2 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
3 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2, as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
19 #include <linux/cpu.h>
20 #include <linux/errno.h>
21 #include <linux/err.h>
22 #include <linux/kvm_host.h>
23 #include <linux/module.h>
24 #include <linux/vmalloc.h>
26 #include <linux/mman.h>
27 #include <linux/sched.h>
28 #include <linux/kvm.h>
29 #include <trace/events/kvm.h>
31 #define CREATE_TRACE_POINTS
34 #include <asm/uaccess.h>
35 #include <asm/ptrace.h>
37 #include <asm/tlbflush.h>
38 #include <asm/cacheflush.h>
40 #include <asm/kvm_arm.h>
41 #include <asm/kvm_asm.h>
42 #include <asm/kvm_mmu.h>
43 #include <asm/kvm_emulate.h>
44 #include <asm/kvm_coproc.h>
45 #include <asm/kvm_psci.h>
48 __asm__(".arch_extension virt");
51 static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page);
52 static kvm_cpu_context_t __percpu *kvm_host_cpu_state;
53 static unsigned long hyp_default_vectors;
55 /* Per-CPU variable containing the currently running vcpu. */
56 static DEFINE_PER_CPU(struct kvm_vcpu *, kvm_arm_running_vcpu);
58 /* The VMID used in the VTTBR */
59 static atomic64_t kvm_vmid_gen = ATOMIC64_INIT(1);
60 static u8 kvm_next_vmid;
61 static DEFINE_SPINLOCK(kvm_vmid_lock);
63 static bool vgic_present;
65 static void kvm_arm_set_running_vcpu(struct kvm_vcpu *vcpu)
67 BUG_ON(preemptible());
68 __get_cpu_var(kvm_arm_running_vcpu) = vcpu;
72 * kvm_arm_get_running_vcpu - get the vcpu running on the current CPU.
73 * Must be called from non-preemptible context
75 struct kvm_vcpu *kvm_arm_get_running_vcpu(void)
77 BUG_ON(preemptible());
78 return __get_cpu_var(kvm_arm_running_vcpu);
82 * kvm_arm_get_running_vcpus - get the per-CPU array of currently running vcpus.
84 struct kvm_vcpu __percpu **kvm_get_running_vcpus(void)
86 return &kvm_arm_running_vcpu;
89 int kvm_arch_hardware_enable(void *garbage)
94 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
96 return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE;
99 void kvm_arch_hardware_disable(void *garbage)
103 int kvm_arch_hardware_setup(void)
108 void kvm_arch_hardware_unsetup(void)
112 void kvm_arch_check_processor_compat(void *rtn)
117 void kvm_arch_sync_events(struct kvm *kvm)
122 * kvm_arch_init_vm - initializes a VM data structure
123 * @kvm: pointer to the KVM struct
125 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
132 ret = kvm_alloc_stage2_pgd(kvm);
136 ret = create_hyp_mappings(kvm, kvm + 1);
138 goto out_free_stage2_pgd;
140 /* Mark the initial VMID generation invalid */
141 kvm->arch.vmid_gen = 0;
145 kvm_free_stage2_pgd(kvm);
150 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
152 return VM_FAULT_SIGBUS;
155 void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
156 struct kvm_memory_slot *dont)
160 int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
161 unsigned long npages)
167 * kvm_arch_destroy_vm - destroy the VM data structure
168 * @kvm: pointer to the KVM struct
170 void kvm_arch_destroy_vm(struct kvm *kvm)
174 kvm_free_stage2_pgd(kvm);
176 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
178 kvm_arch_vcpu_free(kvm->vcpus[i]);
179 kvm->vcpus[i] = NULL;
184 int kvm_dev_ioctl_check_extension(long ext)
188 case KVM_CAP_IRQCHIP:
191 case KVM_CAP_USER_MEMORY:
192 case KVM_CAP_SYNC_MMU:
193 case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
194 case KVM_CAP_ONE_REG:
195 case KVM_CAP_ARM_PSCI:
198 case KVM_CAP_COALESCED_MMIO:
199 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
201 case KVM_CAP_ARM_SET_DEVICE_ADDR:
204 case KVM_CAP_NR_VCPUS:
205 r = num_online_cpus();
207 case KVM_CAP_MAX_VCPUS:
211 r = kvm_arch_dev_ioctl_check_extension(ext);
217 long kvm_arch_dev_ioctl(struct file *filp,
218 unsigned int ioctl, unsigned long arg)
223 void kvm_arch_memslots_updated(struct kvm *kvm)
227 int kvm_arch_prepare_memory_region(struct kvm *kvm,
228 struct kvm_memory_slot *memslot,
229 struct kvm_userspace_memory_region *mem,
230 enum kvm_mr_change change)
235 void kvm_arch_commit_memory_region(struct kvm *kvm,
236 struct kvm_userspace_memory_region *mem,
237 const struct kvm_memory_slot *old,
238 enum kvm_mr_change change)
242 void kvm_arch_flush_shadow_all(struct kvm *kvm)
246 void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
247 struct kvm_memory_slot *slot)
251 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
254 struct kvm_vcpu *vcpu;
256 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
262 err = kvm_vcpu_init(vcpu, kvm, id);
266 err = create_hyp_mappings(vcpu, vcpu + 1);
272 kvm_vcpu_uninit(vcpu);
274 kmem_cache_free(kvm_vcpu_cache, vcpu);
279 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
284 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
286 kvm_mmu_free_memory_caches(vcpu);
287 kvm_timer_vcpu_terminate(vcpu);
288 kmem_cache_free(kvm_vcpu_cache, vcpu);
291 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
293 kvm_arch_vcpu_free(vcpu);
296 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
301 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
305 /* Force users to call KVM_ARM_VCPU_INIT */
306 vcpu->arch.target = -1;
309 ret = kvm_vgic_vcpu_init(vcpu);
313 /* Set up the timer */
314 kvm_timer_vcpu_init(vcpu);
319 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
323 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
326 vcpu->arch.host_cpu_context = this_cpu_ptr(kvm_host_cpu_state);
329 * Check whether this vcpu requires the cache to be flushed on
330 * this physical CPU. This is a consequence of doing dcache
331 * operations by set/way on this vcpu. We do it here to be in
332 * a non-preemptible section.
334 if (cpumask_test_and_clear_cpu(cpu, &vcpu->arch.require_dcache_flush))
335 flush_cache_all(); /* We'd really want v7_flush_dcache_all() */
337 kvm_arm_set_running_vcpu(vcpu);
340 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
342 kvm_arm_set_running_vcpu(NULL);
345 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
346 struct kvm_guest_debug *dbg)
352 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
353 struct kvm_mp_state *mp_state)
358 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
359 struct kvm_mp_state *mp_state)
365 * kvm_arch_vcpu_runnable - determine if the vcpu can be scheduled
366 * @v: The VCPU pointer
368 * If the guest CPU is not waiting for interrupts or an interrupt line is
369 * asserted, the CPU is by definition runnable.
371 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
373 return !!v->arch.irq_lines || kvm_vgic_vcpu_pending_irq(v);
376 /* Just ensure a guest exit from a particular CPU */
377 static void exit_vm_noop(void *info)
381 void force_vm_exit(const cpumask_t *mask)
383 smp_call_function_many(mask, exit_vm_noop, NULL, true);
387 * need_new_vmid_gen - check that the VMID is still valid
388 * @kvm: The VM's VMID to checkt
390 * return true if there is a new generation of VMIDs being used
392 * The hardware supports only 256 values with the value zero reserved for the
393 * host, so we check if an assigned value belongs to a previous generation,
394 * which which requires us to assign a new value. If we're the first to use a
395 * VMID for the new generation, we must flush necessary caches and TLBs on all
398 static bool need_new_vmid_gen(struct kvm *kvm)
400 return unlikely(kvm->arch.vmid_gen != atomic64_read(&kvm_vmid_gen));
404 * update_vttbr - Update the VTTBR with a valid VMID before the guest runs
405 * @kvm The guest that we are about to run
407 * Called from kvm_arch_vcpu_ioctl_run before entering the guest to ensure the
408 * VM has a valid VMID, otherwise assigns a new one and flushes corresponding
411 static void update_vttbr(struct kvm *kvm)
413 phys_addr_t pgd_phys;
416 if (!need_new_vmid_gen(kvm))
419 spin_lock(&kvm_vmid_lock);
422 * We need to re-check the vmid_gen here to ensure that if another vcpu
423 * already allocated a valid vmid for this vm, then this vcpu should
426 if (!need_new_vmid_gen(kvm)) {
427 spin_unlock(&kvm_vmid_lock);
431 /* First user of a new VMID generation? */
432 if (unlikely(kvm_next_vmid == 0)) {
433 atomic64_inc(&kvm_vmid_gen);
437 * On SMP we know no other CPUs can use this CPU's or each
438 * other's VMID after force_vm_exit returns since the
439 * kvm_vmid_lock blocks them from reentry to the guest.
441 force_vm_exit(cpu_all_mask);
443 * Now broadcast TLB + ICACHE invalidation over the inner
444 * shareable domain to make sure all data structures are
447 kvm_call_hyp(__kvm_flush_vm_context);
450 kvm->arch.vmid_gen = atomic64_read(&kvm_vmid_gen);
451 kvm->arch.vmid = kvm_next_vmid;
454 /* update vttbr to be used with the new vmid */
455 pgd_phys = virt_to_phys(kvm->arch.pgd);
456 vmid = ((u64)(kvm->arch.vmid) << VTTBR_VMID_SHIFT) & VTTBR_VMID_MASK;
457 kvm->arch.vttbr = pgd_phys & VTTBR_BADDR_MASK;
458 kvm->arch.vttbr |= vmid;
460 spin_unlock(&kvm_vmid_lock);
463 static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
465 if (likely(vcpu->arch.has_run_once))
468 vcpu->arch.has_run_once = true;
471 * Initialize the VGIC before running a vcpu the first time on
474 if (irqchip_in_kernel(vcpu->kvm) &&
475 unlikely(!vgic_initialized(vcpu->kvm))) {
476 int ret = kvm_vgic_init(vcpu->kvm);
482 * Handle the "start in power-off" case by calling into the
485 if (test_and_clear_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features)) {
486 *vcpu_reg(vcpu, 0) = KVM_PSCI_FN_CPU_OFF;
493 static void vcpu_pause(struct kvm_vcpu *vcpu)
495 wait_queue_head_t *wq = kvm_arch_vcpu_wq(vcpu);
497 wait_event_interruptible(*wq, !vcpu->arch.pause);
500 static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu)
502 return vcpu->arch.target >= 0;
506 * kvm_arch_vcpu_ioctl_run - the main VCPU run function to execute guest code
507 * @vcpu: The VCPU pointer
508 * @run: The kvm_run structure pointer used for userspace state exchange
510 * This function is called through the VCPU_RUN ioctl called from user space. It
511 * will execute VM code in a loop until the time slice for the process is used
512 * or some emulation is needed from user space in which case the function will
513 * return with return value 0 and with the kvm_run structure filled in with the
514 * required data for the requested emulation.
516 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
521 if (unlikely(!kvm_vcpu_initialized(vcpu)))
524 ret = kvm_vcpu_first_run_init(vcpu);
528 if (run->exit_reason == KVM_EXIT_MMIO) {
529 ret = kvm_handle_mmio_return(vcpu, vcpu->run);
534 if (vcpu->sigset_active)
535 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
538 run->exit_reason = KVM_EXIT_UNKNOWN;
541 * Check conditions before entering the guest
545 update_vttbr(vcpu->kvm);
547 if (vcpu->arch.pause)
550 kvm_vgic_flush_hwstate(vcpu);
551 kvm_timer_flush_hwstate(vcpu);
556 * Re-check atomic conditions
558 if (signal_pending(current)) {
560 run->exit_reason = KVM_EXIT_INTR;
563 if (ret <= 0 || need_new_vmid_gen(vcpu->kvm)) {
565 kvm_timer_sync_hwstate(vcpu);
566 kvm_vgic_sync_hwstate(vcpu);
570 /**************************************************************
573 trace_kvm_entry(*vcpu_pc(vcpu));
575 vcpu->mode = IN_GUEST_MODE;
577 ret = kvm_call_hyp(__kvm_vcpu_run, vcpu);
579 vcpu->mode = OUTSIDE_GUEST_MODE;
580 vcpu->arch.last_pcpu = smp_processor_id();
582 trace_kvm_exit(*vcpu_pc(vcpu));
584 * We may have taken a host interrupt in HYP mode (ie
585 * while executing the guest). This interrupt is still
586 * pending, as we haven't serviced it yet!
588 * We're now back in SVC mode, with interrupts
589 * disabled. Enabling the interrupts now will have
590 * the effect of taking the interrupt again, in SVC
597 *************************************************************/
599 kvm_timer_sync_hwstate(vcpu);
600 kvm_vgic_sync_hwstate(vcpu);
602 ret = handle_exit(vcpu, run, ret);
605 if (vcpu->sigset_active)
606 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
610 static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level)
616 if (number == KVM_ARM_IRQ_CPU_IRQ)
617 bit_index = __ffs(HCR_VI);
618 else /* KVM_ARM_IRQ_CPU_FIQ */
619 bit_index = __ffs(HCR_VF);
621 ptr = (unsigned long *)&vcpu->arch.irq_lines;
623 set = test_and_set_bit(bit_index, ptr);
625 set = test_and_clear_bit(bit_index, ptr);
628 * If we didn't change anything, no need to wake up or kick other CPUs
634 * The vcpu irq_lines field was updated, wake up sleeping VCPUs and
635 * trigger a world-switch round on the running physical CPU to set the
636 * virtual IRQ/FIQ fields in the HCR appropriately.
643 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
646 u32 irq = irq_level->irq;
647 unsigned int irq_type, vcpu_idx, irq_num;
648 int nrcpus = atomic_read(&kvm->online_vcpus);
649 struct kvm_vcpu *vcpu = NULL;
650 bool level = irq_level->level;
652 irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK;
653 vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK;
654 irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK;
656 trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level);
659 case KVM_ARM_IRQ_TYPE_CPU:
660 if (irqchip_in_kernel(kvm))
663 if (vcpu_idx >= nrcpus)
666 vcpu = kvm_get_vcpu(kvm, vcpu_idx);
670 if (irq_num > KVM_ARM_IRQ_CPU_FIQ)
673 return vcpu_interrupt_line(vcpu, irq_num, level);
674 case KVM_ARM_IRQ_TYPE_PPI:
675 if (!irqchip_in_kernel(kvm))
678 if (vcpu_idx >= nrcpus)
681 vcpu = kvm_get_vcpu(kvm, vcpu_idx);
685 if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS)
688 return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level);
689 case KVM_ARM_IRQ_TYPE_SPI:
690 if (!irqchip_in_kernel(kvm))
693 if (irq_num < VGIC_NR_PRIVATE_IRQS ||
694 irq_num > KVM_ARM_IRQ_GIC_MAX)
697 return kvm_vgic_inject_irq(kvm, 0, irq_num, level);
703 long kvm_arch_vcpu_ioctl(struct file *filp,
704 unsigned int ioctl, unsigned long arg)
706 struct kvm_vcpu *vcpu = filp->private_data;
707 void __user *argp = (void __user *)arg;
710 case KVM_ARM_VCPU_INIT: {
711 struct kvm_vcpu_init init;
713 if (copy_from_user(&init, argp, sizeof(init)))
716 return kvm_vcpu_set_target(vcpu, &init);
719 case KVM_SET_ONE_REG:
720 case KVM_GET_ONE_REG: {
721 struct kvm_one_reg reg;
723 if (unlikely(!kvm_vcpu_initialized(vcpu)))
726 if (copy_from_user(®, argp, sizeof(reg)))
728 if (ioctl == KVM_SET_ONE_REG)
729 return kvm_arm_set_reg(vcpu, ®);
731 return kvm_arm_get_reg(vcpu, ®);
733 case KVM_GET_REG_LIST: {
734 struct kvm_reg_list __user *user_list = argp;
735 struct kvm_reg_list reg_list;
738 if (unlikely(!kvm_vcpu_initialized(vcpu)))
741 if (copy_from_user(®_list, user_list, sizeof(reg_list)))
744 reg_list.n = kvm_arm_num_regs(vcpu);
745 if (copy_to_user(user_list, ®_list, sizeof(reg_list)))
749 return kvm_arm_copy_reg_indices(vcpu, user_list->reg);
756 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
761 static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm,
762 struct kvm_arm_device_addr *dev_addr)
764 unsigned long dev_id, type;
766 dev_id = (dev_addr->id & KVM_ARM_DEVICE_ID_MASK) >>
767 KVM_ARM_DEVICE_ID_SHIFT;
768 type = (dev_addr->id & KVM_ARM_DEVICE_TYPE_MASK) >>
769 KVM_ARM_DEVICE_TYPE_SHIFT;
772 case KVM_ARM_DEVICE_VGIC_V2:
775 return kvm_vgic_set_addr(kvm, type, dev_addr->addr);
781 long kvm_arch_vm_ioctl(struct file *filp,
782 unsigned int ioctl, unsigned long arg)
784 struct kvm *kvm = filp->private_data;
785 void __user *argp = (void __user *)arg;
788 case KVM_CREATE_IRQCHIP: {
790 return kvm_vgic_create(kvm);
794 case KVM_ARM_SET_DEVICE_ADDR: {
795 struct kvm_arm_device_addr dev_addr;
797 if (copy_from_user(&dev_addr, argp, sizeof(dev_addr)))
799 return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr);
801 case KVM_ARM_PREFERRED_TARGET: {
803 struct kvm_vcpu_init init;
805 err = kvm_vcpu_preferred_target(&init);
809 if (copy_to_user(argp, &init, sizeof(init)))
819 static void cpu_init_hyp_mode(void *dummy)
821 phys_addr_t boot_pgd_ptr;
823 unsigned long hyp_stack_ptr;
824 unsigned long stack_page;
825 unsigned long vector_ptr;
827 /* Switch from the HYP stub to our own HYP init vector */
828 __hyp_set_vectors(kvm_get_idmap_vector());
830 boot_pgd_ptr = kvm_mmu_get_boot_httbr();
831 pgd_ptr = kvm_mmu_get_httbr();
832 stack_page = __get_cpu_var(kvm_arm_hyp_stack_page);
833 hyp_stack_ptr = stack_page + PAGE_SIZE;
834 vector_ptr = (unsigned long)__kvm_hyp_vector;
836 __cpu_init_hyp_mode(boot_pgd_ptr, pgd_ptr, hyp_stack_ptr, vector_ptr);
839 static int hyp_init_cpu_notify(struct notifier_block *self,
840 unsigned long action, void *cpu)
844 case CPU_STARTING_FROZEN:
845 cpu_init_hyp_mode(NULL);
852 static struct notifier_block hyp_init_cpu_nb = {
853 .notifier_call = hyp_init_cpu_notify,
857 * Inits Hyp-mode on all online CPUs
859 static int init_hyp_mode(void)
865 * Allocate Hyp PGD and setup Hyp identity mapping
867 err = kvm_mmu_init();
872 * It is probably enough to obtain the default on one
873 * CPU. It's unlikely to be different on the others.
875 hyp_default_vectors = __hyp_get_vectors();
878 * Allocate stack pages for Hypervisor-mode
880 for_each_possible_cpu(cpu) {
881 unsigned long stack_page;
883 stack_page = __get_free_page(GFP_KERNEL);
886 goto out_free_stack_pages;
889 per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page;
893 * Map the Hyp-code called directly from the host
895 err = create_hyp_mappings(__kvm_hyp_code_start, __kvm_hyp_code_end);
897 kvm_err("Cannot map world-switch code\n");
898 goto out_free_mappings;
902 * Map the Hyp stack pages
904 for_each_possible_cpu(cpu) {
905 char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu);
906 err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE);
909 kvm_err("Cannot map hyp stack\n");
910 goto out_free_mappings;
915 * Map the host CPU structures
917 kvm_host_cpu_state = alloc_percpu(kvm_cpu_context_t);
918 if (!kvm_host_cpu_state) {
920 kvm_err("Cannot allocate host CPU state\n");
921 goto out_free_mappings;
924 for_each_possible_cpu(cpu) {
925 kvm_cpu_context_t *cpu_ctxt;
927 cpu_ctxt = per_cpu_ptr(kvm_host_cpu_state, cpu);
928 err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1);
931 kvm_err("Cannot map host CPU state: %d\n", err);
932 goto out_free_context;
937 * Execute the init code on each CPU.
939 on_each_cpu(cpu_init_hyp_mode, NULL, 1);
942 * Init HYP view of VGIC
944 err = kvm_vgic_hyp_init();
946 goto out_free_context;
948 #ifdef CONFIG_KVM_ARM_VGIC
953 * Init HYP architected timer support
955 err = kvm_timer_hyp_init();
957 goto out_free_mappings;
959 #ifndef CONFIG_HOTPLUG_CPU
965 kvm_info("Hyp mode initialized successfully\n");
969 free_percpu(kvm_host_cpu_state);
972 out_free_stack_pages:
973 for_each_possible_cpu(cpu)
974 free_page(per_cpu(kvm_arm_hyp_stack_page, cpu));
976 kvm_err("error initializing Hyp mode: %d\n", err);
980 static void check_kvm_target_cpu(void *ret)
982 *(int *)ret = kvm_target_cpu();
986 * Initialize Hyp-mode and memory mappings on all CPUs.
988 int kvm_arch_init(void *opaque)
993 if (!is_hyp_mode_available()) {
994 kvm_err("HYP mode not available\n");
998 for_each_online_cpu(cpu) {
999 smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1);
1001 kvm_err("Error, CPU %d not supported!\n", cpu);
1006 err = init_hyp_mode();
1010 err = register_cpu_notifier(&hyp_init_cpu_nb);
1012 kvm_err("Cannot register HYP init CPU notifier (%d)\n", err);
1016 kvm_coproc_table_init();
1022 /* NOP: Compiling as a module not supported */
1023 void kvm_arch_exit(void)
1025 kvm_perf_teardown();
1028 static int arm_init(void)
1030 int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
1034 module_init(arm_init);