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/cpu_pm.h>
21 #include <linux/errno.h>
22 #include <linux/err.h>
23 #include <linux/kvm_host.h>
24 #include <linux/module.h>
25 #include <linux/vmalloc.h>
27 #include <linux/mman.h>
28 #include <linux/sched.h>
29 #include <linux/kvm.h>
30 #include <trace/events/kvm.h>
32 #define CREATE_TRACE_POINTS
35 #include <asm/uaccess.h>
36 #include <asm/ptrace.h>
38 #include <asm/tlbflush.h>
39 #include <asm/cacheflush.h>
41 #include <asm/kvm_arm.h>
42 #include <asm/kvm_asm.h>
43 #include <asm/kvm_mmu.h>
44 #include <asm/kvm_emulate.h>
45 #include <asm/kvm_coproc.h>
46 #include <asm/kvm_psci.h>
49 __asm__(".arch_extension virt");
52 static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page);
53 static kvm_cpu_context_t __percpu *kvm_host_cpu_state;
54 static unsigned long hyp_default_vectors;
56 /* Per-CPU variable containing the currently running vcpu. */
57 static DEFINE_PER_CPU(struct kvm_vcpu *, kvm_arm_running_vcpu);
59 /* The VMID used in the VTTBR */
60 static atomic64_t kvm_vmid_gen = ATOMIC64_INIT(1);
61 static u8 kvm_next_vmid;
62 static DEFINE_SPINLOCK(kvm_vmid_lock);
64 static bool vgic_present;
66 static void kvm_arm_set_running_vcpu(struct kvm_vcpu *vcpu)
68 BUG_ON(preemptible());
69 __this_cpu_write(kvm_arm_running_vcpu, vcpu);
73 * kvm_arm_get_running_vcpu - get the vcpu running on the current CPU.
74 * Must be called from non-preemptible context
76 struct kvm_vcpu *kvm_arm_get_running_vcpu(void)
78 BUG_ON(preemptible());
79 return __this_cpu_read(kvm_arm_running_vcpu);
83 * kvm_arm_get_running_vcpus - get the per-CPU array of currently running vcpus.
85 struct kvm_vcpu __percpu **kvm_get_running_vcpus(void)
87 return &kvm_arm_running_vcpu;
90 int kvm_arch_hardware_enable(void *garbage)
95 int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
97 return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE;
100 int kvm_arch_hardware_setup(void)
105 void kvm_arch_check_processor_compat(void *rtn)
112 * kvm_arch_init_vm - initializes a VM data structure
113 * @kvm: pointer to the KVM struct
115 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
122 ret = kvm_alloc_stage2_pgd(kvm);
126 ret = create_hyp_mappings(kvm, kvm + 1);
128 goto out_free_stage2_pgd;
132 /* Mark the initial VMID generation invalid */
133 kvm->arch.vmid_gen = 0;
137 kvm_free_stage2_pgd(kvm);
142 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
144 return VM_FAULT_SIGBUS;
149 * kvm_arch_destroy_vm - destroy the VM data structure
150 * @kvm: pointer to the KVM struct
152 void kvm_arch_destroy_vm(struct kvm *kvm)
156 kvm_free_stage2_pgd(kvm);
158 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
160 kvm_arch_vcpu_free(kvm->vcpus[i]);
161 kvm->vcpus[i] = NULL;
166 int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
170 case KVM_CAP_IRQCHIP:
173 case KVM_CAP_DEVICE_CTRL:
174 case KVM_CAP_USER_MEMORY:
175 case KVM_CAP_SYNC_MMU:
176 case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
177 case KVM_CAP_ONE_REG:
178 case KVM_CAP_ARM_PSCI:
179 case KVM_CAP_ARM_PSCI_0_2:
182 case KVM_CAP_COALESCED_MMIO:
183 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
185 case KVM_CAP_ARM_SET_DEVICE_ADDR:
188 case KVM_CAP_NR_VCPUS:
189 r = num_online_cpus();
191 case KVM_CAP_MAX_VCPUS:
195 r = kvm_arch_dev_ioctl_check_extension(ext);
201 long kvm_arch_dev_ioctl(struct file *filp,
202 unsigned int ioctl, unsigned long arg)
208 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
211 struct kvm_vcpu *vcpu;
213 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
219 err = kvm_vcpu_init(vcpu, kvm, id);
223 err = create_hyp_mappings(vcpu, vcpu + 1);
229 kvm_vcpu_uninit(vcpu);
231 kmem_cache_free(kvm_vcpu_cache, vcpu);
236 int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
241 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
243 kvm_mmu_free_memory_caches(vcpu);
244 kvm_timer_vcpu_terminate(vcpu);
245 kmem_cache_free(kvm_vcpu_cache, vcpu);
248 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
250 kvm_arch_vcpu_free(vcpu);
253 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
258 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
262 /* Force users to call KVM_ARM_VCPU_INIT */
263 vcpu->arch.target = -1;
266 ret = kvm_vgic_vcpu_init(vcpu);
270 /* Set up the timer */
271 kvm_timer_vcpu_init(vcpu);
276 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
279 vcpu->arch.host_cpu_context = this_cpu_ptr(kvm_host_cpu_state);
282 * Check whether this vcpu requires the cache to be flushed on
283 * this physical CPU. This is a consequence of doing dcache
284 * operations by set/way on this vcpu. We do it here to be in
285 * a non-preemptible section.
287 if (cpumask_test_and_clear_cpu(cpu, &vcpu->arch.require_dcache_flush))
288 flush_cache_all(); /* We'd really want v7_flush_dcache_all() */
290 kvm_arm_set_running_vcpu(vcpu);
293 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
296 * The arch-generic KVM code expects the cpu field of a vcpu to be -1
297 * if the vcpu is no longer assigned to a cpu. This is used for the
298 * optimized make_all_cpus_request path.
302 kvm_arm_set_running_vcpu(NULL);
305 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
306 struct kvm_guest_debug *dbg)
312 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
313 struct kvm_mp_state *mp_state)
318 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
319 struct kvm_mp_state *mp_state)
325 * kvm_arch_vcpu_runnable - determine if the vcpu can be scheduled
326 * @v: The VCPU pointer
328 * If the guest CPU is not waiting for interrupts or an interrupt line is
329 * asserted, the CPU is by definition runnable.
331 int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
333 return !!v->arch.irq_lines || kvm_vgic_vcpu_pending_irq(v);
336 /* Just ensure a guest exit from a particular CPU */
337 static void exit_vm_noop(void *info)
341 void force_vm_exit(const cpumask_t *mask)
343 smp_call_function_many(mask, exit_vm_noop, NULL, true);
347 * need_new_vmid_gen - check that the VMID is still valid
348 * @kvm: The VM's VMID to checkt
350 * return true if there is a new generation of VMIDs being used
352 * The hardware supports only 256 values with the value zero reserved for the
353 * host, so we check if an assigned value belongs to a previous generation,
354 * which which requires us to assign a new value. If we're the first to use a
355 * VMID for the new generation, we must flush necessary caches and TLBs on all
358 static bool need_new_vmid_gen(struct kvm *kvm)
360 return unlikely(kvm->arch.vmid_gen != atomic64_read(&kvm_vmid_gen));
364 * update_vttbr - Update the VTTBR with a valid VMID before the guest runs
365 * @kvm The guest that we are about to run
367 * Called from kvm_arch_vcpu_ioctl_run before entering the guest to ensure the
368 * VM has a valid VMID, otherwise assigns a new one and flushes corresponding
371 static void update_vttbr(struct kvm *kvm)
373 phys_addr_t pgd_phys;
376 if (!need_new_vmid_gen(kvm))
379 spin_lock(&kvm_vmid_lock);
382 * We need to re-check the vmid_gen here to ensure that if another vcpu
383 * already allocated a valid vmid for this vm, then this vcpu should
386 if (!need_new_vmid_gen(kvm)) {
387 spin_unlock(&kvm_vmid_lock);
391 /* First user of a new VMID generation? */
392 if (unlikely(kvm_next_vmid == 0)) {
393 atomic64_inc(&kvm_vmid_gen);
397 * On SMP we know no other CPUs can use this CPU's or each
398 * other's VMID after force_vm_exit returns since the
399 * kvm_vmid_lock blocks them from reentry to the guest.
401 force_vm_exit(cpu_all_mask);
403 * Now broadcast TLB + ICACHE invalidation over the inner
404 * shareable domain to make sure all data structures are
407 kvm_call_hyp(__kvm_flush_vm_context);
410 kvm->arch.vmid_gen = atomic64_read(&kvm_vmid_gen);
411 kvm->arch.vmid = kvm_next_vmid;
414 /* update vttbr to be used with the new vmid */
415 pgd_phys = virt_to_phys(kvm->arch.pgd);
416 vmid = ((u64)(kvm->arch.vmid) << VTTBR_VMID_SHIFT) & VTTBR_VMID_MASK;
417 kvm->arch.vttbr = pgd_phys & VTTBR_BADDR_MASK;
418 kvm->arch.vttbr |= vmid;
420 spin_unlock(&kvm_vmid_lock);
423 static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
427 if (likely(vcpu->arch.has_run_once))
430 vcpu->arch.has_run_once = true;
433 * Initialize the VGIC before running a vcpu the first time on
436 if (unlikely(!vgic_initialized(vcpu->kvm))) {
437 ret = kvm_vgic_init(vcpu->kvm);
445 static void vcpu_pause(struct kvm_vcpu *vcpu)
447 wait_queue_head_t *wq = kvm_arch_vcpu_wq(vcpu);
449 wait_event_interruptible(*wq, !vcpu->arch.pause);
452 static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu)
454 return vcpu->arch.target >= 0;
458 * kvm_arch_vcpu_ioctl_run - the main VCPU run function to execute guest code
459 * @vcpu: The VCPU pointer
460 * @run: The kvm_run structure pointer used for userspace state exchange
462 * This function is called through the VCPU_RUN ioctl called from user space. It
463 * will execute VM code in a loop until the time slice for the process is used
464 * or some emulation is needed from user space in which case the function will
465 * return with return value 0 and with the kvm_run structure filled in with the
466 * required data for the requested emulation.
468 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
473 if (unlikely(!kvm_vcpu_initialized(vcpu)))
476 ret = kvm_vcpu_first_run_init(vcpu);
480 if (run->exit_reason == KVM_EXIT_MMIO) {
481 ret = kvm_handle_mmio_return(vcpu, vcpu->run);
486 if (vcpu->sigset_active)
487 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
490 run->exit_reason = KVM_EXIT_UNKNOWN;
493 * Check conditions before entering the guest
497 update_vttbr(vcpu->kvm);
499 if (vcpu->arch.pause)
502 kvm_vgic_flush_hwstate(vcpu);
503 kvm_timer_flush_hwstate(vcpu);
508 * Re-check atomic conditions
510 if (signal_pending(current)) {
512 run->exit_reason = KVM_EXIT_INTR;
515 if (ret <= 0 || need_new_vmid_gen(vcpu->kvm)) {
517 kvm_timer_sync_hwstate(vcpu);
518 kvm_vgic_sync_hwstate(vcpu);
522 /**************************************************************
525 trace_kvm_entry(*vcpu_pc(vcpu));
527 vcpu->mode = IN_GUEST_MODE;
529 ret = kvm_call_hyp(__kvm_vcpu_run, vcpu);
531 vcpu->mode = OUTSIDE_GUEST_MODE;
532 vcpu->arch.last_pcpu = smp_processor_id();
534 trace_kvm_exit(*vcpu_pc(vcpu));
536 * We may have taken a host interrupt in HYP mode (ie
537 * while executing the guest). This interrupt is still
538 * pending, as we haven't serviced it yet!
540 * We're now back in SVC mode, with interrupts
541 * disabled. Enabling the interrupts now will have
542 * the effect of taking the interrupt again, in SVC
549 *************************************************************/
551 kvm_timer_sync_hwstate(vcpu);
552 kvm_vgic_sync_hwstate(vcpu);
554 ret = handle_exit(vcpu, run, ret);
557 if (vcpu->sigset_active)
558 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
562 static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level)
568 if (number == KVM_ARM_IRQ_CPU_IRQ)
569 bit_index = __ffs(HCR_VI);
570 else /* KVM_ARM_IRQ_CPU_FIQ */
571 bit_index = __ffs(HCR_VF);
573 ptr = (unsigned long *)&vcpu->arch.irq_lines;
575 set = test_and_set_bit(bit_index, ptr);
577 set = test_and_clear_bit(bit_index, ptr);
580 * If we didn't change anything, no need to wake up or kick other CPUs
586 * The vcpu irq_lines field was updated, wake up sleeping VCPUs and
587 * trigger a world-switch round on the running physical CPU to set the
588 * virtual IRQ/FIQ fields in the HCR appropriately.
595 int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
598 u32 irq = irq_level->irq;
599 unsigned int irq_type, vcpu_idx, irq_num;
600 int nrcpus = atomic_read(&kvm->online_vcpus);
601 struct kvm_vcpu *vcpu = NULL;
602 bool level = irq_level->level;
604 irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK;
605 vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK;
606 irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK;
608 trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level);
611 case KVM_ARM_IRQ_TYPE_CPU:
612 if (irqchip_in_kernel(kvm))
615 if (vcpu_idx >= nrcpus)
618 vcpu = kvm_get_vcpu(kvm, vcpu_idx);
622 if (irq_num > KVM_ARM_IRQ_CPU_FIQ)
625 return vcpu_interrupt_line(vcpu, irq_num, level);
626 case KVM_ARM_IRQ_TYPE_PPI:
627 if (!irqchip_in_kernel(kvm))
630 if (vcpu_idx >= nrcpus)
633 vcpu = kvm_get_vcpu(kvm, vcpu_idx);
637 if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS)
640 return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level);
641 case KVM_ARM_IRQ_TYPE_SPI:
642 if (!irqchip_in_kernel(kvm))
645 if (irq_num < VGIC_NR_PRIVATE_IRQS ||
646 irq_num > KVM_ARM_IRQ_GIC_MAX)
649 return kvm_vgic_inject_irq(kvm, 0, irq_num, level);
655 static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu,
656 struct kvm_vcpu_init *init)
660 ret = kvm_vcpu_set_target(vcpu, init);
665 * Handle the "start in power-off" case by marking the VCPU as paused.
667 if (__test_and_clear_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features))
668 vcpu->arch.pause = true;
673 long kvm_arch_vcpu_ioctl(struct file *filp,
674 unsigned int ioctl, unsigned long arg)
676 struct kvm_vcpu *vcpu = filp->private_data;
677 void __user *argp = (void __user *)arg;
680 case KVM_ARM_VCPU_INIT: {
681 struct kvm_vcpu_init init;
683 if (copy_from_user(&init, argp, sizeof(init)))
686 return kvm_arch_vcpu_ioctl_vcpu_init(vcpu, &init);
688 case KVM_SET_ONE_REG:
689 case KVM_GET_ONE_REG: {
690 struct kvm_one_reg reg;
692 if (unlikely(!kvm_vcpu_initialized(vcpu)))
695 if (copy_from_user(®, argp, sizeof(reg)))
697 if (ioctl == KVM_SET_ONE_REG)
698 return kvm_arm_set_reg(vcpu, ®);
700 return kvm_arm_get_reg(vcpu, ®);
702 case KVM_GET_REG_LIST: {
703 struct kvm_reg_list __user *user_list = argp;
704 struct kvm_reg_list reg_list;
707 if (unlikely(!kvm_vcpu_initialized(vcpu)))
710 if (copy_from_user(®_list, user_list, sizeof(reg_list)))
713 reg_list.n = kvm_arm_num_regs(vcpu);
714 if (copy_to_user(user_list, ®_list, sizeof(reg_list)))
718 return kvm_arm_copy_reg_indices(vcpu, user_list->reg);
725 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
730 static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm,
731 struct kvm_arm_device_addr *dev_addr)
733 unsigned long dev_id, type;
735 dev_id = (dev_addr->id & KVM_ARM_DEVICE_ID_MASK) >>
736 KVM_ARM_DEVICE_ID_SHIFT;
737 type = (dev_addr->id & KVM_ARM_DEVICE_TYPE_MASK) >>
738 KVM_ARM_DEVICE_TYPE_SHIFT;
741 case KVM_ARM_DEVICE_VGIC_V2:
744 return kvm_vgic_addr(kvm, type, &dev_addr->addr, true);
750 long kvm_arch_vm_ioctl(struct file *filp,
751 unsigned int ioctl, unsigned long arg)
753 struct kvm *kvm = filp->private_data;
754 void __user *argp = (void __user *)arg;
757 case KVM_CREATE_IRQCHIP: {
759 return kvm_vgic_create(kvm);
763 case KVM_ARM_SET_DEVICE_ADDR: {
764 struct kvm_arm_device_addr dev_addr;
766 if (copy_from_user(&dev_addr, argp, sizeof(dev_addr)))
768 return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr);
770 case KVM_ARM_PREFERRED_TARGET: {
772 struct kvm_vcpu_init init;
774 err = kvm_vcpu_preferred_target(&init);
778 if (copy_to_user(argp, &init, sizeof(init)))
788 static void cpu_init_hyp_mode(void *dummy)
790 phys_addr_t boot_pgd_ptr;
792 unsigned long hyp_stack_ptr;
793 unsigned long stack_page;
794 unsigned long vector_ptr;
796 /* Switch from the HYP stub to our own HYP init vector */
797 __hyp_set_vectors(kvm_get_idmap_vector());
799 boot_pgd_ptr = kvm_mmu_get_boot_httbr();
800 pgd_ptr = kvm_mmu_get_httbr();
801 stack_page = __this_cpu_read(kvm_arm_hyp_stack_page);
802 hyp_stack_ptr = stack_page + PAGE_SIZE;
803 vector_ptr = (unsigned long)__kvm_hyp_vector;
805 __cpu_init_hyp_mode(boot_pgd_ptr, pgd_ptr, hyp_stack_ptr, vector_ptr);
808 static int hyp_init_cpu_notify(struct notifier_block *self,
809 unsigned long action, void *cpu)
813 case CPU_STARTING_FROZEN:
814 cpu_init_hyp_mode(NULL);
821 static struct notifier_block hyp_init_cpu_nb = {
822 .notifier_call = hyp_init_cpu_notify,
826 static int hyp_init_cpu_pm_notifier(struct notifier_block *self,
830 if (cmd == CPU_PM_EXIT &&
831 __hyp_get_vectors() == hyp_default_vectors) {
832 cpu_init_hyp_mode(NULL);
839 static struct notifier_block hyp_init_cpu_pm_nb = {
840 .notifier_call = hyp_init_cpu_pm_notifier,
843 static void __init hyp_cpu_pm_init(void)
845 cpu_pm_register_notifier(&hyp_init_cpu_pm_nb);
848 static inline void hyp_cpu_pm_init(void)
854 * Inits Hyp-mode on all online CPUs
856 static int init_hyp_mode(void)
862 * Allocate Hyp PGD and setup Hyp identity mapping
864 err = kvm_mmu_init();
869 * It is probably enough to obtain the default on one
870 * CPU. It's unlikely to be different on the others.
872 hyp_default_vectors = __hyp_get_vectors();
875 * Allocate stack pages for Hypervisor-mode
877 for_each_possible_cpu(cpu) {
878 unsigned long stack_page;
880 stack_page = __get_free_page(GFP_KERNEL);
883 goto out_free_stack_pages;
886 per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page;
890 * Map the Hyp-code called directly from the host
892 err = create_hyp_mappings(__kvm_hyp_code_start, __kvm_hyp_code_end);
894 kvm_err("Cannot map world-switch code\n");
895 goto out_free_mappings;
899 * Map the Hyp stack pages
901 for_each_possible_cpu(cpu) {
902 char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu);
903 err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE);
906 kvm_err("Cannot map hyp stack\n");
907 goto out_free_mappings;
912 * Map the host CPU structures
914 kvm_host_cpu_state = alloc_percpu(kvm_cpu_context_t);
915 if (!kvm_host_cpu_state) {
917 kvm_err("Cannot allocate host CPU state\n");
918 goto out_free_mappings;
921 for_each_possible_cpu(cpu) {
922 kvm_cpu_context_t *cpu_ctxt;
924 cpu_ctxt = per_cpu_ptr(kvm_host_cpu_state, cpu);
925 err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1);
928 kvm_err("Cannot map host CPU state: %d\n", err);
929 goto out_free_context;
934 * Execute the init code on each CPU.
936 on_each_cpu(cpu_init_hyp_mode, NULL, 1);
939 * Init HYP view of VGIC
941 err = kvm_vgic_hyp_init();
943 goto out_free_context;
945 #ifdef CONFIG_KVM_ARM_VGIC
950 * Init HYP architected timer support
952 err = kvm_timer_hyp_init();
954 goto out_free_mappings;
956 #ifndef CONFIG_HOTPLUG_CPU
962 kvm_info("Hyp mode initialized successfully\n");
966 free_percpu(kvm_host_cpu_state);
969 out_free_stack_pages:
970 for_each_possible_cpu(cpu)
971 free_page(per_cpu(kvm_arm_hyp_stack_page, cpu));
973 kvm_err("error initializing Hyp mode: %d\n", err);
977 static void check_kvm_target_cpu(void *ret)
979 *(int *)ret = kvm_target_cpu();
983 * Initialize Hyp-mode and memory mappings on all CPUs.
985 int kvm_arch_init(void *opaque)
990 if (!is_hyp_mode_available()) {
991 kvm_err("HYP mode not available\n");
995 for_each_online_cpu(cpu) {
996 smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1);
998 kvm_err("Error, CPU %d not supported!\n", cpu);
1003 cpu_notifier_register_begin();
1005 err = init_hyp_mode();
1009 err = __register_cpu_notifier(&hyp_init_cpu_nb);
1011 kvm_err("Cannot register HYP init CPU notifier (%d)\n", err);
1015 cpu_notifier_register_done();
1019 kvm_coproc_table_init();
1022 cpu_notifier_register_done();
1026 /* NOP: Compiling as a module not supported */
1027 void kvm_arch_exit(void)
1029 kvm_perf_teardown();
1032 static int arm_init(void)
1034 int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
1038 module_init(arm_init);