1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright IBM Corp. 2007
6 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
7 * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
10 #include <linux/errno.h>
11 #include <linux/err.h>
12 #include <linux/kvm_host.h>
13 #include <linux/vmalloc.h>
14 #include <linux/hrtimer.h>
15 #include <linux/sched/signal.h>
17 #include <linux/slab.h>
18 #include <linux/file.h>
19 #include <linux/module.h>
20 #include <linux/irqbypass.h>
21 #include <linux/kvm_irqfd.h>
22 #include <asm/cputable.h>
23 #include <linux/uaccess.h>
24 #include <asm/kvm_ppc.h>
25 #include <asm/cputhreads.h>
26 #include <asm/irqflags.h>
27 #include <asm/iommu.h>
28 #include <asm/switch_to.h>
30 #ifdef CONFIG_PPC_PSERIES
31 #include <asm/hvcall.h>
32 #include <asm/plpar_wrappers.h>
37 #include "../mm/mmu_decl.h"
39 #define CREATE_TRACE_POINTS
42 struct kvmppc_ops *kvmppc_hv_ops;
43 EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
44 struct kvmppc_ops *kvmppc_pr_ops;
45 EXPORT_SYMBOL_GPL(kvmppc_pr_ops);
48 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
50 return !!(v->arch.pending_exceptions) || kvm_request_pending(v);
53 bool kvm_arch_dy_runnable(struct kvm_vcpu *vcpu)
55 return kvm_arch_vcpu_runnable(vcpu);
58 bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
63 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
69 * Common checks before entering the guest world. Call with interrupts
74 * == 1 if we're ready to go into guest state
75 * <= 0 if we need to go back to the host with return value
77 int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
81 WARN_ON(irqs_disabled());
92 if (signal_pending(current)) {
93 kvmppc_account_exit(vcpu, SIGNAL_EXITS);
94 vcpu->run->exit_reason = KVM_EXIT_INTR;
99 vcpu->mode = IN_GUEST_MODE;
102 * Reading vcpu->requests must happen after setting vcpu->mode,
103 * so we don't miss a request because the requester sees
104 * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
105 * before next entering the guest (and thus doesn't IPI).
106 * This also orders the write to mode from any reads
107 * to the page tables done while the VCPU is running.
108 * Please see the comment in kvm_flush_remote_tlbs.
112 if (kvm_request_pending(vcpu)) {
113 /* Make sure we process requests preemptable */
115 trace_kvm_check_requests(vcpu);
116 r = kvmppc_core_check_requests(vcpu);
123 if (kvmppc_core_prepare_to_enter(vcpu)) {
124 /* interrupts got enabled in between, so we
125 are back at square 1 */
129 guest_enter_irqoff();
137 EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
139 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
140 static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
142 struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
145 shared->sprg0 = swab64(shared->sprg0);
146 shared->sprg1 = swab64(shared->sprg1);
147 shared->sprg2 = swab64(shared->sprg2);
148 shared->sprg3 = swab64(shared->sprg3);
149 shared->srr0 = swab64(shared->srr0);
150 shared->srr1 = swab64(shared->srr1);
151 shared->dar = swab64(shared->dar);
152 shared->msr = swab64(shared->msr);
153 shared->dsisr = swab32(shared->dsisr);
154 shared->int_pending = swab32(shared->int_pending);
155 for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
156 shared->sr[i] = swab32(shared->sr[i]);
160 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
162 int nr = kvmppc_get_gpr(vcpu, 11);
164 unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
165 unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
166 unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
167 unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
168 unsigned long r2 = 0;
170 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
172 param1 &= 0xffffffff;
173 param2 &= 0xffffffff;
174 param3 &= 0xffffffff;
175 param4 &= 0xffffffff;
179 case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
181 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
182 /* Book3S can be little endian, find it out here */
183 int shared_big_endian = true;
184 if (vcpu->arch.intr_msr & MSR_LE)
185 shared_big_endian = false;
186 if (shared_big_endian != vcpu->arch.shared_big_endian)
187 kvmppc_swab_shared(vcpu);
188 vcpu->arch.shared_big_endian = shared_big_endian;
191 if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
193 * Older versions of the Linux magic page code had
194 * a bug where they would map their trampoline code
195 * NX. If that's the case, remove !PR NX capability.
197 vcpu->arch.disable_kernel_nx = true;
198 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
201 vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
202 vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
204 #ifdef CONFIG_PPC_64K_PAGES
206 * Make sure our 4k magic page is in the same window of a 64k
207 * page within the guest and within the host's page.
209 if ((vcpu->arch.magic_page_pa & 0xf000) !=
210 ((ulong)vcpu->arch.shared & 0xf000)) {
211 void *old_shared = vcpu->arch.shared;
212 ulong shared = (ulong)vcpu->arch.shared;
216 shared |= vcpu->arch.magic_page_pa & 0xf000;
217 new_shared = (void*)shared;
218 memcpy(new_shared, old_shared, 0x1000);
219 vcpu->arch.shared = new_shared;
223 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
228 case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
230 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
231 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
234 /* Second return value is in r4 */
236 case EV_HCALL_TOKEN(EV_IDLE):
238 kvm_vcpu_block(vcpu);
239 kvm_clear_request(KVM_REQ_UNHALT, vcpu);
242 r = EV_UNIMPLEMENTED;
246 kvmppc_set_gpr(vcpu, 4, r2);
250 EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
252 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
256 /* We have to know what CPU to virtualize */
260 /* PAPR only works with book3s_64 */
261 if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
264 /* HV KVM can only do PAPR mode for now */
265 if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
268 #ifdef CONFIG_KVM_BOOKE_HV
269 if (!cpu_has_feature(CPU_FTR_EMB_HV))
277 return r ? 0 : -EINVAL;
279 EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
281 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
283 enum emulation_result er;
286 er = kvmppc_emulate_loadstore(vcpu);
289 /* Future optimization: only reload non-volatiles if they were
290 * actually modified. */
296 case EMULATE_DO_MMIO:
297 run->exit_reason = KVM_EXIT_MMIO;
298 /* We must reload nonvolatiles because "update" load/store
299 * instructions modify register state. */
300 /* Future optimization: only reload non-volatiles if they were
301 * actually modified. */
308 kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
309 /* XXX Deliver Program interrupt to guest. */
310 pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
321 EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
323 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
326 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
327 struct kvmppc_pte pte;
332 if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->store_to_eaddr)
333 r = vcpu->kvm->arch.kvm_ops->store_to_eaddr(vcpu, eaddr, ptr,
336 if ((!r) || (r == -EAGAIN))
339 r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
349 /* Magic page override */
350 if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
351 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
352 !(kvmppc_get_msr(vcpu) & MSR_PR)) {
353 void *magic = vcpu->arch.shared;
354 magic += pte.eaddr & 0xfff;
355 memcpy(magic, ptr, size);
359 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
360 return EMULATE_DO_MMIO;
364 EXPORT_SYMBOL_GPL(kvmppc_st);
366 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
369 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
370 struct kvmppc_pte pte;
375 if (vcpu->kvm->arch.kvm_ops && vcpu->kvm->arch.kvm_ops->load_from_eaddr)
376 rc = vcpu->kvm->arch.kvm_ops->load_from_eaddr(vcpu, eaddr, ptr,
379 if ((!rc) || (rc == -EAGAIN))
382 rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
392 if (!data && !pte.may_execute)
395 /* Magic page override */
396 if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
397 ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
398 !(kvmppc_get_msr(vcpu) & MSR_PR)) {
399 void *magic = vcpu->arch.shared;
400 magic += pte.eaddr & 0xfff;
401 memcpy(ptr, magic, size);
405 if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
406 return EMULATE_DO_MMIO;
410 EXPORT_SYMBOL_GPL(kvmppc_ld);
412 int kvm_arch_hardware_enable(void)
417 int kvm_arch_hardware_setup(void)
422 int kvm_arch_check_processor_compat(void)
424 return kvmppc_core_check_processor_compat();
427 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
429 struct kvmppc_ops *kvm_ops = NULL;
431 * if we have both HV and PR enabled, default is HV
435 kvm_ops = kvmppc_hv_ops;
437 kvm_ops = kvmppc_pr_ops;
440 } else if (type == KVM_VM_PPC_HV) {
443 kvm_ops = kvmppc_hv_ops;
444 } else if (type == KVM_VM_PPC_PR) {
447 kvm_ops = kvmppc_pr_ops;
451 if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
454 kvm->arch.kvm_ops = kvm_ops;
455 return kvmppc_core_init_vm(kvm);
460 void kvm_arch_destroy_vm(struct kvm *kvm)
463 struct kvm_vcpu *vcpu;
465 #ifdef CONFIG_KVM_XICS
467 * We call kick_all_cpus_sync() to ensure that all
468 * CPUs have executed any pending IPIs before we
469 * continue and free VCPUs structures below.
471 if (is_kvmppc_hv_enabled(kvm))
472 kick_all_cpus_sync();
475 kvm_for_each_vcpu(i, vcpu, kvm)
476 kvm_arch_vcpu_free(vcpu);
478 mutex_lock(&kvm->lock);
479 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
480 kvm->vcpus[i] = NULL;
482 atomic_set(&kvm->online_vcpus, 0);
484 kvmppc_core_destroy_vm(kvm);
486 mutex_unlock(&kvm->lock);
488 /* drop the module reference */
489 module_put(kvm->arch.kvm_ops->owner);
492 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
495 /* Assume we're using HV mode when the HV module is loaded */
496 int hv_enabled = kvmppc_hv_ops ? 1 : 0;
500 * Hooray - we know which VM type we're running on. Depend on
501 * that rather than the guess above.
503 hv_enabled = is_kvmppc_hv_enabled(kvm);
508 case KVM_CAP_PPC_BOOKE_SREGS:
509 case KVM_CAP_PPC_BOOKE_WATCHDOG:
510 case KVM_CAP_PPC_EPR:
512 case KVM_CAP_PPC_SEGSTATE:
513 case KVM_CAP_PPC_HIOR:
514 case KVM_CAP_PPC_PAPR:
516 case KVM_CAP_PPC_UNSET_IRQ:
517 case KVM_CAP_PPC_IRQ_LEVEL:
518 case KVM_CAP_ENABLE_CAP:
519 case KVM_CAP_ONE_REG:
520 case KVM_CAP_IOEVENTFD:
521 case KVM_CAP_DEVICE_CTRL:
522 case KVM_CAP_IMMEDIATE_EXIT:
525 case KVM_CAP_PPC_GUEST_DEBUG_SSTEP:
527 case KVM_CAP_PPC_PAIRED_SINGLES:
528 case KVM_CAP_PPC_OSI:
529 case KVM_CAP_PPC_GET_PVINFO:
530 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
533 /* We support this only for PR */
536 #ifdef CONFIG_KVM_MPIC
537 case KVM_CAP_IRQ_MPIC:
542 #ifdef CONFIG_PPC_BOOK3S_64
543 case KVM_CAP_SPAPR_TCE:
544 case KVM_CAP_SPAPR_TCE_64:
547 case KVM_CAP_SPAPR_TCE_VFIO:
548 r = !!cpu_has_feature(CPU_FTR_HVMODE);
550 case KVM_CAP_PPC_RTAS:
551 case KVM_CAP_PPC_FIXUP_HCALL:
552 case KVM_CAP_PPC_ENABLE_HCALL:
553 #ifdef CONFIG_KVM_XICS
554 case KVM_CAP_IRQ_XICS:
556 case KVM_CAP_PPC_GET_CPU_CHAR:
559 #ifdef CONFIG_KVM_XIVE
560 case KVM_CAP_PPC_IRQ_XIVE:
562 * We need XIVE to be enabled on the platform (implies
563 * a POWER9 processor) and the PowerNV platform, as
564 * nested is not yet supported.
566 r = xive_enabled() && !!cpu_has_feature(CPU_FTR_HVMODE) &&
567 kvmppc_xive_native_supported();
571 case KVM_CAP_PPC_ALLOC_HTAB:
574 #endif /* CONFIG_PPC_BOOK3S_64 */
575 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
576 case KVM_CAP_PPC_SMT:
579 if (kvm->arch.emul_smt_mode > 1)
580 r = kvm->arch.emul_smt_mode;
582 r = kvm->arch.smt_mode;
583 } else if (hv_enabled) {
584 if (cpu_has_feature(CPU_FTR_ARCH_300))
587 r = threads_per_subcore;
590 case KVM_CAP_PPC_SMT_POSSIBLE:
593 if (!cpu_has_feature(CPU_FTR_ARCH_300))
594 r = ((threads_per_subcore << 1) - 1);
596 /* P9 can emulate dbells, so allow any mode */
600 case KVM_CAP_PPC_RMA:
603 case KVM_CAP_PPC_HWRNG:
604 r = kvmppc_hwrng_present();
606 case KVM_CAP_PPC_MMU_RADIX:
607 r = !!(hv_enabled && radix_enabled());
609 case KVM_CAP_PPC_MMU_HASH_V3:
610 r = !!(hv_enabled && cpu_has_feature(CPU_FTR_ARCH_300) &&
611 cpu_has_feature(CPU_FTR_HVMODE));
613 case KVM_CAP_PPC_NESTED_HV:
614 r = !!(hv_enabled && kvmppc_hv_ops->enable_nested &&
615 !kvmppc_hv_ops->enable_nested(NULL));
618 case KVM_CAP_SYNC_MMU:
619 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
621 #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
627 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
628 case KVM_CAP_PPC_HTAB_FD:
632 case KVM_CAP_NR_VCPUS:
634 * Recommending a number of CPUs is somewhat arbitrary; we
635 * return the number of present CPUs for -HV (since a host
636 * will have secondary threads "offline"), and for other KVM
637 * implementations just count online CPUs.
640 r = num_present_cpus();
642 r = num_online_cpus();
644 case KVM_CAP_MAX_VCPUS:
647 case KVM_CAP_MAX_VCPU_ID:
650 #ifdef CONFIG_PPC_BOOK3S_64
651 case KVM_CAP_PPC_GET_SMMU_INFO:
654 case KVM_CAP_SPAPR_MULTITCE:
657 case KVM_CAP_SPAPR_RESIZE_HPT:
661 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
662 case KVM_CAP_PPC_FWNMI:
666 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
667 case KVM_CAP_PPC_HTM:
668 r = !!(cur_cpu_spec->cpu_user_features2 & PPC_FEATURE2_HTM) ||
669 (hv_enabled && cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST));
680 long kvm_arch_dev_ioctl(struct file *filp,
681 unsigned int ioctl, unsigned long arg)
686 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
687 struct kvm_memory_slot *dont)
689 kvmppc_core_free_memslot(kvm, free, dont);
692 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
693 unsigned long npages)
695 return kvmppc_core_create_memslot(kvm, slot, npages);
698 int kvm_arch_prepare_memory_region(struct kvm *kvm,
699 struct kvm_memory_slot *memslot,
700 const struct kvm_userspace_memory_region *mem,
701 enum kvm_mr_change change)
703 return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
706 void kvm_arch_commit_memory_region(struct kvm *kvm,
707 const struct kvm_userspace_memory_region *mem,
708 const struct kvm_memory_slot *old,
709 const struct kvm_memory_slot *new,
710 enum kvm_mr_change change)
712 kvmppc_core_commit_memory_region(kvm, mem, old, new, change);
715 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
716 struct kvm_memory_slot *slot)
718 kvmppc_core_flush_memslot(kvm, slot);
721 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
723 struct kvm_vcpu *vcpu;
724 vcpu = kvmppc_core_vcpu_create(kvm, id);
726 vcpu->arch.wqp = &vcpu->wq;
727 kvmppc_create_vcpu_debugfs(vcpu, id);
732 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
736 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
738 /* Make sure we're not using the vcpu anymore */
739 hrtimer_cancel(&vcpu->arch.dec_timer);
741 kvmppc_remove_vcpu_debugfs(vcpu);
743 switch (vcpu->arch.irq_type) {
744 case KVMPPC_IRQ_MPIC:
745 kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
747 case KVMPPC_IRQ_XICS:
749 kvmppc_xive_cleanup_vcpu(vcpu);
751 kvmppc_xics_free_icp(vcpu);
753 case KVMPPC_IRQ_XIVE:
754 kvmppc_xive_native_cleanup_vcpu(vcpu);
758 kvmppc_core_vcpu_free(vcpu);
761 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
763 kvm_arch_vcpu_free(vcpu);
766 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
768 return kvmppc_core_pending_dec(vcpu);
771 static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
773 struct kvm_vcpu *vcpu;
775 vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
776 kvmppc_decrementer_func(vcpu);
778 return HRTIMER_NORESTART;
781 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
785 hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
786 vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
787 vcpu->arch.dec_expires = get_tb();
789 #ifdef CONFIG_KVM_EXIT_TIMING
790 mutex_init(&vcpu->arch.exit_timing_lock);
792 ret = kvmppc_subarch_vcpu_init(vcpu);
796 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
798 kvmppc_mmu_destroy(vcpu);
799 kvmppc_subarch_vcpu_uninit(vcpu);
802 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
806 * vrsave (formerly usprg0) isn't used by Linux, but may
807 * be used by the guest.
809 * On non-booke this is associated with Altivec and
810 * is handled by code in book3s.c.
812 mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
814 kvmppc_core_vcpu_load(vcpu, cpu);
817 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
819 kvmppc_core_vcpu_put(vcpu);
821 vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
826 * irq_bypass_add_producer and irq_bypass_del_producer are only
827 * useful if the architecture supports PCI passthrough.
828 * irq_bypass_stop and irq_bypass_start are not needed and so
829 * kvm_ops are not defined for them.
831 bool kvm_arch_has_irq_bypass(void)
833 return ((kvmppc_hv_ops && kvmppc_hv_ops->irq_bypass_add_producer) ||
834 (kvmppc_pr_ops && kvmppc_pr_ops->irq_bypass_add_producer));
837 int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
838 struct irq_bypass_producer *prod)
840 struct kvm_kernel_irqfd *irqfd =
841 container_of(cons, struct kvm_kernel_irqfd, consumer);
842 struct kvm *kvm = irqfd->kvm;
844 if (kvm->arch.kvm_ops->irq_bypass_add_producer)
845 return kvm->arch.kvm_ops->irq_bypass_add_producer(cons, prod);
850 void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
851 struct irq_bypass_producer *prod)
853 struct kvm_kernel_irqfd *irqfd =
854 container_of(cons, struct kvm_kernel_irqfd, consumer);
855 struct kvm *kvm = irqfd->kvm;
857 if (kvm->arch.kvm_ops->irq_bypass_del_producer)
858 kvm->arch.kvm_ops->irq_bypass_del_producer(cons, prod);
862 static inline int kvmppc_get_vsr_dword_offset(int index)
866 if ((index != 0) && (index != 1))
878 static inline int kvmppc_get_vsr_word_offset(int index)
882 if ((index > 3) || (index < 0))
893 static inline void kvmppc_set_vsr_dword(struct kvm_vcpu *vcpu,
896 union kvmppc_one_reg val;
897 int offset = kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
898 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
904 val.vval = VCPU_VSX_VR(vcpu, index - 32);
905 val.vsxval[offset] = gpr;
906 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
908 VCPU_VSX_FPR(vcpu, index, offset) = gpr;
912 static inline void kvmppc_set_vsr_dword_dump(struct kvm_vcpu *vcpu,
915 union kvmppc_one_reg val;
916 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
919 val.vval = VCPU_VSX_VR(vcpu, index - 32);
922 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
924 VCPU_VSX_FPR(vcpu, index, 0) = gpr;
925 VCPU_VSX_FPR(vcpu, index, 1) = gpr;
929 static inline void kvmppc_set_vsr_word_dump(struct kvm_vcpu *vcpu,
932 union kvmppc_one_reg val;
933 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
936 val.vsx32val[0] = gpr;
937 val.vsx32val[1] = gpr;
938 val.vsx32val[2] = gpr;
939 val.vsx32val[3] = gpr;
940 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
942 val.vsx32val[0] = gpr;
943 val.vsx32val[1] = gpr;
944 VCPU_VSX_FPR(vcpu, index, 0) = val.vsxval[0];
945 VCPU_VSX_FPR(vcpu, index, 1) = val.vsxval[0];
949 static inline void kvmppc_set_vsr_word(struct kvm_vcpu *vcpu,
952 union kvmppc_one_reg val;
953 int offset = kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
954 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
955 int dword_offset, word_offset;
961 val.vval = VCPU_VSX_VR(vcpu, index - 32);
962 val.vsx32val[offset] = gpr32;
963 VCPU_VSX_VR(vcpu, index - 32) = val.vval;
965 dword_offset = offset / 2;
966 word_offset = offset % 2;
967 val.vsxval[0] = VCPU_VSX_FPR(vcpu, index, dword_offset);
968 val.vsx32val[word_offset] = gpr32;
969 VCPU_VSX_FPR(vcpu, index, dword_offset) = val.vsxval[0];
972 #endif /* CONFIG_VSX */
974 #ifdef CONFIG_ALTIVEC
975 static inline int kvmppc_get_vmx_offset_generic(struct kvm_vcpu *vcpu,
976 int index, int element_size)
979 int elts = sizeof(vector128)/element_size;
981 if ((index < 0) || (index >= elts))
984 if (kvmppc_need_byteswap(vcpu))
985 offset = elts - index - 1;
992 static inline int kvmppc_get_vmx_dword_offset(struct kvm_vcpu *vcpu,
995 return kvmppc_get_vmx_offset_generic(vcpu, index, 8);
998 static inline int kvmppc_get_vmx_word_offset(struct kvm_vcpu *vcpu,
1001 return kvmppc_get_vmx_offset_generic(vcpu, index, 4);
1004 static inline int kvmppc_get_vmx_hword_offset(struct kvm_vcpu *vcpu,
1007 return kvmppc_get_vmx_offset_generic(vcpu, index, 2);
1010 static inline int kvmppc_get_vmx_byte_offset(struct kvm_vcpu *vcpu,
1013 return kvmppc_get_vmx_offset_generic(vcpu, index, 1);
1017 static inline void kvmppc_set_vmx_dword(struct kvm_vcpu *vcpu,
1020 union kvmppc_one_reg val;
1021 int offset = kvmppc_get_vmx_dword_offset(vcpu,
1022 vcpu->arch.mmio_vmx_offset);
1023 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1028 val.vval = VCPU_VSX_VR(vcpu, index);
1029 val.vsxval[offset] = gpr;
1030 VCPU_VSX_VR(vcpu, index) = val.vval;
1033 static inline void kvmppc_set_vmx_word(struct kvm_vcpu *vcpu,
1036 union kvmppc_one_reg val;
1037 int offset = kvmppc_get_vmx_word_offset(vcpu,
1038 vcpu->arch.mmio_vmx_offset);
1039 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1044 val.vval = VCPU_VSX_VR(vcpu, index);
1045 val.vsx32val[offset] = gpr32;
1046 VCPU_VSX_VR(vcpu, index) = val.vval;
1049 static inline void kvmppc_set_vmx_hword(struct kvm_vcpu *vcpu,
1052 union kvmppc_one_reg val;
1053 int offset = kvmppc_get_vmx_hword_offset(vcpu,
1054 vcpu->arch.mmio_vmx_offset);
1055 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1060 val.vval = VCPU_VSX_VR(vcpu, index);
1061 val.vsx16val[offset] = gpr16;
1062 VCPU_VSX_VR(vcpu, index) = val.vval;
1065 static inline void kvmppc_set_vmx_byte(struct kvm_vcpu *vcpu,
1068 union kvmppc_one_reg val;
1069 int offset = kvmppc_get_vmx_byte_offset(vcpu,
1070 vcpu->arch.mmio_vmx_offset);
1071 int index = vcpu->arch.io_gpr & KVM_MMIO_REG_MASK;
1076 val.vval = VCPU_VSX_VR(vcpu, index);
1077 val.vsx8val[offset] = gpr8;
1078 VCPU_VSX_VR(vcpu, index) = val.vval;
1080 #endif /* CONFIG_ALTIVEC */
1082 #ifdef CONFIG_PPC_FPU
1083 static inline u64 sp_to_dp(u32 fprs)
1089 asm ("lfs%U1%X1 0,%1; stfd%U0%X0 0,%0" : "=m" (fprd) : "m" (fprs)
1095 static inline u32 dp_to_sp(u64 fprd)
1101 asm ("lfd%U1%X1 0,%1; stfs%U0%X0 0,%0" : "=m" (fprs) : "m" (fprd)
1108 #define sp_to_dp(x) (x)
1109 #define dp_to_sp(x) (x)
1110 #endif /* CONFIG_PPC_FPU */
1112 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
1113 struct kvm_run *run)
1115 u64 uninitialized_var(gpr);
1117 if (run->mmio.len > sizeof(gpr)) {
1118 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
1122 if (!vcpu->arch.mmio_host_swabbed) {
1123 switch (run->mmio.len) {
1124 case 8: gpr = *(u64 *)run->mmio.data; break;
1125 case 4: gpr = *(u32 *)run->mmio.data; break;
1126 case 2: gpr = *(u16 *)run->mmio.data; break;
1127 case 1: gpr = *(u8 *)run->mmio.data; break;
1130 switch (run->mmio.len) {
1131 case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
1132 case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
1133 case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
1134 case 1: gpr = *(u8 *)run->mmio.data; break;
1138 /* conversion between single and double precision */
1139 if ((vcpu->arch.mmio_sp64_extend) && (run->mmio.len == 4))
1140 gpr = sp_to_dp(gpr);
1142 if (vcpu->arch.mmio_sign_extend) {
1143 switch (run->mmio.len) {
1146 gpr = (s64)(s32)gpr;
1150 gpr = (s64)(s16)gpr;
1158 switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
1159 case KVM_MMIO_REG_GPR:
1160 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
1162 case KVM_MMIO_REG_FPR:
1163 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1164 vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_FP);
1166 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1168 #ifdef CONFIG_PPC_BOOK3S
1169 case KVM_MMIO_REG_QPR:
1170 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1172 case KVM_MMIO_REG_FQPR:
1173 VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
1174 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
1178 case KVM_MMIO_REG_VSX:
1179 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1180 vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VSX);
1182 if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_DWORD)
1183 kvmppc_set_vsr_dword(vcpu, gpr);
1184 else if (vcpu->arch.mmio_copy_type == KVMPPC_VSX_COPY_WORD)
1185 kvmppc_set_vsr_word(vcpu, gpr);
1186 else if (vcpu->arch.mmio_copy_type ==
1187 KVMPPC_VSX_COPY_DWORD_LOAD_DUMP)
1188 kvmppc_set_vsr_dword_dump(vcpu, gpr);
1189 else if (vcpu->arch.mmio_copy_type ==
1190 KVMPPC_VSX_COPY_WORD_LOAD_DUMP)
1191 kvmppc_set_vsr_word_dump(vcpu, gpr);
1194 #ifdef CONFIG_ALTIVEC
1195 case KVM_MMIO_REG_VMX:
1196 if (vcpu->kvm->arch.kvm_ops->giveup_ext)
1197 vcpu->kvm->arch.kvm_ops->giveup_ext(vcpu, MSR_VEC);
1199 if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_DWORD)
1200 kvmppc_set_vmx_dword(vcpu, gpr);
1201 else if (vcpu->arch.mmio_copy_type == KVMPPC_VMX_COPY_WORD)
1202 kvmppc_set_vmx_word(vcpu, gpr);
1203 else if (vcpu->arch.mmio_copy_type ==
1204 KVMPPC_VMX_COPY_HWORD)
1205 kvmppc_set_vmx_hword(vcpu, gpr);
1206 else if (vcpu->arch.mmio_copy_type ==
1207 KVMPPC_VMX_COPY_BYTE)
1208 kvmppc_set_vmx_byte(vcpu, gpr);
1211 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1212 case KVM_MMIO_REG_NESTED_GPR:
1213 if (kvmppc_need_byteswap(vcpu))
1215 kvm_vcpu_write_guest(vcpu, vcpu->arch.nested_io_gpr, &gpr,
1224 static int __kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1225 unsigned int rt, unsigned int bytes,
1226 int is_default_endian, int sign_extend)
1231 /* Pity C doesn't have a logical XOR operator */
1232 if (kvmppc_need_byteswap(vcpu)) {
1233 host_swabbed = is_default_endian;
1235 host_swabbed = !is_default_endian;
1238 if (bytes > sizeof(run->mmio.data)) {
1239 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1243 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1244 run->mmio.len = bytes;
1245 run->mmio.is_write = 0;
1247 vcpu->arch.io_gpr = rt;
1248 vcpu->arch.mmio_host_swabbed = host_swabbed;
1249 vcpu->mmio_needed = 1;
1250 vcpu->mmio_is_write = 0;
1251 vcpu->arch.mmio_sign_extend = sign_extend;
1253 idx = srcu_read_lock(&vcpu->kvm->srcu);
1255 ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1256 bytes, &run->mmio.data);
1258 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1261 kvmppc_complete_mmio_load(vcpu, run);
1262 vcpu->mmio_needed = 0;
1263 return EMULATE_DONE;
1266 return EMULATE_DO_MMIO;
1269 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1270 unsigned int rt, unsigned int bytes,
1271 int is_default_endian)
1273 return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 0);
1275 EXPORT_SYMBOL_GPL(kvmppc_handle_load);
1277 /* Same as above, but sign extends */
1278 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
1279 unsigned int rt, unsigned int bytes,
1280 int is_default_endian)
1282 return __kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian, 1);
1286 int kvmppc_handle_vsx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1287 unsigned int rt, unsigned int bytes,
1288 int is_default_endian, int mmio_sign_extend)
1290 enum emulation_result emulated = EMULATE_DONE;
1292 /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1293 if (vcpu->arch.mmio_vsx_copy_nums > 4)
1294 return EMULATE_FAIL;
1296 while (vcpu->arch.mmio_vsx_copy_nums) {
1297 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1298 is_default_endian, mmio_sign_extend);
1300 if (emulated != EMULATE_DONE)
1303 vcpu->arch.paddr_accessed += run->mmio.len;
1305 vcpu->arch.mmio_vsx_copy_nums--;
1306 vcpu->arch.mmio_vsx_offset++;
1310 #endif /* CONFIG_VSX */
1312 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1313 u64 val, unsigned int bytes, int is_default_endian)
1315 void *data = run->mmio.data;
1319 /* Pity C doesn't have a logical XOR operator */
1320 if (kvmppc_need_byteswap(vcpu)) {
1321 host_swabbed = is_default_endian;
1323 host_swabbed = !is_default_endian;
1326 if (bytes > sizeof(run->mmio.data)) {
1327 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
1331 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
1332 run->mmio.len = bytes;
1333 run->mmio.is_write = 1;
1334 vcpu->mmio_needed = 1;
1335 vcpu->mmio_is_write = 1;
1337 if ((vcpu->arch.mmio_sp64_extend) && (bytes == 4))
1338 val = dp_to_sp(val);
1340 /* Store the value at the lowest bytes in 'data'. */
1341 if (!host_swabbed) {
1343 case 8: *(u64 *)data = val; break;
1344 case 4: *(u32 *)data = val; break;
1345 case 2: *(u16 *)data = val; break;
1346 case 1: *(u8 *)data = val; break;
1350 case 8: *(u64 *)data = swab64(val); break;
1351 case 4: *(u32 *)data = swab32(val); break;
1352 case 2: *(u16 *)data = swab16(val); break;
1353 case 1: *(u8 *)data = val; break;
1357 idx = srcu_read_lock(&vcpu->kvm->srcu);
1359 ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
1360 bytes, &run->mmio.data);
1362 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1365 vcpu->mmio_needed = 0;
1366 return EMULATE_DONE;
1369 return EMULATE_DO_MMIO;
1371 EXPORT_SYMBOL_GPL(kvmppc_handle_store);
1374 static inline int kvmppc_get_vsr_data(struct kvm_vcpu *vcpu, int rs, u64 *val)
1376 u32 dword_offset, word_offset;
1377 union kvmppc_one_reg reg;
1379 int copy_type = vcpu->arch.mmio_copy_type;
1382 switch (copy_type) {
1383 case KVMPPC_VSX_COPY_DWORD:
1385 kvmppc_get_vsr_dword_offset(vcpu->arch.mmio_vsx_offset);
1387 if (vsx_offset == -1) {
1393 *val = VCPU_VSX_FPR(vcpu, rs, vsx_offset);
1395 reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1396 *val = reg.vsxval[vsx_offset];
1400 case KVMPPC_VSX_COPY_WORD:
1402 kvmppc_get_vsr_word_offset(vcpu->arch.mmio_vsx_offset);
1404 if (vsx_offset == -1) {
1410 dword_offset = vsx_offset / 2;
1411 word_offset = vsx_offset % 2;
1412 reg.vsxval[0] = VCPU_VSX_FPR(vcpu, rs, dword_offset);
1413 *val = reg.vsx32val[word_offset];
1415 reg.vval = VCPU_VSX_VR(vcpu, rs - 32);
1416 *val = reg.vsx32val[vsx_offset];
1428 int kvmppc_handle_vsx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1429 int rs, unsigned int bytes, int is_default_endian)
1432 enum emulation_result emulated = EMULATE_DONE;
1434 vcpu->arch.io_gpr = rs;
1436 /* Currently, mmio_vsx_copy_nums only allowed to be 4 or less */
1437 if (vcpu->arch.mmio_vsx_copy_nums > 4)
1438 return EMULATE_FAIL;
1440 while (vcpu->arch.mmio_vsx_copy_nums) {
1441 if (kvmppc_get_vsr_data(vcpu, rs, &val) == -1)
1442 return EMULATE_FAIL;
1444 emulated = kvmppc_handle_store(run, vcpu,
1445 val, bytes, is_default_endian);
1447 if (emulated != EMULATE_DONE)
1450 vcpu->arch.paddr_accessed += run->mmio.len;
1452 vcpu->arch.mmio_vsx_copy_nums--;
1453 vcpu->arch.mmio_vsx_offset++;
1459 static int kvmppc_emulate_mmio_vsx_loadstore(struct kvm_vcpu *vcpu,
1460 struct kvm_run *run)
1462 enum emulation_result emulated = EMULATE_FAIL;
1465 vcpu->arch.paddr_accessed += run->mmio.len;
1467 if (!vcpu->mmio_is_write) {
1468 emulated = kvmppc_handle_vsx_load(run, vcpu, vcpu->arch.io_gpr,
1469 run->mmio.len, 1, vcpu->arch.mmio_sign_extend);
1471 emulated = kvmppc_handle_vsx_store(run, vcpu,
1472 vcpu->arch.io_gpr, run->mmio.len, 1);
1476 case EMULATE_DO_MMIO:
1477 run->exit_reason = KVM_EXIT_MMIO;
1481 pr_info("KVM: MMIO emulation failed (VSX repeat)\n");
1482 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1483 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1492 #endif /* CONFIG_VSX */
1494 #ifdef CONFIG_ALTIVEC
1495 int kvmppc_handle_vmx_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
1496 unsigned int rt, unsigned int bytes, int is_default_endian)
1498 enum emulation_result emulated = EMULATE_DONE;
1500 if (vcpu->arch.mmio_vsx_copy_nums > 2)
1501 return EMULATE_FAIL;
1503 while (vcpu->arch.mmio_vmx_copy_nums) {
1504 emulated = __kvmppc_handle_load(run, vcpu, rt, bytes,
1505 is_default_endian, 0);
1507 if (emulated != EMULATE_DONE)
1510 vcpu->arch.paddr_accessed += run->mmio.len;
1511 vcpu->arch.mmio_vmx_copy_nums--;
1512 vcpu->arch.mmio_vmx_offset++;
1518 int kvmppc_get_vmx_dword(struct kvm_vcpu *vcpu, int index, u64 *val)
1520 union kvmppc_one_reg reg;
1525 kvmppc_get_vmx_dword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1527 if (vmx_offset == -1)
1530 reg.vval = VCPU_VSX_VR(vcpu, index);
1531 *val = reg.vsxval[vmx_offset];
1536 int kvmppc_get_vmx_word(struct kvm_vcpu *vcpu, int index, u64 *val)
1538 union kvmppc_one_reg reg;
1543 kvmppc_get_vmx_word_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1545 if (vmx_offset == -1)
1548 reg.vval = VCPU_VSX_VR(vcpu, index);
1549 *val = reg.vsx32val[vmx_offset];
1554 int kvmppc_get_vmx_hword(struct kvm_vcpu *vcpu, int index, u64 *val)
1556 union kvmppc_one_reg reg;
1561 kvmppc_get_vmx_hword_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1563 if (vmx_offset == -1)
1566 reg.vval = VCPU_VSX_VR(vcpu, index);
1567 *val = reg.vsx16val[vmx_offset];
1572 int kvmppc_get_vmx_byte(struct kvm_vcpu *vcpu, int index, u64 *val)
1574 union kvmppc_one_reg reg;
1579 kvmppc_get_vmx_byte_offset(vcpu, vcpu->arch.mmio_vmx_offset);
1581 if (vmx_offset == -1)
1584 reg.vval = VCPU_VSX_VR(vcpu, index);
1585 *val = reg.vsx8val[vmx_offset];
1590 int kvmppc_handle_vmx_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
1591 unsigned int rs, unsigned int bytes, int is_default_endian)
1594 unsigned int index = rs & KVM_MMIO_REG_MASK;
1595 enum emulation_result emulated = EMULATE_DONE;
1597 if (vcpu->arch.mmio_vsx_copy_nums > 2)
1598 return EMULATE_FAIL;
1600 vcpu->arch.io_gpr = rs;
1602 while (vcpu->arch.mmio_vmx_copy_nums) {
1603 switch (vcpu->arch.mmio_copy_type) {
1604 case KVMPPC_VMX_COPY_DWORD:
1605 if (kvmppc_get_vmx_dword(vcpu, index, &val) == -1)
1606 return EMULATE_FAIL;
1609 case KVMPPC_VMX_COPY_WORD:
1610 if (kvmppc_get_vmx_word(vcpu, index, &val) == -1)
1611 return EMULATE_FAIL;
1613 case KVMPPC_VMX_COPY_HWORD:
1614 if (kvmppc_get_vmx_hword(vcpu, index, &val) == -1)
1615 return EMULATE_FAIL;
1617 case KVMPPC_VMX_COPY_BYTE:
1618 if (kvmppc_get_vmx_byte(vcpu, index, &val) == -1)
1619 return EMULATE_FAIL;
1622 return EMULATE_FAIL;
1625 emulated = kvmppc_handle_store(run, vcpu, val, bytes,
1627 if (emulated != EMULATE_DONE)
1630 vcpu->arch.paddr_accessed += run->mmio.len;
1631 vcpu->arch.mmio_vmx_copy_nums--;
1632 vcpu->arch.mmio_vmx_offset++;
1638 static int kvmppc_emulate_mmio_vmx_loadstore(struct kvm_vcpu *vcpu,
1639 struct kvm_run *run)
1641 enum emulation_result emulated = EMULATE_FAIL;
1644 vcpu->arch.paddr_accessed += run->mmio.len;
1646 if (!vcpu->mmio_is_write) {
1647 emulated = kvmppc_handle_vmx_load(run, vcpu,
1648 vcpu->arch.io_gpr, run->mmio.len, 1);
1650 emulated = kvmppc_handle_vmx_store(run, vcpu,
1651 vcpu->arch.io_gpr, run->mmio.len, 1);
1655 case EMULATE_DO_MMIO:
1656 run->exit_reason = KVM_EXIT_MMIO;
1660 pr_info("KVM: MMIO emulation failed (VMX repeat)\n");
1661 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1662 run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
1671 #endif /* CONFIG_ALTIVEC */
1673 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1676 union kvmppc_one_reg val;
1679 size = one_reg_size(reg->id);
1680 if (size > sizeof(val))
1683 r = kvmppc_get_one_reg(vcpu, reg->id, &val);
1687 #ifdef CONFIG_ALTIVEC
1688 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1689 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1693 val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
1695 case KVM_REG_PPC_VSCR:
1696 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1700 val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
1702 case KVM_REG_PPC_VRSAVE:
1703 val = get_reg_val(reg->id, vcpu->arch.vrsave);
1705 #endif /* CONFIG_ALTIVEC */
1715 if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
1721 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
1724 union kvmppc_one_reg val;
1727 size = one_reg_size(reg->id);
1728 if (size > sizeof(val))
1731 if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
1734 r = kvmppc_set_one_reg(vcpu, reg->id, &val);
1738 #ifdef CONFIG_ALTIVEC
1739 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
1740 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1744 vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
1746 case KVM_REG_PPC_VSCR:
1747 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1751 vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
1753 case KVM_REG_PPC_VRSAVE:
1754 if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
1758 vcpu->arch.vrsave = set_reg_val(reg->id, val);
1760 #endif /* CONFIG_ALTIVEC */
1770 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
1776 if (vcpu->mmio_needed) {
1777 vcpu->mmio_needed = 0;
1778 if (!vcpu->mmio_is_write)
1779 kvmppc_complete_mmio_load(vcpu, run);
1781 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1782 vcpu->arch.mmio_vsx_copy_nums--;
1783 vcpu->arch.mmio_vsx_offset++;
1786 if (vcpu->arch.mmio_vsx_copy_nums > 0) {
1787 r = kvmppc_emulate_mmio_vsx_loadstore(vcpu, run);
1788 if (r == RESUME_HOST) {
1789 vcpu->mmio_needed = 1;
1794 #ifdef CONFIG_ALTIVEC
1795 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1796 vcpu->arch.mmio_vmx_copy_nums--;
1797 vcpu->arch.mmio_vmx_offset++;
1800 if (vcpu->arch.mmio_vmx_copy_nums > 0) {
1801 r = kvmppc_emulate_mmio_vmx_loadstore(vcpu, run);
1802 if (r == RESUME_HOST) {
1803 vcpu->mmio_needed = 1;
1808 } else if (vcpu->arch.osi_needed) {
1809 u64 *gprs = run->osi.gprs;
1812 for (i = 0; i < 32; i++)
1813 kvmppc_set_gpr(vcpu, i, gprs[i]);
1814 vcpu->arch.osi_needed = 0;
1815 } else if (vcpu->arch.hcall_needed) {
1818 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
1819 for (i = 0; i < 9; ++i)
1820 kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
1821 vcpu->arch.hcall_needed = 0;
1823 } else if (vcpu->arch.epr_needed) {
1824 kvmppc_set_epr(vcpu, run->epr.epr);
1825 vcpu->arch.epr_needed = 0;
1829 kvm_sigset_activate(vcpu);
1831 if (run->immediate_exit)
1834 r = kvmppc_vcpu_run(run, vcpu);
1836 kvm_sigset_deactivate(vcpu);
1838 #ifdef CONFIG_ALTIVEC
1845 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
1847 if (irq->irq == KVM_INTERRUPT_UNSET) {
1848 kvmppc_core_dequeue_external(vcpu);
1852 kvmppc_core_queue_external(vcpu, irq);
1854 kvm_vcpu_kick(vcpu);
1859 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
1860 struct kvm_enable_cap *cap)
1868 case KVM_CAP_PPC_OSI:
1870 vcpu->arch.osi_enabled = true;
1872 case KVM_CAP_PPC_PAPR:
1874 vcpu->arch.papr_enabled = true;
1876 case KVM_CAP_PPC_EPR:
1879 vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
1881 vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1884 case KVM_CAP_PPC_BOOKE_WATCHDOG:
1886 vcpu->arch.watchdog_enabled = true;
1889 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
1890 case KVM_CAP_SW_TLB: {
1891 struct kvm_config_tlb cfg;
1892 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
1895 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
1898 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
1902 #ifdef CONFIG_KVM_MPIC
1903 case KVM_CAP_IRQ_MPIC: {
1905 struct kvm_device *dev;
1908 f = fdget(cap->args[0]);
1913 dev = kvm_device_from_filp(f.file);
1915 r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);
1921 #ifdef CONFIG_KVM_XICS
1922 case KVM_CAP_IRQ_XICS: {
1924 struct kvm_device *dev;
1927 f = fdget(cap->args[0]);
1932 dev = kvm_device_from_filp(f.file);
1935 r = kvmppc_xive_connect_vcpu(dev, vcpu, cap->args[1]);
1937 r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);
1943 #endif /* CONFIG_KVM_XICS */
1944 #ifdef CONFIG_KVM_XIVE
1945 case KVM_CAP_PPC_IRQ_XIVE: {
1947 struct kvm_device *dev;
1950 f = fdget(cap->args[0]);
1955 if (!xive_enabled())
1959 dev = kvm_device_from_filp(f.file);
1961 r = kvmppc_xive_native_connect_vcpu(dev, vcpu,
1967 #endif /* CONFIG_KVM_XIVE */
1968 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
1969 case KVM_CAP_PPC_FWNMI:
1971 if (!is_kvmppc_hv_enabled(vcpu->kvm))
1974 vcpu->kvm->arch.fwnmi_enabled = true;
1976 #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */
1983 r = kvmppc_sanity_check(vcpu);
1988 bool kvm_arch_intc_initialized(struct kvm *kvm)
1990 #ifdef CONFIG_KVM_MPIC
1994 #ifdef CONFIG_KVM_XICS
1995 if (kvm->arch.xics || kvm->arch.xive)
2001 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
2002 struct kvm_mp_state *mp_state)
2007 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
2008 struct kvm_mp_state *mp_state)
2013 long kvm_arch_vcpu_async_ioctl(struct file *filp,
2014 unsigned int ioctl, unsigned long arg)
2016 struct kvm_vcpu *vcpu = filp->private_data;
2017 void __user *argp = (void __user *)arg;
2019 if (ioctl == KVM_INTERRUPT) {
2020 struct kvm_interrupt irq;
2021 if (copy_from_user(&irq, argp, sizeof(irq)))
2023 return kvm_vcpu_ioctl_interrupt(vcpu, &irq);
2025 return -ENOIOCTLCMD;
2028 long kvm_arch_vcpu_ioctl(struct file *filp,
2029 unsigned int ioctl, unsigned long arg)
2031 struct kvm_vcpu *vcpu = filp->private_data;
2032 void __user *argp = (void __user *)arg;
2036 case KVM_ENABLE_CAP:
2038 struct kvm_enable_cap cap;
2041 if (copy_from_user(&cap, argp, sizeof(cap)))
2043 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
2048 case KVM_SET_ONE_REG:
2049 case KVM_GET_ONE_REG:
2051 struct kvm_one_reg reg;
2053 if (copy_from_user(®, argp, sizeof(reg)))
2055 if (ioctl == KVM_SET_ONE_REG)
2056 r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®);
2058 r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®);
2062 #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
2063 case KVM_DIRTY_TLB: {
2064 struct kvm_dirty_tlb dirty;
2067 if (copy_from_user(&dirty, argp, sizeof(dirty)))
2069 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
2082 vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
2084 return VM_FAULT_SIGBUS;
2087 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
2089 u32 inst_nop = 0x60000000;
2090 #ifdef CONFIG_KVM_BOOKE_HV
2091 u32 inst_sc1 = 0x44000022;
2092 pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
2093 pvinfo->hcall[1] = cpu_to_be32(inst_nop);
2094 pvinfo->hcall[2] = cpu_to_be32(inst_nop);
2095 pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2097 u32 inst_lis = 0x3c000000;
2098 u32 inst_ori = 0x60000000;
2099 u32 inst_sc = 0x44000002;
2100 u32 inst_imm_mask = 0xffff;
2103 * The hypercall to get into KVM from within guest context is as
2106 * lis r0, r0, KVM_SC_MAGIC_R0@h
2107 * ori r0, KVM_SC_MAGIC_R0@l
2111 pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
2112 pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
2113 pvinfo->hcall[2] = cpu_to_be32(inst_sc);
2114 pvinfo->hcall[3] = cpu_to_be32(inst_nop);
2117 pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;
2122 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
2125 if (!irqchip_in_kernel(kvm))
2128 irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
2129 irq_event->irq, irq_event->level,
2135 int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
2136 struct kvm_enable_cap *cap)
2144 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
2145 case KVM_CAP_PPC_ENABLE_HCALL: {
2146 unsigned long hcall = cap->args[0];
2149 if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
2152 if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
2155 set_bit(hcall / 4, kvm->arch.enabled_hcalls);
2157 clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
2161 case KVM_CAP_PPC_SMT: {
2162 unsigned long mode = cap->args[0];
2163 unsigned long flags = cap->args[1];
2166 if (kvm->arch.kvm_ops->set_smt_mode)
2167 r = kvm->arch.kvm_ops->set_smt_mode(kvm, mode, flags);
2171 case KVM_CAP_PPC_NESTED_HV:
2173 if (!is_kvmppc_hv_enabled(kvm) ||
2174 !kvm->arch.kvm_ops->enable_nested)
2176 r = kvm->arch.kvm_ops->enable_nested(kvm);
2187 #ifdef CONFIG_PPC_BOOK3S_64
2189 * These functions check whether the underlying hardware is safe
2190 * against attacks based on observing the effects of speculatively
2191 * executed instructions, and whether it supplies instructions for
2192 * use in workarounds. The information comes from firmware, either
2193 * via the device tree on powernv platforms or from an hcall on
2194 * pseries platforms.
2196 #ifdef CONFIG_PPC_PSERIES
2197 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2199 struct h_cpu_char_result c;
2202 if (!machine_is(pseries))
2205 rc = plpar_get_cpu_characteristics(&c);
2206 if (rc == H_SUCCESS) {
2207 cp->character = c.character;
2208 cp->behaviour = c.behaviour;
2209 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2210 KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2211 KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2212 KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2213 KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2214 KVM_PPC_CPU_CHAR_BR_HINT_HONOURED |
2215 KVM_PPC_CPU_CHAR_MTTRIG_THR_RECONF |
2216 KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2217 KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2218 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2219 KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2220 KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2221 KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2226 static int pseries_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2232 static inline bool have_fw_feat(struct device_node *fw_features,
2233 const char *state, const char *name)
2235 struct device_node *np;
2238 np = of_get_child_by_name(fw_features, name);
2240 r = of_property_read_bool(np, state);
2246 static int kvmppc_get_cpu_char(struct kvm_ppc_cpu_char *cp)
2248 struct device_node *np, *fw_features;
2251 memset(cp, 0, sizeof(*cp));
2252 r = pseries_get_cpu_char(cp);
2256 np = of_find_node_by_name(NULL, "ibm,opal");
2258 fw_features = of_get_child_by_name(np, "fw-features");
2262 if (have_fw_feat(fw_features, "enabled",
2263 "inst-spec-barrier-ori31,31,0"))
2264 cp->character |= KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31;
2265 if (have_fw_feat(fw_features, "enabled",
2266 "fw-bcctrl-serialized"))
2267 cp->character |= KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED;
2268 if (have_fw_feat(fw_features, "enabled",
2269 "inst-l1d-flush-ori30,30,0"))
2270 cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30;
2271 if (have_fw_feat(fw_features, "enabled",
2272 "inst-l1d-flush-trig2"))
2273 cp->character |= KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2;
2274 if (have_fw_feat(fw_features, "enabled",
2275 "fw-l1d-thread-split"))
2276 cp->character |= KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV;
2277 if (have_fw_feat(fw_features, "enabled",
2278 "fw-count-cache-disabled"))
2279 cp->character |= KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS;
2280 if (have_fw_feat(fw_features, "enabled",
2281 "fw-count-cache-flush-bcctr2,0,0"))
2282 cp->character |= KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2283 cp->character_mask = KVM_PPC_CPU_CHAR_SPEC_BAR_ORI31 |
2284 KVM_PPC_CPU_CHAR_BCCTRL_SERIALISED |
2285 KVM_PPC_CPU_CHAR_L1D_FLUSH_ORI30 |
2286 KVM_PPC_CPU_CHAR_L1D_FLUSH_TRIG2 |
2287 KVM_PPC_CPU_CHAR_L1D_THREAD_PRIV |
2288 KVM_PPC_CPU_CHAR_COUNT_CACHE_DIS |
2289 KVM_PPC_CPU_CHAR_BCCTR_FLUSH_ASSIST;
2291 if (have_fw_feat(fw_features, "enabled",
2292 "speculation-policy-favor-security"))
2293 cp->behaviour |= KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY;
2294 if (!have_fw_feat(fw_features, "disabled",
2295 "needs-l1d-flush-msr-pr-0-to-1"))
2296 cp->behaviour |= KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR;
2297 if (!have_fw_feat(fw_features, "disabled",
2298 "needs-spec-barrier-for-bound-checks"))
2299 cp->behaviour |= KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR;
2300 if (have_fw_feat(fw_features, "enabled",
2301 "needs-count-cache-flush-on-context-switch"))
2302 cp->behaviour |= KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2303 cp->behaviour_mask = KVM_PPC_CPU_BEHAV_FAVOUR_SECURITY |
2304 KVM_PPC_CPU_BEHAV_L1D_FLUSH_PR |
2305 KVM_PPC_CPU_BEHAV_BNDS_CHK_SPEC_BAR |
2306 KVM_PPC_CPU_BEHAV_FLUSH_COUNT_CACHE;
2308 of_node_put(fw_features);
2315 long kvm_arch_vm_ioctl(struct file *filp,
2316 unsigned int ioctl, unsigned long arg)
2318 struct kvm *kvm __maybe_unused = filp->private_data;
2319 void __user *argp = (void __user *)arg;
2323 case KVM_PPC_GET_PVINFO: {
2324 struct kvm_ppc_pvinfo pvinfo;
2325 memset(&pvinfo, 0, sizeof(pvinfo));
2326 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
2327 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
2334 #ifdef CONFIG_SPAPR_TCE_IOMMU
2335 case KVM_CREATE_SPAPR_TCE_64: {
2336 struct kvm_create_spapr_tce_64 create_tce_64;
2339 if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
2341 if (create_tce_64.flags) {
2345 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2348 case KVM_CREATE_SPAPR_TCE: {
2349 struct kvm_create_spapr_tce create_tce;
2350 struct kvm_create_spapr_tce_64 create_tce_64;
2353 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
2356 create_tce_64.liobn = create_tce.liobn;
2357 create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
2358 create_tce_64.offset = 0;
2359 create_tce_64.size = create_tce.window_size >>
2360 IOMMU_PAGE_SHIFT_4K;
2361 create_tce_64.flags = 0;
2362 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
2366 #ifdef CONFIG_PPC_BOOK3S_64
2367 case KVM_PPC_GET_SMMU_INFO: {
2368 struct kvm_ppc_smmu_info info;
2369 struct kvm *kvm = filp->private_data;
2371 memset(&info, 0, sizeof(info));
2372 r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
2373 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2377 case KVM_PPC_RTAS_DEFINE_TOKEN: {
2378 struct kvm *kvm = filp->private_data;
2380 r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
2383 case KVM_PPC_CONFIGURE_V3_MMU: {
2384 struct kvm *kvm = filp->private_data;
2385 struct kvm_ppc_mmuv3_cfg cfg;
2388 if (!kvm->arch.kvm_ops->configure_mmu)
2391 if (copy_from_user(&cfg, argp, sizeof(cfg)))
2393 r = kvm->arch.kvm_ops->configure_mmu(kvm, &cfg);
2396 case KVM_PPC_GET_RMMU_INFO: {
2397 struct kvm *kvm = filp->private_data;
2398 struct kvm_ppc_rmmu_info info;
2401 if (!kvm->arch.kvm_ops->get_rmmu_info)
2403 r = kvm->arch.kvm_ops->get_rmmu_info(kvm, &info);
2404 if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
2408 case KVM_PPC_GET_CPU_CHAR: {
2409 struct kvm_ppc_cpu_char cpuchar;
2411 r = kvmppc_get_cpu_char(&cpuchar);
2412 if (r >= 0 && copy_to_user(argp, &cpuchar, sizeof(cpuchar)))
2417 struct kvm *kvm = filp->private_data;
2418 r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
2420 #else /* CONFIG_PPC_BOOK3S_64 */
2429 static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
2430 static unsigned long nr_lpids;
2432 long kvmppc_alloc_lpid(void)
2437 lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
2438 if (lpid >= nr_lpids) {
2439 pr_err("%s: No LPIDs free\n", __func__);
2442 } while (test_and_set_bit(lpid, lpid_inuse));
2446 EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
2448 void kvmppc_claim_lpid(long lpid)
2450 set_bit(lpid, lpid_inuse);
2452 EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
2454 void kvmppc_free_lpid(long lpid)
2456 clear_bit(lpid, lpid_inuse);
2458 EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
2460 void kvmppc_init_lpid(unsigned long nr_lpids_param)
2462 nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
2463 memset(lpid_inuse, 0, sizeof(lpid_inuse));
2465 EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
2467 int kvm_arch_init(void *opaque)
2472 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);