arch/ia64/kvm/kvm-ia64.c

   1 /*
   2  * kvm_ia64.c: Basic KVM suppport On Itanium series processors
   3  *
   4  *
   5  *      Copyright (C) 2007, Intel Corporation.
   6  *      Xiantao Zhang  (xiantao.zhang@intel.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms and conditions of the GNU General Public License,
  10  * version 2, as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  19  * Place - Suite 330, Boston, MA 02111-1307 USA.
  20  *
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/errno.h>
  25 #include <linux/percpu.h>
  26 #include <linux/fs.h>
  27 #include <linux/slab.h>
  28 #include <linux/smp.h>
  29 #include <linux/kvm_host.h>
  30 #include <linux/kvm.h>
  31 #include <linux/bitops.h>
  32 #include <linux/hrtimer.h>
  33 #include <linux/uaccess.h>
  34 #include <linux/iommu.h>
  35 #include <linux/intel-iommu.h>
  36 #include <linux/pci.h>
  37
  38 #include <asm/pgtable.h>
  39 #include <asm/gcc_intrin.h>
  40 #include <asm/pal.h>
  41 #include <asm/cacheflush.h>
  42 #include <asm/div64.h>
  43 #include <asm/tlb.h>
  44 #include <asm/elf.h>
  45 #include <asm/sn/addrs.h>
  46 #include <asm/sn/clksupport.h>
  47 #include <asm/sn/shub_mmr.h>
  48
  49 #include "misc.h"
  50 #include "vti.h"
  51 #include "iodev.h"
  52 #include "ioapic.h"
  53 #include "lapic.h"
  54 #include "irq.h"
  55
  56 static unsigned long kvm_vmm_base;
  57 static unsigned long kvm_vsa_base;
  58 static unsigned long kvm_vm_buffer;
  59 static unsigned long kvm_vm_buffer_size;
  60 unsigned long kvm_vmm_gp;
  61
  62 static long vp_env_info;
  63
  64 static struct kvm_vmm_info *kvm_vmm_info;
  65
  66 static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu);
  67
  68 struct kvm_stats_debugfs_item debugfs_entries[] = {
  69         { NULL }
  70 };
  71
  72 static unsigned long kvm_get_itc(struct kvm_vcpu *vcpu)
  73 {
  74 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
  75         if (vcpu->kvm->arch.is_sn2)
  76                 return rtc_time();
  77         else
  78 #endif
  79                 return ia64_getreg(_IA64_REG_AR_ITC);
  80 }
  81
  82 static void kvm_flush_icache(unsigned long start, unsigned long len)
  83 {
  84         int l;
  85
  86         for (l = 0; l < (len + 32); l += 32)
  87                 ia64_fc((void *)(start + l));
  88
  89         ia64_sync_i();
  90         ia64_srlz_i();
  91 }
  92
  93 static void kvm_flush_tlb_all(void)
  94 {
  95         unsigned long i, j, count0, count1, stride0, stride1, addr;
  96         long flags;
  97
  98         addr    = local_cpu_data->ptce_base;
  99         count0  = local_cpu_data->ptce_count[0];
 100         count1  = local_cpu_data->ptce_count[1];
 101         stride0 = local_cpu_data->ptce_stride[0];
 102         stride1 = local_cpu_data->ptce_stride[1];
 103
 104         local_irq_save(flags);
 105         for (i = 0; i < count0; ++i) {
 106                 for (j = 0; j < count1; ++j) {
 107                         ia64_ptce(addr);
 108                         addr += stride1;
 109                 }
 110                 addr += stride0;
 111         }
 112         local_irq_restore(flags);
 113         ia64_srlz_i();                  /* srlz.i implies srlz.d */
 114 }
 115
 116 long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler)
 117 {
 118         struct ia64_pal_retval iprv;
 119
 120         PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva,
 121                         (u64)opt_handler);
 122
 123         return iprv.status;
 124 }
 125
 126 static  DEFINE_SPINLOCK(vp_lock);
 127
 128 int kvm_arch_hardware_enable(void *garbage)
 129 {
 130         long  status;
 131         long  tmp_base;
 132         unsigned long pte;
 133         unsigned long saved_psr;
 134         int slot;
 135
 136         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
 137         local_irq_save(saved_psr);
 138         slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 139         local_irq_restore(saved_psr);
 140         if (slot < 0)
 141                 return -EINVAL;
 142
 143         spin_lock(&vp_lock);
 144         status = ia64_pal_vp_init_env(kvm_vsa_base ?
 145                                 VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
 146                         __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
 147         if (status != 0) {
 148                 spin_unlock(&vp_lock);
 149                 printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
 150                 return -EINVAL;
 151         }
 152
 153         if (!kvm_vsa_base) {
 154                 kvm_vsa_base = tmp_base;
 155                 printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
 156         }
 157         spin_unlock(&vp_lock);
 158         ia64_ptr_entry(0x3, slot);
 159
 160         return 0;
 161 }
 162
 163 void kvm_arch_hardware_disable(void *garbage)
 164 {
 165
 166         long status;
 167         int slot;
 168         unsigned long pte;
 169         unsigned long saved_psr;
 170         unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
 171
 172         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
 173                                 PAGE_KERNEL));
 174
 175         local_irq_save(saved_psr);
 176         slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 177         local_irq_restore(saved_psr);
 178         if (slot < 0)
 179                 return;
 180
 181         status = ia64_pal_vp_exit_env(host_iva);
 182         if (status)
 183                 printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
 184                                 status);
 185         ia64_ptr_entry(0x3, slot);
 186 }
 187
 188 void kvm_arch_check_processor_compat(void *rtn)
 189 {
 190         *(int *)rtn = 0;
 191 }
 192
 193 int kvm_dev_ioctl_check_extension(long ext)
 194 {
 195
 196         int r;
 197
 198         switch (ext) {
 199         case KVM_CAP_IRQCHIP:
 200         case KVM_CAP_MP_STATE:
 201         case KVM_CAP_IRQ_INJECT_STATUS:
 202                 r = 1;
 203                 break;
 204         case KVM_CAP_COALESCED_MMIO:
 205                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 206                 break;
 207         case KVM_CAP_IOMMU:
 208                 r = iommu_present(&pci_bus_type);
 209                 break;
 210         default:
 211                 r = 0;
 212         }
 213         return r;
 214
 215 }
 216
 217 static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 218 {
 219         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 220         kvm_run->hw.hardware_exit_reason = 1;
 221         return 0;
 222 }
 223
 224 static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 225 {
 226         struct kvm_mmio_req *p;
 227         struct kvm_io_device *mmio_dev;
 228         int r;
 229
 230         p = kvm_get_vcpu_ioreq(vcpu);
 231
 232         if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS)
 233                 goto mmio;
 234         vcpu->mmio_needed = 1;
 235         vcpu->mmio_phys_addr = kvm_run->mmio.phys_addr = p->addr;
 236         vcpu->mmio_size = kvm_run->mmio.len = p->size;
 237         vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir;
 238
 239         if (vcpu->mmio_is_write)
 240                 memcpy(vcpu->mmio_data, &p->data, p->size);
 241         memcpy(kvm_run->mmio.data, &p->data, p->size);
 242         kvm_run->exit_reason = KVM_EXIT_MMIO;
 243         return 0;
 244 mmio:
 245         if (p->dir)
 246                 r = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, p->addr,
 247                                     p->size, &p->data);
 248         else
 249                 r = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, p->addr,
 250                                      p->size, &p->data);
 251         if (r)
 252                 printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr);
 253         p->state = STATE_IORESP_READY;
 254
 255         return 1;
 256 }
 257
 258 static int handle_pal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 259 {
 260         struct exit_ctl_data *p;
 261
 262         p = kvm_get_exit_data(vcpu);
 263
 264         if (p->exit_reason == EXIT_REASON_PAL_CALL)
 265                 return kvm_pal_emul(vcpu, kvm_run);
 266         else {
 267                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 268                 kvm_run->hw.hardware_exit_reason = 2;
 269                 return 0;
 270         }
 271 }
 272
 273 static int handle_sal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 274 {
 275         struct exit_ctl_data *p;
 276
 277         p = kvm_get_exit_data(vcpu);
 278
 279         if (p->exit_reason == EXIT_REASON_SAL_CALL) {
 280                 kvm_sal_emul(vcpu);
 281                 return 1;
 282         } else {
 283                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 284                 kvm_run->hw.hardware_exit_reason = 3;
 285                 return 0;
 286         }
 287
 288 }
 289
 290 static int __apic_accept_irq(struct kvm_vcpu *vcpu, uint64_t vector)
 291 {
 292         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 293
 294         if (!test_and_set_bit(vector, &vpd->irr[0])) {
 295                 vcpu->arch.irq_new_pending = 1;
 296                 kvm_vcpu_kick(vcpu);
 297                 return 1;
 298         }
 299         return 0;
 300 }
 301
 302 /*
 303  *  offset: address offset to IPI space.
 304  *  value:  deliver value.
 305  */
 306 static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm,
 307                                 uint64_t vector)
 308 {
 309         switch (dm) {
 310         case SAPIC_FIXED:
 311                 break;
 312         case SAPIC_NMI:
 313                 vector = 2;
 314                 break;
 315         case SAPIC_EXTINT:
 316                 vector = 0;
 317                 break;
 318         case SAPIC_INIT:
 319         case SAPIC_PMI:
 320         default:
 321                 printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n");
 322                 return;
 323         }
 324         __apic_accept_irq(vcpu, vector);
 325 }
 326
 327 static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id,
 328                         unsigned long eid)
 329 {
 330         union ia64_lid lid;
 331         int i;
 332         struct kvm_vcpu *vcpu;
 333
 334         kvm_for_each_vcpu(i, vcpu, kvm) {
 335                 lid.val = VCPU_LID(vcpu);
 336                 if (lid.id == id && lid.eid == eid)
 337                         return vcpu;
 338         }
 339
 340         return NULL;
 341 }
 342
 343 static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 344 {
 345         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 346         struct kvm_vcpu *target_vcpu;
 347         struct kvm_pt_regs *regs;
 348         union ia64_ipi_a addr = p->u.ipi_data.addr;
 349         union ia64_ipi_d data = p->u.ipi_data.data;
 350
 351         target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid);
 352         if (!target_vcpu)
 353                 return handle_vm_error(vcpu, kvm_run);
 354
 355         if (!target_vcpu->arch.launched) {
 356                 regs = vcpu_regs(target_vcpu);
 357
 358                 regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip;
 359                 regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp;
 360
 361                 target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 362                 if (waitqueue_active(&target_vcpu->wq))
 363                         wake_up_interruptible(&target_vcpu->wq);
 364         } else {
 365                 vcpu_deliver_ipi(target_vcpu, data.dm, data.vector);
 366                 if (target_vcpu != vcpu)
 367                         kvm_vcpu_kick(target_vcpu);
 368         }
 369
 370         return 1;
 371 }
 372
 373 struct call_data {
 374         struct kvm_ptc_g ptc_g_data;
 375         struct kvm_vcpu *vcpu;
 376 };
 377
 378 static void vcpu_global_purge(void *info)
 379 {
 380         struct call_data *p = (struct call_data *)info;
 381         struct kvm_vcpu *vcpu = p->vcpu;
 382
 383         if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
 384                 return;
 385
 386         set_bit(KVM_REQ_PTC_G, &vcpu->requests);
 387         if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) {
 388                 vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] =
 389                                                         p->ptc_g_data;
 390         } else {
 391                 clear_bit(KVM_REQ_PTC_G, &vcpu->requests);
 392                 vcpu->arch.ptc_g_count = 0;
 393                 set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
 394         }
 395 }
 396
 397 static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 398 {
 399         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 400         struct kvm *kvm = vcpu->kvm;
 401         struct call_data call_data;
 402         int i;
 403         struct kvm_vcpu *vcpui;
 404
 405         call_data.ptc_g_data = p->u.ptc_g_data;
 406
 407         kvm_for_each_vcpu(i, vcpui, kvm) {
 408                 if (vcpui->arch.mp_state == KVM_MP_STATE_UNINITIALIZED ||
 409                                 vcpu == vcpui)
 410                         continue;
 411
 412                 if (waitqueue_active(&vcpui->wq))
 413                         wake_up_interruptible(&vcpui->wq);
 414
 415                 if (vcpui->cpu != -1) {
 416                         call_data.vcpu = vcpui;
 417                         smp_call_function_single(vcpui->cpu,
 418                                         vcpu_global_purge, &call_data, 1);
 419                 } else
 420                         printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
 421
 422         }
 423         return 1;
 424 }
 425
 426 static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 427 {
 428         return 1;
 429 }
 430
 431 static int kvm_sn2_setup_mappings(struct kvm_vcpu *vcpu)
 432 {
 433         unsigned long pte, rtc_phys_addr, map_addr;
 434         int slot;
 435
 436         map_addr = KVM_VMM_BASE + (1UL << KVM_VMM_SHIFT);
 437         rtc_phys_addr = LOCAL_MMR_OFFSET | SH_RTC;
 438         pte = pte_val(mk_pte_phys(rtc_phys_addr, PAGE_KERNEL_UC));
 439         slot = ia64_itr_entry(0x3, map_addr, pte, PAGE_SHIFT);
 440         vcpu->arch.sn_rtc_tr_slot = slot;
 441         if (slot < 0) {
 442                 printk(KERN_ERR "Mayday mayday! RTC mapping failed!\n");
 443                 slot = 0;
 444         }
 445         return slot;
 446 }
 447
 448 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
 449 {
 450
 451         ktime_t kt;
 452         long itc_diff;
 453         unsigned long vcpu_now_itc;
 454         unsigned long expires;
 455         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
 456         unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
 457         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 458
 459         if (irqchip_in_kernel(vcpu->kvm)) {
 460
 461                 vcpu_now_itc = kvm_get_itc(vcpu) + vcpu->arch.itc_offset;
 462
 463                 if (time_after(vcpu_now_itc, vpd->itm)) {
 464                         vcpu->arch.timer_check = 1;
 465                         return 1;
 466                 }
 467                 itc_diff = vpd->itm - vcpu_now_itc;
 468                 if (itc_diff < 0)
 469                         itc_diff = -itc_diff;
 470
 471                 expires = div64_u64(itc_diff, cyc_per_usec);
 472                 kt = ktime_set(0, 1000 * expires);
 473
 474                 vcpu->arch.ht_active = 1;
 475                 hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
 476
 477                 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
 478                 kvm_vcpu_block(vcpu);
 479                 hrtimer_cancel(p_ht);
 480                 vcpu->arch.ht_active = 0;
 481
 482                 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests) ||
 483                                 kvm_cpu_has_pending_timer(vcpu))
 484                         if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
 485                                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 486
 487                 if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
 488                         return -EINTR;
 489                 return 1;
 490         } else {
 491                 printk(KERN_ERR"kvm: Unsupported userspace halt!");
 492                 return 0;
 493         }
 494 }
 495
 496 static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
 497                 struct kvm_run *kvm_run)
 498 {
 499         kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
 500         return 0;
 501 }
 502
 503 static int handle_external_interrupt(struct kvm_vcpu *vcpu,
 504                 struct kvm_run *kvm_run)
 505 {
 506         return 1;
 507 }
 508
 509 static int handle_vcpu_debug(struct kvm_vcpu *vcpu,
 510                                 struct kvm_run *kvm_run)
 511 {
 512         printk("VMM: %s", vcpu->arch.log_buf);
 513         return 1;
 514 }
 515
 516 static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
 517                 struct kvm_run *kvm_run) = {
 518         [EXIT_REASON_VM_PANIC]              = handle_vm_error,
 519         [EXIT_REASON_MMIO_INSTRUCTION]      = handle_mmio,
 520         [EXIT_REASON_PAL_CALL]              = handle_pal_call,
 521         [EXIT_REASON_SAL_CALL]              = handle_sal_call,
 522         [EXIT_REASON_SWITCH_RR6]            = handle_switch_rr6,
 523         [EXIT_REASON_VM_DESTROY]            = handle_vm_shutdown,
 524         [EXIT_REASON_EXTERNAL_INTERRUPT]    = handle_external_interrupt,
 525         [EXIT_REASON_IPI]                   = handle_ipi,
 526         [EXIT_REASON_PTC_G]                 = handle_global_purge,
 527         [EXIT_REASON_DEBUG]                 = handle_vcpu_debug,
 528
 529 };
 530
 531 static const int kvm_vti_max_exit_handlers =
 532                 sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
 533
 534 static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
 535 {
 536         struct exit_ctl_data *p_exit_data;
 537
 538         p_exit_data = kvm_get_exit_data(vcpu);
 539         return p_exit_data->exit_reason;
 540 }
 541
 542 /*
 543  * The guest has exited.  See if we can fix it or if we need userspace
 544  * assistance.
 545  */
 546 static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 547 {
 548         u32 exit_reason = kvm_get_exit_reason(vcpu);
 549         vcpu->arch.last_exit = exit_reason;
 550
 551         if (exit_reason < kvm_vti_max_exit_handlers
 552                         && kvm_vti_exit_handlers[exit_reason])
 553                 return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
 554         else {
 555                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 556                 kvm_run->hw.hardware_exit_reason = exit_reason;
 557         }
 558         return 0;
 559 }
 560
 561 static inline void vti_set_rr6(unsigned long rr6)
 562 {
 563         ia64_set_rr(RR6, rr6);
 564         ia64_srlz_i();
 565 }
 566
 567 static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
 568 {
 569         unsigned long pte;
 570         struct kvm *kvm = vcpu->kvm;
 571         int r;
 572
 573         /*Insert a pair of tr to map vmm*/
 574         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
 575         r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 576         if (r < 0)
 577                 goto out;
 578         vcpu->arch.vmm_tr_slot = r;
 579         /*Insert a pairt of tr to map data of vm*/
 580         pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
 581         r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
 582                                         pte, KVM_VM_DATA_SHIFT);
 583         if (r < 0)
 584                 goto out;
 585         vcpu->arch.vm_tr_slot = r;
 586
 587 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 588         if (kvm->arch.is_sn2) {
 589                 r = kvm_sn2_setup_mappings(vcpu);
 590                 if (r < 0)
 591                         goto out;
 592         }
 593 #endif
 594
 595         r = 0;
 596 out:
 597         return r;
 598 }
 599
 600 static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
 601 {
 602         struct kvm *kvm = vcpu->kvm;
 603         ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
 604         ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
 605 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 606         if (kvm->arch.is_sn2)
 607                 ia64_ptr_entry(0x3, vcpu->arch.sn_rtc_tr_slot);
 608 #endif
 609 }
 610
 611 static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
 612 {
 613         unsigned long psr;
 614         int r;
 615         int cpu = smp_processor_id();
 616
 617         if (vcpu->arch.last_run_cpu != cpu ||
 618                         per_cpu(last_vcpu, cpu) != vcpu) {
 619                 per_cpu(last_vcpu, cpu) = vcpu;
 620                 vcpu->arch.last_run_cpu = cpu;
 621                 kvm_flush_tlb_all();
 622         }
 623
 624         vcpu->arch.host_rr6 = ia64_get_rr(RR6);
 625         vti_set_rr6(vcpu->arch.vmm_rr);
 626         local_irq_save(psr);
 627         r = kvm_insert_vmm_mapping(vcpu);
 628         local_irq_restore(psr);
 629         return r;
 630 }
 631
 632 static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
 633 {
 634         kvm_purge_vmm_mapping(vcpu);
 635         vti_set_rr6(vcpu->arch.host_rr6);
 636 }
 637
 638 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 639 {
 640         union context *host_ctx, *guest_ctx;
 641         int r, idx;
 642
 643         idx = srcu_read_lock(&vcpu->kvm->srcu);
 644
 645 again:
 646         if (signal_pending(current)) {
 647                 r = -EINTR;
 648                 kvm_run->exit_reason = KVM_EXIT_INTR;
 649                 goto out;
 650         }
 651
 652         preempt_disable();
 653         local_irq_disable();
 654
 655         /*Get host and guest context with guest address space.*/
 656         host_ctx = kvm_get_host_context(vcpu);
 657         guest_ctx = kvm_get_guest_context(vcpu);
 658
 659         clear_bit(KVM_REQ_KICK, &vcpu->requests);
 660
 661         r = kvm_vcpu_pre_transition(vcpu);
 662         if (r < 0)
 663                 goto vcpu_run_fail;
 664
 665         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 666         vcpu->mode = IN_GUEST_MODE;
 667         kvm_guest_enter();
 668
 669         /*
 670          * Transition to the guest
 671          */
 672         kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
 673
 674         kvm_vcpu_post_transition(vcpu);
 675
 676         vcpu->arch.launched = 1;
 677         set_bit(KVM_REQ_KICK, &vcpu->requests);
 678         local_irq_enable();
 679
 680         /*
 681          * We must have an instruction between local_irq_enable() and
 682          * kvm_guest_exit(), so the timer interrupt isn't delayed by
 683          * the interrupt shadow.  The stat.exits increment will do nicely.
 684          * But we need to prevent reordering, hence this barrier():
 685          */
 686         barrier();
 687         kvm_guest_exit();
 688         vcpu->mode = OUTSIDE_GUEST_MODE;
 689         preempt_enable();
 690
 691         idx = srcu_read_lock(&vcpu->kvm->srcu);
 692
 693         r = kvm_handle_exit(kvm_run, vcpu);
 694
 695         if (r > 0) {
 696                 if (!need_resched())
 697                         goto again;
 698         }
 699
 700 out:
 701         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 702         if (r > 0) {
 703                 kvm_resched(vcpu);
 704                 idx = srcu_read_lock(&vcpu->kvm->srcu);
 705                 goto again;
 706         }
 707
 708         return r;
 709
 710 vcpu_run_fail:
 711         local_irq_enable();
 712         preempt_enable();
 713         kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
 714         goto out;
 715 }
 716
 717 static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
 718 {
 719         struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
 720
 721         if (!vcpu->mmio_is_write)
 722                 memcpy(&p->data, vcpu->mmio_data, 8);
 723         p->state = STATE_IORESP_READY;
 724 }
 725
 726 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 727 {
 728         int r;
 729         sigset_t sigsaved;
 730
 731         if (vcpu->sigset_active)
 732                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 733
 734         if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
 735                 kvm_vcpu_block(vcpu);
 736                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 737                 r = -EAGAIN;
 738                 goto out;
 739         }
 740
 741         if (vcpu->mmio_needed) {
 742                 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
 743                 kvm_set_mmio_data(vcpu);
 744                 vcpu->mmio_read_completed = 1;
 745                 vcpu->mmio_needed = 0;
 746         }
 747         r = __vcpu_run(vcpu, kvm_run);
 748 out:
 749         if (vcpu->sigset_active)
 750                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 751
 752         return r;
 753 }
 754
 755 struct kvm *kvm_arch_alloc_vm(void)
 756 {
 757
 758         struct kvm *kvm;
 759         uint64_t  vm_base;
 760
 761         BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
 762
 763         vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
 764
 765         if (!vm_base)
 766                 return NULL;
 767
 768         memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
 769         kvm = (struct kvm *)(vm_base +
 770                         offsetof(struct kvm_vm_data, kvm_vm_struct));
 771         kvm->arch.vm_base = vm_base;
 772         printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
 773
 774         return kvm;
 775 }
 776
 777 struct kvm_io_range {
 778         unsigned long start;
 779         unsigned long size;
 780         unsigned long type;
 781 };
 782
 783 static const struct kvm_io_range io_ranges[] = {
 784         {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
 785         {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
 786         {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
 787         {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
 788         {PIB_START, PIB_SIZE, GPFN_PIB},
 789 };
 790
 791 static void kvm_build_io_pmt(struct kvm *kvm)
 792 {
 793         unsigned long i, j;
 794
 795         /* Mark I/O ranges */
 796         for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
 797                                                         i++) {
 798                 for (j = io_ranges[i].start;
 799                                 j < io_ranges[i].start + io_ranges[i].size;
 800                                 j += PAGE_SIZE)
 801                         kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
 802                                         io_ranges[i].type, 0);
 803         }
 804
 805 }
 806
 807 /*Use unused rids to virtualize guest rid.*/
 808 #define GUEST_PHYSICAL_RR0      0x1739
 809 #define GUEST_PHYSICAL_RR4      0x2739
 810 #define VMM_INIT_RR             0x1660
 811
 812 int kvm_arch_init_vm(struct kvm *kvm)
 813 {
 814         BUG_ON(!kvm);
 815
 816         kvm->arch.is_sn2 = ia64_platform_is("sn2");
 817
 818         kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
 819         kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
 820         kvm->arch.vmm_init_rr = VMM_INIT_RR;
 821
 822         /*
 823          *Fill P2M entries for MMIO/IO ranges
 824          */
 825         kvm_build_io_pmt(kvm);
 826
 827         INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
 828
 829         /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
 830         set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
 831
 832         return 0;
 833 }
 834
 835 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
 836                                         struct kvm_irqchip *chip)
 837 {
 838         int r;
 839
 840         r = 0;
 841         switch (chip->chip_id) {
 842         case KVM_IRQCHIP_IOAPIC:
 843                 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
 844                 break;
 845         default:
 846                 r = -EINVAL;
 847                 break;
 848         }
 849         return r;
 850 }
 851
 852 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
 853 {
 854         int r;
 855
 856         r = 0;
 857         switch (chip->chip_id) {
 858         case KVM_IRQCHIP_IOAPIC:
 859                 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
 860                 break;
 861         default:
 862                 r = -EINVAL;
 863                 break;
 864         }
 865         return r;
 866 }
 867
 868 #define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
 869
 870 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 871 {
 872         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 873         int i;
 874
 875         for (i = 0; i < 16; i++) {
 876                 vpd->vgr[i] = regs->vpd.vgr[i];
 877                 vpd->vbgr[i] = regs->vpd.vbgr[i];
 878         }
 879         for (i = 0; i < 128; i++)
 880                 vpd->vcr[i] = regs->vpd.vcr[i];
 881         vpd->vhpi = regs->vpd.vhpi;
 882         vpd->vnat = regs->vpd.vnat;
 883         vpd->vbnat = regs->vpd.vbnat;
 884         vpd->vpsr = regs->vpd.vpsr;
 885
 886         vpd->vpr = regs->vpd.vpr;
 887
 888         memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
 889
 890         RESTORE_REGS(mp_state);
 891         RESTORE_REGS(vmm_rr);
 892         memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
 893         memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
 894         RESTORE_REGS(itr_regions);
 895         RESTORE_REGS(dtr_regions);
 896         RESTORE_REGS(tc_regions);
 897         RESTORE_REGS(irq_check);
 898         RESTORE_REGS(itc_check);
 899         RESTORE_REGS(timer_check);
 900         RESTORE_REGS(timer_pending);
 901         RESTORE_REGS(last_itc);
 902         for (i = 0; i < 8; i++) {
 903                 vcpu->arch.vrr[i] = regs->vrr[i];
 904                 vcpu->arch.ibr[i] = regs->ibr[i];
 905                 vcpu->arch.dbr[i] = regs->dbr[i];
 906         }
 907         for (i = 0; i < 4; i++)
 908                 vcpu->arch.insvc[i] = regs->insvc[i];
 909         RESTORE_REGS(xtp);
 910         RESTORE_REGS(metaphysical_rr0);
 911         RESTORE_REGS(metaphysical_rr4);
 912         RESTORE_REGS(metaphysical_saved_rr0);
 913         RESTORE_REGS(metaphysical_saved_rr4);
 914         RESTORE_REGS(fp_psr);
 915         RESTORE_REGS(saved_gp);
 916
 917         vcpu->arch.irq_new_pending = 1;
 918         vcpu->arch.itc_offset = regs->saved_itc - kvm_get_itc(vcpu);
 919         set_bit(KVM_REQ_RESUME, &vcpu->requests);
 920
 921         return 0;
 922 }
 923
 924 long kvm_arch_vm_ioctl(struct file *filp,
 925                 unsigned int ioctl, unsigned long arg)
 926 {
 927         struct kvm *kvm = filp->private_data;
 928         void __user *argp = (void __user *)arg;
 929         int r = -ENOTTY;
 930
 931         switch (ioctl) {
 932         case KVM_SET_MEMORY_REGION: {
 933                 struct kvm_memory_region kvm_mem;
 934                 struct kvm_userspace_memory_region kvm_userspace_mem;
 935
 936                 r = -EFAULT;
 937                 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
 938                         goto out;
 939                 kvm_userspace_mem.slot = kvm_mem.slot;
 940                 kvm_userspace_mem.flags = kvm_mem.flags;
 941                 kvm_userspace_mem.guest_phys_addr =
 942                                         kvm_mem.guest_phys_addr;
 943                 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
 944                 r = kvm_vm_ioctl_set_memory_region(kvm,
 945                                         &kvm_userspace_mem, 0);
 946                 if (r)
 947                         goto out;
 948                 break;
 949                 }
 950         case KVM_CREATE_IRQCHIP:
 951                 r = -EFAULT;
 952                 r = kvm_ioapic_init(kvm);
 953                 if (r)
 954                         goto out;
 955                 r = kvm_setup_default_irq_routing(kvm);
 956                 if (r) {
 957                         mutex_lock(&kvm->slots_lock);
 958                         kvm_ioapic_destroy(kvm);
 959                         mutex_unlock(&kvm->slots_lock);
 960                         goto out;
 961                 }
 962                 break;
 963         case KVM_IRQ_LINE_STATUS:
 964         case KVM_IRQ_LINE: {
 965                 struct kvm_irq_level irq_event;
 966
 967                 r = -EFAULT;
 968                 if (copy_from_user(&irq_event, argp, sizeof irq_event))
 969                         goto out;
 970                 r = -ENXIO;
 971                 if (irqchip_in_kernel(kvm)) {
 972                         __s32 status;
 973                         status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
 974                                     irq_event.irq, irq_event.level);
 975                         if (ioctl == KVM_IRQ_LINE_STATUS) {
 976                                 r = -EFAULT;
 977                                 irq_event.status = status;
 978                                 if (copy_to_user(argp, &irq_event,
 979                                                         sizeof irq_event))
 980                                         goto out;
 981                         }
 982                         r = 0;
 983                 }
 984                 break;
 985                 }
 986         case KVM_GET_IRQCHIP: {
 987                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
 988                 struct kvm_irqchip chip;
 989
 990                 r = -EFAULT;
 991                 if (copy_from_user(&chip, argp, sizeof chip))
 992                                 goto out;
 993                 r = -ENXIO;
 994                 if (!irqchip_in_kernel(kvm))
 995                         goto out;
 996                 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
 997                 if (r)
 998                         goto out;
 999                 r = -EFAULT;
1000                 if (copy_to_user(argp, &chip, sizeof chip))
1001                                 goto out;
1002                 r = 0;
1003                 break;
1004                 }
1005         case KVM_SET_IRQCHIP: {
1006                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1007                 struct kvm_irqchip chip;
1008
1009                 r = -EFAULT;
1010                 if (copy_from_user(&chip, argp, sizeof chip))
1011                                 goto out;
1012                 r = -ENXIO;
1013                 if (!irqchip_in_kernel(kvm))
1014                         goto out;
1015                 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1016                 if (r)
1017                         goto out;
1018                 r = 0;
1019                 break;
1020                 }
1021         default:
1022                 ;
1023         }
1024 out:
1025         return r;
1026 }
1027
1028 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1029                 struct kvm_sregs *sregs)
1030 {
1031         return -EINVAL;
1032 }
1033
1034 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1035                 struct kvm_sregs *sregs)
1036 {
1037         return -EINVAL;
1038
1039 }
1040 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1041                 struct kvm_translation *tr)
1042 {
1043
1044         return -EINVAL;
1045 }
1046
1047 static int kvm_alloc_vmm_area(void)
1048 {
1049         if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1050                 kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1051                                 get_order(KVM_VMM_SIZE));
1052                 if (!kvm_vmm_base)
1053                         return -ENOMEM;
1054
1055                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1056                 kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1057
1058                 printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1059                                 kvm_vmm_base, kvm_vm_buffer);
1060         }
1061
1062         return 0;
1063 }
1064
1065 static void kvm_free_vmm_area(void)
1066 {
1067         if (kvm_vmm_base) {
1068                 /*Zero this area before free to avoid bits leak!!*/
1069                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1070                 free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1071                 kvm_vmm_base  = 0;
1072                 kvm_vm_buffer = 0;
1073                 kvm_vsa_base = 0;
1074         }
1075 }
1076
1077 static int vti_init_vpd(struct kvm_vcpu *vcpu)
1078 {
1079         int i;
1080         union cpuid3_t cpuid3;
1081         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1082
1083         if (IS_ERR(vpd))
1084                 return PTR_ERR(vpd);
1085
1086         /* CPUID init */
1087         for (i = 0; i < 5; i++)
1088                 vpd->vcpuid[i] = ia64_get_cpuid(i);
1089
1090         /* Limit the CPUID number to 5 */
1091         cpuid3.value = vpd->vcpuid[3];
1092         cpuid3.number = 4;      /* 5 - 1 */
1093         vpd->vcpuid[3] = cpuid3.value;
1094
1095         /*Set vac and vdc fields*/
1096         vpd->vac.a_from_int_cr = 1;
1097         vpd->vac.a_to_int_cr = 1;
1098         vpd->vac.a_from_psr = 1;
1099         vpd->vac.a_from_cpuid = 1;
1100         vpd->vac.a_cover = 1;
1101         vpd->vac.a_bsw = 1;
1102         vpd->vac.a_int = 1;
1103         vpd->vdc.d_vmsw = 1;
1104
1105         /*Set virtual buffer*/
1106         vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
1107
1108         return 0;
1109 }
1110
1111 static int vti_create_vp(struct kvm_vcpu *vcpu)
1112 {
1113         long ret;
1114         struct vpd *vpd = vcpu->arch.vpd;
1115         unsigned long  vmm_ivt;
1116
1117         vmm_ivt = kvm_vmm_info->vmm_ivt;
1118
1119         printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
1120
1121         ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
1122
1123         if (ret) {
1124                 printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
1125                 return -EINVAL;
1126         }
1127         return 0;
1128 }
1129
1130 static void init_ptce_info(struct kvm_vcpu *vcpu)
1131 {
1132         ia64_ptce_info_t ptce = {0};
1133
1134         ia64_get_ptce(&ptce);
1135         vcpu->arch.ptce_base = ptce.base;
1136         vcpu->arch.ptce_count[0] = ptce.count[0];
1137         vcpu->arch.ptce_count[1] = ptce.count[1];
1138         vcpu->arch.ptce_stride[0] = ptce.stride[0];
1139         vcpu->arch.ptce_stride[1] = ptce.stride[1];
1140 }
1141
1142 static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
1143 {
1144         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
1145
1146         if (hrtimer_cancel(p_ht))
1147                 hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
1148 }
1149
1150 static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
1151 {
1152         struct kvm_vcpu *vcpu;
1153         wait_queue_head_t *q;
1154
1155         vcpu  = container_of(data, struct kvm_vcpu, arch.hlt_timer);
1156         q = &vcpu->wq;
1157
1158         if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
1159                 goto out;
1160
1161         if (waitqueue_active(q))
1162                 wake_up_interruptible(q);
1163
1164 out:
1165         vcpu->arch.timer_fired = 1;
1166         vcpu->arch.timer_check = 1;
1167         return HRTIMER_NORESTART;
1168 }
1169
1170 #define PALE_RESET_ENTRY    0x80000000ffffffb0UL
1171
1172 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1173 {
1174         struct kvm_vcpu *v;
1175         int r;
1176         int i;
1177         long itc_offset;
1178         struct kvm *kvm = vcpu->kvm;
1179         struct kvm_pt_regs *regs = vcpu_regs(vcpu);
1180
1181         union context *p_ctx = &vcpu->arch.guest;
1182         struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
1183
1184         /*Init vcpu context for first run.*/
1185         if (IS_ERR(vmm_vcpu))
1186                 return PTR_ERR(vmm_vcpu);
1187
1188         if (kvm_vcpu_is_bsp(vcpu)) {
1189                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1190
1191                 /*Set entry address for first run.*/
1192                 regs->cr_iip = PALE_RESET_ENTRY;
1193
1194                 /*Initialize itc offset for vcpus*/
1195                 itc_offset = 0UL - kvm_get_itc(vcpu);
1196                 for (i = 0; i < KVM_MAX_VCPUS; i++) {
1197                         v = (struct kvm_vcpu *)((char *)vcpu +
1198                                         sizeof(struct kvm_vcpu_data) * i);
1199                         v->arch.itc_offset = itc_offset;
1200                         v->arch.last_itc = 0;
1201                 }
1202         } else
1203                 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
1204
1205         r = -ENOMEM;
1206         vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
1207         if (!vcpu->arch.apic)
1208                 goto out;
1209         vcpu->arch.apic->vcpu = vcpu;
1210
1211         p_ctx->gr[1] = 0;
1212         p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + KVM_STK_OFFSET);
1213         p_ctx->gr[13] = (unsigned long)vmm_vcpu;
1214         p_ctx->psr = 0x1008522000UL;
1215         p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
1216         p_ctx->caller_unat = 0;
1217         p_ctx->pr = 0x0;
1218         p_ctx->ar[36] = 0x0; /*unat*/
1219         p_ctx->ar[19] = 0x0; /*rnat*/
1220         p_ctx->ar[18] = (unsigned long)vmm_vcpu +
1221                                 ((sizeof(struct kvm_vcpu)+15) & ~15);
1222         p_ctx->ar[64] = 0x0; /*pfs*/
1223         p_ctx->cr[0] = 0x7e04UL;
1224         p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
1225         p_ctx->cr[8] = 0x3c;
1226
1227         /*Initialize region register*/
1228         p_ctx->rr[0] = 0x30;
1229         p_ctx->rr[1] = 0x30;
1230         p_ctx->rr[2] = 0x30;
1231         p_ctx->rr[3] = 0x30;
1232         p_ctx->rr[4] = 0x30;
1233         p_ctx->rr[5] = 0x30;
1234         p_ctx->rr[7] = 0x30;
1235
1236         /*Initialize branch register 0*/
1237         p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
1238
1239         vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
1240         vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
1241         vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
1242
1243         hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
1244         vcpu->arch.hlt_timer.function = hlt_timer_fn;
1245
1246         vcpu->arch.last_run_cpu = -1;
1247         vcpu->arch.vpd = (struct vpd *)VPD_BASE(vcpu->vcpu_id);
1248         vcpu->arch.vsa_base = kvm_vsa_base;
1249         vcpu->arch.__gp = kvm_vmm_gp;
1250         vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
1251         vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_BASE(vcpu->vcpu_id);
1252         vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(vcpu->vcpu_id);
1253         init_ptce_info(vcpu);
1254
1255         r = 0;
1256 out:
1257         return r;
1258 }
1259
1260 static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
1261 {
1262         unsigned long psr;
1263         int r;
1264
1265         local_irq_save(psr);
1266         r = kvm_insert_vmm_mapping(vcpu);
1267         local_irq_restore(psr);
1268         if (r)
1269                 goto fail;
1270         r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1271         if (r)
1272                 goto fail;
1273
1274         r = vti_init_vpd(vcpu);
1275         if (r) {
1276                 printk(KERN_DEBUG"kvm: vpd init error!!\n");
1277                 goto uninit;
1278         }
1279
1280         r = vti_create_vp(vcpu);
1281         if (r)
1282                 goto uninit;
1283
1284         kvm_purge_vmm_mapping(vcpu);
1285
1286         return 0;
1287 uninit:
1288         kvm_vcpu_uninit(vcpu);
1289 fail:
1290         return r;
1291 }
1292
1293 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1294                 unsigned int id)
1295 {
1296         struct kvm_vcpu *vcpu;
1297         unsigned long vm_base = kvm->arch.vm_base;
1298         int r;
1299         int cpu;
1300
1301         BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
1302
1303         r = -EINVAL;
1304         if (id >= KVM_MAX_VCPUS) {
1305                 printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
1306                                 KVM_MAX_VCPUS);
1307                 goto fail;
1308         }
1309
1310         r = -ENOMEM;
1311         if (!vm_base) {
1312                 printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1313                 goto fail;
1314         }
1315         vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
1316                                         vcpu_data[id].vcpu_struct));
1317         vcpu->kvm = kvm;
1318
1319         cpu = get_cpu();
1320         r = vti_vcpu_setup(vcpu, id);
1321         put_cpu();
1322
1323         if (r) {
1324                 printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1325                 goto fail;
1326         }
1327
1328         return vcpu;
1329 fail:
1330         return ERR_PTR(r);
1331 }
1332
1333 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1334 {
1335         return 0;
1336 }
1337
1338 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1339 {
1340         return -EINVAL;
1341 }
1342
1343 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1344 {
1345         return -EINVAL;
1346 }
1347
1348 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1349                                         struct kvm_guest_debug *dbg)
1350 {
1351         return -EINVAL;
1352 }
1353
1354 void kvm_arch_free_vm(struct kvm *kvm)
1355 {
1356         unsigned long vm_base = kvm->arch.vm_base;
1357
1358         if (vm_base) {
1359                 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1360                 free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1361         }
1362
1363 }
1364
1365 static void kvm_release_vm_pages(struct kvm *kvm)
1366 {
1367         struct kvm_memslots *slots;
1368         struct kvm_memory_slot *memslot;
1369         int i, j;
1370         unsigned long base_gfn;
1371
1372         slots = kvm_memslots(kvm);
1373         for (i = 0; i < slots->nmemslots; i++) {
1374                 memslot = &slots->memslots[i];
1375                 base_gfn = memslot->base_gfn;
1376
1377                 for (j = 0; j < memslot->npages; j++) {
1378                         if (memslot->rmap[j])
1379                                 put_page((struct page *)memslot->rmap[j]);
1380                 }
1381         }
1382 }
1383
1384 void kvm_arch_sync_events(struct kvm *kvm)
1385 {
1386 }
1387
1388 void kvm_arch_destroy_vm(struct kvm *kvm)
1389 {
1390         kvm_iommu_unmap_guest(kvm);
1391 #ifdef  KVM_CAP_DEVICE_ASSIGNMENT
1392         kvm_free_all_assigned_devices(kvm);
1393 #endif
1394         kfree(kvm->arch.vioapic);
1395         kvm_release_vm_pages(kvm);
1396 }
1397
1398 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1399 {
1400 }
1401
1402 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1403 {
1404         if (cpu != vcpu->cpu) {
1405                 vcpu->cpu = cpu;
1406                 if (vcpu->arch.ht_active)
1407                         kvm_migrate_hlt_timer(vcpu);
1408         }
1409 }
1410
1411 #define SAVE_REGS(_x)   regs->_x = vcpu->arch._x
1412
1413 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1414 {
1415         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1416         int i;
1417
1418         vcpu_load(vcpu);
1419
1420         for (i = 0; i < 16; i++) {
1421                 regs->vpd.vgr[i] = vpd->vgr[i];
1422                 regs->vpd.vbgr[i] = vpd->vbgr[i];
1423         }
1424         for (i = 0; i < 128; i++)
1425                 regs->vpd.vcr[i] = vpd->vcr[i];
1426         regs->vpd.vhpi = vpd->vhpi;
1427         regs->vpd.vnat = vpd->vnat;
1428         regs->vpd.vbnat = vpd->vbnat;
1429         regs->vpd.vpsr = vpd->vpsr;
1430         regs->vpd.vpr = vpd->vpr;
1431
1432         memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
1433
1434         SAVE_REGS(mp_state);
1435         SAVE_REGS(vmm_rr);
1436         memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1437         memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1438         SAVE_REGS(itr_regions);
1439         SAVE_REGS(dtr_regions);
1440         SAVE_REGS(tc_regions);
1441         SAVE_REGS(irq_check);
1442         SAVE_REGS(itc_check);
1443         SAVE_REGS(timer_check);
1444         SAVE_REGS(timer_pending);
1445         SAVE_REGS(last_itc);
1446         for (i = 0; i < 8; i++) {
1447                 regs->vrr[i] = vcpu->arch.vrr[i];
1448                 regs->ibr[i] = vcpu->arch.ibr[i];
1449                 regs->dbr[i] = vcpu->arch.dbr[i];
1450         }
1451         for (i = 0; i < 4; i++)
1452                 regs->insvc[i] = vcpu->arch.insvc[i];
1453         regs->saved_itc = vcpu->arch.itc_offset + kvm_get_itc(vcpu);
1454         SAVE_REGS(xtp);
1455         SAVE_REGS(metaphysical_rr0);
1456         SAVE_REGS(metaphysical_rr4);
1457         SAVE_REGS(metaphysical_saved_rr0);
1458         SAVE_REGS(metaphysical_saved_rr4);
1459         SAVE_REGS(fp_psr);
1460         SAVE_REGS(saved_gp);
1461
1462         vcpu_put(vcpu);
1463         return 0;
1464 }
1465
1466 int kvm_arch_vcpu_ioctl_get_stack(struct kvm_vcpu *vcpu,
1467                                   struct kvm_ia64_vcpu_stack *stack)
1468 {
1469         memcpy(stack, vcpu, sizeof(struct kvm_ia64_vcpu_stack));
1470         return 0;
1471 }
1472
1473 int kvm_arch_vcpu_ioctl_set_stack(struct kvm_vcpu *vcpu,
1474                                   struct kvm_ia64_vcpu_stack *stack)
1475 {
1476         memcpy(vcpu + 1, &stack->stack[0] + sizeof(struct kvm_vcpu),
1477                sizeof(struct kvm_ia64_vcpu_stack) - sizeof(struct kvm_vcpu));
1478
1479         vcpu->arch.exit_data = ((struct kvm_vcpu *)stack)->arch.exit_data;
1480         return 0;
1481 }
1482
1483 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1484 {
1485
1486         hrtimer_cancel(&vcpu->arch.hlt_timer);
1487         kfree(vcpu->arch.apic);
1488 }
1489
1490
1491 long kvm_arch_vcpu_ioctl(struct file *filp,
1492                          unsigned int ioctl, unsigned long arg)
1493 {
1494         struct kvm_vcpu *vcpu = filp->private_data;
1495         void __user *argp = (void __user *)arg;
1496         struct kvm_ia64_vcpu_stack *stack = NULL;
1497         long r;
1498
1499         switch (ioctl) {
1500         case KVM_IA64_VCPU_GET_STACK: {
1501                 struct kvm_ia64_vcpu_stack __user *user_stack;
1502                 void __user *first_p = argp;
1503
1504                 r = -EFAULT;
1505                 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1506                         goto out;
1507
1508                 if (!access_ok(VERIFY_WRITE, user_stack,
1509                                sizeof(struct kvm_ia64_vcpu_stack))) {
1510                         printk(KERN_INFO "KVM_IA64_VCPU_GET_STACK: "
1511                                "Illegal user destination address for stack\n");
1512                         goto out;
1513                 }
1514                 stack = kzalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1515                 if (!stack) {
1516                         r = -ENOMEM;
1517                         goto out;
1518                 }
1519
1520                 r = kvm_arch_vcpu_ioctl_get_stack(vcpu, stack);
1521                 if (r)
1522                         goto out;
1523
1524                 if (copy_to_user(user_stack, stack,
1525                                  sizeof(struct kvm_ia64_vcpu_stack))) {
1526                         r = -EFAULT;
1527                         goto out;
1528                 }
1529
1530                 break;
1531         }
1532         case KVM_IA64_VCPU_SET_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_READ, user_stack,
1541                             sizeof(struct kvm_ia64_vcpu_stack))) {
1542                         printk(KERN_INFO "KVM_IA64_VCPU_SET_STACK: "
1543                                "Illegal user address for stack\n");
1544                         goto out;
1545                 }
1546                 stack = kmalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1547                 if (!stack) {
1548                         r = -ENOMEM;
1549                         goto out;
1550                 }
1551                 if (copy_from_user(stack, user_stack,
1552                                    sizeof(struct kvm_ia64_vcpu_stack)))
1553                         goto out;
1554
1555                 r = kvm_arch_vcpu_ioctl_set_stack(vcpu, stack);
1556                 break;
1557         }
1558
1559         default:
1560                 r = -EINVAL;
1561         }
1562
1563 out:
1564         kfree(stack);
1565         return r;
1566 }
1567
1568 int kvm_arch_prepare_memory_region(struct kvm *kvm,
1569                 struct kvm_memory_slot *memslot,
1570                 struct kvm_memory_slot old,
1571                 struct kvm_userspace_memory_region *mem,
1572                 int user_alloc)
1573 {
1574         unsigned long i;
1575         unsigned long pfn;
1576         int npages = memslot->npages;
1577         unsigned long base_gfn = memslot->base_gfn;
1578
1579         if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
1580                 return -ENOMEM;
1581
1582         for (i = 0; i < npages; i++) {
1583                 pfn = gfn_to_pfn(kvm, base_gfn + i);
1584                 if (!kvm_is_mmio_pfn(pfn)) {
1585                         kvm_set_pmt_entry(kvm, base_gfn + i,
1586                                         pfn << PAGE_SHIFT,
1587                                 _PAGE_AR_RWX | _PAGE_MA_WB);
1588                         memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1589                 } else {
1590                         kvm_set_pmt_entry(kvm, base_gfn + i,
1591                                         GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1592                                         _PAGE_MA_UC);
1593                         memslot->rmap[i] = 0;
1594                         }
1595         }
1596
1597         return 0;
1598 }
1599
1600 void kvm_arch_commit_memory_region(struct kvm *kvm,
1601                 struct kvm_userspace_memory_region *mem,
1602                 struct kvm_memory_slot old,
1603                 int user_alloc)
1604 {
1605         return;
1606 }
1607
1608 void kvm_arch_flush_shadow(struct kvm *kvm)
1609 {
1610         kvm_flush_remote_tlbs(kvm);
1611 }
1612
1613 long kvm_arch_dev_ioctl(struct file *filp,
1614                         unsigned int ioctl, unsigned long arg)
1615 {
1616         return -EINVAL;
1617 }
1618
1619 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1620 {
1621         kvm_vcpu_uninit(vcpu);
1622 }
1623
1624 static int vti_cpu_has_kvm_support(void)
1625 {
1626         long  avail = 1, status = 1, control = 1;
1627         long ret;
1628
1629         ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1630         if (ret)
1631                 goto out;
1632
1633         if (!(avail & PAL_PROC_VM_BIT))
1634                 goto out;
1635
1636         printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1637
1638         ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1639         if (ret)
1640                 goto out;
1641         printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1642
1643         if (!(vp_env_info & VP_OPCODE)) {
1644                 printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1645                                 "vm_env_info:0x%lx\n", vp_env_info);
1646         }
1647
1648         return 1;
1649 out:
1650         return 0;
1651 }
1652
1653
1654 /*
1655  * On SN2, the ITC isn't stable, so copy in fast path code to use the
1656  * SN2 RTC, replacing the ITC based default verion.
1657  */
1658 static void kvm_patch_vmm(struct kvm_vmm_info *vmm_info,
1659                           struct module *module)
1660 {
1661         unsigned long new_ar, new_ar_sn2;
1662         unsigned long module_base;
1663
1664         if (!ia64_platform_is("sn2"))
1665                 return;
1666
1667         module_base = (unsigned long)module->module_core;
1668
1669         new_ar = kvm_vmm_base + vmm_info->patch_mov_ar - module_base;
1670         new_ar_sn2 = kvm_vmm_base + vmm_info->patch_mov_ar_sn2 - module_base;
1671
1672         printk(KERN_INFO "kvm: Patching ITC emulation to use SGI SN2 RTC "
1673                "as source\n");
1674
1675         /*
1676          * Copy the SN2 version of mov_ar into place. They are both
1677          * the same size, so 6 bundles is sufficient (6 * 0x10).
1678          */
1679         memcpy((void *)new_ar, (void *)new_ar_sn2, 0x60);
1680 }
1681
1682 static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1683                             struct module *module)
1684 {
1685         unsigned long module_base;
1686         unsigned long vmm_size;
1687
1688         unsigned long vmm_offset, func_offset, fdesc_offset;
1689         struct fdesc *p_fdesc;
1690
1691         BUG_ON(!module);
1692
1693         if (!kvm_vmm_base) {
1694                 printk("kvm: kvm area hasn't been initialized yet!!\n");
1695                 return -EFAULT;
1696         }
1697
1698         /*Calculate new position of relocated vmm module.*/
1699         module_base = (unsigned long)module->module_core;
1700         vmm_size = module->core_size;
1701         if (unlikely(vmm_size > KVM_VMM_SIZE))
1702                 return -EFAULT;
1703
1704         memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1705         kvm_patch_vmm(vmm_info, module);
1706         kvm_flush_icache(kvm_vmm_base, vmm_size);
1707
1708         /*Recalculate kvm_vmm_info based on new VMM*/
1709         vmm_offset = vmm_info->vmm_ivt - module_base;
1710         kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1711         printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1712                         kvm_vmm_info->vmm_ivt);
1713
1714         fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1715         kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1716                                                         fdesc_offset);
1717         func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1718         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1719         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1720         p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1721
1722         printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1723                         KVM_VMM_BASE+func_offset);
1724
1725         fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1726         kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1727                         fdesc_offset);
1728         func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1729         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1730         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1731         p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1732
1733         kvm_vmm_gp = p_fdesc->gp;
1734
1735         printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1736                                                 kvm_vmm_info->vmm_entry);
1737         printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1738                                                 KVM_VMM_BASE + func_offset);
1739
1740         return 0;
1741 }
1742
1743 int kvm_arch_init(void *opaque)
1744 {
1745         int r;
1746         struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1747
1748         if (!vti_cpu_has_kvm_support()) {
1749                 printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1750                 r = -EOPNOTSUPP;
1751                 goto out;
1752         }
1753
1754         if (kvm_vmm_info) {
1755                 printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1756                 r = -EEXIST;
1757                 goto out;
1758         }
1759
1760         r = -ENOMEM;
1761         kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1762         if (!kvm_vmm_info)
1763                 goto out;
1764
1765         if (kvm_alloc_vmm_area())
1766                 goto out_free0;
1767
1768         r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1769         if (r)
1770                 goto out_free1;
1771
1772         return 0;
1773
1774 out_free1:
1775         kvm_free_vmm_area();
1776 out_free0:
1777         kfree(kvm_vmm_info);
1778 out:
1779         return r;
1780 }
1781
1782 void kvm_arch_exit(void)
1783 {
1784         kvm_free_vmm_area();
1785         kfree(kvm_vmm_info);
1786         kvm_vmm_info = NULL;
1787 }
1788
1789 static void kvm_ia64_sync_dirty_log(struct kvm *kvm,
1790                                     struct kvm_memory_slot *memslot)
1791 {
1792         int i;
1793         long base;
1794         unsigned long n;
1795         unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
1796                         offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
1797
1798         n = kvm_dirty_bitmap_bytes(memslot);
1799         base = memslot->base_gfn / BITS_PER_LONG;
1800
1801         spin_lock(&kvm->arch.dirty_log_lock);
1802         for (i = 0; i < n/sizeof(long); ++i) {
1803                 memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1804                 dirty_bitmap[base + i] = 0;
1805         }
1806         spin_unlock(&kvm->arch.dirty_log_lock);
1807 }
1808
1809 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1810                 struct kvm_dirty_log *log)
1811 {
1812         int r;
1813         unsigned long n;
1814         struct kvm_memory_slot *memslot;
1815         int is_dirty = 0;
1816
1817         mutex_lock(&kvm->slots_lock);
1818
1819         r = -EINVAL;
1820         if (log->slot >= KVM_MEMORY_SLOTS)
1821                 goto out;
1822
1823         memslot = &kvm->memslots->memslots[log->slot];
1824         r = -ENOENT;
1825         if (!memslot->dirty_bitmap)
1826                 goto out;
1827
1828         kvm_ia64_sync_dirty_log(kvm, memslot);
1829         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1830         if (r)
1831                 goto out;
1832
1833         /* If nothing is dirty, don't bother messing with page tables. */
1834         if (is_dirty) {
1835                 kvm_flush_remote_tlbs(kvm);
1836                 n = kvm_dirty_bitmap_bytes(memslot);
1837                 memset(memslot->dirty_bitmap, 0, n);
1838         }
1839         r = 0;
1840 out:
1841         mutex_unlock(&kvm->slots_lock);
1842         return r;
1843 }
1844
1845 int kvm_arch_hardware_setup(void)
1846 {
1847         return 0;
1848 }
1849
1850 void kvm_arch_hardware_unsetup(void)
1851 {
1852 }
1853
1854 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
1855 {
1856         int me;
1857         int cpu = vcpu->cpu;
1858
1859         if (waitqueue_active(&vcpu->wq))
1860                 wake_up_interruptible(&vcpu->wq);
1861
1862         me = get_cpu();
1863         if (cpu != me && (unsigned) cpu < nr_cpu_ids && cpu_online(cpu))
1864                 if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests))
1865                         smp_send_reschedule(cpu);
1866         put_cpu();
1867 }
1868
1869 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)
1870 {
1871         return __apic_accept_irq(vcpu, irq->vector);
1872 }
1873
1874 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1875 {
1876         return apic->vcpu->vcpu_id == dest;
1877 }
1878
1879 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1880 {
1881         return 0;
1882 }
1883
1884 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
1885 {
1886         return vcpu1->arch.xtp - vcpu2->arch.xtp;
1887 }
1888
1889 int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
1890                 int short_hand, int dest, int dest_mode)
1891 {
1892         struct kvm_lapic *target = vcpu->arch.apic;
1893         return (dest_mode == 0) ?
1894                 kvm_apic_match_physical_addr(target, dest) :
1895                 kvm_apic_match_logical_addr(target, dest);
1896 }
1897
1898 static int find_highest_bits(int *dat)
1899 {
1900         u32  bits, bitnum;
1901         int i;
1902
1903         /* loop for all 256 bits */
1904         for (i = 7; i >= 0 ; i--) {
1905                 bits = dat[i];
1906                 if (bits) {
1907                         bitnum = fls(bits);
1908                         return i * 32 + bitnum - 1;
1909                 }
1910         }
1911
1912         return -1;
1913 }
1914
1915 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1916 {
1917     struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1918
1919     if (vpd->irr[0] & (1UL << NMI_VECTOR))
1920                 return NMI_VECTOR;
1921     if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1922                 return ExtINT_VECTOR;
1923
1924     return find_highest_bits((int *)&vpd->irr[0]);
1925 }
1926
1927 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1928 {
1929         return vcpu->arch.timer_fired;
1930 }
1931
1932 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1933 {
1934         return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) ||
1935                 (kvm_highest_pending_irq(vcpu) != -1);
1936 }
1937
1938 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1939                                     struct kvm_mp_state *mp_state)
1940 {
1941         mp_state->mp_state = vcpu->arch.mp_state;
1942         return 0;
1943 }
1944
1945 static int vcpu_reset(struct kvm_vcpu *vcpu)
1946 {
1947         int r;
1948         long psr;
1949         local_irq_save(psr);
1950         r = kvm_insert_vmm_mapping(vcpu);
1951         local_irq_restore(psr);
1952         if (r)
1953                 goto fail;
1954
1955         vcpu->arch.launched = 0;
1956         kvm_arch_vcpu_uninit(vcpu);
1957         r = kvm_arch_vcpu_init(vcpu);
1958         if (r)
1959                 goto fail;
1960
1961         kvm_purge_vmm_mapping(vcpu);
1962         r = 0;
1963 fail:
1964         return r;
1965 }
1966
1967 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1968                                     struct kvm_mp_state *mp_state)
1969 {
1970         int r = 0;
1971
1972         vcpu->arch.mp_state = mp_state->mp_state;
1973         if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
1974                 r = vcpu_reset(vcpu);
1975         return r;
1976 }