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