arch/powerpc/kvm/book3s.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
   4  *
   5  * Authors:
   6  *    Alexander Graf <[email protected]>
   7  *    Kevin Wolf <[email protected]>
   8  *
   9  * Description:
  10  * This file is derived from arch/powerpc/kvm/44x.c,
  11  * by Hollis Blanchard <[email protected]>.
  12  */
  13
  14 #include <linux/kvm_host.h>
  15 #include <linux/err.h>
  16 #include <linux/export.h>
  17 #include <linux/slab.h>
  18 #include <linux/module.h>
  19 #include <linux/miscdevice.h>
  20 #include <linux/gfp.h>
  21 #include <linux/sched.h>
  22 #include <linux/vmalloc.h>
  23 #include <linux/highmem.h>
  24
  25 #include <asm/reg.h>
  26 #include <asm/cputable.h>
  27 #include <asm/cacheflush.h>
  28 #include <linux/uaccess.h>
  29 #include <asm/io.h>
  30 #include <asm/kvm_ppc.h>
  31 #include <asm/kvm_book3s.h>
  32 #include <asm/mmu_context.h>
  33 #include <asm/page.h>
  34 #include <asm/xive.h>
  35
  36 #include "book3s.h"
  37 #include "trace.h"
  38
  39 /* #define EXIT_DEBUG */
  40
  41 struct kvm_stats_debugfs_item debugfs_entries[] = {
  42         VCPU_STAT("exits", sum_exits),
  43         VCPU_STAT("mmio", mmio_exits),
  44         VCPU_STAT("sig", signal_exits),
  45         VCPU_STAT("sysc", syscall_exits),
  46         VCPU_STAT("inst_emu", emulated_inst_exits),
  47         VCPU_STAT("dec", dec_exits),
  48         VCPU_STAT("ext_intr", ext_intr_exits),
  49         VCPU_STAT("queue_intr", queue_intr),
  50         VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns),
  51         VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns),
  52         VCPU_STAT("halt_wait_ns", halt_wait_ns),
  53         VCPU_STAT("halt_successful_poll", halt_successful_poll),
  54         VCPU_STAT("halt_attempted_poll", halt_attempted_poll),
  55         VCPU_STAT("halt_successful_wait", halt_successful_wait),
  56         VCPU_STAT("halt_poll_invalid", halt_poll_invalid),
  57         VCPU_STAT("halt_wakeup", halt_wakeup),
  58         VCPU_STAT("pf_storage", pf_storage),
  59         VCPU_STAT("sp_storage", sp_storage),
  60         VCPU_STAT("pf_instruc", pf_instruc),
  61         VCPU_STAT("sp_instruc", sp_instruc),
  62         VCPU_STAT("ld", ld),
  63         VCPU_STAT("ld_slow", ld_slow),
  64         VCPU_STAT("st", st),
  65         VCPU_STAT("st_slow", st_slow),
  66         VCPU_STAT("pthru_all", pthru_all),
  67         VCPU_STAT("pthru_host", pthru_host),
  68         VCPU_STAT("pthru_bad_aff", pthru_bad_aff),
  69         VM_STAT("largepages_2M", num_2M_pages, .mode = 0444),
  70         VM_STAT("largepages_1G", num_1G_pages, .mode = 0444),
  71         { NULL }
  72 };
  73
  74 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
  75                         unsigned long pending_now, unsigned long old_pending)
  76 {
  77         if (is_kvmppc_hv_enabled(vcpu->kvm))
  78                 return;
  79         if (pending_now)
  80                 kvmppc_set_int_pending(vcpu, 1);
  81         else if (old_pending)
  82                 kvmppc_set_int_pending(vcpu, 0);
  83 }
  84
  85 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
  86 {
  87         ulong crit_raw;
  88         ulong crit_r1;
  89         bool crit;
  90
  91         if (is_kvmppc_hv_enabled(vcpu->kvm))
  92                 return false;
  93
  94         crit_raw = kvmppc_get_critical(vcpu);
  95         crit_r1 = kvmppc_get_gpr(vcpu, 1);
  96
  97         /* Truncate crit indicators in 32 bit mode */
  98         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
  99                 crit_raw &= 0xffffffff;
 100                 crit_r1 &= 0xffffffff;
 101         }
 102
 103         /* Critical section when crit == r1 */
 104         crit = (crit_raw == crit_r1);
 105         /* ... and we're in supervisor mode */
 106         crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
 107
 108         return crit;
 109 }
 110
 111 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
 112 {
 113         vcpu->kvm->arch.kvm_ops->inject_interrupt(vcpu, vec, flags);
 114 }
 115
 116 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
 117 {
 118         unsigned int prio;
 119
 120         switch (vec) {
 121         case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;         break;
 122         case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;        break;
 123         case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;         break;
 124         case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;         break;
 125         case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;         break;
 126         case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;         break;
 127         case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;             break;
 128         case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;            break;
 129         case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;              break;
 130         case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;           break;
 131         case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;          break;
 132         case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;              break;
 133         case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;                break;
 134         case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;              break;
 135         case 0xf40: prio = BOOK3S_IRQPRIO_VSX;                  break;
 136         case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL;          break;
 137         default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
 138         }
 139
 140         return prio;
 141 }
 142
 143 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 144                                           unsigned int vec)
 145 {
 146         unsigned long old_pending = vcpu->arch.pending_exceptions;
 147
 148         clear_bit(kvmppc_book3s_vec2irqprio(vec),
 149                   &vcpu->arch.pending_exceptions);
 150
 151         kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
 152                                   old_pending);
 153 }
 154
 155 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
 156 {
 157         vcpu->stat.queue_intr++;
 158
 159         set_bit(kvmppc_book3s_vec2irqprio(vec),
 160                 &vcpu->arch.pending_exceptions);
 161 #ifdef EXIT_DEBUG
 162         printk(KERN_INFO "Queueing interrupt %x\n", vec);
 163 #endif
 164 }
 165 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
 166
 167 void kvmppc_core_queue_machine_check(struct kvm_vcpu *vcpu, ulong flags)
 168 {
 169         /* might as well deliver this straight away */
 170         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_MACHINE_CHECK, flags);
 171 }
 172 EXPORT_SYMBOL_GPL(kvmppc_core_queue_machine_check);
 173
 174 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
 175 {
 176         /* might as well deliver this straight away */
 177         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
 178 }
 179 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
 180
 181 void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu)
 182 {
 183         /* might as well deliver this straight away */
 184         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, 0);
 185 }
 186
 187 void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu)
 188 {
 189         /* might as well deliver this straight away */
 190         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_ALTIVEC, 0);
 191 }
 192
 193 void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu)
 194 {
 195         /* might as well deliver this straight away */
 196         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_VSX, 0);
 197 }
 198
 199 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 200 {
 201         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 202 }
 203 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
 204
 205 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 206 {
 207         return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 208 }
 209 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
 210
 211 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 212 {
 213         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 214 }
 215 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
 216
 217 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 218                                 struct kvm_interrupt *irq)
 219 {
 220         /*
 221          * This case (KVM_INTERRUPT_SET) should never actually arise for
 222          * a pseries guest (because pseries guests expect their interrupt
 223          * controllers to continue asserting an external interrupt request
 224          * until it is acknowledged at the interrupt controller), but is
 225          * included to avoid ABI breakage and potentially for other
 226          * sorts of guest.
 227          *
 228          * There is a subtlety here: HV KVM does not test the
 229          * external_oneshot flag in the code that synthesizes
 230          * external interrupts for the guest just before entering
 231          * the guest.  That is OK even if userspace did do a
 232          * KVM_INTERRUPT_SET on a pseries guest vcpu, because the
 233          * caller (kvm_vcpu_ioctl_interrupt) does a kvm_vcpu_kick()
 234          * which ends up doing a smp_send_reschedule(), which will
 235          * pull the guest all the way out to the host, meaning that
 236          * we will call kvmppc_core_prepare_to_enter() before entering
 237          * the guest again, and that will handle the external_oneshot
 238          * flag correctly.
 239          */
 240         if (irq->irq == KVM_INTERRUPT_SET)
 241                 vcpu->arch.external_oneshot = 1;
 242
 243         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 244 }
 245
 246 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 247 {
 248         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 249 }
 250
 251 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
 252                                     ulong flags)
 253 {
 254         kvmppc_set_dar(vcpu, dar);
 255         kvmppc_set_dsisr(vcpu, flags);
 256         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0);
 257 }
 258 EXPORT_SYMBOL_GPL(kvmppc_core_queue_data_storage);
 259
 260 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
 261 {
 262         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE, flags);
 263 }
 264 EXPORT_SYMBOL_GPL(kvmppc_core_queue_inst_storage);
 265
 266 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
 267                                          unsigned int priority)
 268 {
 269         int deliver = 1;
 270         int vec = 0;
 271         bool crit = kvmppc_critical_section(vcpu);
 272
 273         switch (priority) {
 274         case BOOK3S_IRQPRIO_DECREMENTER:
 275                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 276                 vec = BOOK3S_INTERRUPT_DECREMENTER;
 277                 break;
 278         case BOOK3S_IRQPRIO_EXTERNAL:
 279                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 280                 vec = BOOK3S_INTERRUPT_EXTERNAL;
 281                 break;
 282         case BOOK3S_IRQPRIO_SYSTEM_RESET:
 283                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
 284                 break;
 285         case BOOK3S_IRQPRIO_MACHINE_CHECK:
 286                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
 287                 break;
 288         case BOOK3S_IRQPRIO_DATA_STORAGE:
 289                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
 290                 break;
 291         case BOOK3S_IRQPRIO_INST_STORAGE:
 292                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
 293                 break;
 294         case BOOK3S_IRQPRIO_DATA_SEGMENT:
 295                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
 296                 break;
 297         case BOOK3S_IRQPRIO_INST_SEGMENT:
 298                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
 299                 break;
 300         case BOOK3S_IRQPRIO_ALIGNMENT:
 301                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
 302                 break;
 303         case BOOK3S_IRQPRIO_PROGRAM:
 304                 vec = BOOK3S_INTERRUPT_PROGRAM;
 305                 break;
 306         case BOOK3S_IRQPRIO_VSX:
 307                 vec = BOOK3S_INTERRUPT_VSX;
 308                 break;
 309         case BOOK3S_IRQPRIO_ALTIVEC:
 310                 vec = BOOK3S_INTERRUPT_ALTIVEC;
 311                 break;
 312         case BOOK3S_IRQPRIO_FP_UNAVAIL:
 313                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
 314                 break;
 315         case BOOK3S_IRQPRIO_SYSCALL:
 316                 vec = BOOK3S_INTERRUPT_SYSCALL;
 317                 break;
 318         case BOOK3S_IRQPRIO_DEBUG:
 319                 vec = BOOK3S_INTERRUPT_TRACE;
 320                 break;
 321         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
 322                 vec = BOOK3S_INTERRUPT_PERFMON;
 323                 break;
 324         case BOOK3S_IRQPRIO_FAC_UNAVAIL:
 325                 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
 326                 break;
 327         default:
 328                 deliver = 0;
 329                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
 330                 break;
 331         }
 332
 333 #if 0
 334         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
 335 #endif
 336
 337         if (deliver)
 338                 kvmppc_inject_interrupt(vcpu, vec, 0);
 339
 340         return deliver;
 341 }
 342
 343 /*
 344  * This function determines if an irqprio should be cleared once issued.
 345  */
 346 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
 347 {
 348         switch (priority) {
 349                 case BOOK3S_IRQPRIO_DECREMENTER:
 350                         /* DEC interrupts get cleared by mtdec */
 351                         return false;
 352                 case BOOK3S_IRQPRIO_EXTERNAL:
 353                         /*
 354                          * External interrupts get cleared by userspace
 355                          * except when set by the KVM_INTERRUPT ioctl with
 356                          * KVM_INTERRUPT_SET (not KVM_INTERRUPT_SET_LEVEL).
 357                          */
 358                         if (vcpu->arch.external_oneshot) {
 359                                 vcpu->arch.external_oneshot = 0;
 360                                 return true;
 361                         }
 362                         return false;
 363         }
 364
 365         return true;
 366 }
 367
 368 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 369 {
 370         unsigned long *pending = &vcpu->arch.pending_exceptions;
 371         unsigned long old_pending = vcpu->arch.pending_exceptions;
 372         unsigned int priority;
 373
 374 #ifdef EXIT_DEBUG
 375         if (vcpu->arch.pending_exceptions)
 376                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
 377 #endif
 378         priority = __ffs(*pending);
 379         while (priority < BOOK3S_IRQPRIO_MAX) {
 380                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
 381                     clear_irqprio(vcpu, priority)) {
 382                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 383                         break;
 384                 }
 385
 386                 priority = find_next_bit(pending,
 387                                          BITS_PER_BYTE * sizeof(*pending),
 388                                          priority + 1);
 389         }
 390
 391         /* Tell the guest about our interrupt status */
 392         kvmppc_update_int_pending(vcpu, *pending, old_pending);
 393
 394         return 0;
 395 }
 396 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
 397
 398 kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
 399                         bool *writable)
 400 {
 401         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
 402         gfn_t gfn = gpa >> PAGE_SHIFT;
 403
 404         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 405                 mp_pa = (uint32_t)mp_pa;
 406
 407         /* Magic page override */
 408         gpa &= ~0xFFFULL;
 409         if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
 410                 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
 411                 kvm_pfn_t pfn;
 412
 413                 pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
 414                 get_page(pfn_to_page(pfn));
 415                 if (writable)
 416                         *writable = true;
 417                 return pfn;
 418         }
 419
 420         return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
 421 }
 422 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
 423
 424 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
 425                  enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
 426 {
 427         bool data = (xlid == XLATE_DATA);
 428         bool iswrite = (xlrw == XLATE_WRITE);
 429         int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
 430         int r;
 431
 432         if (relocated) {
 433                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
 434         } else {
 435                 pte->eaddr = eaddr;
 436                 pte->raddr = eaddr & KVM_PAM;
 437                 pte->vpage = VSID_REAL | eaddr >> 12;
 438                 pte->may_read = true;
 439                 pte->may_write = true;
 440                 pte->may_execute = true;
 441                 r = 0;
 442
 443                 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
 444                     !data) {
 445                         if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
 446                             ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
 447                         pte->raddr &= ~SPLIT_HACK_MASK;
 448                 }
 449         }
 450
 451         return r;
 452 }
 453
 454 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu,
 455                 enum instruction_fetch_type type, u32 *inst)
 456 {
 457         ulong pc = kvmppc_get_pc(vcpu);
 458         int r;
 459
 460         if (type == INST_SC)
 461                 pc -= 4;
 462
 463         r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
 464         if (r == EMULATE_DONE)
 465                 return r;
 466         else
 467                 return EMULATE_AGAIN;
 468 }
 469 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
 470
 471 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
 472 {
 473         return 0;
 474 }
 475
 476 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
 477 {
 478 }
 479
 480 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 481                                   struct kvm_sregs *sregs)
 482 {
 483         int ret;
 484
 485         vcpu_load(vcpu);
 486         ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
 487         vcpu_put(vcpu);
 488
 489         return ret;
 490 }
 491
 492 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 493                                   struct kvm_sregs *sregs)
 494 {
 495         int ret;
 496
 497         vcpu_load(vcpu);
 498         ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
 499         vcpu_put(vcpu);
 500
 501         return ret;
 502 }
 503
 504 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 505 {
 506         int i;
 507
 508         regs->pc = kvmppc_get_pc(vcpu);
 509         regs->cr = kvmppc_get_cr(vcpu);
 510         regs->ctr = kvmppc_get_ctr(vcpu);
 511         regs->lr = kvmppc_get_lr(vcpu);
 512         regs->xer = kvmppc_get_xer(vcpu);
 513         regs->msr = kvmppc_get_msr(vcpu);
 514         regs->srr0 = kvmppc_get_srr0(vcpu);
 515         regs->srr1 = kvmppc_get_srr1(vcpu);
 516         regs->pid = vcpu->arch.pid;
 517         regs->sprg0 = kvmppc_get_sprg0(vcpu);
 518         regs->sprg1 = kvmppc_get_sprg1(vcpu);
 519         regs->sprg2 = kvmppc_get_sprg2(vcpu);
 520         regs->sprg3 = kvmppc_get_sprg3(vcpu);
 521         regs->sprg4 = kvmppc_get_sprg4(vcpu);
 522         regs->sprg5 = kvmppc_get_sprg5(vcpu);
 523         regs->sprg6 = kvmppc_get_sprg6(vcpu);
 524         regs->sprg7 = kvmppc_get_sprg7(vcpu);
 525
 526         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 527                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 528
 529         return 0;
 530 }
 531
 532 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 533 {
 534         int i;
 535
 536         kvmppc_set_pc(vcpu, regs->pc);
 537         kvmppc_set_cr(vcpu, regs->cr);
 538         kvmppc_set_ctr(vcpu, regs->ctr);
 539         kvmppc_set_lr(vcpu, regs->lr);
 540         kvmppc_set_xer(vcpu, regs->xer);
 541         kvmppc_set_msr(vcpu, regs->msr);
 542         kvmppc_set_srr0(vcpu, regs->srr0);
 543         kvmppc_set_srr1(vcpu, regs->srr1);
 544         kvmppc_set_sprg0(vcpu, regs->sprg0);
 545         kvmppc_set_sprg1(vcpu, regs->sprg1);
 546         kvmppc_set_sprg2(vcpu, regs->sprg2);
 547         kvmppc_set_sprg3(vcpu, regs->sprg3);
 548         kvmppc_set_sprg4(vcpu, regs->sprg4);
 549         kvmppc_set_sprg5(vcpu, regs->sprg5);
 550         kvmppc_set_sprg6(vcpu, regs->sprg6);
 551         kvmppc_set_sprg7(vcpu, regs->sprg7);
 552
 553         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 554                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 555
 556         return 0;
 557 }
 558
 559 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 560 {
 561         return -EOPNOTSUPP;
 562 }
 563
 564 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 565 {
 566         return -EOPNOTSUPP;
 567 }
 568
 569 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
 570                         union kvmppc_one_reg *val)
 571 {
 572         int r = 0;
 573         long int i;
 574
 575         r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
 576         if (r == -EINVAL) {
 577                 r = 0;
 578                 switch (id) {
 579                 case KVM_REG_PPC_DAR:
 580                         *val = get_reg_val(id, kvmppc_get_dar(vcpu));
 581                         break;
 582                 case KVM_REG_PPC_DSISR:
 583                         *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
 584                         break;
 585                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 586                         i = id - KVM_REG_PPC_FPR0;
 587                         *val = get_reg_val(id, VCPU_FPR(vcpu, i));
 588                         break;
 589                 case KVM_REG_PPC_FPSCR:
 590                         *val = get_reg_val(id, vcpu->arch.fp.fpscr);
 591                         break;
 592 #ifdef CONFIG_VSX
 593                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 594                         if (cpu_has_feature(CPU_FTR_VSX)) {
 595                                 i = id - KVM_REG_PPC_VSR0;
 596                                 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
 597                                 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
 598                         } else {
 599                                 r = -ENXIO;
 600                         }
 601                         break;
 602 #endif /* CONFIG_VSX */
 603                 case KVM_REG_PPC_DEBUG_INST:
 604                         *val = get_reg_val(id, INS_TW);
 605                         break;
 606 #ifdef CONFIG_KVM_XICS
 607                 case KVM_REG_PPC_ICP_STATE:
 608                         if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
 609                                 r = -ENXIO;
 610                                 break;
 611                         }
 612                         if (xics_on_xive())
 613                                 *val = get_reg_val(id, kvmppc_xive_get_icp(vcpu));
 614                         else
 615                                 *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
 616                         break;
 617 #endif /* CONFIG_KVM_XICS */
 618 #ifdef CONFIG_KVM_XIVE
 619                 case KVM_REG_PPC_VP_STATE:
 620                         if (!vcpu->arch.xive_vcpu) {
 621                                 r = -ENXIO;
 622                                 break;
 623                         }
 624                         if (xive_enabled())
 625                                 r = kvmppc_xive_native_get_vp(vcpu, val);
 626                         else
 627                                 r = -ENXIO;
 628                         break;
 629 #endif /* CONFIG_KVM_XIVE */
 630                 case KVM_REG_PPC_FSCR:
 631                         *val = get_reg_val(id, vcpu->arch.fscr);
 632                         break;
 633                 case KVM_REG_PPC_TAR:
 634                         *val = get_reg_val(id, vcpu->arch.tar);
 635                         break;
 636                 case KVM_REG_PPC_EBBHR:
 637                         *val = get_reg_val(id, vcpu->arch.ebbhr);
 638                         break;
 639                 case KVM_REG_PPC_EBBRR:
 640                         *val = get_reg_val(id, vcpu->arch.ebbrr);
 641                         break;
 642                 case KVM_REG_PPC_BESCR:
 643                         *val = get_reg_val(id, vcpu->arch.bescr);
 644                         break;
 645                 case KVM_REG_PPC_IC:
 646                         *val = get_reg_val(id, vcpu->arch.ic);
 647                         break;
 648                 default:
 649                         r = -EINVAL;
 650                         break;
 651                 }
 652         }
 653
 654         return r;
 655 }
 656
 657 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
 658                         union kvmppc_one_reg *val)
 659 {
 660         int r = 0;
 661         long int i;
 662
 663         r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
 664         if (r == -EINVAL) {
 665                 r = 0;
 666                 switch (id) {
 667                 case KVM_REG_PPC_DAR:
 668                         kvmppc_set_dar(vcpu, set_reg_val(id, *val));
 669                         break;
 670                 case KVM_REG_PPC_DSISR:
 671                         kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
 672                         break;
 673                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 674                         i = id - KVM_REG_PPC_FPR0;
 675                         VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
 676                         break;
 677                 case KVM_REG_PPC_FPSCR:
 678                         vcpu->arch.fp.fpscr = set_reg_val(id, *val);
 679                         break;
 680 #ifdef CONFIG_VSX
 681                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 682                         if (cpu_has_feature(CPU_FTR_VSX)) {
 683                                 i = id - KVM_REG_PPC_VSR0;
 684                                 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
 685                                 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
 686                         } else {
 687                                 r = -ENXIO;
 688                         }
 689                         break;
 690 #endif /* CONFIG_VSX */
 691 #ifdef CONFIG_KVM_XICS
 692                 case KVM_REG_PPC_ICP_STATE:
 693                         if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
 694                                 r = -ENXIO;
 695                                 break;
 696                         }
 697                         if (xics_on_xive())
 698                                 r = kvmppc_xive_set_icp(vcpu, set_reg_val(id, *val));
 699                         else
 700                                 r = kvmppc_xics_set_icp(vcpu, set_reg_val(id, *val));
 701                         break;
 702 #endif /* CONFIG_KVM_XICS */
 703 #ifdef CONFIG_KVM_XIVE
 704                 case KVM_REG_PPC_VP_STATE:
 705                         if (!vcpu->arch.xive_vcpu) {
 706                                 r = -ENXIO;
 707                                 break;
 708                         }
 709                         if (xive_enabled())
 710                                 r = kvmppc_xive_native_set_vp(vcpu, val);
 711                         else
 712                                 r = -ENXIO;
 713                         break;
 714 #endif /* CONFIG_KVM_XIVE */
 715                 case KVM_REG_PPC_FSCR:
 716                         vcpu->arch.fscr = set_reg_val(id, *val);
 717                         break;
 718                 case KVM_REG_PPC_TAR:
 719                         vcpu->arch.tar = set_reg_val(id, *val);
 720                         break;
 721                 case KVM_REG_PPC_EBBHR:
 722                         vcpu->arch.ebbhr = set_reg_val(id, *val);
 723                         break;
 724                 case KVM_REG_PPC_EBBRR:
 725                         vcpu->arch.ebbrr = set_reg_val(id, *val);
 726                         break;
 727                 case KVM_REG_PPC_BESCR:
 728                         vcpu->arch.bescr = set_reg_val(id, *val);
 729                         break;
 730                 case KVM_REG_PPC_IC:
 731                         vcpu->arch.ic = set_reg_val(id, *val);
 732                         break;
 733                 default:
 734                         r = -EINVAL;
 735                         break;
 736                 }
 737         }
 738
 739         return r;
 740 }
 741
 742 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 743 {
 744         vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
 745 }
 746
 747 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
 748 {
 749         vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
 750 }
 751
 752 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 753 {
 754         vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
 755 }
 756 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
 757
 758 int kvmppc_vcpu_run(struct kvm_vcpu *vcpu)
 759 {
 760         return vcpu->kvm->arch.kvm_ops->vcpu_run(vcpu);
 761 }
 762
 763 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 764                                   struct kvm_translation *tr)
 765 {
 766         return 0;
 767 }
 768
 769 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 770                                         struct kvm_guest_debug *dbg)
 771 {
 772         vcpu_load(vcpu);
 773         vcpu->guest_debug = dbg->control;
 774         vcpu_put(vcpu);
 775         return 0;
 776 }
 777
 778 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
 779 {
 780         kvmppc_core_queue_dec(vcpu);
 781         kvm_vcpu_kick(vcpu);
 782 }
 783
 784 int kvmppc_core_vcpu_create(struct kvm_vcpu *vcpu)
 785 {
 786         return vcpu->kvm->arch.kvm_ops->vcpu_create(vcpu);
 787 }
 788
 789 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 790 {
 791         vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
 792 }
 793
 794 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 795 {
 796         return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
 797 }
 798
 799 void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
 800 {
 801
 802 }
 803
 804 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 805 {
 806         return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
 807 }
 808
 809 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
 810 {
 811         kvm->arch.kvm_ops->free_memslot(slot);
 812 }
 813
 814 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
 815 {
 816         kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
 817 }
 818
 819 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
 820                                 struct kvm_memory_slot *memslot,
 821                                 const struct kvm_userspace_memory_region *mem,
 822                                 enum kvm_mr_change change)
 823 {
 824         return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem,
 825                                                         change);
 826 }
 827
 828 void kvmppc_core_commit_memory_region(struct kvm *kvm,
 829                                 const struct kvm_userspace_memory_region *mem,
 830                                 const struct kvm_memory_slot *old,
 831                                 const struct kvm_memory_slot *new,
 832                                 enum kvm_mr_change change)
 833 {
 834         kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new, change);
 835 }
 836
 837 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end,
 838                         unsigned flags)
 839 {
 840         return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
 841 }
 842
 843 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
 844 {
 845         return kvm->arch.kvm_ops->age_hva(kvm, start, end);
 846 }
 847
 848 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
 849 {
 850         return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
 851 }
 852
 853 int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 854 {
 855         kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
 856         return 0;
 857 }
 858
 859 int kvmppc_core_init_vm(struct kvm *kvm)
 860 {
 861
 862 #ifdef CONFIG_PPC64
 863         INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
 864         INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
 865         mutex_init(&kvm->arch.rtas_token_lock);
 866 #endif
 867
 868         return kvm->arch.kvm_ops->init_vm(kvm);
 869 }
 870
 871 void kvmppc_core_destroy_vm(struct kvm *kvm)
 872 {
 873         kvm->arch.kvm_ops->destroy_vm(kvm);
 874
 875 #ifdef CONFIG_PPC64
 876         kvmppc_rtas_tokens_free(kvm);
 877         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
 878 #endif
 879
 880 #ifdef CONFIG_KVM_XICS
 881         /*
 882          * Free the XIVE and XICS devices which are not directly freed by the
 883          * device 'release' method
 884          */
 885         kfree(kvm->arch.xive_devices.native);
 886         kvm->arch.xive_devices.native = NULL;
 887         kfree(kvm->arch.xive_devices.xics_on_xive);
 888         kvm->arch.xive_devices.xics_on_xive = NULL;
 889         kfree(kvm->arch.xics_device);
 890         kvm->arch.xics_device = NULL;
 891 #endif /* CONFIG_KVM_XICS */
 892 }
 893
 894 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
 895 {
 896         unsigned long size = kvmppc_get_gpr(vcpu, 4);
 897         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 898         u64 buf;
 899         int srcu_idx;
 900         int ret;
 901
 902         if (!is_power_of_2(size) || (size > sizeof(buf)))
 903                 return H_TOO_HARD;
 904
 905         srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 906         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 907         srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
 908         if (ret != 0)
 909                 return H_TOO_HARD;
 910
 911         switch (size) {
 912         case 1:
 913                 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
 914                 break;
 915
 916         case 2:
 917                 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
 918                 break;
 919
 920         case 4:
 921                 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
 922                 break;
 923
 924         case 8:
 925                 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
 926                 break;
 927
 928         default:
 929                 BUG();
 930         }
 931
 932         return H_SUCCESS;
 933 }
 934 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
 935
 936 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
 937 {
 938         unsigned long size = kvmppc_get_gpr(vcpu, 4);
 939         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 940         unsigned long val = kvmppc_get_gpr(vcpu, 6);
 941         u64 buf;
 942         int srcu_idx;
 943         int ret;
 944
 945         switch (size) {
 946         case 1:
 947                 *(u8 *)&buf = val;
 948                 break;
 949
 950         case 2:
 951                 *(__be16 *)&buf = cpu_to_be16(val);
 952                 break;
 953
 954         case 4:
 955                 *(__be32 *)&buf = cpu_to_be32(val);
 956                 break;
 957
 958         case 8:
 959                 *(__be64 *)&buf = cpu_to_be64(val);
 960                 break;
 961
 962         default:
 963                 return H_TOO_HARD;
 964         }
 965
 966         srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 967         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 968         srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
 969         if (ret != 0)
 970                 return H_TOO_HARD;
 971
 972         return H_SUCCESS;
 973 }
 974 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
 975
 976 int kvmppc_core_check_processor_compat(void)
 977 {
 978         /*
 979          * We always return 0 for book3s. We check
 980          * for compatibility while loading the HV
 981          * or PR module
 982          */
 983         return 0;
 984 }
 985
 986 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
 987 {
 988         return kvm->arch.kvm_ops->hcall_implemented(hcall);
 989 }
 990
 991 #ifdef CONFIG_KVM_XICS
 992 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
 993                 bool line_status)
 994 {
 995         if (xics_on_xive())
 996                 return kvmppc_xive_set_irq(kvm, irq_source_id, irq, level,
 997                                            line_status);
 998         else
 999                 return kvmppc_xics_set_irq(kvm, irq_source_id, irq, level,
1000                                            line_status);
1001 }
1002
1003 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *irq_entry,
1004                               struct kvm *kvm, int irq_source_id,
1005                               int level, bool line_status)
1006 {
1007         return kvm_set_irq(kvm, irq_source_id, irq_entry->gsi,
1008                            level, line_status);
1009 }
1010 static int kvmppc_book3s_set_irq(struct kvm_kernel_irq_routing_entry *e,
1011                                  struct kvm *kvm, int irq_source_id, int level,
1012                                  bool line_status)
1013 {
1014         return kvm_set_irq(kvm, irq_source_id, e->gsi, level, line_status);
1015 }
1016
1017 int kvm_irq_map_gsi(struct kvm *kvm,
1018                     struct kvm_kernel_irq_routing_entry *entries, int gsi)
1019 {
1020         entries->gsi = gsi;
1021         entries->type = KVM_IRQ_ROUTING_IRQCHIP;
1022         entries->set = kvmppc_book3s_set_irq;
1023         entries->irqchip.irqchip = 0;
1024         entries->irqchip.pin = gsi;
1025         return 1;
1026 }
1027
1028 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin)
1029 {
1030         return pin;
1031 }
1032
1033 #endif /* CONFIG_KVM_XICS */
1034
1035 static int kvmppc_book3s_init(void)
1036 {
1037         int r;
1038
1039         r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
1040         if (r)
1041                 return r;
1042 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1043         r = kvmppc_book3s_init_pr();
1044 #endif
1045
1046 #ifdef CONFIG_KVM_XICS
1047 #ifdef CONFIG_KVM_XIVE
1048         if (xics_on_xive()) {
1049                 kvmppc_xive_init_module();
1050                 kvm_register_device_ops(&kvm_xive_ops, KVM_DEV_TYPE_XICS);
1051                 if (kvmppc_xive_native_supported()) {
1052                         kvmppc_xive_native_init_module();
1053                         kvm_register_device_ops(&kvm_xive_native_ops,
1054                                                 KVM_DEV_TYPE_XIVE);
1055                 }
1056         } else
1057 #endif
1058                 kvm_register_device_ops(&kvm_xics_ops, KVM_DEV_TYPE_XICS);
1059 #endif
1060         return r;
1061 }
1062
1063 static void kvmppc_book3s_exit(void)
1064 {
1065 #ifdef CONFIG_KVM_XICS
1066         if (xics_on_xive()) {
1067                 kvmppc_xive_exit_module();
1068                 kvmppc_xive_native_exit_module();
1069         }
1070 #endif
1071 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1072         kvmppc_book3s_exit_pr();
1073 #endif
1074         kvm_exit();
1075 }
1076
1077 module_init(kvmppc_book3s_init);
1078 module_exit(kvmppc_book3s_exit);
1079
1080 /* On 32bit this is our one and only kernel module */
1081 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1082 MODULE_ALIAS_MISCDEV(KVM_MINOR);
1083 MODULE_ALIAS("devname:kvm");
1084 #endif