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 <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 VM_STAT(x, ...) offsetof(struct kvm, stat.x), KVM_STAT_VM, ## __VA_ARGS__
  40 #define VCPU_STAT(x, ...) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU, ## __VA_ARGS__
  41
  42 /* #define EXIT_DEBUG */
  43
  44 struct kvm_stats_debugfs_item debugfs_entries[] = {
  45         { "exits",       VCPU_STAT(sum_exits) },
  46         { "mmio",        VCPU_STAT(mmio_exits) },
  47         { "sig",         VCPU_STAT(signal_exits) },
  48         { "sysc",        VCPU_STAT(syscall_exits) },
  49         { "inst_emu",    VCPU_STAT(emulated_inst_exits) },
  50         { "dec",         VCPU_STAT(dec_exits) },
  51         { "ext_intr",    VCPU_STAT(ext_intr_exits) },
  52         { "queue_intr",  VCPU_STAT(queue_intr) },
  53         { "halt_poll_success_ns",       VCPU_STAT(halt_poll_success_ns) },
  54         { "halt_poll_fail_ns",          VCPU_STAT(halt_poll_fail_ns) },
  55         { "halt_wait_ns",               VCPU_STAT(halt_wait_ns) },
  56         { "halt_successful_poll", VCPU_STAT(halt_successful_poll), },
  57         { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll), },
  58         { "halt_successful_wait",       VCPU_STAT(halt_successful_wait) },
  59         { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
  60         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
  61         { "pf_storage",  VCPU_STAT(pf_storage) },
  62         { "sp_storage",  VCPU_STAT(sp_storage) },
  63         { "pf_instruc",  VCPU_STAT(pf_instruc) },
  64         { "sp_instruc",  VCPU_STAT(sp_instruc) },
  65         { "ld",          VCPU_STAT(ld) },
  66         { "ld_slow",     VCPU_STAT(ld_slow) },
  67         { "st",          VCPU_STAT(st) },
  68         { "st_slow",     VCPU_STAT(st_slow) },
  69         { "pthru_all",       VCPU_STAT(pthru_all) },
  70         { "pthru_host",      VCPU_STAT(pthru_host) },
  71         { "pthru_bad_aff",   VCPU_STAT(pthru_bad_aff) },
  72         { "largepages_2M",    VM_STAT(num_2M_pages, .mode = 0444) },
  73         { "largepages_1G",    VM_STAT(num_1G_pages, .mode = 0444) },
  74         { NULL }
  75 };
  76
  77 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
  78                         unsigned long pending_now, unsigned long old_pending)
  79 {
  80         if (is_kvmppc_hv_enabled(vcpu->kvm))
  81                 return;
  82         if (pending_now)
  83                 kvmppc_set_int_pending(vcpu, 1);
  84         else if (old_pending)
  85                 kvmppc_set_int_pending(vcpu, 0);
  86 }
  87
  88 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
  89 {
  90         ulong crit_raw;
  91         ulong crit_r1;
  92         bool crit;
  93
  94         if (is_kvmppc_hv_enabled(vcpu->kvm))
  95                 return false;
  96
  97         crit_raw = kvmppc_get_critical(vcpu);
  98         crit_r1 = kvmppc_get_gpr(vcpu, 1);
  99
 100         /* Truncate crit indicators in 32 bit mode */
 101         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
 102                 crit_raw &= 0xffffffff;
 103                 crit_r1 &= 0xffffffff;
 104         }
 105
 106         /* Critical section when crit == r1 */
 107         crit = (crit_raw == crit_r1);
 108         /* ... and we're in supervisor mode */
 109         crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
 110
 111         return crit;
 112 }
 113
 114 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
 115 {
 116         vcpu->kvm->arch.kvm_ops->inject_interrupt(vcpu, vec, flags);
 117 }
 118
 119 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
 120 {
 121         unsigned int prio;
 122
 123         switch (vec) {
 124         case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;         break;
 125         case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;        break;
 126         case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;         break;
 127         case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;         break;
 128         case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;         break;
 129         case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;         break;
 130         case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;             break;
 131         case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;            break;
 132         case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;              break;
 133         case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;           break;
 134         case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;          break;
 135         case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;              break;
 136         case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;                break;
 137         case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;              break;
 138         case 0xf40: prio = BOOK3S_IRQPRIO_VSX;                  break;
 139         case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL;          break;
 140         default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
 141         }
 142
 143         return prio;
 144 }
 145
 146 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 147                                           unsigned int vec)
 148 {
 149         unsigned long old_pending = vcpu->arch.pending_exceptions;
 150
 151         clear_bit(kvmppc_book3s_vec2irqprio(vec),
 152                   &vcpu->arch.pending_exceptions);
 153
 154         kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
 155                                   old_pending);
 156 }
 157
 158 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
 159 {
 160         vcpu->stat.queue_intr++;
 161
 162         set_bit(kvmppc_book3s_vec2irqprio(vec),
 163                 &vcpu->arch.pending_exceptions);
 164 #ifdef EXIT_DEBUG
 165         printk(KERN_INFO "Queueing interrupt %x\n", vec);
 166 #endif
 167 }
 168 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
 169
 170 void kvmppc_core_queue_machine_check(struct kvm_vcpu *vcpu, ulong flags)
 171 {
 172         /* might as well deliver this straight away */
 173         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_MACHINE_CHECK, flags);
 174 }
 175 EXPORT_SYMBOL_GPL(kvmppc_core_queue_machine_check);
 176
 177 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
 178 {
 179         /* might as well deliver this straight away */
 180         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
 181 }
 182 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
 183
 184 void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu)
 185 {
 186         /* might as well deliver this straight away */
 187         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, 0);
 188 }
 189
 190 void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu)
 191 {
 192         /* might as well deliver this straight away */
 193         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_ALTIVEC, 0);
 194 }
 195
 196 void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu)
 197 {
 198         /* might as well deliver this straight away */
 199         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_VSX, 0);
 200 }
 201
 202 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
 203 {
 204         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 205 }
 206 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
 207
 208 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
 209 {
 210         return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
 211 }
 212 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
 213
 214 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
 215 {
 216         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
 217 }
 218 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
 219
 220 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 221                                 struct kvm_interrupt *irq)
 222 {
 223         /*
 224          * This case (KVM_INTERRUPT_SET) should never actually arise for
 225          * a pseries guest (because pseries guests expect their interrupt
 226          * controllers to continue asserting an external interrupt request
 227          * until it is acknowledged at the interrupt controller), but is
 228          * included to avoid ABI breakage and potentially for other
 229          * sorts of guest.
 230          *
 231          * There is a subtlety here: HV KVM does not test the
 232          * external_oneshot flag in the code that synthesizes
 233          * external interrupts for the guest just before entering
 234          * the guest.  That is OK even if userspace did do a
 235          * KVM_INTERRUPT_SET on a pseries guest vcpu, because the
 236          * caller (kvm_vcpu_ioctl_interrupt) does a kvm_vcpu_kick()
 237          * which ends up doing a smp_send_reschedule(), which will
 238          * pull the guest all the way out to the host, meaning that
 239          * we will call kvmppc_core_prepare_to_enter() before entering
 240          * the guest again, and that will handle the external_oneshot
 241          * flag correctly.
 242          */
 243         if (irq->irq == KVM_INTERRUPT_SET)
 244                 vcpu->arch.external_oneshot = 1;
 245
 246         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 247 }
 248
 249 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
 250 {
 251         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
 252 }
 253
 254 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
 255                                     ulong flags)
 256 {
 257         kvmppc_set_dar(vcpu, dar);
 258         kvmppc_set_dsisr(vcpu, flags);
 259         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0);
 260 }
 261 EXPORT_SYMBOL_GPL(kvmppc_core_queue_data_storage);
 262
 263 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
 264 {
 265         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE, flags);
 266 }
 267 EXPORT_SYMBOL_GPL(kvmppc_core_queue_inst_storage);
 268
 269 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
 270                                          unsigned int priority)
 271 {
 272         int deliver = 1;
 273         int vec = 0;
 274         bool crit = kvmppc_critical_section(vcpu);
 275
 276         switch (priority) {
 277         case BOOK3S_IRQPRIO_DECREMENTER:
 278                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 279                 vec = BOOK3S_INTERRUPT_DECREMENTER;
 280                 break;
 281         case BOOK3S_IRQPRIO_EXTERNAL:
 282                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
 283                 vec = BOOK3S_INTERRUPT_EXTERNAL;
 284                 break;
 285         case BOOK3S_IRQPRIO_SYSTEM_RESET:
 286                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
 287                 break;
 288         case BOOK3S_IRQPRIO_MACHINE_CHECK:
 289                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
 290                 break;
 291         case BOOK3S_IRQPRIO_DATA_STORAGE:
 292                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
 293                 break;
 294         case BOOK3S_IRQPRIO_INST_STORAGE:
 295                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
 296                 break;
 297         case BOOK3S_IRQPRIO_DATA_SEGMENT:
 298                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
 299                 break;
 300         case BOOK3S_IRQPRIO_INST_SEGMENT:
 301                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
 302                 break;
 303         case BOOK3S_IRQPRIO_ALIGNMENT:
 304                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
 305                 break;
 306         case BOOK3S_IRQPRIO_PROGRAM:
 307                 vec = BOOK3S_INTERRUPT_PROGRAM;
 308                 break;
 309         case BOOK3S_IRQPRIO_VSX:
 310                 vec = BOOK3S_INTERRUPT_VSX;
 311                 break;
 312         case BOOK3S_IRQPRIO_ALTIVEC:
 313                 vec = BOOK3S_INTERRUPT_ALTIVEC;
 314                 break;
 315         case BOOK3S_IRQPRIO_FP_UNAVAIL:
 316                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
 317                 break;
 318         case BOOK3S_IRQPRIO_SYSCALL:
 319                 vec = BOOK3S_INTERRUPT_SYSCALL;
 320                 break;
 321         case BOOK3S_IRQPRIO_DEBUG:
 322                 vec = BOOK3S_INTERRUPT_TRACE;
 323                 break;
 324         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
 325                 vec = BOOK3S_INTERRUPT_PERFMON;
 326                 break;
 327         case BOOK3S_IRQPRIO_FAC_UNAVAIL:
 328                 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
 329                 break;
 330         default:
 331                 deliver = 0;
 332                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
 333                 break;
 334         }
 335
 336 #if 0
 337         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
 338 #endif
 339
 340         if (deliver)
 341                 kvmppc_inject_interrupt(vcpu, vec, 0);
 342
 343         return deliver;
 344 }
 345
 346 /*
 347  * This function determines if an irqprio should be cleared once issued.
 348  */
 349 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
 350 {
 351         switch (priority) {
 352                 case BOOK3S_IRQPRIO_DECREMENTER:
 353                         /* DEC interrupts get cleared by mtdec */
 354                         return false;
 355                 case BOOK3S_IRQPRIO_EXTERNAL:
 356                         /*
 357                          * External interrupts get cleared by userspace
 358                          * except when set by the KVM_INTERRUPT ioctl with
 359                          * KVM_INTERRUPT_SET (not KVM_INTERRUPT_SET_LEVEL).
 360                          */
 361                         if (vcpu->arch.external_oneshot) {
 362                                 vcpu->arch.external_oneshot = 0;
 363                                 return true;
 364                         }
 365                         return false;
 366         }
 367
 368         return true;
 369 }
 370
 371 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
 372 {
 373         unsigned long *pending = &vcpu->arch.pending_exceptions;
 374         unsigned long old_pending = vcpu->arch.pending_exceptions;
 375         unsigned int priority;
 376
 377 #ifdef EXIT_DEBUG
 378         if (vcpu->arch.pending_exceptions)
 379                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
 380 #endif
 381         priority = __ffs(*pending);
 382         while (priority < BOOK3S_IRQPRIO_MAX) {
 383                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
 384                     clear_irqprio(vcpu, priority)) {
 385                         clear_bit(priority, &vcpu->arch.pending_exceptions);
 386                         break;
 387                 }
 388
 389                 priority = find_next_bit(pending,
 390                                          BITS_PER_BYTE * sizeof(*pending),
 391                                          priority + 1);
 392         }
 393
 394         /* Tell the guest about our interrupt status */
 395         kvmppc_update_int_pending(vcpu, *pending, old_pending);
 396
 397         return 0;
 398 }
 399 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
 400
 401 kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
 402                         bool *writable)
 403 {
 404         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
 405         gfn_t gfn = gpa >> PAGE_SHIFT;
 406
 407         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
 408                 mp_pa = (uint32_t)mp_pa;
 409
 410         /* Magic page override */
 411         gpa &= ~0xFFFULL;
 412         if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
 413                 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
 414                 kvm_pfn_t pfn;
 415
 416                 pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
 417                 get_page(pfn_to_page(pfn));
 418                 if (writable)
 419                         *writable = true;
 420                 return pfn;
 421         }
 422
 423         return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
 424 }
 425 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
 426
 427 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
 428                  enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
 429 {
 430         bool data = (xlid == XLATE_DATA);
 431         bool iswrite = (xlrw == XLATE_WRITE);
 432         int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
 433         int r;
 434
 435         if (relocated) {
 436                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
 437         } else {
 438                 pte->eaddr = eaddr;
 439                 pte->raddr = eaddr & KVM_PAM;
 440                 pte->vpage = VSID_REAL | eaddr >> 12;
 441                 pte->may_read = true;
 442                 pte->may_write = true;
 443                 pte->may_execute = true;
 444                 r = 0;
 445
 446                 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
 447                     !data) {
 448                         if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
 449                             ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
 450                         pte->raddr &= ~SPLIT_HACK_MASK;
 451                 }
 452         }
 453
 454         return r;
 455 }
 456
 457 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu,
 458                 enum instruction_fetch_type type, u32 *inst)
 459 {
 460         ulong pc = kvmppc_get_pc(vcpu);
 461         int r;
 462
 463         if (type == INST_SC)
 464                 pc -= 4;
 465
 466         r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
 467         if (r == EMULATE_DONE)
 468                 return r;
 469         else
 470                 return EMULATE_AGAIN;
 471 }
 472 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
 473
 474 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
 475 {
 476         return 0;
 477 }
 478
 479 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
 480 {
 481 }
 482
 483 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
 484                                   struct kvm_sregs *sregs)
 485 {
 486         int ret;
 487
 488         vcpu_load(vcpu);
 489         ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
 490         vcpu_put(vcpu);
 491
 492         return ret;
 493 }
 494
 495 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
 496                                   struct kvm_sregs *sregs)
 497 {
 498         int ret;
 499
 500         vcpu_load(vcpu);
 501         ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
 502         vcpu_put(vcpu);
 503
 504         return ret;
 505 }
 506
 507 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 508 {
 509         int i;
 510
 511         regs->pc = kvmppc_get_pc(vcpu);
 512         regs->cr = kvmppc_get_cr(vcpu);
 513         regs->ctr = kvmppc_get_ctr(vcpu);
 514         regs->lr = kvmppc_get_lr(vcpu);
 515         regs->xer = kvmppc_get_xer(vcpu);
 516         regs->msr = kvmppc_get_msr(vcpu);
 517         regs->srr0 = kvmppc_get_srr0(vcpu);
 518         regs->srr1 = kvmppc_get_srr1(vcpu);
 519         regs->pid = vcpu->arch.pid;
 520         regs->sprg0 = kvmppc_get_sprg0(vcpu);
 521         regs->sprg1 = kvmppc_get_sprg1(vcpu);
 522         regs->sprg2 = kvmppc_get_sprg2(vcpu);
 523         regs->sprg3 = kvmppc_get_sprg3(vcpu);
 524         regs->sprg4 = kvmppc_get_sprg4(vcpu);
 525         regs->sprg5 = kvmppc_get_sprg5(vcpu);
 526         regs->sprg6 = kvmppc_get_sprg6(vcpu);
 527         regs->sprg7 = kvmppc_get_sprg7(vcpu);
 528
 529         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 530                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
 531
 532         return 0;
 533 }
 534
 535 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
 536 {
 537         int i;
 538
 539         kvmppc_set_pc(vcpu, regs->pc);
 540         kvmppc_set_cr(vcpu, regs->cr);
 541         kvmppc_set_ctr(vcpu, regs->ctr);
 542         kvmppc_set_lr(vcpu, regs->lr);
 543         kvmppc_set_xer(vcpu, regs->xer);
 544         kvmppc_set_msr(vcpu, regs->msr);
 545         kvmppc_set_srr0(vcpu, regs->srr0);
 546         kvmppc_set_srr1(vcpu, regs->srr1);
 547         kvmppc_set_sprg0(vcpu, regs->sprg0);
 548         kvmppc_set_sprg1(vcpu, regs->sprg1);
 549         kvmppc_set_sprg2(vcpu, regs->sprg2);
 550         kvmppc_set_sprg3(vcpu, regs->sprg3);
 551         kvmppc_set_sprg4(vcpu, regs->sprg4);
 552         kvmppc_set_sprg5(vcpu, regs->sprg5);
 553         kvmppc_set_sprg6(vcpu, regs->sprg6);
 554         kvmppc_set_sprg7(vcpu, regs->sprg7);
 555
 556         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
 557                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
 558
 559         return 0;
 560 }
 561
 562 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 563 {
 564         return -ENOTSUPP;
 565 }
 566
 567 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
 568 {
 569         return -ENOTSUPP;
 570 }
 571
 572 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
 573                         union kvmppc_one_reg *val)
 574 {
 575         int r = 0;
 576         long int i;
 577
 578         r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
 579         if (r == -EINVAL) {
 580                 r = 0;
 581                 switch (id) {
 582                 case KVM_REG_PPC_DAR:
 583                         *val = get_reg_val(id, kvmppc_get_dar(vcpu));
 584                         break;
 585                 case KVM_REG_PPC_DSISR:
 586                         *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
 587                         break;
 588                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 589                         i = id - KVM_REG_PPC_FPR0;
 590                         *val = get_reg_val(id, VCPU_FPR(vcpu, i));
 591                         break;
 592                 case KVM_REG_PPC_FPSCR:
 593                         *val = get_reg_val(id, vcpu->arch.fp.fpscr);
 594                         break;
 595 #ifdef CONFIG_VSX
 596                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 597                         if (cpu_has_feature(CPU_FTR_VSX)) {
 598                                 i = id - KVM_REG_PPC_VSR0;
 599                                 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
 600                                 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
 601                         } else {
 602                                 r = -ENXIO;
 603                         }
 604                         break;
 605 #endif /* CONFIG_VSX */
 606                 case KVM_REG_PPC_DEBUG_INST:
 607                         *val = get_reg_val(id, INS_TW);
 608                         break;
 609 #ifdef CONFIG_KVM_XICS
 610                 case KVM_REG_PPC_ICP_STATE:
 611                         if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
 612                                 r = -ENXIO;
 613                                 break;
 614                         }
 615                         if (xics_on_xive())
 616                                 *val = get_reg_val(id, kvmppc_xive_get_icp(vcpu));
 617                         else
 618                                 *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
 619                         break;
 620 #endif /* CONFIG_KVM_XICS */
 621 #ifdef CONFIG_KVM_XIVE
 622                 case KVM_REG_PPC_VP_STATE:
 623                         if (!vcpu->arch.xive_vcpu) {
 624                                 r = -ENXIO;
 625                                 break;
 626                         }
 627                         if (xive_enabled())
 628                                 r = kvmppc_xive_native_get_vp(vcpu, val);
 629                         else
 630                                 r = -ENXIO;
 631                         break;
 632 #endif /* CONFIG_KVM_XIVE */
 633                 case KVM_REG_PPC_FSCR:
 634                         *val = get_reg_val(id, vcpu->arch.fscr);
 635                         break;
 636                 case KVM_REG_PPC_TAR:
 637                         *val = get_reg_val(id, vcpu->arch.tar);
 638                         break;
 639                 case KVM_REG_PPC_EBBHR:
 640                         *val = get_reg_val(id, vcpu->arch.ebbhr);
 641                         break;
 642                 case KVM_REG_PPC_EBBRR:
 643                         *val = get_reg_val(id, vcpu->arch.ebbrr);
 644                         break;
 645                 case KVM_REG_PPC_BESCR:
 646                         *val = get_reg_val(id, vcpu->arch.bescr);
 647                         break;
 648                 case KVM_REG_PPC_IC:
 649                         *val = get_reg_val(id, vcpu->arch.ic);
 650                         break;
 651                 default:
 652                         r = -EINVAL;
 653                         break;
 654                 }
 655         }
 656
 657         return r;
 658 }
 659
 660 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
 661                         union kvmppc_one_reg *val)
 662 {
 663         int r = 0;
 664         long int i;
 665
 666         r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
 667         if (r == -EINVAL) {
 668                 r = 0;
 669                 switch (id) {
 670                 case KVM_REG_PPC_DAR:
 671                         kvmppc_set_dar(vcpu, set_reg_val(id, *val));
 672                         break;
 673                 case KVM_REG_PPC_DSISR:
 674                         kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
 675                         break;
 676                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
 677                         i = id - KVM_REG_PPC_FPR0;
 678                         VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
 679                         break;
 680                 case KVM_REG_PPC_FPSCR:
 681                         vcpu->arch.fp.fpscr = set_reg_val(id, *val);
 682                         break;
 683 #ifdef CONFIG_VSX
 684                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
 685                         if (cpu_has_feature(CPU_FTR_VSX)) {
 686                                 i = id - KVM_REG_PPC_VSR0;
 687                                 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
 688                                 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
 689                         } else {
 690                                 r = -ENXIO;
 691                         }
 692                         break;
 693 #endif /* CONFIG_VSX */
 694 #ifdef CONFIG_KVM_XICS
 695                 case KVM_REG_PPC_ICP_STATE:
 696                         if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
 697                                 r = -ENXIO;
 698                                 break;
 699                         }
 700                         if (xics_on_xive())
 701                                 r = kvmppc_xive_set_icp(vcpu, set_reg_val(id, *val));
 702                         else
 703                                 r = kvmppc_xics_set_icp(vcpu, set_reg_val(id, *val));
 704                         break;
 705 #endif /* CONFIG_KVM_XICS */
 706 #ifdef CONFIG_KVM_XIVE
 707                 case KVM_REG_PPC_VP_STATE:
 708                         if (!vcpu->arch.xive_vcpu) {
 709                                 r = -ENXIO;
 710                                 break;
 711                         }
 712                         if (xive_enabled())
 713                                 r = kvmppc_xive_native_set_vp(vcpu, val);
 714                         else
 715                                 r = -ENXIO;
 716                         break;
 717 #endif /* CONFIG_KVM_XIVE */
 718                 case KVM_REG_PPC_FSCR:
 719                         vcpu->arch.fscr = set_reg_val(id, *val);
 720                         break;
 721                 case KVM_REG_PPC_TAR:
 722                         vcpu->arch.tar = set_reg_val(id, *val);
 723                         break;
 724                 case KVM_REG_PPC_EBBHR:
 725                         vcpu->arch.ebbhr = set_reg_val(id, *val);
 726                         break;
 727                 case KVM_REG_PPC_EBBRR:
 728                         vcpu->arch.ebbrr = set_reg_val(id, *val);
 729                         break;
 730                 case KVM_REG_PPC_BESCR:
 731                         vcpu->arch.bescr = set_reg_val(id, *val);
 732                         break;
 733                 case KVM_REG_PPC_IC:
 734                         vcpu->arch.ic = set_reg_val(id, *val);
 735                         break;
 736                 default:
 737                         r = -EINVAL;
 738                         break;
 739                 }
 740         }
 741
 742         return r;
 743 }
 744
 745 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
 746 {
 747         vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
 748 }
 749
 750 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
 751 {
 752         vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
 753 }
 754
 755 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
 756 {
 757         vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
 758 }
 759 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
 760
 761 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
 762 {
 763         return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
 764 }
 765
 766 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
 767                                   struct kvm_translation *tr)
 768 {
 769         return 0;
 770 }
 771
 772 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
 773                                         struct kvm_guest_debug *dbg)
 774 {
 775         vcpu_load(vcpu);
 776         vcpu->guest_debug = dbg->control;
 777         vcpu_put(vcpu);
 778         return 0;
 779 }
 780
 781 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
 782 {
 783         kvmppc_core_queue_dec(vcpu);
 784         kvm_vcpu_kick(vcpu);
 785 }
 786
 787 int kvmppc_core_vcpu_create(struct kvm_vcpu *vcpu)
 788 {
 789         return vcpu->kvm->arch.kvm_ops->vcpu_create(vcpu);
 790 }
 791
 792 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
 793 {
 794         vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
 795 }
 796
 797 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
 798 {
 799         return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
 800 }
 801
 802 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
 803 {
 804         return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
 805 }
 806
 807 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
 808                               struct kvm_memory_slot *dont)
 809 {
 810         kvm->arch.kvm_ops->free_memslot(free, dont);
 811 }
 812
 813 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
 814                                unsigned long npages)
 815 {
 816         return kvm->arch.kvm_ops->create_memslot(slot, npages);
 817 }
 818
 819 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
 820 {
 821         kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
 822 }
 823
 824 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
 825                                 struct kvm_memory_slot *memslot,
 826                                 const struct kvm_userspace_memory_region *mem)
 827 {
 828         return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
 829 }
 830
 831 void kvmppc_core_commit_memory_region(struct kvm *kvm,
 832                                 const struct kvm_userspace_memory_region *mem,
 833                                 const struct kvm_memory_slot *old,
 834                                 const struct kvm_memory_slot *new,
 835                                 enum kvm_mr_change change)
 836 {
 837         kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new, change);
 838 }
 839
 840 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
 841 {
 842         return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
 843 }
 844
 845 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
 846 {
 847         return kvm->arch.kvm_ops->age_hva(kvm, start, end);
 848 }
 849
 850 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
 851 {
 852         return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
 853 }
 854
 855 int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 856 {
 857         kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
 858         return 0;
 859 }
 860
 861 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
 862 {
 863         vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
 864 }
 865
 866 int kvmppc_core_init_vm(struct kvm *kvm)
 867 {
 868
 869 #ifdef CONFIG_PPC64
 870         INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
 871         INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
 872         mutex_init(&kvm->arch.rtas_token_lock);
 873 #endif
 874
 875         return kvm->arch.kvm_ops->init_vm(kvm);
 876 }
 877
 878 void kvmppc_core_destroy_vm(struct kvm *kvm)
 879 {
 880         kvm->arch.kvm_ops->destroy_vm(kvm);
 881
 882 #ifdef CONFIG_PPC64
 883         kvmppc_rtas_tokens_free(kvm);
 884         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
 885 #endif
 886
 887 #ifdef CONFIG_KVM_XICS
 888         /*
 889          * Free the XIVE devices which are not directly freed by the
 890          * device 'release' method
 891          */
 892         kfree(kvm->arch.xive_devices.native);
 893         kvm->arch.xive_devices.native = NULL;
 894         kfree(kvm->arch.xive_devices.xics_on_xive);
 895         kvm->arch.xive_devices.xics_on_xive = NULL;
 896 #endif /* CONFIG_KVM_XICS */
 897 }
 898
 899 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
 900 {
 901         unsigned long size = kvmppc_get_gpr(vcpu, 4);
 902         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 903         u64 buf;
 904         int srcu_idx;
 905         int ret;
 906
 907         if (!is_power_of_2(size) || (size > sizeof(buf)))
 908                 return H_TOO_HARD;
 909
 910         srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 911         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 912         srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
 913         if (ret != 0)
 914                 return H_TOO_HARD;
 915
 916         switch (size) {
 917         case 1:
 918                 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
 919                 break;
 920
 921         case 2:
 922                 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
 923                 break;
 924
 925         case 4:
 926                 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
 927                 break;
 928
 929         case 8:
 930                 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
 931                 break;
 932
 933         default:
 934                 BUG();
 935         }
 936
 937         return H_SUCCESS;
 938 }
 939 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
 940
 941 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
 942 {
 943         unsigned long size = kvmppc_get_gpr(vcpu, 4);
 944         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
 945         unsigned long val = kvmppc_get_gpr(vcpu, 6);
 946         u64 buf;
 947         int srcu_idx;
 948         int ret;
 949
 950         switch (size) {
 951         case 1:
 952                 *(u8 *)&buf = val;
 953                 break;
 954
 955         case 2:
 956                 *(__be16 *)&buf = cpu_to_be16(val);
 957                 break;
 958
 959         case 4:
 960                 *(__be32 *)&buf = cpu_to_be32(val);
 961                 break;
 962
 963         case 8:
 964                 *(__be64 *)&buf = cpu_to_be64(val);
 965                 break;
 966
 967         default:
 968                 return H_TOO_HARD;
 969         }
 970
 971         srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 972         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
 973         srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
 974         if (ret != 0)
 975                 return H_TOO_HARD;
 976
 977         return H_SUCCESS;
 978 }
 979 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
 980
 981 int kvmppc_core_check_processor_compat(void)
 982 {
 983         /*
 984          * We always return 0 for book3s. We check
 985          * for compatibility while loading the HV
 986          * or PR module
 987          */
 988         return 0;
 989 }
 990
 991 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
 992 {
 993         return kvm->arch.kvm_ops->hcall_implemented(hcall);
 994 }
 995
 996 #ifdef CONFIG_KVM_XICS
 997 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
 998                 bool line_status)
 999 {
1000         if (xics_on_xive())
1001                 return kvmppc_xive_set_irq(kvm, irq_source_id, irq, level,
1002                                            line_status);
1003         else
1004                 return kvmppc_xics_set_irq(kvm, irq_source_id, irq, level,
1005                                            line_status);
1006 }
1007
1008 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *irq_entry,
1009                               struct kvm *kvm, int irq_source_id,
1010                               int level, bool line_status)
1011 {
1012         return kvm_set_irq(kvm, irq_source_id, irq_entry->gsi,
1013                            level, line_status);
1014 }
1015 static int kvmppc_book3s_set_irq(struct kvm_kernel_irq_routing_entry *e,
1016                                  struct kvm *kvm, int irq_source_id, int level,
1017                                  bool line_status)
1018 {
1019         return kvm_set_irq(kvm, irq_source_id, e->gsi, level, line_status);
1020 }
1021
1022 int kvm_irq_map_gsi(struct kvm *kvm,
1023                     struct kvm_kernel_irq_routing_entry *entries, int gsi)
1024 {
1025         entries->gsi = gsi;
1026         entries->type = KVM_IRQ_ROUTING_IRQCHIP;
1027         entries->set = kvmppc_book3s_set_irq;
1028         entries->irqchip.irqchip = 0;
1029         entries->irqchip.pin = gsi;
1030         return 1;
1031 }
1032
1033 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin)
1034 {
1035         return pin;
1036 }
1037
1038 #endif /* CONFIG_KVM_XICS */
1039
1040 static int kvmppc_book3s_init(void)
1041 {
1042         int r;
1043
1044         r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
1045         if (r)
1046                 return r;
1047 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1048         r = kvmppc_book3s_init_pr();
1049 #endif
1050
1051 #ifdef CONFIG_KVM_XICS
1052 #ifdef CONFIG_KVM_XIVE
1053         if (xics_on_xive()) {
1054                 kvmppc_xive_init_module();
1055                 kvm_register_device_ops(&kvm_xive_ops, KVM_DEV_TYPE_XICS);
1056                 if (kvmppc_xive_native_supported()) {
1057                         kvmppc_xive_native_init_module();
1058                         kvm_register_device_ops(&kvm_xive_native_ops,
1059                                                 KVM_DEV_TYPE_XIVE);
1060                 }
1061         } else
1062 #endif
1063                 kvm_register_device_ops(&kvm_xics_ops, KVM_DEV_TYPE_XICS);
1064 #endif
1065         return r;
1066 }
1067
1068 static void kvmppc_book3s_exit(void)
1069 {
1070 #ifdef CONFIG_KVM_XICS
1071         if (xics_on_xive()) {
1072                 kvmppc_xive_exit_module();
1073                 kvmppc_xive_native_exit_module();
1074         }
1075 #endif
1076 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1077         kvmppc_book3s_exit_pr();
1078 #endif
1079         kvm_exit();
1080 }
1081
1082 module_init(kvmppc_book3s_init);
1083 module_exit(kvmppc_book3s_exit);
1084
1085 /* On 32bit this is our one and only kernel module */
1086 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1087 MODULE_ALIAS_MISCDEV(KVM_MINOR);
1088 MODULE_ALIAS("devname:kvm");
1089 #endif