linux/arch/powerpc/kvm/book3s.c
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   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 <agraf@suse.de>
   7 *    Kevin Wolf <mail@kevin-wolf.de>
   8 *
   9 * Description:
  10 * This file is derived from arch/powerpc/kvm/44x.c,
  11 * by Hollis Blanchard <hollisb@us.ibm.com>.
  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
  41const struct _kvm_stats_desc kvm_vm_stats_desc[] = {
  42        KVM_GENERIC_VM_STATS(),
  43        STATS_DESC_ICOUNTER(VM, num_2M_pages),
  44        STATS_DESC_ICOUNTER(VM, num_1G_pages)
  45};
  46static_assert(ARRAY_SIZE(kvm_vm_stats_desc) ==
  47                sizeof(struct kvm_vm_stat) / sizeof(u64));
  48
  49const struct kvm_stats_header kvm_vm_stats_header = {
  50        .name_size = KVM_STATS_NAME_SIZE,
  51        .num_desc = ARRAY_SIZE(kvm_vm_stats_desc),
  52        .id_offset = sizeof(struct kvm_stats_header),
  53        .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
  54        .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
  55                       sizeof(kvm_vm_stats_desc),
  56};
  57
  58const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = {
  59        KVM_GENERIC_VCPU_STATS(),
  60        STATS_DESC_COUNTER(VCPU, sum_exits),
  61        STATS_DESC_COUNTER(VCPU, mmio_exits),
  62        STATS_DESC_COUNTER(VCPU, signal_exits),
  63        STATS_DESC_COUNTER(VCPU, light_exits),
  64        STATS_DESC_COUNTER(VCPU, itlb_real_miss_exits),
  65        STATS_DESC_COUNTER(VCPU, itlb_virt_miss_exits),
  66        STATS_DESC_COUNTER(VCPU, dtlb_real_miss_exits),
  67        STATS_DESC_COUNTER(VCPU, dtlb_virt_miss_exits),
  68        STATS_DESC_COUNTER(VCPU, syscall_exits),
  69        STATS_DESC_COUNTER(VCPU, isi_exits),
  70        STATS_DESC_COUNTER(VCPU, dsi_exits),
  71        STATS_DESC_COUNTER(VCPU, emulated_inst_exits),
  72        STATS_DESC_COUNTER(VCPU, dec_exits),
  73        STATS_DESC_COUNTER(VCPU, ext_intr_exits),
  74        STATS_DESC_TIME_NSEC(VCPU, halt_wait_ns),
  75        STATS_DESC_COUNTER(VCPU, halt_successful_wait),
  76        STATS_DESC_COUNTER(VCPU, dbell_exits),
  77        STATS_DESC_COUNTER(VCPU, gdbell_exits),
  78        STATS_DESC_COUNTER(VCPU, ld),
  79        STATS_DESC_COUNTER(VCPU, st),
  80        STATS_DESC_COUNTER(VCPU, pf_storage),
  81        STATS_DESC_COUNTER(VCPU, pf_instruc),
  82        STATS_DESC_COUNTER(VCPU, sp_storage),
  83        STATS_DESC_COUNTER(VCPU, sp_instruc),
  84        STATS_DESC_COUNTER(VCPU, queue_intr),
  85        STATS_DESC_COUNTER(VCPU, ld_slow),
  86        STATS_DESC_COUNTER(VCPU, st_slow),
  87        STATS_DESC_COUNTER(VCPU, pthru_all),
  88        STATS_DESC_COUNTER(VCPU, pthru_host),
  89        STATS_DESC_COUNTER(VCPU, pthru_bad_aff)
  90};
  91static_assert(ARRAY_SIZE(kvm_vcpu_stats_desc) ==
  92                sizeof(struct kvm_vcpu_stat) / sizeof(u64));
  93
  94const struct kvm_stats_header kvm_vcpu_stats_header = {
  95        .name_size = KVM_STATS_NAME_SIZE,
  96        .num_desc = ARRAY_SIZE(kvm_vcpu_stats_desc),
  97        .id_offset = sizeof(struct kvm_stats_header),
  98        .desc_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE,
  99        .data_offset = sizeof(struct kvm_stats_header) + KVM_STATS_NAME_SIZE +
 100                       sizeof(kvm_vcpu_stats_desc),
 101};
 102
 103static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
 104                        unsigned long pending_now, unsigned long old_pending)
 105{
 106        if (is_kvmppc_hv_enabled(vcpu->kvm))
 107                return;
 108        if (pending_now)
 109                kvmppc_set_int_pending(vcpu, 1);
 110        else if (old_pending)
 111                kvmppc_set_int_pending(vcpu, 0);
 112}
 113
 114static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
 115{
 116        ulong crit_raw;
 117        ulong crit_r1;
 118        bool crit;
 119
 120        if (is_kvmppc_hv_enabled(vcpu->kvm))
 121                return false;
 122
 123        crit_raw = kvmppc_get_critical(vcpu);
 124        crit_r1 = kvmppc_get_gpr(vcpu, 1);
 125
 126        /* Truncate crit indicators in 32 bit mode */
 127        if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 128                crit_raw &= 0xffffffff;
 129                crit_r1 &= 0xffffffff;
 130        }
 131
 132        /* Critical section when crit == r1 */
 133        crit = (crit_raw == crit_r1);
 134        /* ... and we're in supervisor mode */
 135        crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
 136
 137        return crit;
 138}
 139
 140void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
 141{
 142        vcpu->kvm->arch.kvm_ops->inject_interrupt(vcpu, vec, flags);
 143}
 144
 145static int kvmppc_book3s_vec2irqprio(unsigned int vec)
 146{
 147        unsigned int prio;
 148
 149        switch (vec) {
 150        case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;         break;
 151        case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;        break;
 152        case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;         break;
 153        case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;         break;
 154        case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;         break;
 155        case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;         break;
 156        case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;             break;
 157        case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;            break;
 158        case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;              break;
 159        case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;           break;
 160        case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;          break;
 161        case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;              break;
 162        case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;                break;
 163        case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;              break;
 164        case 0xf40: prio = BOOK3S_IRQPRIO_VSX;                  break;
 165        case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL;          break;
 166        default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
 167        }
 168
 169        return prio;
 170}
 171
 172void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 173                                          unsigned int vec)
 174{
 175        unsigned long old_pending = vcpu->arch.pending_exceptions;
 176
 177        clear_bit(kvmppc_book3s_vec2irqprio(vec),
 178                  &vcpu->arch.pending_exceptions);
 179
 180        kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
 181                                  old_pending);
 182}
 183
 184void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
 185{
 186        vcpu->stat.queue_intr++;
 187
 188        set_bit(kvmppc_book3s_vec2irqprio(vec),
 189                &vcpu->arch.pending_exceptions);
 190#ifdef EXIT_DEBUG
 191        printk(KERN_INFO "Queueing interrupt %x\n", vec);
 192#endif
 193}
 194EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
 195
 196void kvmppc_core_queue_machine_check(struct kvm_vcpu *vcpu, ulong flags)
 197{
 198        /* might as well deliver this straight away */
 199        kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_MACHINE_CHECK, flags);
 200}
 201EXPORT_SYMBOL_GPL(kvmppc_core_queue_machine_check);
 202
 203void kvmppc_core_queue_syscall(struct kvm_vcpu *vcpu)
 204{
 205        kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_SYSCALL, 0);
 206}
 207EXPORT_SYMBOL(kvmppc_core_queue_syscall);
 208
 209void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
 210{
 211        /* might as well deliver this straight away */
 212        kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
 213}
 214EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
 215
 216void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu)
 217{
 218        /* might as well deliver this straight away */
 219        kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, 0);
 220}
 221
 222void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu)
 223{
 224        /* might as well deliver this straight away */
 225        kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_ALTIVEC, 0);
 226}
 227
 228void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu)
 229{
 230        /* might as well deliver this straight away */
 231        kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_VSX, 0);
 232}
 233
 234void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 235{
 236        kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 237}
 238EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
 239
 240int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 241{
 242        return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 243}
 244EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
 245
 246void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 247{
 248        kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 249}
 250EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
 251
 252void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 253                                struct kvm_interrupt *irq)
 254{
 255        /*
 256         * This case (KVM_INTERRUPT_SET) should never actually arise for
 257         * a pseries guest (because pseries guests expect their interrupt
 258         * controllers to continue asserting an external interrupt request
 259         * until it is acknowledged at the interrupt controller), but is
 260         * included to avoid ABI breakage and potentially for other
 261         * sorts of guest.
 262         *
 263         * There is a subtlety here: HV KVM does not test the
 264         * external_oneshot flag in the code that synthesizes
 265         * external interrupts for the guest just before entering
 266         * the guest.  That is OK even if userspace did do a
 267         * KVM_INTERRUPT_SET on a pseries guest vcpu, because the
 268         * caller (kvm_vcpu_ioctl_interrupt) does a kvm_vcpu_kick()
 269         * which ends up doing a smp_send_reschedule(), which will
 270         * pull the guest all the way out to the host, meaning that
 271         * we will call kvmppc_core_prepare_to_enter() before entering
 272         * the guest again, and that will handle the external_oneshot
 273         * flag correctly.
 274         */
 275        if (irq->irq == KVM_INTERRUPT_SET)
 276                vcpu->arch.external_oneshot = 1;
 277
 278        kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 279}
 280
 281void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 282{
 283        kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 284}
 285
 286void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
 287                                    ulong flags)
 288{
 289        kvmppc_set_dar(vcpu, dar);
 290        kvmppc_set_dsisr(vcpu, flags);
 291        kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0);
 292}
 293EXPORT_SYMBOL_GPL(kvmppc_core_queue_data_storage);
 294
 295void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
 296{
 297        kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE, flags);
 298}
 299EXPORT_SYMBOL_GPL(kvmppc_core_queue_inst_storage);
 300
 301static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
 302                                         unsigned int priority)
 303{
 304        int deliver = 1;
 305        int vec = 0;
 306        bool crit = kvmppc_critical_section(vcpu);
 307
 308        switch (priority) {
 309        case BOOK3S_IRQPRIO_DECREMENTER:
 310                deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 311                vec = BOOK3S_INTERRUPT_DECREMENTER;
 312                break;
 313        case BOOK3S_IRQPRIO_EXTERNAL:
 314                deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 315                vec = BOOK3S_INTERRUPT_EXTERNAL;
 316                break;
 317        case BOOK3S_IRQPRIO_SYSTEM_RESET:
 318                vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
 319                break;
 320        case BOOK3S_IRQPRIO_MACHINE_CHECK:
 321                vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
 322                break;
 323        case BOOK3S_IRQPRIO_DATA_STORAGE:
 324                vec = BOOK3S_INTERRUPT_DATA_STORAGE;
 325                break;
 326        case BOOK3S_IRQPRIO_INST_STORAGE:
 327                vec = BOOK3S_INTERRUPT_INST_STORAGE;
 328                break;
 329        case BOOK3S_IRQPRIO_DATA_SEGMENT:
 330                vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
 331                break;
 332        case BOOK3S_IRQPRIO_INST_SEGMENT:
 333                vec = BOOK3S_INTERRUPT_INST_SEGMENT;
 334                break;
 335        case BOOK3S_IRQPRIO_ALIGNMENT:
 336                vec = BOOK3S_INTERRUPT_ALIGNMENT;
 337                break;
 338        case BOOK3S_IRQPRIO_PROGRAM:
 339                vec = BOOK3S_INTERRUPT_PROGRAM;
 340                break;
 341        case BOOK3S_IRQPRIO_VSX:
 342                vec = BOOK3S_INTERRUPT_VSX;
 343                break;
 344        case BOOK3S_IRQPRIO_ALTIVEC:
 345                vec = BOOK3S_INTERRUPT_ALTIVEC;
 346                break;
 347        case BOOK3S_IRQPRIO_FP_UNAVAIL:
 348                vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
 349                break;
 350        case BOOK3S_IRQPRIO_SYSCALL:
 351                vec = BOOK3S_INTERRUPT_SYSCALL;
 352                break;
 353        case BOOK3S_IRQPRIO_DEBUG:
 354                vec = BOOK3S_INTERRUPT_TRACE;
 355                break;
 356        case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
 357                vec = BOOK3S_INTERRUPT_PERFMON;
 358                break;
 359        case BOOK3S_IRQPRIO_FAC_UNAVAIL:
 360                vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
 361                break;
 362        default:
 363                deliver = 0;
 364                printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
 365                break;
 366        }
 367
 368#if 0
 369        printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
 370#endif
 371
 372        if (deliver)
 373                kvmppc_inject_interrupt(vcpu, vec, 0);
 374
 375        return deliver;
 376}
 377
 378/*
 379 * This function determines if an irqprio should be cleared once issued.
 380 */
 381static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
 382{
 383        switch (priority) {
 384                case BOOK3S_IRQPRIO_DECREMENTER:
 385                        /* DEC interrupts get cleared by mtdec */
 386                        return false;
 387                case BOOK3S_IRQPRIO_EXTERNAL:
 388                        /*
 389                         * External interrupts get cleared by userspace
 390                         * except when set by the KVM_INTERRUPT ioctl with
 391                         * KVM_INTERRUPT_SET (not KVM_INTERRUPT_SET_LEVEL).
 392                         */
 393                        if (vcpu->arch.external_oneshot) {
 394                                vcpu->arch.external_oneshot = 0;
 395                                return true;
 396                        }
 397                        return false;
 398        }
 399
 400        return true;
 401}
 402
 403int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 404{
 405        unsigned long *pending = &vcpu->arch.pending_exceptions;
 406        unsigned long old_pending = vcpu->arch.pending_exceptions;
 407        unsigned int priority;
 408
 409#ifdef EXIT_DEBUG
 410        if (vcpu->arch.pending_exceptions)
 411                printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
 412#endif
 413        priority = __ffs(*pending);
 414        while (priority < BOOK3S_IRQPRIO_MAX) {
 415                if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
 416                    clear_irqprio(vcpu, priority)) {
 417                        clear_bit(priority, &vcpu->arch.pending_exceptions);
 418                        break;
 419                }
 420
 421                priority = find_next_bit(pending,
 422                                         BITS_PER_BYTE * sizeof(*pending),
 423                                         priority + 1);
 424        }
 425
 426        /* Tell the guest about our interrupt status */
 427        kvmppc_update_int_pending(vcpu, *pending, old_pending);
 428
 429        return 0;
 430}
 431EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
 432
 433kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
 434                        bool *writable)
 435{
 436        ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
 437        gfn_t gfn = gpa >> PAGE_SHIFT;
 438
 439        if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 440                mp_pa = (uint32_t)mp_pa;
 441
 442        /* Magic page override */
 443        gpa &= ~0xFFFULL;
 444        if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
 445                ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
 446                kvm_pfn_t pfn;
 447
 448                pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
 449                get_page(pfn_to_page(pfn));
 450                if (writable)
 451                        *writable = true;
 452                return pfn;
 453        }
 454
 455        return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
 456}
 457EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
 458
 459int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
 460                 enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
 461{
 462        bool data = (xlid == XLATE_DATA);
 463        bool iswrite = (xlrw == XLATE_WRITE);
 464        int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
 465        int r;
 466
 467        if (relocated) {
 468                r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
 469        } else {
 470                pte->eaddr = eaddr;
 471                pte->raddr = eaddr & KVM_PAM;
 472                pte->vpage = VSID_REAL | eaddr >> 12;
 473                pte->may_read = true;
 474                pte->may_write = true;
 475                pte->may_execute = true;
 476                r = 0;
 477
 478                if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
 479                    !data) {
 480                        if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
 481                            ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
 482                        pte->raddr &= ~SPLIT_HACK_MASK;
 483                }
 484        }
 485
 486        return r;
 487}
 488
 489int kvmppc_load_last_inst(struct kvm_vcpu *vcpu,
 490                enum instruction_fetch_type type, u32 *inst)
 491{
 492        ulong pc = kvmppc_get_pc(vcpu);
 493        int r;
 494
 495        if (type == INST_SC)
 496                pc -= 4;
 497
 498        r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
 499        if (r == EMULATE_DONE)
 500                return r;
 501        else
 502                return EMULATE_AGAIN;
 503}
 504EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
 505
 506int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
 507{
 508        return 0;
 509}
 510
 511void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
 512{
 513}
 514
 515int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 516                                  struct kvm_sregs *sregs)
 517{
 518        int ret;
 519
 520        vcpu_load(vcpu);
 521        ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
 522        vcpu_put(vcpu);
 523
 524        return ret;
 525}
 526
 527int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 528                                  struct kvm_sregs *sregs)
 529{
 530        int ret;
 531
 532        vcpu_load(vcpu);
 533        ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
 534        vcpu_put(vcpu);
 535
 536        return ret;
 537}
 538
 539int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 540{
 541        int i;
 542
 543        regs->pc = kvmppc_get_pc(vcpu);
 544        regs->cr = kvmppc_get_cr(vcpu);
 545        regs->ctr = kvmppc_get_ctr(vcpu);
 546        regs->lr = kvmppc_get_lr(vcpu);
 547        regs->xer = kvmppc_get_xer(vcpu);
 548        regs->msr = kvmppc_get_msr(vcpu);
 549        regs->srr0 = kvmppc_get_srr0(vcpu);
 550        regs->srr1 = kvmppc_get_srr1(vcpu);
 551        regs->pid = vcpu->arch.pid;
 552        regs->sprg0 = kvmppc_get_sprg0(vcpu);
 553        regs->sprg1 = kvmppc_get_sprg1(vcpu);
 554        regs->sprg2 = kvmppc_get_sprg2(vcpu);
 555        regs->sprg3 = kvmppc_get_sprg3(vcpu);
 556        regs->sprg4 = kvmppc_get_sprg4(vcpu);
 557        regs->sprg5 = kvmppc_get_sprg5(vcpu);
 558        regs->sprg6 = kvmppc_get_sprg6(vcpu);
 559        regs->sprg7 = kvmppc_get_sprg7(vcpu);
 560
 561        for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 562                regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 563
 564        return 0;
 565}
 566
 567int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 568{
 569        int i;
 570
 571        kvmppc_set_pc(vcpu, regs->pc);
 572        kvmppc_set_cr(vcpu, regs->cr);
 573        kvmppc_set_ctr(vcpu, regs->ctr);
 574        kvmppc_set_lr(vcpu, regs->lr);
 575        kvmppc_set_xer(vcpu, regs->xer);
 576        kvmppc_set_msr(vcpu, regs->msr);
 577        kvmppc_set_srr0(vcpu, regs->srr0);
 578        kvmppc_set_srr1(vcpu, regs->srr1);
 579        kvmppc_set_sprg0(vcpu, regs->sprg0);
 580        kvmppc_set_sprg1(vcpu, regs->sprg1);
 581        kvmppc_set_sprg2(vcpu, regs->sprg2);
 582        kvmppc_set_sprg3(vcpu, regs->sprg3);
 583        kvmppc_set_sprg4(vcpu, regs->sprg4);
 584        kvmppc_set_sprg5(vcpu, regs->sprg5);
 585        kvmppc_set_sprg6(vcpu, regs->sprg6);
 586        kvmppc_set_sprg7(vcpu, regs->sprg7);
 587
 588        for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 589                kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 590
 591        return 0;
 592}
 593
 594int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 595{
 596        return -EOPNOTSUPP;
 597}
 598
 599int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 600{
 601        return -EOPNOTSUPP;
 602}
 603
 604int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
 605                        union kvmppc_one_reg *val)
 606{
 607        int r = 0;
 608        long int i;
 609
 610        r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
 611        if (r == -EINVAL) {
 612                r = 0;
 613                switch (id) {
 614                case KVM_REG_PPC_DAR:
 615                        *val = get_reg_val(id, kvmppc_get_dar(vcpu));
 616                        break;
 617                case KVM_REG_PPC_DSISR:
 618                        *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
 619                        break;
 620                case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 621                        i = id - KVM_REG_PPC_FPR0;
 622                        *val = get_reg_val(id, VCPU_FPR(vcpu, i));
 623                        break;
 624                case KVM_REG_PPC_FPSCR:
 625                        *val = get_reg_val(id, vcpu->arch.fp.fpscr);
 626                        break;
 627#ifdef CONFIG_VSX
 628                case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 629                        if (cpu_has_feature(CPU_FTR_VSX)) {
 630                                i = id - KVM_REG_PPC_VSR0;
 631                                val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
 632                                val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
 633                        } else {
 634                                r = -ENXIO;
 635                        }
 636                        break;
 637#endif /* CONFIG_VSX */
 638                case KVM_REG_PPC_DEBUG_INST:
 639                        *val = get_reg_val(id, INS_TW);
 640                        break;
 641#ifdef CONFIG_KVM_XICS
 642                case KVM_REG_PPC_ICP_STATE:
 643                        if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
 644                                r = -ENXIO;
 645                                break;
 646                        }
 647                        if (xics_on_xive())
 648                                *val = get_reg_val(id, kvmppc_xive_get_icp(vcpu));
 649                        else
 650                                *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
 651                        break;
 652#endif /* CONFIG_KVM_XICS */
 653#ifdef CONFIG_KVM_XIVE
 654                case KVM_REG_PPC_VP_STATE:
 655                        if (!vcpu->arch.xive_vcpu) {
 656                                r = -ENXIO;
 657                                break;
 658                        }
 659                        if (xive_enabled())
 660                                r = kvmppc_xive_native_get_vp(vcpu, val);
 661                        else
 662                                r = -ENXIO;
 663                        break;
 664#endif /* CONFIG_KVM_XIVE */
 665                case KVM_REG_PPC_FSCR:
 666                        *val = get_reg_val(id, vcpu->arch.fscr);
 667                        break;
 668                case KVM_REG_PPC_TAR:
 669                        *val = get_reg_val(id, vcpu->arch.tar);
 670                        break;
 671                case KVM_REG_PPC_EBBHR:
 672                        *val = get_reg_val(id, vcpu->arch.ebbhr);
 673                        break;
 674                case KVM_REG_PPC_EBBRR:
 675                        *val = get_reg_val(id, vcpu->arch.ebbrr);
 676                        break;
 677                case KVM_REG_PPC_BESCR:
 678                        *val = get_reg_val(id, vcpu->arch.bescr);
 679                        break;
 680                case KVM_REG_PPC_IC:
 681                        *val = get_reg_val(id, vcpu->arch.ic);
 682                        break;
 683                default:
 684                        r = -EINVAL;
 685                        break;
 686                }
 687        }
 688
 689        return r;
 690}
 691
 692int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
 693                        union kvmppc_one_reg *val)
 694{
 695        int r = 0;
 696        long int i;
 697
 698        r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
 699        if (r == -EINVAL) {
 700                r = 0;
 701                switch (id) {
 702                case KVM_REG_PPC_DAR:
 703                        kvmppc_set_dar(vcpu, set_reg_val(id, *val));
 704                        break;
 705                case KVM_REG_PPC_DSISR:
 706                        kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
 707                        break;
 708                case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 709                        i = id - KVM_REG_PPC_FPR0;
 710                        VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
 711                        break;
 712                case KVM_REG_PPC_FPSCR:
 713                        vcpu->arch.fp.fpscr = set_reg_val(id, *val);
 714                        break;
 715#ifdef CONFIG_VSX
 716                case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 717                        if (cpu_has_feature(CPU_FTR_VSX)) {
 718                                i = id - KVM_REG_PPC_VSR0;
 719                                vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
 720                                vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
 721                        } else {
 722                                r = -ENXIO;
 723                        }
 724                        break;
 725#endif /* CONFIG_VSX */
 726#ifdef CONFIG_KVM_XICS
 727                case KVM_REG_PPC_ICP_STATE:
 728                        if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
 729                                r = -ENXIO;
 730                                break;
 731                        }
 732                        if (xics_on_xive())
 733                                r = kvmppc_xive_set_icp(vcpu, set_reg_val(id, *val));
 734                        else
 735                                r = kvmppc_xics_set_icp(vcpu, set_reg_val(id, *val));
 736                        break;
 737#endif /* CONFIG_KVM_XICS */
 738#ifdef CONFIG_KVM_XIVE
 739                case KVM_REG_PPC_VP_STATE:
 740                        if (!vcpu->arch.xive_vcpu) {
 741                                r = -ENXIO;
 742                                break;
 743                        }
 744                        if (xive_enabled())
 745                                r = kvmppc_xive_native_set_vp(vcpu, val);
 746                        else
 747                                r = -ENXIO;
 748                        break;
 749#endif /* CONFIG_KVM_XIVE */
 750                case KVM_REG_PPC_FSCR:
 751                        vcpu->arch.fscr = set_reg_val(id, *val);
 752                        break;
 753                case KVM_REG_PPC_TAR:
 754                        vcpu->arch.tar = set_reg_val(id, *val);
 755                        break;
 756                case KVM_REG_PPC_EBBHR:
 757                        vcpu->arch.ebbhr = set_reg_val(id, *val);
 758                        break;
 759                case KVM_REG_PPC_EBBRR:
 760                        vcpu->arch.ebbrr = set_reg_val(id, *val);
 761                        break;
 762                case KVM_REG_PPC_BESCR:
 763                        vcpu->arch.bescr = set_reg_val(id, *val);
 764                        break;
 765                case KVM_REG_PPC_IC:
 766                        vcpu->arch.ic = set_reg_val(id, *val);
 767                        break;
 768                default:
 769                        r = -EINVAL;
 770                        break;
 771                }
 772        }
 773
 774        return r;
 775}
 776
 777void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 778{
 779        vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
 780}
 781
 782void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
 783{
 784        vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
 785}
 786
 787void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 788{
 789        vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
 790}
 791EXPORT_SYMBOL_GPL(kvmppc_set_msr);
 792
 793int kvmppc_vcpu_run(struct kvm_vcpu *vcpu)
 794{
 795        return vcpu->kvm->arch.kvm_ops->vcpu_run(vcpu);
 796}
 797
 798int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 799                                  struct kvm_translation *tr)
 800{
 801        return 0;
 802}
 803
 804int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 805                                        struct kvm_guest_debug *dbg)
 806{
 807        vcpu_load(vcpu);
 808        vcpu->guest_debug = dbg->control;
 809        vcpu_put(vcpu);
 810        return 0;
 811}
 812
 813void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
 814{
 815        kvmppc_core_queue_dec(vcpu);
 816        kvm_vcpu_kick(vcpu);
 817}
 818
 819int kvmppc_core_vcpu_create(struct kvm_vcpu *vcpu)
 820{
 821        return vcpu->kvm->arch.kvm_ops->vcpu_create(vcpu);
 822}
 823
 824void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 825{
 826        vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
 827}
 828
 829int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 830{
 831        return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
 832}
 833
 834void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
 835{
 836
 837}
 838
 839int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 840{
 841        return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
 842}
 843
 844void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
 845{
 846        kvm->arch.kvm_ops->free_memslot(slot);
 847}
 848
 849void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
 850{
 851        kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
 852}
 853
 854int kvmppc_core_prepare_memory_region(struct kvm *kvm,
 855                                struct kvm_memory_slot *memslot,
 856                                const struct kvm_userspace_memory_region *mem,
 857                                enum kvm_mr_change change)
 858{
 859        return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem,
 860                                                        change);
 861}
 862
 863void kvmppc_core_commit_memory_region(struct kvm *kvm,
 864                                const struct kvm_userspace_memory_region *mem,
 865                                const struct kvm_memory_slot *old,
 866                                const struct kvm_memory_slot *new,
 867                                enum kvm_mr_change change)
 868{
 869        kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new, change);
 870}
 871
 872bool kvm_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range)
 873{
 874        return kvm->arch.kvm_ops->unmap_gfn_range(kvm, range);
 875}
 876
 877bool kvm_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
 878{
 879        return kvm->arch.kvm_ops->age_gfn(kvm, range);
 880}
 881
 882bool kvm_test_age_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
 883{
 884        return kvm->arch.kvm_ops->test_age_gfn(kvm, range);
 885}
 886
 887bool kvm_set_spte_gfn(struct kvm *kvm, struct kvm_gfn_range *range)
 888{
 889        return kvm->arch.kvm_ops->set_spte_gfn(kvm, range);
 890}
 891
 892int kvmppc_core_init_vm(struct kvm *kvm)
 893{
 894
 895#ifdef CONFIG_PPC64
 896        INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
 897        INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
 898        mutex_init(&kvm->arch.rtas_token_lock);
 899#endif
 900
 901        return kvm->arch.kvm_ops->init_vm(kvm);
 902}
 903
 904void kvmppc_core_destroy_vm(struct kvm *kvm)
 905{
 906        kvm->arch.kvm_ops->destroy_vm(kvm);
 907
 908#ifdef CONFIG_PPC64
 909        kvmppc_rtas_tokens_free(kvm);
 910        WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
 911#endif
 912
 913#ifdef CONFIG_KVM_XICS
 914        /*
 915         * Free the XIVE and XICS devices which are not directly freed by the
 916         * device 'release' method
 917         */
 918        kfree(kvm->arch.xive_devices.native);
 919        kvm->arch.xive_devices.native = NULL;
 920        kfree(kvm->arch.xive_devices.xics_on_xive);
 921        kvm->arch.xive_devices.xics_on_xive = NULL;
 922        kfree(kvm->arch.xics_device);
 923        kvm->arch.xics_device = NULL;
 924#endif /* CONFIG_KVM_XICS */
 925}
 926
 927int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
 928{
 929        unsigned long size = kvmppc_get_gpr(vcpu, 4);
 930        unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 931        u64 buf;
 932        int srcu_idx;
 933        int ret;
 934
 935        if (!is_power_of_2(size) || (size > sizeof(buf)))
 936                return H_TOO_HARD;
 937
 938        srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 939        ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 940        srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
 941        if (ret != 0)
 942                return H_TOO_HARD;
 943
 944        switch (size) {
 945        case 1:
 946                kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
 947                break;
 948
 949        case 2:
 950                kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
 951                break;
 952
 953        case 4:
 954                kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
 955                break;
 956
 957        case 8:
 958                kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
 959                break;
 960
 961        default:
 962                BUG();
 963        }
 964
 965        return H_SUCCESS;
 966}
 967EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
 968
 969int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
 970{
 971        unsigned long size = kvmppc_get_gpr(vcpu, 4);
 972        unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 973        unsigned long val = kvmppc_get_gpr(vcpu, 6);
 974        u64 buf;
 975        int srcu_idx;
 976        int ret;
 977
 978        switch (size) {
 979        case 1:
 980                *(u8 *)&buf = val;
 981                break;
 982
 983        case 2:
 984                *(__be16 *)&buf = cpu_to_be16(val);
 985                break;
 986
 987        case 4:
 988                *(__be32 *)&buf = cpu_to_be32(val);
 989                break;
 990
 991        case 8:
 992                *(__be64 *)&buf = cpu_to_be64(val);
 993                break;
 994
 995        default:
 996                return H_TOO_HARD;
 997        }
 998
 999        srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
1000        ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
1001        srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
1002        if (ret != 0)
1003                return H_TOO_HARD;
1004
1005        return H_SUCCESS;
1006}
1007EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
1008
1009int kvmppc_core_check_processor_compat(void)
1010{
1011        /*
1012         * We always return 0 for book3s. We check
1013         * for compatibility while loading the HV
1014         * or PR module
1015         */
1016        return 0;
1017}
1018
1019int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
1020{
1021        return kvm->arch.kvm_ops->hcall_implemented(hcall);
1022}
1023
1024#ifdef CONFIG_KVM_XICS
1025int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
1026                bool line_status)
1027{
1028        if (xics_on_xive())
1029                return kvmppc_xive_set_irq(kvm, irq_source_id, irq, level,
1030                                           line_status);
1031        else
1032                return kvmppc_xics_set_irq(kvm, irq_source_id, irq, level,
1033                                           line_status);
1034}
1035
1036int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *irq_entry,
1037                              struct kvm *kvm, int irq_source_id,
1038                              int level, bool line_status)
1039{
1040        return kvm_set_irq(kvm, irq_source_id, irq_entry->gsi,
1041                           level, line_status);
1042}
1043static int kvmppc_book3s_set_irq(struct kvm_kernel_irq_routing_entry *e,
1044                                 struct kvm *kvm, int irq_source_id, int level,
1045                                 bool line_status)
1046{
1047        return kvm_set_irq(kvm, irq_source_id, e->gsi, level, line_status);
1048}
1049
1050int kvm_irq_map_gsi(struct kvm *kvm,
1051                    struct kvm_kernel_irq_routing_entry *entries, int gsi)
1052{
1053        entries->gsi = gsi;
1054        entries->type = KVM_IRQ_ROUTING_IRQCHIP;
1055        entries->set = kvmppc_book3s_set_irq;
1056        entries->irqchip.irqchip = 0;
1057        entries->irqchip.pin = gsi;
1058        return 1;
1059}
1060
1061int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin)
1062{
1063        return pin;
1064}
1065
1066#endif /* CONFIG_KVM_XICS */
1067
1068static int kvmppc_book3s_init(void)
1069{
1070        int r;
1071
1072        r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
1073        if (r)
1074                return r;
1075#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1076        r = kvmppc_book3s_init_pr();
1077#endif
1078
1079#ifdef CONFIG_KVM_XICS
1080#ifdef CONFIG_KVM_XIVE
1081        if (xics_on_xive()) {
1082                kvm_register_device_ops(&kvm_xive_ops, KVM_DEV_TYPE_XICS);
1083                if (kvmppc_xive_native_supported())
1084                        kvm_register_device_ops(&kvm_xive_native_ops,
1085                                                KVM_DEV_TYPE_XIVE);
1086        } else
1087#endif
1088                kvm_register_device_ops(&kvm_xics_ops, KVM_DEV_TYPE_XICS);
1089#endif
1090        return r;
1091}
1092
1093static void kvmppc_book3s_exit(void)
1094{
1095#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1096        kvmppc_book3s_exit_pr();
1097#endif
1098        kvm_exit();
1099}
1100
1101module_init(kvmppc_book3s_init);
1102module_exit(kvmppc_book3s_exit);
1103
1104/* On 32bit this is our one and only kernel module */
1105#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1106MODULE_ALIAS_MISCDEV(KVM_MINOR);
1107MODULE_ALIAS("devname:kvm");
1108#endif
1109
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