1 /* 2 * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved. 3 * 4 * Authors: 5 * Alexander Graf <agraf@suse.de> 6 * Kevin Wolf <mail@kevin-wolf.de> 7 * 8 * Description: 9 * This file is derived from arch/powerpc/kvm/44x.c, 10 * by Hollis Blanchard <hollisb@us.ibm.com>. 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License, version 2, as 14 * published by the Free Software Foundation. 15 */ 16 17 #include <linux/kvm_host.h> 18 #include <linux/err.h> 19 #include <linux/export.h> 20 #include <linux/slab.h> 21 22 #include <asm/reg.h> 23 #include <asm/cputable.h> 24 #include <asm/cacheflush.h> 25 #include <asm/tlbflush.h> 26 #include <asm/uaccess.h> 27 #include <asm/io.h> 28 #include <asm/kvm_ppc.h> 29 #include <asm/kvm_book3s.h> 30 #include <asm/mmu_context.h> 31 #include <asm/page.h> 32 #include <linux/gfp.h> 33 #include <linux/sched.h> 34 #include <linux/vmalloc.h> 35 #include <linux/highmem.h> 36 37 #include "trace.h" 38 39 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU 40 41 /* #define EXIT_DEBUG */ 42 43 struct kvm_stats_debugfs_item debugfs_entries[] = { 44 { "exits", VCPU_STAT(sum_exits) }, 45 { "mmio", VCPU_STAT(mmio_exits) }, 46 { "sig", VCPU_STAT(signal_exits) }, 47 { "sysc", VCPU_STAT(syscall_exits) }, 48 { "inst_emu", VCPU_STAT(emulated_inst_exits) }, 49 { "dec", VCPU_STAT(dec_exits) }, 50 { "ext_intr", VCPU_STAT(ext_intr_exits) }, 51 { "queue_intr", VCPU_STAT(queue_intr) }, 52 { "halt_wakeup", VCPU_STAT(halt_wakeup) }, 53 { "pf_storage", VCPU_STAT(pf_storage) }, 54 { "sp_storage", VCPU_STAT(sp_storage) }, 55 { "pf_instruc", VCPU_STAT(pf_instruc) }, 56 { "sp_instruc", VCPU_STAT(sp_instruc) }, 57 { "ld", VCPU_STAT(ld) }, 58 { "ld_slow", VCPU_STAT(ld_slow) }, 59 { "st", VCPU_STAT(st) }, 60 { "st_slow", VCPU_STAT(st_slow) }, 61 { NULL } 62 }; 63 64 void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu) 65 { 66 } 67 68 void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu) 69 { 70 } 71 72 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags) 73 { 74 vcpu->arch.shared->srr0 = kvmppc_get_pc(vcpu); 75 vcpu->arch.shared->srr1 = vcpu->arch.shared->msr | flags; 76 kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec); 77 vcpu->arch.mmu.reset_msr(vcpu); 78 } 79 80 static int kvmppc_book3s_vec2irqprio(unsigned int vec) 81 { 82 unsigned int prio; 83 84 switch (vec) { 85 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break; 86 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break; 87 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break; 88 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break; 89 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break; 90 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break; 91 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break; 92 case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL; break; 93 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break; 94 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break; 95 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break; 96 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break; 97 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break; 98 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break; 99 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break; 100 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break; 101 default: prio = BOOK3S_IRQPRIO_MAX; break; 102 } 103 104 return prio; 105 } 106 107 static void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu, 108 unsigned int vec) 109 { 110 unsigned long old_pending = vcpu->arch.pending_exceptions; 111 112 clear_bit(kvmppc_book3s_vec2irqprio(vec), 113 &vcpu->arch.pending_exceptions); 114 115 kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions, 116 old_pending); 117 } 118 119 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec) 120 { 121 vcpu->stat.queue_intr++; 122 123 set_bit(kvmppc_book3s_vec2irqprio(vec), 124 &vcpu->arch.pending_exceptions); 125 #ifdef EXIT_DEBUG 126 printk(KERN_INFO "Queueing interrupt %x\n", vec); 127 #endif 128 } 129 130 131 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags) 132 { 133 /* might as well deliver this straight away */ 134 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags); 135 } 136 137 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu) 138 { 139 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER); 140 } 141 142 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu) 143 { 144 return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions); 145 } 146 147 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu) 148 { 149 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER); 150 } 151 152 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu, 153 struct kvm_interrupt *irq) 154 { 155 unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL; 156 157 if (irq->irq == KVM_INTERRUPT_SET_LEVEL) 158 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL; 159 160 kvmppc_book3s_queue_irqprio(vcpu, vec); 161 } 162 163 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu, 164 struct kvm_interrupt *irq) 165 { 166 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL); 167 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL); 168 } 169 170 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority) 171 { 172 int deliver = 1; 173 int vec = 0; 174 bool crit = kvmppc_critical_section(vcpu); 175 176 switch (priority) { 177 case BOOK3S_IRQPRIO_DECREMENTER: 178 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit; 179 vec = BOOK3S_INTERRUPT_DECREMENTER; 180 break; 181 case BOOK3S_IRQPRIO_EXTERNAL: 182 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL: 183 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit; 184 vec = BOOK3S_INTERRUPT_EXTERNAL; 185 break; 186 case BOOK3S_IRQPRIO_SYSTEM_RESET: 187 vec = BOOK3S_INTERRUPT_SYSTEM_RESET; 188 break; 189 case BOOK3S_IRQPRIO_MACHINE_CHECK: 190 vec = BOOK3S_INTERRUPT_MACHINE_CHECK; 191 break; 192 case BOOK3S_IRQPRIO_DATA_STORAGE: 193 vec = BOOK3S_INTERRUPT_DATA_STORAGE; 194 break; 195 case BOOK3S_IRQPRIO_INST_STORAGE: 196 vec = BOOK3S_INTERRUPT_INST_STORAGE; 197 break; 198 case BOOK3S_IRQPRIO_DATA_SEGMENT: 199 vec = BOOK3S_INTERRUPT_DATA_SEGMENT; 200 break; 201 case BOOK3S_IRQPRIO_INST_SEGMENT: 202 vec = BOOK3S_INTERRUPT_INST_SEGMENT; 203 break; 204 case BOOK3S_IRQPRIO_ALIGNMENT: 205 vec = BOOK3S_INTERRUPT_ALIGNMENT; 206 break; 207 case BOOK3S_IRQPRIO_PROGRAM: 208 vec = BOOK3S_INTERRUPT_PROGRAM; 209 break; 210 case BOOK3S_IRQPRIO_VSX: 211 vec = BOOK3S_INTERRUPT_VSX; 212 break; 213 case BOOK3S_IRQPRIO_ALTIVEC: 214 vec = BOOK3S_INTERRUPT_ALTIVEC; 215 break; 216 case BOOK3S_IRQPRIO_FP_UNAVAIL: 217 vec = BOOK3S_INTERRUPT_FP_UNAVAIL; 218 break; 219 case BOOK3S_IRQPRIO_SYSCALL: 220 vec = BOOK3S_INTERRUPT_SYSCALL; 221 break; 222 case BOOK3S_IRQPRIO_DEBUG: 223 vec = BOOK3S_INTERRUPT_TRACE; 224 break; 225 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR: 226 vec = BOOK3S_INTERRUPT_PERFMON; 227 break; 228 default: 229 deliver = 0; 230 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority); 231 break; 232 } 233 234 #if 0 235 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver); 236 #endif 237 238 if (deliver) 239 kvmppc_inject_interrupt(vcpu, vec, 0); 240 241 return deliver; 242 } 243 244 /* 245 * This function determines if an irqprio should be cleared once issued. 246 */ 247 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority) 248 { 249 switch (priority) { 250 case BOOK3S_IRQPRIO_DECREMENTER: 251 /* DEC interrupts get cleared by mtdec */ 252 return false; 253 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL: 254 /* External interrupts get cleared by userspace */ 255 return false; 256 } 257 258 return true; 259 } 260 261 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu) 262 { 263 unsigned long *pending = &vcpu->arch.pending_exceptions; 264 unsigned long old_pending = vcpu->arch.pending_exceptions; 265 unsigned int priority; 266 267 #ifdef EXIT_DEBUG 268 if (vcpu->arch.pending_exceptions) 269 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions); 270 #endif 271 priority = __ffs(*pending); 272 while (priority < BOOK3S_IRQPRIO_MAX) { 273 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) && 274 clear_irqprio(vcpu, priority)) { 275 clear_bit(priority, &vcpu->arch.pending_exceptions); 276 break; 277 } 278 279 priority = find_next_bit(pending, 280 BITS_PER_BYTE * sizeof(*pending), 281 priority + 1); 282 } 283 284 /* Tell the guest about our interrupt status */ 285 kvmppc_update_int_pending(vcpu, *pending, old_pending); 286 287 return 0; 288 } 289 290 pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn) 291 { 292 ulong mp_pa = vcpu->arch.magic_page_pa; 293 294 if (!(vcpu->arch.shared->msr & MSR_SF)) 295 mp_pa = (uint32_t)mp_pa; 296 297 /* Magic page override */ 298 if (unlikely(mp_pa) && 299 unlikely(((gfn << PAGE_SHIFT) & KVM_PAM) == 300 ((mp_pa & PAGE_MASK) & KVM_PAM))) { 301 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK; 302 pfn_t pfn; 303 304 pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT; 305 get_page(pfn_to_page(pfn)); 306 return pfn; 307 } 308 309 return gfn_to_pfn(vcpu->kvm, gfn); 310 } 311 312 static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data, 313 struct kvmppc_pte *pte) 314 { 315 int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR)); 316 int r; 317 318 if (relocated) { 319 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data); 320 } else { 321 pte->eaddr = eaddr; 322 pte->raddr = eaddr & KVM_PAM; 323 pte->vpage = VSID_REAL | eaddr >> 12; 324 pte->may_read = true; 325 pte->may_write = true; 326 pte->may_execute = true; 327 r = 0; 328 } 329 330 return r; 331 } 332 333 static hva_t kvmppc_bad_hva(void) 334 { 335 return PAGE_OFFSET; 336 } 337 338 static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte, 339 bool read) 340 { 341 hva_t hpage; 342 343 if (read && !pte->may_read) 344 goto err; 345 346 if (!read && !pte->may_write) 347 goto err; 348 349 hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT); 350 if (kvm_is_error_hva(hpage)) 351 goto err; 352 353 return hpage | (pte->raddr & ~PAGE_MASK); 354 err: 355 return kvmppc_bad_hva(); 356 } 357 358 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, 359 bool data) 360 { 361 struct kvmppc_pte pte; 362 363 vcpu->stat.st++; 364 365 if (kvmppc_xlate(vcpu, *eaddr, data, &pte)) 366 return -ENOENT; 367 368 *eaddr = pte.raddr; 369 370 if (!pte.may_write) 371 return -EPERM; 372 373 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size)) 374 return EMULATE_DO_MMIO; 375 376 return EMULATE_DONE; 377 } 378 379 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, 380 bool data) 381 { 382 struct kvmppc_pte pte; 383 hva_t hva = *eaddr; 384 385 vcpu->stat.ld++; 386 387 if (kvmppc_xlate(vcpu, *eaddr, data, &pte)) 388 goto nopte; 389 390 *eaddr = pte.raddr; 391 392 hva = kvmppc_pte_to_hva(vcpu, &pte, true); 393 if (kvm_is_error_hva(hva)) 394 goto mmio; 395 396 if (copy_from_user(ptr, (void __user *)hva, size)) { 397 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva); 398 goto mmio; 399 } 400 401 return EMULATE_DONE; 402 403 nopte: 404 return -ENOENT; 405 mmio: 406 return EMULATE_DO_MMIO; 407 } 408 409 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) 410 { 411 return 0; 412 } 413 414 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu) 415 { 416 return 0; 417 } 418 419 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu) 420 { 421 } 422 423 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 424 { 425 int i; 426 427 regs->pc = kvmppc_get_pc(vcpu); 428 regs->cr = kvmppc_get_cr(vcpu); 429 regs->ctr = kvmppc_get_ctr(vcpu); 430 regs->lr = kvmppc_get_lr(vcpu); 431 regs->xer = kvmppc_get_xer(vcpu); 432 regs->msr = vcpu->arch.shared->msr; 433 regs->srr0 = vcpu->arch.shared->srr0; 434 regs->srr1 = vcpu->arch.shared->srr1; 435 regs->pid = vcpu->arch.pid; 436 regs->sprg0 = vcpu->arch.shared->sprg0; 437 regs->sprg1 = vcpu->arch.shared->sprg1; 438 regs->sprg2 = vcpu->arch.shared->sprg2; 439 regs->sprg3 = vcpu->arch.shared->sprg3; 440 regs->sprg4 = vcpu->arch.shared->sprg4; 441 regs->sprg5 = vcpu->arch.shared->sprg5; 442 regs->sprg6 = vcpu->arch.shared->sprg6; 443 regs->sprg7 = vcpu->arch.shared->sprg7; 444 445 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 446 regs->gpr[i] = kvmppc_get_gpr(vcpu, i); 447 448 return 0; 449 } 450 451 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) 452 { 453 int i; 454 455 kvmppc_set_pc(vcpu, regs->pc); 456 kvmppc_set_cr(vcpu, regs->cr); 457 kvmppc_set_ctr(vcpu, regs->ctr); 458 kvmppc_set_lr(vcpu, regs->lr); 459 kvmppc_set_xer(vcpu, regs->xer); 460 kvmppc_set_msr(vcpu, regs->msr); 461 vcpu->arch.shared->srr0 = regs->srr0; 462 vcpu->arch.shared->srr1 = regs->srr1; 463 vcpu->arch.shared->sprg0 = regs->sprg0; 464 vcpu->arch.shared->sprg1 = regs->sprg1; 465 vcpu->arch.shared->sprg2 = regs->sprg2; 466 vcpu->arch.shared->sprg3 = regs->sprg3; 467 vcpu->arch.shared->sprg4 = regs->sprg4; 468 vcpu->arch.shared->sprg5 = regs->sprg5; 469 vcpu->arch.shared->sprg6 = regs->sprg6; 470 vcpu->arch.shared->sprg7 = regs->sprg7; 471 472 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++) 473 kvmppc_set_gpr(vcpu, i, regs->gpr[i]); 474 475 return 0; 476 } 477 478 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 479 { 480 return -ENOTSUPP; 481 } 482 483 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) 484 { 485 return -ENOTSUPP; 486 } 487 488 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) 489 { 490 int r; 491 union kvmppc_one_reg val; 492 int size; 493 long int i; 494 495 size = one_reg_size(reg->id); 496 if (size > sizeof(val)) 497 return -EINVAL; 498 499 r = kvmppc_get_one_reg(vcpu, reg->id, &val); 500 501 if (r == -EINVAL) { 502 r = 0; 503 switch (reg->id) { 504 case KVM_REG_PPC_DAR: 505 val = get_reg_val(reg->id, vcpu->arch.shared->dar); 506 break; 507 case KVM_REG_PPC_DSISR: 508 val = get_reg_val(reg->id, vcpu->arch.shared->dsisr); 509 break; 510 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31: 511 i = reg->id - KVM_REG_PPC_FPR0; 512 val = get_reg_val(reg->id, vcpu->arch.fpr[i]); 513 break; 514 case KVM_REG_PPC_FPSCR: 515 val = get_reg_val(reg->id, vcpu->arch.fpscr); 516 break; 517 #ifdef CONFIG_ALTIVEC 518 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31: 519 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 520 r = -ENXIO; 521 break; 522 } 523 val.vval = vcpu->arch.vr[reg->id - KVM_REG_PPC_VR0]; 524 break; 525 case KVM_REG_PPC_VSCR: 526 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 527 r = -ENXIO; 528 break; 529 } 530 val = get_reg_val(reg->id, vcpu->arch.vscr.u[3]); 531 break; 532 #endif /* CONFIG_ALTIVEC */ 533 default: 534 r = -EINVAL; 535 break; 536 } 537 } 538 if (r) 539 return r; 540 541 if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size)) 542 r = -EFAULT; 543 544 return r; 545 } 546 547 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg) 548 { 549 int r; 550 union kvmppc_one_reg val; 551 int size; 552 long int i; 553 554 size = one_reg_size(reg->id); 555 if (size > sizeof(val)) 556 return -EINVAL; 557 558 if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size)) 559 return -EFAULT; 560 561 r = kvmppc_set_one_reg(vcpu, reg->id, &val); 562 563 if (r == -EINVAL) { 564 r = 0; 565 switch (reg->id) { 566 case KVM_REG_PPC_DAR: 567 vcpu->arch.shared->dar = set_reg_val(reg->id, val); 568 break; 569 case KVM_REG_PPC_DSISR: 570 vcpu->arch.shared->dsisr = set_reg_val(reg->id, val); 571 break; 572 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31: 573 i = reg->id - KVM_REG_PPC_FPR0; 574 vcpu->arch.fpr[i] = set_reg_val(reg->id, val); 575 break; 576 case KVM_REG_PPC_FPSCR: 577 vcpu->arch.fpscr = set_reg_val(reg->id, val); 578 break; 579 #ifdef CONFIG_ALTIVEC 580 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31: 581 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 582 r = -ENXIO; 583 break; 584 } 585 vcpu->arch.vr[reg->id - KVM_REG_PPC_VR0] = val.vval; 586 break; 587 case KVM_REG_PPC_VSCR: 588 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) { 589 r = -ENXIO; 590 break; 591 } 592 vcpu->arch.vscr.u[3] = set_reg_val(reg->id, val); 593 break; 594 #endif /* CONFIG_ALTIVEC */ 595 default: 596 r = -EINVAL; 597 break; 598 } 599 } 600 601 return r; 602 } 603 604 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, 605 struct kvm_translation *tr) 606 { 607 return 0; 608 } 609 610 void kvmppc_decrementer_func(unsigned long data) 611 { 612 struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data; 613 614 kvmppc_core_queue_dec(vcpu); 615 kvm_vcpu_kick(vcpu); 616 } 617