 static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
1171 {
1172         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
1173
1174         if (hrtimer_cancel(p_ht))
1175                 hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
1176 }
1177
1178 static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
1179 {
1180         struct kvm_vcpu *vcpu;
1181         wait_queue_head_t *q;
1182
1183         vcpu  = container_of(data, struct kvm_vcpu, arch.hlt_timer);
1184         q = &vcpu->wq;
1185
1186         if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
1187                 goto out;
1188
1189         if (waitqueue_active(q))
1190                 wake_up_interruptible(q);
1191
1192 out:
1193         vcpu->arch.timer_fired = 1;
1194         vcpu->arch.timer_check = 1;
1195         return HRTIMER_NORESTART;
1196 }
1197
1198 #define PALE_RESET_ENTRY    0x80000000ffffffb0UL
1199
1200 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1201 {
1202         struct kvm_vcpu *v;
1203         int r;
1204         int i;
1205         long itc_offset;
1206         struct kvm *kvm = vcpu->kvm;
1207         struct kvm_pt_regs *regs = vcpu_regs(vcpu);
1208
1209         union context *p_ctx = &vcpu->arch.guest;
1210         struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
1211
1212         /*Init vcpu context for first run.*/
1213         if (IS_ERR(vmm_vcpu))
1214                 return PTR_ERR(vmm_vcpu);
1215
1216         if (vcpu->vcpu_id == 0) {
1217                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1218
1219                 /*Set entry address for first run.*/
1220                 regs->cr_iip = PALE_RESET_ENTRY;
1221
1222                 /*Initialize itc offset for vcpus*/
1223                 itc_offset = 0UL - kvm_get_itc(vcpu);
1224                 for (i = 0; i < kvm->arch.online_vcpus; i++) {
1225                         v = (struct kvm_vcpu *)((char *)vcpu +
1226                                         sizeof(struct kvm_vcpu_data) * i);
1227                         v->arch.itc_offset = itc_offset;
1228                         v->arch.last_itc = 0;
1229                 }
1230         } else
1231                 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
1232
1233         r = -ENOMEM;
1234         vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
1235         if (!vcpu->arch.apic)
1236                 goto out;
1237         vcpu->arch.apic->vcpu = vcpu;
1238
1239         p_ctx->gr[1] = 0;
1240         p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + KVM_STK_OFFSET);
1241         p_ctx->gr[13] = (unsigned long)vmm_vcpu;
1242         p_ctx->psr = 0x1008522000UL;
1243         p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
1244         p_ctx->caller_unat = 0;
1245         p_ctx->pr = 0x0;
1246         p_ctx->ar[36] = 0x0; /*unat*/
1247         p_ctx->ar[19] = 0x0; /*rnat*/
1248         p_ctx->ar[18] = (unsigned long)vmm_vcpu +
1249                                 ((sizeof(struct kvm_vcpu)+15) & ~15);
1250         p_ctx->ar[64] = 0x0; /*pfs*/
1251         p_ctx->cr[0] = 0x7e04UL;
1252         p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
1253         p_ctx->cr[8] = 0x3c;
1254
1255         /*Initilize region register*/
1256         p_ctx->rr[0] = 0x30;
1257         p_ctx->rr[1] = 0x30;
1258         p_ctx->rr[2] = 0x30;
1259         p_ctx->rr[3] = 0x30;
1260         p_ctx->rr[4] = 0x30;
1261         p_ctx->rr[5] = 0x30;
1262         p_ctx->rr[7] = 0x30;
1263
1264         /*Initilize branch register 0*/
1265         p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
1266
1267         vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
1268         vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
1269         vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
1270
1271         hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
1272         vcpu->arch.hlt_timer.function = hlt_timer_fn;
1273
1274         vcpu->arch.last_run_cpu = -1;
1275         vcpu->arch.vpd = (struct vpd *)VPD_BASE(vcpu->vcpu_id);
1276         vcpu->arch.vsa_base = kvm_vsa_base;
1277         vcpu->arch.__gp = kvm_vmm_gp;
1278         vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
1279         vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_BASE(vcpu->vcpu_id);
1280         vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(vcpu->vcpu_id);
1281         init_ptce_info(vcpu);
1282
1283         r = 0;
1284 out:
1285         return r;
1286 }
1287
1288 static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
1289 {
1290         unsigned long psr;
1291         int r;
1292
1293         local_irq_save(psr);
1294         r = kvm_insert_vmm_mapping(vcpu);
1295         if (r)
1296                 goto fail;
1297         r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1298         if (r)
1299                 goto fail;
1300
1301         r = vti_init_vpd(vcpu);
1302         if (r) {
1303                 printk(KERN_DEBUG"kvm: vpd init error!!\n");
1304                 goto uninit;
1305         }
1306
1307         r = vti_create_vp(vcpu);
1308         if (r)
1309                 goto uninit;
1310
1311         kvm_purge_vmm_mapping(vcpu);
1312         local_irq_restore(psr);
1313
1314         return 0;
1315 uninit:
1316         kvm_vcpu_uninit(vcpu);
1317 fail:
1318         local_irq_restore(psr);
1319         return r;
1320 }
1321
1322 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1323                 unsigned int id)
1324 {
1325         struct kvm_vcpu *vcpu;
1326         unsigned long vm_base = kvm->arch.vm_base;
1327         int r;
1328         int cpu;
1329
1330         BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
1331
1332         r = -EINVAL;
1333         if (id >= KVM_MAX_VCPUS) {
1334                 printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
1335                                 KVM_MAX_VCPUS);
1336                 goto fail;
1337         }
1338
1339         r = -ENOMEM;
1340         if (!vm_base) {
1341                 printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1342                 goto fail;
1343         }
1344         vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
1345                                         vcpu_data[id].vcpu_struct));
1346         vcpu->kvm = kvm;
1347
1348         cpu = get_cpu();
1349         vti_vcpu_load(vcpu, cpu);
1350         r = vti_vcpu_setup(vcpu, id);
1351         put_cpu();
1352
1353         if (r) {
1354                 printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1355                 goto fail;
1356         }
1357
1358         kvm->arch.online_vcpus++;
1359
1360         return vcpu;
1361 fail:
1362         return ERR_PTR(r);
1363 }
1364
1365 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1366 {
1367         return 0;
1368 }
1369
1370 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1371 {
1372         return -EINVAL;
1373 }
1374
1375 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1376 {
1377         return -EINVAL;
1378 }
1379
1380 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1381                                         struct kvm_guest_debug *dbg)
1382 {
1383         return -EINVAL;
1384 }
1385
1386 static void free_kvm(struct kvm *kvm)
1387 {
1388         unsigned long vm_base = kvm->arch.vm_base;
1389
1390         if (vm_base) {
1391                 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1392                 free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1393         }
1394
1395 }
1396
1397 static void kvm_release_vm_pages(struct kvm *kvm)
1398 {
1399         struct kvm_memory_slot *memslot;
1400         int i, j;
1401         unsigned long base_gfn;
1402
1403         for (i = 0; i < kvm->nmemslots; i++) {
1404                 memslot = &kvm->memslots[i];
1405                 base_gfn = memslot->base_gfn;
1406
1407                 for (j = 0; j < memslot->npages; j++) {
1408                         if (memslot->rmap[j])
1409                                 put_page((struct page *)memslot->rmap[j]);
1410                 }
1411         }
1412 }
1413
1414 void kvm_arch_sync_events(struct kvm *kvm)
1415 {
1416 }
1417
1418 void kvm_arch_destroy_vm(struct kvm *kvm)
1419 {
1420         kvm_iommu_unmap_guest(kvm);
1421 #ifdef  KVM_CAP_DEVICE_ASSIGNMENT
1422         kvm_free_all_assigned_devices(kvm);
1423 #endif
1424         kfree(kvm->arch.vioapic);
1425         kvm_release_vm_pages(kvm);
1426         kvm_free_physmem(kvm);
1427         free_kvm(kvm);
1428 }
1429
1430 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1431 {
1432 }
1433
1434 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1435 {
1436         if (cpu != vcpu->cpu) {
1437                 vcpu->cpu = cpu;
1438                 if (vcpu->arch.ht_active)
1439                         kvm_migrate_hlt_timer(vcpu);
1440         }
1441 }
1442
1443 #define SAVE_REGS(_x)   regs->_x = vcpu->arch._x
1444
1445 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1446 {
1447         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1448         int i;
1449
1450         vcpu_load(vcpu);
1451
1452         for (i = 0; i < 16; i++) {
1453                 regs->vpd.vgr[i] = vpd->vgr[i];
1454                 regs->vpd.vbgr[i] = vpd->vbgr[i];
1455         }
1456         for (i = 0; i < 128; i++)
1457                 regs->vpd.vcr[i] = vpd->vcr[i];
1458         regs->vpd.vhpi = vpd->vhpi;
1459         regs->vpd.vnat = vpd->vnat;
1460         regs->vpd.vbnat = vpd->vbnat;
1461         regs->vpd.vpsr = vpd->vpsr;
1462         regs->vpd.vpr = vpd->vpr;
1463
1464         memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
1465
1466         SAVE_REGS(mp_state);
1467         SAVE_REGS(vmm_rr);
1468         memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1469         memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1470         SAVE_REGS(itr_regions);
1471         SAVE_REGS(dtr_regions);
1472         SAVE_REGS(tc_regions);
1473         SAVE_REGS(irq_check);
1474         SAVE_REGS(itc_check);
1475         SAVE_REGS(timer_check);
1476         SAVE_REGS(timer_pending);
1477         SAVE_REGS(last_itc);
1478         for (i = 0; i < 8; i++) {
1479                 regs->vrr[i] = vcpu->arch.vrr[i];
1480                 regs->ibr[i] = vcpu->arch.ibr[i];
1481                 regs->dbr[i] = vcpu->arch.dbr[i];
1482         }
1483         for (i = 0; i < 4; i++)
1484                 regs->insvc[i] = vcpu->arch.insvc[i];
1485         regs->saved_itc = vcpu->arch.itc_offset + kvm_get_itc(vcpu);
1486         SAVE_REGS(xtp);
1487         SAVE_REGS(metaphysical_rr0);
1488         SAVE_REGS(metaphysical_rr4);
1489         SAVE_REGS(metaphysical_saved_rr0);
1490         SAVE_REGS(metaphysical_saved_rr4);
1491         SAVE_REGS(fp_psr);
1492         SAVE_REGS(saved_gp);
1493
1494         vcpu_put(vcpu);
1495         return 0;
1496 }
1497
1498 int kvm_arch_vcpu_ioctl_get_stack(struct kvm_vcpu *vcpu,
1499                                   struct kvm_ia64_vcpu_stack *stack)
1500 {
1501         memcpy(stack, vcpu, sizeof(struct kvm_ia64_vcpu_stack));
1502         return 0;
1503 }
1504
1505 int kvm_arch_vcpu_ioctl_set_stack(struct kvm_vcpu *vcpu,
1506                                   struct kvm_ia64_vcpu_stack *stack)
1507 {
1508         memcpy(vcpu + 1, &stack->stack[0] + sizeof(struct kvm_vcpu),
1509                sizeof(struct kvm_ia64_vcpu_stack) - sizeof(struct kvm_vcpu));
1510
1511         vcpu->arch.exit_data = ((struct kvm_vcpu *)stack)->arch.exit_data;
1512         return 0;
1513 }
1514
1515 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1516 {
1517
1518         hrtimer_cancel(&vcpu->arch.hlt_timer);
1519         kfree(vcpu->arch.apic);
1520 }
1521
1522
1523 long kvm_arch_vcpu_ioctl(struct file *filp,
1524                          unsigned int ioctl, unsigned long arg)
1525 {
1526         struct kvm_vcpu *vcpu = filp->private_data;
1527         void __user *argp = (void __user *)arg;
1528         struct kvm_ia64_vcpu_stack *stack = NULL;
1529         long r;
1530
1531         switch (ioctl) {
1532         case KVM_IA64_VCPU_GET_STACK: {
1533                 struct kvm_ia64_vcpu_stack __user *user_stack;
1534                 void __user *first_p = argp;
1535
1536                 r = -EFAULT;
1537                 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1538                         goto out;
1539
1540                 if (!access_ok(VERIFY_WRITE, user_stack,
1541                                sizeof(struct kvm_ia64_vcpu_stack))) {
1542                         printk(KERN_INFO "KVM_IA64_VCPU_GET_STACK: "
1543                                "Illegal user destination address for stack\n");
1544                         goto out;
1545                 }
1546                 stack = kzalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1547                 if (!stack) {
1548                         r = -ENOMEM;
1549                         goto out;
1550                 }
1551
1552                 r = kvm_arch_vcpu_ioctl_get_stack(vcpu, stack);
1553                 if (r)
1554                         goto out;
1555
1556                 if (copy_to_user(user_stack, stack,
1557                                  sizeof(struct kvm_ia64_vcpu_stack)))
1558                         goto out;
1559
1560                 break;
1561         }
1562         case KVM_IA64_VCPU_SET_STACK: {
1563                 struct kvm_ia64_vcpu_stack __user *user_stack;
1564                 void __user *first_p = argp;
1565
1566                 r = -EFAULT;
1567                 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1568                         goto out;
1569
1570                 if (!access_ok(VERIFY_READ, user_stack,
1571                             sizeof(struct kvm_ia64_vcpu_stack))) {
1572                         printk(KERN_INFO "KVM_IA64_VCPU_SET_STACK: "
1573                                "Illegal user address for stack\n");
1574                         goto out;
1575                 }
1576                 stack = kmalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1577                 if (!stack) {
1578                         r = -ENOMEM;
1579                         goto out;
1580                 }
1581                 if (copy_from_user(stack, user_stack,
1582                                    sizeof(struct kvm_ia64_vcpu_stack)))
1583                         goto out;
1584
1585                 r = kvm_arch_vcpu_ioctl_set_stack(vcpu, stack);
1586                 break;
1587         }
1588
1589         default:
1590                 r = -EINVAL;
1591         }
1592
1593 out:
1594         kfree(stack);
1595         return r;
1596 }
1597
1598 int kvm_arch_set_memory_region(struct kvm *kvm,
1599                 struct kvm_userspace_memory_region *mem,
1600                 struct kvm_memory_slot old,
1601                 int user_alloc)
1602 {
1603         unsigned long i;
1604         unsigned long pfn;
1605         int npages = mem->memory_size >> PAGE_SHIFT;
1606         struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
1607         unsigned long base_gfn = memslot->base_gfn;
1608
1609         if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
1610                 return -ENOMEM;
1611
1612         for (i = 0; i < npages; i++) {
1613                 pfn = gfn_to_pfn(kvm, base_gfn + i);
1614                 if (!kvm_is_mmio_pfn(pfn)) {
1615                         kvm_set_pmt_entry(kvm, base_gfn + i,
1616                                         pfn << PAGE_SHIFT,
1617                                 _PAGE_AR_RWX | _PAGE_MA_WB);
1618                         memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1619                 } else {
1620                         kvm_set_pmt_entry(kvm, base_gfn + i,
1621                                         GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1622                                         _PAGE_MA_UC);
1623                         memslot->rmap[i] = 0;
1624                         }
1625         }
1626
1627         return 0;
1628 }
1629
1630 void kvm_arch_flush_shadow(struct kvm *kvm)
1631 {
1632 }
1633
1634 long kvm_arch_dev_ioctl(struct file *filp,
1635                         unsigned int ioctl, unsigned long arg)
1636 {
1637         return -EINVAL;
1638 }
1639
1640 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1641 {
1642         kvm_vcpu_uninit(vcpu);
1643 }
1644
1645 static int vti_cpu_has_kvm_support(void)
1646 {
1647         long  avail = 1, status = 1, control = 1;
1648         long ret;
1649
1650         ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1651         if (ret)
1652                 goto out;
1653
1654         if (!(avail & PAL_PROC_VM_BIT))
1655                 goto out;
1656
1657         printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1658
1659         ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1660         if (ret)
1661                 goto out;
1662         printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1663
1664         if (!(vp_env_info & VP_OPCODE)) {
1665                 printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1666                                 "vm_env_info:0x%lx\n", vp_env_info);
1667         }
1668
1669         return 1;
1670 out:
1671         return 0;
1672 }
1673
1674
1675 /*
1676  * On SN2, the ITC isn't stable, so copy in fast path code to use the
1677  * SN2 RTC, replacing the ITC based default verion.
1678  */
1679 static void kvm_patch_vmm(struct kvm_vmm_info *vmm_info,
1680                           struct module *module)
1681 {
1682         unsigned long new_ar, new_ar_sn2;
1683         unsigned long module_base;
1684
1685         if (!ia64_platform_is("sn2"))
1686                 return;
1687
1688         module_base = (unsigned long)module->module_core;
1689
1690         new_ar = kvm_vmm_base + vmm_info->patch_mov_ar - module_base;
1691         new_ar_sn2 = kvm_vmm_base + vmm_info->patch_mov_ar_sn2 - module_base;
1692
1693         printk(KERN_INFO "kvm: Patching ITC emulation to use SGI SN2 RTC "
1694                "as source\n");
1695
1696         /*
1697          * Copy the SN2 version of mov_ar into place. They are both
1698          * the same size, so 6 bundles is sufficient (6 * 0x10).
1699          */
1700         memcpy((void *)new_ar, (void *)new_ar_sn2, 0x60);
1701 }
1702
1703 static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1704                             struct module *module)
1705 {
1706         unsigned long module_base;
1707         unsigned long vmm_size;
1708
1709         unsigned long vmm_offset, func_offset, fdesc_offset;
1710         struct fdesc *p_fdesc;
1711
1712         BUG_ON(!module);
1713
1714         if (!kvm_vmm_base) {
1715                 printk("kvm: kvm area hasn't been initilized yet!!\n");
1716                 return -EFAULT;
1717         }
1718
1719         /*Calculate new position of relocated vmm module.*/
1720         module_base = (unsigned long)module->module_core;
1721         vmm_size = module->core_size;
1722         if (unlikely(vmm_size > KVM_VMM_SIZE))
1723                 return -EFAULT;
1724
1725         memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1726         kvm_patch_vmm(vmm_info, module);
1727         kvm_flush_icache(kvm_vmm_base, vmm_size);
1728
1729         /*Recalculate kvm_vmm_info based on new VMM*/
1730         vmm_offset = vmm_info->vmm_ivt - module_base;
1731         kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1732         printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1733                         kvm_vmm_info->vmm_ivt);
1734
1735         fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1736         kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1737                                                         fdesc_offset);
1738         func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1739         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1740         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1741         p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1742
1743         printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1744                         KVM_VMM_BASE+func_offset);
1745
1746         fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1747         kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1748                         fdesc_offset);
1749         func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1750         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1751         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1752         p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1753
1754         kvm_vmm_gp = p_fdesc->gp;
1755
1756         printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1757                                                 kvm_vmm_info->vmm_entry);
1758         printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1759                                                 KVM_VMM_BASE + func_offset);
1760
1761         return 0;
1762 }
1763
1764 int kvm_arch_init(void *opaque)
1765 {
1766         int r;
1767         struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1768
1769         if (!vti_cpu_has_kvm_support()) {
1770                 printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1771                 r = -EOPNOTSUPP;
1772                 goto out;
1773         }
1774
1775         if (kvm_vmm_info) {
1776                 printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1777                 r = -EEXIST;
1778                 goto out;
1779         }
1780
1781         r = -ENOMEM;
1782         kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1783         if (!kvm_vmm_info)
1784                 goto out;
1785
1786         if (kvm_alloc_vmm_area())
1787                 goto out_free0;
1788
1789         r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1790         if (r)
1791                 goto out_free1;
1792
1793         return 0;
1794
1795 out_free1:
1796         kvm_free_vmm_area();
1797 out_free0:
1798         kfree(kvm_vmm_info);
1799 out:
1800         return r;
1801 }
1802
1803 void kvm_arch_exit(void)
1804 {
1805         kvm_free_vmm_area();
1806         kfree(kvm_vmm_info);
1807         kvm_vmm_info = NULL;
1808 }
1809
1810 static int kvm_ia64_sync_dirty_log(struct kvm *kvm,
1811                 struct kvm_dirty_log *log)
1812 {
1813         struct kvm_memory_slot *memslot;
1814         int r, i;
1815         long n, base;
1816         unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
1817                         offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
1818
1819         r = -EINVAL;
1820         if (log->slot >= KVM_MEMORY_SLOTS)
1821                 goto out;
1822
1823         memslot = &kvm->memslots[log->slot];
1824         r = -ENOENT;
1825         if (!memslot->dirty_bitmap)
1826                 goto out;
1827
1828         n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1829         base = memslot->base_gfn / BITS_PER_LONG;
1830
1831         for (i = 0; i < n/sizeof(long); ++i) {
1832                 memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1833                 dirty_bitmap[base + i] = 0;
1834         }
1835         r = 0;
1836 out:
1837         return r;
1838 }
1839
1840 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1841                 struct kvm_dirty_log *log)
1842 {
1843         int r;
1844         int n;
1845         struct kvm_memory_slot *memslot;
1846         int is_dirty = 0;
1847
1848         spin_lock(&kvm->arch.dirty_log_lock);
1849
1850         r = kvm_ia64_sync_dirty_log(kvm, log);
1851         if (r)
1852                 goto out;
1853
1854         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1855         if (r)
1856                 goto out;
1857
1858         /* If nothing is dirty, don't bother messing with page tables. */
1859         if (is_dirty) {
1860                 kvm_flush_remote_tlbs(kvm);
1861                 memslot = &kvm->memslots[log->slot];
1862                 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1863                 memset(memslot->dirty_bitmap, 0, n);
1864         }
1865         r = 0;
1866 out:
1867         spin_unlock(&kvm->arch.dirty_log_lock);
1868         return r;
1869 }
1870
1871 int kvm_arch_hardware_setup(void)
1872 {
1873         return 0;
1874 }
1875
1876 void kvm_arch_hardware_unsetup(void)
1877 {
1878 }
1879
1880 static void vcpu_kick_intr(void *info)
1881 {
1882 #ifdef DEBUG
1883         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
1884         printk(KERN_DEBUG"vcpu_kick_intr %p \n", vcpu);
1885 #endif
1886 }
1887
1888 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
1889 {
1890         int ipi_pcpu = vcpu->cpu;
1891         int cpu = get_cpu();
1892
1893         if (waitqueue_active(&vcpu->wq))
1894                 wake_up_interruptible(&vcpu->wq);
1895
1896         if (vcpu->guest_mode && cpu != ipi_pcpu)
1897                 smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0);
1898         put_cpu();
1899 }
1900
1901 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)
1902 {
1903         return __apic_accept_irq(vcpu, irq->vector);
1904 }
1905
1906 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1907 {
1908         return apic->vcpu->vcpu_id == dest;
1909 }
1910
1911 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1912 {
1913         return 0;
1914 }
1915
1916 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
1917 {
1918         return vcpu1->arch.xtp - vcpu2->arch.xtp;
1919 }
1920
1921 int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
1922                 int short_hand, int dest, int dest_mode)
1923 {
1924         struct kvm_lapic *target = vcpu->arch.apic;
1925         return (dest_mode == 0) ?
1926                 kvm_apic_match_physical_addr(target, dest) :
1927                 kvm_apic_match_logical_addr(target, dest);
1928 }
1929
1930 static int find_highest_bits(int *dat)
1931 {
1932         u32  bits, bitnum;
1933         int i;
1934
1935         /* loop for all 256 bits */
1936         for (i = 7; i >= 0 ; i--) {
1937                 bits = dat[i];
1938                 if (bits) {
1939                         bitnum = fls(bits);
1940                         return i * 32 + bitnum - 1;
1941                 }
1942         }
1943
1944         return -1;
1945 }
1946
1947 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1948 {
1949     struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1950
1951     if (vpd->irr[0] & (1UL << NMI_VECTOR))
1952                 return NMI_VECTOR;
1953     if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1954                 return ExtINT_VECTOR;
1955
1956     return find_highest_bits((int *)&vpd->irr[0]);
1957 }
1958
1959 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
1960 {
1961         if (kvm_highest_pending_irq(vcpu) != -1)
1962                 return 1;
1963         return 0;
1964 }
1965
1966 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1967 {
1968         return vcpu->arch.timer_fired;
1969 }
1970
1971 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
1972 {
1973         return gfn;
1974 }
1975
1976 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1977 {
1978         return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE;
1979 }
1980
1981 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1982                                     struct kvm_mp_state *mp_state)
1983 {
1984         vcpu_load(vcpu);
1985         mp_state->mp_state = vcpu->arch.mp_state;
1986         vcpu_put(vcpu);
1987         return 0;
1988 }
1989
1990 static int vcpu_reset(struct kvm_vcpu *vcpu)
1991 {
1992         int r;
1993         long psr;
1994         local_irq_save(psr);
1995         r = kvm_insert_vmm_mapping(vcpu);
1996         if (r)
1997                 goto fail;
1998
1999         vcpu->arch.launched = 0;
2000         kvm_arch_vcpu_uninit(vcpu);
2001         r = kvm_arch_vcpu_init(vcpu);
2002         if (r)
2003                 goto fail;
2004
2005         kvm_purge_vmm_mapping(vcpu);
2006         r = 0;
2007 fail:
2008         local_irq_restore(psr);
2009         return r;
2010 }
2011
2012 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
2013                                     struct kvm_mp_state *mp_state)
2014 {
2015         int r = 0;
2016
2017         vcpu_load(vcpu);
2018         vcpu->arch.mp_state = mp_state->mp_state;
2019         if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
2020                 r = vcpu_reset(vcpu);
2021         vcpu_put(vcpu);
2022         return r;
2023 }