arch/ia64/kvm/kvm-ia64.c

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