arch/ia64/kvm/kvm-ia64.c

   1 /*
   2  * kvm_ia64.c: Basic KVM suppport On Itanium series processors
   3  *
   4  *
   5  *      Copyright (C) 2007, Intel Corporation.
   6  *      Xiantao Zhang  (xiantao.zhang@intel.com)
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms and conditions of the GNU General Public License,
  10  * version 2, as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope it will be useful, but WITHOUT
  13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  15  * more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along with
  18  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
  19  * Place - Suite 330, Boston, MA 02111-1307 USA.
  20  *
  21  */
  22
  23 #include <linux/module.h>
  24 #include <linux/errno.h>
  25 #include <linux/percpu.h>
  26 #include <linux/fs.h>
  27 #include <linux/slab.h>
  28 #include <linux/smp.h>
  29 #include <linux/kvm_host.h>
  30 #include <linux/kvm.h>
  31 #include <linux/bitops.h>
  32 #include <linux/hrtimer.h>
  33 #include <linux/uaccess.h>
  34 #include <linux/iommu.h>
  35 #include <linux/intel-iommu.h>
  36 #include <linux/pci.h>
  37
  38 #include <asm/pgtable.h>
  39 #include <asm/gcc_intrin.h>
  40 #include <asm/pal.h>
  41 #include <asm/cacheflush.h>
  42 #include <asm/div64.h>
  43 #include <asm/tlb.h>
  44 #include <asm/elf.h>
  45 #include <asm/sn/addrs.h>
  46 #include <asm/sn/clksupport.h>
  47 #include <asm/sn/shub_mmr.h>
  48
  49 #include "misc.h"
  50 #include "vti.h"
  51 #include "iodev.h"
  52 #include "ioapic.h"
  53 #include "lapic.h"
  54 #include "irq.h"
  55
  56 static unsigned long kvm_vmm_base;
  57 static unsigned long kvm_vsa_base;
  58 static unsigned long kvm_vm_buffer;
  59 static unsigned long kvm_vm_buffer_size;
  60 unsigned long kvm_vmm_gp;
  61
  62 static long vp_env_info;
  63
  64 static struct kvm_vmm_info *kvm_vmm_info;
  65
  66 static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu);
  67
  68 struct kvm_stats_debugfs_item debugfs_entries[] = {
  69         { NULL }
  70 };
  71
  72 static unsigned long kvm_get_itc(struct kvm_vcpu *vcpu)
  73 {
  74 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
  75         if (vcpu->kvm->arch.is_sn2)
  76                 return rtc_time();
  77         else
  78 #endif
  79                 return ia64_getreg(_IA64_REG_AR_ITC);
  80 }
  81
  82 static void kvm_flush_icache(unsigned long start, unsigned long len)
  83 {
  84         int l;
  85
  86         for (l = 0; l < (len + 32); l += 32)
  87                 ia64_fc((void *)(start + l));
  88
  89         ia64_sync_i();
  90         ia64_srlz_i();
  91 }
  92
  93 static void kvm_flush_tlb_all(void)
  94 {
  95         unsigned long i, j, count0, count1, stride0, stride1, addr;
  96         long flags;
  97
  98         addr    = local_cpu_data->ptce_base;
  99         count0  = local_cpu_data->ptce_count[0];
 100         count1  = local_cpu_data->ptce_count[1];
 101         stride0 = local_cpu_data->ptce_stride[0];
 102         stride1 = local_cpu_data->ptce_stride[1];
 103
 104         local_irq_save(flags);
 105         for (i = 0; i < count0; ++i) {
 106                 for (j = 0; j < count1; ++j) {
 107                         ia64_ptce(addr);
 108                         addr += stride1;
 109                 }
 110                 addr += stride0;
 111         }
 112         local_irq_restore(flags);
 113         ia64_srlz_i();                  /* srlz.i implies srlz.d */
 114 }
 115
 116 long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler)
 117 {
 118         struct ia64_pal_retval iprv;
 119
 120         PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva,
 121                         (u64)opt_handler);
 122
 123         return iprv.status;
 124 }
 125
 126 static  DEFINE_SPINLOCK(vp_lock);
 127
 128 int kvm_arch_hardware_enable(void *garbage)
 129 {
 130         long  status;
 131         long  tmp_base;
 132         unsigned long pte;
 133         unsigned long saved_psr;
 134         int slot;
 135
 136         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
 137         local_irq_save(saved_psr);
 138         slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 139         local_irq_restore(saved_psr);
 140         if (slot < 0)
 141                 return -EINVAL;
 142
 143         spin_lock(&vp_lock);
 144         status = ia64_pal_vp_init_env(kvm_vsa_base ?
 145                                 VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
 146                         __pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
 147         if (status != 0) {
 148                 spin_unlock(&vp_lock);
 149                 printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
 150                 return -EINVAL;
 151         }
 152
 153         if (!kvm_vsa_base) {
 154                 kvm_vsa_base = tmp_base;
 155                 printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
 156         }
 157         spin_unlock(&vp_lock);
 158         ia64_ptr_entry(0x3, slot);
 159
 160         return 0;
 161 }
 162
 163 void kvm_arch_hardware_disable(void *garbage)
 164 {
 165
 166         long status;
 167         int slot;
 168         unsigned long pte;
 169         unsigned long saved_psr;
 170         unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
 171
 172         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
 173                                 PAGE_KERNEL));
 174
 175         local_irq_save(saved_psr);
 176         slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 177         local_irq_restore(saved_psr);
 178         if (slot < 0)
 179                 return;
 180
 181         status = ia64_pal_vp_exit_env(host_iva);
 182         if (status)
 183                 printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
 184                                 status);
 185         ia64_ptr_entry(0x3, slot);
 186 }
 187
 188 void kvm_arch_check_processor_compat(void *rtn)
 189 {
 190         *(int *)rtn = 0;
 191 }
 192
 193 int kvm_dev_ioctl_check_extension(long ext)
 194 {
 195
 196         int r;
 197
 198         switch (ext) {
 199         case KVM_CAP_IRQCHIP:
 200         case KVM_CAP_MP_STATE:
 201         case KVM_CAP_IRQ_INJECT_STATUS:
 202                 r = 1;
 203                 break;
 204         case KVM_CAP_COALESCED_MMIO:
 205                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
 206                 break;
 207         case KVM_CAP_IOMMU:
 208                 r = iommu_present(&pci_bus_type);
 209                 break;
 210         default:
 211                 r = 0;
 212         }
 213         return r;
 214
 215 }
 216
 217 static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 218 {
 219         kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 220         kvm_run->hw.hardware_exit_reason = 1;
 221         return 0;
 222 }
 223
 224 static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 225 {
 226         struct kvm_mmio_req *p;
 227         struct kvm_io_device *mmio_dev;
 228         int r;
 229
 230         p = kvm_get_vcpu_ioreq(vcpu);
 231
 232         if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS)
 233                 goto mmio;
 234         vcpu->mmio_needed = 1;
 235         vcpu->mmio_fragments[0].gpa = kvm_run->mmio.phys_addr = p->addr;
 236         vcpu->mmio_fragments[0].len = kvm_run->mmio.len = p->size;
 237         vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir;
 238
 239         if (vcpu->mmio_is_write)
 240                 memcpy(vcpu->arch.mmio_data, &p->data, p->size);
 241         memcpy(kvm_run->mmio.data, &p->data, p->size);
 242         kvm_run->exit_reason = KVM_EXIT_MMIO;
 243         return 0;
 244 mmio:
 245         if (p->dir)
 246                 r = kvm_io_bus_read(vcpu->kvm, KVM_MMIO_BUS, p->addr,
 247                                     p->size, &p->data);
 248         else
 249                 r = kvm_io_bus_write(vcpu->kvm, KVM_MMIO_BUS, p->addr,
 250                                      p->size, &p->data);
 251         if (r)
 252                 printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr);
 253         p->state = STATE_IORESP_READY;
 254
 255         return 1;
 256 }
 257
 258 static int handle_pal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 259 {
 260         struct exit_ctl_data *p;
 261
 262         p = kvm_get_exit_data(vcpu);
 263
 264         if (p->exit_reason == EXIT_REASON_PAL_CALL)
 265                 return kvm_pal_emul(vcpu, kvm_run);
 266         else {
 267                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 268                 kvm_run->hw.hardware_exit_reason = 2;
 269                 return 0;
 270         }
 271 }
 272
 273 static int handle_sal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 274 {
 275         struct exit_ctl_data *p;
 276
 277         p = kvm_get_exit_data(vcpu);
 278
 279         if (p->exit_reason == EXIT_REASON_SAL_CALL) {
 280                 kvm_sal_emul(vcpu);
 281                 return 1;
 282         } else {
 283                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 284                 kvm_run->hw.hardware_exit_reason = 3;
 285                 return 0;
 286         }
 287
 288 }
 289
 290 static int __apic_accept_irq(struct kvm_vcpu *vcpu, uint64_t vector)
 291 {
 292         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 293
 294         if (!test_and_set_bit(vector, &vpd->irr[0])) {
 295                 vcpu->arch.irq_new_pending = 1;
 296                 kvm_vcpu_kick(vcpu);
 297                 return 1;
 298         }
 299         return 0;
 300 }
 301
 302 /*
 303  *  offset: address offset to IPI space.
 304  *  value:  deliver value.
 305  */
 306 static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm,
 307                                 uint64_t vector)
 308 {
 309         switch (dm) {
 310         case SAPIC_FIXED:
 311                 break;
 312         case SAPIC_NMI:
 313                 vector = 2;
 314                 break;
 315         case SAPIC_EXTINT:
 316                 vector = 0;
 317                 break;
 318         case SAPIC_INIT:
 319         case SAPIC_PMI:
 320         default:
 321                 printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n");
 322                 return;
 323         }
 324         __apic_accept_irq(vcpu, vector);
 325 }
 326
 327 static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id,
 328                         unsigned long eid)
 329 {
 330         union ia64_lid lid;
 331         int i;
 332         struct kvm_vcpu *vcpu;
 333
 334         kvm_for_each_vcpu(i, vcpu, kvm) {
 335                 lid.val = VCPU_LID(vcpu);
 336                 if (lid.id == id && lid.eid == eid)
 337                         return vcpu;
 338         }
 339
 340         return NULL;
 341 }
 342
 343 static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 344 {
 345         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 346         struct kvm_vcpu *target_vcpu;
 347         struct kvm_pt_regs *regs;
 348         union ia64_ipi_a addr = p->u.ipi_data.addr;
 349         union ia64_ipi_d data = p->u.ipi_data.data;
 350
 351         target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid);
 352         if (!target_vcpu)
 353                 return handle_vm_error(vcpu, kvm_run);
 354
 355         if (!target_vcpu->arch.launched) {
 356                 regs = vcpu_regs(target_vcpu);
 357
 358                 regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip;
 359                 regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp;
 360
 361                 target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 362                 if (waitqueue_active(&target_vcpu->wq))
 363                         wake_up_interruptible(&target_vcpu->wq);
 364         } else {
 365                 vcpu_deliver_ipi(target_vcpu, data.dm, data.vector);
 366                 if (target_vcpu != vcpu)
 367                         kvm_vcpu_kick(target_vcpu);
 368         }
 369
 370         return 1;
 371 }
 372
 373 struct call_data {
 374         struct kvm_ptc_g ptc_g_data;
 375         struct kvm_vcpu *vcpu;
 376 };
 377
 378 static void vcpu_global_purge(void *info)
 379 {
 380         struct call_data *p = (struct call_data *)info;
 381         struct kvm_vcpu *vcpu = p->vcpu;
 382
 383         if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
 384                 return;
 385
 386         set_bit(KVM_REQ_PTC_G, &vcpu->requests);
 387         if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) {
 388                 vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] =
 389                                                         p->ptc_g_data;
 390         } else {
 391                 clear_bit(KVM_REQ_PTC_G, &vcpu->requests);
 392                 vcpu->arch.ptc_g_count = 0;
 393                 set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
 394         }
 395 }
 396
 397 static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 398 {
 399         struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
 400         struct kvm *kvm = vcpu->kvm;
 401         struct call_data call_data;
 402         int i;
 403         struct kvm_vcpu *vcpui;
 404
 405         call_data.ptc_g_data = p->u.ptc_g_data;
 406
 407         kvm_for_each_vcpu(i, vcpui, kvm) {
 408                 if (vcpui->arch.mp_state == KVM_MP_STATE_UNINITIALIZED ||
 409                                 vcpu == vcpui)
 410                         continue;
 411
 412                 if (waitqueue_active(&vcpui->wq))
 413                         wake_up_interruptible(&vcpui->wq);
 414
 415                 if (vcpui->cpu != -1) {
 416                         call_data.vcpu = vcpui;
 417                         smp_call_function_single(vcpui->cpu,
 418                                         vcpu_global_purge, &call_data, 1);
 419                 } else
 420                         printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
 421
 422         }
 423         return 1;
 424 }
 425
 426 static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 427 {
 428         return 1;
 429 }
 430
 431 static int kvm_sn2_setup_mappings(struct kvm_vcpu *vcpu)
 432 {
 433         unsigned long pte, rtc_phys_addr, map_addr;
 434         int slot;
 435
 436         map_addr = KVM_VMM_BASE + (1UL << KVM_VMM_SHIFT);
 437         rtc_phys_addr = LOCAL_MMR_OFFSET | SH_RTC;
 438         pte = pte_val(mk_pte_phys(rtc_phys_addr, PAGE_KERNEL_UC));
 439         slot = ia64_itr_entry(0x3, map_addr, pte, PAGE_SHIFT);
 440         vcpu->arch.sn_rtc_tr_slot = slot;
 441         if (slot < 0) {
 442                 printk(KERN_ERR "Mayday mayday! RTC mapping failed!\n");
 443                 slot = 0;
 444         }
 445         return slot;
 446 }
 447
 448 int kvm_emulate_halt(struct kvm_vcpu *vcpu)
 449 {
 450
 451         ktime_t kt;
 452         long itc_diff;
 453         unsigned long vcpu_now_itc;
 454         unsigned long expires;
 455         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
 456         unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
 457         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 458
 459         if (irqchip_in_kernel(vcpu->kvm)) {
 460
 461                 vcpu_now_itc = kvm_get_itc(vcpu) + vcpu->arch.itc_offset;
 462
 463                 if (time_after(vcpu_now_itc, vpd->itm)) {
 464                         vcpu->arch.timer_check = 1;
 465                         return 1;
 466                 }
 467                 itc_diff = vpd->itm - vcpu_now_itc;
 468                 if (itc_diff < 0)
 469                         itc_diff = -itc_diff;
 470
 471                 expires = div64_u64(itc_diff, cyc_per_usec);
 472                 kt = ktime_set(0, 1000 * expires);
 473
 474                 vcpu->arch.ht_active = 1;
 475                 hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
 476
 477                 vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
 478                 kvm_vcpu_block(vcpu);
 479                 hrtimer_cancel(p_ht);
 480                 vcpu->arch.ht_active = 0;
 481
 482                 if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests) ||
 483                                 kvm_cpu_has_pending_timer(vcpu))
 484                         if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
 485                                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
 486
 487                 if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
 488                         return -EINTR;
 489                 return 1;
 490         } else {
 491                 printk(KERN_ERR"kvm: Unsupported userspace halt!");
 492                 return 0;
 493         }
 494 }
 495
 496 static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
 497                 struct kvm_run *kvm_run)
 498 {
 499         kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
 500         return 0;
 501 }
 502
 503 static int handle_external_interrupt(struct kvm_vcpu *vcpu,
 504                 struct kvm_run *kvm_run)
 505 {
 506         return 1;
 507 }
 508
 509 static int handle_vcpu_debug(struct kvm_vcpu *vcpu,
 510                                 struct kvm_run *kvm_run)
 511 {
 512         printk("VMM: %s", vcpu->arch.log_buf);
 513         return 1;
 514 }
 515
 516 static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
 517                 struct kvm_run *kvm_run) = {
 518         [EXIT_REASON_VM_PANIC]              = handle_vm_error,
 519         [EXIT_REASON_MMIO_INSTRUCTION]      = handle_mmio,
 520         [EXIT_REASON_PAL_CALL]              = handle_pal_call,
 521         [EXIT_REASON_SAL_CALL]              = handle_sal_call,
 522         [EXIT_REASON_SWITCH_RR6]            = handle_switch_rr6,
 523         [EXIT_REASON_VM_DESTROY]            = handle_vm_shutdown,
 524         [EXIT_REASON_EXTERNAL_INTERRUPT]    = handle_external_interrupt,
 525         [EXIT_REASON_IPI]                   = handle_ipi,
 526         [EXIT_REASON_PTC_G]                 = handle_global_purge,
 527         [EXIT_REASON_DEBUG]                 = handle_vcpu_debug,
 528
 529 };
 530
 531 static const int kvm_vti_max_exit_handlers =
 532                 sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
 533
 534 static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
 535 {
 536         struct exit_ctl_data *p_exit_data;
 537
 538         p_exit_data = kvm_get_exit_data(vcpu);
 539         return p_exit_data->exit_reason;
 540 }
 541
 542 /*
 543  * The guest has exited.  See if we can fix it or if we need userspace
 544  * assistance.
 545  */
 546 static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 547 {
 548         u32 exit_reason = kvm_get_exit_reason(vcpu);
 549         vcpu->arch.last_exit = exit_reason;
 550
 551         if (exit_reason < kvm_vti_max_exit_handlers
 552                         && kvm_vti_exit_handlers[exit_reason])
 553                 return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
 554         else {
 555                 kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
 556                 kvm_run->hw.hardware_exit_reason = exit_reason;
 557         }
 558         return 0;
 559 }
 560
 561 static inline void vti_set_rr6(unsigned long rr6)
 562 {
 563         ia64_set_rr(RR6, rr6);
 564         ia64_srlz_i();
 565 }
 566
 567 static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
 568 {
 569         unsigned long pte;
 570         struct kvm *kvm = vcpu->kvm;
 571         int r;
 572
 573         /*Insert a pair of tr to map vmm*/
 574         pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
 575         r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
 576         if (r < 0)
 577                 goto out;
 578         vcpu->arch.vmm_tr_slot = r;
 579         /*Insert a pairt of tr to map data of vm*/
 580         pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
 581         r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
 582                                         pte, KVM_VM_DATA_SHIFT);
 583         if (r < 0)
 584                 goto out;
 585         vcpu->arch.vm_tr_slot = r;
 586
 587 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 588         if (kvm->arch.is_sn2) {
 589                 r = kvm_sn2_setup_mappings(vcpu);
 590                 if (r < 0)
 591                         goto out;
 592         }
 593 #endif
 594
 595         r = 0;
 596 out:
 597         return r;
 598 }
 599
 600 static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
 601 {
 602         struct kvm *kvm = vcpu->kvm;
 603         ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
 604         ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
 605 #if defined(CONFIG_IA64_SGI_SN2) || defined(CONFIG_IA64_GENERIC)
 606         if (kvm->arch.is_sn2)
 607                 ia64_ptr_entry(0x3, vcpu->arch.sn_rtc_tr_slot);
 608 #endif
 609 }
 610
 611 static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
 612 {
 613         unsigned long psr;
 614         int r;
 615         int cpu = smp_processor_id();
 616
 617         if (vcpu->arch.last_run_cpu != cpu ||
 618                         per_cpu(last_vcpu, cpu) != vcpu) {
 619                 per_cpu(last_vcpu, cpu) = vcpu;
 620                 vcpu->arch.last_run_cpu = cpu;
 621                 kvm_flush_tlb_all();
 622         }
 623
 624         vcpu->arch.host_rr6 = ia64_get_rr(RR6);
 625         vti_set_rr6(vcpu->arch.vmm_rr);
 626         local_irq_save(psr);
 627         r = kvm_insert_vmm_mapping(vcpu);
 628         local_irq_restore(psr);
 629         return r;
 630 }
 631
 632 static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
 633 {
 634         kvm_purge_vmm_mapping(vcpu);
 635         vti_set_rr6(vcpu->arch.host_rr6);
 636 }
 637
 638 static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 639 {
 640         union context *host_ctx, *guest_ctx;
 641         int r, idx;
 642
 643         idx = srcu_read_lock(&vcpu->kvm->srcu);
 644
 645 again:
 646         if (signal_pending(current)) {
 647                 r = -EINTR;
 648                 kvm_run->exit_reason = KVM_EXIT_INTR;
 649                 goto out;
 650         }
 651
 652         preempt_disable();
 653         local_irq_disable();
 654
 655         /*Get host and guest context with guest address space.*/
 656         host_ctx = kvm_get_host_context(vcpu);
 657         guest_ctx = kvm_get_guest_context(vcpu);
 658
 659         clear_bit(KVM_REQ_KICK, &vcpu->requests);
 660
 661         r = kvm_vcpu_pre_transition(vcpu);
 662         if (r < 0)
 663                 goto vcpu_run_fail;
 664
 665         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 666         vcpu->mode = IN_GUEST_MODE;
 667         kvm_guest_enter();
 668
 669         /*
 670          * Transition to the guest
 671          */
 672         kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
 673
 674         kvm_vcpu_post_transition(vcpu);
 675
 676         vcpu->arch.launched = 1;
 677         set_bit(KVM_REQ_KICK, &vcpu->requests);
 678         local_irq_enable();
 679
 680         /*
 681          * We must have an instruction between local_irq_enable() and
 682          * kvm_guest_exit(), so the timer interrupt isn't delayed by
 683          * the interrupt shadow.  The stat.exits increment will do nicely.
 684          * But we need to prevent reordering, hence this barrier():
 685          */
 686         barrier();
 687         kvm_guest_exit();
 688         vcpu->mode = OUTSIDE_GUEST_MODE;
 689         preempt_enable();
 690
 691         idx = srcu_read_lock(&vcpu->kvm->srcu);
 692
 693         r = kvm_handle_exit(kvm_run, vcpu);
 694
 695         if (r > 0) {
 696                 if (!need_resched())
 697                         goto again;
 698         }
 699
 700 out:
 701         srcu_read_unlock(&vcpu->kvm->srcu, idx);
 702         if (r > 0) {
 703                 kvm_resched(vcpu);
 704                 idx = srcu_read_lock(&vcpu->kvm->srcu);
 705                 goto again;
 706         }
 707
 708         return r;
 709
 710 vcpu_run_fail:
 711         local_irq_enable();
 712         preempt_enable();
 713         kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
 714         goto out;
 715 }
 716
 717 static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
 718 {
 719         struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
 720
 721         if (!vcpu->mmio_is_write)
 722                 memcpy(&p->data, vcpu->arch.mmio_data, 8);
 723         p->state = STATE_IORESP_READY;
 724 }
 725
 726 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 727 {
 728         int r;
 729         sigset_t sigsaved;
 730
 731         if (vcpu->sigset_active)
 732                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
 733
 734         if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
 735                 kvm_vcpu_block(vcpu);
 736                 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
 737                 r = -EAGAIN;
 738                 goto out;
 739         }
 740
 741         if (vcpu->mmio_needed) {
 742                 memcpy(vcpu->arch.mmio_data, kvm_run->mmio.data, 8);
 743                 kvm_set_mmio_data(vcpu);
 744                 vcpu->mmio_read_completed = 1;
 745                 vcpu->mmio_needed = 0;
 746         }
 747         r = __vcpu_run(vcpu, kvm_run);
 748 out:
 749         if (vcpu->sigset_active)
 750                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
 751
 752         return r;
 753 }
 754
 755 struct kvm *kvm_arch_alloc_vm(void)
 756 {
 757
 758         struct kvm *kvm;
 759         uint64_t  vm_base;
 760
 761         BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
 762
 763         vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
 764
 765         if (!vm_base)
 766                 return NULL;
 767
 768         memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
 769         kvm = (struct kvm *)(vm_base +
 770                         offsetof(struct kvm_vm_data, kvm_vm_struct));
 771         kvm->arch.vm_base = vm_base;
 772         printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
 773
 774         return kvm;
 775 }
 776
 777 struct kvm_ia64_io_range {
 778         unsigned long start;
 779         unsigned long size;
 780         unsigned long type;
 781 };
 782
 783 static const struct kvm_ia64_io_range io_ranges[] = {
 784         {VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
 785         {MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
 786         {LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
 787         {IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
 788         {PIB_START, PIB_SIZE, GPFN_PIB},
 789 };
 790
 791 static void kvm_build_io_pmt(struct kvm *kvm)
 792 {
 793         unsigned long i, j;
 794
 795         /* Mark I/O ranges */
 796         for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
 797                                                         i++) {
 798                 for (j = io_ranges[i].start;
 799                                 j < io_ranges[i].start + io_ranges[i].size;
 800                                 j += PAGE_SIZE)
 801                         kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
 802                                         io_ranges[i].type, 0);
 803         }
 804
 805 }
 806
 807 /*Use unused rids to virtualize guest rid.*/
 808 #define GUEST_PHYSICAL_RR0      0x1739
 809 #define GUEST_PHYSICAL_RR4      0x2739
 810 #define VMM_INIT_RR             0x1660
 811
 812 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
 813 {
 814         BUG_ON(!kvm);
 815
 816         if (type)
 817                 return -EINVAL;
 818
 819         kvm->arch.is_sn2 = ia64_platform_is("sn2");
 820
 821         kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
 822         kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
 823         kvm->arch.vmm_init_rr = VMM_INIT_RR;
 824
 825         /*
 826          *Fill P2M entries for MMIO/IO ranges
 827          */
 828         kvm_build_io_pmt(kvm);
 829
 830         INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
 831
 832         /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
 833         set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
 834
 835         return 0;
 836 }
 837
 838 static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
 839                                         struct kvm_irqchip *chip)
 840 {
 841         int r;
 842
 843         r = 0;
 844         switch (chip->chip_id) {
 845         case KVM_IRQCHIP_IOAPIC:
 846                 r = kvm_get_ioapic(kvm, &chip->chip.ioapic);
 847                 break;
 848         default:
 849                 r = -EINVAL;
 850                 break;
 851         }
 852         return r;
 853 }
 854
 855 static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
 856 {
 857         int r;
 858
 859         r = 0;
 860         switch (chip->chip_id) {
 861         case KVM_IRQCHIP_IOAPIC:
 862                 r = kvm_set_ioapic(kvm, &chip->chip.ioapic);
 863                 break;
 864         default:
 865                 r = -EINVAL;
 866                 break;
 867         }
 868         return r;
 869 }
 870
 871 #define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
 872
 873 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 874 {
 875         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
 876         int i;
 877
 878         for (i = 0; i < 16; i++) {
 879                 vpd->vgr[i] = regs->vpd.vgr[i];
 880                 vpd->vbgr[i] = regs->vpd.vbgr[i];
 881         }
 882         for (i = 0; i < 128; i++)
 883                 vpd->vcr[i] = regs->vpd.vcr[i];
 884         vpd->vhpi = regs->vpd.vhpi;
 885         vpd->vnat = regs->vpd.vnat;
 886         vpd->vbnat = regs->vpd.vbnat;
 887         vpd->vpsr = regs->vpd.vpsr;
 888
 889         vpd->vpr = regs->vpd.vpr;
 890
 891         memcpy(&vcpu->arch.guest, &regs->saved_guest, sizeof(union context));
 892
 893         RESTORE_REGS(mp_state);
 894         RESTORE_REGS(vmm_rr);
 895         memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
 896         memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
 897         RESTORE_REGS(itr_regions);
 898         RESTORE_REGS(dtr_regions);
 899         RESTORE_REGS(tc_regions);
 900         RESTORE_REGS(irq_check);
 901         RESTORE_REGS(itc_check);
 902         RESTORE_REGS(timer_check);
 903         RESTORE_REGS(timer_pending);
 904         RESTORE_REGS(last_itc);
 905         for (i = 0; i < 8; i++) {
 906                 vcpu->arch.vrr[i] = regs->vrr[i];
 907                 vcpu->arch.ibr[i] = regs->ibr[i];
 908                 vcpu->arch.dbr[i] = regs->dbr[i];
 909         }
 910         for (i = 0; i < 4; i++)
 911                 vcpu->arch.insvc[i] = regs->insvc[i];
 912         RESTORE_REGS(xtp);
 913         RESTORE_REGS(metaphysical_rr0);
 914         RESTORE_REGS(metaphysical_rr4);
 915         RESTORE_REGS(metaphysical_saved_rr0);
 916         RESTORE_REGS(metaphysical_saved_rr4);
 917         RESTORE_REGS(fp_psr);
 918         RESTORE_REGS(saved_gp);
 919
 920         vcpu->arch.irq_new_pending = 1;
 921         vcpu->arch.itc_offset = regs->saved_itc - kvm_get_itc(vcpu);
 922         set_bit(KVM_REQ_RESUME, &vcpu->requests);
 923
 924         return 0;
 925 }
 926
 927 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event)
 928 {
 929         if (!irqchip_in_kernel(kvm))
 930                 return -ENXIO;
 931
 932         irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
 933                                         irq_event->irq, irq_event->level);
 934         return 0;
 935 }
 936
 937 long kvm_arch_vm_ioctl(struct file *filp,
 938                 unsigned int ioctl, unsigned long arg)
 939 {
 940         struct kvm *kvm = filp->private_data;
 941         void __user *argp = (void __user *)arg;
 942         int r = -ENOTTY;
 943
 944         switch (ioctl) {
 945         case KVM_SET_MEMORY_REGION: {
 946                 struct kvm_memory_region kvm_mem;
 947                 struct kvm_userspace_memory_region kvm_userspace_mem;
 948
 949                 r = -EFAULT;
 950                 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
 951                         goto out;
 952                 kvm_userspace_mem.slot = kvm_mem.slot;
 953                 kvm_userspace_mem.flags = kvm_mem.flags;
 954                 kvm_userspace_mem.guest_phys_addr =
 955                                         kvm_mem.guest_phys_addr;
 956                 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
 957                 r = kvm_vm_ioctl_set_memory_region(kvm,
 958                                         &kvm_userspace_mem, 0);
 959                 if (r)
 960                         goto out;
 961                 break;
 962                 }
 963         case KVM_CREATE_IRQCHIP:
 964                 r = -EFAULT;
 965                 r = kvm_ioapic_init(kvm);
 966                 if (r)
 967                         goto out;
 968                 r = kvm_setup_default_irq_routing(kvm);
 969                 if (r) {
 970                         mutex_lock(&kvm->slots_lock);
 971                         kvm_ioapic_destroy(kvm);
 972                         mutex_unlock(&kvm->slots_lock);
 973                         goto out;
 974                 }
 975                 break;
 976         case KVM_GET_IRQCHIP: {
 977                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
 978                 struct kvm_irqchip chip;
 979
 980                 r = -EFAULT;
 981                 if (copy_from_user(&chip, argp, sizeof chip))
 982                                 goto out;
 983                 r = -ENXIO;
 984                 if (!irqchip_in_kernel(kvm))
 985                         goto out;
 986                 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
 987                 if (r)
 988                         goto out;
 989                 r = -EFAULT;
 990                 if (copy_to_user(argp, &chip, sizeof chip))
 991                                 goto out;
 992                 r = 0;
 993                 break;
 994                 }
 995         case KVM_SET_IRQCHIP: {
 996                 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
 997                 struct kvm_irqchip chip;
 998
 999                 r = -EFAULT;
1000                 if (copy_from_user(&chip, argp, sizeof chip))
1001                                 goto out;
1002                 r = -ENXIO;
1003                 if (!irqchip_in_kernel(kvm))
1004                         goto out;
1005                 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
1006                 if (r)
1007                         goto out;
1008                 r = 0;
1009                 break;
1010                 }
1011         default:
1012                 ;
1013         }
1014 out:
1015         return r;
1016 }
1017
1018 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1019                 struct kvm_sregs *sregs)
1020 {
1021         return -EINVAL;
1022 }
1023
1024 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1025                 struct kvm_sregs *sregs)
1026 {
1027         return -EINVAL;
1028
1029 }
1030 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1031                 struct kvm_translation *tr)
1032 {
1033
1034         return -EINVAL;
1035 }
1036
1037 static int kvm_alloc_vmm_area(void)
1038 {
1039         if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
1040                 kvm_vmm_base = __get_free_pages(GFP_KERNEL,
1041                                 get_order(KVM_VMM_SIZE));
1042                 if (!kvm_vmm_base)
1043                         return -ENOMEM;
1044
1045                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1046                 kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
1047
1048                 printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
1049                                 kvm_vmm_base, kvm_vm_buffer);
1050         }
1051
1052         return 0;
1053 }
1054
1055 static void kvm_free_vmm_area(void)
1056 {
1057         if (kvm_vmm_base) {
1058                 /*Zero this area before free to avoid bits leak!!*/
1059                 memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
1060                 free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
1061                 kvm_vmm_base  = 0;
1062                 kvm_vm_buffer = 0;
1063                 kvm_vsa_base = 0;
1064         }
1065 }
1066
1067 static int vti_init_vpd(struct kvm_vcpu *vcpu)
1068 {
1069         int i;
1070         union cpuid3_t cpuid3;
1071         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1072
1073         if (IS_ERR(vpd))
1074                 return PTR_ERR(vpd);
1075
1076         /* CPUID init */
1077         for (i = 0; i < 5; i++)
1078                 vpd->vcpuid[i] = ia64_get_cpuid(i);
1079
1080         /* Limit the CPUID number to 5 */
1081         cpuid3.value = vpd->vcpuid[3];
1082         cpuid3.number = 4;      /* 5 - 1 */
1083         vpd->vcpuid[3] = cpuid3.value;
1084
1085         /*Set vac and vdc fields*/
1086         vpd->vac.a_from_int_cr = 1;
1087         vpd->vac.a_to_int_cr = 1;
1088         vpd->vac.a_from_psr = 1;
1089         vpd->vac.a_from_cpuid = 1;
1090         vpd->vac.a_cover = 1;
1091         vpd->vac.a_bsw = 1;
1092         vpd->vac.a_int = 1;
1093         vpd->vdc.d_vmsw = 1;
1094
1095         /*Set virtual buffer*/
1096         vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
1097
1098         return 0;
1099 }
1100
1101 static int vti_create_vp(struct kvm_vcpu *vcpu)
1102 {
1103         long ret;
1104         struct vpd *vpd = vcpu->arch.vpd;
1105         unsigned long  vmm_ivt;
1106
1107         vmm_ivt = kvm_vmm_info->vmm_ivt;
1108
1109         printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
1110
1111         ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
1112
1113         if (ret) {
1114                 printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
1115                 return -EINVAL;
1116         }
1117         return 0;
1118 }
1119
1120 static void init_ptce_info(struct kvm_vcpu *vcpu)
1121 {
1122         ia64_ptce_info_t ptce = {0};
1123
1124         ia64_get_ptce(&ptce);
1125         vcpu->arch.ptce_base = ptce.base;
1126         vcpu->arch.ptce_count[0] = ptce.count[0];
1127         vcpu->arch.ptce_count[1] = ptce.count[1];
1128         vcpu->arch.ptce_stride[0] = ptce.stride[0];
1129         vcpu->arch.ptce_stride[1] = ptce.stride[1];
1130 }
1131
1132 static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
1133 {
1134         struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
1135
1136         if (hrtimer_cancel(p_ht))
1137                 hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
1138 }
1139
1140 static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
1141 {
1142         struct kvm_vcpu *vcpu;
1143         wait_queue_head_t *q;
1144
1145         vcpu  = container_of(data, struct kvm_vcpu, arch.hlt_timer);
1146         q = &vcpu->wq;
1147
1148         if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
1149                 goto out;
1150
1151         if (waitqueue_active(q))
1152                 wake_up_interruptible(q);
1153
1154 out:
1155         vcpu->arch.timer_fired = 1;
1156         vcpu->arch.timer_check = 1;
1157         return HRTIMER_NORESTART;
1158 }
1159
1160 #define PALE_RESET_ENTRY    0x80000000ffffffb0UL
1161
1162 bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu)
1163 {
1164         return irqchip_in_kernel(vcpu->kvm) == (vcpu->arch.apic != NULL);
1165 }
1166
1167 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
1168 {
1169         struct kvm_vcpu *v;
1170         int r;
1171         int i;
1172         long itc_offset;
1173         struct kvm *kvm = vcpu->kvm;
1174         struct kvm_pt_regs *regs = vcpu_regs(vcpu);
1175
1176         union context *p_ctx = &vcpu->arch.guest;
1177         struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
1178
1179         /*Init vcpu context for first run.*/
1180         if (IS_ERR(vmm_vcpu))
1181                 return PTR_ERR(vmm_vcpu);
1182
1183         if (kvm_vcpu_is_bsp(vcpu)) {
1184                 vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
1185
1186                 /*Set entry address for first run.*/
1187                 regs->cr_iip = PALE_RESET_ENTRY;
1188
1189                 /*Initialize itc offset for vcpus*/
1190                 itc_offset = 0UL - kvm_get_itc(vcpu);
1191                 for (i = 0; i < KVM_MAX_VCPUS; i++) {
1192                         v = (struct kvm_vcpu *)((char *)vcpu +
1193                                         sizeof(struct kvm_vcpu_data) * i);
1194                         v->arch.itc_offset = itc_offset;
1195                         v->arch.last_itc = 0;
1196                 }
1197         } else
1198                 vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
1199
1200         r = -ENOMEM;
1201         vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
1202         if (!vcpu->arch.apic)
1203                 goto out;
1204         vcpu->arch.apic->vcpu = vcpu;
1205
1206         p_ctx->gr[1] = 0;
1207         p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + KVM_STK_OFFSET);
1208         p_ctx->gr[13] = (unsigned long)vmm_vcpu;
1209         p_ctx->psr = 0x1008522000UL;
1210         p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
1211         p_ctx->caller_unat = 0;
1212         p_ctx->pr = 0x0;
1213         p_ctx->ar[36] = 0x0; /*unat*/
1214         p_ctx->ar[19] = 0x0; /*rnat*/
1215         p_ctx->ar[18] = (unsigned long)vmm_vcpu +
1216                                 ((sizeof(struct kvm_vcpu)+15) & ~15);
1217         p_ctx->ar[64] = 0x0; /*pfs*/
1218         p_ctx->cr[0] = 0x7e04UL;
1219         p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
1220         p_ctx->cr[8] = 0x3c;
1221
1222         /*Initialize region register*/
1223         p_ctx->rr[0] = 0x30;
1224         p_ctx->rr[1] = 0x30;
1225         p_ctx->rr[2] = 0x30;
1226         p_ctx->rr[3] = 0x30;
1227         p_ctx->rr[4] = 0x30;
1228         p_ctx->rr[5] = 0x30;
1229         p_ctx->rr[7] = 0x30;
1230
1231         /*Initialize branch register 0*/
1232         p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
1233
1234         vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
1235         vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
1236         vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
1237
1238         hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
1239         vcpu->arch.hlt_timer.function = hlt_timer_fn;
1240
1241         vcpu->arch.last_run_cpu = -1;
1242         vcpu->arch.vpd = (struct vpd *)VPD_BASE(vcpu->vcpu_id);
1243         vcpu->arch.vsa_base = kvm_vsa_base;
1244         vcpu->arch.__gp = kvm_vmm_gp;
1245         vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
1246         vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_BASE(vcpu->vcpu_id);
1247         vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(vcpu->vcpu_id);
1248         init_ptce_info(vcpu);
1249
1250         r = 0;
1251 out:
1252         return r;
1253 }
1254
1255 static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
1256 {
1257         unsigned long psr;
1258         int r;
1259
1260         local_irq_save(psr);
1261         r = kvm_insert_vmm_mapping(vcpu);
1262         local_irq_restore(psr);
1263         if (r)
1264                 goto fail;
1265         r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
1266         if (r)
1267                 goto fail;
1268
1269         r = vti_init_vpd(vcpu);
1270         if (r) {
1271                 printk(KERN_DEBUG"kvm: vpd init error!!\n");
1272                 goto uninit;
1273         }
1274
1275         r = vti_create_vp(vcpu);
1276         if (r)
1277                 goto uninit;
1278
1279         kvm_purge_vmm_mapping(vcpu);
1280
1281         return 0;
1282 uninit:
1283         kvm_vcpu_uninit(vcpu);
1284 fail:
1285         return r;
1286 }
1287
1288 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
1289                 unsigned int id)
1290 {
1291         struct kvm_vcpu *vcpu;
1292         unsigned long vm_base = kvm->arch.vm_base;
1293         int r;
1294         int cpu;
1295
1296         BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
1297
1298         r = -EINVAL;
1299         if (id >= KVM_MAX_VCPUS) {
1300                 printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
1301                                 KVM_MAX_VCPUS);
1302                 goto fail;
1303         }
1304
1305         r = -ENOMEM;
1306         if (!vm_base) {
1307                 printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
1308                 goto fail;
1309         }
1310         vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
1311                                         vcpu_data[id].vcpu_struct));
1312         vcpu->kvm = kvm;
1313
1314         cpu = get_cpu();
1315         r = vti_vcpu_setup(vcpu, id);
1316         put_cpu();
1317
1318         if (r) {
1319                 printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
1320                 goto fail;
1321         }
1322
1323         return vcpu;
1324 fail:
1325         return ERR_PTR(r);
1326 }
1327
1328 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1329 {
1330         return 0;
1331 }
1332
1333 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1334 {
1335         return -EINVAL;
1336 }
1337
1338 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1339 {
1340         return -EINVAL;
1341 }
1342
1343 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
1344                                         struct kvm_guest_debug *dbg)
1345 {
1346         return -EINVAL;
1347 }
1348
1349 void kvm_arch_free_vm(struct kvm *kvm)
1350 {
1351         unsigned long vm_base = kvm->arch.vm_base;
1352
1353         if (vm_base) {
1354                 memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
1355                 free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
1356         }
1357
1358 }
1359
1360 static void kvm_release_vm_pages(struct kvm *kvm)
1361 {
1362         struct kvm_memslots *slots;
1363         struct kvm_memory_slot *memslot;
1364         int j;
1365         unsigned long base_gfn;
1366
1367         slots = kvm_memslots(kvm);
1368         kvm_for_each_memslot(memslot, slots) {
1369                 base_gfn = memslot->base_gfn;
1370                 for (j = 0; j < memslot->npages; j++) {
1371                         if (memslot->rmap[j])
1372                                 put_page((struct page *)memslot->rmap[j]);
1373                 }
1374         }
1375 }
1376
1377 void kvm_arch_sync_events(struct kvm *kvm)
1378 {
1379 }
1380
1381 void kvm_arch_destroy_vm(struct kvm *kvm)
1382 {
1383         kvm_iommu_unmap_guest(kvm);
1384 #ifdef  KVM_CAP_DEVICE_ASSIGNMENT
1385         kvm_free_all_assigned_devices(kvm);
1386 #endif
1387         kfree(kvm->arch.vioapic);
1388         kvm_release_vm_pages(kvm);
1389 }
1390
1391 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
1392 {
1393 }
1394
1395 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
1396 {
1397         if (cpu != vcpu->cpu) {
1398                 vcpu->cpu = cpu;
1399                 if (vcpu->arch.ht_active)
1400                         kvm_migrate_hlt_timer(vcpu);
1401         }
1402 }
1403
1404 #define SAVE_REGS(_x)   regs->_x = vcpu->arch._x
1405
1406 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1407 {
1408         struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1409         int i;
1410
1411         vcpu_load(vcpu);
1412
1413         for (i = 0; i < 16; i++) {
1414                 regs->vpd.vgr[i] = vpd->vgr[i];
1415                 regs->vpd.vbgr[i] = vpd->vbgr[i];
1416         }
1417         for (i = 0; i < 128; i++)
1418                 regs->vpd.vcr[i] = vpd->vcr[i];
1419         regs->vpd.vhpi = vpd->vhpi;
1420         regs->vpd.vnat = vpd->vnat;
1421         regs->vpd.vbnat = vpd->vbnat;
1422         regs->vpd.vpsr = vpd->vpsr;
1423         regs->vpd.vpr = vpd->vpr;
1424
1425         memcpy(&regs->saved_guest, &vcpu->arch.guest, sizeof(union context));
1426
1427         SAVE_REGS(mp_state);
1428         SAVE_REGS(vmm_rr);
1429         memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
1430         memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
1431         SAVE_REGS(itr_regions);
1432         SAVE_REGS(dtr_regions);
1433         SAVE_REGS(tc_regions);
1434         SAVE_REGS(irq_check);
1435         SAVE_REGS(itc_check);
1436         SAVE_REGS(timer_check);
1437         SAVE_REGS(timer_pending);
1438         SAVE_REGS(last_itc);
1439         for (i = 0; i < 8; i++) {
1440                 regs->vrr[i] = vcpu->arch.vrr[i];
1441                 regs->ibr[i] = vcpu->arch.ibr[i];
1442                 regs->dbr[i] = vcpu->arch.dbr[i];
1443         }
1444         for (i = 0; i < 4; i++)
1445                 regs->insvc[i] = vcpu->arch.insvc[i];
1446         regs->saved_itc = vcpu->arch.itc_offset + kvm_get_itc(vcpu);
1447         SAVE_REGS(xtp);
1448         SAVE_REGS(metaphysical_rr0);
1449         SAVE_REGS(metaphysical_rr4);
1450         SAVE_REGS(metaphysical_saved_rr0);
1451         SAVE_REGS(metaphysical_saved_rr4);
1452         SAVE_REGS(fp_psr);
1453         SAVE_REGS(saved_gp);
1454
1455         vcpu_put(vcpu);
1456         return 0;
1457 }
1458
1459 int kvm_arch_vcpu_ioctl_get_stack(struct kvm_vcpu *vcpu,
1460                                   struct kvm_ia64_vcpu_stack *stack)
1461 {
1462         memcpy(stack, vcpu, sizeof(struct kvm_ia64_vcpu_stack));
1463         return 0;
1464 }
1465
1466 int kvm_arch_vcpu_ioctl_set_stack(struct kvm_vcpu *vcpu,
1467                                   struct kvm_ia64_vcpu_stack *stack)
1468 {
1469         memcpy(vcpu + 1, &stack->stack[0] + sizeof(struct kvm_vcpu),
1470                sizeof(struct kvm_ia64_vcpu_stack) - sizeof(struct kvm_vcpu));
1471
1472         vcpu->arch.exit_data = ((struct kvm_vcpu *)stack)->arch.exit_data;
1473         return 0;
1474 }
1475
1476 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
1477 {
1478
1479         hrtimer_cancel(&vcpu->arch.hlt_timer);
1480         kfree(vcpu->arch.apic);
1481 }
1482
1483
1484 long kvm_arch_vcpu_ioctl(struct file *filp,
1485                          unsigned int ioctl, unsigned long arg)
1486 {
1487         struct kvm_vcpu *vcpu = filp->private_data;
1488         void __user *argp = (void __user *)arg;
1489         struct kvm_ia64_vcpu_stack *stack = NULL;
1490         long r;
1491
1492         switch (ioctl) {
1493         case KVM_IA64_VCPU_GET_STACK: {
1494                 struct kvm_ia64_vcpu_stack __user *user_stack;
1495                 void __user *first_p = argp;
1496
1497                 r = -EFAULT;
1498                 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1499                         goto out;
1500
1501                 if (!access_ok(VERIFY_WRITE, user_stack,
1502                                sizeof(struct kvm_ia64_vcpu_stack))) {
1503                         printk(KERN_INFO "KVM_IA64_VCPU_GET_STACK: "
1504                                "Illegal user destination address for stack\n");
1505                         goto out;
1506                 }
1507                 stack = kzalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1508                 if (!stack) {
1509                         r = -ENOMEM;
1510                         goto out;
1511                 }
1512
1513                 r = kvm_arch_vcpu_ioctl_get_stack(vcpu, stack);
1514                 if (r)
1515                         goto out;
1516
1517                 if (copy_to_user(user_stack, stack,
1518                                  sizeof(struct kvm_ia64_vcpu_stack))) {
1519                         r = -EFAULT;
1520                         goto out;
1521                 }
1522
1523                 break;
1524         }
1525         case KVM_IA64_VCPU_SET_STACK: {
1526                 struct kvm_ia64_vcpu_stack __user *user_stack;
1527                 void __user *first_p = argp;
1528
1529                 r = -EFAULT;
1530                 if (copy_from_user(&user_stack, first_p, sizeof(void *)))
1531                         goto out;
1532
1533                 if (!access_ok(VERIFY_READ, user_stack,
1534                             sizeof(struct kvm_ia64_vcpu_stack))) {
1535                         printk(KERN_INFO "KVM_IA64_VCPU_SET_STACK: "
1536                                "Illegal user address for stack\n");
1537                         goto out;
1538                 }
1539                 stack = kmalloc(sizeof(struct kvm_ia64_vcpu_stack), GFP_KERNEL);
1540                 if (!stack) {
1541                         r = -ENOMEM;
1542                         goto out;
1543                 }
1544                 if (copy_from_user(stack, user_stack,
1545                                    sizeof(struct kvm_ia64_vcpu_stack)))
1546                         goto out;
1547
1548                 r = kvm_arch_vcpu_ioctl_set_stack(vcpu, stack);
1549                 break;
1550         }
1551
1552         default:
1553                 r = -EINVAL;
1554         }
1555
1556 out:
1557         kfree(stack);
1558         return r;
1559 }
1560
1561 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1562 {
1563         return VM_FAULT_SIGBUS;
1564 }
1565
1566 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
1567                            struct kvm_memory_slot *dont)
1568 {
1569 }
1570
1571 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
1572 {
1573         return 0;
1574 }
1575
1576 int kvm_arch_prepare_memory_region(struct kvm *kvm,
1577                 struct kvm_memory_slot *memslot,
1578                 struct kvm_memory_slot old,
1579                 struct kvm_userspace_memory_region *mem,
1580                 int user_alloc)
1581 {
1582         unsigned long i;
1583         unsigned long pfn;
1584         int npages = memslot->npages;
1585         unsigned long base_gfn = memslot->base_gfn;
1586
1587         if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
1588                 return -ENOMEM;
1589
1590         for (i = 0; i < npages; i++) {
1591                 pfn = gfn_to_pfn(kvm, base_gfn + i);
1592                 if (!kvm_is_mmio_pfn(pfn)) {
1593                         kvm_set_pmt_entry(kvm, base_gfn + i,
1594                                         pfn << PAGE_SHIFT,
1595                                 _PAGE_AR_RWX | _PAGE_MA_WB);
1596                         memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
1597                 } else {
1598                         kvm_set_pmt_entry(kvm, base_gfn + i,
1599                                         GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
1600                                         _PAGE_MA_UC);
1601                         memslot->rmap[i] = 0;
1602                         }
1603         }
1604
1605         return 0;
1606 }
1607
1608 void kvm_arch_commit_memory_region(struct kvm *kvm,
1609                 struct kvm_userspace_memory_region *mem,
1610                 struct kvm_memory_slot old,
1611                 int user_alloc)
1612 {
1613         return;
1614 }
1615
1616 void kvm_arch_flush_shadow_all(struct kvm *kvm)
1617 {
1618         kvm_flush_remote_tlbs(kvm);
1619 }
1620
1621 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
1622                                    struct kvm_memory_slot *slot)
1623 {
1624         kvm_arch_flush_shadow_all();
1625 }
1626
1627 long kvm_arch_dev_ioctl(struct file *filp,
1628                         unsigned int ioctl, unsigned long arg)
1629 {
1630         return -EINVAL;
1631 }
1632
1633 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
1634 {
1635         kvm_vcpu_uninit(vcpu);
1636 }
1637
1638 static int vti_cpu_has_kvm_support(void)
1639 {
1640         long  avail = 1, status = 1, control = 1;
1641         long ret;
1642
1643         ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
1644         if (ret)
1645                 goto out;
1646
1647         if (!(avail & PAL_PROC_VM_BIT))
1648                 goto out;
1649
1650         printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
1651
1652         ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
1653         if (ret)
1654                 goto out;
1655         printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
1656
1657         if (!(vp_env_info & VP_OPCODE)) {
1658                 printk(KERN_WARNING"kvm: No opcode ability on hardware, "
1659                                 "vm_env_info:0x%lx\n", vp_env_info);
1660         }
1661
1662         return 1;
1663 out:
1664         return 0;
1665 }
1666
1667
1668 /*
1669  * On SN2, the ITC isn't stable, so copy in fast path code to use the
1670  * SN2 RTC, replacing the ITC based default verion.
1671  */
1672 static void kvm_patch_vmm(struct kvm_vmm_info *vmm_info,
1673                           struct module *module)
1674 {
1675         unsigned long new_ar, new_ar_sn2;
1676         unsigned long module_base;
1677
1678         if (!ia64_platform_is("sn2"))
1679                 return;
1680
1681         module_base = (unsigned long)module->module_core;
1682
1683         new_ar = kvm_vmm_base + vmm_info->patch_mov_ar - module_base;
1684         new_ar_sn2 = kvm_vmm_base + vmm_info->patch_mov_ar_sn2 - module_base;
1685
1686         printk(KERN_INFO "kvm: Patching ITC emulation to use SGI SN2 RTC "
1687                "as source\n");
1688
1689         /*
1690          * Copy the SN2 version of mov_ar into place. They are both
1691          * the same size, so 6 bundles is sufficient (6 * 0x10).
1692          */
1693         memcpy((void *)new_ar, (void *)new_ar_sn2, 0x60);
1694 }
1695
1696 static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
1697                             struct module *module)
1698 {
1699         unsigned long module_base;
1700         unsigned long vmm_size;
1701
1702         unsigned long vmm_offset, func_offset, fdesc_offset;
1703         struct fdesc *p_fdesc;
1704
1705         BUG_ON(!module);
1706
1707         if (!kvm_vmm_base) {
1708                 printk("kvm: kvm area hasn't been initialized yet!!\n");
1709                 return -EFAULT;
1710         }
1711
1712         /*Calculate new position of relocated vmm module.*/
1713         module_base = (unsigned long)module->module_core;
1714         vmm_size = module->core_size;
1715         if (unlikely(vmm_size > KVM_VMM_SIZE))
1716                 return -EFAULT;
1717
1718         memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
1719         kvm_patch_vmm(vmm_info, module);
1720         kvm_flush_icache(kvm_vmm_base, vmm_size);
1721
1722         /*Recalculate kvm_vmm_info based on new VMM*/
1723         vmm_offset = vmm_info->vmm_ivt - module_base;
1724         kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
1725         printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
1726                         kvm_vmm_info->vmm_ivt);
1727
1728         fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
1729         kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
1730                                                         fdesc_offset);
1731         func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
1732         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1733         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1734         p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
1735
1736         printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
1737                         KVM_VMM_BASE+func_offset);
1738
1739         fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
1740         kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
1741                         fdesc_offset);
1742         func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
1743         p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
1744         p_fdesc->ip = KVM_VMM_BASE + func_offset;
1745         p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
1746
1747         kvm_vmm_gp = p_fdesc->gp;
1748
1749         printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
1750                                                 kvm_vmm_info->vmm_entry);
1751         printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
1752                                                 KVM_VMM_BASE + func_offset);
1753
1754         return 0;
1755 }
1756
1757 int kvm_arch_init(void *opaque)
1758 {
1759         int r;
1760         struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
1761
1762         if (!vti_cpu_has_kvm_support()) {
1763                 printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
1764                 r = -EOPNOTSUPP;
1765                 goto out;
1766         }
1767
1768         if (kvm_vmm_info) {
1769                 printk(KERN_ERR "kvm: Already loaded VMM module!\n");
1770                 r = -EEXIST;
1771                 goto out;
1772         }
1773
1774         r = -ENOMEM;
1775         kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
1776         if (!kvm_vmm_info)
1777                 goto out;
1778
1779         if (kvm_alloc_vmm_area())
1780                 goto out_free0;
1781
1782         r = kvm_relocate_vmm(vmm_info, vmm_info->module);
1783         if (r)
1784                 goto out_free1;
1785
1786         return 0;
1787
1788 out_free1:
1789         kvm_free_vmm_area();
1790 out_free0:
1791         kfree(kvm_vmm_info);
1792 out:
1793         return r;
1794 }
1795
1796 void kvm_arch_exit(void)
1797 {
1798         kvm_free_vmm_area();
1799         kfree(kvm_vmm_info);
1800         kvm_vmm_info = NULL;
1801 }
1802
1803 static void kvm_ia64_sync_dirty_log(struct kvm *kvm,
1804                                     struct kvm_memory_slot *memslot)
1805 {
1806         int i;
1807         long base;
1808         unsigned long n;
1809         unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
1810                         offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
1811
1812         n = kvm_dirty_bitmap_bytes(memslot);
1813         base = memslot->base_gfn / BITS_PER_LONG;
1814
1815         spin_lock(&kvm->arch.dirty_log_lock);
1816         for (i = 0; i < n/sizeof(long); ++i) {
1817                 memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
1818                 dirty_bitmap[base + i] = 0;
1819         }
1820         spin_unlock(&kvm->arch.dirty_log_lock);
1821 }
1822
1823 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1824                 struct kvm_dirty_log *log)
1825 {
1826         int r;
1827         unsigned long n;
1828         struct kvm_memory_slot *memslot;
1829         int is_dirty = 0;
1830
1831         mutex_lock(&kvm->slots_lock);
1832
1833         r = -EINVAL;
1834         if (log->slot >= KVM_MEMORY_SLOTS)
1835                 goto out;
1836
1837         memslot = id_to_memslot(kvm->memslots, log->slot);
1838         r = -ENOENT;
1839         if (!memslot->dirty_bitmap)
1840                 goto out;
1841
1842         kvm_ia64_sync_dirty_log(kvm, memslot);
1843         r = kvm_get_dirty_log(kvm, log, &is_dirty);
1844         if (r)
1845                 goto out;
1846
1847         /* If nothing is dirty, don't bother messing with page tables. */
1848         if (is_dirty) {
1849                 kvm_flush_remote_tlbs(kvm);
1850                 n = kvm_dirty_bitmap_bytes(memslot);
1851                 memset(memslot->dirty_bitmap, 0, n);
1852         }
1853         r = 0;
1854 out:
1855         mutex_unlock(&kvm->slots_lock);
1856         return r;
1857 }
1858
1859 int kvm_arch_hardware_setup(void)
1860 {
1861         return 0;
1862 }
1863
1864 void kvm_arch_hardware_unsetup(void)
1865 {
1866 }
1867
1868 int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq)
1869 {
1870         return __apic_accept_irq(vcpu, irq->vector);
1871 }
1872
1873 int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
1874 {
1875         return apic->vcpu->vcpu_id == dest;
1876 }
1877
1878 int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
1879 {
1880         return 0;
1881 }
1882
1883 int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2)
1884 {
1885         return vcpu1->arch.xtp - vcpu2->arch.xtp;
1886 }
1887
1888 int kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
1889                 int short_hand, int dest, int dest_mode)
1890 {
1891         struct kvm_lapic *target = vcpu->arch.apic;
1892         return (dest_mode == 0) ?
1893                 kvm_apic_match_physical_addr(target, dest) :
1894                 kvm_apic_match_logical_addr(target, dest);
1895 }
1896
1897 static int find_highest_bits(int *dat)
1898 {
1899         u32  bits, bitnum;
1900         int i;
1901
1902         /* loop for all 256 bits */
1903         for (i = 7; i >= 0 ; i--) {
1904                 bits = dat[i];
1905                 if (bits) {
1906                         bitnum = fls(bits);
1907                         return i * 32 + bitnum - 1;
1908                 }
1909         }
1910
1911         return -1;
1912 }
1913
1914 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
1915 {
1916     struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
1917
1918     if (vpd->irr[0] & (1UL << NMI_VECTOR))
1919                 return NMI_VECTOR;
1920     if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
1921                 return ExtINT_VECTOR;
1922
1923     return find_highest_bits((int *)&vpd->irr[0]);
1924 }
1925
1926 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
1927 {
1928         return vcpu->arch.timer_fired;
1929 }
1930
1931 int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
1932 {
1933         return (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) ||
1934                 (kvm_highest_pending_irq(vcpu) != -1);
1935 }
1936
1937 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
1938 {
1939         return (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests));
1940 }
1941
1942 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
1943                                     struct kvm_mp_state *mp_state)
1944 {
1945         mp_state->mp_state = vcpu->arch.mp_state;
1946         return 0;
1947 }
1948
1949 static int vcpu_reset(struct kvm_vcpu *vcpu)
1950 {
1951         int r;
1952         long psr;
1953         local_irq_save(psr);
1954         r = kvm_insert_vmm_mapping(vcpu);
1955         local_irq_restore(psr);
1956         if (r)
1957                 goto fail;
1958
1959         vcpu->arch.launched = 0;
1960         kvm_arch_vcpu_uninit(vcpu);
1961         r = kvm_arch_vcpu_init(vcpu);
1962         if (r)
1963                 goto fail;
1964
1965         kvm_purge_vmm_mapping(vcpu);
1966         r = 0;
1967 fail:
1968         return r;
1969 }
1970
1971 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
1972                                     struct kvm_mp_state *mp_state)
1973 {
1974         int r = 0;
1975
1976         vcpu->arch.mp_state = mp_state->mp_state;
1977         if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
1978                 r = vcpu_reset(vcpu);
1979         return r;
1980 }