arch/ia64/kvm/kvm-ia64.c

   1 /*
   2  * kvm_ia64.c: Basic KVM suppport On Itanium series processors
   3  *
   4  *
   5  *      Copyright (C) 2007, Intel Corporation.
   6  *      Xiantao Zhang  (xiantao.zhang@intel.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms and conditions of the GNU General Public License,
  10  * version 2, as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  19  * Place - Suite 330, Boston, MA 02111-1307 USA.
  20  *
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/errno.h>
  25 #include <linux/percpu.h>
  26 #include <linux/fs.h>
  27 #include <linux/slab.h>
  28 #include <linux/smp.h>
  29 #include <linux/kvm_host.h>
  30 #include <linux/kvm.h>
  31 #include <linux/bitops.h>
  32 #include <linux/hrtimer.h>
  33 #include <linux/uaccess.h>
  34 #include <linux/iommu.h>
  35 #include <linux/intel-iommu.h>
  36
  37 #include <asm/pgtable.h>
  38 #include <asm/gcc_intrin.h>
  39 #include <asm/pal.h>
  40 #include <asm/cacheflush.h>
  41 #include <asm/div64.h>
  42 #include <asm/tlb.h>
  43 #include <asm/elf.h>
  44 #include <asm/sn/addrs.h>
  45 #include <asm/sn/clksupport.h>
  46 #include <asm/sn/shub_mmr.h>
  47
  48 #include "misc.h"
  49 #include "vti.h"
  50 #include "iodev.h"
  51 #include "ioapic.h"
  52 #include "lapic.h"
  53 #include "irq.h"
  54
  55 static unsigned long kvm_vmm_base;
  56 static unsigned long kvm_vsa_base;
  57 static unsigned long kvm_vm_buffer;
  58 static unsigned long kvm_vm_buffer_size;
  59 unsigned long kvm_vmm_gp;
  60
  61 static long vp_env_info;
  62
  63 static struct kvm_vmm_info *kvm_vmm_info;
  64
  65 static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu);
  66
  67 struct kvm_stats_debugfs_item debugfs_entries[] = {
  68         { NULL }
  69 };
  70
  71 static unsigned long kvm_get_itc(struct kvm_vcpu *vcpu)
  72 {
  73 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
  74         if (vcpu->kvm->arch.is_sn2)
  75                 return rtc_time();
  76         else
  77 #endif
  78                 return ia64_getreg(_IA64_REG_AR_ITC);
  79 }
  80
  81 static void kvm_flush_icache(unsigned long start, unsigned long len)
  82 {
  83         int l;
  84
  85         for (l = 0; l < (len + 32); l += 32)
  86                 ia64_fc((void *)(start + l));
  87
  88         ia64_sync_i();
  89         ia64_srlz_i();
  90 }
  91
  92 static void kvm_flush_tlb_all(void)
  93 {
  94         unsigned long i, j, count0, count1, stride0, stride1, addr;
  95         long flags;
  96
  97         addr    = local_cpu_data->ptce_base;
  98         count0  = local_cpu_data->ptce_count[0];
  99         count1  = local_cpu_data->ptce_count[1];
 100         stride0 = local_cpu_data->ptce_stride[0];
 101         stride1 = local_cpu_data->ptce_stride[1];
 102
 103         local_irq_save(flags);
 104         for (i = 0; i < count0; ++i) {
 105                 for (j = 0; j < count1; ++j) {
 106                         ia64_ptce(addr);
 107                         addr += stride1;
 108                 }
 109                 addr += stride0;
 110         }
 111         local_irq_restore(flags);
 112         ia64_srlz_i();                  /* srlz.i implies srlz.d */
 113 }
 114
 115 long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler)
 116 {
 117         struct ia64_pal_retval iprv;
 118
 119         PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva,
 120                         (u64)opt_handler);
 121
 122         return iprv.status;
 123 }
 124
 125 static  DEFINE_SPINLOCK(vp_lock);
 126
 127 int kvm_arch_hardware_enable(void *garbage)
 128 {
 129         long  status;
 130         long  tmp_base;
 131         unsigned long pte;
 132         unsigned long saved_psr;
 133         int slot;
 134
 135         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
 136         local_irq_save(saved_psr);
 137         slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 138         local_irq_restore(saved_psr);
 139         if (slot < 0)
 140                 return -EINVAL;
 141
 142         spin_lock(&vp_lock);
 143         status = ia64_pal_vp_init_env(kvm_vsa_base ?
 144                                 VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
 145                         __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
 146         if (status != 0) {
 147                 spin_unlock(&vp_lock);
 148                 printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
 149                 return -EINVAL;
 150         }
 151
 152         if (!kvm_vsa_base) {
 153                 kvm_vsa_base = tmp_base;
 154                 printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
 155         }
 156         spin_unlock(&vp_lock);
 157         ia64_ptr_entry(0x3, slot);
 158
 159         return 0;
 160 }
 161
 162 void kvm_arch_hardware_disable(void *garbage)
 163 {
 164
 165         long status;
 166         int slot;
 167         unsigned long pte;
 168         unsigned long saved_psr;
 169         unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
 170
 171         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
 172                                 PAGE_KERNEL));
 173
 174         local_irq_save(saved_psr);
 175         slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 176         local_irq_restore(saved_psr);
 177         if (slot < 0)
 178                 return;
 179
 180         status = ia64_pal_vp_exit_env(host_iva);
 181         if (status)
 182                 printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
 183                                 status);
 184         ia64_ptr_entry(0x3, slot);
 185 }
 186
 187 void kvm_arch_check_processor_compat(void *rtn)
 188 {
 189         *(int *)rtn = 0;
 190 }
 191
 192 int kvm_dev_ioctl_check_extension(long ext)
 193 {
 194
 195         int r;
 196
 197         switch (ext) {
 198         case KVM_CAP_IRQCHIP:
 199         case KVM_CAP_MP_STATE:
 200         case KVM_CAP_IRQ_INJECT_STATUS:
 201                 r = 1;
 202                 break;
 203         case KVM_CAP_COALESCED_MMIO:
 204                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 205                 break;
 206         case KVM_CAP_IOMMU:
 207                 r = iommu_found();
 208                 break;
 209         default:
 210                 r = 0;
 211         }
 212         return r;
 213
 214 }
 215
 216 static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 217 {
 218         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 219         kvm_run->hw.hardware_exit_reason = 1;
 220         return 0;
 221 }
 222
 223 static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 224 {
 225         struct kvm_mmio_req *p;
 226         struct kvm_io_device *mmio_dev;
 227         int r;
 228
 229         p = kvm_get_vcpu_ioreq(vcpu);
 230
 231         if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS)
 232                 goto mmio;
 233         vcpu->mmio_needed = 1;
 234         vcpu->mmio_phys_addr = kvm_run->mmio.phys_addr = p->addr;
 235         vcpu->mmio_size = kvm_run->mmio.len = p->size;
 236         vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir;
 237
 238         if (vcpu->mmio_is_write)
 239                 memcpy(vcpu->mmio_data, &p->data, p->size);
 240         memcpy(kvm_run->mmio.data, &p->data, p->size);
 241         kvm_run->exit_reason = KVM_EXIT_MMIO;
 242         return 0;
 243 mmio:
 244         if (p->dir)
 245                 r = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, p->addr,
 246                                     p->size, &p->data);
 247         else
 248                 r = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, p->addr,
 249                                      p->size, &p->data);
 250         if (r)
 251                 printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr);
 252         p->state = STATE_IORESP_READY;
 253
 254         return 1;
 255 }
 256
 257 static int handle_pal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 258 {
 259         struct exit_ctl_data *p;
 260
 261         p = kvm_get_exit_data(vcpu);
 262
 263         if (p->exit_reason == EXIT_REASON_PAL_CALL)
 264                 return kvm_pal_emul(vcpu, kvm_run);
 265         else {
 266                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 267                 kvm_run->hw.hardware_exit_reason = 2;
 268                 return 0;
 269         }
 270 }
 271
 272 static int handle_sal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 273 {
 274         struct exit_ctl_data *p;
 275
 276         p = kvm_get_exit_data(vcpu);
 277
 278         if (p->exit_reason == EXIT_REASON_SAL_CALL) {
 279                 kvm_sal_emul(vcpu);
 280                 return 1;
 281         } else {
 282                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 283                 kvm_run->hw.hardware_exit_reason = 3;
 284                 return 0;
 285         }
 286
 287 }
 288
 289 static int __apic_accept_irq(struct kvm_vcpu *vcpu, uint64_t vector)
 290 {
 291         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 292
 293         if (!test_and_set_bit(vector, &vpd->irr[0])) {
 294                 vcpu->arch.irq_new_pending = 1;
 295                 kvm_vcpu_kick(vcpu);
 296                 return 1;
 297         }
 298         return 0;
 299 }
 300
 301 /*
 302  *  offset: address offset to IPI space.
 303  *  value:  deliver value.
 304  */
 305 static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm,
 306                                 uint64_t vector)
 307 {
 308         switch (dm) {
 309         case SAPIC_FIXED:
 310                 break;
 311         case SAPIC_NMI:
 312                 vector = 2;
 313                 break;
 314         case SAPIC_EXTINT:
 315                 vector = 0;
 316                 break;
 317         case SAPIC_INIT:
 318         case SAPIC_PMI:
 319         default:
 320                 printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n");
 321                 return;
 322         }
 323         __apic_accept_irq(vcpu, vector);
 324 }
 325
 326 static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id,
 327                         unsigned long eid)
 328 {
 329         union ia64_lid lid;
 330         int i;
 331         struct kvm_vcpu *vcpu;
 332
 333         kvm_for_each_vcpu(i, vcpu, kvm) {
 334                 lid.val = VCPU_LID(vcpu);
 335                 if (lid.id == id && lid.eid == eid)
 336                         return vcpu;
 337         }
 338
 339         return NULL;
 340 }
 341
 342 static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 343 {
 344         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 345         struct kvm_vcpu *target_vcpu;
 346         struct kvm_pt_regs *regs;
 347         union ia64_ipi_a addr = p->u.ipi_data.addr;
 348         union ia64_ipi_d data = p->u.ipi_data.data;
 349
 350         target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid);
 351         if (!target_vcpu)
 352                 return handle_vm_error(vcpu, kvm_run);
 353
 354         if (!target_vcpu->arch.launched) {
 355                 regs = vcpu_regs(target_vcpu);
 356
 357                 regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip;
 358                 regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp;
 359
 360                 target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 361                 if (waitqueue_active(&target_vcpu->wq))
 362                         wake_up_interruptible(&target_vcpu->wq);
 363         } else {
 364                 vcpu_deliver_ipi(target_vcpu, data.dm, data.vector);
 365                 if (target_vcpu != vcpu)
 366                         kvm_vcpu_kick(target_vcpu);
 367         }
 368
 369         return 1;
 370 }
 371
 372 struct call_data {
 373         struct kvm_ptc_g ptc_g_data;
 374         struct kvm_vcpu *vcpu;
 375 };
 376
 377 static void vcpu_global_purge(void *info)
 378 {
 379         struct call_data *p = (struct call_data *)info;
 380         struct kvm_vcpu *vcpu = p->vcpu;
 381
 382         if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
 383                 return;
 384
 385         set_bit(KVM_REQ_PTC_G, &vcpu->requests);
 386         if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) {
 387                 vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] =
 388                                                         p->ptc_g_data;
 389         } else {
 390                 clear_bit(KVM_REQ_PTC_G, &vcpu->requests);
 391                 vcpu->arch.ptc_g_count = 0;
 392                 set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
 393         }
 394 }
 395
 396 static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 397 {
 398         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 399         struct kvm *kvm = vcpu->kvm;
 400         struct call_data call_data;
 401         int i;
 402         struct kvm_vcpu *vcpui;
 403
 404         call_data.ptc_g_data = p->u.ptc_g_data;
 405
 406         kvm_for_each_vcpu(i, vcpui, kvm) {
 407                 if (vcpui->arch.mp_state == KVM_MP_STATE_UNINITIALIZED ||
 408                                 vcpu == vcpui)
 409                         continue;
 410
 411                 if (waitqueue_active(&vcpui->wq))
 412                         wake_up_interruptible(&vcpui->wq);
 413
 414                 if (vcpui->cpu != -1) {
 415                         call_data.vcpu = vcpui;
 416                         smp_call_function_single(vcpui->cpu,
 417                                         vcpu_global_purge, &call_data, 1);
 418                 } else
 419                         printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
 420
 421         }
 422         return 1;
 423 }
 424
 425 static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 426 {
 427         return 1;
 428 }
 429
 430 static int kvm_sn2_setup_mappings(struct kvm_vcpu *vcpu)
 431 {
 432         unsigned long pte, rtc_phys_addr, map_addr;
 433         int slot;
 434
 435         map_addr = KVM_VMM_BASE + (1UL << KVM_VMM_SHIFT);
 436         rtc_phys_addr = LOCAL_MMR_OFFSET | SH_RTC;
 437         pte = pte_val(mk_pte_phys(rtc_phys_addr, PAGE_KERNEL_UC));
 438         slot = ia64_itr_entry(0x3, map_addr, pte, PAGE_SHIFT);
 439         vcpu->arch.sn_rtc_tr_slot = slot;
 440         if (slot < 0) {
 441                 printk(KERN_ERR "Mayday mayday! RTC mapping failed!\n");
 442                 slot = 0;
 443         }
 444         return slot;
 445 }
 446
 447 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
 448 {
 449
 450         ktime_t kt;
 451         long itc_diff;
 452         unsigned long vcpu_now_itc;
 453         unsigned long expires;
 454         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
 455         unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
 456         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 457
 458         if (irqchip_in_kernel(vcpu->kvm)) {
 459
 460                 vcpu_now_itc = kvm_get_itc(vcpu) + vcpu->arch.itc_offset;
 461
 462                 if (time_after(vcpu_now_itc, vpd->itm)) {
 463                         vcpu->arch.timer_check = 1;
 464                         return 1;
 465                 }
 466                 itc_diff = vpd->itm - vcpu_now_itc;
 467                 if (itc_diff < 0)
 468                         itc_diff = -itc_diff;
 469
 470                 expires = div64_u64(itc_diff, cyc_per_usec);
 471                 kt = ktime_set(0, 1000 * expires);
 472
 473                 vcpu->arch.ht_active = 1;
 474                 hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
 475
 476                 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
 477                 kvm_vcpu_block(vcpu);
 478                 hrtimer_cancel(p_ht);
 479                 vcpu->arch.ht_active = 0;
 480
 481                 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests) ||
 482                                 kvm_cpu_has_pending_timer(vcpu))
 483                         if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
 484                                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 485
 486                 if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
 487                         return -EINTR;
 488                 return 1;
 489         } else {
 490                 printk(KERN_ERR"kvm: Unsupported userspace halt!");
 491                 return 0;
 492         }
 493 }
 494
 495 static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
 496                 struct kvm_run *kvm_run)
 497 {
 498         kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
 499         return 0;
 500 }
 501
 502 static int handle_external_interrupt(struct kvm_vcpu *vcpu,
 503                 struct kvm_run *kvm_run)
 504 {
 505         return 1;
 506 }
 507
 508 static int handle_vcpu_debug(struct kvm_vcpu *vcpu,
 509                                 struct kvm_run *kvm_run)
 510 {
 511         printk("VMM: %s", vcpu->arch.log_buf);
 512         return 1;
 513 }
 514
 515 static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
 516                 struct kvm_run *kvm_run) = {
 517         [EXIT_REASON_VM_PANIC]              = handle_vm_error,
 518         [EXIT_REASON_MMIO_INSTRUCTION]      = handle_mmio,
 519         [EXIT_REASON_PAL_CALL]              = handle_pal_call,
 520         [EXIT_REASON_SAL_CALL]              = handle_sal_call,
 521         [EXIT_REASON_SWITCH_RR6]            = handle_switch_rr6,
 522         [EXIT_REASON_VM_DESTROY]            = handle_vm_shutdown,
 523         [EXIT_REASON_EXTERNAL_INTERRUPT]    = handle_external_interrupt,
 524         [EXIT_REASON_IPI]                   = handle_ipi,
 525         [EXIT_REASON_PTC_G]                 = handle_global_purge,
 526         [EXIT_REASON_DEBUG]                 = handle_vcpu_debug,
 527
 528 };
 529
 530 static const int kvm_vti_max_exit_handlers =
 531                 sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
 532
 533 static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
 534 {
 535         struct exit_ctl_data *p_exit_data;
 536
 537         p_exit_data = kvm_get_exit_data(vcpu);
 538         return p_exit_data->exit_reason;
 539 }
 540
 541 /*
 542  * The guest has exited.  See if we can fix it or if we need userspace
 543  * assistance.
 544  */
 545 static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 546 {
 547         u32 exit_reason = kvm_get_exit_reason(vcpu);
 548         vcpu->arch.last_exit = exit_reason;
 549
 550         if (exit_reason < kvm_vti_max_exit_handlers
 551                         && kvm_vti_exit_handlers[exit_reason])
 552                 return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
 553         else {
 554                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 555                 kvm_run->hw.hardware_exit_reason = exit_reason;
 556         }
 557         return 0;
 558 }
 559
 560 static inline void vti_set_rr6(unsigned long rr6)
 561 {
 562         ia64_set_rr(RR6, rr6);
 563         ia64_srlz_i();
 564 }
 565
 566 static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
 567 {
 568         unsigned long pte;
 569         struct kvm *kvm = vcpu->kvm;
 570         int r;
 571
 572         /*Insert a pair of tr to map vmm*/
 573         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
 574         r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 575         if (r < 0)
 576                 goto out;
 577         vcpu->arch.vmm_tr_slot = r;
 578         /*Insert a pairt of tr to map data of vm*/
 579         pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
 580         r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
 581                                         pte, KVM_VM_DATA_SHIFT);
 582         if (r < 0)
 583                 goto out;
 584         vcpu->arch.vm_tr_slot = r;
 585
 586 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 587         if (kvm->arch.is_sn2) {
 588                 r = kvm_sn2_setup_mappings(vcpu);
 589                 if (r < 0)
 590                         goto out;
 591         }
 592 #endif
 593
 594         r = 0;
 595 out:
 596         return r;
 597 }
 598
 599 static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
 600 {
 601         struct kvm *kvm = vcpu->kvm;
 602         ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
 603         ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
 604 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 605         if (kvm->arch.is_sn2)
 606                 ia64_ptr_entry(0x3, vcpu->arch.sn_rtc_tr_slot);
 607 #endif
 608 }
 609
 610 static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
 611 {
 612         unsigned long psr;
 613         int r;
 614         int cpu = smp_processor_id();
 615
 616         if (vcpu->arch.last_run_cpu != cpu ||
 617                         per_cpu(last_vcpu, cpu) != vcpu) {
 618                 per_cpu(last_vcpu, cpu) = vcpu;
 619                 vcpu->arch.last_run_cpu = cpu;
 620                 kvm_flush_tlb_all();
 621         }
 622
 623         vcpu->arch.host_rr6 = ia64_get_rr(RR6);
 624         vti_set_rr6(vcpu->arch.vmm_rr);
 625         local_irq_save(psr);
 626         r = kvm_insert_vmm_mapping(vcpu);
 627         local_irq_restore(psr);
 628         return r;
 629 }
 630
 631 static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
 632 {
 633         kvm_purge_vmm_mapping(vcpu);
 634         vti_set_rr6(vcpu->arch.host_rr6);
 635 }
 636
 637 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 638 {
 639         union context *host_ctx, *guest_ctx;
 640         int r, idx;
 641
 642         idx = srcu_read_lock(&vcpu->kvm->srcu);
 643
 644 again:
 645         if (signal_pending(current)) {
 646                 r = -EINTR;
 647                 kvm_run->exit_reason = KVM_EXIT_INTR;
 648                 goto out;
 649         }
 650
 651         preempt_disable();
 652         local_irq_disable();
 653
 654         /*Get host and guest context with guest address space.*/
 655         host_ctx = kvm_get_host_context(vcpu);
 656         guest_ctx = kvm_get_guest_context(vcpu);
 657
 658         clear_bit(KVM_REQ_KICK, &vcpu->requests);
 659
 660         r = kvm_vcpu_pre_transition(vcpu);
 661         if (r < 0)
 662                 goto vcpu_run_fail;
 663
 664         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 665         kvm_guest_enter();
 666
 667         /*
 668          * Transition to the guest
 669          */
 670         kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
 671
 672         kvm_vcpu_post_transition(vcpu);
 673
 674         vcpu->arch.launched = 1;
 675         set_bit(KVM_REQ_KICK, &vcpu->requests);
 676         local_irq_enable();
 677
 678         /*
 679          * We must have an instruction between local_irq_enable() and
 680          * kvm_guest_exit(), so the timer interrupt isn't delayed by
 681          * the interrupt shadow.  The stat.exits increment will do nicely.
 682          * But we need to prevent reordering, hence this barrier():
 683          */
 684         barrier();
 685         kvm_guest_exit();
 686         preempt_enable();
 687
 688         idx = srcu_read_lock(&vcpu->kvm->srcu);
 689
 690         r = kvm_handle_exit(kvm_run, vcpu);
 691
 692         if (r > 0) {
 693                 if (!need_resched())
 694                         goto again;
 695         }
 696
 697 out:
 698         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 699         if (r > 0) {
 700                 kvm_resched(vcpu);
 701                 idx = srcu_read_lock(&vcpu->kvm->srcu);
 702                 goto again;
 703         }
 704
 705         return r;
 706
 707 vcpu_run_fail:
 708         local_irq_enable();
 709         preempt_enable();
 710         kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
 711         goto out;
 712 }
 713
 714 static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
 715 {
 716         struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
 717
 718         if (!vcpu->mmio_is_write)
 719                 memcpy(&p->data, vcpu->mmio_data, 8);
 720         p->state = STATE_IORESP_READY;
 721 }
 722
 723 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 724 {
 725         int r;
 726         sigset_t sigsaved;
 727
 728         if (vcpu->sigset_active)
 729                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 730
 731         if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
 732                 kvm_vcpu_block(vcpu);
 733                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 734                 r = -EAGAIN;
 735                 goto out;
 736         }
 737
 738         if (vcpu->mmio_needed) {
 739                 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
 740                 kvm_set_mmio_data(vcpu);
 741                 vcpu->mmio_read_completed = 1;
 742                 vcpu->mmio_needed = 0;
 743         }
 744         r = __vcpu_run(vcpu, kvm_run);
 745 out:
 746         if (vcpu->sigset_active)
 747                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 748
 749         return r;
 750 }
 751
 752 static struct kvm *kvm_alloc_kvm(void)
 753 {
 754
 755         struct kvm *kvm;
 756         uint64_t  vm_base;
 757
 758         BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
 759
 760         vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
 761
 762         if (!vm_base)
 763                 return ERR_PTR(-ENOMEM);
 764
 765         memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
 766         kvm = (struct kvm *)(vm_base +
 767                         offsetof(struct kvm_vm_data, kvm_vm_struct));
 768         kvm->arch.vm_base = vm_base;
 769         printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
 770
 771         return kvm;
 772 }
 773
 774 struct kvm_io_range {
 775         unsigned long start;
 776         unsigned long size;
 777         unsigned long type;
 778 };
 779
 780 static const struct kvm_io_range io_ranges[] = {
 781         {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
 782         {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
 783         {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
 784         {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
 785         {PIB_START, PIB_SIZE, GPFN_PIB},
 786 };
 787
 788 static void kvm_build_io_pmt(struct kvm *kvm)
 789 {
 790         unsigned long i, j;
 791
 792         /* Mark I/O ranges */
 793         for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
 794                                                         i++) {
 795                 for (j = io_ranges[i].start;
 796                                 j < io_ranges[i].start + io_ranges[i].size;
 797                                 j += PAGE_SIZE)
 798                         kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
 799                                         io_ranges[i].type, 0);
 800         }
 801
 802 }
 803
 804 /*Use unused rids to virtualize guest rid.*/
 805 #define GUEST_PHYSICAL_RR0      0x1739
 806 #define GUEST_PHYSICAL_RR4      0x2739
 807 #define VMM_INIT_RR             0x1660
 808
 809 static void kvm_init_vm(struct kvm *kvm)
 810 {
 811         BUG_ON(!kvm);
 812
 813         kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
 814         kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
 815         kvm->arch.vmm_init_rr = VMM_INIT_RR;
 816
 817         /*
 818          *Fill P2M entries for MMIO/IO ranges
 819          */
 820         kvm_build_io_pmt(kvm);
 821
 822         INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
 823
 824         /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
 825         set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
 826 }
 827
 828 struct  kvm *kvm_arch_create_vm(void)
 829 {
 830         struct kvm *kvm = kvm_alloc_kvm();
 831
 832         if (IS_ERR(kvm))
 833                 return ERR_PTR(-ENOMEM);
 834
 835         kvm->arch.is_sn2 = ia64_platform_is("sn2");
 836
 837         kvm_init_vm(kvm);
 838
 839         return kvm;
 840
 841 }
 842
 843 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
 844                                         struct kvm_irqchip *chip)
 845 {
 846         int r;
 847
 848         r = 0;
 849         switch (chip->chip_id) {
 850         case KVM_IRQCHIP_IOAPIC:
 851                 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
 852                 break;
 853         default:
 854                 r = -EINVAL;
 855                 break;
 856         }
 857         return r;
 858 }
 859
 860 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
 861 {
 862         int r;
 863
 864         r = 0;
 865         switch (chip->chip_id) {
 866         case KVM_IRQCHIP_IOAPIC:
 867                 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
 868                 break;
 869         default:
 870                 r = -EINVAL;
 871                 break;
 872         }
 873         return r;
 874 }
 875
 876 #define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
 877
 878 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 879 {
 880         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 881         int i;
 882
 883         for (i = 0; i < 16; i++) {
 884                 vpd->vgr[i] = regs->vpd.vgr[i];
 885                 vpd->vbgr[i] = regs->vpd.vbgr[i];
 886         }
 887         for (i = 0; i < 128; i++)
 888                 vpd->vcr[i] = regs->vpd.vcr[i];
 889         vpd->vhpi = regs->vpd.vhpi;
 890         vpd->vnat = regs->vpd.vnat;
 891         vpd->vbnat = regs->vpd.vbnat;
 892         vpd->vpsr = regs->vpd.vpsr;
 893
 894         vpd->vpr = regs->vpd.vpr;
 895
 896         memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
 897
 898         RESTORE_REGS(mp_state);
 899         RESTORE_REGS(vmm_rr);
 900         memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
 901         memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
 902         RESTORE_REGS(itr_regions);
 903         RESTORE_REGS(dtr_regions);
 904         RESTORE_REGS(tc_regions);
 905         RESTORE_REGS(irq_check);
 906         RESTORE_REGS(itc_check);
 907         RESTORE_REGS(timer_check);
 908         RESTORE_REGS(timer_pending);
 909         RESTORE_REGS(last_itc);
 910         for (i = 0; i < 8; i++) {
 911                 vcpu->arch.vrr[i] = regs->vrr[i];
 912                 vcpu->arch.ibr[i] = regs->ibr[i];
 913                 vcpu->arch.dbr[i] = regs->dbr[i];
 914         }
 915         for (i = 0; i < 4; i++)
 916                 vcpu->arch.insvc[i] = regs->insvc[i];
 917         RESTORE_REGS(xtp);
 918         RESTORE_REGS(metaphysical_rr0);
 919         RESTORE_REGS(metaphysical_rr4);
 920         RESTORE_REGS(metaphysical_saved_rr0);
 921         RESTORE_REGS(metaphysical_saved_rr4);
 922         RESTORE_REGS(fp_psr);
 923         RESTORE_REGS(saved_gp);
 924
 925         vcpu->arch.irq_new_pending = 1;
 926         vcpu->arch.itc_offset = regs->saved_itc - kvm_get_itc(vcpu);
 927         set_bit(KVM_REQ_RESUME, &vcpu->requests);
 928
 929         return 0;
 930 }
 931
 932 long kvm_arch_vm_ioctl(struct file *filp,
 933                 unsigned int ioctl, unsigned long arg)
 934 {
 935         struct kvm *kvm = filp->private_data;
 936         void __user *argp = (void __user *)arg;
 937         int r = -ENOTTY;
 938
 939         switch (ioctl) {
 940         case KVM_SET_MEMORY_REGION: {
 941                 struct kvm_memory_region kvm_mem;
 942                 struct kvm_userspace_memory_region kvm_userspace_mem;
 943
 944                 r = -EFAULT;
 945                 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
 946                         goto out;
 947                 kvm_userspace_mem.slot = kvm_mem.slot;
 948                 kvm_userspace_mem.flags = kvm_mem.flags;
 949                 kvm_userspace_mem.guest_phys_addr =
 950                                         kvm_mem.guest_phys_addr;
 951                 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
 952                 r = kvm_vm_ioctl_set_memory_region(kvm,
 953                                         &kvm_userspace_mem, 0);
 954                 if (r)
 955                         goto out;
 956                 break;
 957                 }
 958         case KVM_CREATE_IRQCHIP:
 959                 r = -EFAULT;
 960                 r = kvm_ioapic_init(kvm);
 961                 if (r)
 962                         goto out;
 963                 r = kvm_setup_default_irq_routing(kvm);
 964                 if (r) {
 965                         kvm_ioapic_destroy(kvm);
 966                         goto out;
 967                 }
 968                 break;
 969         case KVM_IRQ_LINE_STATUS:
 970         case KVM_IRQ_LINE: {
 971                 struct kvm_irq_level irq_event;
 972
 973                 r = -EFAULT;
 974                 if (copy_from_user(&irq_event, argp, sizeof irq_event))
 975                         goto out;
 976                 r = -ENXIO;
 977                 if (irqchip_in_kernel(kvm)) {
 978                         __s32 status;
 979                         status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
 980                                     irq_event.irq, irq_event.level);
 981                         if (ioctl == KVM_IRQ_LINE_STATUS) {
 982                                 r = -EFAULT;
 983                                 irq_event.status = status;
 984                                 if (copy_to_user(argp, &irq_event,
 985                                                         sizeof irq_event))
 986                                         goto out;
 987                         }
 988                         r = 0;
 989                 }
 990                 break;
 991                 }
 992         case KVM_GET_IRQCHIP: {
 993                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
 994                 struct kvm_irqchip chip;
 995
 996                 r = -EFAULT;
 997                 if (copy_from_user(&chip, argp, sizeof chip))
 998                                 goto out;
 999                 r = -ENXIO;
1000                 if (!irqchip_in_kernel(kvm))
1001                         goto out;
1002                 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
1003                 if (r)
1004                         goto out;
1005                 r = -EFAULT;
1006                 if (copy_to_user(argp, &chip, sizeof chip))
1007                                 goto out;
1008                 r = 0;
1009                 break;
1010                 }
1011         case KVM_SET_IRQCHIP: {
1012                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
1013                 struct kvm_irqchip chip;
1014
1015                 r = -EFAULT;
1016                 if (copy_from_user(&chip, argp, sizeof chip))
1017                                 goto out;
1018                 r = -ENXIO;
1019                 if (!irqchip_in_kernel(kvm))
1020                         goto out;
1021                 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1022                 if (r)
1023                         goto out;
1024                 r = 0;
1025                 break;
1026                 }
1027         default:
1028                 ;
1029         }
1030 out:
1031         return r;
1032 }
1033
1034 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1035                 struct kvm_sregs *sregs)
1036 {
1037         return -EINVAL;
1038 }
1039
1040 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1041                 struct kvm_sregs *sregs)
1042 {
1043         return -EINVAL;
1044
1045 }
1046 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1047                 struct kvm_translation *tr)
1048 {
1049
1050         return -EINVAL;
1051 }
1052
1053 static int kvm_alloc_vmm_area(void)
1054 {
1055         if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1056                 kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1057                                 get_order(KVM_VMM_SIZE));
1058                 if (!kvm_vmm_base)
1059                         return -ENOMEM;
1060
1061                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1062                 kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1063
1064                 printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1065                                 kvm_vmm_base, kvm_vm_buffer);
1066         }
1067
1068         return 0;
1069 }
1070
1071 static void kvm_free_vmm_area(void)
1072 {
1073         if (kvm_vmm_base) {
1074                 /*Zero this area before free to avoid bits leak!!*/
1075                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1076                 free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1077                 kvm_vmm_base  = 0;
1078                 kvm_vm_buffer = 0;
1079                 kvm_vsa_base = 0;
1080         }
1081 }
1082
1083 static int vti_init_vpd(struct kvm_vcpu *vcpu)
1084 {
1085         int i;
1086         union cpuid3_t cpuid3;
1087         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1088
1089         if (IS_ERR(vpd))
1090                 return PTR_ERR(vpd);
1091
1092         /* CPUID init */
1093         for (i = 0; i < 5; i++)
1094                 vpd->vcpuid[i] = ia64_get_cpuid(i);
1095
1096         /* Limit the CPUID number to 5 */
1097         cpuid3.value = vpd->vcpuid[3];
1098         cpuid3.number = 4;      /* 5 - 1 */
1099         vpd->vcpuid[3] = cpuid3.value;
1100
1101         /*Set vac and vdc fields*/
1102         vpd->vac.a_from_int_cr = 1;
1103         vpd->vac.a_to_int_cr = 1;
1104         vpd->vac.a_from_psr = 1;
1105         vpd->vac.a_from_cpuid = 1;
1106         vpd->vac.a_cover = 1;
1107         vpd->vac.a_bsw = 1;
1108         vpd->vac.a_int = 1;
1109         vpd->vdc.d_vmsw = 1;
1110
1111         /*Set virtual buffer*/
1112         vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
1113
1114         return 0;
1115 }
1116
1117 static int vti_create_vp(struct kvm_vcpu *vcpu)
1118 {
1119         long ret;
1120         struct vpd *vpd = vcpu->arch.vpd;
1121         unsigned long  vmm_ivt;
1122
1123         vmm_ivt = kvm_vmm_info->vmm_ivt;
1124
1125         printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
1126
1127         ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
1128
1129         if (ret) {
1130                 printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
1131                 return -EINVAL;
1132         }
1133         return 0;
1134 }
1135
1136 static void init_ptce_info(struct kvm_vcpu *vcpu)
1137 {
1138         ia64_ptce_info_t ptce = {0};
1139
1140         ia64_get_ptce(&ptce);
1141         vcpu->arch.ptce_base = ptce.base;
1142         vcpu->arch.ptce_count[0] = ptce.count[0];
1143         vcpu->arch.ptce_count[1] = ptce.count[1];
1144         vcpu->arch.ptce_stride[0] = ptce.stride[0];
1145         vcpu->arch.ptce_stride[1] = ptce.stride[1];
1146 }
1147
1148 static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
1149 {
1150         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
1151
1152         if (hrtimer_cancel(p_ht))
1153                 hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
1154 }
1155
1156 static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
1157 {
1158         struct kvm_vcpu *vcpu;
1159         wait_queue_head_t *q;
1160
1161         vcpu  = container_of(data, struct kvm_vcpu, arch.hlt_timer);
1162         q = &vcpu->wq;
1163
1164         if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
1165                 goto out;
1166
1167         if (waitqueue_active(q))
1168                 wake_up_interruptible(q);
1169
1170 out:
1171         vcpu->arch.timer_fired = 1;
1172         vcpu->arch.timer_check = 1;
1173         return HRTIMER_NORESTART;
1174 }
1175
1176 #define PALE_RESET_ENTRY    0x80000000ffffffb0UL
1177
1178 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1179 {
1180         struct kvm_vcpu *v;
1181         int r;
1182         int i;
1183         long itc_offset;
1184         struct kvm *kvm = vcpu->kvm;
1185         struct kvm_pt_regs *regs = vcpu_regs(vcpu);
1186
1187         union context *p_ctx = &vcpu->arch.guest;
1188         struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
1189
1190         /*Init vcpu context for first run.*/
1191         if (IS_ERR(vmm_vcpu))
1192                 return PTR_ERR(vmm_vcpu);
1193
1194         if (kvm_vcpu_is_bsp(vcpu)) {
1195                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1196
1197                 /*Set entry address for first run.*/
1198                 regs->cr_iip = PALE_RESET_ENTRY;
1199
1200                 /*Initialize itc offset for vcpus*/
1201                 itc_offset = 0UL - kvm_get_itc(vcpu);
1202                 for (i = 0; i < KVM_MAX_VCPUS; i++) {
1203                         v = (struct kvm_vcpu *)((char *)vcpu +
1204                                         sizeof(struct kvm_vcpu_data) * i);
1205                         v->arch.itc_offset = itc_offset;
1206                         v->arch.last_itc = 0;
1207                 }
1208         } else
1209                 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
1210
1211         r = -ENOMEM;
1212         vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
1213         if (!vcpu->arch.apic)
1214                 goto out;
1215         vcpu->arch.apic->vcpu = vcpu;
1216
1217         p_ctx->gr[1] = 0;
1218         p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + KVM_STK_OFFSET);
1219         p_ctx->gr[13] = (unsigned long)vmm_vcpu;
1220         p_ctx->psr = 0x1008522000UL;
1221         p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
1222         p_ctx->caller_unat = 0;
1223         p_ctx->pr = 0x0;
1224         p_ctx->ar[36] = 0x0; /*unat*/
1225         p_ctx->ar[19] = 0x0; /*rnat*/
1226         p_ctx->ar[18] = (unsigned long)vmm_vcpu +
1227                                 ((sizeof(struct kvm_vcpu)+15) & ~15);
1228         p_ctx->ar[64] = 0x0; /*pfs*/
1229         p_ctx->cr[0] = 0x7e04UL;
1230         p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
1231         p_ctx->cr[8] = 0x3c;
1232
1233         /*Initialize region register*/
1234         p_ctx->rr[0] = 0x30;
1235         p_ctx->rr[1] = 0x30;
1236         p_ctx->rr[2] = 0x30;
1237         p_ctx->rr[3] = 0x30;
1238         p_ctx->rr[4] = 0x30;
1239         p_ctx->rr[5] = 0x30;
1240         p_ctx->rr[7] = 0x30;
1241
1242         /*Initialize branch register 0*/
1243         p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
1244
1245         vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
1246         vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
1247         vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
1248
1249         hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
1250         vcpu->arch.hlt_timer.function = hlt_timer_fn;
1251
1252         vcpu->arch.last_run_cpu = -1;
1253         vcpu->arch.vpd = (struct vpd *)VPD_BASE(vcpu->vcpu_id);
1254         vcpu->arch.vsa_base = kvm_vsa_base;
1255         vcpu->arch.__gp = kvm_vmm_gp;
1256         vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
1257         vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_BASE(vcpu->vcpu_id);
1258         vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(vcpu->vcpu_id);
1259         init_ptce_info(vcpu);
1260
1261         r = 0;
1262 out:
1263         return r;
1264 }
1265
1266 static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
1267 {
1268         unsigned long psr;
1269         int r;
1270
1271         local_irq_save(psr);
1272         r = kvm_insert_vmm_mapping(vcpu);
1273         local_irq_restore(psr);
1274         if (r)
1275                 goto fail;
1276         r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1277         if (r)
1278                 goto fail;
1279
1280         r = vti_init_vpd(vcpu);
1281         if (r) {
1282                 printk(KERN_DEBUG"kvm: vpd init error!!\n");
1283                 goto uninit;
1284         }
1285
1286         r = vti_create_vp(vcpu);
1287         if (r)
1288                 goto uninit;
1289
1290         kvm_purge_vmm_mapping(vcpu);
1291
1292         return 0;
1293 uninit:
1294         kvm_vcpu_uninit(vcpu);
1295 fail:
1296         return r;
1297 }
1298
1299 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1300                 unsigned int id)
1301 {
1302         struct kvm_vcpu *vcpu;
1303         unsigned long vm_base = kvm->arch.vm_base;
1304         int r;
1305         int cpu;
1306
1307         BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
1308
1309         r = -EINVAL;
1310         if (id >= KVM_MAX_VCPUS) {
1311                 printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
1312                                 KVM_MAX_VCPUS);
1313                 goto fail;
1314         }
1315
1316         r = -ENOMEM;
1317         if (!vm_base) {
1318                 printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1319                 goto fail;
1320         }
1321         vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
1322                                         vcpu_data[id].vcpu_struct));
1323         vcpu->kvm = kvm;
1324
1325         cpu = get_cpu();
1326         r = vti_vcpu_setup(vcpu, id);
1327         put_cpu();
1328
1329         if (r) {
1330                 printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1331                 goto fail;
1332         }
1333
1334         return vcpu;
1335 fail:
1336         return ERR_PTR(r);
1337 }
1338
1339 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1340 {
1341         return 0;
1342 }
1343
1344 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1345 {
1346         return -EINVAL;
1347 }
1348
1349 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1350 {
1351         return -EINVAL;
1352 }
1353
1354 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1355                                         struct kvm_guest_debug *dbg)
1356 {
1357         return -EINVAL;
1358 }
1359
1360 static void free_kvm(struct kvm *kvm)
1361 {
1362         unsigned long vm_base = kvm->arch.vm_base;
1363
1364         if (vm_base) {
1365                 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1366                 free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1367         }
1368
1369 }
1370
1371 static void kvm_release_vm_pages(struct kvm *kvm)
1372 {
1373         struct kvm_memslots *slots;
1374         struct kvm_memory_slot *memslot;
1375         int i, j;
1376         unsigned long base_gfn;
1377
1378         slots = kvm_memslots(kvm);
1379         for (i = 0; i < slots->nmemslots; i++) {
1380                 memslot = &slots->memslots[i];
1381                 base_gfn = memslot->base_gfn;
1382
1383                 for (j = 0; j < memslot->npages; j++) {
1384                         if (memslot->rmap[j])
1385                                 put_page((struct page *)memslot->rmap[j]);
1386                 }
1387         }
1388 }
1389
1390 void kvm_arch_sync_events(struct kvm *kvm)
1391 {
1392 }
1393
1394 void kvm_arch_destroy_vm(struct kvm *kvm)
1395 {
1396         kvm_iommu_unmap_guest(kvm);
1397 #ifdef  KVM_CAP_DEVICE_ASSIGNMENT
1398         kvm_free_all_assigned_devices(kvm);
1399 #endif
1400         kfree(kvm->arch.vioapic);
1401         kvm_release_vm_pages(kvm);
1402         kvm_free_physmem(kvm);
1403         cleanup_srcu_struct(&kvm->srcu);
1404         free_kvm(kvm);
1405 }
1406
1407 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1408 {
1409 }
1410
1411 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1412 {
1413         if (cpu != vcpu->cpu) {
1414                 vcpu->cpu = cpu;
1415                 if (vcpu->arch.ht_active)
1416                         kvm_migrate_hlt_timer(vcpu);
1417         }
1418 }
1419
1420 #define SAVE_REGS(_x)   regs->_x = vcpu->arch._x
1421
1422 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1423 {
1424         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1425         int i;
1426
1427         vcpu_load(vcpu);
1428
1429         for (i = 0; i < 16; i++) {
1430                 regs->vpd.vgr[i] = vpd->vgr[i];
1431                 regs->vpd.vbgr[i] = vpd->vbgr[i];
1432         }
1433         for (i = 0; i < 128; i++)
1434                 regs->vpd.vcr[i] = vpd->vcr[i];
1435         regs->vpd.vhpi = vpd->vhpi;
1436         regs->vpd.vnat = vpd->vnat;
1437         regs->vpd.vbnat = vpd->vbnat;
1438         regs->vpd.vpsr = vpd->vpsr;
1439         regs->vpd.vpr = vpd->vpr;
1440
1441         memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
1442
1443         SAVE_REGS(mp_state);
1444         SAVE_REGS(vmm_rr);
1445         memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1446         memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1447         SAVE_REGS(itr_regions);
1448         SAVE_REGS(dtr_regions);
1449         SAVE_REGS(tc_regions);
1450         SAVE_REGS(irq_check);
1451         SAVE_REGS(itc_check);
1452         SAVE_REGS(timer_check);
1453         SAVE_REGS(timer_pending);
1454         SAVE_REGS(last_itc);
1455         for (i = 0; i < 8; i++) {
1456                 regs->vrr[i] = vcpu->arch.vrr[i];
1457                 regs->ibr[i] = vcpu->arch.ibr[i];
1458                 regs->dbr[i] = vcpu->arch.dbr[i];
1459         }
1460         for (i = 0; i < 4; i++)
1461                 regs->insvc[i] = vcpu->arch.insvc[i];
1462         regs->saved_itc = vcpu->arch.itc_offset + kvm_get_itc(vcpu);
1463         SAVE_REGS(xtp);
1464         SAVE_REGS(metaphysical_rr0);
1465         SAVE_REGS(metaphysical_rr4);
1466         SAVE_REGS(metaphysical_saved_rr0);
1467         SAVE_REGS(metaphysical_saved_rr4);
1468         SAVE_REGS(fp_psr);
1469         SAVE_REGS(saved_gp);
1470
1471         vcpu_put(vcpu);
1472         return 0;
1473 }
1474
1475 int kvm_arch_vcpu_ioctl_get_stack(struct kvm_vcpu *vcpu,
1476                                   struct kvm_ia64_vcpu_stack *stack)
1477 {
1478         memcpy(stack, vcpu, sizeof(struct kvm_ia64_vcpu_stack));
1479         return 0;
1480 }
1481
1482 int kvm_arch_vcpu_ioctl_set_stack(struct kvm_vcpu *vcpu,
1483                                   struct kvm_ia64_vcpu_stack *stack)
1484 {
1485         memcpy(vcpu + 1, &stack->stack[0] + sizeof(struct kvm_vcpu),
1486                sizeof(struct kvm_ia64_vcpu_stack) - sizeof(struct kvm_vcpu));
1487
1488         vcpu->arch.exit_data = ((struct kvm_vcpu *)stack)->arch.exit_data;
1489         return 0;
1490 }
1491
1492 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1493 {
1494
1495         hrtimer_cancel(&vcpu->arch.hlt_timer);
1496         kfree(vcpu->arch.apic);
1497 }
1498
1499
1500 long kvm_arch_vcpu_ioctl(struct file *filp,
1501                          unsigned int ioctl, unsigned long arg)
1502 {
1503         struct kvm_vcpu *vcpu = filp->private_data;
1504         void __user *argp = (void __user *)arg;
1505         struct kvm_ia64_vcpu_stack *stack = NULL;
1506         long r;
1507
1508         switch (ioctl) {
1509         case KVM_IA64_VCPU_GET_STACK: {
1510                 struct kvm_ia64_vcpu_stack __user *user_stack;
1511                 void __user *first_p = argp;
1512
1513                 r = -EFAULT;
1514                 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1515                         goto out;
1516
1517                 if (!access_ok(VERIFY_WRITE, user_stack,
1518                                sizeof(struct kvm_ia64_vcpu_stack))) {
1519                         printk(KERN_INFO "KVM_IA64_VCPU_GET_STACK: "
1520                                "Illegal user destination address for stack\n");
1521                         goto out;
1522                 }
1523                 stack = kzalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1524                 if (!stack) {
1525                         r = -ENOMEM;
1526                         goto out;
1527                 }
1528
1529                 r = kvm_arch_vcpu_ioctl_get_stack(vcpu, stack);
1530                 if (r)
1531                         goto out;
1532
1533                 if (copy_to_user(user_stack, stack,
1534                                  sizeof(struct kvm_ia64_vcpu_stack))) {
1535                         r = -EFAULT;
1536                         goto out;
1537                 }
1538
1539                 break;
1540         }
1541         case KVM_IA64_VCPU_SET_STACK: {
1542                 struct kvm_ia64_vcpu_stack __user *user_stack;
1543                 void __user *first_p = argp;
1544
1545                 r = -EFAULT;
1546                 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1547                         goto out;
1548
1549                 if (!access_ok(VERIFY_READ, user_stack,
1550                             sizeof(struct kvm_ia64_vcpu_stack))) {
1551                         printk(KERN_INFO "KVM_IA64_VCPU_SET_STACK: "
1552                                "Illegal user address for stack\n");
1553                         goto out;
1554                 }
1555                 stack = kmalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1556                 if (!stack) {
1557                         r = -ENOMEM;
1558                         goto out;
1559                 }
1560                 if (copy_from_user(stack, user_stack,
1561                                    sizeof(struct kvm_ia64_vcpu_stack)))
1562                         goto out;
1563
1564                 r = kvm_arch_vcpu_ioctl_set_stack(vcpu, stack);
1565                 break;
1566         }
1567
1568         default:
1569                 r = -EINVAL;
1570         }
1571
1572 out:
1573         kfree(stack);
1574         return r;
1575 }
1576
1577 int kvm_arch_prepare_memory_region(struct kvm *kvm,
1578                 struct kvm_memory_slot *memslot,
1579                 struct kvm_memory_slot old,
1580                 struct kvm_userspace_memory_region *mem,
1581                 int user_alloc)
1582 {
1583         unsigned long i;
1584         unsigned long pfn;
1585         int npages = memslot->npages;
1586         unsigned long base_gfn = memslot->base_gfn;
1587
1588         if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
1589                 return -ENOMEM;
1590
1591         for (i = 0; i < npages; i++) {
1592                 pfn = gfn_to_pfn(kvm, base_gfn + i);
1593                 if (!kvm_is_mmio_pfn(pfn)) {
1594                         kvm_set_pmt_entry(kvm, base_gfn + i,
1595                                         pfn << PAGE_SHIFT,
1596                                 _PAGE_AR_RWX | _PAGE_MA_WB);
1597                         memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1598                 } else {
1599                         kvm_set_pmt_entry(kvm, base_gfn + i,
1600                                         GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1601                                         _PAGE_MA_UC);
1602                         memslot->rmap[i] = 0;
1603                         }
1604         }
1605
1606         return 0;
1607 }
1608
1609 void kvm_arch_commit_memory_region(struct kvm *kvm,
1610                 struct kvm_userspace_memory_region *mem,
1611                 struct kvm_memory_slot old,
1612                 int user_alloc)
1613 {
1614         return;
1615 }
1616
1617 void kvm_arch_flush_shadow(struct kvm *kvm)
1618 {
1619         kvm_flush_remote_tlbs(kvm);
1620 }
1621
1622 long kvm_arch_dev_ioctl(struct file *filp,
1623                         unsigned int ioctl, unsigned long arg)
1624 {
1625         return -EINVAL;
1626 }
1627
1628 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1629 {
1630         kvm_vcpu_uninit(vcpu);
1631 }
1632
1633 static int vti_cpu_has_kvm_support(void)
1634 {
1635         long  avail = 1, status = 1, control = 1;
1636         long ret;
1637
1638         ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1639         if (ret)
1640                 goto out;
1641
1642         if (!(avail & PAL_PROC_VM_BIT))
1643                 goto out;
1644
1645         printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1646
1647         ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1648         if (ret)
1649                 goto out;
1650         printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1651
1652         if (!(vp_env_info & VP_OPCODE)) {
1653                 printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1654                                 "vm_env_info:0x%lx\n", vp_env_info);
1655         }
1656
1657         return 1;
1658 out:
1659         return 0;
1660 }
1661
1662
1663 /*
1664  * On SN2, the ITC isn't stable, so copy in fast path code to use the
1665  * SN2 RTC, replacing the ITC based default verion.
1666  */
1667 static void kvm_patch_vmm(struct kvm_vmm_info *vmm_info,
1668                           struct module *module)
1669 {
1670         unsigned long new_ar, new_ar_sn2;
1671         unsigned long module_base;
1672
1673         if (!ia64_platform_is("sn2"))
1674                 return;
1675
1676         module_base = (unsigned long)module->module_core;
1677
1678         new_ar = kvm_vmm_base + vmm_info->patch_mov_ar - module_base;
1679         new_ar_sn2 = kvm_vmm_base + vmm_info->patch_mov_ar_sn2 - module_base;
1680
1681         printk(KERN_INFO "kvm: Patching ITC emulation to use SGI SN2 RTC "
1682                "as source\n");
1683
1684         /*
1685          * Copy the SN2 version of mov_ar into place. They are both
1686          * the same size, so 6 bundles is sufficient (6 * 0x10).
1687          */
1688         memcpy((void *)new_ar, (void *)new_ar_sn2, 0x60);
1689 }
1690
1691 static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1692                             struct module *module)
1693 {
1694         unsigned long module_base;
1695         unsigned long vmm_size;
1696
1697         unsigned long vmm_offset, func_offset, fdesc_offset;
1698         struct fdesc *p_fdesc;
1699
1700         BUG_ON(!module);
1701
1702         if (!kvm_vmm_base) {
1703                 printk("kvm: kvm area hasn't been initialized yet!!\n");
1704                 return -EFAULT;
1705         }
1706
1707         /*Calculate new position of relocated vmm module.*/
1708         module_base = (unsigned long)module->module_core;
1709         vmm_size = module->core_size;
1710         if (unlikely(vmm_size > KVM_VMM_SIZE))
1711                 return -EFAULT;
1712
1713         memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1714         kvm_patch_vmm(vmm_info, module);
1715         kvm_flush_icache(kvm_vmm_base, vmm_size);
1716
1717         /*Recalculate kvm_vmm_info based on new VMM*/
1718         vmm_offset = vmm_info->vmm_ivt - module_base;
1719         kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1720         printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1721                         kvm_vmm_info->vmm_ivt);
1722
1723         fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1724         kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1725                                                         fdesc_offset);
1726         func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1727         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1728         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1729         p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1730
1731         printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1732                         KVM_VMM_BASE+func_offset);
1733
1734         fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1735         kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1736                         fdesc_offset);
1737         func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1738         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1739         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1740         p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1741
1742         kvm_vmm_gp = p_fdesc->gp;
1743
1744         printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1745                                                 kvm_vmm_info->vmm_entry);
1746         printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1747                                                 KVM_VMM_BASE + func_offset);
1748
1749         return 0;
1750 }
1751
1752 int kvm_arch_init(void *opaque)
1753 {
1754         int r;
1755         struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1756
1757         if (!vti_cpu_has_kvm_support()) {
1758                 printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1759                 r = -EOPNOTSUPP;
1760                 goto out;
1761         }
1762
1763         if (kvm_vmm_info) {
1764                 printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1765                 r = -EEXIST;
1766                 goto out;
1767         }
1768
1769         r = -ENOMEM;
1770         kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1771         if (!kvm_vmm_info)
1772                 goto out;
1773
1774         if (kvm_alloc_vmm_area())
1775                 goto out_free0;
1776
1777         r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1778         if (r)
1779                 goto out_free1;
1780
1781         return 0;
1782
1783 out_free1:
1784         kvm_free_vmm_area();
1785 out_free0:
1786         kfree(kvm_vmm_info);
1787 out:
1788         return r;
1789 }
1790
1791 void kvm_arch_exit(void)
1792 {
1793         kvm_free_vmm_area();
1794         kfree(kvm_vmm_info);
1795         kvm_vmm_info = NULL;
1796 }
1797
1798 static void kvm_ia64_sync_dirty_log(struct kvm *kvm,
1799                                     struct kvm_memory_slot *memslot)
1800 {
1801         int i;
1802         long base;
1803         unsigned long n;
1804         unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
1805                         offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
1806
1807         n = kvm_dirty_bitmap_bytes(memslot);
1808         base = memslot->base_gfn / BITS_PER_LONG;
1809
1810         spin_lock(&kvm->arch.dirty_log_lock);
1811         for (i = 0; i < n/sizeof(long); ++i) {
1812                 memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1813                 dirty_bitmap[base + i] = 0;
1814         }
1815         spin_unlock(&kvm->arch.dirty_log_lock);
1816 }
1817
1818 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1819                 struct kvm_dirty_log *log)
1820 {
1821         int r;
1822         unsigned long n;
1823         struct kvm_memory_slot *memslot;
1824         int is_dirty = 0;
1825
1826         mutex_lock(&kvm->slots_lock);
1827
1828         r = -EINVAL;
1829         if (log->slot >= KVM_MEMORY_SLOTS)
1830                 goto out;
1831
1832         memslot = &kvm->memslots->memslots[log->slot];
1833         r = -ENOENT;
1834         if (!memslot->dirty_bitmap)
1835                 goto out;
1836
1837         kvm_ia64_sync_dirty_log(kvm, memslot);
1838         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1839         if (r)
1840                 goto out;
1841
1842         /* If nothing is dirty, don't bother messing with page tables. */
1843         if (is_dirty) {
1844                 kvm_flush_remote_tlbs(kvm);
1845                 n = kvm_dirty_bitmap_bytes(memslot);
1846                 memset(memslot->dirty_bitmap, 0, n);
1847         }
1848         r = 0;
1849 out:
1850         mutex_unlock(&kvm->slots_lock);
1851         return r;
1852 }
1853
1854 int kvm_arch_hardware_setup(void)
1855 {
1856         return 0;
1857 }
1858
1859 void kvm_arch_hardware_unsetup(void)
1860 {
1861 }
1862
1863 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
1864 {
1865         int me;
1866         int cpu = vcpu->cpu;
1867
1868         if (waitqueue_active(&vcpu->wq))
1869                 wake_up_interruptible(&vcpu->wq);
1870
1871         me = get_cpu();
1872         if (cpu != me && (unsigned) cpu < nr_cpu_ids && cpu_online(cpu))
1873                 if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests))
1874                         smp_send_reschedule(cpu);
1875         put_cpu();
1876 }
1877
1878 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)
1879 {
1880         return __apic_accept_irq(vcpu, irq->vector);
1881 }
1882
1883 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1884 {
1885         return apic->vcpu->vcpu_id == dest;
1886 }
1887
1888 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1889 {
1890         return 0;
1891 }
1892
1893 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
1894 {
1895         return vcpu1->arch.xtp - vcpu2->arch.xtp;
1896 }
1897
1898 int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
1899                 int short_hand, int dest, int dest_mode)
1900 {
1901         struct kvm_lapic *target = vcpu->arch.apic;
1902         return (dest_mode == 0) ?
1903                 kvm_apic_match_physical_addr(target, dest) :
1904                 kvm_apic_match_logical_addr(target, dest);
1905 }
1906
1907 static int find_highest_bits(int *dat)
1908 {
1909         u32  bits, bitnum;
1910         int i;
1911
1912         /* loop for all 256 bits */
1913         for (i = 7; i >= 0 ; i--) {
1914                 bits = dat[i];
1915                 if (bits) {
1916                         bitnum = fls(bits);
1917                         return i * 32 + bitnum - 1;
1918                 }
1919         }
1920
1921         return -1;
1922 }
1923
1924 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1925 {
1926     struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1927
1928     if (vpd->irr[0] & (1UL << NMI_VECTOR))
1929                 return NMI_VECTOR;
1930     if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1931                 return ExtINT_VECTOR;
1932
1933     return find_highest_bits((int *)&vpd->irr[0]);
1934 }
1935
1936 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1937 {
1938         return vcpu->arch.timer_fired;
1939 }
1940
1941 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1942 {
1943         return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) ||
1944                 (kvm_highest_pending_irq(vcpu) != -1);
1945 }
1946
1947 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1948                                     struct kvm_mp_state *mp_state)
1949 {
1950         mp_state->mp_state = vcpu->arch.mp_state;
1951         return 0;
1952 }
1953
1954 static int vcpu_reset(struct kvm_vcpu *vcpu)
1955 {
1956         int r;
1957         long psr;
1958         local_irq_save(psr);
1959         r = kvm_insert_vmm_mapping(vcpu);
1960         local_irq_restore(psr);
1961         if (r)
1962                 goto fail;
1963
1964         vcpu->arch.launched = 0;
1965         kvm_arch_vcpu_uninit(vcpu);
1966         r = kvm_arch_vcpu_init(vcpu);
1967         if (r)
1968                 goto fail;
1969
1970         kvm_purge_vmm_mapping(vcpu);
1971         r = 0;
1972 fail:
1973         return r;
1974 }
1975
1976 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1977                                     struct kvm_mp_state *mp_state)
1978 {
1979         int r = 0;
1980
1981         vcpu->arch.mp_state = mp_state->mp_state;
1982         if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
1983                 r = vcpu_reset(vcpu);
1984         return r;
1985 }