19ed24f4bSMarc Zyngier // SPDX-License-Identifier: GPL-2.0-only 29ed24f4bSMarc Zyngier /* 39ed24f4bSMarc Zyngier * Copyright (C) 2012 - Virtual Open Systems and Columbia University 49ed24f4bSMarc Zyngier * Author: Christoffer Dall <c.dall@virtualopensystems.com> 59ed24f4bSMarc Zyngier */ 69ed24f4bSMarc Zyngier 79ed24f4bSMarc Zyngier #include <linux/bug.h> 89ed24f4bSMarc Zyngier #include <linux/cpu_pm.h> 99ed24f4bSMarc Zyngier #include <linux/errno.h> 109ed24f4bSMarc Zyngier #include <linux/err.h> 119ed24f4bSMarc Zyngier #include <linux/kvm_host.h> 129ed24f4bSMarc Zyngier #include <linux/list.h> 139ed24f4bSMarc Zyngier #include <linux/module.h> 149ed24f4bSMarc Zyngier #include <linux/vmalloc.h> 159ed24f4bSMarc Zyngier #include <linux/fs.h> 169ed24f4bSMarc Zyngier #include <linux/mman.h> 179ed24f4bSMarc Zyngier #include <linux/sched.h> 189ed24f4bSMarc Zyngier #include <linux/kvm.h> 199ed24f4bSMarc Zyngier #include <linux/kvm_irqfd.h> 209ed24f4bSMarc Zyngier #include <linux/irqbypass.h> 219ed24f4bSMarc Zyngier #include <linux/sched/stat.h> 22eeeee719SDavid Brazdil #include <linux/psci.h> 239ed24f4bSMarc Zyngier #include <trace/events/kvm.h> 249ed24f4bSMarc Zyngier 259ed24f4bSMarc Zyngier #define CREATE_TRACE_POINTS 269ed24f4bSMarc Zyngier #include "trace_arm.h" 279ed24f4bSMarc Zyngier 289ed24f4bSMarc Zyngier #include <linux/uaccess.h> 299ed24f4bSMarc Zyngier #include <asm/ptrace.h> 309ed24f4bSMarc Zyngier #include <asm/mman.h> 319ed24f4bSMarc Zyngier #include <asm/tlbflush.h> 329ed24f4bSMarc Zyngier #include <asm/cacheflush.h> 339ed24f4bSMarc Zyngier #include <asm/cpufeature.h> 349ed24f4bSMarc Zyngier #include <asm/virt.h> 359ed24f4bSMarc Zyngier #include <asm/kvm_arm.h> 369ed24f4bSMarc Zyngier #include <asm/kvm_asm.h> 379ed24f4bSMarc Zyngier #include <asm/kvm_mmu.h> 389ed24f4bSMarc Zyngier #include <asm/kvm_emulate.h> 399ed24f4bSMarc Zyngier #include <asm/sections.h> 409ed24f4bSMarc Zyngier 419ed24f4bSMarc Zyngier #include <kvm/arm_hypercalls.h> 429ed24f4bSMarc Zyngier #include <kvm/arm_pmu.h> 439ed24f4bSMarc Zyngier #include <kvm/arm_psci.h> 449ed24f4bSMarc Zyngier 459ed24f4bSMarc Zyngier #ifdef REQUIRES_VIRT 469ed24f4bSMarc Zyngier __asm__(".arch_extension virt"); 479ed24f4bSMarc Zyngier #endif 489ed24f4bSMarc Zyngier 49d8b369c4SDavid Brazdil static enum kvm_mode kvm_mode = KVM_MODE_DEFAULT; 50f19f6644SDavid Brazdil DEFINE_STATIC_KEY_FALSE(kvm_protected_mode_initialized); 51d8b369c4SDavid Brazdil 5214ef9d04SMarc Zyngier DECLARE_KVM_HYP_PER_CPU(unsigned long, kvm_hyp_vector); 5314ef9d04SMarc Zyngier 549ed24f4bSMarc Zyngier static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page); 5530c95391SDavid Brazdil unsigned long kvm_arm_hyp_percpu_base[NR_CPUS]; 5663fec243SDavid Brazdil DECLARE_KVM_NVHE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params); 579ed24f4bSMarc Zyngier 589ed24f4bSMarc Zyngier /* The VMID used in the VTTBR */ 599ed24f4bSMarc Zyngier static atomic64_t kvm_vmid_gen = ATOMIC64_INIT(1); 609ed24f4bSMarc Zyngier static u32 kvm_next_vmid; 619ed24f4bSMarc Zyngier static DEFINE_SPINLOCK(kvm_vmid_lock); 629ed24f4bSMarc Zyngier 639ed24f4bSMarc Zyngier static bool vgic_present; 649ed24f4bSMarc Zyngier 659ed24f4bSMarc Zyngier static DEFINE_PER_CPU(unsigned char, kvm_arm_hardware_enabled); 669ed24f4bSMarc Zyngier DEFINE_STATIC_KEY_FALSE(userspace_irqchip_in_use); 679ed24f4bSMarc Zyngier 689ed24f4bSMarc Zyngier int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) 699ed24f4bSMarc Zyngier { 709ed24f4bSMarc Zyngier return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; 719ed24f4bSMarc Zyngier } 729ed24f4bSMarc Zyngier 739ed24f4bSMarc Zyngier int kvm_arch_hardware_setup(void *opaque) 749ed24f4bSMarc Zyngier { 759ed24f4bSMarc Zyngier return 0; 769ed24f4bSMarc Zyngier } 779ed24f4bSMarc Zyngier 789ed24f4bSMarc Zyngier int kvm_arch_check_processor_compat(void *opaque) 799ed24f4bSMarc Zyngier { 809ed24f4bSMarc Zyngier return 0; 819ed24f4bSMarc Zyngier } 829ed24f4bSMarc Zyngier 839ed24f4bSMarc Zyngier int kvm_vm_ioctl_enable_cap(struct kvm *kvm, 849ed24f4bSMarc Zyngier struct kvm_enable_cap *cap) 859ed24f4bSMarc Zyngier { 869ed24f4bSMarc Zyngier int r; 879ed24f4bSMarc Zyngier 889ed24f4bSMarc Zyngier if (cap->flags) 899ed24f4bSMarc Zyngier return -EINVAL; 909ed24f4bSMarc Zyngier 919ed24f4bSMarc Zyngier switch (cap->cap) { 929ed24f4bSMarc Zyngier case KVM_CAP_ARM_NISV_TO_USER: 939ed24f4bSMarc Zyngier r = 0; 949ed24f4bSMarc Zyngier kvm->arch.return_nisv_io_abort_to_user = true; 959ed24f4bSMarc Zyngier break; 969ed24f4bSMarc Zyngier default: 979ed24f4bSMarc Zyngier r = -EINVAL; 989ed24f4bSMarc Zyngier break; 999ed24f4bSMarc Zyngier } 1009ed24f4bSMarc Zyngier 1019ed24f4bSMarc Zyngier return r; 1029ed24f4bSMarc Zyngier } 1039ed24f4bSMarc Zyngier 1045107000fSMarc Zyngier static int kvm_arm_default_max_vcpus(void) 1055107000fSMarc Zyngier { 1065107000fSMarc Zyngier return vgic_present ? kvm_vgic_get_max_vcpus() : KVM_MAX_VCPUS; 1075107000fSMarc Zyngier } 1085107000fSMarc Zyngier 1094f1df628SMarc Zyngier static void set_default_spectre(struct kvm *kvm) 11023711a5eSMarc Zyngier { 11123711a5eSMarc Zyngier /* 11223711a5eSMarc Zyngier * The default is to expose CSV2 == 1 if the HW isn't affected. 11323711a5eSMarc Zyngier * Although this is a per-CPU feature, we make it global because 11423711a5eSMarc Zyngier * asymmetric systems are just a nuisance. 11523711a5eSMarc Zyngier * 11623711a5eSMarc Zyngier * Userspace can override this as long as it doesn't promise 11723711a5eSMarc Zyngier * the impossible. 11823711a5eSMarc Zyngier */ 11923711a5eSMarc Zyngier if (arm64_get_spectre_v2_state() == SPECTRE_UNAFFECTED) 12023711a5eSMarc Zyngier kvm->arch.pfr0_csv2 = 1; 1214f1df628SMarc Zyngier if (arm64_get_meltdown_state() == SPECTRE_UNAFFECTED) 1224f1df628SMarc Zyngier kvm->arch.pfr0_csv3 = 1; 12323711a5eSMarc Zyngier } 12423711a5eSMarc Zyngier 1259ed24f4bSMarc Zyngier /** 1269ed24f4bSMarc Zyngier * kvm_arch_init_vm - initializes a VM data structure 1279ed24f4bSMarc Zyngier * @kvm: pointer to the KVM struct 1289ed24f4bSMarc Zyngier */ 1299ed24f4bSMarc Zyngier int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) 1309ed24f4bSMarc Zyngier { 131a0e50aa3SChristoffer Dall int ret; 1329ed24f4bSMarc Zyngier 1339ed24f4bSMarc Zyngier ret = kvm_arm_setup_stage2(kvm, type); 1349ed24f4bSMarc Zyngier if (ret) 1359ed24f4bSMarc Zyngier return ret; 1369ed24f4bSMarc Zyngier 137a0e50aa3SChristoffer Dall ret = kvm_init_stage2_mmu(kvm, &kvm->arch.mmu); 1389ed24f4bSMarc Zyngier if (ret) 139a0e50aa3SChristoffer Dall return ret; 1409ed24f4bSMarc Zyngier 1419ed24f4bSMarc Zyngier ret = create_hyp_mappings(kvm, kvm + 1, PAGE_HYP); 1429ed24f4bSMarc Zyngier if (ret) 1439ed24f4bSMarc Zyngier goto out_free_stage2_pgd; 1449ed24f4bSMarc Zyngier 1459ed24f4bSMarc Zyngier kvm_vgic_early_init(kvm); 1469ed24f4bSMarc Zyngier 1479ed24f4bSMarc Zyngier /* The maximum number of VCPUs is limited by the host's GIC model */ 1485107000fSMarc Zyngier kvm->arch.max_vcpus = kvm_arm_default_max_vcpus(); 1499ed24f4bSMarc Zyngier 1504f1df628SMarc Zyngier set_default_spectre(kvm); 15123711a5eSMarc Zyngier 1529ed24f4bSMarc Zyngier return ret; 1539ed24f4bSMarc Zyngier out_free_stage2_pgd: 154a0e50aa3SChristoffer Dall kvm_free_stage2_pgd(&kvm->arch.mmu); 1559ed24f4bSMarc Zyngier return ret; 1569ed24f4bSMarc Zyngier } 1579ed24f4bSMarc Zyngier 1589ed24f4bSMarc Zyngier vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) 1599ed24f4bSMarc Zyngier { 1609ed24f4bSMarc Zyngier return VM_FAULT_SIGBUS; 1619ed24f4bSMarc Zyngier } 1629ed24f4bSMarc Zyngier 1639ed24f4bSMarc Zyngier 1649ed24f4bSMarc Zyngier /** 1659ed24f4bSMarc Zyngier * kvm_arch_destroy_vm - destroy the VM data structure 1669ed24f4bSMarc Zyngier * @kvm: pointer to the KVM struct 1679ed24f4bSMarc Zyngier */ 1689ed24f4bSMarc Zyngier void kvm_arch_destroy_vm(struct kvm *kvm) 1699ed24f4bSMarc Zyngier { 1709ed24f4bSMarc Zyngier int i; 1719ed24f4bSMarc Zyngier 172d7eec236SMarc Zyngier bitmap_free(kvm->arch.pmu_filter); 173d7eec236SMarc Zyngier 1749ed24f4bSMarc Zyngier kvm_vgic_destroy(kvm); 1759ed24f4bSMarc Zyngier 1769ed24f4bSMarc Zyngier for (i = 0; i < KVM_MAX_VCPUS; ++i) { 1779ed24f4bSMarc Zyngier if (kvm->vcpus[i]) { 1789ed24f4bSMarc Zyngier kvm_vcpu_destroy(kvm->vcpus[i]); 1799ed24f4bSMarc Zyngier kvm->vcpus[i] = NULL; 1809ed24f4bSMarc Zyngier } 1819ed24f4bSMarc Zyngier } 1829ed24f4bSMarc Zyngier atomic_set(&kvm->online_vcpus, 0); 1839ed24f4bSMarc Zyngier } 1849ed24f4bSMarc Zyngier 1859ed24f4bSMarc Zyngier int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) 1869ed24f4bSMarc Zyngier { 1879ed24f4bSMarc Zyngier int r; 1889ed24f4bSMarc Zyngier switch (ext) { 1899ed24f4bSMarc Zyngier case KVM_CAP_IRQCHIP: 1909ed24f4bSMarc Zyngier r = vgic_present; 1919ed24f4bSMarc Zyngier break; 1929ed24f4bSMarc Zyngier case KVM_CAP_IOEVENTFD: 1939ed24f4bSMarc Zyngier case KVM_CAP_DEVICE_CTRL: 1949ed24f4bSMarc Zyngier case KVM_CAP_USER_MEMORY: 1959ed24f4bSMarc Zyngier case KVM_CAP_SYNC_MMU: 1969ed24f4bSMarc Zyngier case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: 1979ed24f4bSMarc Zyngier case KVM_CAP_ONE_REG: 1989ed24f4bSMarc Zyngier case KVM_CAP_ARM_PSCI: 1999ed24f4bSMarc Zyngier case KVM_CAP_ARM_PSCI_0_2: 2009ed24f4bSMarc Zyngier case KVM_CAP_READONLY_MEM: 2019ed24f4bSMarc Zyngier case KVM_CAP_MP_STATE: 2029ed24f4bSMarc Zyngier case KVM_CAP_IMMEDIATE_EXIT: 2039ed24f4bSMarc Zyngier case KVM_CAP_VCPU_EVENTS: 2049ed24f4bSMarc Zyngier case KVM_CAP_ARM_IRQ_LINE_LAYOUT_2: 2059ed24f4bSMarc Zyngier case KVM_CAP_ARM_NISV_TO_USER: 2069ed24f4bSMarc Zyngier case KVM_CAP_ARM_INJECT_EXT_DABT: 20736fb4cd5SWill Deacon case KVM_CAP_SET_GUEST_DEBUG: 20836fb4cd5SWill Deacon case KVM_CAP_VCPU_ATTRIBUTES: 2099ed24f4bSMarc Zyngier r = 1; 2109ed24f4bSMarc Zyngier break; 2119ed24f4bSMarc Zyngier case KVM_CAP_ARM_SET_DEVICE_ADDR: 2129ed24f4bSMarc Zyngier r = 1; 2139ed24f4bSMarc Zyngier break; 2149ed24f4bSMarc Zyngier case KVM_CAP_NR_VCPUS: 2159ed24f4bSMarc Zyngier r = num_online_cpus(); 2169ed24f4bSMarc Zyngier break; 2179ed24f4bSMarc Zyngier case KVM_CAP_MAX_VCPUS: 2189ed24f4bSMarc Zyngier case KVM_CAP_MAX_VCPU_ID: 2195107000fSMarc Zyngier if (kvm) 2205107000fSMarc Zyngier r = kvm->arch.max_vcpus; 2215107000fSMarc Zyngier else 2225107000fSMarc Zyngier r = kvm_arm_default_max_vcpus(); 2239ed24f4bSMarc Zyngier break; 2249ed24f4bSMarc Zyngier case KVM_CAP_MSI_DEVID: 2259ed24f4bSMarc Zyngier if (!kvm) 2269ed24f4bSMarc Zyngier r = -EINVAL; 2279ed24f4bSMarc Zyngier else 2289ed24f4bSMarc Zyngier r = kvm->arch.vgic.msis_require_devid; 2299ed24f4bSMarc Zyngier break; 2309ed24f4bSMarc Zyngier case KVM_CAP_ARM_USER_IRQ: 2319ed24f4bSMarc Zyngier /* 2329ed24f4bSMarc Zyngier * 1: EL1_VTIMER, EL1_PTIMER, and PMU. 2339ed24f4bSMarc Zyngier * (bump this number if adding more devices) 2349ed24f4bSMarc Zyngier */ 2359ed24f4bSMarc Zyngier r = 1; 2369ed24f4bSMarc Zyngier break; 237004a0124SAndrew Jones case KVM_CAP_STEAL_TIME: 238004a0124SAndrew Jones r = kvm_arm_pvtime_supported(); 239004a0124SAndrew Jones break; 24036fb4cd5SWill Deacon case KVM_CAP_ARM_EL1_32BIT: 24136fb4cd5SWill Deacon r = cpus_have_const_cap(ARM64_HAS_32BIT_EL1); 2429ed24f4bSMarc Zyngier break; 24336fb4cd5SWill Deacon case KVM_CAP_GUEST_DEBUG_HW_BPS: 24436fb4cd5SWill Deacon r = get_num_brps(); 24536fb4cd5SWill Deacon break; 24636fb4cd5SWill Deacon case KVM_CAP_GUEST_DEBUG_HW_WPS: 24736fb4cd5SWill Deacon r = get_num_wrps(); 24836fb4cd5SWill Deacon break; 24936fb4cd5SWill Deacon case KVM_CAP_ARM_PMU_V3: 25036fb4cd5SWill Deacon r = kvm_arm_support_pmu_v3(); 25136fb4cd5SWill Deacon break; 25236fb4cd5SWill Deacon case KVM_CAP_ARM_INJECT_SERROR_ESR: 25336fb4cd5SWill Deacon r = cpus_have_const_cap(ARM64_HAS_RAS_EXTN); 25436fb4cd5SWill Deacon break; 25536fb4cd5SWill Deacon case KVM_CAP_ARM_VM_IPA_SIZE: 25636fb4cd5SWill Deacon r = get_kvm_ipa_limit(); 25736fb4cd5SWill Deacon break; 25836fb4cd5SWill Deacon case KVM_CAP_ARM_SVE: 25936fb4cd5SWill Deacon r = system_supports_sve(); 26036fb4cd5SWill Deacon break; 26136fb4cd5SWill Deacon case KVM_CAP_ARM_PTRAUTH_ADDRESS: 26236fb4cd5SWill Deacon case KVM_CAP_ARM_PTRAUTH_GENERIC: 26336fb4cd5SWill Deacon r = system_has_full_ptr_auth(); 26436fb4cd5SWill Deacon break; 26536fb4cd5SWill Deacon default: 26636fb4cd5SWill Deacon r = 0; 2679ed24f4bSMarc Zyngier } 26836fb4cd5SWill Deacon 2699ed24f4bSMarc Zyngier return r; 2709ed24f4bSMarc Zyngier } 2719ed24f4bSMarc Zyngier 2729ed24f4bSMarc Zyngier long kvm_arch_dev_ioctl(struct file *filp, 2739ed24f4bSMarc Zyngier unsigned int ioctl, unsigned long arg) 2749ed24f4bSMarc Zyngier { 2759ed24f4bSMarc Zyngier return -EINVAL; 2769ed24f4bSMarc Zyngier } 2779ed24f4bSMarc Zyngier 2789ed24f4bSMarc Zyngier struct kvm *kvm_arch_alloc_vm(void) 2799ed24f4bSMarc Zyngier { 2809ed24f4bSMarc Zyngier if (!has_vhe()) 2819ed24f4bSMarc Zyngier return kzalloc(sizeof(struct kvm), GFP_KERNEL); 2829ed24f4bSMarc Zyngier 2839ed24f4bSMarc Zyngier return vzalloc(sizeof(struct kvm)); 2849ed24f4bSMarc Zyngier } 2859ed24f4bSMarc Zyngier 2869ed24f4bSMarc Zyngier void kvm_arch_free_vm(struct kvm *kvm) 2879ed24f4bSMarc Zyngier { 2889ed24f4bSMarc Zyngier if (!has_vhe()) 2899ed24f4bSMarc Zyngier kfree(kvm); 2909ed24f4bSMarc Zyngier else 2919ed24f4bSMarc Zyngier vfree(kvm); 2929ed24f4bSMarc Zyngier } 2939ed24f4bSMarc Zyngier 2949ed24f4bSMarc Zyngier int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id) 2959ed24f4bSMarc Zyngier { 2969ed24f4bSMarc Zyngier if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) 2979ed24f4bSMarc Zyngier return -EBUSY; 2989ed24f4bSMarc Zyngier 2999ed24f4bSMarc Zyngier if (id >= kvm->arch.max_vcpus) 3009ed24f4bSMarc Zyngier return -EINVAL; 3019ed24f4bSMarc Zyngier 3029ed24f4bSMarc Zyngier return 0; 3039ed24f4bSMarc Zyngier } 3049ed24f4bSMarc Zyngier 3059ed24f4bSMarc Zyngier int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu) 3069ed24f4bSMarc Zyngier { 3079ed24f4bSMarc Zyngier int err; 3089ed24f4bSMarc Zyngier 3099ed24f4bSMarc Zyngier /* Force users to call KVM_ARM_VCPU_INIT */ 3109ed24f4bSMarc Zyngier vcpu->arch.target = -1; 3119ed24f4bSMarc Zyngier bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES); 3129ed24f4bSMarc Zyngier 313e539451bSSean Christopherson vcpu->arch.mmu_page_cache.gfp_zero = __GFP_ZERO; 314e539451bSSean Christopherson 3159ed24f4bSMarc Zyngier /* Set up the timer */ 3169ed24f4bSMarc Zyngier kvm_timer_vcpu_init(vcpu); 3179ed24f4bSMarc Zyngier 3189ed24f4bSMarc Zyngier kvm_pmu_vcpu_init(vcpu); 3199ed24f4bSMarc Zyngier 3209ed24f4bSMarc Zyngier kvm_arm_reset_debug_ptr(vcpu); 3219ed24f4bSMarc Zyngier 3229ed24f4bSMarc Zyngier kvm_arm_pvtime_vcpu_init(&vcpu->arch); 3239ed24f4bSMarc Zyngier 324a0e50aa3SChristoffer Dall vcpu->arch.hw_mmu = &vcpu->kvm->arch.mmu; 325a0e50aa3SChristoffer Dall 3269ed24f4bSMarc Zyngier err = kvm_vgic_vcpu_init(vcpu); 3279ed24f4bSMarc Zyngier if (err) 3289ed24f4bSMarc Zyngier return err; 3299ed24f4bSMarc Zyngier 3309ed24f4bSMarc Zyngier return create_hyp_mappings(vcpu, vcpu + 1, PAGE_HYP); 3319ed24f4bSMarc Zyngier } 3329ed24f4bSMarc Zyngier 3339ed24f4bSMarc Zyngier void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) 3349ed24f4bSMarc Zyngier { 3359ed24f4bSMarc Zyngier } 3369ed24f4bSMarc Zyngier 3379ed24f4bSMarc Zyngier void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) 3389ed24f4bSMarc Zyngier { 3399ed24f4bSMarc Zyngier if (vcpu->arch.has_run_once && unlikely(!irqchip_in_kernel(vcpu->kvm))) 3409ed24f4bSMarc Zyngier static_branch_dec(&userspace_irqchip_in_use); 3419ed24f4bSMarc Zyngier 3429af3e08bSWill Deacon kvm_mmu_free_memory_cache(&vcpu->arch.mmu_page_cache); 3439ed24f4bSMarc Zyngier kvm_timer_vcpu_terminate(vcpu); 3449ed24f4bSMarc Zyngier kvm_pmu_vcpu_destroy(vcpu); 3459ed24f4bSMarc Zyngier 3469ed24f4bSMarc Zyngier kvm_arm_vcpu_destroy(vcpu); 3479ed24f4bSMarc Zyngier } 3489ed24f4bSMarc Zyngier 3499ed24f4bSMarc Zyngier int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) 3509ed24f4bSMarc Zyngier { 3519ed24f4bSMarc Zyngier return kvm_timer_is_pending(vcpu); 3529ed24f4bSMarc Zyngier } 3539ed24f4bSMarc Zyngier 3549ed24f4bSMarc Zyngier void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) 3559ed24f4bSMarc Zyngier { 3569ed24f4bSMarc Zyngier /* 3579ed24f4bSMarc Zyngier * If we're about to block (most likely because we've just hit a 3589ed24f4bSMarc Zyngier * WFI), we need to sync back the state of the GIC CPU interface 3599ed24f4bSMarc Zyngier * so that we have the latest PMR and group enables. This ensures 3609ed24f4bSMarc Zyngier * that kvm_arch_vcpu_runnable has up-to-date data to decide 3619ed24f4bSMarc Zyngier * whether we have pending interrupts. 3629ed24f4bSMarc Zyngier * 3639ed24f4bSMarc Zyngier * For the same reason, we want to tell GICv4 that we need 3649ed24f4bSMarc Zyngier * doorbells to be signalled, should an interrupt become pending. 3659ed24f4bSMarc Zyngier */ 3669ed24f4bSMarc Zyngier preempt_disable(); 3679ed24f4bSMarc Zyngier kvm_vgic_vmcr_sync(vcpu); 3689ed24f4bSMarc Zyngier vgic_v4_put(vcpu, true); 3699ed24f4bSMarc Zyngier preempt_enable(); 3709ed24f4bSMarc Zyngier } 3719ed24f4bSMarc Zyngier 3729ed24f4bSMarc Zyngier void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) 3739ed24f4bSMarc Zyngier { 3749ed24f4bSMarc Zyngier preempt_disable(); 3759ed24f4bSMarc Zyngier vgic_v4_load(vcpu); 3769ed24f4bSMarc Zyngier preempt_enable(); 3779ed24f4bSMarc Zyngier } 3789ed24f4bSMarc Zyngier 3799ed24f4bSMarc Zyngier void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) 3809ed24f4bSMarc Zyngier { 381a0e50aa3SChristoffer Dall struct kvm_s2_mmu *mmu; 3829ed24f4bSMarc Zyngier int *last_ran; 3839ed24f4bSMarc Zyngier 384a0e50aa3SChristoffer Dall mmu = vcpu->arch.hw_mmu; 385a0e50aa3SChristoffer Dall last_ran = this_cpu_ptr(mmu->last_vcpu_ran); 3869ed24f4bSMarc Zyngier 3879ed24f4bSMarc Zyngier /* 3889ed24f4bSMarc Zyngier * We might get preempted before the vCPU actually runs, but 3899ed24f4bSMarc Zyngier * over-invalidation doesn't affect correctness. 3909ed24f4bSMarc Zyngier */ 3919ed24f4bSMarc Zyngier if (*last_ran != vcpu->vcpu_id) { 392a0e50aa3SChristoffer Dall kvm_call_hyp(__kvm_tlb_flush_local_vmid, mmu); 3939ed24f4bSMarc Zyngier *last_ran = vcpu->vcpu_id; 3949ed24f4bSMarc Zyngier } 3959ed24f4bSMarc Zyngier 3969ed24f4bSMarc Zyngier vcpu->cpu = cpu; 3979ed24f4bSMarc Zyngier 3989ed24f4bSMarc Zyngier kvm_vgic_load(vcpu); 3999ed24f4bSMarc Zyngier kvm_timer_vcpu_load(vcpu); 40013aeb9b4SDavid Brazdil if (has_vhe()) 40113aeb9b4SDavid Brazdil kvm_vcpu_load_sysregs_vhe(vcpu); 4029ed24f4bSMarc Zyngier kvm_arch_vcpu_load_fp(vcpu); 4039ed24f4bSMarc Zyngier kvm_vcpu_pmu_restore_guest(vcpu); 4049ed24f4bSMarc Zyngier if (kvm_arm_is_pvtime_enabled(&vcpu->arch)) 4059ed24f4bSMarc Zyngier kvm_make_request(KVM_REQ_RECORD_STEAL, vcpu); 4069ed24f4bSMarc Zyngier 4079ed24f4bSMarc Zyngier if (single_task_running()) 4089ed24f4bSMarc Zyngier vcpu_clear_wfx_traps(vcpu); 4099ed24f4bSMarc Zyngier else 4109ed24f4bSMarc Zyngier vcpu_set_wfx_traps(vcpu); 4119ed24f4bSMarc Zyngier 41229eb5a3cSMarc Zyngier if (vcpu_has_ptrauth(vcpu)) 413ef3e40a7SMarc Zyngier vcpu_ptrauth_disable(vcpu); 4149ed24f4bSMarc Zyngier } 4159ed24f4bSMarc Zyngier 4169ed24f4bSMarc Zyngier void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) 4179ed24f4bSMarc Zyngier { 4189ed24f4bSMarc Zyngier kvm_arch_vcpu_put_fp(vcpu); 41913aeb9b4SDavid Brazdil if (has_vhe()) 42013aeb9b4SDavid Brazdil kvm_vcpu_put_sysregs_vhe(vcpu); 4219ed24f4bSMarc Zyngier kvm_timer_vcpu_put(vcpu); 4229ed24f4bSMarc Zyngier kvm_vgic_put(vcpu); 4239ed24f4bSMarc Zyngier kvm_vcpu_pmu_restore_host(vcpu); 4249ed24f4bSMarc Zyngier 4259ed24f4bSMarc Zyngier vcpu->cpu = -1; 4269ed24f4bSMarc Zyngier } 4279ed24f4bSMarc Zyngier 4289ed24f4bSMarc Zyngier static void vcpu_power_off(struct kvm_vcpu *vcpu) 4299ed24f4bSMarc Zyngier { 4309ed24f4bSMarc Zyngier vcpu->arch.power_off = true; 4319ed24f4bSMarc Zyngier kvm_make_request(KVM_REQ_SLEEP, vcpu); 4329ed24f4bSMarc Zyngier kvm_vcpu_kick(vcpu); 4339ed24f4bSMarc Zyngier } 4349ed24f4bSMarc Zyngier 4359ed24f4bSMarc Zyngier int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 4369ed24f4bSMarc Zyngier struct kvm_mp_state *mp_state) 4379ed24f4bSMarc Zyngier { 4389ed24f4bSMarc Zyngier if (vcpu->arch.power_off) 4399ed24f4bSMarc Zyngier mp_state->mp_state = KVM_MP_STATE_STOPPED; 4409ed24f4bSMarc Zyngier else 4419ed24f4bSMarc Zyngier mp_state->mp_state = KVM_MP_STATE_RUNNABLE; 4429ed24f4bSMarc Zyngier 4439ed24f4bSMarc Zyngier return 0; 4449ed24f4bSMarc Zyngier } 4459ed24f4bSMarc Zyngier 4469ed24f4bSMarc Zyngier int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 4479ed24f4bSMarc Zyngier struct kvm_mp_state *mp_state) 4489ed24f4bSMarc Zyngier { 4499ed24f4bSMarc Zyngier int ret = 0; 4509ed24f4bSMarc Zyngier 4519ed24f4bSMarc Zyngier switch (mp_state->mp_state) { 4529ed24f4bSMarc Zyngier case KVM_MP_STATE_RUNNABLE: 4539ed24f4bSMarc Zyngier vcpu->arch.power_off = false; 4549ed24f4bSMarc Zyngier break; 4559ed24f4bSMarc Zyngier case KVM_MP_STATE_STOPPED: 4569ed24f4bSMarc Zyngier vcpu_power_off(vcpu); 4579ed24f4bSMarc Zyngier break; 4589ed24f4bSMarc Zyngier default: 4599ed24f4bSMarc Zyngier ret = -EINVAL; 4609ed24f4bSMarc Zyngier } 4619ed24f4bSMarc Zyngier 4629ed24f4bSMarc Zyngier return ret; 4639ed24f4bSMarc Zyngier } 4649ed24f4bSMarc Zyngier 4659ed24f4bSMarc Zyngier /** 4669ed24f4bSMarc Zyngier * kvm_arch_vcpu_runnable - determine if the vcpu can be scheduled 4679ed24f4bSMarc Zyngier * @v: The VCPU pointer 4689ed24f4bSMarc Zyngier * 4699ed24f4bSMarc Zyngier * If the guest CPU is not waiting for interrupts or an interrupt line is 4709ed24f4bSMarc Zyngier * asserted, the CPU is by definition runnable. 4719ed24f4bSMarc Zyngier */ 4729ed24f4bSMarc Zyngier int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) 4739ed24f4bSMarc Zyngier { 4749ed24f4bSMarc Zyngier bool irq_lines = *vcpu_hcr(v) & (HCR_VI | HCR_VF); 4759ed24f4bSMarc Zyngier return ((irq_lines || kvm_vgic_vcpu_pending_irq(v)) 4769ed24f4bSMarc Zyngier && !v->arch.power_off && !v->arch.pause); 4779ed24f4bSMarc Zyngier } 4789ed24f4bSMarc Zyngier 4799ed24f4bSMarc Zyngier bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu) 4809ed24f4bSMarc Zyngier { 4819ed24f4bSMarc Zyngier return vcpu_mode_priv(vcpu); 4829ed24f4bSMarc Zyngier } 4839ed24f4bSMarc Zyngier 4849ed24f4bSMarc Zyngier /* Just ensure a guest exit from a particular CPU */ 4859ed24f4bSMarc Zyngier static void exit_vm_noop(void *info) 4869ed24f4bSMarc Zyngier { 4879ed24f4bSMarc Zyngier } 4889ed24f4bSMarc Zyngier 4899ed24f4bSMarc Zyngier void force_vm_exit(const cpumask_t *mask) 4909ed24f4bSMarc Zyngier { 4919ed24f4bSMarc Zyngier preempt_disable(); 4929ed24f4bSMarc Zyngier smp_call_function_many(mask, exit_vm_noop, NULL, true); 4939ed24f4bSMarc Zyngier preempt_enable(); 4949ed24f4bSMarc Zyngier } 4959ed24f4bSMarc Zyngier 4969ed24f4bSMarc Zyngier /** 4979ed24f4bSMarc Zyngier * need_new_vmid_gen - check that the VMID is still valid 4989ed24f4bSMarc Zyngier * @vmid: The VMID to check 4999ed24f4bSMarc Zyngier * 5009ed24f4bSMarc Zyngier * return true if there is a new generation of VMIDs being used 5019ed24f4bSMarc Zyngier * 5029ed24f4bSMarc Zyngier * The hardware supports a limited set of values with the value zero reserved 5039ed24f4bSMarc Zyngier * for the host, so we check if an assigned value belongs to a previous 504656012c7SFuad Tabba * generation, which requires us to assign a new value. If we're the first to 505656012c7SFuad Tabba * use a VMID for the new generation, we must flush necessary caches and TLBs 506656012c7SFuad Tabba * on all CPUs. 5079ed24f4bSMarc Zyngier */ 5089ed24f4bSMarc Zyngier static bool need_new_vmid_gen(struct kvm_vmid *vmid) 5099ed24f4bSMarc Zyngier { 5109ed24f4bSMarc Zyngier u64 current_vmid_gen = atomic64_read(&kvm_vmid_gen); 5119ed24f4bSMarc Zyngier smp_rmb(); /* Orders read of kvm_vmid_gen and kvm->arch.vmid */ 5129ed24f4bSMarc Zyngier return unlikely(READ_ONCE(vmid->vmid_gen) != current_vmid_gen); 5139ed24f4bSMarc Zyngier } 5149ed24f4bSMarc Zyngier 5159ed24f4bSMarc Zyngier /** 5169ed24f4bSMarc Zyngier * update_vmid - Update the vmid with a valid VMID for the current generation 5179ed24f4bSMarc Zyngier * @vmid: The stage-2 VMID information struct 5189ed24f4bSMarc Zyngier */ 5199ed24f4bSMarc Zyngier static void update_vmid(struct kvm_vmid *vmid) 5209ed24f4bSMarc Zyngier { 5219ed24f4bSMarc Zyngier if (!need_new_vmid_gen(vmid)) 5229ed24f4bSMarc Zyngier return; 5239ed24f4bSMarc Zyngier 5249ed24f4bSMarc Zyngier spin_lock(&kvm_vmid_lock); 5259ed24f4bSMarc Zyngier 5269ed24f4bSMarc Zyngier /* 5279ed24f4bSMarc Zyngier * We need to re-check the vmid_gen here to ensure that if another vcpu 5289ed24f4bSMarc Zyngier * already allocated a valid vmid for this vm, then this vcpu should 5299ed24f4bSMarc Zyngier * use the same vmid. 5309ed24f4bSMarc Zyngier */ 5319ed24f4bSMarc Zyngier if (!need_new_vmid_gen(vmid)) { 5329ed24f4bSMarc Zyngier spin_unlock(&kvm_vmid_lock); 5339ed24f4bSMarc Zyngier return; 5349ed24f4bSMarc Zyngier } 5359ed24f4bSMarc Zyngier 5369ed24f4bSMarc Zyngier /* First user of a new VMID generation? */ 5379ed24f4bSMarc Zyngier if (unlikely(kvm_next_vmid == 0)) { 5389ed24f4bSMarc Zyngier atomic64_inc(&kvm_vmid_gen); 5399ed24f4bSMarc Zyngier kvm_next_vmid = 1; 5409ed24f4bSMarc Zyngier 5419ed24f4bSMarc Zyngier /* 5429ed24f4bSMarc Zyngier * On SMP we know no other CPUs can use this CPU's or each 5439ed24f4bSMarc Zyngier * other's VMID after force_vm_exit returns since the 5449ed24f4bSMarc Zyngier * kvm_vmid_lock blocks them from reentry to the guest. 5459ed24f4bSMarc Zyngier */ 5469ed24f4bSMarc Zyngier force_vm_exit(cpu_all_mask); 5479ed24f4bSMarc Zyngier /* 5489ed24f4bSMarc Zyngier * Now broadcast TLB + ICACHE invalidation over the inner 5499ed24f4bSMarc Zyngier * shareable domain to make sure all data structures are 5509ed24f4bSMarc Zyngier * clean. 5519ed24f4bSMarc Zyngier */ 5529ed24f4bSMarc Zyngier kvm_call_hyp(__kvm_flush_vm_context); 5539ed24f4bSMarc Zyngier } 5549ed24f4bSMarc Zyngier 5559ed24f4bSMarc Zyngier vmid->vmid = kvm_next_vmid; 5569ed24f4bSMarc Zyngier kvm_next_vmid++; 5579ed24f4bSMarc Zyngier kvm_next_vmid &= (1 << kvm_get_vmid_bits()) - 1; 5589ed24f4bSMarc Zyngier 5599ed24f4bSMarc Zyngier smp_wmb(); 5609ed24f4bSMarc Zyngier WRITE_ONCE(vmid->vmid_gen, atomic64_read(&kvm_vmid_gen)); 5619ed24f4bSMarc Zyngier 5629ed24f4bSMarc Zyngier spin_unlock(&kvm_vmid_lock); 5639ed24f4bSMarc Zyngier } 5649ed24f4bSMarc Zyngier 5659ed24f4bSMarc Zyngier static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) 5669ed24f4bSMarc Zyngier { 5679ed24f4bSMarc Zyngier struct kvm *kvm = vcpu->kvm; 5689ed24f4bSMarc Zyngier int ret = 0; 5699ed24f4bSMarc Zyngier 5709ed24f4bSMarc Zyngier if (likely(vcpu->arch.has_run_once)) 5719ed24f4bSMarc Zyngier return 0; 5729ed24f4bSMarc Zyngier 5739ed24f4bSMarc Zyngier if (!kvm_arm_vcpu_is_finalized(vcpu)) 5749ed24f4bSMarc Zyngier return -EPERM; 5759ed24f4bSMarc Zyngier 5769ed24f4bSMarc Zyngier vcpu->arch.has_run_once = true; 5779ed24f4bSMarc Zyngier 5789ed24f4bSMarc Zyngier if (likely(irqchip_in_kernel(kvm))) { 5799ed24f4bSMarc Zyngier /* 5809ed24f4bSMarc Zyngier * Map the VGIC hardware resources before running a vcpu the 5819ed24f4bSMarc Zyngier * first time on this VM. 5829ed24f4bSMarc Zyngier */ 5839ed24f4bSMarc Zyngier ret = kvm_vgic_map_resources(kvm); 5849ed24f4bSMarc Zyngier if (ret) 5859ed24f4bSMarc Zyngier return ret; 5869ed24f4bSMarc Zyngier } else { 5879ed24f4bSMarc Zyngier /* 5889ed24f4bSMarc Zyngier * Tell the rest of the code that there are userspace irqchip 5899ed24f4bSMarc Zyngier * VMs in the wild. 5909ed24f4bSMarc Zyngier */ 5919ed24f4bSMarc Zyngier static_branch_inc(&userspace_irqchip_in_use); 5929ed24f4bSMarc Zyngier } 5939ed24f4bSMarc Zyngier 5949ed24f4bSMarc Zyngier ret = kvm_timer_enable(vcpu); 5959ed24f4bSMarc Zyngier if (ret) 5969ed24f4bSMarc Zyngier return ret; 5979ed24f4bSMarc Zyngier 5989ed24f4bSMarc Zyngier ret = kvm_arm_pmu_v3_enable(vcpu); 5999ed24f4bSMarc Zyngier 6009ed24f4bSMarc Zyngier return ret; 6019ed24f4bSMarc Zyngier } 6029ed24f4bSMarc Zyngier 6039ed24f4bSMarc Zyngier bool kvm_arch_intc_initialized(struct kvm *kvm) 6049ed24f4bSMarc Zyngier { 6059ed24f4bSMarc Zyngier return vgic_initialized(kvm); 6069ed24f4bSMarc Zyngier } 6079ed24f4bSMarc Zyngier 6089ed24f4bSMarc Zyngier void kvm_arm_halt_guest(struct kvm *kvm) 6099ed24f4bSMarc Zyngier { 6109ed24f4bSMarc Zyngier int i; 6119ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu; 6129ed24f4bSMarc Zyngier 6139ed24f4bSMarc Zyngier kvm_for_each_vcpu(i, vcpu, kvm) 6149ed24f4bSMarc Zyngier vcpu->arch.pause = true; 6159ed24f4bSMarc Zyngier kvm_make_all_cpus_request(kvm, KVM_REQ_SLEEP); 6169ed24f4bSMarc Zyngier } 6179ed24f4bSMarc Zyngier 6189ed24f4bSMarc Zyngier void kvm_arm_resume_guest(struct kvm *kvm) 6199ed24f4bSMarc Zyngier { 6209ed24f4bSMarc Zyngier int i; 6219ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu; 6229ed24f4bSMarc Zyngier 6239ed24f4bSMarc Zyngier kvm_for_each_vcpu(i, vcpu, kvm) { 6249ed24f4bSMarc Zyngier vcpu->arch.pause = false; 62538060944SPaolo Bonzini rcuwait_wake_up(kvm_arch_vcpu_get_wait(vcpu)); 6269ed24f4bSMarc Zyngier } 6279ed24f4bSMarc Zyngier } 6289ed24f4bSMarc Zyngier 6299ed24f4bSMarc Zyngier static void vcpu_req_sleep(struct kvm_vcpu *vcpu) 6309ed24f4bSMarc Zyngier { 63138060944SPaolo Bonzini struct rcuwait *wait = kvm_arch_vcpu_get_wait(vcpu); 6329ed24f4bSMarc Zyngier 63338060944SPaolo Bonzini rcuwait_wait_event(wait, 63438060944SPaolo Bonzini (!vcpu->arch.power_off) &&(!vcpu->arch.pause), 63538060944SPaolo Bonzini TASK_INTERRUPTIBLE); 6369ed24f4bSMarc Zyngier 6379ed24f4bSMarc Zyngier if (vcpu->arch.power_off || vcpu->arch.pause) { 6389ed24f4bSMarc Zyngier /* Awaken to handle a signal, request we sleep again later. */ 6399ed24f4bSMarc Zyngier kvm_make_request(KVM_REQ_SLEEP, vcpu); 6409ed24f4bSMarc Zyngier } 6419ed24f4bSMarc Zyngier 6429ed24f4bSMarc Zyngier /* 6439ed24f4bSMarc Zyngier * Make sure we will observe a potential reset request if we've 6449ed24f4bSMarc Zyngier * observed a change to the power state. Pairs with the smp_wmb() in 6459ed24f4bSMarc Zyngier * kvm_psci_vcpu_on(). 6469ed24f4bSMarc Zyngier */ 6479ed24f4bSMarc Zyngier smp_rmb(); 6489ed24f4bSMarc Zyngier } 6499ed24f4bSMarc Zyngier 6509ed24f4bSMarc Zyngier static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu) 6519ed24f4bSMarc Zyngier { 6529ed24f4bSMarc Zyngier return vcpu->arch.target >= 0; 6539ed24f4bSMarc Zyngier } 6549ed24f4bSMarc Zyngier 6559ed24f4bSMarc Zyngier static void check_vcpu_requests(struct kvm_vcpu *vcpu) 6569ed24f4bSMarc Zyngier { 6579ed24f4bSMarc Zyngier if (kvm_request_pending(vcpu)) { 6589ed24f4bSMarc Zyngier if (kvm_check_request(KVM_REQ_SLEEP, vcpu)) 6599ed24f4bSMarc Zyngier vcpu_req_sleep(vcpu); 6609ed24f4bSMarc Zyngier 6619ed24f4bSMarc Zyngier if (kvm_check_request(KVM_REQ_VCPU_RESET, vcpu)) 6629ed24f4bSMarc Zyngier kvm_reset_vcpu(vcpu); 6639ed24f4bSMarc Zyngier 6649ed24f4bSMarc Zyngier /* 6659ed24f4bSMarc Zyngier * Clear IRQ_PENDING requests that were made to guarantee 6669ed24f4bSMarc Zyngier * that a VCPU sees new virtual interrupts. 6679ed24f4bSMarc Zyngier */ 6689ed24f4bSMarc Zyngier kvm_check_request(KVM_REQ_IRQ_PENDING, vcpu); 6699ed24f4bSMarc Zyngier 6709ed24f4bSMarc Zyngier if (kvm_check_request(KVM_REQ_RECORD_STEAL, vcpu)) 6719ed24f4bSMarc Zyngier kvm_update_stolen_time(vcpu); 6729ed24f4bSMarc Zyngier 6739ed24f4bSMarc Zyngier if (kvm_check_request(KVM_REQ_RELOAD_GICv4, vcpu)) { 6749ed24f4bSMarc Zyngier /* The distributor enable bits were changed */ 6759ed24f4bSMarc Zyngier preempt_disable(); 6769ed24f4bSMarc Zyngier vgic_v4_put(vcpu, false); 6779ed24f4bSMarc Zyngier vgic_v4_load(vcpu); 6789ed24f4bSMarc Zyngier preempt_enable(); 6799ed24f4bSMarc Zyngier } 6809ed24f4bSMarc Zyngier } 6819ed24f4bSMarc Zyngier } 6829ed24f4bSMarc Zyngier 6839ed24f4bSMarc Zyngier /** 6849ed24f4bSMarc Zyngier * kvm_arch_vcpu_ioctl_run - the main VCPU run function to execute guest code 6859ed24f4bSMarc Zyngier * @vcpu: The VCPU pointer 6869ed24f4bSMarc Zyngier * 6879ed24f4bSMarc Zyngier * This function is called through the VCPU_RUN ioctl called from user space. It 6889ed24f4bSMarc Zyngier * will execute VM code in a loop until the time slice for the process is used 6899ed24f4bSMarc Zyngier * or some emulation is needed from user space in which case the function will 6909ed24f4bSMarc Zyngier * return with return value 0 and with the kvm_run structure filled in with the 6919ed24f4bSMarc Zyngier * required data for the requested emulation. 6929ed24f4bSMarc Zyngier */ 69338060944SPaolo Bonzini int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) 6949ed24f4bSMarc Zyngier { 69538060944SPaolo Bonzini struct kvm_run *run = vcpu->run; 6969ed24f4bSMarc Zyngier int ret; 6979ed24f4bSMarc Zyngier 6989ed24f4bSMarc Zyngier if (unlikely(!kvm_vcpu_initialized(vcpu))) 6999ed24f4bSMarc Zyngier return -ENOEXEC; 7009ed24f4bSMarc Zyngier 7019ed24f4bSMarc Zyngier ret = kvm_vcpu_first_run_init(vcpu); 7029ed24f4bSMarc Zyngier if (ret) 7039ed24f4bSMarc Zyngier return ret; 7049ed24f4bSMarc Zyngier 7059ed24f4bSMarc Zyngier if (run->exit_reason == KVM_EXIT_MMIO) { 70674cc7e0cSTianjia Zhang ret = kvm_handle_mmio_return(vcpu); 7079ed24f4bSMarc Zyngier if (ret) 7089ed24f4bSMarc Zyngier return ret; 7099ed24f4bSMarc Zyngier } 7109ed24f4bSMarc Zyngier 7119ed24f4bSMarc Zyngier if (run->immediate_exit) 7129ed24f4bSMarc Zyngier return -EINTR; 7139ed24f4bSMarc Zyngier 7149ed24f4bSMarc Zyngier vcpu_load(vcpu); 7159ed24f4bSMarc Zyngier 7169ed24f4bSMarc Zyngier kvm_sigset_activate(vcpu); 7179ed24f4bSMarc Zyngier 7189ed24f4bSMarc Zyngier ret = 1; 7199ed24f4bSMarc Zyngier run->exit_reason = KVM_EXIT_UNKNOWN; 7209ed24f4bSMarc Zyngier while (ret > 0) { 7219ed24f4bSMarc Zyngier /* 7229ed24f4bSMarc Zyngier * Check conditions before entering the guest 7239ed24f4bSMarc Zyngier */ 7249ed24f4bSMarc Zyngier cond_resched(); 7259ed24f4bSMarc Zyngier 726a0e50aa3SChristoffer Dall update_vmid(&vcpu->arch.hw_mmu->vmid); 7279ed24f4bSMarc Zyngier 7289ed24f4bSMarc Zyngier check_vcpu_requests(vcpu); 7299ed24f4bSMarc Zyngier 7309ed24f4bSMarc Zyngier /* 7319ed24f4bSMarc Zyngier * Preparing the interrupts to be injected also 7329ed24f4bSMarc Zyngier * involves poking the GIC, which must be done in a 7339ed24f4bSMarc Zyngier * non-preemptible context. 7349ed24f4bSMarc Zyngier */ 7359ed24f4bSMarc Zyngier preempt_disable(); 7369ed24f4bSMarc Zyngier 7379ed24f4bSMarc Zyngier kvm_pmu_flush_hwstate(vcpu); 7389ed24f4bSMarc Zyngier 7399ed24f4bSMarc Zyngier local_irq_disable(); 7409ed24f4bSMarc Zyngier 7419ed24f4bSMarc Zyngier kvm_vgic_flush_hwstate(vcpu); 7429ed24f4bSMarc Zyngier 7439ed24f4bSMarc Zyngier /* 7449ed24f4bSMarc Zyngier * Exit if we have a signal pending so that we can deliver the 7459ed24f4bSMarc Zyngier * signal to user space. 7469ed24f4bSMarc Zyngier */ 7479ed24f4bSMarc Zyngier if (signal_pending(current)) { 7489ed24f4bSMarc Zyngier ret = -EINTR; 7499ed24f4bSMarc Zyngier run->exit_reason = KVM_EXIT_INTR; 7509ed24f4bSMarc Zyngier } 7519ed24f4bSMarc Zyngier 7529ed24f4bSMarc Zyngier /* 7539ed24f4bSMarc Zyngier * If we're using a userspace irqchip, then check if we need 7549ed24f4bSMarc Zyngier * to tell a userspace irqchip about timer or PMU level 7559ed24f4bSMarc Zyngier * changes and if so, exit to userspace (the actual level 7569ed24f4bSMarc Zyngier * state gets updated in kvm_timer_update_run and 7579ed24f4bSMarc Zyngier * kvm_pmu_update_run below). 7589ed24f4bSMarc Zyngier */ 7599ed24f4bSMarc Zyngier if (static_branch_unlikely(&userspace_irqchip_in_use)) { 7609ed24f4bSMarc Zyngier if (kvm_timer_should_notify_user(vcpu) || 7619ed24f4bSMarc Zyngier kvm_pmu_should_notify_user(vcpu)) { 7629ed24f4bSMarc Zyngier ret = -EINTR; 7639ed24f4bSMarc Zyngier run->exit_reason = KVM_EXIT_INTR; 7649ed24f4bSMarc Zyngier } 7659ed24f4bSMarc Zyngier } 7669ed24f4bSMarc Zyngier 7679ed24f4bSMarc Zyngier /* 7689ed24f4bSMarc Zyngier * Ensure we set mode to IN_GUEST_MODE after we disable 7699ed24f4bSMarc Zyngier * interrupts and before the final VCPU requests check. 7709ed24f4bSMarc Zyngier * See the comment in kvm_vcpu_exiting_guest_mode() and 7719ed24f4bSMarc Zyngier * Documentation/virt/kvm/vcpu-requests.rst 7729ed24f4bSMarc Zyngier */ 7739ed24f4bSMarc Zyngier smp_store_mb(vcpu->mode, IN_GUEST_MODE); 7749ed24f4bSMarc Zyngier 775a0e50aa3SChristoffer Dall if (ret <= 0 || need_new_vmid_gen(&vcpu->arch.hw_mmu->vmid) || 7769ed24f4bSMarc Zyngier kvm_request_pending(vcpu)) { 7779ed24f4bSMarc Zyngier vcpu->mode = OUTSIDE_GUEST_MODE; 7789ed24f4bSMarc Zyngier isb(); /* Ensure work in x_flush_hwstate is committed */ 7799ed24f4bSMarc Zyngier kvm_pmu_sync_hwstate(vcpu); 7809ed24f4bSMarc Zyngier if (static_branch_unlikely(&userspace_irqchip_in_use)) 7813c5ff0c6SMarc Zyngier kvm_timer_sync_user(vcpu); 7829ed24f4bSMarc Zyngier kvm_vgic_sync_hwstate(vcpu); 7839ed24f4bSMarc Zyngier local_irq_enable(); 7849ed24f4bSMarc Zyngier preempt_enable(); 7859ed24f4bSMarc Zyngier continue; 7869ed24f4bSMarc Zyngier } 7879ed24f4bSMarc Zyngier 7889ed24f4bSMarc Zyngier kvm_arm_setup_debug(vcpu); 7899ed24f4bSMarc Zyngier 7909ed24f4bSMarc Zyngier /************************************************************** 7919ed24f4bSMarc Zyngier * Enter the guest 7929ed24f4bSMarc Zyngier */ 7939ed24f4bSMarc Zyngier trace_kvm_entry(*vcpu_pc(vcpu)); 7949ed24f4bSMarc Zyngier guest_enter_irqoff(); 7959ed24f4bSMarc Zyngier 79609cf57ebSDavid Brazdil ret = kvm_call_hyp_ret(__kvm_vcpu_run, vcpu); 7979ed24f4bSMarc Zyngier 7989ed24f4bSMarc Zyngier vcpu->mode = OUTSIDE_GUEST_MODE; 7999ed24f4bSMarc Zyngier vcpu->stat.exits++; 8009ed24f4bSMarc Zyngier /* 8019ed24f4bSMarc Zyngier * Back from guest 8029ed24f4bSMarc Zyngier *************************************************************/ 8039ed24f4bSMarc Zyngier 8049ed24f4bSMarc Zyngier kvm_arm_clear_debug(vcpu); 8059ed24f4bSMarc Zyngier 8069ed24f4bSMarc Zyngier /* 8079ed24f4bSMarc Zyngier * We must sync the PMU state before the vgic state so 8089ed24f4bSMarc Zyngier * that the vgic can properly sample the updated state of the 8099ed24f4bSMarc Zyngier * interrupt line. 8109ed24f4bSMarc Zyngier */ 8119ed24f4bSMarc Zyngier kvm_pmu_sync_hwstate(vcpu); 8129ed24f4bSMarc Zyngier 8139ed24f4bSMarc Zyngier /* 8149ed24f4bSMarc Zyngier * Sync the vgic state before syncing the timer state because 8159ed24f4bSMarc Zyngier * the timer code needs to know if the virtual timer 8169ed24f4bSMarc Zyngier * interrupts are active. 8179ed24f4bSMarc Zyngier */ 8189ed24f4bSMarc Zyngier kvm_vgic_sync_hwstate(vcpu); 8199ed24f4bSMarc Zyngier 8209ed24f4bSMarc Zyngier /* 8219ed24f4bSMarc Zyngier * Sync the timer hardware state before enabling interrupts as 8229ed24f4bSMarc Zyngier * we don't want vtimer interrupts to race with syncing the 8239ed24f4bSMarc Zyngier * timer virtual interrupt state. 8249ed24f4bSMarc Zyngier */ 8259ed24f4bSMarc Zyngier if (static_branch_unlikely(&userspace_irqchip_in_use)) 8263c5ff0c6SMarc Zyngier kvm_timer_sync_user(vcpu); 8279ed24f4bSMarc Zyngier 8289ed24f4bSMarc Zyngier kvm_arch_vcpu_ctxsync_fp(vcpu); 8299ed24f4bSMarc Zyngier 8309ed24f4bSMarc Zyngier /* 8319ed24f4bSMarc Zyngier * We may have taken a host interrupt in HYP mode (ie 8329ed24f4bSMarc Zyngier * while executing the guest). This interrupt is still 8339ed24f4bSMarc Zyngier * pending, as we haven't serviced it yet! 8349ed24f4bSMarc Zyngier * 8359ed24f4bSMarc Zyngier * We're now back in SVC mode, with interrupts 8369ed24f4bSMarc Zyngier * disabled. Enabling the interrupts now will have 8379ed24f4bSMarc Zyngier * the effect of taking the interrupt again, in SVC 8389ed24f4bSMarc Zyngier * mode this time. 8399ed24f4bSMarc Zyngier */ 8409ed24f4bSMarc Zyngier local_irq_enable(); 8419ed24f4bSMarc Zyngier 8429ed24f4bSMarc Zyngier /* 8439ed24f4bSMarc Zyngier * We do local_irq_enable() before calling guest_exit() so 8449ed24f4bSMarc Zyngier * that if a timer interrupt hits while running the guest we 8459ed24f4bSMarc Zyngier * account that tick as being spent in the guest. We enable 8469ed24f4bSMarc Zyngier * preemption after calling guest_exit() so that if we get 8479ed24f4bSMarc Zyngier * preempted we make sure ticks after that is not counted as 8489ed24f4bSMarc Zyngier * guest time. 8499ed24f4bSMarc Zyngier */ 8509ed24f4bSMarc Zyngier guest_exit(); 8519ed24f4bSMarc Zyngier trace_kvm_exit(ret, kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu)); 8529ed24f4bSMarc Zyngier 8539ed24f4bSMarc Zyngier /* Exit types that need handling before we can be preempted */ 85474cc7e0cSTianjia Zhang handle_exit_early(vcpu, ret); 8559ed24f4bSMarc Zyngier 8569ed24f4bSMarc Zyngier preempt_enable(); 8579ed24f4bSMarc Zyngier 85822f55384SQais Yousef /* 85922f55384SQais Yousef * The ARMv8 architecture doesn't give the hypervisor 86022f55384SQais Yousef * a mechanism to prevent a guest from dropping to AArch32 EL0 86122f55384SQais Yousef * if implemented by the CPU. If we spot the guest in such 86222f55384SQais Yousef * state and that we decided it wasn't supposed to do so (like 86322f55384SQais Yousef * with the asymmetric AArch32 case), return to userspace with 86422f55384SQais Yousef * a fatal error. 86522f55384SQais Yousef */ 86622f55384SQais Yousef if (!system_supports_32bit_el0() && vcpu_mode_is_32bit(vcpu)) { 86722f55384SQais Yousef /* 86822f55384SQais Yousef * As we have caught the guest red-handed, decide that 86922f55384SQais Yousef * it isn't fit for purpose anymore by making the vcpu 87022f55384SQais Yousef * invalid. The VMM can try and fix it by issuing a 87122f55384SQais Yousef * KVM_ARM_VCPU_INIT if it really wants to. 87222f55384SQais Yousef */ 87322f55384SQais Yousef vcpu->arch.target = -1; 87422f55384SQais Yousef ret = ARM_EXCEPTION_IL; 87522f55384SQais Yousef } 87622f55384SQais Yousef 87774cc7e0cSTianjia Zhang ret = handle_exit(vcpu, ret); 8789ed24f4bSMarc Zyngier } 8799ed24f4bSMarc Zyngier 8809ed24f4bSMarc Zyngier /* Tell userspace about in-kernel device output levels */ 8819ed24f4bSMarc Zyngier if (unlikely(!irqchip_in_kernel(vcpu->kvm))) { 8829ed24f4bSMarc Zyngier kvm_timer_update_run(vcpu); 8839ed24f4bSMarc Zyngier kvm_pmu_update_run(vcpu); 8849ed24f4bSMarc Zyngier } 8859ed24f4bSMarc Zyngier 8869ed24f4bSMarc Zyngier kvm_sigset_deactivate(vcpu); 8879ed24f4bSMarc Zyngier 8889ed24f4bSMarc Zyngier vcpu_put(vcpu); 8899ed24f4bSMarc Zyngier return ret; 8909ed24f4bSMarc Zyngier } 8919ed24f4bSMarc Zyngier 8929ed24f4bSMarc Zyngier static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level) 8939ed24f4bSMarc Zyngier { 8949ed24f4bSMarc Zyngier int bit_index; 8959ed24f4bSMarc Zyngier bool set; 8969ed24f4bSMarc Zyngier unsigned long *hcr; 8979ed24f4bSMarc Zyngier 8989ed24f4bSMarc Zyngier if (number == KVM_ARM_IRQ_CPU_IRQ) 8999ed24f4bSMarc Zyngier bit_index = __ffs(HCR_VI); 9009ed24f4bSMarc Zyngier else /* KVM_ARM_IRQ_CPU_FIQ */ 9019ed24f4bSMarc Zyngier bit_index = __ffs(HCR_VF); 9029ed24f4bSMarc Zyngier 9039ed24f4bSMarc Zyngier hcr = vcpu_hcr(vcpu); 9049ed24f4bSMarc Zyngier if (level) 9059ed24f4bSMarc Zyngier set = test_and_set_bit(bit_index, hcr); 9069ed24f4bSMarc Zyngier else 9079ed24f4bSMarc Zyngier set = test_and_clear_bit(bit_index, hcr); 9089ed24f4bSMarc Zyngier 9099ed24f4bSMarc Zyngier /* 9109ed24f4bSMarc Zyngier * If we didn't change anything, no need to wake up or kick other CPUs 9119ed24f4bSMarc Zyngier */ 9129ed24f4bSMarc Zyngier if (set == level) 9139ed24f4bSMarc Zyngier return 0; 9149ed24f4bSMarc Zyngier 9159ed24f4bSMarc Zyngier /* 9169ed24f4bSMarc Zyngier * The vcpu irq_lines field was updated, wake up sleeping VCPUs and 9179ed24f4bSMarc Zyngier * trigger a world-switch round on the running physical CPU to set the 9189ed24f4bSMarc Zyngier * virtual IRQ/FIQ fields in the HCR appropriately. 9199ed24f4bSMarc Zyngier */ 9209ed24f4bSMarc Zyngier kvm_make_request(KVM_REQ_IRQ_PENDING, vcpu); 9219ed24f4bSMarc Zyngier kvm_vcpu_kick(vcpu); 9229ed24f4bSMarc Zyngier 9239ed24f4bSMarc Zyngier return 0; 9249ed24f4bSMarc Zyngier } 9259ed24f4bSMarc Zyngier 9269ed24f4bSMarc Zyngier int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, 9279ed24f4bSMarc Zyngier bool line_status) 9289ed24f4bSMarc Zyngier { 9299ed24f4bSMarc Zyngier u32 irq = irq_level->irq; 9309ed24f4bSMarc Zyngier unsigned int irq_type, vcpu_idx, irq_num; 9319ed24f4bSMarc Zyngier int nrcpus = atomic_read(&kvm->online_vcpus); 9329ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu = NULL; 9339ed24f4bSMarc Zyngier bool level = irq_level->level; 9349ed24f4bSMarc Zyngier 9359ed24f4bSMarc Zyngier irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK; 9369ed24f4bSMarc Zyngier vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK; 9379ed24f4bSMarc Zyngier vcpu_idx += ((irq >> KVM_ARM_IRQ_VCPU2_SHIFT) & KVM_ARM_IRQ_VCPU2_MASK) * (KVM_ARM_IRQ_VCPU_MASK + 1); 9389ed24f4bSMarc Zyngier irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK; 9399ed24f4bSMarc Zyngier 9409ed24f4bSMarc Zyngier trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level); 9419ed24f4bSMarc Zyngier 9429ed24f4bSMarc Zyngier switch (irq_type) { 9439ed24f4bSMarc Zyngier case KVM_ARM_IRQ_TYPE_CPU: 9449ed24f4bSMarc Zyngier if (irqchip_in_kernel(kvm)) 9459ed24f4bSMarc Zyngier return -ENXIO; 9469ed24f4bSMarc Zyngier 9479ed24f4bSMarc Zyngier if (vcpu_idx >= nrcpus) 9489ed24f4bSMarc Zyngier return -EINVAL; 9499ed24f4bSMarc Zyngier 9509ed24f4bSMarc Zyngier vcpu = kvm_get_vcpu(kvm, vcpu_idx); 9519ed24f4bSMarc Zyngier if (!vcpu) 9529ed24f4bSMarc Zyngier return -EINVAL; 9539ed24f4bSMarc Zyngier 9549ed24f4bSMarc Zyngier if (irq_num > KVM_ARM_IRQ_CPU_FIQ) 9559ed24f4bSMarc Zyngier return -EINVAL; 9569ed24f4bSMarc Zyngier 9579ed24f4bSMarc Zyngier return vcpu_interrupt_line(vcpu, irq_num, level); 9589ed24f4bSMarc Zyngier case KVM_ARM_IRQ_TYPE_PPI: 9599ed24f4bSMarc Zyngier if (!irqchip_in_kernel(kvm)) 9609ed24f4bSMarc Zyngier return -ENXIO; 9619ed24f4bSMarc Zyngier 9629ed24f4bSMarc Zyngier if (vcpu_idx >= nrcpus) 9639ed24f4bSMarc Zyngier return -EINVAL; 9649ed24f4bSMarc Zyngier 9659ed24f4bSMarc Zyngier vcpu = kvm_get_vcpu(kvm, vcpu_idx); 9669ed24f4bSMarc Zyngier if (!vcpu) 9679ed24f4bSMarc Zyngier return -EINVAL; 9689ed24f4bSMarc Zyngier 9699ed24f4bSMarc Zyngier if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS) 9709ed24f4bSMarc Zyngier return -EINVAL; 9719ed24f4bSMarc Zyngier 9729ed24f4bSMarc Zyngier return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level, NULL); 9739ed24f4bSMarc Zyngier case KVM_ARM_IRQ_TYPE_SPI: 9749ed24f4bSMarc Zyngier if (!irqchip_in_kernel(kvm)) 9759ed24f4bSMarc Zyngier return -ENXIO; 9769ed24f4bSMarc Zyngier 9779ed24f4bSMarc Zyngier if (irq_num < VGIC_NR_PRIVATE_IRQS) 9789ed24f4bSMarc Zyngier return -EINVAL; 9799ed24f4bSMarc Zyngier 9809ed24f4bSMarc Zyngier return kvm_vgic_inject_irq(kvm, 0, irq_num, level, NULL); 9819ed24f4bSMarc Zyngier } 9829ed24f4bSMarc Zyngier 9839ed24f4bSMarc Zyngier return -EINVAL; 9849ed24f4bSMarc Zyngier } 9859ed24f4bSMarc Zyngier 9869ed24f4bSMarc Zyngier static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, 9879ed24f4bSMarc Zyngier const struct kvm_vcpu_init *init) 9889ed24f4bSMarc Zyngier { 9899ed24f4bSMarc Zyngier unsigned int i, ret; 9909ed24f4bSMarc Zyngier int phys_target = kvm_target_cpu(); 9919ed24f4bSMarc Zyngier 9929ed24f4bSMarc Zyngier if (init->target != phys_target) 9939ed24f4bSMarc Zyngier return -EINVAL; 9949ed24f4bSMarc Zyngier 9959ed24f4bSMarc Zyngier /* 9969ed24f4bSMarc Zyngier * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must 9979ed24f4bSMarc Zyngier * use the same target. 9989ed24f4bSMarc Zyngier */ 9999ed24f4bSMarc Zyngier if (vcpu->arch.target != -1 && vcpu->arch.target != init->target) 10009ed24f4bSMarc Zyngier return -EINVAL; 10019ed24f4bSMarc Zyngier 10029ed24f4bSMarc Zyngier /* -ENOENT for unknown features, -EINVAL for invalid combinations. */ 10039ed24f4bSMarc Zyngier for (i = 0; i < sizeof(init->features) * 8; i++) { 10049ed24f4bSMarc Zyngier bool set = (init->features[i / 32] & (1 << (i % 32))); 10059ed24f4bSMarc Zyngier 10069ed24f4bSMarc Zyngier if (set && i >= KVM_VCPU_MAX_FEATURES) 10079ed24f4bSMarc Zyngier return -ENOENT; 10089ed24f4bSMarc Zyngier 10099ed24f4bSMarc Zyngier /* 10109ed24f4bSMarc Zyngier * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must 10119ed24f4bSMarc Zyngier * use the same feature set. 10129ed24f4bSMarc Zyngier */ 10139ed24f4bSMarc Zyngier if (vcpu->arch.target != -1 && i < KVM_VCPU_MAX_FEATURES && 10149ed24f4bSMarc Zyngier test_bit(i, vcpu->arch.features) != set) 10159ed24f4bSMarc Zyngier return -EINVAL; 10169ed24f4bSMarc Zyngier 10179ed24f4bSMarc Zyngier if (set) 10189ed24f4bSMarc Zyngier set_bit(i, vcpu->arch.features); 10199ed24f4bSMarc Zyngier } 10209ed24f4bSMarc Zyngier 10219ed24f4bSMarc Zyngier vcpu->arch.target = phys_target; 10229ed24f4bSMarc Zyngier 10239ed24f4bSMarc Zyngier /* Now we know what it is, we can reset it. */ 10249ed24f4bSMarc Zyngier ret = kvm_reset_vcpu(vcpu); 10259ed24f4bSMarc Zyngier if (ret) { 10269ed24f4bSMarc Zyngier vcpu->arch.target = -1; 10279ed24f4bSMarc Zyngier bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES); 10289ed24f4bSMarc Zyngier } 10299ed24f4bSMarc Zyngier 10309ed24f4bSMarc Zyngier return ret; 10319ed24f4bSMarc Zyngier } 10329ed24f4bSMarc Zyngier 10339ed24f4bSMarc Zyngier static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, 10349ed24f4bSMarc Zyngier struct kvm_vcpu_init *init) 10359ed24f4bSMarc Zyngier { 10369ed24f4bSMarc Zyngier int ret; 10379ed24f4bSMarc Zyngier 10389ed24f4bSMarc Zyngier ret = kvm_vcpu_set_target(vcpu, init); 10399ed24f4bSMarc Zyngier if (ret) 10409ed24f4bSMarc Zyngier return ret; 10419ed24f4bSMarc Zyngier 10429ed24f4bSMarc Zyngier /* 10439ed24f4bSMarc Zyngier * Ensure a rebooted VM will fault in RAM pages and detect if the 10449ed24f4bSMarc Zyngier * guest MMU is turned off and flush the caches as needed. 1045892713e9SZenghui Yu * 10467ae2f3dbSMarc Zyngier * S2FWB enforces all memory accesses to RAM being cacheable, 10477ae2f3dbSMarc Zyngier * ensuring that the data side is always coherent. We still 10487ae2f3dbSMarc Zyngier * need to invalidate the I-cache though, as FWB does *not* 10497ae2f3dbSMarc Zyngier * imply CTR_EL0.DIC. 10509ed24f4bSMarc Zyngier */ 10517ae2f3dbSMarc Zyngier if (vcpu->arch.has_run_once) { 10527ae2f3dbSMarc Zyngier if (!cpus_have_final_cap(ARM64_HAS_STAGE2_FWB)) 10539ed24f4bSMarc Zyngier stage2_unmap_vm(vcpu->kvm); 10547ae2f3dbSMarc Zyngier else 10557ae2f3dbSMarc Zyngier __flush_icache_all(); 10567ae2f3dbSMarc Zyngier } 10579ed24f4bSMarc Zyngier 10589ed24f4bSMarc Zyngier vcpu_reset_hcr(vcpu); 10599ed24f4bSMarc Zyngier 10609ed24f4bSMarc Zyngier /* 10619ed24f4bSMarc Zyngier * Handle the "start in power-off" case. 10629ed24f4bSMarc Zyngier */ 10639ed24f4bSMarc Zyngier if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features)) 10649ed24f4bSMarc Zyngier vcpu_power_off(vcpu); 10659ed24f4bSMarc Zyngier else 10669ed24f4bSMarc Zyngier vcpu->arch.power_off = false; 10679ed24f4bSMarc Zyngier 10689ed24f4bSMarc Zyngier return 0; 10699ed24f4bSMarc Zyngier } 10709ed24f4bSMarc Zyngier 10719ed24f4bSMarc Zyngier static int kvm_arm_vcpu_set_attr(struct kvm_vcpu *vcpu, 10729ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 10739ed24f4bSMarc Zyngier { 10749ed24f4bSMarc Zyngier int ret = -ENXIO; 10759ed24f4bSMarc Zyngier 10769ed24f4bSMarc Zyngier switch (attr->group) { 10779ed24f4bSMarc Zyngier default: 10789ed24f4bSMarc Zyngier ret = kvm_arm_vcpu_arch_set_attr(vcpu, attr); 10799ed24f4bSMarc Zyngier break; 10809ed24f4bSMarc Zyngier } 10819ed24f4bSMarc Zyngier 10829ed24f4bSMarc Zyngier return ret; 10839ed24f4bSMarc Zyngier } 10849ed24f4bSMarc Zyngier 10859ed24f4bSMarc Zyngier static int kvm_arm_vcpu_get_attr(struct kvm_vcpu *vcpu, 10869ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 10879ed24f4bSMarc Zyngier { 10889ed24f4bSMarc Zyngier int ret = -ENXIO; 10899ed24f4bSMarc Zyngier 10909ed24f4bSMarc Zyngier switch (attr->group) { 10919ed24f4bSMarc Zyngier default: 10929ed24f4bSMarc Zyngier ret = kvm_arm_vcpu_arch_get_attr(vcpu, attr); 10939ed24f4bSMarc Zyngier break; 10949ed24f4bSMarc Zyngier } 10959ed24f4bSMarc Zyngier 10969ed24f4bSMarc Zyngier return ret; 10979ed24f4bSMarc Zyngier } 10989ed24f4bSMarc Zyngier 10999ed24f4bSMarc Zyngier static int kvm_arm_vcpu_has_attr(struct kvm_vcpu *vcpu, 11009ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 11019ed24f4bSMarc Zyngier { 11029ed24f4bSMarc Zyngier int ret = -ENXIO; 11039ed24f4bSMarc Zyngier 11049ed24f4bSMarc Zyngier switch (attr->group) { 11059ed24f4bSMarc Zyngier default: 11069ed24f4bSMarc Zyngier ret = kvm_arm_vcpu_arch_has_attr(vcpu, attr); 11079ed24f4bSMarc Zyngier break; 11089ed24f4bSMarc Zyngier } 11099ed24f4bSMarc Zyngier 11109ed24f4bSMarc Zyngier return ret; 11119ed24f4bSMarc Zyngier } 11129ed24f4bSMarc Zyngier 11139ed24f4bSMarc Zyngier static int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, 11149ed24f4bSMarc Zyngier struct kvm_vcpu_events *events) 11159ed24f4bSMarc Zyngier { 11169ed24f4bSMarc Zyngier memset(events, 0, sizeof(*events)); 11179ed24f4bSMarc Zyngier 11189ed24f4bSMarc Zyngier return __kvm_arm_vcpu_get_events(vcpu, events); 11199ed24f4bSMarc Zyngier } 11209ed24f4bSMarc Zyngier 11219ed24f4bSMarc Zyngier static int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, 11229ed24f4bSMarc Zyngier struct kvm_vcpu_events *events) 11239ed24f4bSMarc Zyngier { 11249ed24f4bSMarc Zyngier int i; 11259ed24f4bSMarc Zyngier 11269ed24f4bSMarc Zyngier /* check whether the reserved field is zero */ 11279ed24f4bSMarc Zyngier for (i = 0; i < ARRAY_SIZE(events->reserved); i++) 11289ed24f4bSMarc Zyngier if (events->reserved[i]) 11299ed24f4bSMarc Zyngier return -EINVAL; 11309ed24f4bSMarc Zyngier 11319ed24f4bSMarc Zyngier /* check whether the pad field is zero */ 11329ed24f4bSMarc Zyngier for (i = 0; i < ARRAY_SIZE(events->exception.pad); i++) 11339ed24f4bSMarc Zyngier if (events->exception.pad[i]) 11349ed24f4bSMarc Zyngier return -EINVAL; 11359ed24f4bSMarc Zyngier 11369ed24f4bSMarc Zyngier return __kvm_arm_vcpu_set_events(vcpu, events); 11379ed24f4bSMarc Zyngier } 11389ed24f4bSMarc Zyngier 11399ed24f4bSMarc Zyngier long kvm_arch_vcpu_ioctl(struct file *filp, 11409ed24f4bSMarc Zyngier unsigned int ioctl, unsigned long arg) 11419ed24f4bSMarc Zyngier { 11429ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu = filp->private_data; 11439ed24f4bSMarc Zyngier void __user *argp = (void __user *)arg; 11449ed24f4bSMarc Zyngier struct kvm_device_attr attr; 11459ed24f4bSMarc Zyngier long r; 11469ed24f4bSMarc Zyngier 11479ed24f4bSMarc Zyngier switch (ioctl) { 11489ed24f4bSMarc Zyngier case KVM_ARM_VCPU_INIT: { 11499ed24f4bSMarc Zyngier struct kvm_vcpu_init init; 11509ed24f4bSMarc Zyngier 11519ed24f4bSMarc Zyngier r = -EFAULT; 11529ed24f4bSMarc Zyngier if (copy_from_user(&init, argp, sizeof(init))) 11539ed24f4bSMarc Zyngier break; 11549ed24f4bSMarc Zyngier 11559ed24f4bSMarc Zyngier r = kvm_arch_vcpu_ioctl_vcpu_init(vcpu, &init); 11569ed24f4bSMarc Zyngier break; 11579ed24f4bSMarc Zyngier } 11589ed24f4bSMarc Zyngier case KVM_SET_ONE_REG: 11599ed24f4bSMarc Zyngier case KVM_GET_ONE_REG: { 11609ed24f4bSMarc Zyngier struct kvm_one_reg reg; 11619ed24f4bSMarc Zyngier 11629ed24f4bSMarc Zyngier r = -ENOEXEC; 11639ed24f4bSMarc Zyngier if (unlikely(!kvm_vcpu_initialized(vcpu))) 11649ed24f4bSMarc Zyngier break; 11659ed24f4bSMarc Zyngier 11669ed24f4bSMarc Zyngier r = -EFAULT; 11679ed24f4bSMarc Zyngier if (copy_from_user(®, argp, sizeof(reg))) 11689ed24f4bSMarc Zyngier break; 11699ed24f4bSMarc Zyngier 11709ed24f4bSMarc Zyngier if (ioctl == KVM_SET_ONE_REG) 11719ed24f4bSMarc Zyngier r = kvm_arm_set_reg(vcpu, ®); 11729ed24f4bSMarc Zyngier else 11739ed24f4bSMarc Zyngier r = kvm_arm_get_reg(vcpu, ®); 11749ed24f4bSMarc Zyngier break; 11759ed24f4bSMarc Zyngier } 11769ed24f4bSMarc Zyngier case KVM_GET_REG_LIST: { 11779ed24f4bSMarc Zyngier struct kvm_reg_list __user *user_list = argp; 11789ed24f4bSMarc Zyngier struct kvm_reg_list reg_list; 11799ed24f4bSMarc Zyngier unsigned n; 11809ed24f4bSMarc Zyngier 11819ed24f4bSMarc Zyngier r = -ENOEXEC; 11829ed24f4bSMarc Zyngier if (unlikely(!kvm_vcpu_initialized(vcpu))) 11839ed24f4bSMarc Zyngier break; 11849ed24f4bSMarc Zyngier 11859ed24f4bSMarc Zyngier r = -EPERM; 11869ed24f4bSMarc Zyngier if (!kvm_arm_vcpu_is_finalized(vcpu)) 11879ed24f4bSMarc Zyngier break; 11889ed24f4bSMarc Zyngier 11899ed24f4bSMarc Zyngier r = -EFAULT; 11909ed24f4bSMarc Zyngier if (copy_from_user(®_list, user_list, sizeof(reg_list))) 11919ed24f4bSMarc Zyngier break; 11929ed24f4bSMarc Zyngier n = reg_list.n; 11939ed24f4bSMarc Zyngier reg_list.n = kvm_arm_num_regs(vcpu); 11949ed24f4bSMarc Zyngier if (copy_to_user(user_list, ®_list, sizeof(reg_list))) 11959ed24f4bSMarc Zyngier break; 11969ed24f4bSMarc Zyngier r = -E2BIG; 11979ed24f4bSMarc Zyngier if (n < reg_list.n) 11989ed24f4bSMarc Zyngier break; 11999ed24f4bSMarc Zyngier r = kvm_arm_copy_reg_indices(vcpu, user_list->reg); 12009ed24f4bSMarc Zyngier break; 12019ed24f4bSMarc Zyngier } 12029ed24f4bSMarc Zyngier case KVM_SET_DEVICE_ATTR: { 12039ed24f4bSMarc Zyngier r = -EFAULT; 12049ed24f4bSMarc Zyngier if (copy_from_user(&attr, argp, sizeof(attr))) 12059ed24f4bSMarc Zyngier break; 12069ed24f4bSMarc Zyngier r = kvm_arm_vcpu_set_attr(vcpu, &attr); 12079ed24f4bSMarc Zyngier break; 12089ed24f4bSMarc Zyngier } 12099ed24f4bSMarc Zyngier case KVM_GET_DEVICE_ATTR: { 12109ed24f4bSMarc Zyngier r = -EFAULT; 12119ed24f4bSMarc Zyngier if (copy_from_user(&attr, argp, sizeof(attr))) 12129ed24f4bSMarc Zyngier break; 12139ed24f4bSMarc Zyngier r = kvm_arm_vcpu_get_attr(vcpu, &attr); 12149ed24f4bSMarc Zyngier break; 12159ed24f4bSMarc Zyngier } 12169ed24f4bSMarc Zyngier case KVM_HAS_DEVICE_ATTR: { 12179ed24f4bSMarc Zyngier r = -EFAULT; 12189ed24f4bSMarc Zyngier if (copy_from_user(&attr, argp, sizeof(attr))) 12199ed24f4bSMarc Zyngier break; 12209ed24f4bSMarc Zyngier r = kvm_arm_vcpu_has_attr(vcpu, &attr); 12219ed24f4bSMarc Zyngier break; 12229ed24f4bSMarc Zyngier } 12239ed24f4bSMarc Zyngier case KVM_GET_VCPU_EVENTS: { 12249ed24f4bSMarc Zyngier struct kvm_vcpu_events events; 12259ed24f4bSMarc Zyngier 12269ed24f4bSMarc Zyngier if (kvm_arm_vcpu_get_events(vcpu, &events)) 12279ed24f4bSMarc Zyngier return -EINVAL; 12289ed24f4bSMarc Zyngier 12299ed24f4bSMarc Zyngier if (copy_to_user(argp, &events, sizeof(events))) 12309ed24f4bSMarc Zyngier return -EFAULT; 12319ed24f4bSMarc Zyngier 12329ed24f4bSMarc Zyngier return 0; 12339ed24f4bSMarc Zyngier } 12349ed24f4bSMarc Zyngier case KVM_SET_VCPU_EVENTS: { 12359ed24f4bSMarc Zyngier struct kvm_vcpu_events events; 12369ed24f4bSMarc Zyngier 12379ed24f4bSMarc Zyngier if (copy_from_user(&events, argp, sizeof(events))) 12389ed24f4bSMarc Zyngier return -EFAULT; 12399ed24f4bSMarc Zyngier 12409ed24f4bSMarc Zyngier return kvm_arm_vcpu_set_events(vcpu, &events); 12419ed24f4bSMarc Zyngier } 12429ed24f4bSMarc Zyngier case KVM_ARM_VCPU_FINALIZE: { 12439ed24f4bSMarc Zyngier int what; 12449ed24f4bSMarc Zyngier 12459ed24f4bSMarc Zyngier if (!kvm_vcpu_initialized(vcpu)) 12469ed24f4bSMarc Zyngier return -ENOEXEC; 12479ed24f4bSMarc Zyngier 12489ed24f4bSMarc Zyngier if (get_user(what, (const int __user *)argp)) 12499ed24f4bSMarc Zyngier return -EFAULT; 12509ed24f4bSMarc Zyngier 12519ed24f4bSMarc Zyngier return kvm_arm_vcpu_finalize(vcpu, what); 12529ed24f4bSMarc Zyngier } 12539ed24f4bSMarc Zyngier default: 12549ed24f4bSMarc Zyngier r = -EINVAL; 12559ed24f4bSMarc Zyngier } 12569ed24f4bSMarc Zyngier 12579ed24f4bSMarc Zyngier return r; 12589ed24f4bSMarc Zyngier } 12599ed24f4bSMarc Zyngier 12609ed24f4bSMarc Zyngier void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot) 12619ed24f4bSMarc Zyngier { 12629ed24f4bSMarc Zyngier 12639ed24f4bSMarc Zyngier } 12649ed24f4bSMarc Zyngier 12659ed24f4bSMarc Zyngier void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm, 12669ed24f4bSMarc Zyngier struct kvm_memory_slot *memslot) 12679ed24f4bSMarc Zyngier { 12689ed24f4bSMarc Zyngier kvm_flush_remote_tlbs(kvm); 12699ed24f4bSMarc Zyngier } 12709ed24f4bSMarc Zyngier 12719ed24f4bSMarc Zyngier static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm, 12729ed24f4bSMarc Zyngier struct kvm_arm_device_addr *dev_addr) 12739ed24f4bSMarc Zyngier { 12749ed24f4bSMarc Zyngier unsigned long dev_id, type; 12759ed24f4bSMarc Zyngier 12769ed24f4bSMarc Zyngier dev_id = (dev_addr->id & KVM_ARM_DEVICE_ID_MASK) >> 12779ed24f4bSMarc Zyngier KVM_ARM_DEVICE_ID_SHIFT; 12789ed24f4bSMarc Zyngier type = (dev_addr->id & KVM_ARM_DEVICE_TYPE_MASK) >> 12799ed24f4bSMarc Zyngier KVM_ARM_DEVICE_TYPE_SHIFT; 12809ed24f4bSMarc Zyngier 12819ed24f4bSMarc Zyngier switch (dev_id) { 12829ed24f4bSMarc Zyngier case KVM_ARM_DEVICE_VGIC_V2: 12839ed24f4bSMarc Zyngier if (!vgic_present) 12849ed24f4bSMarc Zyngier return -ENXIO; 12859ed24f4bSMarc Zyngier return kvm_vgic_addr(kvm, type, &dev_addr->addr, true); 12869ed24f4bSMarc Zyngier default: 12879ed24f4bSMarc Zyngier return -ENODEV; 12889ed24f4bSMarc Zyngier } 12899ed24f4bSMarc Zyngier } 12909ed24f4bSMarc Zyngier 12919ed24f4bSMarc Zyngier long kvm_arch_vm_ioctl(struct file *filp, 12929ed24f4bSMarc Zyngier unsigned int ioctl, unsigned long arg) 12939ed24f4bSMarc Zyngier { 12949ed24f4bSMarc Zyngier struct kvm *kvm = filp->private_data; 12959ed24f4bSMarc Zyngier void __user *argp = (void __user *)arg; 12969ed24f4bSMarc Zyngier 12979ed24f4bSMarc Zyngier switch (ioctl) { 12989ed24f4bSMarc Zyngier case KVM_CREATE_IRQCHIP: { 12999ed24f4bSMarc Zyngier int ret; 13009ed24f4bSMarc Zyngier if (!vgic_present) 13019ed24f4bSMarc Zyngier return -ENXIO; 13029ed24f4bSMarc Zyngier mutex_lock(&kvm->lock); 13039ed24f4bSMarc Zyngier ret = kvm_vgic_create(kvm, KVM_DEV_TYPE_ARM_VGIC_V2); 13049ed24f4bSMarc Zyngier mutex_unlock(&kvm->lock); 13059ed24f4bSMarc Zyngier return ret; 13069ed24f4bSMarc Zyngier } 13079ed24f4bSMarc Zyngier case KVM_ARM_SET_DEVICE_ADDR: { 13089ed24f4bSMarc Zyngier struct kvm_arm_device_addr dev_addr; 13099ed24f4bSMarc Zyngier 13109ed24f4bSMarc Zyngier if (copy_from_user(&dev_addr, argp, sizeof(dev_addr))) 13119ed24f4bSMarc Zyngier return -EFAULT; 13129ed24f4bSMarc Zyngier return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr); 13139ed24f4bSMarc Zyngier } 13149ed24f4bSMarc Zyngier case KVM_ARM_PREFERRED_TARGET: { 13159ed24f4bSMarc Zyngier int err; 13169ed24f4bSMarc Zyngier struct kvm_vcpu_init init; 13179ed24f4bSMarc Zyngier 13189ed24f4bSMarc Zyngier err = kvm_vcpu_preferred_target(&init); 13199ed24f4bSMarc Zyngier if (err) 13209ed24f4bSMarc Zyngier return err; 13219ed24f4bSMarc Zyngier 13229ed24f4bSMarc Zyngier if (copy_to_user(argp, &init, sizeof(init))) 13239ed24f4bSMarc Zyngier return -EFAULT; 13249ed24f4bSMarc Zyngier 13259ed24f4bSMarc Zyngier return 0; 13269ed24f4bSMarc Zyngier } 13279ed24f4bSMarc Zyngier default: 13289ed24f4bSMarc Zyngier return -EINVAL; 13299ed24f4bSMarc Zyngier } 13309ed24f4bSMarc Zyngier } 13319ed24f4bSMarc Zyngier 133230c95391SDavid Brazdil static unsigned long nvhe_percpu_size(void) 133330c95391SDavid Brazdil { 133430c95391SDavid Brazdil return (unsigned long)CHOOSE_NVHE_SYM(__per_cpu_end) - 133530c95391SDavid Brazdil (unsigned long)CHOOSE_NVHE_SYM(__per_cpu_start); 133630c95391SDavid Brazdil } 133730c95391SDavid Brazdil 133830c95391SDavid Brazdil static unsigned long nvhe_percpu_order(void) 133930c95391SDavid Brazdil { 134030c95391SDavid Brazdil unsigned long size = nvhe_percpu_size(); 134130c95391SDavid Brazdil 134230c95391SDavid Brazdil return size ? get_order(size) : 0; 134330c95391SDavid Brazdil } 134430c95391SDavid Brazdil 1345b881cdceSWill Deacon /* A lookup table holding the hypervisor VA for each vector slot */ 1346b881cdceSWill Deacon static void *hyp_spectre_vector_selector[BP_HARDEN_EL2_SLOTS]; 1347de5bcdb4SWill Deacon 13484f6a36feSWill Deacon static int __kvm_vector_slot2idx(enum arm64_hyp_spectre_vector slot) 13499ef2b48bSWill Deacon { 13504f6a36feSWill Deacon return slot - (slot != HYP_VECTOR_DIRECT); 13519ef2b48bSWill Deacon } 13529ef2b48bSWill Deacon 1353b881cdceSWill Deacon static void kvm_init_vector_slot(void *base, enum arm64_hyp_spectre_vector slot) 1354b881cdceSWill Deacon { 13554f6a36feSWill Deacon int idx = __kvm_vector_slot2idx(slot); 13569ef2b48bSWill Deacon 13574f6a36feSWill Deacon hyp_spectre_vector_selector[slot] = base + (idx * SZ_2K); 13589ef2b48bSWill Deacon } 13599ef2b48bSWill Deacon 1360b881cdceSWill Deacon static int kvm_init_vector_slots(void) 1361b881cdceSWill Deacon { 1362b881cdceSWill Deacon int err; 1363b881cdceSWill Deacon void *base; 1364b881cdceSWill Deacon 1365b881cdceSWill Deacon base = kern_hyp_va(kvm_ksym_ref(__kvm_hyp_vector)); 1366b881cdceSWill Deacon kvm_init_vector_slot(base, HYP_VECTOR_DIRECT); 1367b881cdceSWill Deacon 1368b881cdceSWill Deacon base = kern_hyp_va(kvm_ksym_ref(__bp_harden_hyp_vecs)); 1369b881cdceSWill Deacon kvm_init_vector_slot(base, HYP_VECTOR_SPECTRE_DIRECT); 1370b881cdceSWill Deacon 1371c4792b6dSWill Deacon if (!cpus_have_const_cap(ARM64_SPECTRE_V3A)) 1372de5bcdb4SWill Deacon return 0; 13739ef2b48bSWill Deacon 1374b881cdceSWill Deacon if (!has_vhe()) { 1375b881cdceSWill Deacon err = create_hyp_exec_mappings(__pa_symbol(__bp_harden_hyp_vecs), 1376b881cdceSWill Deacon __BP_HARDEN_HYP_VECS_SZ, &base); 1377b881cdceSWill Deacon if (err) 1378b881cdceSWill Deacon return err; 1379b881cdceSWill Deacon } 13809ef2b48bSWill Deacon 1381b881cdceSWill Deacon kvm_init_vector_slot(base, HYP_VECTOR_INDIRECT); 1382b881cdceSWill Deacon kvm_init_vector_slot(base, HYP_VECTOR_SPECTRE_INDIRECT); 13839ef2b48bSWill Deacon return 0; 13849ef2b48bSWill Deacon } 13859ef2b48bSWill Deacon 13869ed24f4bSMarc Zyngier static void cpu_init_hyp_mode(void) 13879ed24f4bSMarc Zyngier { 138863fec243SDavid Brazdil struct kvm_nvhe_init_params *params = this_cpu_ptr_nvhe_sym(kvm_init_params); 138904e4caa8SAndrew Scull struct arm_smccc_res res; 1390d3e1086cSDavid Brazdil unsigned long tcr; 13919ed24f4bSMarc Zyngier 13929ed24f4bSMarc Zyngier /* Switch from the HYP stub to our own HYP init vector */ 13939ed24f4bSMarc Zyngier __hyp_set_vectors(kvm_get_idmap_vector()); 13949ed24f4bSMarc Zyngier 139571b3ec5fSDavid Brazdil /* 139671b3ec5fSDavid Brazdil * Calculate the raw per-cpu offset without a translation from the 139771b3ec5fSDavid Brazdil * kernel's mapping to the linear mapping, and store it in tpidr_el2 139871b3ec5fSDavid Brazdil * so that we can use adr_l to access per-cpu variables in EL2. 139971b3ec5fSDavid Brazdil */ 140063fec243SDavid Brazdil params->tpidr_el2 = (unsigned long)this_cpu_ptr_nvhe_sym(__per_cpu_start) - 140130c95391SDavid Brazdil (unsigned long)kvm_ksym_ref(CHOOSE_NVHE_SYM(__per_cpu_start)); 140271b3ec5fSDavid Brazdil 1403d3e1086cSDavid Brazdil params->mair_el2 = read_sysreg(mair_el1); 1404d3e1086cSDavid Brazdil 1405d3e1086cSDavid Brazdil /* 1406d3e1086cSDavid Brazdil * The ID map may be configured to use an extended virtual address 1407d3e1086cSDavid Brazdil * range. This is only the case if system RAM is out of range for the 1408d3e1086cSDavid Brazdil * currently configured page size and VA_BITS, in which case we will 1409d3e1086cSDavid Brazdil * also need the extended virtual range for the HYP ID map, or we won't 1410d3e1086cSDavid Brazdil * be able to enable the EL2 MMU. 1411d3e1086cSDavid Brazdil * 1412d3e1086cSDavid Brazdil * However, at EL2, there is only one TTBR register, and we can't switch 1413d3e1086cSDavid Brazdil * between translation tables *and* update TCR_EL2.T0SZ at the same 1414d3e1086cSDavid Brazdil * time. Bottom line: we need to use the extended range with *both* our 1415d3e1086cSDavid Brazdil * translation tables. 1416d3e1086cSDavid Brazdil * 1417d3e1086cSDavid Brazdil * So use the same T0SZ value we use for the ID map. 1418d3e1086cSDavid Brazdil */ 1419d3e1086cSDavid Brazdil tcr = (read_sysreg(tcr_el1) & TCR_EL2_MASK) | TCR_EL2_RES1; 1420d3e1086cSDavid Brazdil tcr &= ~TCR_T0SZ_MASK; 1421d3e1086cSDavid Brazdil tcr |= (idmap_t0sz & GENMASK(TCR_TxSZ_WIDTH - 1, 0)) << TCR_T0SZ_OFFSET; 1422d3e1086cSDavid Brazdil params->tcr_el2 = tcr; 1423d3e1086cSDavid Brazdil 142463fec243SDavid Brazdil params->stack_hyp_va = kern_hyp_va(__this_cpu_read(kvm_arm_hyp_stack_page) + PAGE_SIZE); 142563fec243SDavid Brazdil params->pgd_pa = kvm_mmu_get_httbr(); 142663fec243SDavid Brazdil 142763fec243SDavid Brazdil /* 142863fec243SDavid Brazdil * Flush the init params from the data cache because the struct will 142963fec243SDavid Brazdil * be read while the MMU is off. 143063fec243SDavid Brazdil */ 143163fec243SDavid Brazdil kvm_flush_dcache_to_poc(params, sizeof(*params)); 14329ed24f4bSMarc Zyngier 143371b3ec5fSDavid Brazdil /* 143471b3ec5fSDavid Brazdil * Call initialization code, and switch to the full blown HYP code. 143571b3ec5fSDavid Brazdil * If the cpucaps haven't been finalized yet, something has gone very 143671b3ec5fSDavid Brazdil * wrong, and hyp will crash and burn when it uses any 143771b3ec5fSDavid Brazdil * cpus_have_const_cap() wrapper. 143871b3ec5fSDavid Brazdil */ 143971b3ec5fSDavid Brazdil BUG_ON(!system_capabilities_finalized()); 144063fec243SDavid Brazdil arm_smccc_1_1_hvc(KVM_HOST_SMCCC_FUNC(__kvm_hyp_init), virt_to_phys(params), &res); 144104e4caa8SAndrew Scull WARN_ON(res.a0 != SMCCC_RET_SUCCESS); 144271b3ec5fSDavid Brazdil 144371b3ec5fSDavid Brazdil /* 144471b3ec5fSDavid Brazdil * Disabling SSBD on a non-VHE system requires us to enable SSBS 144571b3ec5fSDavid Brazdil * at EL2. 144671b3ec5fSDavid Brazdil */ 144771b3ec5fSDavid Brazdil if (this_cpu_has_cap(ARM64_SSBS) && 1448d63d975aSMarc Zyngier arm64_get_spectre_v4_state() == SPECTRE_VULNERABLE) { 144913aeb9b4SDavid Brazdil kvm_call_hyp_nvhe(__kvm_enable_ssbs); 145071b3ec5fSDavid Brazdil } 14519ed24f4bSMarc Zyngier } 14529ed24f4bSMarc Zyngier 14539ed24f4bSMarc Zyngier static void cpu_hyp_reset(void) 14549ed24f4bSMarc Zyngier { 14559ed24f4bSMarc Zyngier if (!is_kernel_in_hyp_mode()) 14569ed24f4bSMarc Zyngier __hyp_reset_vectors(); 14579ed24f4bSMarc Zyngier } 14589ed24f4bSMarc Zyngier 1459042c76a9SWill Deacon /* 1460042c76a9SWill Deacon * EL2 vectors can be mapped and rerouted in a number of ways, 1461042c76a9SWill Deacon * depending on the kernel configuration and CPU present: 1462042c76a9SWill Deacon * 1463042c76a9SWill Deacon * - If the CPU is affected by Spectre-v2, the hardening sequence is 1464042c76a9SWill Deacon * placed in one of the vector slots, which is executed before jumping 1465042c76a9SWill Deacon * to the real vectors. 1466042c76a9SWill Deacon * 1467c4792b6dSWill Deacon * - If the CPU also has the ARM64_SPECTRE_V3A cap, the slot 1468042c76a9SWill Deacon * containing the hardening sequence is mapped next to the idmap page, 1469042c76a9SWill Deacon * and executed before jumping to the real vectors. 1470042c76a9SWill Deacon * 1471c4792b6dSWill Deacon * - If the CPU only has the ARM64_SPECTRE_V3A cap, then an 1472042c76a9SWill Deacon * empty slot is selected, mapped next to the idmap page, and 1473042c76a9SWill Deacon * executed before jumping to the real vectors. 1474042c76a9SWill Deacon * 1475c4792b6dSWill Deacon * Note that ARM64_SPECTRE_V3A is somewhat incompatible with 1476042c76a9SWill Deacon * VHE, as we don't have hypervisor-specific mappings. If the system 1477042c76a9SWill Deacon * is VHE and yet selects this capability, it will be ignored. 1478042c76a9SWill Deacon */ 1479042c76a9SWill Deacon static void cpu_set_hyp_vector(void) 1480042c76a9SWill Deacon { 14816279017eSWill Deacon struct bp_hardening_data *data = this_cpu_ptr(&bp_hardening_data); 1482b881cdceSWill Deacon void *vector = hyp_spectre_vector_selector[data->slot]; 1483042c76a9SWill Deacon 1484b881cdceSWill Deacon *this_cpu_ptr_hyp_sym(kvm_hyp_vector) = (unsigned long)vector; 1485042c76a9SWill Deacon } 1486042c76a9SWill Deacon 14879ed24f4bSMarc Zyngier static void cpu_hyp_reinit(void) 14889ed24f4bSMarc Zyngier { 14892a1198c9SDavid Brazdil kvm_init_host_cpu_context(&this_cpu_ptr_hyp_sym(kvm_host_data)->host_ctxt); 14909ed24f4bSMarc Zyngier 14919ed24f4bSMarc Zyngier cpu_hyp_reset(); 1492042c76a9SWill Deacon cpu_set_hyp_vector(); 1493a0e47952SAndrew Scull 14949ed24f4bSMarc Zyngier if (is_kernel_in_hyp_mode()) 14959ed24f4bSMarc Zyngier kvm_timer_init_vhe(); 14969ed24f4bSMarc Zyngier else 14979ed24f4bSMarc Zyngier cpu_init_hyp_mode(); 14989ed24f4bSMarc Zyngier 14999ed24f4bSMarc Zyngier kvm_arm_init_debug(); 15009ed24f4bSMarc Zyngier 15019ed24f4bSMarc Zyngier if (vgic_present) 15029ed24f4bSMarc Zyngier kvm_vgic_init_cpu_hardware(); 15039ed24f4bSMarc Zyngier } 15049ed24f4bSMarc Zyngier 15059ed24f4bSMarc Zyngier static void _kvm_arch_hardware_enable(void *discard) 15069ed24f4bSMarc Zyngier { 15079ed24f4bSMarc Zyngier if (!__this_cpu_read(kvm_arm_hardware_enabled)) { 15089ed24f4bSMarc Zyngier cpu_hyp_reinit(); 15099ed24f4bSMarc Zyngier __this_cpu_write(kvm_arm_hardware_enabled, 1); 15109ed24f4bSMarc Zyngier } 15119ed24f4bSMarc Zyngier } 15129ed24f4bSMarc Zyngier 15139ed24f4bSMarc Zyngier int kvm_arch_hardware_enable(void) 15149ed24f4bSMarc Zyngier { 15159ed24f4bSMarc Zyngier _kvm_arch_hardware_enable(NULL); 15169ed24f4bSMarc Zyngier return 0; 15179ed24f4bSMarc Zyngier } 15189ed24f4bSMarc Zyngier 15199ed24f4bSMarc Zyngier static void _kvm_arch_hardware_disable(void *discard) 15209ed24f4bSMarc Zyngier { 15219ed24f4bSMarc Zyngier if (__this_cpu_read(kvm_arm_hardware_enabled)) { 15229ed24f4bSMarc Zyngier cpu_hyp_reset(); 15239ed24f4bSMarc Zyngier __this_cpu_write(kvm_arm_hardware_enabled, 0); 15249ed24f4bSMarc Zyngier } 15259ed24f4bSMarc Zyngier } 15269ed24f4bSMarc Zyngier 15279ed24f4bSMarc Zyngier void kvm_arch_hardware_disable(void) 15289ed24f4bSMarc Zyngier { 1529fa8c3d65SDavid Brazdil if (!is_protected_kvm_enabled()) 15309ed24f4bSMarc Zyngier _kvm_arch_hardware_disable(NULL); 15319ed24f4bSMarc Zyngier } 15329ed24f4bSMarc Zyngier 15339ed24f4bSMarc Zyngier #ifdef CONFIG_CPU_PM 15349ed24f4bSMarc Zyngier static int hyp_init_cpu_pm_notifier(struct notifier_block *self, 15359ed24f4bSMarc Zyngier unsigned long cmd, 15369ed24f4bSMarc Zyngier void *v) 15379ed24f4bSMarc Zyngier { 15389ed24f4bSMarc Zyngier /* 15399ed24f4bSMarc Zyngier * kvm_arm_hardware_enabled is left with its old value over 15409ed24f4bSMarc Zyngier * PM_ENTER->PM_EXIT. It is used to indicate PM_EXIT should 15419ed24f4bSMarc Zyngier * re-enable hyp. 15429ed24f4bSMarc Zyngier */ 15439ed24f4bSMarc Zyngier switch (cmd) { 15449ed24f4bSMarc Zyngier case CPU_PM_ENTER: 15459ed24f4bSMarc Zyngier if (__this_cpu_read(kvm_arm_hardware_enabled)) 15469ed24f4bSMarc Zyngier /* 15479ed24f4bSMarc Zyngier * don't update kvm_arm_hardware_enabled here 15489ed24f4bSMarc Zyngier * so that the hardware will be re-enabled 15499ed24f4bSMarc Zyngier * when we resume. See below. 15509ed24f4bSMarc Zyngier */ 15519ed24f4bSMarc Zyngier cpu_hyp_reset(); 15529ed24f4bSMarc Zyngier 15539ed24f4bSMarc Zyngier return NOTIFY_OK; 15549ed24f4bSMarc Zyngier case CPU_PM_ENTER_FAILED: 15559ed24f4bSMarc Zyngier case CPU_PM_EXIT: 15569ed24f4bSMarc Zyngier if (__this_cpu_read(kvm_arm_hardware_enabled)) 15579ed24f4bSMarc Zyngier /* The hardware was enabled before suspend. */ 15589ed24f4bSMarc Zyngier cpu_hyp_reinit(); 15599ed24f4bSMarc Zyngier 15609ed24f4bSMarc Zyngier return NOTIFY_OK; 15619ed24f4bSMarc Zyngier 15629ed24f4bSMarc Zyngier default: 15639ed24f4bSMarc Zyngier return NOTIFY_DONE; 15649ed24f4bSMarc Zyngier } 15659ed24f4bSMarc Zyngier } 15669ed24f4bSMarc Zyngier 15679ed24f4bSMarc Zyngier static struct notifier_block hyp_init_cpu_pm_nb = { 15689ed24f4bSMarc Zyngier .notifier_call = hyp_init_cpu_pm_notifier, 15699ed24f4bSMarc Zyngier }; 15709ed24f4bSMarc Zyngier 157144362a3cSMarc Zyngier static void hyp_cpu_pm_init(void) 15729ed24f4bSMarc Zyngier { 1573fa8c3d65SDavid Brazdil if (!is_protected_kvm_enabled()) 15749ed24f4bSMarc Zyngier cpu_pm_register_notifier(&hyp_init_cpu_pm_nb); 15759ed24f4bSMarc Zyngier } 157644362a3cSMarc Zyngier static void hyp_cpu_pm_exit(void) 15779ed24f4bSMarc Zyngier { 1578fa8c3d65SDavid Brazdil if (!is_protected_kvm_enabled()) 15799ed24f4bSMarc Zyngier cpu_pm_unregister_notifier(&hyp_init_cpu_pm_nb); 15809ed24f4bSMarc Zyngier } 15819ed24f4bSMarc Zyngier #else 15829ed24f4bSMarc Zyngier static inline void hyp_cpu_pm_init(void) 15839ed24f4bSMarc Zyngier { 15849ed24f4bSMarc Zyngier } 15859ed24f4bSMarc Zyngier static inline void hyp_cpu_pm_exit(void) 15869ed24f4bSMarc Zyngier { 15879ed24f4bSMarc Zyngier } 15889ed24f4bSMarc Zyngier #endif 15899ed24f4bSMarc Zyngier 159094f5e8a4SDavid Brazdil static void init_cpu_logical_map(void) 159194f5e8a4SDavid Brazdil { 159294f5e8a4SDavid Brazdil unsigned int cpu; 159394f5e8a4SDavid Brazdil 159494f5e8a4SDavid Brazdil /* 159594f5e8a4SDavid Brazdil * Copy the MPIDR <-> logical CPU ID mapping to hyp. 159694f5e8a4SDavid Brazdil * Only copy the set of online CPUs whose features have been chacked 159794f5e8a4SDavid Brazdil * against the finalized system capabilities. The hypervisor will not 159894f5e8a4SDavid Brazdil * allow any other CPUs from the `possible` set to boot. 159994f5e8a4SDavid Brazdil */ 160094f5e8a4SDavid Brazdil for_each_online_cpu(cpu) 160161fe0c37SDavid Brazdil hyp_cpu_logical_map[cpu] = cpu_logical_map(cpu); 160294f5e8a4SDavid Brazdil } 160394f5e8a4SDavid Brazdil 1604767c973fSMarc Zyngier #define init_psci_0_1_impl_state(config, what) \ 1605767c973fSMarc Zyngier config.psci_0_1_ ## what ## _implemented = psci_ops.what 1606767c973fSMarc Zyngier 1607eeeee719SDavid Brazdil static bool init_psci_relay(void) 1608eeeee719SDavid Brazdil { 1609eeeee719SDavid Brazdil /* 1610eeeee719SDavid Brazdil * If PSCI has not been initialized, protected KVM cannot install 1611eeeee719SDavid Brazdil * itself on newly booted CPUs. 1612eeeee719SDavid Brazdil */ 1613eeeee719SDavid Brazdil if (!psci_ops.get_version) { 1614eeeee719SDavid Brazdil kvm_err("Cannot initialize protected mode without PSCI\n"); 1615eeeee719SDavid Brazdil return false; 1616eeeee719SDavid Brazdil } 1617eeeee719SDavid Brazdil 1618ff367fe4SDavid Brazdil kvm_host_psci_config.version = psci_ops.get_version(); 1619ff367fe4SDavid Brazdil 1620ff367fe4SDavid Brazdil if (kvm_host_psci_config.version == PSCI_VERSION(0, 1)) { 1621ff367fe4SDavid Brazdil kvm_host_psci_config.function_ids_0_1 = get_psci_0_1_function_ids(); 1622767c973fSMarc Zyngier init_psci_0_1_impl_state(kvm_host_psci_config, cpu_suspend); 1623767c973fSMarc Zyngier init_psci_0_1_impl_state(kvm_host_psci_config, cpu_on); 1624767c973fSMarc Zyngier init_psci_0_1_impl_state(kvm_host_psci_config, cpu_off); 1625767c973fSMarc Zyngier init_psci_0_1_impl_state(kvm_host_psci_config, migrate); 1626ff367fe4SDavid Brazdil } 1627eeeee719SDavid Brazdil return true; 1628eeeee719SDavid Brazdil } 1629eeeee719SDavid Brazdil 16309ed24f4bSMarc Zyngier static int init_common_resources(void) 16319ed24f4bSMarc Zyngier { 1632039aeb9dSLinus Torvalds return kvm_set_ipa_limit(); 16339ed24f4bSMarc Zyngier } 16349ed24f4bSMarc Zyngier 16359ed24f4bSMarc Zyngier static int init_subsystems(void) 16369ed24f4bSMarc Zyngier { 16379ed24f4bSMarc Zyngier int err = 0; 16389ed24f4bSMarc Zyngier 16399ed24f4bSMarc Zyngier /* 16409ed24f4bSMarc Zyngier * Enable hardware so that subsystem initialisation can access EL2. 16419ed24f4bSMarc Zyngier */ 16429ed24f4bSMarc Zyngier on_each_cpu(_kvm_arch_hardware_enable, NULL, 1); 16439ed24f4bSMarc Zyngier 16449ed24f4bSMarc Zyngier /* 16459ed24f4bSMarc Zyngier * Register CPU lower-power notifier 16469ed24f4bSMarc Zyngier */ 16479ed24f4bSMarc Zyngier hyp_cpu_pm_init(); 16489ed24f4bSMarc Zyngier 16499ed24f4bSMarc Zyngier /* 16509ed24f4bSMarc Zyngier * Init HYP view of VGIC 16519ed24f4bSMarc Zyngier */ 16529ed24f4bSMarc Zyngier err = kvm_vgic_hyp_init(); 16539ed24f4bSMarc Zyngier switch (err) { 16549ed24f4bSMarc Zyngier case 0: 16559ed24f4bSMarc Zyngier vgic_present = true; 16569ed24f4bSMarc Zyngier break; 16579ed24f4bSMarc Zyngier case -ENODEV: 16589ed24f4bSMarc Zyngier case -ENXIO: 16599ed24f4bSMarc Zyngier vgic_present = false; 16609ed24f4bSMarc Zyngier err = 0; 16619ed24f4bSMarc Zyngier break; 16629ed24f4bSMarc Zyngier default: 16639ed24f4bSMarc Zyngier goto out; 16649ed24f4bSMarc Zyngier } 16659ed24f4bSMarc Zyngier 16669ed24f4bSMarc Zyngier /* 16679ed24f4bSMarc Zyngier * Init HYP architected timer support 16689ed24f4bSMarc Zyngier */ 16699ed24f4bSMarc Zyngier err = kvm_timer_hyp_init(vgic_present); 16709ed24f4bSMarc Zyngier if (err) 16719ed24f4bSMarc Zyngier goto out; 16729ed24f4bSMarc Zyngier 16739ed24f4bSMarc Zyngier kvm_perf_init(); 16746ac4a5acSMarc Zyngier kvm_sys_reg_table_init(); 16759ed24f4bSMarc Zyngier 16769ed24f4bSMarc Zyngier out: 1677fa8c3d65SDavid Brazdil if (err || !is_protected_kvm_enabled()) 16789ed24f4bSMarc Zyngier on_each_cpu(_kvm_arch_hardware_disable, NULL, 1); 16799ed24f4bSMarc Zyngier 16809ed24f4bSMarc Zyngier return err; 16819ed24f4bSMarc Zyngier } 16829ed24f4bSMarc Zyngier 16839ed24f4bSMarc Zyngier static void teardown_hyp_mode(void) 16849ed24f4bSMarc Zyngier { 16859ed24f4bSMarc Zyngier int cpu; 16869ed24f4bSMarc Zyngier 16879ed24f4bSMarc Zyngier free_hyp_pgds(); 168830c95391SDavid Brazdil for_each_possible_cpu(cpu) { 16899ed24f4bSMarc Zyngier free_page(per_cpu(kvm_arm_hyp_stack_page, cpu)); 169030c95391SDavid Brazdil free_pages(kvm_arm_hyp_percpu_base[cpu], nvhe_percpu_order()); 169130c95391SDavid Brazdil } 16929ed24f4bSMarc Zyngier } 16939ed24f4bSMarc Zyngier 16949ed24f4bSMarc Zyngier /** 16959ed24f4bSMarc Zyngier * Inits Hyp-mode on all online CPUs 16969ed24f4bSMarc Zyngier */ 16979ed24f4bSMarc Zyngier static int init_hyp_mode(void) 16989ed24f4bSMarc Zyngier { 16999ed24f4bSMarc Zyngier int cpu; 17009ed24f4bSMarc Zyngier int err = 0; 17019ed24f4bSMarc Zyngier 17029ed24f4bSMarc Zyngier /* 17039ed24f4bSMarc Zyngier * Allocate Hyp PGD and setup Hyp identity mapping 17049ed24f4bSMarc Zyngier */ 17059ed24f4bSMarc Zyngier err = kvm_mmu_init(); 17069ed24f4bSMarc Zyngier if (err) 17079ed24f4bSMarc Zyngier goto out_err; 17089ed24f4bSMarc Zyngier 17099ed24f4bSMarc Zyngier /* 17109ed24f4bSMarc Zyngier * Allocate stack pages for Hypervisor-mode 17119ed24f4bSMarc Zyngier */ 17129ed24f4bSMarc Zyngier for_each_possible_cpu(cpu) { 17139ed24f4bSMarc Zyngier unsigned long stack_page; 17149ed24f4bSMarc Zyngier 17159ed24f4bSMarc Zyngier stack_page = __get_free_page(GFP_KERNEL); 17169ed24f4bSMarc Zyngier if (!stack_page) { 17179ed24f4bSMarc Zyngier err = -ENOMEM; 17189ed24f4bSMarc Zyngier goto out_err; 17199ed24f4bSMarc Zyngier } 17209ed24f4bSMarc Zyngier 17219ed24f4bSMarc Zyngier per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page; 17229ed24f4bSMarc Zyngier } 17239ed24f4bSMarc Zyngier 17249ed24f4bSMarc Zyngier /* 172530c95391SDavid Brazdil * Allocate and initialize pages for Hypervisor-mode percpu regions. 172630c95391SDavid Brazdil */ 172730c95391SDavid Brazdil for_each_possible_cpu(cpu) { 172830c95391SDavid Brazdil struct page *page; 172930c95391SDavid Brazdil void *page_addr; 173030c95391SDavid Brazdil 173130c95391SDavid Brazdil page = alloc_pages(GFP_KERNEL, nvhe_percpu_order()); 173230c95391SDavid Brazdil if (!page) { 173330c95391SDavid Brazdil err = -ENOMEM; 173430c95391SDavid Brazdil goto out_err; 173530c95391SDavid Brazdil } 173630c95391SDavid Brazdil 173730c95391SDavid Brazdil page_addr = page_address(page); 173830c95391SDavid Brazdil memcpy(page_addr, CHOOSE_NVHE_SYM(__per_cpu_start), nvhe_percpu_size()); 173930c95391SDavid Brazdil kvm_arm_hyp_percpu_base[cpu] = (unsigned long)page_addr; 174030c95391SDavid Brazdil } 174130c95391SDavid Brazdil 174230c95391SDavid Brazdil /* 17439ed24f4bSMarc Zyngier * Map the Hyp-code called directly from the host 17449ed24f4bSMarc Zyngier */ 17459ed24f4bSMarc Zyngier err = create_hyp_mappings(kvm_ksym_ref(__hyp_text_start), 17469ed24f4bSMarc Zyngier kvm_ksym_ref(__hyp_text_end), PAGE_HYP_EXEC); 17479ed24f4bSMarc Zyngier if (err) { 17489ed24f4bSMarc Zyngier kvm_err("Cannot map world-switch code\n"); 17499ed24f4bSMarc Zyngier goto out_err; 17509ed24f4bSMarc Zyngier } 17519ed24f4bSMarc Zyngier 17522d7bf218SDavid Brazdil err = create_hyp_mappings(kvm_ksym_ref(__hyp_data_ro_after_init_start), 17532d7bf218SDavid Brazdil kvm_ksym_ref(__hyp_data_ro_after_init_end), 17542d7bf218SDavid Brazdil PAGE_HYP_RO); 17552d7bf218SDavid Brazdil if (err) { 17562d7bf218SDavid Brazdil kvm_err("Cannot map .hyp.data..ro_after_init section\n"); 17572d7bf218SDavid Brazdil goto out_err; 17582d7bf218SDavid Brazdil } 17592d7bf218SDavid Brazdil 17609ed24f4bSMarc Zyngier err = create_hyp_mappings(kvm_ksym_ref(__start_rodata), 17619ed24f4bSMarc Zyngier kvm_ksym_ref(__end_rodata), PAGE_HYP_RO); 17629ed24f4bSMarc Zyngier if (err) { 17639ed24f4bSMarc Zyngier kvm_err("Cannot map rodata section\n"); 17649ed24f4bSMarc Zyngier goto out_err; 17659ed24f4bSMarc Zyngier } 17669ed24f4bSMarc Zyngier 17679ed24f4bSMarc Zyngier err = create_hyp_mappings(kvm_ksym_ref(__bss_start), 17689ed24f4bSMarc Zyngier kvm_ksym_ref(__bss_stop), PAGE_HYP_RO); 17699ed24f4bSMarc Zyngier if (err) { 17709ed24f4bSMarc Zyngier kvm_err("Cannot map bss section\n"); 17719ed24f4bSMarc Zyngier goto out_err; 17729ed24f4bSMarc Zyngier } 17739ed24f4bSMarc Zyngier 17749ed24f4bSMarc Zyngier /* 17759ed24f4bSMarc Zyngier * Map the Hyp stack pages 17769ed24f4bSMarc Zyngier */ 17779ed24f4bSMarc Zyngier for_each_possible_cpu(cpu) { 17789ed24f4bSMarc Zyngier char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu); 17799ed24f4bSMarc Zyngier err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE, 17809ed24f4bSMarc Zyngier PAGE_HYP); 17819ed24f4bSMarc Zyngier 17829ed24f4bSMarc Zyngier if (err) { 17839ed24f4bSMarc Zyngier kvm_err("Cannot map hyp stack\n"); 17849ed24f4bSMarc Zyngier goto out_err; 17859ed24f4bSMarc Zyngier } 17869ed24f4bSMarc Zyngier } 17879ed24f4bSMarc Zyngier 178830c95391SDavid Brazdil /* 178930c95391SDavid Brazdil * Map Hyp percpu pages 179030c95391SDavid Brazdil */ 17919ed24f4bSMarc Zyngier for_each_possible_cpu(cpu) { 179230c95391SDavid Brazdil char *percpu_begin = (char *)kvm_arm_hyp_percpu_base[cpu]; 179330c95391SDavid Brazdil char *percpu_end = percpu_begin + nvhe_percpu_size(); 17949ed24f4bSMarc Zyngier 179530c95391SDavid Brazdil err = create_hyp_mappings(percpu_begin, percpu_end, PAGE_HYP); 17969ed24f4bSMarc Zyngier 17979ed24f4bSMarc Zyngier if (err) { 179830c95391SDavid Brazdil kvm_err("Cannot map hyp percpu region\n"); 17996e3bfbb2SAndrew Scull goto out_err; 18006e3bfbb2SAndrew Scull } 18019ed24f4bSMarc Zyngier } 18029ed24f4bSMarc Zyngier 1803eeeee719SDavid Brazdil if (is_protected_kvm_enabled()) { 180494f5e8a4SDavid Brazdil init_cpu_logical_map(); 180594f5e8a4SDavid Brazdil 1806eeeee719SDavid Brazdil if (!init_psci_relay()) 1807eeeee719SDavid Brazdil goto out_err; 1808eeeee719SDavid Brazdil } 1809eeeee719SDavid Brazdil 18109ed24f4bSMarc Zyngier return 0; 18119ed24f4bSMarc Zyngier 18129ed24f4bSMarc Zyngier out_err: 18139ed24f4bSMarc Zyngier teardown_hyp_mode(); 18149ed24f4bSMarc Zyngier kvm_err("error initializing Hyp mode: %d\n", err); 18159ed24f4bSMarc Zyngier return err; 18169ed24f4bSMarc Zyngier } 18179ed24f4bSMarc Zyngier 18189ed24f4bSMarc Zyngier static void check_kvm_target_cpu(void *ret) 18199ed24f4bSMarc Zyngier { 18209ed24f4bSMarc Zyngier *(int *)ret = kvm_target_cpu(); 18219ed24f4bSMarc Zyngier } 18229ed24f4bSMarc Zyngier 18239ed24f4bSMarc Zyngier struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr) 18249ed24f4bSMarc Zyngier { 18259ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu; 18269ed24f4bSMarc Zyngier int i; 18279ed24f4bSMarc Zyngier 18289ed24f4bSMarc Zyngier mpidr &= MPIDR_HWID_BITMASK; 18299ed24f4bSMarc Zyngier kvm_for_each_vcpu(i, vcpu, kvm) { 18309ed24f4bSMarc Zyngier if (mpidr == kvm_vcpu_get_mpidr_aff(vcpu)) 18319ed24f4bSMarc Zyngier return vcpu; 18329ed24f4bSMarc Zyngier } 18339ed24f4bSMarc Zyngier return NULL; 18349ed24f4bSMarc Zyngier } 18359ed24f4bSMarc Zyngier 18369ed24f4bSMarc Zyngier bool kvm_arch_has_irq_bypass(void) 18379ed24f4bSMarc Zyngier { 18389ed24f4bSMarc Zyngier return true; 18399ed24f4bSMarc Zyngier } 18409ed24f4bSMarc Zyngier 18419ed24f4bSMarc Zyngier int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons, 18429ed24f4bSMarc Zyngier struct irq_bypass_producer *prod) 18439ed24f4bSMarc Zyngier { 18449ed24f4bSMarc Zyngier struct kvm_kernel_irqfd *irqfd = 18459ed24f4bSMarc Zyngier container_of(cons, struct kvm_kernel_irqfd, consumer); 18469ed24f4bSMarc Zyngier 18479ed24f4bSMarc Zyngier return kvm_vgic_v4_set_forwarding(irqfd->kvm, prod->irq, 18489ed24f4bSMarc Zyngier &irqfd->irq_entry); 18499ed24f4bSMarc Zyngier } 18509ed24f4bSMarc Zyngier void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons, 18519ed24f4bSMarc Zyngier struct irq_bypass_producer *prod) 18529ed24f4bSMarc Zyngier { 18539ed24f4bSMarc Zyngier struct kvm_kernel_irqfd *irqfd = 18549ed24f4bSMarc Zyngier container_of(cons, struct kvm_kernel_irqfd, consumer); 18559ed24f4bSMarc Zyngier 18569ed24f4bSMarc Zyngier kvm_vgic_v4_unset_forwarding(irqfd->kvm, prod->irq, 18579ed24f4bSMarc Zyngier &irqfd->irq_entry); 18589ed24f4bSMarc Zyngier } 18599ed24f4bSMarc Zyngier 18609ed24f4bSMarc Zyngier void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *cons) 18619ed24f4bSMarc Zyngier { 18629ed24f4bSMarc Zyngier struct kvm_kernel_irqfd *irqfd = 18639ed24f4bSMarc Zyngier container_of(cons, struct kvm_kernel_irqfd, consumer); 18649ed24f4bSMarc Zyngier 18659ed24f4bSMarc Zyngier kvm_arm_halt_guest(irqfd->kvm); 18669ed24f4bSMarc Zyngier } 18679ed24f4bSMarc Zyngier 18689ed24f4bSMarc Zyngier void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *cons) 18699ed24f4bSMarc Zyngier { 18709ed24f4bSMarc Zyngier struct kvm_kernel_irqfd *irqfd = 18719ed24f4bSMarc Zyngier container_of(cons, struct kvm_kernel_irqfd, consumer); 18729ed24f4bSMarc Zyngier 18739ed24f4bSMarc Zyngier kvm_arm_resume_guest(irqfd->kvm); 18749ed24f4bSMarc Zyngier } 18759ed24f4bSMarc Zyngier 18769ed24f4bSMarc Zyngier /** 18779ed24f4bSMarc Zyngier * Initialize Hyp-mode and memory mappings on all CPUs. 18789ed24f4bSMarc Zyngier */ 18799ed24f4bSMarc Zyngier int kvm_arch_init(void *opaque) 18809ed24f4bSMarc Zyngier { 18819ed24f4bSMarc Zyngier int err; 18829ed24f4bSMarc Zyngier int ret, cpu; 18839ed24f4bSMarc Zyngier bool in_hyp_mode; 18849ed24f4bSMarc Zyngier 18859ed24f4bSMarc Zyngier if (!is_hyp_mode_available()) { 18869ed24f4bSMarc Zyngier kvm_info("HYP mode not available\n"); 18879ed24f4bSMarc Zyngier return -ENODEV; 18889ed24f4bSMarc Zyngier } 18899ed24f4bSMarc Zyngier 18909ed24f4bSMarc Zyngier in_hyp_mode = is_kernel_in_hyp_mode(); 18919ed24f4bSMarc Zyngier 18929ed24f4bSMarc Zyngier if (!in_hyp_mode && kvm_arch_requires_vhe()) { 18939ed24f4bSMarc Zyngier kvm_pr_unimpl("CPU unsupported in non-VHE mode, not initializing\n"); 18949ed24f4bSMarc Zyngier return -ENODEV; 18959ed24f4bSMarc Zyngier } 18969ed24f4bSMarc Zyngier 189796d389caSRob Herring if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) || 189896d389caSRob Herring cpus_have_final_cap(ARM64_WORKAROUND_1508412)) 1899abf532ccSRob Herring kvm_info("Guests without required CPU erratum workarounds can deadlock system!\n" \ 1900abf532ccSRob Herring "Only trusted guests should be used on this system.\n"); 1901abf532ccSRob Herring 19029ed24f4bSMarc Zyngier for_each_online_cpu(cpu) { 19039ed24f4bSMarc Zyngier smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1); 19049ed24f4bSMarc Zyngier if (ret < 0) { 19059ed24f4bSMarc Zyngier kvm_err("Error, CPU %d not supported!\n", cpu); 19069ed24f4bSMarc Zyngier return -ENODEV; 19079ed24f4bSMarc Zyngier } 19089ed24f4bSMarc Zyngier } 19099ed24f4bSMarc Zyngier 19109ed24f4bSMarc Zyngier err = init_common_resources(); 19119ed24f4bSMarc Zyngier if (err) 19129ed24f4bSMarc Zyngier return err; 19139ed24f4bSMarc Zyngier 19149ed24f4bSMarc Zyngier err = kvm_arm_init_sve(); 19159ed24f4bSMarc Zyngier if (err) 19169ed24f4bSMarc Zyngier return err; 19179ed24f4bSMarc Zyngier 19189ed24f4bSMarc Zyngier if (!in_hyp_mode) { 19199ed24f4bSMarc Zyngier err = init_hyp_mode(); 19209ed24f4bSMarc Zyngier if (err) 19219ed24f4bSMarc Zyngier goto out_err; 19229ed24f4bSMarc Zyngier } 19239ed24f4bSMarc Zyngier 1924b881cdceSWill Deacon err = kvm_init_vector_slots(); 1925b881cdceSWill Deacon if (err) { 1926b881cdceSWill Deacon kvm_err("Cannot initialise vector slots\n"); 1927b881cdceSWill Deacon goto out_err; 1928b881cdceSWill Deacon } 1929b881cdceSWill Deacon 19309ed24f4bSMarc Zyngier err = init_subsystems(); 19319ed24f4bSMarc Zyngier if (err) 19329ed24f4bSMarc Zyngier goto out_hyp; 19339ed24f4bSMarc Zyngier 1934f19f6644SDavid Brazdil if (is_protected_kvm_enabled()) { 1935f19f6644SDavid Brazdil static_branch_enable(&kvm_protected_mode_initialized); 19363eb681fbSDavid Brazdil kvm_info("Protected nVHE mode initialized successfully\n"); 1937f19f6644SDavid Brazdil } else if (in_hyp_mode) { 19389ed24f4bSMarc Zyngier kvm_info("VHE mode initialized successfully\n"); 1939f19f6644SDavid Brazdil } else { 19409ed24f4bSMarc Zyngier kvm_info("Hyp mode initialized successfully\n"); 1941f19f6644SDavid Brazdil } 19429ed24f4bSMarc Zyngier 19439ed24f4bSMarc Zyngier return 0; 19449ed24f4bSMarc Zyngier 19459ed24f4bSMarc Zyngier out_hyp: 19469ed24f4bSMarc Zyngier hyp_cpu_pm_exit(); 19479ed24f4bSMarc Zyngier if (!in_hyp_mode) 19489ed24f4bSMarc Zyngier teardown_hyp_mode(); 19499ed24f4bSMarc Zyngier out_err: 19509ed24f4bSMarc Zyngier return err; 19519ed24f4bSMarc Zyngier } 19529ed24f4bSMarc Zyngier 19539ed24f4bSMarc Zyngier /* NOP: Compiling as a module not supported */ 19549ed24f4bSMarc Zyngier void kvm_arch_exit(void) 19559ed24f4bSMarc Zyngier { 19569ed24f4bSMarc Zyngier kvm_perf_teardown(); 19579ed24f4bSMarc Zyngier } 19589ed24f4bSMarc Zyngier 1959d8b369c4SDavid Brazdil static int __init early_kvm_mode_cfg(char *arg) 1960d8b369c4SDavid Brazdil { 1961d8b369c4SDavid Brazdil if (!arg) 1962d8b369c4SDavid Brazdil return -EINVAL; 1963d8b369c4SDavid Brazdil 1964d8b369c4SDavid Brazdil if (strcmp(arg, "protected") == 0) { 1965d8b369c4SDavid Brazdil kvm_mode = KVM_MODE_PROTECTED; 1966d8b369c4SDavid Brazdil return 0; 1967d8b369c4SDavid Brazdil } 1968d8b369c4SDavid Brazdil 1969*1945a067SMarc Zyngier if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode())) 1970*1945a067SMarc Zyngier return 0; 1971*1945a067SMarc Zyngier 1972d8b369c4SDavid Brazdil return -EINVAL; 1973d8b369c4SDavid Brazdil } 1974d8b369c4SDavid Brazdil early_param("kvm-arm.mode", early_kvm_mode_cfg); 1975d8b369c4SDavid Brazdil 19763eb681fbSDavid Brazdil enum kvm_mode kvm_get_mode(void) 19773eb681fbSDavid Brazdil { 19783eb681fbSDavid Brazdil return kvm_mode; 19793eb681fbSDavid Brazdil } 19803eb681fbSDavid Brazdil 19819ed24f4bSMarc Zyngier static int arm_init(void) 19829ed24f4bSMarc Zyngier { 19839ed24f4bSMarc Zyngier int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); 19849ed24f4bSMarc Zyngier return rc; 19859ed24f4bSMarc Zyngier } 19869ed24f4bSMarc Zyngier 19879ed24f4bSMarc Zyngier module_init(arm_init); 1988