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         struct kvm_vcpu *vcpu;
 341
 342         kvm_for_each_vcpu(i, vcpu, kvm) {
 343                 lid.val = VCPU_LID(vcpu);
 344                 if (lid.id == id && lid.eid == eid)
 345                         return vcpu;
 346         }
 347
 348         return NULL;
 349 }
 350
 351 static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 352 {
 353         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 354         struct kvm_vcpu *target_vcpu;
 355         struct kvm_pt_regs *regs;
 356         union ia64_ipi_a addr = p->u.ipi_data.addr;
 357         union ia64_ipi_d data = p->u.ipi_data.data;
 358
 359         target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid);
 360         if (!target_vcpu)
 361                 return handle_vm_error(vcpu, kvm_run);
 362
 363         if (!target_vcpu->arch.launched) {
 364                 regs = vcpu_regs(target_vcpu);
 365
 366                 regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip;
 367                 regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp;
 368
 369                 target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 370                 if (waitqueue_active(&target_vcpu->wq))
 371                         wake_up_interruptible(&target_vcpu->wq);
 372         } else {
 373                 vcpu_deliver_ipi(target_vcpu, data.dm, data.vector);
 374                 if (target_vcpu != vcpu)
 375                         kvm_vcpu_kick(target_vcpu);
 376         }
 377
 378         return 1;
 379 }
 380
 381 struct call_data {
 382         struct kvm_ptc_g ptc_g_data;
 383         struct kvm_vcpu *vcpu;
 384 };
 385
 386 static void vcpu_global_purge(void *info)
 387 {
 388         struct call_data *p = (struct call_data *)info;
 389         struct kvm_vcpu *vcpu = p->vcpu;
 390
 391         if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
 392                 return;
 393
 394         set_bit(KVM_REQ_PTC_G, &vcpu->requests);
 395         if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) {
 396                 vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] =
 397                                                         p->ptc_g_data;
 398         } else {
 399                 clear_bit(KVM_REQ_PTC_G, &vcpu->requests);
 400                 vcpu->arch.ptc_g_count = 0;
 401                 set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
 402         }
 403 }
 404
 405 static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 406 {
 407         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 408         struct kvm *kvm = vcpu->kvm;
 409         struct call_data call_data;
 410         int i;
 411         struct kvm_vcpu *vcpui;
 412
 413         call_data.ptc_g_data = p->u.ptc_g_data;
 414
 415         kvm_for_each_vcpu(i, vcpui, kvm) {
 416                 if (vcpui->arch.mp_state == KVM_MP_STATE_UNINITIALIZED ||
 417                                 vcpu == vcpui)
 418                         continue;
 419
 420                 if (waitqueue_active(&vcpui->wq))
 421                         wake_up_interruptible(&vcpui->wq);
 422
 423                 if (vcpui->cpu != -1) {
 424                         call_data.vcpu = vcpui;
 425                         smp_call_function_single(vcpui->cpu,
 426                                         vcpu_global_purge, &call_data, 1);
 427                 } else
 428                         printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
 429
 430         }
 431         return 1;
 432 }
 433
 434 static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 435 {
 436         return 1;
 437 }
 438
 439 static int kvm_sn2_setup_mappings(struct kvm_vcpu *vcpu)
 440 {
 441         unsigned long pte, rtc_phys_addr, map_addr;
 442         int slot;
 443
 444         map_addr = KVM_VMM_BASE + (1UL << KVM_VMM_SHIFT);
 445         rtc_phys_addr = LOCAL_MMR_OFFSET | SH_RTC;
 446         pte = pte_val(mk_pte_phys(rtc_phys_addr, PAGE_KERNEL_UC));
 447         slot = ia64_itr_entry(0x3, map_addr, pte, PAGE_SHIFT);
 448         vcpu->arch.sn_rtc_tr_slot = slot;
 449         if (slot < 0) {
 450                 printk(KERN_ERR "Mayday mayday! RTC mapping failed!\n");
 451                 slot = 0;
 452         }
 453         return slot;
 454 }
 455
 456 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
 457 {
 458
 459         ktime_t kt;
 460         long itc_diff;
 461         unsigned long vcpu_now_itc;
 462         unsigned long expires;
 463         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
 464         unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
 465         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 466
 467         if (irqchip_in_kernel(vcpu->kvm)) {
 468
 469                 vcpu_now_itc = kvm_get_itc(vcpu) + vcpu->arch.itc_offset;
 470
 471                 if (time_after(vcpu_now_itc, vpd->itm)) {
 472                         vcpu->arch.timer_check = 1;
 473                         return 1;
 474                 }
 475                 itc_diff = vpd->itm - vcpu_now_itc;
 476                 if (itc_diff < 0)
 477                         itc_diff = -itc_diff;
 478
 479                 expires = div64_u64(itc_diff, cyc_per_usec);
 480                 kt = ktime_set(0, 1000 * expires);
 481
 482                 vcpu->arch.ht_active = 1;
 483                 hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
 484
 485                 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
 486                 kvm_vcpu_block(vcpu);
 487                 hrtimer_cancel(p_ht);
 488                 vcpu->arch.ht_active = 0;
 489
 490                 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests) ||
 491                                 kvm_cpu_has_pending_timer(vcpu))
 492                         if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
 493                                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 494
 495                 if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
 496                         return -EINTR;
 497                 return 1;
 498         } else {
 499                 printk(KERN_ERR"kvm: Unsupported userspace halt!");
 500                 return 0;
 501         }
 502 }
 503
 504 static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
 505                 struct kvm_run *kvm_run)
 506 {
 507         kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
 508         return 0;
 509 }
 510
 511 static int handle_external_interrupt(struct kvm_vcpu *vcpu,
 512                 struct kvm_run *kvm_run)
 513 {
 514         return 1;
 515 }
 516
 517 static int handle_vcpu_debug(struct kvm_vcpu *vcpu,
 518                                 struct kvm_run *kvm_run)
 519 {
 520         printk("VMM: %s", vcpu->arch.log_buf);
 521         return 1;
 522 }
 523
 524 static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
 525                 struct kvm_run *kvm_run) = {
 526         [EXIT_REASON_VM_PANIC]              = handle_vm_error,
 527         [EXIT_REASON_MMIO_INSTRUCTION]      = handle_mmio,
 528         [EXIT_REASON_PAL_CALL]              = handle_pal_call,
 529         [EXIT_REASON_SAL_CALL]              = handle_sal_call,
 530         [EXIT_REASON_SWITCH_RR6]            = handle_switch_rr6,
 531         [EXIT_REASON_VM_DESTROY]            = handle_vm_shutdown,
 532         [EXIT_REASON_EXTERNAL_INTERRUPT]    = handle_external_interrupt,
 533         [EXIT_REASON_IPI]                   = handle_ipi,
 534         [EXIT_REASON_PTC_G]                 = handle_global_purge,
 535         [EXIT_REASON_DEBUG]                 = handle_vcpu_debug,
 536
 537 };
 538
 539 static const int kvm_vti_max_exit_handlers =
 540                 sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
 541
 542 static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
 543 {
 544         struct exit_ctl_data *p_exit_data;
 545
 546         p_exit_data = kvm_get_exit_data(vcpu);
 547         return p_exit_data->exit_reason;
 548 }
 549
 550 /*
 551  * The guest has exited.  See if we can fix it or if we need userspace
 552  * assistance.
 553  */
 554 static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 555 {
 556         u32 exit_reason = kvm_get_exit_reason(vcpu);
 557         vcpu->arch.last_exit = exit_reason;
 558
 559         if (exit_reason < kvm_vti_max_exit_handlers
 560                         && kvm_vti_exit_handlers[exit_reason])
 561                 return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
 562         else {
 563                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 564                 kvm_run->hw.hardware_exit_reason = exit_reason;
 565         }
 566         return 0;
 567 }
 568
 569 static inline void vti_set_rr6(unsigned long rr6)
 570 {
 571         ia64_set_rr(RR6, rr6);
 572         ia64_srlz_i();
 573 }
 574
 575 static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
 576 {
 577         unsigned long pte;
 578         struct kvm *kvm = vcpu->kvm;
 579         int r;
 580
 581         /*Insert a pair of tr to map vmm*/
 582         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
 583         r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 584         if (r < 0)
 585                 goto out;
 586         vcpu->arch.vmm_tr_slot = r;
 587         /*Insert a pairt of tr to map data of vm*/
 588         pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
 589         r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
 590                                         pte, KVM_VM_DATA_SHIFT);
 591         if (r < 0)
 592                 goto out;
 593         vcpu->arch.vm_tr_slot = r;
 594
 595 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 596         if (kvm->arch.is_sn2) {
 597                 r = kvm_sn2_setup_mappings(vcpu);
 598                 if (r < 0)
 599                         goto out;
 600         }
 601 #endif
 602
 603         r = 0;
 604 out:
 605         return r;
 606 }
 607
 608 static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
 609 {
 610         struct kvm *kvm = vcpu->kvm;
 611         ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
 612         ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
 613 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 614         if (kvm->arch.is_sn2)
 615                 ia64_ptr_entry(0x3, vcpu->arch.sn_rtc_tr_slot);
 616 #endif
 617 }
 618
 619 static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
 620 {
 621         unsigned long psr;
 622         int r;
 623         int cpu = smp_processor_id();
 624
 625         if (vcpu->arch.last_run_cpu != cpu ||
 626                         per_cpu(last_vcpu, cpu) != vcpu) {
 627                 per_cpu(last_vcpu, cpu) = vcpu;
 628                 vcpu->arch.last_run_cpu = cpu;
 629                 kvm_flush_tlb_all();
 630         }
 631
 632         vcpu->arch.host_rr6 = ia64_get_rr(RR6);
 633         vti_set_rr6(vcpu->arch.vmm_rr);
 634         local_irq_save(psr);
 635         r = kvm_insert_vmm_mapping(vcpu);
 636         local_irq_restore(psr);
 637         return r;
 638 }
 639
 640 static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
 641 {
 642         kvm_purge_vmm_mapping(vcpu);
 643         vti_set_rr6(vcpu->arch.host_rr6);
 644 }
 645
 646 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 647 {
 648         union context *host_ctx, *guest_ctx;
 649         int r;
 650
 651         /*
 652          * down_read() may sleep and return with interrupts enabled
 653          */
 654         down_read(&vcpu->kvm->slots_lock);
 655
 656 again:
 657         if (signal_pending(current)) {
 658                 r = -EINTR;
 659                 kvm_run->exit_reason = KVM_EXIT_INTR;
 660                 goto out;
 661         }
 662
 663         preempt_disable();
 664         local_irq_disable();
 665
 666         /*Get host and guest context with guest address space.*/
 667         host_ctx = kvm_get_host_context(vcpu);
 668         guest_ctx = kvm_get_guest_context(vcpu);
 669
 670         clear_bit(KVM_REQ_KICK, &vcpu->requests);
 671
 672         r = kvm_vcpu_pre_transition(vcpu);
 673         if (r < 0)
 674                 goto vcpu_run_fail;
 675
 676         up_read(&vcpu->kvm->slots_lock);
 677         kvm_guest_enter();
 678
 679         /*
 680          * Transition to the guest
 681          */
 682         kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
 683
 684         kvm_vcpu_post_transition(vcpu);
 685
 686         vcpu->arch.launched = 1;
 687         set_bit(KVM_REQ_KICK, &vcpu->requests);
 688         local_irq_enable();
 689
 690         /*
 691          * We must have an instruction between local_irq_enable() and
 692          * kvm_guest_exit(), so the timer interrupt isn't delayed by
 693          * the interrupt shadow.  The stat.exits increment will do nicely.
 694          * But we need to prevent reordering, hence this barrier():
 695          */
 696         barrier();
 697         kvm_guest_exit();
 698         preempt_enable();
 699
 700         down_read(&vcpu->kvm->slots_lock);
 701
 702         r = kvm_handle_exit(kvm_run, vcpu);
 703
 704         if (r > 0) {
 705                 if (!need_resched())
 706                         goto again;
 707         }
 708
 709 out:
 710         up_read(&vcpu->kvm->slots_lock);
 711         if (r > 0) {
 712                 kvm_resched(vcpu);
 713                 down_read(&vcpu->kvm->slots_lock);
 714                 goto again;
 715         }
 716
 717         return r;
 718
 719 vcpu_run_fail:
 720         local_irq_enable();
 721         preempt_enable();
 722         kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
 723         goto out;
 724 }
 725
 726 static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
 727 {
 728         struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
 729
 730         if (!vcpu->mmio_is_write)
 731                 memcpy(&p->data, vcpu->mmio_data, 8);
 732         p->state = STATE_IORESP_READY;
 733 }
 734
 735 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 736 {
 737         int r;
 738         sigset_t sigsaved;
 739
 740         vcpu_load(vcpu);
 741
 742         if (vcpu->sigset_active)
 743                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 744
 745         if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
 746                 kvm_vcpu_block(vcpu);
 747                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 748                 r = -EAGAIN;
 749                 goto out;
 750         }
 751
 752         if (vcpu->mmio_needed) {
 753                 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
 754                 kvm_set_mmio_data(vcpu);
 755                 vcpu->mmio_read_completed = 1;
 756                 vcpu->mmio_needed = 0;
 757         }
 758         r = __vcpu_run(vcpu, kvm_run);
 759 out:
 760         if (vcpu->sigset_active)
 761                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 762
 763         vcpu_put(vcpu);
 764         return r;
 765 }
 766
 767 static struct kvm *kvm_alloc_kvm(void)
 768 {
 769
 770         struct kvm *kvm;
 771         uint64_t  vm_base;
 772
 773         BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
 774
 775         vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
 776
 777         if (!vm_base)
 778                 return ERR_PTR(-ENOMEM);
 779
 780         memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
 781         kvm = (struct kvm *)(vm_base +
 782                         offsetof(struct kvm_vm_data, kvm_vm_struct));
 783         kvm->arch.vm_base = vm_base;
 784         printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
 785
 786         return kvm;
 787 }
 788
 789 struct kvm_io_range {
 790         unsigned long start;
 791         unsigned long size;
 792         unsigned long type;
 793 };
 794
 795 static const struct kvm_io_range io_ranges[] = {
 796         {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
 797         {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
 798         {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
 799         {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
 800         {PIB_START, PIB_SIZE, GPFN_PIB},
 801 };
 802
 803 static void kvm_build_io_pmt(struct kvm *kvm)
 804 {
 805         unsigned long i, j;
 806
 807         /* Mark I/O ranges */
 808         for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
 809                                                         i++) {
 810                 for (j = io_ranges[i].start;
 811                                 j < io_ranges[i].start + io_ranges[i].size;
 812                                 j += PAGE_SIZE)
 813                         kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
 814                                         io_ranges[i].type, 0);
 815         }
 816
 817 }
 818
 819 /*Use unused rids to virtualize guest rid.*/
 820 #define GUEST_PHYSICAL_RR0      0x1739
 821 #define GUEST_PHYSICAL_RR4      0x2739
 822 #define VMM_INIT_RR             0x1660
 823
 824 static void kvm_init_vm(struct kvm *kvm)
 825 {
 826         BUG_ON(!kvm);
 827
 828         kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
 829         kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
 830         kvm->arch.vmm_init_rr = VMM_INIT_RR;
 831
 832         /*
 833          *Fill P2M entries for MMIO/IO ranges
 834          */
 835         kvm_build_io_pmt(kvm);
 836
 837         INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
 838
 839         /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
 840         set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
 841 }
 842
 843 struct  kvm *kvm_arch_create_vm(void)
 844 {
 845         struct kvm *kvm = kvm_alloc_kvm();
 846
 847         if (IS_ERR(kvm))
 848                 return ERR_PTR(-ENOMEM);
 849
 850         kvm->arch.is_sn2 = ia64_platform_is("sn2");
 851
 852         kvm_init_vm(kvm);
 853
 854         return kvm;
 855
 856 }
 857
 858 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
 859                                         struct kvm_irqchip *chip)
 860 {
 861         int r;
 862
 863         r = 0;
 864         switch (chip->chip_id) {
 865         case KVM_IRQCHIP_IOAPIC:
 866                 memcpy(&chip->chip.ioapic, ioapic_irqchip(kvm),
 867                                 sizeof(struct kvm_ioapic_state));
 868                 break;
 869         default:
 870                 r = -EINVAL;
 871                 break;
 872         }
 873         return r;
 874 }
 875
 876 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
 877 {
 878         int r;
 879
 880         r = 0;
 881         switch (chip->chip_id) {
 882         case KVM_IRQCHIP_IOAPIC:
 883                 memcpy(ioapic_irqchip(kvm),
 884                                 &chip->chip.ioapic,
 885                                 sizeof(struct kvm_ioapic_state));
 886                 break;
 887         default:
 888                 r = -EINVAL;
 889                 break;
 890         }
 891         return r;
 892 }
 893
 894 #define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
 895
 896 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 897 {
 898         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 899         int i;
 900
 901         vcpu_load(vcpu);
 902
 903         for (i = 0; i < 16; i++) {
 904                 vpd->vgr[i] = regs->vpd.vgr[i];
 905                 vpd->vbgr[i] = regs->vpd.vbgr[i];
 906         }
 907         for (i = 0; i < 128; i++)
 908                 vpd->vcr[i] = regs->vpd.vcr[i];
 909         vpd->vhpi = regs->vpd.vhpi;
 910         vpd->vnat = regs->vpd.vnat;
 911         vpd->vbnat = regs->vpd.vbnat;
 912         vpd->vpsr = regs->vpd.vpsr;
 913
 914         vpd->vpr = regs->vpd.vpr;
 915
 916         memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
 917
 918         RESTORE_REGS(mp_state);
 919         RESTORE_REGS(vmm_rr);
 920         memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
 921         memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
 922         RESTORE_REGS(itr_regions);
 923         RESTORE_REGS(dtr_regions);
 924         RESTORE_REGS(tc_regions);
 925         RESTORE_REGS(irq_check);
 926         RESTORE_REGS(itc_check);
 927         RESTORE_REGS(timer_check);
 928         RESTORE_REGS(timer_pending);
 929         RESTORE_REGS(last_itc);
 930         for (i = 0; i < 8; i++) {
 931                 vcpu->arch.vrr[i] = regs->vrr[i];
 932                 vcpu->arch.ibr[i] = regs->ibr[i];
 933                 vcpu->arch.dbr[i] = regs->dbr[i];
 934         }
 935         for (i = 0; i < 4; i++)
 936                 vcpu->arch.insvc[i] = regs->insvc[i];
 937         RESTORE_REGS(xtp);
 938         RESTORE_REGS(metaphysical_rr0);
 939         RESTORE_REGS(metaphysical_rr4);
 940         RESTORE_REGS(metaphysical_saved_rr0);
 941         RESTORE_REGS(metaphysical_saved_rr4);
 942         RESTORE_REGS(fp_psr);
 943         RESTORE_REGS(saved_gp);
 944
 945         vcpu->arch.irq_new_pending = 1;
 946         vcpu->arch.itc_offset = regs->saved_itc - kvm_get_itc(vcpu);
 947         set_bit(KVM_REQ_RESUME, &vcpu->requests);
 948
 949         vcpu_put(vcpu);
 950
 951         return 0;
 952 }
 953
 954 long kvm_arch_vm_ioctl(struct file *filp,
 955                 unsigned int ioctl, unsigned long arg)
 956 {
 957         struct kvm *kvm = filp->private_data;
 958         void __user *argp = (void __user *)arg;
 959         int r = -EINVAL;
 960
 961         switch (ioctl) {
 962         case KVM_SET_MEMORY_REGION: {
 963                 struct kvm_memory_region kvm_mem;
 964                 struct kvm_userspace_memory_region kvm_userspace_mem;
 965
 966                 r = -EFAULT;
 967                 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
 968                         goto out;
 969                 kvm_userspace_mem.slot = kvm_mem.slot;
 970                 kvm_userspace_mem.flags = kvm_mem.flags;
 971                 kvm_userspace_mem.guest_phys_addr =
 972                                         kvm_mem.guest_phys_addr;
 973                 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
 974                 r = kvm_vm_ioctl_set_memory_region(kvm,
 975                                         &kvm_userspace_mem, 0);
 976                 if (r)
 977                         goto out;
 978                 break;
 979                 }
 980         case KVM_CREATE_IRQCHIP:
 981                 r = -EFAULT;
 982                 r = kvm_ioapic_init(kvm);
 983                 if (r)
 984                         goto out;
 985                 r = kvm_setup_default_irq_routing(kvm);
 986                 if (r) {
 987                         kfree(kvm->arch.vioapic);
 988                         goto out;
 989                 }
 990                 break;
 991         case KVM_IRQ_LINE_STATUS:
 992         case KVM_IRQ_LINE: {
 993                 struct kvm_irq_level irq_event;
 994
 995                 r = -EFAULT;
 996                 if (copy_from_user(&irq_event, argp, sizeof irq_event))
 997                         goto out;
 998                 if (irqchip_in_kernel(kvm)) {
 999                         __s32 status;
1000                         mutex_lock(&kvm->irq_lock);
1001                         status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
1002                                     irq_event.irq, irq_event.level);
1003                         mutex_unlock(&kvm->irq_lock);
1004                         if (ioctl == KVM_IRQ_LINE_STATUS) {
1005                                 irq_event.status = status;
1006                                 if (copy_to_user(argp, &irq_event,
1007                                                         sizeof irq_event))
1008                                         goto out;
1009                         }
1010                         r = 0;
1011                 }
1012                 break;
1013                 }
1014         case KVM_GET_IRQCHIP: {
1015                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1016                 struct kvm_irqchip chip;
1017
1018                 r = -EFAULT;
1019                 if (copy_from_user(&chip, argp, sizeof chip))
1020                                 goto out;
1021                 r = -ENXIO;
1022                 if (!irqchip_in_kernel(kvm))
1023                         goto out;
1024                 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
1025                 if (r)
1026                         goto out;
1027                 r = -EFAULT;
1028                 if (copy_to_user(argp, &chip, sizeof chip))
1029                                 goto out;
1030                 r = 0;
1031                 break;
1032                 }
1033         case KVM_SET_IRQCHIP: {
1034                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1035                 struct kvm_irqchip chip;
1036
1037                 r = -EFAULT;
1038                 if (copy_from_user(&chip, argp, sizeof chip))
1039                                 goto out;
1040                 r = -ENXIO;
1041                 if (!irqchip_in_kernel(kvm))
1042                         goto out;
1043                 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1044                 if (r)
1045                         goto out;
1046                 r = 0;
1047                 break;
1048                 }
1049         default:
1050                 ;
1051         }
1052 out:
1053         return r;
1054 }
1055
1056 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1057                 struct kvm_sregs *sregs)
1058 {
1059         return -EINVAL;
1060 }
1061
1062 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1063                 struct kvm_sregs *sregs)
1064 {
1065         return -EINVAL;
1066
1067 }
1068 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1069                 struct kvm_translation *tr)
1070 {
1071
1072         return -EINVAL;
1073 }
1074
1075 static int kvm_alloc_vmm_area(void)
1076 {
1077         if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1078                 kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1079                                 get_order(KVM_VMM_SIZE));
1080                 if (!kvm_vmm_base)
1081                         return -ENOMEM;
1082
1083                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1084                 kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1085
1086                 printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1087                                 kvm_vmm_base, kvm_vm_buffer);
1088         }
1089
1090         return 0;
1091 }
1092
1093 static void kvm_free_vmm_area(void)
1094 {
1095         if (kvm_vmm_base) {
1096                 /*Zero this area before free to avoid bits leak!!*/
1097                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1098                 free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1099                 kvm_vmm_base  = 0;
1100                 kvm_vm_buffer = 0;
1101                 kvm_vsa_base = 0;
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 (kvm_vcpu_is_bsp(vcpu)) {
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_MAX_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         local_irq_restore(psr);
1296         if (r)
1297                 goto fail;
1298         r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1299         if (r)
1300                 goto fail;
1301
1302         r = vti_init_vpd(vcpu);
1303         if (r) {
1304                 printk(KERN_DEBUG"kvm: vpd init error!!\n");
1305                 goto uninit;
1306         }
1307
1308         r = vti_create_vp(vcpu);
1309         if (r)
1310                 goto uninit;
1311
1312         kvm_purge_vmm_mapping(vcpu);
1313
1314         return 0;
1315 uninit:
1316         kvm_vcpu_uninit(vcpu);
1317 fail:
1318         return r;
1319 }
1320
1321 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1322                 unsigned int id)
1323 {
1324         struct kvm_vcpu *vcpu;
1325         unsigned long vm_base = kvm->arch.vm_base;
1326         int r;
1327         int cpu;
1328
1329         BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
1330
1331         r = -EINVAL;
1332         if (id >= KVM_MAX_VCPUS) {
1333                 printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
1334                                 KVM_MAX_VCPUS);
1335                 goto fail;
1336         }
1337
1338         r = -ENOMEM;
1339         if (!vm_base) {
1340                 printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1341                 goto fail;
1342         }
1343         vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
1344                                         vcpu_data[id].vcpu_struct));
1345         vcpu->kvm = kvm;
1346
1347         cpu = get_cpu();
1348         r = vti_vcpu_setup(vcpu, id);
1349         put_cpu();
1350
1351         if (r) {
1352                 printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1353                 goto fail;
1354         }
1355
1356         return vcpu;
1357 fail:
1358         return ERR_PTR(r);
1359 }
1360
1361 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1362 {
1363         return 0;
1364 }
1365
1366 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1367 {
1368         return -EINVAL;
1369 }
1370
1371 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1372 {
1373         return -EINVAL;
1374 }
1375
1376 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1377                                         struct kvm_guest_debug *dbg)
1378 {
1379         return -EINVAL;
1380 }
1381
1382 static void free_kvm(struct kvm *kvm)
1383 {
1384         unsigned long vm_base = kvm->arch.vm_base;
1385
1386         if (vm_base) {
1387                 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1388                 free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1389         }
1390
1391 }
1392
1393 static void kvm_release_vm_pages(struct kvm *kvm)
1394 {
1395         struct kvm_memory_slot *memslot;
1396         int i, j;
1397         unsigned long base_gfn;
1398
1399         for (i = 0; i < kvm->nmemslots; i++) {
1400                 memslot = &kvm->memslots[i];
1401                 base_gfn = memslot->base_gfn;
1402
1403                 for (j = 0; j < memslot->npages; j++) {
1404                         if (memslot->rmap[j])
1405                                 put_page((struct page *)memslot->rmap[j]);
1406                 }
1407         }
1408 }
1409
1410 void kvm_arch_sync_events(struct kvm *kvm)
1411 {
1412 }
1413
1414 void kvm_arch_destroy_vm(struct kvm *kvm)
1415 {
1416         kvm_iommu_unmap_guest(kvm);
1417 #ifdef  KVM_CAP_DEVICE_ASSIGNMENT
1418         kvm_free_all_assigned_devices(kvm);
1419 #endif
1420         kfree(kvm->arch.vioapic);
1421         kvm_release_vm_pages(kvm);
1422         kvm_free_physmem(kvm);
1423         free_kvm(kvm);
1424 }
1425
1426 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1427 {
1428 }
1429
1430 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1431 {
1432         if (cpu != vcpu->cpu) {
1433                 vcpu->cpu = cpu;
1434                 if (vcpu->arch.ht_active)
1435                         kvm_migrate_hlt_timer(vcpu);
1436         }
1437 }
1438
1439 #define SAVE_REGS(_x)   regs->_x = vcpu->arch._x
1440
1441 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1442 {
1443         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1444         int i;
1445
1446         vcpu_load(vcpu);
1447
1448         for (i = 0; i < 16; i++) {
1449                 regs->vpd.vgr[i] = vpd->vgr[i];
1450                 regs->vpd.vbgr[i] = vpd->vbgr[i];
1451         }
1452         for (i = 0; i < 128; i++)
1453                 regs->vpd.vcr[i] = vpd->vcr[i];
1454         regs->vpd.vhpi = vpd->vhpi;
1455         regs->vpd.vnat = vpd->vnat;
1456         regs->vpd.vbnat = vpd->vbnat;
1457         regs->vpd.vpsr = vpd->vpsr;
1458         regs->vpd.vpr = vpd->vpr;
1459
1460         memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
1461
1462         SAVE_REGS(mp_state);
1463         SAVE_REGS(vmm_rr);
1464         memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1465         memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1466         SAVE_REGS(itr_regions);
1467         SAVE_REGS(dtr_regions);
1468         SAVE_REGS(tc_regions);
1469         SAVE_REGS(irq_check);
1470         SAVE_REGS(itc_check);
1471         SAVE_REGS(timer_check);
1472         SAVE_REGS(timer_pending);
1473         SAVE_REGS(last_itc);
1474         for (i = 0; i < 8; i++) {
1475                 regs->vrr[i] = vcpu->arch.vrr[i];
1476                 regs->ibr[i] = vcpu->arch.ibr[i];
1477                 regs->dbr[i] = vcpu->arch.dbr[i];
1478         }
1479         for (i = 0; i < 4; i++)
1480                 regs->insvc[i] = vcpu->arch.insvc[i];
1481         regs->saved_itc = vcpu->arch.itc_offset + kvm_get_itc(vcpu);
1482         SAVE_REGS(xtp);
1483         SAVE_REGS(metaphysical_rr0);
1484         SAVE_REGS(metaphysical_rr4);
1485         SAVE_REGS(metaphysical_saved_rr0);
1486         SAVE_REGS(metaphysical_saved_rr4);
1487         SAVE_REGS(fp_psr);
1488         SAVE_REGS(saved_gp);
1489
1490         vcpu_put(vcpu);
1491         return 0;
1492 }
1493
1494 int kvm_arch_vcpu_ioctl_get_stack(struct kvm_vcpu *vcpu,
1495                                   struct kvm_ia64_vcpu_stack *stack)
1496 {
1497         memcpy(stack, vcpu, sizeof(struct kvm_ia64_vcpu_stack));
1498         return 0;
1499 }
1500
1501 int kvm_arch_vcpu_ioctl_set_stack(struct kvm_vcpu *vcpu,
1502                                   struct kvm_ia64_vcpu_stack *stack)
1503 {
1504         memcpy(vcpu + 1, &stack->stack[0] + sizeof(struct kvm_vcpu),
1505                sizeof(struct kvm_ia64_vcpu_stack) - sizeof(struct kvm_vcpu));
1506
1507         vcpu->arch.exit_data = ((struct kvm_vcpu *)stack)->arch.exit_data;
1508         return 0;
1509 }
1510
1511 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1512 {
1513
1514         hrtimer_cancel(&vcpu->arch.hlt_timer);
1515         kfree(vcpu->arch.apic);
1516 }
1517
1518
1519 long kvm_arch_vcpu_ioctl(struct file *filp,
1520                          unsigned int ioctl, unsigned long arg)
1521 {
1522         struct kvm_vcpu *vcpu = filp->private_data;
1523         void __user *argp = (void __user *)arg;
1524         struct kvm_ia64_vcpu_stack *stack = NULL;
1525         long r;
1526
1527         switch (ioctl) {
1528         case KVM_IA64_VCPU_GET_STACK: {
1529                 struct kvm_ia64_vcpu_stack __user *user_stack;
1530                 void __user *first_p = argp;
1531
1532                 r = -EFAULT;
1533                 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1534                         goto out;
1535
1536                 if (!access_ok(VERIFY_WRITE, user_stack,
1537                                sizeof(struct kvm_ia64_vcpu_stack))) {
1538                         printk(KERN_INFO "KVM_IA64_VCPU_GET_STACK: "
1539                                "Illegal user destination address for stack\n");
1540                         goto out;
1541                 }
1542                 stack = kzalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1543                 if (!stack) {
1544                         r = -ENOMEM;
1545                         goto out;
1546                 }
1547
1548                 r = kvm_arch_vcpu_ioctl_get_stack(vcpu, stack);
1549                 if (r)
1550                         goto out;
1551
1552                 if (copy_to_user(user_stack, stack,
1553                                  sizeof(struct kvm_ia64_vcpu_stack)))
1554                         goto out;
1555
1556                 break;
1557         }
1558         case KVM_IA64_VCPU_SET_STACK: {
1559                 struct kvm_ia64_vcpu_stack __user *user_stack;
1560                 void __user *first_p = argp;
1561
1562                 r = -EFAULT;
1563                 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1564                         goto out;
1565
1566                 if (!access_ok(VERIFY_READ, user_stack,
1567                             sizeof(struct kvm_ia64_vcpu_stack))) {
1568                         printk(KERN_INFO "KVM_IA64_VCPU_SET_STACK: "
1569                                "Illegal user address for stack\n");
1570                         goto out;
1571                 }
1572                 stack = kmalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1573                 if (!stack) {
1574                         r = -ENOMEM;
1575                         goto out;
1576                 }
1577                 if (copy_from_user(stack, user_stack,
1578                                    sizeof(struct kvm_ia64_vcpu_stack)))
1579                         goto out;
1580
1581                 r = kvm_arch_vcpu_ioctl_set_stack(vcpu, stack);
1582                 break;
1583         }
1584
1585         default:
1586                 r = -EINVAL;
1587         }
1588
1589 out:
1590         kfree(stack);
1591         return r;
1592 }
1593
1594 int kvm_arch_set_memory_region(struct kvm *kvm,
1595                 struct kvm_userspace_memory_region *mem,
1596                 struct kvm_memory_slot old,
1597                 int user_alloc)
1598 {
1599         unsigned long i;
1600         unsigned long pfn;
1601         int npages = mem->memory_size >> PAGE_SHIFT;
1602         struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
1603         unsigned long base_gfn = memslot->base_gfn;
1604
1605         if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
1606                 return -ENOMEM;
1607
1608         for (i = 0; i < npages; i++) {
1609                 pfn = gfn_to_pfn(kvm, base_gfn + i);
1610                 if (!kvm_is_mmio_pfn(pfn)) {
1611                         kvm_set_pmt_entry(kvm, base_gfn + i,
1612                                         pfn << PAGE_SHIFT,
1613                                 _PAGE_AR_RWX | _PAGE_MA_WB);
1614                         memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1615                 } else {
1616                         kvm_set_pmt_entry(kvm, base_gfn + i,
1617                                         GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1618                                         _PAGE_MA_UC);
1619                         memslot->rmap[i] = 0;
1620                         }
1621         }
1622
1623         return 0;
1624 }
1625
1626 void kvm_arch_flush_shadow(struct kvm *kvm)
1627 {
1628         kvm_flush_remote_tlbs(kvm);
1629 }
1630
1631 long kvm_arch_dev_ioctl(struct file *filp,
1632                         unsigned int ioctl, unsigned long arg)
1633 {
1634         return -EINVAL;
1635 }
1636
1637 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1638 {
1639         kvm_vcpu_uninit(vcpu);
1640 }
1641
1642 static int vti_cpu_has_kvm_support(void)
1643 {
1644         long  avail = 1, status = 1, control = 1;
1645         long ret;
1646
1647         ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1648         if (ret)
1649                 goto out;
1650
1651         if (!(avail & PAL_PROC_VM_BIT))
1652                 goto out;
1653
1654         printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1655
1656         ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1657         if (ret)
1658                 goto out;
1659         printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1660
1661         if (!(vp_env_info & VP_OPCODE)) {
1662                 printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1663                                 "vm_env_info:0x%lx\n", vp_env_info);
1664         }
1665
1666         return 1;
1667 out:
1668         return 0;
1669 }
1670
1671
1672 /*
1673  * On SN2, the ITC isn't stable, so copy in fast path code to use the
1674  * SN2 RTC, replacing the ITC based default verion.
1675  */
1676 static void kvm_patch_vmm(struct kvm_vmm_info *vmm_info,
1677                           struct module *module)
1678 {
1679         unsigned long new_ar, new_ar_sn2;
1680         unsigned long module_base;
1681
1682         if (!ia64_platform_is("sn2"))
1683                 return;
1684
1685         module_base = (unsigned long)module->module_core;
1686
1687         new_ar = kvm_vmm_base + vmm_info->patch_mov_ar - module_base;
1688         new_ar_sn2 = kvm_vmm_base + vmm_info->patch_mov_ar_sn2 - module_base;
1689
1690         printk(KERN_INFO "kvm: Patching ITC emulation to use SGI SN2 RTC "
1691                "as source\n");
1692
1693         /*
1694          * Copy the SN2 version of mov_ar into place. They are both
1695          * the same size, so 6 bundles is sufficient (6 * 0x10).
1696          */
1697         memcpy((void *)new_ar, (void *)new_ar_sn2, 0x60);
1698 }
1699
1700 static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1701                             struct module *module)
1702 {
1703         unsigned long module_base;
1704         unsigned long vmm_size;
1705
1706         unsigned long vmm_offset, func_offset, fdesc_offset;
1707         struct fdesc *p_fdesc;
1708
1709         BUG_ON(!module);
1710
1711         if (!kvm_vmm_base) {
1712                 printk("kvm: kvm area hasn't been initilized yet!!\n");
1713                 return -EFAULT;
1714         }
1715
1716         /*Calculate new position of relocated vmm module.*/
1717         module_base = (unsigned long)module->module_core;
1718         vmm_size = module->core_size;
1719         if (unlikely(vmm_size > KVM_VMM_SIZE))
1720                 return -EFAULT;
1721
1722         memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1723         kvm_patch_vmm(vmm_info, module);
1724         kvm_flush_icache(kvm_vmm_base, vmm_size);
1725
1726         /*Recalculate kvm_vmm_info based on new VMM*/
1727         vmm_offset = vmm_info->vmm_ivt - module_base;
1728         kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1729         printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1730                         kvm_vmm_info->vmm_ivt);
1731
1732         fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1733         kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1734                                                         fdesc_offset);
1735         func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1736         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1737         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1738         p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1739
1740         printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1741                         KVM_VMM_BASE+func_offset);
1742
1743         fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1744         kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1745                         fdesc_offset);
1746         func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1747         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1748         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1749         p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1750
1751         kvm_vmm_gp = p_fdesc->gp;
1752
1753         printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1754                                                 kvm_vmm_info->vmm_entry);
1755         printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1756                                                 KVM_VMM_BASE + func_offset);
1757
1758         return 0;
1759 }
1760
1761 int kvm_arch_init(void *opaque)
1762 {
1763         int r;
1764         struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1765
1766         if (!vti_cpu_has_kvm_support()) {
1767                 printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1768                 r = -EOPNOTSUPP;
1769                 goto out;
1770         }
1771
1772         if (kvm_vmm_info) {
1773                 printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1774                 r = -EEXIST;
1775                 goto out;
1776         }
1777
1778         r = -ENOMEM;
1779         kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1780         if (!kvm_vmm_info)
1781                 goto out;
1782
1783         if (kvm_alloc_vmm_area())
1784                 goto out_free0;
1785
1786         r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1787         if (r)
1788                 goto out_free1;
1789
1790         return 0;
1791
1792 out_free1:
1793         kvm_free_vmm_area();
1794 out_free0:
1795         kfree(kvm_vmm_info);
1796 out:
1797         return r;
1798 }
1799
1800 void kvm_arch_exit(void)
1801 {
1802         kvm_free_vmm_area();
1803         kfree(kvm_vmm_info);
1804         kvm_vmm_info = NULL;
1805 }
1806
1807 static int kvm_ia64_sync_dirty_log(struct kvm *kvm,
1808                 struct kvm_dirty_log *log)
1809 {
1810         struct kvm_memory_slot *memslot;
1811         int r, i;
1812         long n, base;
1813         unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
1814                         offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
1815
1816         r = -EINVAL;
1817         if (log->slot >= KVM_MEMORY_SLOTS)
1818                 goto out;
1819
1820         memslot = &kvm->memslots[log->slot];
1821         r = -ENOENT;
1822         if (!memslot->dirty_bitmap)
1823                 goto out;
1824
1825         n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1826         base = memslot->base_gfn / BITS_PER_LONG;
1827
1828         for (i = 0; i < n/sizeof(long); ++i) {
1829                 memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1830                 dirty_bitmap[base + i] = 0;
1831         }
1832         r = 0;
1833 out:
1834         return r;
1835 }
1836
1837 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1838                 struct kvm_dirty_log *log)
1839 {
1840         int r;
1841         int n;
1842         struct kvm_memory_slot *memslot;
1843         int is_dirty = 0;
1844
1845         spin_lock(&kvm->arch.dirty_log_lock);
1846
1847         r = kvm_ia64_sync_dirty_log(kvm, log);
1848         if (r)
1849                 goto out;
1850
1851         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1852         if (r)
1853                 goto out;
1854
1855         /* If nothing is dirty, don't bother messing with page tables. */
1856         if (is_dirty) {
1857                 kvm_flush_remote_tlbs(kvm);
1858                 memslot = &kvm->memslots[log->slot];
1859                 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
1860                 memset(memslot->dirty_bitmap, 0, n);
1861         }
1862         r = 0;
1863 out:
1864         spin_unlock(&kvm->arch.dirty_log_lock);
1865         return r;
1866 }
1867
1868 int kvm_arch_hardware_setup(void)
1869 {
1870         return 0;
1871 }
1872
1873 void kvm_arch_hardware_unsetup(void)
1874 {
1875 }
1876
1877 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
1878 {
1879         int me;
1880         int cpu = vcpu->cpu;
1881
1882         if (waitqueue_active(&vcpu->wq))
1883                 wake_up_interruptible(&vcpu->wq);
1884
1885         me = get_cpu();
1886         if (cpu != me && (unsigned) cpu < nr_cpu_ids && cpu_online(cpu))
1887                 if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests))
1888                         smp_send_reschedule(cpu);
1889         put_cpu();
1890 }
1891
1892 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)
1893 {
1894         return __apic_accept_irq(vcpu, irq->vector);
1895 }
1896
1897 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1898 {
1899         return apic->vcpu->vcpu_id == dest;
1900 }
1901
1902 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1903 {
1904         return 0;
1905 }
1906
1907 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
1908 {
1909         return vcpu1->arch.xtp - vcpu2->arch.xtp;
1910 }
1911
1912 int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
1913                 int short_hand, int dest, int dest_mode)
1914 {
1915         struct kvm_lapic *target = vcpu->arch.apic;
1916         return (dest_mode == 0) ?
1917                 kvm_apic_match_physical_addr(target, dest) :
1918                 kvm_apic_match_logical_addr(target, dest);
1919 }
1920
1921 static int find_highest_bits(int *dat)
1922 {
1923         u32  bits, bitnum;
1924         int i;
1925
1926         /* loop for all 256 bits */
1927         for (i = 7; i >= 0 ; i--) {
1928                 bits = dat[i];
1929                 if (bits) {
1930                         bitnum = fls(bits);
1931                         return i * 32 + bitnum - 1;
1932                 }
1933         }
1934
1935         return -1;
1936 }
1937
1938 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1939 {
1940     struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1941
1942     if (vpd->irr[0] & (1UL << NMI_VECTOR))
1943                 return NMI_VECTOR;
1944     if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1945                 return ExtINT_VECTOR;
1946
1947     return find_highest_bits((int *)&vpd->irr[0]);
1948 }
1949
1950 int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
1951 {
1952         if (kvm_highest_pending_irq(vcpu) != -1)
1953                 return 1;
1954         return 0;
1955 }
1956
1957 int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
1958 {
1959         /* do real check here */
1960         return 1;
1961 }
1962
1963 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1964 {
1965         return vcpu->arch.timer_fired;
1966 }
1967
1968 gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
1969 {
1970         return gfn;
1971 }
1972
1973 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1974 {
1975         return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE;
1976 }
1977
1978 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1979                                     struct kvm_mp_state *mp_state)
1980 {
1981         vcpu_load(vcpu);
1982         mp_state->mp_state = vcpu->arch.mp_state;
1983         vcpu_put(vcpu);
1984         return 0;
1985 }
1986
1987 static int vcpu_reset(struct kvm_vcpu *vcpu)
1988 {
1989         int r;
1990         long psr;
1991         local_irq_save(psr);
1992         r = kvm_insert_vmm_mapping(vcpu);
1993         local_irq_restore(psr);
1994         if (r)
1995                 goto fail;
1996
1997         vcpu->arch.launched = 0;
1998         kvm_arch_vcpu_uninit(vcpu);
1999         r = kvm_arch_vcpu_init(vcpu);
2000         if (r)
2001                 goto fail;
2002
2003         kvm_purge_vmm_mapping(vcpu);
2004         r = 0;
2005 fail:
2006         return r;
2007 }
2008
2009 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
2010                                     struct kvm_mp_state *mp_state)
2011 {
2012         int r = 0;
2013
2014         vcpu_load(vcpu);
2015         vcpu->arch.mp_state = mp_state->mp_state;
2016         if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
2017                 r = vcpu_reset(vcpu);
2018         vcpu_put(vcpu);
2019         return r;
2020 }