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> 96caa5812SOliver Upton #include <linux/entry-kvm.h> 109ed24f4bSMarc Zyngier #include <linux/errno.h> 119ed24f4bSMarc Zyngier #include <linux/err.h> 129ed24f4bSMarc Zyngier #include <linux/kvm_host.h> 139ed24f4bSMarc Zyngier #include <linux/list.h> 149ed24f4bSMarc Zyngier #include <linux/module.h> 159ed24f4bSMarc Zyngier #include <linux/vmalloc.h> 169ed24f4bSMarc Zyngier #include <linux/fs.h> 179ed24f4bSMarc Zyngier #include <linux/mman.h> 189ed24f4bSMarc Zyngier #include <linux/sched.h> 1947e6223cSMarc Zyngier #include <linux/kmemleak.h> 209ed24f4bSMarc Zyngier #include <linux/kvm.h> 219ed24f4bSMarc Zyngier #include <linux/kvm_irqfd.h> 229ed24f4bSMarc Zyngier #include <linux/irqbypass.h> 239ed24f4bSMarc Zyngier #include <linux/sched/stat.h> 24eeeee719SDavid Brazdil #include <linux/psci.h> 259ed24f4bSMarc Zyngier #include <trace/events/kvm.h> 269ed24f4bSMarc Zyngier 279ed24f4bSMarc Zyngier #define CREATE_TRACE_POINTS 289ed24f4bSMarc Zyngier #include "trace_arm.h" 299ed24f4bSMarc Zyngier 309ed24f4bSMarc Zyngier #include <linux/uaccess.h> 319ed24f4bSMarc Zyngier #include <asm/ptrace.h> 329ed24f4bSMarc Zyngier #include <asm/mman.h> 339ed24f4bSMarc Zyngier #include <asm/tlbflush.h> 349ed24f4bSMarc Zyngier #include <asm/cacheflush.h> 359ed24f4bSMarc Zyngier #include <asm/cpufeature.h> 369ed24f4bSMarc Zyngier #include <asm/virt.h> 379ed24f4bSMarc Zyngier #include <asm/kvm_arm.h> 389ed24f4bSMarc Zyngier #include <asm/kvm_asm.h> 399ed24f4bSMarc Zyngier #include <asm/kvm_mmu.h> 409ed24f4bSMarc Zyngier #include <asm/kvm_emulate.h> 419ed24f4bSMarc Zyngier #include <asm/sections.h> 429ed24f4bSMarc Zyngier 439ed24f4bSMarc Zyngier #include <kvm/arm_hypercalls.h> 449ed24f4bSMarc Zyngier #include <kvm/arm_pmu.h> 459ed24f4bSMarc Zyngier #include <kvm/arm_psci.h> 469ed24f4bSMarc Zyngier 47d8b369c4SDavid Brazdil static enum kvm_mode kvm_mode = KVM_MODE_DEFAULT; 48f19f6644SDavid Brazdil DEFINE_STATIC_KEY_FALSE(kvm_protected_mode_initialized); 49d8b369c4SDavid Brazdil 5014ef9d04SMarc Zyngier DECLARE_KVM_HYP_PER_CPU(unsigned long, kvm_hyp_vector); 5114ef9d04SMarc Zyngier 529ed24f4bSMarc Zyngier static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page); 5330c95391SDavid Brazdil unsigned long kvm_arm_hyp_percpu_base[NR_CPUS]; 5463fec243SDavid Brazdil DECLARE_KVM_NVHE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params); 559ed24f4bSMarc Zyngier 569ed24f4bSMarc Zyngier static bool vgic_present; 579ed24f4bSMarc Zyngier 589ed24f4bSMarc Zyngier static DEFINE_PER_CPU(unsigned char, kvm_arm_hardware_enabled); 599ed24f4bSMarc Zyngier DEFINE_STATIC_KEY_FALSE(userspace_irqchip_in_use); 609ed24f4bSMarc Zyngier 619ed24f4bSMarc Zyngier int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) 629ed24f4bSMarc Zyngier { 639ed24f4bSMarc Zyngier return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; 649ed24f4bSMarc Zyngier } 659ed24f4bSMarc Zyngier 669ed24f4bSMarc Zyngier int kvm_arch_hardware_setup(void *opaque) 679ed24f4bSMarc Zyngier { 689ed24f4bSMarc Zyngier return 0; 699ed24f4bSMarc Zyngier } 709ed24f4bSMarc Zyngier 719ed24f4bSMarc Zyngier int kvm_arch_check_processor_compat(void *opaque) 729ed24f4bSMarc Zyngier { 739ed24f4bSMarc Zyngier return 0; 749ed24f4bSMarc Zyngier } 759ed24f4bSMarc Zyngier 769ed24f4bSMarc Zyngier int kvm_vm_ioctl_enable_cap(struct kvm *kvm, 779ed24f4bSMarc Zyngier struct kvm_enable_cap *cap) 789ed24f4bSMarc Zyngier { 799ed24f4bSMarc Zyngier int r; 809ed24f4bSMarc Zyngier 819ed24f4bSMarc Zyngier if (cap->flags) 829ed24f4bSMarc Zyngier return -EINVAL; 839ed24f4bSMarc Zyngier 849ed24f4bSMarc Zyngier switch (cap->cap) { 859ed24f4bSMarc Zyngier case KVM_CAP_ARM_NISV_TO_USER: 869ed24f4bSMarc Zyngier r = 0; 8706394531SMarc Zyngier set_bit(KVM_ARCH_FLAG_RETURN_NISV_IO_ABORT_TO_USER, 8806394531SMarc Zyngier &kvm->arch.flags); 899ed24f4bSMarc Zyngier break; 90673638f4SSteven Price case KVM_CAP_ARM_MTE: 91c4d7c518SSteven Price mutex_lock(&kvm->lock); 92c4d7c518SSteven Price if (!system_supports_mte() || kvm->created_vcpus) { 93c4d7c518SSteven Price r = -EINVAL; 94c4d7c518SSteven Price } else { 95673638f4SSteven Price r = 0; 9606394531SMarc Zyngier set_bit(KVM_ARCH_FLAG_MTE_ENABLED, &kvm->arch.flags); 97c4d7c518SSteven Price } 98c4d7c518SSteven Price mutex_unlock(&kvm->lock); 99673638f4SSteven Price break; 100*bfbab445SOliver Upton case KVM_CAP_ARM_SYSTEM_SUSPEND: 101*bfbab445SOliver Upton r = 0; 102*bfbab445SOliver Upton set_bit(KVM_ARCH_FLAG_SYSTEM_SUSPEND_ENABLED, &kvm->arch.flags); 103*bfbab445SOliver Upton break; 1049ed24f4bSMarc Zyngier default: 1059ed24f4bSMarc Zyngier r = -EINVAL; 1069ed24f4bSMarc Zyngier break; 1079ed24f4bSMarc Zyngier } 1089ed24f4bSMarc Zyngier 1099ed24f4bSMarc Zyngier return r; 1109ed24f4bSMarc Zyngier } 1119ed24f4bSMarc Zyngier 1125107000fSMarc Zyngier static int kvm_arm_default_max_vcpus(void) 1135107000fSMarc Zyngier { 1145107000fSMarc Zyngier return vgic_present ? kvm_vgic_get_max_vcpus() : KVM_MAX_VCPUS; 1155107000fSMarc Zyngier } 1165107000fSMarc Zyngier 1174f1df628SMarc Zyngier static void set_default_spectre(struct kvm *kvm) 11823711a5eSMarc Zyngier { 11923711a5eSMarc Zyngier /* 12023711a5eSMarc Zyngier * The default is to expose CSV2 == 1 if the HW isn't affected. 12123711a5eSMarc Zyngier * Although this is a per-CPU feature, we make it global because 12223711a5eSMarc Zyngier * asymmetric systems are just a nuisance. 12323711a5eSMarc Zyngier * 12423711a5eSMarc Zyngier * Userspace can override this as long as it doesn't promise 12523711a5eSMarc Zyngier * the impossible. 12623711a5eSMarc Zyngier */ 12723711a5eSMarc Zyngier if (arm64_get_spectre_v2_state() == SPECTRE_UNAFFECTED) 12823711a5eSMarc Zyngier kvm->arch.pfr0_csv2 = 1; 1294f1df628SMarc Zyngier if (arm64_get_meltdown_state() == SPECTRE_UNAFFECTED) 1304f1df628SMarc Zyngier kvm->arch.pfr0_csv3 = 1; 13123711a5eSMarc Zyngier } 13223711a5eSMarc Zyngier 1339ed24f4bSMarc Zyngier /** 1349ed24f4bSMarc Zyngier * kvm_arch_init_vm - initializes a VM data structure 1359ed24f4bSMarc Zyngier * @kvm: pointer to the KVM struct 1369ed24f4bSMarc Zyngier */ 1379ed24f4bSMarc Zyngier int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) 1389ed24f4bSMarc Zyngier { 139a0e50aa3SChristoffer Dall int ret; 1409ed24f4bSMarc Zyngier 1419ed24f4bSMarc Zyngier ret = kvm_arm_setup_stage2(kvm, type); 1429ed24f4bSMarc Zyngier if (ret) 1439ed24f4bSMarc Zyngier return ret; 1449ed24f4bSMarc Zyngier 145a0e50aa3SChristoffer Dall ret = kvm_init_stage2_mmu(kvm, &kvm->arch.mmu); 1469ed24f4bSMarc Zyngier if (ret) 147a0e50aa3SChristoffer Dall return ret; 1489ed24f4bSMarc Zyngier 1493f868e14SQuentin Perret ret = kvm_share_hyp(kvm, kvm + 1); 1509ed24f4bSMarc Zyngier if (ret) 1519ed24f4bSMarc Zyngier goto out_free_stage2_pgd; 1529ed24f4bSMarc Zyngier 153583cda1bSAlexandru Elisei if (!zalloc_cpumask_var(&kvm->arch.supported_cpus, GFP_KERNEL)) 154583cda1bSAlexandru Elisei goto out_free_stage2_pgd; 155583cda1bSAlexandru Elisei cpumask_copy(kvm->arch.supported_cpus, cpu_possible_mask); 156583cda1bSAlexandru Elisei 1579ed24f4bSMarc Zyngier kvm_vgic_early_init(kvm); 1589ed24f4bSMarc Zyngier 1599ed24f4bSMarc Zyngier /* The maximum number of VCPUs is limited by the host's GIC model */ 1605107000fSMarc Zyngier kvm->arch.max_vcpus = kvm_arm_default_max_vcpus(); 1619ed24f4bSMarc Zyngier 1624f1df628SMarc Zyngier set_default_spectre(kvm); 16323711a5eSMarc Zyngier 1649ed24f4bSMarc Zyngier return ret; 1659ed24f4bSMarc Zyngier out_free_stage2_pgd: 166a0e50aa3SChristoffer Dall kvm_free_stage2_pgd(&kvm->arch.mmu); 1679ed24f4bSMarc Zyngier return ret; 1689ed24f4bSMarc Zyngier } 1699ed24f4bSMarc Zyngier 1709ed24f4bSMarc Zyngier vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) 1719ed24f4bSMarc Zyngier { 1729ed24f4bSMarc Zyngier return VM_FAULT_SIGBUS; 1739ed24f4bSMarc Zyngier } 1749ed24f4bSMarc Zyngier 1759ed24f4bSMarc Zyngier 1769ed24f4bSMarc Zyngier /** 1779ed24f4bSMarc Zyngier * kvm_arch_destroy_vm - destroy the VM data structure 1789ed24f4bSMarc Zyngier * @kvm: pointer to the KVM struct 1799ed24f4bSMarc Zyngier */ 1809ed24f4bSMarc Zyngier void kvm_arch_destroy_vm(struct kvm *kvm) 1819ed24f4bSMarc Zyngier { 182d7eec236SMarc Zyngier bitmap_free(kvm->arch.pmu_filter); 183583cda1bSAlexandru Elisei free_cpumask_var(kvm->arch.supported_cpus); 184d7eec236SMarc Zyngier 1859ed24f4bSMarc Zyngier kvm_vgic_destroy(kvm); 1869ed24f4bSMarc Zyngier 18727592ae8SMarc Zyngier kvm_destroy_vcpus(kvm); 18852b28657SQuentin Perret 18952b28657SQuentin Perret kvm_unshare_hyp(kvm, kvm + 1); 1909ed24f4bSMarc Zyngier } 1919ed24f4bSMarc Zyngier 1929ed24f4bSMarc Zyngier int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) 1939ed24f4bSMarc Zyngier { 1949ed24f4bSMarc Zyngier int r; 1959ed24f4bSMarc Zyngier switch (ext) { 1969ed24f4bSMarc Zyngier case KVM_CAP_IRQCHIP: 1979ed24f4bSMarc Zyngier r = vgic_present; 1989ed24f4bSMarc Zyngier break; 1999ed24f4bSMarc Zyngier case KVM_CAP_IOEVENTFD: 2009ed24f4bSMarc Zyngier case KVM_CAP_DEVICE_CTRL: 2019ed24f4bSMarc Zyngier case KVM_CAP_USER_MEMORY: 2029ed24f4bSMarc Zyngier case KVM_CAP_SYNC_MMU: 2039ed24f4bSMarc Zyngier case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: 2049ed24f4bSMarc Zyngier case KVM_CAP_ONE_REG: 2059ed24f4bSMarc Zyngier case KVM_CAP_ARM_PSCI: 2069ed24f4bSMarc Zyngier case KVM_CAP_ARM_PSCI_0_2: 2079ed24f4bSMarc Zyngier case KVM_CAP_READONLY_MEM: 2089ed24f4bSMarc Zyngier case KVM_CAP_MP_STATE: 2099ed24f4bSMarc Zyngier case KVM_CAP_IMMEDIATE_EXIT: 2109ed24f4bSMarc Zyngier case KVM_CAP_VCPU_EVENTS: 2119ed24f4bSMarc Zyngier case KVM_CAP_ARM_IRQ_LINE_LAYOUT_2: 2129ed24f4bSMarc Zyngier case KVM_CAP_ARM_NISV_TO_USER: 2139ed24f4bSMarc Zyngier case KVM_CAP_ARM_INJECT_EXT_DABT: 21436fb4cd5SWill Deacon case KVM_CAP_SET_GUEST_DEBUG: 21536fb4cd5SWill Deacon case KVM_CAP_VCPU_ATTRIBUTES: 2163bf72569SJianyong Wu case KVM_CAP_PTP_KVM: 217*bfbab445SOliver Upton case KVM_CAP_ARM_SYSTEM_SUSPEND: 2189ed24f4bSMarc Zyngier r = 1; 2199ed24f4bSMarc Zyngier break; 220fa18aca9SMaxim Levitsky case KVM_CAP_SET_GUEST_DEBUG2: 221fa18aca9SMaxim Levitsky return KVM_GUESTDBG_VALID_MASK; 2229ed24f4bSMarc Zyngier case KVM_CAP_ARM_SET_DEVICE_ADDR: 2239ed24f4bSMarc Zyngier r = 1; 2249ed24f4bSMarc Zyngier break; 2259ed24f4bSMarc Zyngier case KVM_CAP_NR_VCPUS: 226f60a00d7SVitaly Kuznetsov /* 227f60a00d7SVitaly Kuznetsov * ARM64 treats KVM_CAP_NR_CPUS differently from all other 228f60a00d7SVitaly Kuznetsov * architectures, as it does not always bound it to 229f60a00d7SVitaly Kuznetsov * KVM_CAP_MAX_VCPUS. It should not matter much because 230f60a00d7SVitaly Kuznetsov * this is just an advisory value. 231f60a00d7SVitaly Kuznetsov */ 232f60a00d7SVitaly Kuznetsov r = min_t(unsigned int, num_online_cpus(), 233f60a00d7SVitaly Kuznetsov kvm_arm_default_max_vcpus()); 2349ed24f4bSMarc Zyngier break; 2359ed24f4bSMarc Zyngier case KVM_CAP_MAX_VCPUS: 2369ed24f4bSMarc Zyngier case KVM_CAP_MAX_VCPU_ID: 2375107000fSMarc Zyngier if (kvm) 2385107000fSMarc Zyngier r = kvm->arch.max_vcpus; 2395107000fSMarc Zyngier else 2405107000fSMarc Zyngier r = kvm_arm_default_max_vcpus(); 2419ed24f4bSMarc Zyngier break; 2429ed24f4bSMarc Zyngier case KVM_CAP_MSI_DEVID: 2439ed24f4bSMarc Zyngier if (!kvm) 2449ed24f4bSMarc Zyngier r = -EINVAL; 2459ed24f4bSMarc Zyngier else 2469ed24f4bSMarc Zyngier r = kvm->arch.vgic.msis_require_devid; 2479ed24f4bSMarc Zyngier break; 2489ed24f4bSMarc Zyngier case KVM_CAP_ARM_USER_IRQ: 2499ed24f4bSMarc Zyngier /* 2509ed24f4bSMarc Zyngier * 1: EL1_VTIMER, EL1_PTIMER, and PMU. 2519ed24f4bSMarc Zyngier * (bump this number if adding more devices) 2529ed24f4bSMarc Zyngier */ 2539ed24f4bSMarc Zyngier r = 1; 2549ed24f4bSMarc Zyngier break; 255673638f4SSteven Price case KVM_CAP_ARM_MTE: 256673638f4SSteven Price r = system_supports_mte(); 257673638f4SSteven Price break; 258004a0124SAndrew Jones case KVM_CAP_STEAL_TIME: 259004a0124SAndrew Jones r = kvm_arm_pvtime_supported(); 260004a0124SAndrew Jones break; 26136fb4cd5SWill Deacon case KVM_CAP_ARM_EL1_32BIT: 26236fb4cd5SWill Deacon r = cpus_have_const_cap(ARM64_HAS_32BIT_EL1); 2639ed24f4bSMarc Zyngier break; 26436fb4cd5SWill Deacon case KVM_CAP_GUEST_DEBUG_HW_BPS: 26536fb4cd5SWill Deacon r = get_num_brps(); 26636fb4cd5SWill Deacon break; 26736fb4cd5SWill Deacon case KVM_CAP_GUEST_DEBUG_HW_WPS: 26836fb4cd5SWill Deacon r = get_num_wrps(); 26936fb4cd5SWill Deacon break; 27036fb4cd5SWill Deacon case KVM_CAP_ARM_PMU_V3: 27136fb4cd5SWill Deacon r = kvm_arm_support_pmu_v3(); 27236fb4cd5SWill Deacon break; 27336fb4cd5SWill Deacon case KVM_CAP_ARM_INJECT_SERROR_ESR: 27436fb4cd5SWill Deacon r = cpus_have_const_cap(ARM64_HAS_RAS_EXTN); 27536fb4cd5SWill Deacon break; 27636fb4cd5SWill Deacon case KVM_CAP_ARM_VM_IPA_SIZE: 27736fb4cd5SWill Deacon r = get_kvm_ipa_limit(); 27836fb4cd5SWill Deacon break; 27936fb4cd5SWill Deacon case KVM_CAP_ARM_SVE: 28036fb4cd5SWill Deacon r = system_supports_sve(); 28136fb4cd5SWill Deacon break; 28236fb4cd5SWill Deacon case KVM_CAP_ARM_PTRAUTH_ADDRESS: 28336fb4cd5SWill Deacon case KVM_CAP_ARM_PTRAUTH_GENERIC: 28436fb4cd5SWill Deacon r = system_has_full_ptr_auth(); 28536fb4cd5SWill Deacon break; 28636fb4cd5SWill Deacon default: 28736fb4cd5SWill Deacon r = 0; 2889ed24f4bSMarc Zyngier } 28936fb4cd5SWill Deacon 2909ed24f4bSMarc Zyngier return r; 2919ed24f4bSMarc Zyngier } 2929ed24f4bSMarc Zyngier 2939ed24f4bSMarc Zyngier long kvm_arch_dev_ioctl(struct file *filp, 2949ed24f4bSMarc Zyngier unsigned int ioctl, unsigned long arg) 2959ed24f4bSMarc Zyngier { 2969ed24f4bSMarc Zyngier return -EINVAL; 2979ed24f4bSMarc Zyngier } 2989ed24f4bSMarc Zyngier 2999ed24f4bSMarc Zyngier struct kvm *kvm_arch_alloc_vm(void) 3009ed24f4bSMarc Zyngier { 301115bae92SJia He size_t sz = sizeof(struct kvm); 3029ed24f4bSMarc Zyngier 303115bae92SJia He if (!has_vhe()) 304115bae92SJia He return kzalloc(sz, GFP_KERNEL_ACCOUNT); 305115bae92SJia He 306115bae92SJia He return __vmalloc(sz, GFP_KERNEL_ACCOUNT | __GFP_HIGHMEM | __GFP_ZERO); 3079ed24f4bSMarc Zyngier } 3089ed24f4bSMarc Zyngier 3099ed24f4bSMarc Zyngier int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id) 3109ed24f4bSMarc Zyngier { 3119ed24f4bSMarc Zyngier if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) 3129ed24f4bSMarc Zyngier return -EBUSY; 3139ed24f4bSMarc Zyngier 3149ed24f4bSMarc Zyngier if (id >= kvm->arch.max_vcpus) 3159ed24f4bSMarc Zyngier return -EINVAL; 3169ed24f4bSMarc Zyngier 3179ed24f4bSMarc Zyngier return 0; 3189ed24f4bSMarc Zyngier } 3199ed24f4bSMarc Zyngier 3209ed24f4bSMarc Zyngier int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu) 3219ed24f4bSMarc Zyngier { 3229ed24f4bSMarc Zyngier int err; 3239ed24f4bSMarc Zyngier 3249ed24f4bSMarc Zyngier /* Force users to call KVM_ARM_VCPU_INIT */ 3259ed24f4bSMarc Zyngier vcpu->arch.target = -1; 3269ed24f4bSMarc Zyngier bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES); 3279ed24f4bSMarc Zyngier 328e539451bSSean Christopherson vcpu->arch.mmu_page_cache.gfp_zero = __GFP_ZERO; 329e539451bSSean Christopherson 3309ed24f4bSMarc Zyngier /* Set up the timer */ 3319ed24f4bSMarc Zyngier kvm_timer_vcpu_init(vcpu); 3329ed24f4bSMarc Zyngier 3339ed24f4bSMarc Zyngier kvm_pmu_vcpu_init(vcpu); 3349ed24f4bSMarc Zyngier 3359ed24f4bSMarc Zyngier kvm_arm_reset_debug_ptr(vcpu); 3369ed24f4bSMarc Zyngier 3379ed24f4bSMarc Zyngier kvm_arm_pvtime_vcpu_init(&vcpu->arch); 3389ed24f4bSMarc Zyngier 339a0e50aa3SChristoffer Dall vcpu->arch.hw_mmu = &vcpu->kvm->arch.mmu; 340a0e50aa3SChristoffer Dall 3419ed24f4bSMarc Zyngier err = kvm_vgic_vcpu_init(vcpu); 3429ed24f4bSMarc Zyngier if (err) 3439ed24f4bSMarc Zyngier return err; 3449ed24f4bSMarc Zyngier 3453f868e14SQuentin Perret return kvm_share_hyp(vcpu, vcpu + 1); 3469ed24f4bSMarc Zyngier } 3479ed24f4bSMarc Zyngier 3489ed24f4bSMarc Zyngier void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) 3499ed24f4bSMarc Zyngier { 3509ed24f4bSMarc Zyngier } 3519ed24f4bSMarc Zyngier 3529ed24f4bSMarc Zyngier void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) 3539ed24f4bSMarc Zyngier { 354cc5705fbSMarc Zyngier if (vcpu_has_run_once(vcpu) && unlikely(!irqchip_in_kernel(vcpu->kvm))) 3559ed24f4bSMarc Zyngier static_branch_dec(&userspace_irqchip_in_use); 3569ed24f4bSMarc Zyngier 3579af3e08bSWill Deacon kvm_mmu_free_memory_cache(&vcpu->arch.mmu_page_cache); 3589ed24f4bSMarc Zyngier kvm_timer_vcpu_terminate(vcpu); 3599ed24f4bSMarc Zyngier kvm_pmu_vcpu_destroy(vcpu); 3609ed24f4bSMarc Zyngier 3619ed24f4bSMarc Zyngier kvm_arm_vcpu_destroy(vcpu); 3629ed24f4bSMarc Zyngier } 3639ed24f4bSMarc Zyngier 3649ed24f4bSMarc Zyngier int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) 3659ed24f4bSMarc Zyngier { 3669ed24f4bSMarc Zyngier return kvm_timer_is_pending(vcpu); 3679ed24f4bSMarc Zyngier } 3689ed24f4bSMarc Zyngier 3699ed24f4bSMarc Zyngier void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) 3709ed24f4bSMarc Zyngier { 3716109c5a6SSean Christopherson 3729ed24f4bSMarc Zyngier } 3739ed24f4bSMarc Zyngier 3749ed24f4bSMarc Zyngier void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) 3759ed24f4bSMarc Zyngier { 3766109c5a6SSean Christopherson 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 /* 38801dc9262SMarc Zyngier * We guarantee that both TLBs and I-cache are private to each 38901dc9262SMarc Zyngier * vcpu. If detecting that a vcpu from the same VM has 39001dc9262SMarc Zyngier * previously run on the same physical CPU, call into the 39101dc9262SMarc Zyngier * hypervisor code to nuke the relevant contexts. 39201dc9262SMarc Zyngier * 3939ed24f4bSMarc Zyngier * We might get preempted before the vCPU actually runs, but 3949ed24f4bSMarc Zyngier * over-invalidation doesn't affect correctness. 3959ed24f4bSMarc Zyngier */ 3969ed24f4bSMarc Zyngier if (*last_ran != vcpu->vcpu_id) { 39701dc9262SMarc Zyngier kvm_call_hyp(__kvm_flush_cpu_context, mmu); 3989ed24f4bSMarc Zyngier *last_ran = vcpu->vcpu_id; 3999ed24f4bSMarc Zyngier } 4009ed24f4bSMarc Zyngier 4019ed24f4bSMarc Zyngier vcpu->cpu = cpu; 4029ed24f4bSMarc Zyngier 4039ed24f4bSMarc Zyngier kvm_vgic_load(vcpu); 4049ed24f4bSMarc Zyngier kvm_timer_vcpu_load(vcpu); 40513aeb9b4SDavid Brazdil if (has_vhe()) 40613aeb9b4SDavid Brazdil kvm_vcpu_load_sysregs_vhe(vcpu); 4079ed24f4bSMarc Zyngier kvm_arch_vcpu_load_fp(vcpu); 4089ed24f4bSMarc Zyngier kvm_vcpu_pmu_restore_guest(vcpu); 4099ed24f4bSMarc Zyngier if (kvm_arm_is_pvtime_enabled(&vcpu->arch)) 4109ed24f4bSMarc Zyngier kvm_make_request(KVM_REQ_RECORD_STEAL, vcpu); 4119ed24f4bSMarc Zyngier 4129ed24f4bSMarc Zyngier if (single_task_running()) 4139ed24f4bSMarc Zyngier vcpu_clear_wfx_traps(vcpu); 4149ed24f4bSMarc Zyngier else 4159ed24f4bSMarc Zyngier vcpu_set_wfx_traps(vcpu); 4169ed24f4bSMarc Zyngier 41729eb5a3cSMarc Zyngier if (vcpu_has_ptrauth(vcpu)) 418ef3e40a7SMarc Zyngier vcpu_ptrauth_disable(vcpu); 419d2602bb4SSuzuki K Poulose kvm_arch_vcpu_load_debug_state_flags(vcpu); 420583cda1bSAlexandru Elisei 421583cda1bSAlexandru Elisei if (!cpumask_test_cpu(smp_processor_id(), vcpu->kvm->arch.supported_cpus)) 422583cda1bSAlexandru Elisei vcpu_set_on_unsupported_cpu(vcpu); 4239ed24f4bSMarc Zyngier } 4249ed24f4bSMarc Zyngier 4259ed24f4bSMarc Zyngier void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) 4269ed24f4bSMarc Zyngier { 427d2602bb4SSuzuki K Poulose kvm_arch_vcpu_put_debug_state_flags(vcpu); 4289ed24f4bSMarc Zyngier kvm_arch_vcpu_put_fp(vcpu); 42913aeb9b4SDavid Brazdil if (has_vhe()) 43013aeb9b4SDavid Brazdil kvm_vcpu_put_sysregs_vhe(vcpu); 4319ed24f4bSMarc Zyngier kvm_timer_vcpu_put(vcpu); 4329ed24f4bSMarc Zyngier kvm_vgic_put(vcpu); 4339ed24f4bSMarc Zyngier kvm_vcpu_pmu_restore_host(vcpu); 434100b4f09SShameer Kolothum kvm_arm_vmid_clear_active(); 4359ed24f4bSMarc Zyngier 436583cda1bSAlexandru Elisei vcpu_clear_on_unsupported_cpu(vcpu); 4379ed24f4bSMarc Zyngier vcpu->cpu = -1; 4389ed24f4bSMarc Zyngier } 4399ed24f4bSMarc Zyngier 4401e579429SOliver Upton void kvm_arm_vcpu_power_off(struct kvm_vcpu *vcpu) 4419ed24f4bSMarc Zyngier { 442b171f9bbSOliver Upton vcpu->arch.mp_state.mp_state = KVM_MP_STATE_STOPPED; 4439ed24f4bSMarc Zyngier kvm_make_request(KVM_REQ_SLEEP, vcpu); 4449ed24f4bSMarc Zyngier kvm_vcpu_kick(vcpu); 4459ed24f4bSMarc Zyngier } 4469ed24f4bSMarc Zyngier 447b171f9bbSOliver Upton bool kvm_arm_vcpu_stopped(struct kvm_vcpu *vcpu) 448b171f9bbSOliver Upton { 449b171f9bbSOliver Upton return vcpu->arch.mp_state.mp_state == KVM_MP_STATE_STOPPED; 450b171f9bbSOliver Upton } 451b171f9bbSOliver Upton 4527b33a09dSOliver Upton static void kvm_arm_vcpu_suspend(struct kvm_vcpu *vcpu) 4537b33a09dSOliver Upton { 4547b33a09dSOliver Upton vcpu->arch.mp_state.mp_state = KVM_MP_STATE_SUSPENDED; 4557b33a09dSOliver Upton kvm_make_request(KVM_REQ_SUSPEND, vcpu); 4567b33a09dSOliver Upton kvm_vcpu_kick(vcpu); 4577b33a09dSOliver Upton } 4587b33a09dSOliver Upton 4597b33a09dSOliver Upton static bool kvm_arm_vcpu_suspended(struct kvm_vcpu *vcpu) 4607b33a09dSOliver Upton { 4617b33a09dSOliver Upton return vcpu->arch.mp_state.mp_state == KVM_MP_STATE_SUSPENDED; 4627b33a09dSOliver Upton } 4637b33a09dSOliver Upton 4649ed24f4bSMarc Zyngier int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, 4659ed24f4bSMarc Zyngier struct kvm_mp_state *mp_state) 4669ed24f4bSMarc Zyngier { 467b171f9bbSOliver Upton *mp_state = vcpu->arch.mp_state; 4689ed24f4bSMarc Zyngier 4699ed24f4bSMarc Zyngier return 0; 4709ed24f4bSMarc Zyngier } 4719ed24f4bSMarc Zyngier 4729ed24f4bSMarc Zyngier int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, 4739ed24f4bSMarc Zyngier struct kvm_mp_state *mp_state) 4749ed24f4bSMarc Zyngier { 4759ed24f4bSMarc Zyngier int ret = 0; 4769ed24f4bSMarc Zyngier 4779ed24f4bSMarc Zyngier switch (mp_state->mp_state) { 4789ed24f4bSMarc Zyngier case KVM_MP_STATE_RUNNABLE: 479b171f9bbSOliver Upton vcpu->arch.mp_state = *mp_state; 4809ed24f4bSMarc Zyngier break; 4819ed24f4bSMarc Zyngier case KVM_MP_STATE_STOPPED: 4821e579429SOliver Upton kvm_arm_vcpu_power_off(vcpu); 4839ed24f4bSMarc Zyngier break; 4847b33a09dSOliver Upton case KVM_MP_STATE_SUSPENDED: 4857b33a09dSOliver Upton kvm_arm_vcpu_suspend(vcpu); 4867b33a09dSOliver Upton break; 4879ed24f4bSMarc Zyngier default: 4889ed24f4bSMarc Zyngier ret = -EINVAL; 4899ed24f4bSMarc Zyngier } 4909ed24f4bSMarc Zyngier 4919ed24f4bSMarc Zyngier return ret; 4929ed24f4bSMarc Zyngier } 4939ed24f4bSMarc Zyngier 4949ed24f4bSMarc Zyngier /** 4959ed24f4bSMarc Zyngier * kvm_arch_vcpu_runnable - determine if the vcpu can be scheduled 4969ed24f4bSMarc Zyngier * @v: The VCPU pointer 4979ed24f4bSMarc Zyngier * 4989ed24f4bSMarc Zyngier * If the guest CPU is not waiting for interrupts or an interrupt line is 4999ed24f4bSMarc Zyngier * asserted, the CPU is by definition runnable. 5009ed24f4bSMarc Zyngier */ 5019ed24f4bSMarc Zyngier int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) 5029ed24f4bSMarc Zyngier { 5039ed24f4bSMarc Zyngier bool irq_lines = *vcpu_hcr(v) & (HCR_VI | HCR_VF); 5049ed24f4bSMarc Zyngier return ((irq_lines || kvm_vgic_vcpu_pending_irq(v)) 505b171f9bbSOliver Upton && !kvm_arm_vcpu_stopped(v) && !v->arch.pause); 5069ed24f4bSMarc Zyngier } 5079ed24f4bSMarc Zyngier 5089ed24f4bSMarc Zyngier bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu) 5099ed24f4bSMarc Zyngier { 5109ed24f4bSMarc Zyngier return vcpu_mode_priv(vcpu); 5119ed24f4bSMarc Zyngier } 5129ed24f4bSMarc Zyngier 5138e5b0adeSLinus Torvalds #ifdef CONFIG_GUEST_PERF_EVENTS 514e1bfc245SSean Christopherson unsigned long kvm_arch_vcpu_get_ip(struct kvm_vcpu *vcpu) 515e1bfc245SSean Christopherson { 516e1bfc245SSean Christopherson return *vcpu_pc(vcpu); 517e1bfc245SSean Christopherson } 5188e5b0adeSLinus Torvalds #endif 519e1bfc245SSean Christopherson 520b5aa368aSMarc Zyngier static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu) 521052f064dSMarc Zyngier { 522b5aa368aSMarc Zyngier return vcpu->arch.target >= 0; 523052f064dSMarc Zyngier } 524052f064dSMarc Zyngier 525b5aa368aSMarc Zyngier /* 526b5aa368aSMarc Zyngier * Handle both the initialisation that is being done when the vcpu is 527b5aa368aSMarc Zyngier * run for the first time, as well as the updates that must be 528b5aa368aSMarc Zyngier * performed each time we get a new thread dealing with this vcpu. 529b5aa368aSMarc Zyngier */ 530b5aa368aSMarc Zyngier int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu) 5319ed24f4bSMarc Zyngier { 5329ed24f4bSMarc Zyngier struct kvm *kvm = vcpu->kvm; 533b5aa368aSMarc Zyngier int ret; 5349ed24f4bSMarc Zyngier 535b5aa368aSMarc Zyngier if (!kvm_vcpu_initialized(vcpu)) 536b5aa368aSMarc Zyngier return -ENOEXEC; 5379ed24f4bSMarc Zyngier 5389ed24f4bSMarc Zyngier if (!kvm_arm_vcpu_is_finalized(vcpu)) 5399ed24f4bSMarc Zyngier return -EPERM; 5409ed24f4bSMarc Zyngier 541b5aa368aSMarc Zyngier ret = kvm_arch_vcpu_run_map_fp(vcpu); 542b5aa368aSMarc Zyngier if (ret) 543b5aa368aSMarc Zyngier return ret; 544b5aa368aSMarc Zyngier 545cc5705fbSMarc Zyngier if (likely(vcpu_has_run_once(vcpu))) 546b5aa368aSMarc Zyngier return 0; 5479ed24f4bSMarc Zyngier 548263d6287SAlexandru Elisei kvm_arm_vcpu_init_debug(vcpu); 549263d6287SAlexandru Elisei 5509ed24f4bSMarc Zyngier if (likely(irqchip_in_kernel(kvm))) { 5519ed24f4bSMarc Zyngier /* 5529ed24f4bSMarc Zyngier * Map the VGIC hardware resources before running a vcpu the 5539ed24f4bSMarc Zyngier * first time on this VM. 5549ed24f4bSMarc Zyngier */ 5559ed24f4bSMarc Zyngier ret = kvm_vgic_map_resources(kvm); 5569ed24f4bSMarc Zyngier if (ret) 5579ed24f4bSMarc Zyngier return ret; 5589ed24f4bSMarc Zyngier } 5599ed24f4bSMarc Zyngier 5609ed24f4bSMarc Zyngier ret = kvm_timer_enable(vcpu); 5619ed24f4bSMarc Zyngier if (ret) 5629ed24f4bSMarc Zyngier return ret; 5639ed24f4bSMarc Zyngier 5649ed24f4bSMarc Zyngier ret = kvm_arm_pmu_v3_enable(vcpu); 5651408e73dSMarc Zyngier if (ret) 5661408e73dSMarc Zyngier return ret; 5671408e73dSMarc Zyngier 5681408e73dSMarc Zyngier if (!irqchip_in_kernel(kvm)) { 5691408e73dSMarc Zyngier /* 5701408e73dSMarc Zyngier * Tell the rest of the code that there are userspace irqchip 5711408e73dSMarc Zyngier * VMs in the wild. 5721408e73dSMarc Zyngier */ 5731408e73dSMarc Zyngier static_branch_inc(&userspace_irqchip_in_use); 5741408e73dSMarc Zyngier } 5759ed24f4bSMarc Zyngier 5762a0c3433SFuad Tabba /* 5772a0c3433SFuad Tabba * Initialize traps for protected VMs. 5782a0c3433SFuad Tabba * NOTE: Move to run in EL2 directly, rather than via a hypercall, once 5792a0c3433SFuad Tabba * the code is in place for first run initialization at EL2. 5802a0c3433SFuad Tabba */ 5812a0c3433SFuad Tabba if (kvm_vm_is_protected(kvm)) 5822a0c3433SFuad Tabba kvm_call_hyp_nvhe(__pkvm_vcpu_init_traps, vcpu); 5832a0c3433SFuad Tabba 5845177fe91SMarc Zyngier mutex_lock(&kvm->lock); 58506394531SMarc Zyngier set_bit(KVM_ARCH_FLAG_HAS_RAN_ONCE, &kvm->arch.flags); 5865177fe91SMarc Zyngier mutex_unlock(&kvm->lock); 5875177fe91SMarc Zyngier 5889ed24f4bSMarc Zyngier return ret; 5899ed24f4bSMarc Zyngier } 5909ed24f4bSMarc Zyngier 5919ed24f4bSMarc Zyngier bool kvm_arch_intc_initialized(struct kvm *kvm) 5929ed24f4bSMarc Zyngier { 5939ed24f4bSMarc Zyngier return vgic_initialized(kvm); 5949ed24f4bSMarc Zyngier } 5959ed24f4bSMarc Zyngier 5969ed24f4bSMarc Zyngier void kvm_arm_halt_guest(struct kvm *kvm) 5979ed24f4bSMarc Zyngier { 59846808a4cSMarc Zyngier unsigned long i; 5999ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu; 6009ed24f4bSMarc Zyngier 6019ed24f4bSMarc Zyngier kvm_for_each_vcpu(i, vcpu, kvm) 6029ed24f4bSMarc Zyngier vcpu->arch.pause = true; 6039ed24f4bSMarc Zyngier kvm_make_all_cpus_request(kvm, KVM_REQ_SLEEP); 6049ed24f4bSMarc Zyngier } 6059ed24f4bSMarc Zyngier 6069ed24f4bSMarc Zyngier void kvm_arm_resume_guest(struct kvm *kvm) 6079ed24f4bSMarc Zyngier { 60846808a4cSMarc Zyngier unsigned long i; 6099ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu; 6109ed24f4bSMarc Zyngier 6119ed24f4bSMarc Zyngier kvm_for_each_vcpu(i, vcpu, kvm) { 6129ed24f4bSMarc Zyngier vcpu->arch.pause = false; 613d92a5d1cSSean Christopherson __kvm_vcpu_wake_up(vcpu); 6149ed24f4bSMarc Zyngier } 6159ed24f4bSMarc Zyngier } 6169ed24f4bSMarc Zyngier 6171c6219e3SOliver Upton static void kvm_vcpu_sleep(struct kvm_vcpu *vcpu) 6189ed24f4bSMarc Zyngier { 61938060944SPaolo Bonzini struct rcuwait *wait = kvm_arch_vcpu_get_wait(vcpu); 6209ed24f4bSMarc Zyngier 62138060944SPaolo Bonzini rcuwait_wait_event(wait, 622b171f9bbSOliver Upton (!kvm_arm_vcpu_stopped(vcpu)) && (!vcpu->arch.pause), 62338060944SPaolo Bonzini TASK_INTERRUPTIBLE); 6249ed24f4bSMarc Zyngier 625b171f9bbSOliver Upton if (kvm_arm_vcpu_stopped(vcpu) || vcpu->arch.pause) { 6269ed24f4bSMarc Zyngier /* Awaken to handle a signal, request we sleep again later. */ 6279ed24f4bSMarc Zyngier kvm_make_request(KVM_REQ_SLEEP, vcpu); 6289ed24f4bSMarc Zyngier } 6299ed24f4bSMarc Zyngier 6309ed24f4bSMarc Zyngier /* 6319ed24f4bSMarc Zyngier * Make sure we will observe a potential reset request if we've 6329ed24f4bSMarc Zyngier * observed a change to the power state. Pairs with the smp_wmb() in 6339ed24f4bSMarc Zyngier * kvm_psci_vcpu_on(). 6349ed24f4bSMarc Zyngier */ 6359ed24f4bSMarc Zyngier smp_rmb(); 6369ed24f4bSMarc Zyngier } 6379ed24f4bSMarc Zyngier 6386109c5a6SSean Christopherson /** 6396109c5a6SSean Christopherson * kvm_vcpu_wfi - emulate Wait-For-Interrupt behavior 6406109c5a6SSean Christopherson * @vcpu: The VCPU pointer 6416109c5a6SSean Christopherson * 6426109c5a6SSean Christopherson * Suspend execution of a vCPU until a valid wake event is detected, i.e. until 6436109c5a6SSean Christopherson * the vCPU is runnable. The vCPU may or may not be scheduled out, depending 6446109c5a6SSean Christopherson * on when a wake event arrives, e.g. there may already be a pending wake event. 6456109c5a6SSean Christopherson */ 6466109c5a6SSean Christopherson void kvm_vcpu_wfi(struct kvm_vcpu *vcpu) 6476109c5a6SSean Christopherson { 6486109c5a6SSean Christopherson /* 6496109c5a6SSean Christopherson * Sync back the state of the GIC CPU interface so that we have 6506109c5a6SSean Christopherson * the latest PMR and group enables. This ensures that 6516109c5a6SSean Christopherson * kvm_arch_vcpu_runnable has up-to-date data to decide whether 6526109c5a6SSean Christopherson * we have pending interrupts, e.g. when determining if the 6536109c5a6SSean Christopherson * vCPU should block. 6546109c5a6SSean Christopherson * 6556109c5a6SSean Christopherson * For the same reason, we want to tell GICv4 that we need 6566109c5a6SSean Christopherson * doorbells to be signalled, should an interrupt become pending. 6576109c5a6SSean Christopherson */ 6586109c5a6SSean Christopherson preempt_disable(); 6596109c5a6SSean Christopherson kvm_vgic_vmcr_sync(vcpu); 6606109c5a6SSean Christopherson vgic_v4_put(vcpu, true); 6616109c5a6SSean Christopherson preempt_enable(); 6626109c5a6SSean Christopherson 66391b99ea7SSean Christopherson kvm_vcpu_halt(vcpu); 6646109c5a6SSean Christopherson kvm_clear_request(KVM_REQ_UNHALT, vcpu); 6656109c5a6SSean Christopherson 6666109c5a6SSean Christopherson preempt_disable(); 6676109c5a6SSean Christopherson vgic_v4_load(vcpu); 6686109c5a6SSean Christopherson preempt_enable(); 6696109c5a6SSean Christopherson } 6706109c5a6SSean Christopherson 6717b33a09dSOliver Upton static int kvm_vcpu_suspend(struct kvm_vcpu *vcpu) 6727b33a09dSOliver Upton { 6737b33a09dSOliver Upton if (!kvm_arm_vcpu_suspended(vcpu)) 6747b33a09dSOliver Upton return 1; 6757b33a09dSOliver Upton 6767b33a09dSOliver Upton kvm_vcpu_wfi(vcpu); 6777b33a09dSOliver Upton 6787b33a09dSOliver Upton /* 6797b33a09dSOliver Upton * The suspend state is sticky; we do not leave it until userspace 6807b33a09dSOliver Upton * explicitly marks the vCPU as runnable. Request that we suspend again 6817b33a09dSOliver Upton * later. 6827b33a09dSOliver Upton */ 6837b33a09dSOliver Upton kvm_make_request(KVM_REQ_SUSPEND, vcpu); 6847b33a09dSOliver Upton 6857b33a09dSOliver Upton /* 6867b33a09dSOliver Upton * Check to make sure the vCPU is actually runnable. If so, exit to 6877b33a09dSOliver Upton * userspace informing it of the wakeup condition. 6887b33a09dSOliver Upton */ 6897b33a09dSOliver Upton if (kvm_arch_vcpu_runnable(vcpu)) { 6907b33a09dSOliver Upton memset(&vcpu->run->system_event, 0, sizeof(vcpu->run->system_event)); 6917b33a09dSOliver Upton vcpu->run->system_event.type = KVM_SYSTEM_EVENT_WAKEUP; 6927b33a09dSOliver Upton vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT; 6937b33a09dSOliver Upton return 0; 6947b33a09dSOliver Upton } 6957b33a09dSOliver Upton 6967b33a09dSOliver Upton /* 6977b33a09dSOliver Upton * Otherwise, we were unblocked to process a different event, such as a 6987b33a09dSOliver Upton * pending signal. Return 1 and allow kvm_arch_vcpu_ioctl_run() to 6997b33a09dSOliver Upton * process the event. 7007b33a09dSOliver Upton */ 7017b33a09dSOliver Upton return 1; 7027b33a09dSOliver Upton } 7037b33a09dSOliver Upton 7043fdd0459SOliver Upton /** 7053fdd0459SOliver Upton * check_vcpu_requests - check and handle pending vCPU requests 7063fdd0459SOliver Upton * @vcpu: the VCPU pointer 7073fdd0459SOliver Upton * 7083fdd0459SOliver Upton * Return: 1 if we should enter the guest 7093fdd0459SOliver Upton * 0 if we should exit to userspace 7103fdd0459SOliver Upton * < 0 if we should exit to userspace, where the return value indicates 7113fdd0459SOliver Upton * an error 7123fdd0459SOliver Upton */ 7133fdd0459SOliver Upton static int check_vcpu_requests(struct kvm_vcpu *vcpu) 7149ed24f4bSMarc Zyngier { 7159ed24f4bSMarc Zyngier if (kvm_request_pending(vcpu)) { 7169ed24f4bSMarc Zyngier if (kvm_check_request(KVM_REQ_SLEEP, vcpu)) 7171c6219e3SOliver Upton kvm_vcpu_sleep(vcpu); 7189ed24f4bSMarc Zyngier 7199ed24f4bSMarc Zyngier if (kvm_check_request(KVM_REQ_VCPU_RESET, vcpu)) 7209ed24f4bSMarc Zyngier kvm_reset_vcpu(vcpu); 7219ed24f4bSMarc Zyngier 7229ed24f4bSMarc Zyngier /* 7239ed24f4bSMarc Zyngier * Clear IRQ_PENDING requests that were made to guarantee 7249ed24f4bSMarc Zyngier * that a VCPU sees new virtual interrupts. 7259ed24f4bSMarc Zyngier */ 7269ed24f4bSMarc Zyngier kvm_check_request(KVM_REQ_IRQ_PENDING, vcpu); 7279ed24f4bSMarc Zyngier 7289ed24f4bSMarc Zyngier if (kvm_check_request(KVM_REQ_RECORD_STEAL, vcpu)) 7299ed24f4bSMarc Zyngier kvm_update_stolen_time(vcpu); 7309ed24f4bSMarc Zyngier 7319ed24f4bSMarc Zyngier if (kvm_check_request(KVM_REQ_RELOAD_GICv4, vcpu)) { 7329ed24f4bSMarc Zyngier /* The distributor enable bits were changed */ 7339ed24f4bSMarc Zyngier preempt_disable(); 7349ed24f4bSMarc Zyngier vgic_v4_put(vcpu, false); 7359ed24f4bSMarc Zyngier vgic_v4_load(vcpu); 7369ed24f4bSMarc Zyngier preempt_enable(); 7379ed24f4bSMarc Zyngier } 738d0c94c49SMarc Zyngier 739d0c94c49SMarc Zyngier if (kvm_check_request(KVM_REQ_RELOAD_PMU, vcpu)) 740d0c94c49SMarc Zyngier kvm_pmu_handle_pmcr(vcpu, 741d0c94c49SMarc Zyngier __vcpu_sys_reg(vcpu, PMCR_EL0)); 7427b33a09dSOliver Upton 7437b33a09dSOliver Upton if (kvm_check_request(KVM_REQ_SUSPEND, vcpu)) 7447b33a09dSOliver Upton return kvm_vcpu_suspend(vcpu); 7459ed24f4bSMarc Zyngier } 7463fdd0459SOliver Upton 7473fdd0459SOliver Upton return 1; 7489ed24f4bSMarc Zyngier } 7499ed24f4bSMarc Zyngier 7502f6a49bbSWill Deacon static bool vcpu_mode_is_bad_32bit(struct kvm_vcpu *vcpu) 7512f6a49bbSWill Deacon { 7522f6a49bbSWill Deacon if (likely(!vcpu_mode_is_32bit(vcpu))) 7532f6a49bbSWill Deacon return false; 7542f6a49bbSWill Deacon 7552f6a49bbSWill Deacon return !system_supports_32bit_el0() || 7562f6a49bbSWill Deacon static_branch_unlikely(&arm64_mismatched_32bit_el0); 7572f6a49bbSWill Deacon } 7582f6a49bbSWill Deacon 7599ed24f4bSMarc Zyngier /** 7606caa5812SOliver Upton * kvm_vcpu_exit_request - returns true if the VCPU should *not* enter the guest 7616caa5812SOliver Upton * @vcpu: The VCPU pointer 7626caa5812SOliver Upton * @ret: Pointer to write optional return code 7636caa5812SOliver Upton * 7646caa5812SOliver Upton * Returns: true if the VCPU needs to return to a preemptible + interruptible 7656caa5812SOliver Upton * and skip guest entry. 7666caa5812SOliver Upton * 7676caa5812SOliver Upton * This function disambiguates between two different types of exits: exits to a 7686caa5812SOliver Upton * preemptible + interruptible kernel context and exits to userspace. For an 7696caa5812SOliver Upton * exit to userspace, this function will write the return code to ret and return 7706caa5812SOliver Upton * true. For an exit to preemptible + interruptible kernel context (i.e. check 7716caa5812SOliver Upton * for pending work and re-enter), return true without writing to ret. 7726caa5812SOliver Upton */ 7736caa5812SOliver Upton static bool kvm_vcpu_exit_request(struct kvm_vcpu *vcpu, int *ret) 7746caa5812SOliver Upton { 7756caa5812SOliver Upton struct kvm_run *run = vcpu->run; 7766caa5812SOliver Upton 7776caa5812SOliver Upton /* 7786caa5812SOliver Upton * If we're using a userspace irqchip, then check if we need 7796caa5812SOliver Upton * to tell a userspace irqchip about timer or PMU level 7806caa5812SOliver Upton * changes and if so, exit to userspace (the actual level 7816caa5812SOliver Upton * state gets updated in kvm_timer_update_run and 7826caa5812SOliver Upton * kvm_pmu_update_run below). 7836caa5812SOliver Upton */ 7846caa5812SOliver Upton if (static_branch_unlikely(&userspace_irqchip_in_use)) { 7856caa5812SOliver Upton if (kvm_timer_should_notify_user(vcpu) || 7866caa5812SOliver Upton kvm_pmu_should_notify_user(vcpu)) { 7876caa5812SOliver Upton *ret = -EINTR; 7886caa5812SOliver Upton run->exit_reason = KVM_EXIT_INTR; 7896caa5812SOliver Upton return true; 7906caa5812SOliver Upton } 7916caa5812SOliver Upton } 7926caa5812SOliver Upton 793583cda1bSAlexandru Elisei if (unlikely(vcpu_on_unsupported_cpu(vcpu))) { 794583cda1bSAlexandru Elisei run->exit_reason = KVM_EXIT_FAIL_ENTRY; 795583cda1bSAlexandru Elisei run->fail_entry.hardware_entry_failure_reason = KVM_EXIT_FAIL_ENTRY_CPU_UNSUPPORTED; 796583cda1bSAlexandru Elisei run->fail_entry.cpu = smp_processor_id(); 797583cda1bSAlexandru Elisei *ret = 0; 798583cda1bSAlexandru Elisei return true; 799583cda1bSAlexandru Elisei } 800583cda1bSAlexandru Elisei 8016caa5812SOliver Upton return kvm_request_pending(vcpu) || 8026caa5812SOliver Upton xfer_to_guest_mode_work_pending(); 8036caa5812SOliver Upton } 8046caa5812SOliver Upton 8058cfe148aSMark Rutland /* 8068cfe148aSMark Rutland * Actually run the vCPU, entering an RCU extended quiescent state (EQS) while 8078cfe148aSMark Rutland * the vCPU is running. 8088cfe148aSMark Rutland * 8098cfe148aSMark Rutland * This must be noinstr as instrumentation may make use of RCU, and this is not 8108cfe148aSMark Rutland * safe during the EQS. 8118cfe148aSMark Rutland */ 8128cfe148aSMark Rutland static int noinstr kvm_arm_vcpu_enter_exit(struct kvm_vcpu *vcpu) 8138cfe148aSMark Rutland { 8148cfe148aSMark Rutland int ret; 8158cfe148aSMark Rutland 8168cfe148aSMark Rutland guest_state_enter_irqoff(); 8178cfe148aSMark Rutland ret = kvm_call_hyp_ret(__kvm_vcpu_run, vcpu); 8188cfe148aSMark Rutland guest_state_exit_irqoff(); 8198cfe148aSMark Rutland 8208cfe148aSMark Rutland return ret; 8218cfe148aSMark Rutland } 8228cfe148aSMark Rutland 8236caa5812SOliver Upton /** 8249ed24f4bSMarc Zyngier * kvm_arch_vcpu_ioctl_run - the main VCPU run function to execute guest code 8259ed24f4bSMarc Zyngier * @vcpu: The VCPU pointer 8269ed24f4bSMarc Zyngier * 8279ed24f4bSMarc Zyngier * This function is called through the VCPU_RUN ioctl called from user space. It 8289ed24f4bSMarc Zyngier * will execute VM code in a loop until the time slice for the process is used 8299ed24f4bSMarc Zyngier * or some emulation is needed from user space in which case the function will 8309ed24f4bSMarc Zyngier * return with return value 0 and with the kvm_run structure filled in with the 8319ed24f4bSMarc Zyngier * required data for the requested emulation. 8329ed24f4bSMarc Zyngier */ 83338060944SPaolo Bonzini int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) 8349ed24f4bSMarc Zyngier { 83538060944SPaolo Bonzini struct kvm_run *run = vcpu->run; 8369ed24f4bSMarc Zyngier int ret; 8379ed24f4bSMarc Zyngier 8389ed24f4bSMarc Zyngier if (run->exit_reason == KVM_EXIT_MMIO) { 83974cc7e0cSTianjia Zhang ret = kvm_handle_mmio_return(vcpu); 8409ed24f4bSMarc Zyngier if (ret) 8419ed24f4bSMarc Zyngier return ret; 8429ed24f4bSMarc Zyngier } 8439ed24f4bSMarc Zyngier 8449ed24f4bSMarc Zyngier vcpu_load(vcpu); 8459ed24f4bSMarc Zyngier 846e3e880bbSZenghui Yu if (run->immediate_exit) { 847e3e880bbSZenghui Yu ret = -EINTR; 848e3e880bbSZenghui Yu goto out; 849e3e880bbSZenghui Yu } 850e3e880bbSZenghui Yu 8519ed24f4bSMarc Zyngier kvm_sigset_activate(vcpu); 8529ed24f4bSMarc Zyngier 8539ed24f4bSMarc Zyngier ret = 1; 8549ed24f4bSMarc Zyngier run->exit_reason = KVM_EXIT_UNKNOWN; 8559ed24f4bSMarc Zyngier while (ret > 0) { 8569ed24f4bSMarc Zyngier /* 8579ed24f4bSMarc Zyngier * Check conditions before entering the guest 8589ed24f4bSMarc Zyngier */ 8596caa5812SOliver Upton ret = xfer_to_guest_mode_handle_work(vcpu); 8606caa5812SOliver Upton if (!ret) 8616caa5812SOliver Upton ret = 1; 8629ed24f4bSMarc Zyngier 8633fdd0459SOliver Upton if (ret > 0) 8643fdd0459SOliver Upton ret = check_vcpu_requests(vcpu); 8659ed24f4bSMarc Zyngier 8669ed24f4bSMarc Zyngier /* 8679ed24f4bSMarc Zyngier * Preparing the interrupts to be injected also 8689ed24f4bSMarc Zyngier * involves poking the GIC, which must be done in a 8699ed24f4bSMarc Zyngier * non-preemptible context. 8709ed24f4bSMarc Zyngier */ 8719ed24f4bSMarc Zyngier preempt_disable(); 8729ed24f4bSMarc Zyngier 8733248136bSJulien Grall /* 8743248136bSJulien Grall * The VMID allocator only tracks active VMIDs per 8753248136bSJulien Grall * physical CPU, and therefore the VMID allocated may not be 8763248136bSJulien Grall * preserved on VMID roll-over if the task was preempted, 8773248136bSJulien Grall * making a thread's VMID inactive. So we need to call 8783248136bSJulien Grall * kvm_arm_vmid_update() in non-premptible context. 8793248136bSJulien Grall */ 8803248136bSJulien Grall kvm_arm_vmid_update(&vcpu->arch.hw_mmu->vmid); 8813248136bSJulien Grall 8829ed24f4bSMarc Zyngier kvm_pmu_flush_hwstate(vcpu); 8839ed24f4bSMarc Zyngier 8849ed24f4bSMarc Zyngier local_irq_disable(); 8859ed24f4bSMarc Zyngier 8869ed24f4bSMarc Zyngier kvm_vgic_flush_hwstate(vcpu); 8879ed24f4bSMarc Zyngier 8889ed24f4bSMarc Zyngier /* 8899ed24f4bSMarc Zyngier * Ensure we set mode to IN_GUEST_MODE after we disable 8909ed24f4bSMarc Zyngier * interrupts and before the final VCPU requests check. 8919ed24f4bSMarc Zyngier * See the comment in kvm_vcpu_exiting_guest_mode() and 8929ed24f4bSMarc Zyngier * Documentation/virt/kvm/vcpu-requests.rst 8939ed24f4bSMarc Zyngier */ 8949ed24f4bSMarc Zyngier smp_store_mb(vcpu->mode, IN_GUEST_MODE); 8959ed24f4bSMarc Zyngier 8966caa5812SOliver Upton if (ret <= 0 || kvm_vcpu_exit_request(vcpu, &ret)) { 8979ed24f4bSMarc Zyngier vcpu->mode = OUTSIDE_GUEST_MODE; 8989ed24f4bSMarc Zyngier isb(); /* Ensure work in x_flush_hwstate is committed */ 8999ed24f4bSMarc Zyngier kvm_pmu_sync_hwstate(vcpu); 9009ed24f4bSMarc Zyngier if (static_branch_unlikely(&userspace_irqchip_in_use)) 9013c5ff0c6SMarc Zyngier kvm_timer_sync_user(vcpu); 9029ed24f4bSMarc Zyngier kvm_vgic_sync_hwstate(vcpu); 9039ed24f4bSMarc Zyngier local_irq_enable(); 9049ed24f4bSMarc Zyngier preempt_enable(); 9059ed24f4bSMarc Zyngier continue; 9069ed24f4bSMarc Zyngier } 9079ed24f4bSMarc Zyngier 9089ed24f4bSMarc Zyngier kvm_arm_setup_debug(vcpu); 909af9a0e21SMarc Zyngier kvm_arch_vcpu_ctxflush_fp(vcpu); 9109ed24f4bSMarc Zyngier 9119ed24f4bSMarc Zyngier /************************************************************** 9129ed24f4bSMarc Zyngier * Enter the guest 9139ed24f4bSMarc Zyngier */ 9149ed24f4bSMarc Zyngier trace_kvm_entry(*vcpu_pc(vcpu)); 9158cfe148aSMark Rutland guest_timing_enter_irqoff(); 9169ed24f4bSMarc Zyngier 9178cfe148aSMark Rutland ret = kvm_arm_vcpu_enter_exit(vcpu); 9189ed24f4bSMarc Zyngier 9199ed24f4bSMarc Zyngier vcpu->mode = OUTSIDE_GUEST_MODE; 9209ed24f4bSMarc Zyngier vcpu->stat.exits++; 9219ed24f4bSMarc Zyngier /* 9229ed24f4bSMarc Zyngier * Back from guest 9239ed24f4bSMarc Zyngier *************************************************************/ 9249ed24f4bSMarc Zyngier 9259ed24f4bSMarc Zyngier kvm_arm_clear_debug(vcpu); 9269ed24f4bSMarc Zyngier 9279ed24f4bSMarc Zyngier /* 9289ed24f4bSMarc Zyngier * We must sync the PMU state before the vgic state so 9299ed24f4bSMarc Zyngier * that the vgic can properly sample the updated state of the 9309ed24f4bSMarc Zyngier * interrupt line. 9319ed24f4bSMarc Zyngier */ 9329ed24f4bSMarc Zyngier kvm_pmu_sync_hwstate(vcpu); 9339ed24f4bSMarc Zyngier 9349ed24f4bSMarc Zyngier /* 9359ed24f4bSMarc Zyngier * Sync the vgic state before syncing the timer state because 9369ed24f4bSMarc Zyngier * the timer code needs to know if the virtual timer 9379ed24f4bSMarc Zyngier * interrupts are active. 9389ed24f4bSMarc Zyngier */ 9399ed24f4bSMarc Zyngier kvm_vgic_sync_hwstate(vcpu); 9409ed24f4bSMarc Zyngier 9419ed24f4bSMarc Zyngier /* 9429ed24f4bSMarc Zyngier * Sync the timer hardware state before enabling interrupts as 9439ed24f4bSMarc Zyngier * we don't want vtimer interrupts to race with syncing the 9449ed24f4bSMarc Zyngier * timer virtual interrupt state. 9459ed24f4bSMarc Zyngier */ 9469ed24f4bSMarc Zyngier if (static_branch_unlikely(&userspace_irqchip_in_use)) 9473c5ff0c6SMarc Zyngier kvm_timer_sync_user(vcpu); 9489ed24f4bSMarc Zyngier 9499ed24f4bSMarc Zyngier kvm_arch_vcpu_ctxsync_fp(vcpu); 9509ed24f4bSMarc Zyngier 9519ed24f4bSMarc Zyngier /* 9528cfe148aSMark Rutland * We must ensure that any pending interrupts are taken before 9538cfe148aSMark Rutland * we exit guest timing so that timer ticks are accounted as 9548cfe148aSMark Rutland * guest time. Transiently unmask interrupts so that any 9558cfe148aSMark Rutland * pending interrupts are taken. 9569ed24f4bSMarc Zyngier * 9578cfe148aSMark Rutland * Per ARM DDI 0487G.b section D1.13.4, an ISB (or other 9588cfe148aSMark Rutland * context synchronization event) is necessary to ensure that 9598cfe148aSMark Rutland * pending interrupts are taken. 9609ed24f4bSMarc Zyngier */ 961f7659f8bSMarc Zyngier if (ARM_EXCEPTION_CODE(ret) == ARM_EXCEPTION_IRQ) { 9629ed24f4bSMarc Zyngier local_irq_enable(); 9638cfe148aSMark Rutland isb(); 9648cfe148aSMark Rutland local_irq_disable(); 965f7659f8bSMarc Zyngier } 9669ed24f4bSMarc Zyngier 9678cfe148aSMark Rutland guest_timing_exit_irqoff(); 9688cfe148aSMark Rutland 9698cfe148aSMark Rutland local_irq_enable(); 9708cfe148aSMark Rutland 9719ed24f4bSMarc Zyngier trace_kvm_exit(ret, kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu)); 9729ed24f4bSMarc Zyngier 9739ed24f4bSMarc Zyngier /* Exit types that need handling before we can be preempted */ 97474cc7e0cSTianjia Zhang handle_exit_early(vcpu, ret); 9759ed24f4bSMarc Zyngier 9769ed24f4bSMarc Zyngier preempt_enable(); 9779ed24f4bSMarc Zyngier 97822f55384SQais Yousef /* 97922f55384SQais Yousef * The ARMv8 architecture doesn't give the hypervisor 98022f55384SQais Yousef * a mechanism to prevent a guest from dropping to AArch32 EL0 98122f55384SQais Yousef * if implemented by the CPU. If we spot the guest in such 98222f55384SQais Yousef * state and that we decided it wasn't supposed to do so (like 98322f55384SQais Yousef * with the asymmetric AArch32 case), return to userspace with 98422f55384SQais Yousef * a fatal error. 98522f55384SQais Yousef */ 9862f6a49bbSWill Deacon if (vcpu_mode_is_bad_32bit(vcpu)) { 98722f55384SQais Yousef /* 98822f55384SQais Yousef * As we have caught the guest red-handed, decide that 98922f55384SQais Yousef * it isn't fit for purpose anymore by making the vcpu 99022f55384SQais Yousef * invalid. The VMM can try and fix it by issuing a 99122f55384SQais Yousef * KVM_ARM_VCPU_INIT if it really wants to. 99222f55384SQais Yousef */ 99322f55384SQais Yousef vcpu->arch.target = -1; 99422f55384SQais Yousef ret = ARM_EXCEPTION_IL; 99522f55384SQais Yousef } 99622f55384SQais Yousef 99774cc7e0cSTianjia Zhang ret = handle_exit(vcpu, ret); 9989ed24f4bSMarc Zyngier } 9999ed24f4bSMarc Zyngier 10009ed24f4bSMarc Zyngier /* Tell userspace about in-kernel device output levels */ 10019ed24f4bSMarc Zyngier if (unlikely(!irqchip_in_kernel(vcpu->kvm))) { 10029ed24f4bSMarc Zyngier kvm_timer_update_run(vcpu); 10039ed24f4bSMarc Zyngier kvm_pmu_update_run(vcpu); 10049ed24f4bSMarc Zyngier } 10059ed24f4bSMarc Zyngier 10069ed24f4bSMarc Zyngier kvm_sigset_deactivate(vcpu); 10079ed24f4bSMarc Zyngier 1008e3e880bbSZenghui Yu out: 100926778aaaSMarc Zyngier /* 101026778aaaSMarc Zyngier * In the unlikely event that we are returning to userspace 101126778aaaSMarc Zyngier * with pending exceptions or PC adjustment, commit these 101226778aaaSMarc Zyngier * adjustments in order to give userspace a consistent view of 101326778aaaSMarc Zyngier * the vcpu state. Note that this relies on __kvm_adjust_pc() 101426778aaaSMarc Zyngier * being preempt-safe on VHE. 101526778aaaSMarc Zyngier */ 101626778aaaSMarc Zyngier if (unlikely(vcpu->arch.flags & (KVM_ARM64_PENDING_EXCEPTION | 101726778aaaSMarc Zyngier KVM_ARM64_INCREMENT_PC))) 101826778aaaSMarc Zyngier kvm_call_hyp(__kvm_adjust_pc, vcpu); 101926778aaaSMarc Zyngier 10209ed24f4bSMarc Zyngier vcpu_put(vcpu); 10219ed24f4bSMarc Zyngier return ret; 10229ed24f4bSMarc Zyngier } 10239ed24f4bSMarc Zyngier 10249ed24f4bSMarc Zyngier static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level) 10259ed24f4bSMarc Zyngier { 10269ed24f4bSMarc Zyngier int bit_index; 10279ed24f4bSMarc Zyngier bool set; 10289ed24f4bSMarc Zyngier unsigned long *hcr; 10299ed24f4bSMarc Zyngier 10309ed24f4bSMarc Zyngier if (number == KVM_ARM_IRQ_CPU_IRQ) 10319ed24f4bSMarc Zyngier bit_index = __ffs(HCR_VI); 10329ed24f4bSMarc Zyngier else /* KVM_ARM_IRQ_CPU_FIQ */ 10339ed24f4bSMarc Zyngier bit_index = __ffs(HCR_VF); 10349ed24f4bSMarc Zyngier 10359ed24f4bSMarc Zyngier hcr = vcpu_hcr(vcpu); 10369ed24f4bSMarc Zyngier if (level) 10379ed24f4bSMarc Zyngier set = test_and_set_bit(bit_index, hcr); 10389ed24f4bSMarc Zyngier else 10399ed24f4bSMarc Zyngier set = test_and_clear_bit(bit_index, hcr); 10409ed24f4bSMarc Zyngier 10419ed24f4bSMarc Zyngier /* 10429ed24f4bSMarc Zyngier * If we didn't change anything, no need to wake up or kick other CPUs 10439ed24f4bSMarc Zyngier */ 10449ed24f4bSMarc Zyngier if (set == level) 10459ed24f4bSMarc Zyngier return 0; 10469ed24f4bSMarc Zyngier 10479ed24f4bSMarc Zyngier /* 10489ed24f4bSMarc Zyngier * The vcpu irq_lines field was updated, wake up sleeping VCPUs and 10499ed24f4bSMarc Zyngier * trigger a world-switch round on the running physical CPU to set the 10509ed24f4bSMarc Zyngier * virtual IRQ/FIQ fields in the HCR appropriately. 10519ed24f4bSMarc Zyngier */ 10529ed24f4bSMarc Zyngier kvm_make_request(KVM_REQ_IRQ_PENDING, vcpu); 10539ed24f4bSMarc Zyngier kvm_vcpu_kick(vcpu); 10549ed24f4bSMarc Zyngier 10559ed24f4bSMarc Zyngier return 0; 10569ed24f4bSMarc Zyngier } 10579ed24f4bSMarc Zyngier 10589ed24f4bSMarc Zyngier int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, 10599ed24f4bSMarc Zyngier bool line_status) 10609ed24f4bSMarc Zyngier { 10619ed24f4bSMarc Zyngier u32 irq = irq_level->irq; 10629ed24f4bSMarc Zyngier unsigned int irq_type, vcpu_idx, irq_num; 10639ed24f4bSMarc Zyngier int nrcpus = atomic_read(&kvm->online_vcpus); 10649ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu = NULL; 10659ed24f4bSMarc Zyngier bool level = irq_level->level; 10669ed24f4bSMarc Zyngier 10679ed24f4bSMarc Zyngier irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK; 10689ed24f4bSMarc Zyngier vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK; 10699ed24f4bSMarc Zyngier vcpu_idx += ((irq >> KVM_ARM_IRQ_VCPU2_SHIFT) & KVM_ARM_IRQ_VCPU2_MASK) * (KVM_ARM_IRQ_VCPU_MASK + 1); 10709ed24f4bSMarc Zyngier irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK; 10719ed24f4bSMarc Zyngier 10729ed24f4bSMarc Zyngier trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level); 10739ed24f4bSMarc Zyngier 10749ed24f4bSMarc Zyngier switch (irq_type) { 10759ed24f4bSMarc Zyngier case KVM_ARM_IRQ_TYPE_CPU: 10769ed24f4bSMarc Zyngier if (irqchip_in_kernel(kvm)) 10779ed24f4bSMarc Zyngier return -ENXIO; 10789ed24f4bSMarc Zyngier 10799ed24f4bSMarc Zyngier if (vcpu_idx >= nrcpus) 10809ed24f4bSMarc Zyngier return -EINVAL; 10819ed24f4bSMarc Zyngier 10829ed24f4bSMarc Zyngier vcpu = kvm_get_vcpu(kvm, vcpu_idx); 10839ed24f4bSMarc Zyngier if (!vcpu) 10849ed24f4bSMarc Zyngier return -EINVAL; 10859ed24f4bSMarc Zyngier 10869ed24f4bSMarc Zyngier if (irq_num > KVM_ARM_IRQ_CPU_FIQ) 10879ed24f4bSMarc Zyngier return -EINVAL; 10889ed24f4bSMarc Zyngier 10899ed24f4bSMarc Zyngier return vcpu_interrupt_line(vcpu, irq_num, level); 10909ed24f4bSMarc Zyngier case KVM_ARM_IRQ_TYPE_PPI: 10919ed24f4bSMarc Zyngier if (!irqchip_in_kernel(kvm)) 10929ed24f4bSMarc Zyngier return -ENXIO; 10939ed24f4bSMarc Zyngier 10949ed24f4bSMarc Zyngier if (vcpu_idx >= nrcpus) 10959ed24f4bSMarc Zyngier return -EINVAL; 10969ed24f4bSMarc Zyngier 10979ed24f4bSMarc Zyngier vcpu = kvm_get_vcpu(kvm, vcpu_idx); 10989ed24f4bSMarc Zyngier if (!vcpu) 10999ed24f4bSMarc Zyngier return -EINVAL; 11009ed24f4bSMarc Zyngier 11019ed24f4bSMarc Zyngier if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS) 11029ed24f4bSMarc Zyngier return -EINVAL; 11039ed24f4bSMarc Zyngier 11049ed24f4bSMarc Zyngier return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level, NULL); 11059ed24f4bSMarc Zyngier case KVM_ARM_IRQ_TYPE_SPI: 11069ed24f4bSMarc Zyngier if (!irqchip_in_kernel(kvm)) 11079ed24f4bSMarc Zyngier return -ENXIO; 11089ed24f4bSMarc Zyngier 11099ed24f4bSMarc Zyngier if (irq_num < VGIC_NR_PRIVATE_IRQS) 11109ed24f4bSMarc Zyngier return -EINVAL; 11119ed24f4bSMarc Zyngier 11129ed24f4bSMarc Zyngier return kvm_vgic_inject_irq(kvm, 0, irq_num, level, NULL); 11139ed24f4bSMarc Zyngier } 11149ed24f4bSMarc Zyngier 11159ed24f4bSMarc Zyngier return -EINVAL; 11169ed24f4bSMarc Zyngier } 11179ed24f4bSMarc Zyngier 11189ed24f4bSMarc Zyngier static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, 11199ed24f4bSMarc Zyngier const struct kvm_vcpu_init *init) 11209ed24f4bSMarc Zyngier { 11219ed24f4bSMarc Zyngier unsigned int i, ret; 11226b7982feSAnshuman Khandual u32 phys_target = kvm_target_cpu(); 11239ed24f4bSMarc Zyngier 11249ed24f4bSMarc Zyngier if (init->target != phys_target) 11259ed24f4bSMarc Zyngier return -EINVAL; 11269ed24f4bSMarc Zyngier 11279ed24f4bSMarc Zyngier /* 11289ed24f4bSMarc Zyngier * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must 11299ed24f4bSMarc Zyngier * use the same target. 11309ed24f4bSMarc Zyngier */ 11319ed24f4bSMarc Zyngier if (vcpu->arch.target != -1 && vcpu->arch.target != init->target) 11329ed24f4bSMarc Zyngier return -EINVAL; 11339ed24f4bSMarc Zyngier 11349ed24f4bSMarc Zyngier /* -ENOENT for unknown features, -EINVAL for invalid combinations. */ 11359ed24f4bSMarc Zyngier for (i = 0; i < sizeof(init->features) * 8; i++) { 11369ed24f4bSMarc Zyngier bool set = (init->features[i / 32] & (1 << (i % 32))); 11379ed24f4bSMarc Zyngier 11389ed24f4bSMarc Zyngier if (set && i >= KVM_VCPU_MAX_FEATURES) 11399ed24f4bSMarc Zyngier return -ENOENT; 11409ed24f4bSMarc Zyngier 11419ed24f4bSMarc Zyngier /* 11429ed24f4bSMarc Zyngier * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must 11439ed24f4bSMarc Zyngier * use the same feature set. 11449ed24f4bSMarc Zyngier */ 11459ed24f4bSMarc Zyngier if (vcpu->arch.target != -1 && i < KVM_VCPU_MAX_FEATURES && 11469ed24f4bSMarc Zyngier test_bit(i, vcpu->arch.features) != set) 11479ed24f4bSMarc Zyngier return -EINVAL; 11489ed24f4bSMarc Zyngier 11499ed24f4bSMarc Zyngier if (set) 11509ed24f4bSMarc Zyngier set_bit(i, vcpu->arch.features); 11519ed24f4bSMarc Zyngier } 11529ed24f4bSMarc Zyngier 11539ed24f4bSMarc Zyngier vcpu->arch.target = phys_target; 11549ed24f4bSMarc Zyngier 11559ed24f4bSMarc Zyngier /* Now we know what it is, we can reset it. */ 11569ed24f4bSMarc Zyngier ret = kvm_reset_vcpu(vcpu); 11579ed24f4bSMarc Zyngier if (ret) { 11589ed24f4bSMarc Zyngier vcpu->arch.target = -1; 11599ed24f4bSMarc Zyngier bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES); 11609ed24f4bSMarc Zyngier } 11619ed24f4bSMarc Zyngier 11629ed24f4bSMarc Zyngier return ret; 11639ed24f4bSMarc Zyngier } 11649ed24f4bSMarc Zyngier 11659ed24f4bSMarc Zyngier static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, 11669ed24f4bSMarc Zyngier struct kvm_vcpu_init *init) 11679ed24f4bSMarc Zyngier { 11689ed24f4bSMarc Zyngier int ret; 11699ed24f4bSMarc Zyngier 11709ed24f4bSMarc Zyngier ret = kvm_vcpu_set_target(vcpu, init); 11719ed24f4bSMarc Zyngier if (ret) 11729ed24f4bSMarc Zyngier return ret; 11739ed24f4bSMarc Zyngier 11749ed24f4bSMarc Zyngier /* 11759ed24f4bSMarc Zyngier * Ensure a rebooted VM will fault in RAM pages and detect if the 11769ed24f4bSMarc Zyngier * guest MMU is turned off and flush the caches as needed. 1177892713e9SZenghui Yu * 11787ae2f3dbSMarc Zyngier * S2FWB enforces all memory accesses to RAM being cacheable, 11797ae2f3dbSMarc Zyngier * ensuring that the data side is always coherent. We still 11807ae2f3dbSMarc Zyngier * need to invalidate the I-cache though, as FWB does *not* 11817ae2f3dbSMarc Zyngier * imply CTR_EL0.DIC. 11829ed24f4bSMarc Zyngier */ 1183cc5705fbSMarc Zyngier if (vcpu_has_run_once(vcpu)) { 11847ae2f3dbSMarc Zyngier if (!cpus_have_final_cap(ARM64_HAS_STAGE2_FWB)) 11859ed24f4bSMarc Zyngier stage2_unmap_vm(vcpu->kvm); 11867ae2f3dbSMarc Zyngier else 1187fade9c2cSFuad Tabba icache_inval_all_pou(); 11887ae2f3dbSMarc Zyngier } 11899ed24f4bSMarc Zyngier 11909ed24f4bSMarc Zyngier vcpu_reset_hcr(vcpu); 1191cd496228SFuad Tabba vcpu->arch.cptr_el2 = CPTR_EL2_DEFAULT; 11929ed24f4bSMarc Zyngier 11939ed24f4bSMarc Zyngier /* 11949ed24f4bSMarc Zyngier * Handle the "start in power-off" case. 11959ed24f4bSMarc Zyngier */ 11969ed24f4bSMarc Zyngier if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features)) 11971e579429SOliver Upton kvm_arm_vcpu_power_off(vcpu); 11989ed24f4bSMarc Zyngier else 1199b171f9bbSOliver Upton vcpu->arch.mp_state.mp_state = KVM_MP_STATE_RUNNABLE; 12009ed24f4bSMarc Zyngier 12019ed24f4bSMarc Zyngier return 0; 12029ed24f4bSMarc Zyngier } 12039ed24f4bSMarc Zyngier 12049ed24f4bSMarc Zyngier static int kvm_arm_vcpu_set_attr(struct kvm_vcpu *vcpu, 12059ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 12069ed24f4bSMarc Zyngier { 12079ed24f4bSMarc Zyngier int ret = -ENXIO; 12089ed24f4bSMarc Zyngier 12099ed24f4bSMarc Zyngier switch (attr->group) { 12109ed24f4bSMarc Zyngier default: 12119ed24f4bSMarc Zyngier ret = kvm_arm_vcpu_arch_set_attr(vcpu, attr); 12129ed24f4bSMarc Zyngier break; 12139ed24f4bSMarc Zyngier } 12149ed24f4bSMarc Zyngier 12159ed24f4bSMarc Zyngier return ret; 12169ed24f4bSMarc Zyngier } 12179ed24f4bSMarc Zyngier 12189ed24f4bSMarc Zyngier static int kvm_arm_vcpu_get_attr(struct kvm_vcpu *vcpu, 12199ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 12209ed24f4bSMarc Zyngier { 12219ed24f4bSMarc Zyngier int ret = -ENXIO; 12229ed24f4bSMarc Zyngier 12239ed24f4bSMarc Zyngier switch (attr->group) { 12249ed24f4bSMarc Zyngier default: 12259ed24f4bSMarc Zyngier ret = kvm_arm_vcpu_arch_get_attr(vcpu, attr); 12269ed24f4bSMarc Zyngier break; 12279ed24f4bSMarc Zyngier } 12289ed24f4bSMarc Zyngier 12299ed24f4bSMarc Zyngier return ret; 12309ed24f4bSMarc Zyngier } 12319ed24f4bSMarc Zyngier 12329ed24f4bSMarc Zyngier static int kvm_arm_vcpu_has_attr(struct kvm_vcpu *vcpu, 12339ed24f4bSMarc Zyngier struct kvm_device_attr *attr) 12349ed24f4bSMarc Zyngier { 12359ed24f4bSMarc Zyngier int ret = -ENXIO; 12369ed24f4bSMarc Zyngier 12379ed24f4bSMarc Zyngier switch (attr->group) { 12389ed24f4bSMarc Zyngier default: 12399ed24f4bSMarc Zyngier ret = kvm_arm_vcpu_arch_has_attr(vcpu, attr); 12409ed24f4bSMarc Zyngier break; 12419ed24f4bSMarc Zyngier } 12429ed24f4bSMarc Zyngier 12439ed24f4bSMarc Zyngier return ret; 12449ed24f4bSMarc Zyngier } 12459ed24f4bSMarc Zyngier 12469ed24f4bSMarc Zyngier static int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, 12479ed24f4bSMarc Zyngier struct kvm_vcpu_events *events) 12489ed24f4bSMarc Zyngier { 12499ed24f4bSMarc Zyngier memset(events, 0, sizeof(*events)); 12509ed24f4bSMarc Zyngier 12519ed24f4bSMarc Zyngier return __kvm_arm_vcpu_get_events(vcpu, events); 12529ed24f4bSMarc Zyngier } 12539ed24f4bSMarc Zyngier 12549ed24f4bSMarc Zyngier static int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, 12559ed24f4bSMarc Zyngier struct kvm_vcpu_events *events) 12569ed24f4bSMarc Zyngier { 12579ed24f4bSMarc Zyngier int i; 12589ed24f4bSMarc Zyngier 12599ed24f4bSMarc Zyngier /* check whether the reserved field is zero */ 12609ed24f4bSMarc Zyngier for (i = 0; i < ARRAY_SIZE(events->reserved); i++) 12619ed24f4bSMarc Zyngier if (events->reserved[i]) 12629ed24f4bSMarc Zyngier return -EINVAL; 12639ed24f4bSMarc Zyngier 12649ed24f4bSMarc Zyngier /* check whether the pad field is zero */ 12659ed24f4bSMarc Zyngier for (i = 0; i < ARRAY_SIZE(events->exception.pad); i++) 12669ed24f4bSMarc Zyngier if (events->exception.pad[i]) 12679ed24f4bSMarc Zyngier return -EINVAL; 12689ed24f4bSMarc Zyngier 12699ed24f4bSMarc Zyngier return __kvm_arm_vcpu_set_events(vcpu, events); 12709ed24f4bSMarc Zyngier } 12719ed24f4bSMarc Zyngier 12729ed24f4bSMarc Zyngier long kvm_arch_vcpu_ioctl(struct file *filp, 12739ed24f4bSMarc Zyngier unsigned int ioctl, unsigned long arg) 12749ed24f4bSMarc Zyngier { 12759ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu = filp->private_data; 12769ed24f4bSMarc Zyngier void __user *argp = (void __user *)arg; 12779ed24f4bSMarc Zyngier struct kvm_device_attr attr; 12789ed24f4bSMarc Zyngier long r; 12799ed24f4bSMarc Zyngier 12809ed24f4bSMarc Zyngier switch (ioctl) { 12819ed24f4bSMarc Zyngier case KVM_ARM_VCPU_INIT: { 12829ed24f4bSMarc Zyngier struct kvm_vcpu_init init; 12839ed24f4bSMarc Zyngier 12849ed24f4bSMarc Zyngier r = -EFAULT; 12859ed24f4bSMarc Zyngier if (copy_from_user(&init, argp, sizeof(init))) 12869ed24f4bSMarc Zyngier break; 12879ed24f4bSMarc Zyngier 12889ed24f4bSMarc Zyngier r = kvm_arch_vcpu_ioctl_vcpu_init(vcpu, &init); 12899ed24f4bSMarc Zyngier break; 12909ed24f4bSMarc Zyngier } 12919ed24f4bSMarc Zyngier case KVM_SET_ONE_REG: 12929ed24f4bSMarc Zyngier case KVM_GET_ONE_REG: { 12939ed24f4bSMarc Zyngier struct kvm_one_reg reg; 12949ed24f4bSMarc Zyngier 12959ed24f4bSMarc Zyngier r = -ENOEXEC; 12969ed24f4bSMarc Zyngier if (unlikely(!kvm_vcpu_initialized(vcpu))) 12979ed24f4bSMarc Zyngier break; 12989ed24f4bSMarc Zyngier 12999ed24f4bSMarc Zyngier r = -EFAULT; 13009ed24f4bSMarc Zyngier if (copy_from_user(®, argp, sizeof(reg))) 13019ed24f4bSMarc Zyngier break; 13029ed24f4bSMarc Zyngier 13036826c684SOliver Upton /* 13046826c684SOliver Upton * We could owe a reset due to PSCI. Handle the pending reset 13056826c684SOliver Upton * here to ensure userspace register accesses are ordered after 13066826c684SOliver Upton * the reset. 13076826c684SOliver Upton */ 13086826c684SOliver Upton if (kvm_check_request(KVM_REQ_VCPU_RESET, vcpu)) 13096826c684SOliver Upton kvm_reset_vcpu(vcpu); 13106826c684SOliver Upton 13119ed24f4bSMarc Zyngier if (ioctl == KVM_SET_ONE_REG) 13129ed24f4bSMarc Zyngier r = kvm_arm_set_reg(vcpu, ®); 13139ed24f4bSMarc Zyngier else 13149ed24f4bSMarc Zyngier r = kvm_arm_get_reg(vcpu, ®); 13159ed24f4bSMarc Zyngier break; 13169ed24f4bSMarc Zyngier } 13179ed24f4bSMarc Zyngier case KVM_GET_REG_LIST: { 13189ed24f4bSMarc Zyngier struct kvm_reg_list __user *user_list = argp; 13199ed24f4bSMarc Zyngier struct kvm_reg_list reg_list; 13209ed24f4bSMarc Zyngier unsigned n; 13219ed24f4bSMarc Zyngier 13229ed24f4bSMarc Zyngier r = -ENOEXEC; 13239ed24f4bSMarc Zyngier if (unlikely(!kvm_vcpu_initialized(vcpu))) 13249ed24f4bSMarc Zyngier break; 13259ed24f4bSMarc Zyngier 13269ed24f4bSMarc Zyngier r = -EPERM; 13279ed24f4bSMarc Zyngier if (!kvm_arm_vcpu_is_finalized(vcpu)) 13289ed24f4bSMarc Zyngier break; 13299ed24f4bSMarc Zyngier 13309ed24f4bSMarc Zyngier r = -EFAULT; 13319ed24f4bSMarc Zyngier if (copy_from_user(®_list, user_list, sizeof(reg_list))) 13329ed24f4bSMarc Zyngier break; 13339ed24f4bSMarc Zyngier n = reg_list.n; 13349ed24f4bSMarc Zyngier reg_list.n = kvm_arm_num_regs(vcpu); 13359ed24f4bSMarc Zyngier if (copy_to_user(user_list, ®_list, sizeof(reg_list))) 13369ed24f4bSMarc Zyngier break; 13379ed24f4bSMarc Zyngier r = -E2BIG; 13389ed24f4bSMarc Zyngier if (n < reg_list.n) 13399ed24f4bSMarc Zyngier break; 13409ed24f4bSMarc Zyngier r = kvm_arm_copy_reg_indices(vcpu, user_list->reg); 13419ed24f4bSMarc Zyngier break; 13429ed24f4bSMarc Zyngier } 13439ed24f4bSMarc Zyngier case KVM_SET_DEVICE_ATTR: { 13449ed24f4bSMarc Zyngier r = -EFAULT; 13459ed24f4bSMarc Zyngier if (copy_from_user(&attr, argp, sizeof(attr))) 13469ed24f4bSMarc Zyngier break; 13479ed24f4bSMarc Zyngier r = kvm_arm_vcpu_set_attr(vcpu, &attr); 13489ed24f4bSMarc Zyngier break; 13499ed24f4bSMarc Zyngier } 13509ed24f4bSMarc Zyngier case KVM_GET_DEVICE_ATTR: { 13519ed24f4bSMarc Zyngier r = -EFAULT; 13529ed24f4bSMarc Zyngier if (copy_from_user(&attr, argp, sizeof(attr))) 13539ed24f4bSMarc Zyngier break; 13549ed24f4bSMarc Zyngier r = kvm_arm_vcpu_get_attr(vcpu, &attr); 13559ed24f4bSMarc Zyngier break; 13569ed24f4bSMarc Zyngier } 13579ed24f4bSMarc Zyngier case KVM_HAS_DEVICE_ATTR: { 13589ed24f4bSMarc Zyngier r = -EFAULT; 13599ed24f4bSMarc Zyngier if (copy_from_user(&attr, argp, sizeof(attr))) 13609ed24f4bSMarc Zyngier break; 13619ed24f4bSMarc Zyngier r = kvm_arm_vcpu_has_attr(vcpu, &attr); 13629ed24f4bSMarc Zyngier break; 13639ed24f4bSMarc Zyngier } 13649ed24f4bSMarc Zyngier case KVM_GET_VCPU_EVENTS: { 13659ed24f4bSMarc Zyngier struct kvm_vcpu_events events; 13669ed24f4bSMarc Zyngier 13679ed24f4bSMarc Zyngier if (kvm_arm_vcpu_get_events(vcpu, &events)) 13689ed24f4bSMarc Zyngier return -EINVAL; 13699ed24f4bSMarc Zyngier 13709ed24f4bSMarc Zyngier if (copy_to_user(argp, &events, sizeof(events))) 13719ed24f4bSMarc Zyngier return -EFAULT; 13729ed24f4bSMarc Zyngier 13739ed24f4bSMarc Zyngier return 0; 13749ed24f4bSMarc Zyngier } 13759ed24f4bSMarc Zyngier case KVM_SET_VCPU_EVENTS: { 13769ed24f4bSMarc Zyngier struct kvm_vcpu_events events; 13779ed24f4bSMarc Zyngier 13789ed24f4bSMarc Zyngier if (copy_from_user(&events, argp, sizeof(events))) 13799ed24f4bSMarc Zyngier return -EFAULT; 13809ed24f4bSMarc Zyngier 13819ed24f4bSMarc Zyngier return kvm_arm_vcpu_set_events(vcpu, &events); 13829ed24f4bSMarc Zyngier } 13839ed24f4bSMarc Zyngier case KVM_ARM_VCPU_FINALIZE: { 13849ed24f4bSMarc Zyngier int what; 13859ed24f4bSMarc Zyngier 13869ed24f4bSMarc Zyngier if (!kvm_vcpu_initialized(vcpu)) 13879ed24f4bSMarc Zyngier return -ENOEXEC; 13889ed24f4bSMarc Zyngier 13899ed24f4bSMarc Zyngier if (get_user(what, (const int __user *)argp)) 13909ed24f4bSMarc Zyngier return -EFAULT; 13919ed24f4bSMarc Zyngier 13929ed24f4bSMarc Zyngier return kvm_arm_vcpu_finalize(vcpu, what); 13939ed24f4bSMarc Zyngier } 13949ed24f4bSMarc Zyngier default: 13959ed24f4bSMarc Zyngier r = -EINVAL; 13969ed24f4bSMarc Zyngier } 13979ed24f4bSMarc Zyngier 13989ed24f4bSMarc Zyngier return r; 13999ed24f4bSMarc Zyngier } 14009ed24f4bSMarc Zyngier 14019ed24f4bSMarc Zyngier void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot) 14029ed24f4bSMarc Zyngier { 14039ed24f4bSMarc Zyngier 14049ed24f4bSMarc Zyngier } 14059ed24f4bSMarc Zyngier 14069ed24f4bSMarc Zyngier void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm, 14076c9dd6d2SPaolo Bonzini const struct kvm_memory_slot *memslot) 14089ed24f4bSMarc Zyngier { 14099ed24f4bSMarc Zyngier kvm_flush_remote_tlbs(kvm); 14109ed24f4bSMarc Zyngier } 14119ed24f4bSMarc Zyngier 14129ed24f4bSMarc Zyngier static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm, 14139ed24f4bSMarc Zyngier struct kvm_arm_device_addr *dev_addr) 14149ed24f4bSMarc Zyngier { 14159ed24f4bSMarc Zyngier unsigned long dev_id, type; 14169ed24f4bSMarc Zyngier 14179ed24f4bSMarc Zyngier dev_id = (dev_addr->id & KVM_ARM_DEVICE_ID_MASK) >> 14189ed24f4bSMarc Zyngier KVM_ARM_DEVICE_ID_SHIFT; 14199ed24f4bSMarc Zyngier type = (dev_addr->id & KVM_ARM_DEVICE_TYPE_MASK) >> 14209ed24f4bSMarc Zyngier KVM_ARM_DEVICE_TYPE_SHIFT; 14219ed24f4bSMarc Zyngier 14229ed24f4bSMarc Zyngier switch (dev_id) { 14239ed24f4bSMarc Zyngier case KVM_ARM_DEVICE_VGIC_V2: 14249ed24f4bSMarc Zyngier if (!vgic_present) 14259ed24f4bSMarc Zyngier return -ENXIO; 14269ed24f4bSMarc Zyngier return kvm_vgic_addr(kvm, type, &dev_addr->addr, true); 14279ed24f4bSMarc Zyngier default: 14289ed24f4bSMarc Zyngier return -ENODEV; 14299ed24f4bSMarc Zyngier } 14309ed24f4bSMarc Zyngier } 14319ed24f4bSMarc Zyngier 14329ed24f4bSMarc Zyngier long kvm_arch_vm_ioctl(struct file *filp, 14339ed24f4bSMarc Zyngier unsigned int ioctl, unsigned long arg) 14349ed24f4bSMarc Zyngier { 14359ed24f4bSMarc Zyngier struct kvm *kvm = filp->private_data; 14369ed24f4bSMarc Zyngier void __user *argp = (void __user *)arg; 14379ed24f4bSMarc Zyngier 14389ed24f4bSMarc Zyngier switch (ioctl) { 14399ed24f4bSMarc Zyngier case KVM_CREATE_IRQCHIP: { 14409ed24f4bSMarc Zyngier int ret; 14419ed24f4bSMarc Zyngier if (!vgic_present) 14429ed24f4bSMarc Zyngier return -ENXIO; 14439ed24f4bSMarc Zyngier mutex_lock(&kvm->lock); 14449ed24f4bSMarc Zyngier ret = kvm_vgic_create(kvm, KVM_DEV_TYPE_ARM_VGIC_V2); 14459ed24f4bSMarc Zyngier mutex_unlock(&kvm->lock); 14469ed24f4bSMarc Zyngier return ret; 14479ed24f4bSMarc Zyngier } 14489ed24f4bSMarc Zyngier case KVM_ARM_SET_DEVICE_ADDR: { 14499ed24f4bSMarc Zyngier struct kvm_arm_device_addr dev_addr; 14509ed24f4bSMarc Zyngier 14519ed24f4bSMarc Zyngier if (copy_from_user(&dev_addr, argp, sizeof(dev_addr))) 14529ed24f4bSMarc Zyngier return -EFAULT; 14539ed24f4bSMarc Zyngier return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr); 14549ed24f4bSMarc Zyngier } 14559ed24f4bSMarc Zyngier case KVM_ARM_PREFERRED_TARGET: { 14569ed24f4bSMarc Zyngier struct kvm_vcpu_init init; 14579ed24f4bSMarc Zyngier 145808e873cbSYueHaibing kvm_vcpu_preferred_target(&init); 14599ed24f4bSMarc Zyngier 14609ed24f4bSMarc Zyngier if (copy_to_user(argp, &init, sizeof(init))) 14619ed24f4bSMarc Zyngier return -EFAULT; 14629ed24f4bSMarc Zyngier 14639ed24f4bSMarc Zyngier return 0; 14649ed24f4bSMarc Zyngier } 1465f0376edbSSteven Price case KVM_ARM_MTE_COPY_TAGS: { 1466f0376edbSSteven Price struct kvm_arm_copy_mte_tags copy_tags; 1467f0376edbSSteven Price 1468f0376edbSSteven Price if (copy_from_user(©_tags, argp, sizeof(copy_tags))) 1469f0376edbSSteven Price return -EFAULT; 1470f0376edbSSteven Price return kvm_vm_ioctl_mte_copy_tags(kvm, ©_tags); 1471f0376edbSSteven Price } 14729ed24f4bSMarc Zyngier default: 14739ed24f4bSMarc Zyngier return -EINVAL; 14749ed24f4bSMarc Zyngier } 14759ed24f4bSMarc Zyngier } 14769ed24f4bSMarc Zyngier 147730c95391SDavid Brazdil static unsigned long nvhe_percpu_size(void) 147830c95391SDavid Brazdil { 147930c95391SDavid Brazdil return (unsigned long)CHOOSE_NVHE_SYM(__per_cpu_end) - 148030c95391SDavid Brazdil (unsigned long)CHOOSE_NVHE_SYM(__per_cpu_start); 148130c95391SDavid Brazdil } 148230c95391SDavid Brazdil 148330c95391SDavid Brazdil static unsigned long nvhe_percpu_order(void) 148430c95391SDavid Brazdil { 148530c95391SDavid Brazdil unsigned long size = nvhe_percpu_size(); 148630c95391SDavid Brazdil 148730c95391SDavid Brazdil return size ? get_order(size) : 0; 148830c95391SDavid Brazdil } 148930c95391SDavid Brazdil 1490b881cdceSWill Deacon /* A lookup table holding the hypervisor VA for each vector slot */ 1491b881cdceSWill Deacon static void *hyp_spectre_vector_selector[BP_HARDEN_EL2_SLOTS]; 1492de5bcdb4SWill Deacon 1493b881cdceSWill Deacon static void kvm_init_vector_slot(void *base, enum arm64_hyp_spectre_vector slot) 1494b881cdceSWill Deacon { 1495bc1d2892SQuentin Perret hyp_spectre_vector_selector[slot] = __kvm_vector_slot2addr(base, slot); 14969ef2b48bSWill Deacon } 14979ef2b48bSWill Deacon 1498b881cdceSWill Deacon static int kvm_init_vector_slots(void) 1499b881cdceSWill Deacon { 1500b881cdceSWill Deacon int err; 1501b881cdceSWill Deacon void *base; 1502b881cdceSWill Deacon 1503b881cdceSWill Deacon base = kern_hyp_va(kvm_ksym_ref(__kvm_hyp_vector)); 1504b881cdceSWill Deacon kvm_init_vector_slot(base, HYP_VECTOR_DIRECT); 1505b881cdceSWill Deacon 1506b881cdceSWill Deacon base = kern_hyp_va(kvm_ksym_ref(__bp_harden_hyp_vecs)); 1507b881cdceSWill Deacon kvm_init_vector_slot(base, HYP_VECTOR_SPECTRE_DIRECT); 1508b881cdceSWill Deacon 15095bdf3437SJames Morse if (kvm_system_needs_idmapped_vectors() && !has_vhe()) { 1510b881cdceSWill Deacon err = create_hyp_exec_mappings(__pa_symbol(__bp_harden_hyp_vecs), 1511b881cdceSWill Deacon __BP_HARDEN_HYP_VECS_SZ, &base); 1512b881cdceSWill Deacon if (err) 1513b881cdceSWill Deacon return err; 1514b881cdceSWill Deacon } 15159ef2b48bSWill Deacon 1516b881cdceSWill Deacon kvm_init_vector_slot(base, HYP_VECTOR_INDIRECT); 1517b881cdceSWill Deacon kvm_init_vector_slot(base, HYP_VECTOR_SPECTRE_INDIRECT); 15189ef2b48bSWill Deacon return 0; 15199ef2b48bSWill Deacon } 15209ef2b48bSWill Deacon 15219cc77581SQuentin Perret static void cpu_prepare_hyp_mode(int cpu) 15229ed24f4bSMarc Zyngier { 15239cc77581SQuentin Perret struct kvm_nvhe_init_params *params = per_cpu_ptr_nvhe_sym(kvm_init_params, cpu); 1524d3e1086cSDavid Brazdil unsigned long tcr; 15259ed24f4bSMarc Zyngier 152671b3ec5fSDavid Brazdil /* 152771b3ec5fSDavid Brazdil * Calculate the raw per-cpu offset without a translation from the 152871b3ec5fSDavid Brazdil * kernel's mapping to the linear mapping, and store it in tpidr_el2 152971b3ec5fSDavid Brazdil * so that we can use adr_l to access per-cpu variables in EL2. 1530e1663372SSteven Price * Also drop the KASAN tag which gets in the way... 153171b3ec5fSDavid Brazdil */ 15329cc77581SQuentin Perret params->tpidr_el2 = (unsigned long)kasan_reset_tag(per_cpu_ptr_nvhe_sym(__per_cpu_start, cpu)) - 153330c95391SDavid Brazdil (unsigned long)kvm_ksym_ref(CHOOSE_NVHE_SYM(__per_cpu_start)); 153471b3ec5fSDavid Brazdil 1535d3e1086cSDavid Brazdil params->mair_el2 = read_sysreg(mair_el1); 1536d3e1086cSDavid Brazdil 1537d3e1086cSDavid Brazdil /* 1538d3e1086cSDavid Brazdil * The ID map may be configured to use an extended virtual address 1539d3e1086cSDavid Brazdil * range. This is only the case if system RAM is out of range for the 1540d3e1086cSDavid Brazdil * currently configured page size and VA_BITS, in which case we will 1541d3e1086cSDavid Brazdil * also need the extended virtual range for the HYP ID map, or we won't 1542d3e1086cSDavid Brazdil * be able to enable the EL2 MMU. 1543d3e1086cSDavid Brazdil * 1544d3e1086cSDavid Brazdil * However, at EL2, there is only one TTBR register, and we can't switch 1545d3e1086cSDavid Brazdil * between translation tables *and* update TCR_EL2.T0SZ at the same 1546d3e1086cSDavid Brazdil * time. Bottom line: we need to use the extended range with *both* our 1547d3e1086cSDavid Brazdil * translation tables. 1548d3e1086cSDavid Brazdil * 1549d3e1086cSDavid Brazdil * So use the same T0SZ value we use for the ID map. 1550d3e1086cSDavid Brazdil */ 1551d3e1086cSDavid Brazdil tcr = (read_sysreg(tcr_el1) & TCR_EL2_MASK) | TCR_EL2_RES1; 1552d3e1086cSDavid Brazdil tcr &= ~TCR_T0SZ_MASK; 1553d3e1086cSDavid Brazdil tcr |= (idmap_t0sz & GENMASK(TCR_TxSZ_WIDTH - 1, 0)) << TCR_T0SZ_OFFSET; 1554d3e1086cSDavid Brazdil params->tcr_el2 = tcr; 1555d3e1086cSDavid Brazdil 15569cc77581SQuentin Perret params->stack_hyp_va = kern_hyp_va(per_cpu(kvm_arm_hyp_stack_page, cpu) + PAGE_SIZE); 155763fec243SDavid Brazdil params->pgd_pa = kvm_mmu_get_httbr(); 1558734864c1SQuentin Perret if (is_protected_kvm_enabled()) 1559734864c1SQuentin Perret params->hcr_el2 = HCR_HOST_NVHE_PROTECTED_FLAGS; 1560734864c1SQuentin Perret else 1561734864c1SQuentin Perret params->hcr_el2 = HCR_HOST_NVHE_FLAGS; 1562734864c1SQuentin Perret params->vttbr = params->vtcr = 0; 156363fec243SDavid Brazdil 156463fec243SDavid Brazdil /* 156563fec243SDavid Brazdil * Flush the init params from the data cache because the struct will 156663fec243SDavid Brazdil * be read while the MMU is off. 156763fec243SDavid Brazdil */ 156863fec243SDavid Brazdil kvm_flush_dcache_to_poc(params, sizeof(*params)); 15699cc77581SQuentin Perret } 15709cc77581SQuentin Perret 1571bfa79a80SQuentin Perret static void hyp_install_host_vector(void) 15729cc77581SQuentin Perret { 15739cc77581SQuentin Perret struct kvm_nvhe_init_params *params; 15749cc77581SQuentin Perret struct arm_smccc_res res; 15759cc77581SQuentin Perret 15769cc77581SQuentin Perret /* Switch from the HYP stub to our own HYP init vector */ 15779cc77581SQuentin Perret __hyp_set_vectors(kvm_get_idmap_vector()); 15789ed24f4bSMarc Zyngier 157971b3ec5fSDavid Brazdil /* 158071b3ec5fSDavid Brazdil * Call initialization code, and switch to the full blown HYP code. 158171b3ec5fSDavid Brazdil * If the cpucaps haven't been finalized yet, something has gone very 158271b3ec5fSDavid Brazdil * wrong, and hyp will crash and burn when it uses any 158371b3ec5fSDavid Brazdil * cpus_have_const_cap() wrapper. 158471b3ec5fSDavid Brazdil */ 158571b3ec5fSDavid Brazdil BUG_ON(!system_capabilities_finalized()); 15869cc77581SQuentin Perret params = this_cpu_ptr_nvhe_sym(kvm_init_params); 158763fec243SDavid Brazdil arm_smccc_1_1_hvc(KVM_HOST_SMCCC_FUNC(__kvm_hyp_init), virt_to_phys(params), &res); 158804e4caa8SAndrew Scull WARN_ON(res.a0 != SMCCC_RET_SUCCESS); 1589bfa79a80SQuentin Perret } 1590bfa79a80SQuentin Perret 1591bfa79a80SQuentin Perret static void cpu_init_hyp_mode(void) 1592bfa79a80SQuentin Perret { 1593bfa79a80SQuentin Perret hyp_install_host_vector(); 159471b3ec5fSDavid Brazdil 159571b3ec5fSDavid Brazdil /* 159671b3ec5fSDavid Brazdil * Disabling SSBD on a non-VHE system requires us to enable SSBS 159771b3ec5fSDavid Brazdil * at EL2. 159871b3ec5fSDavid Brazdil */ 159971b3ec5fSDavid Brazdil if (this_cpu_has_cap(ARM64_SSBS) && 1600d63d975aSMarc Zyngier arm64_get_spectre_v4_state() == SPECTRE_VULNERABLE) { 160113aeb9b4SDavid Brazdil kvm_call_hyp_nvhe(__kvm_enable_ssbs); 160271b3ec5fSDavid Brazdil } 16039ed24f4bSMarc Zyngier } 16049ed24f4bSMarc Zyngier 16059ed24f4bSMarc Zyngier static void cpu_hyp_reset(void) 16069ed24f4bSMarc Zyngier { 16079ed24f4bSMarc Zyngier if (!is_kernel_in_hyp_mode()) 16089ed24f4bSMarc Zyngier __hyp_reset_vectors(); 16099ed24f4bSMarc Zyngier } 16109ed24f4bSMarc Zyngier 1611042c76a9SWill Deacon /* 1612042c76a9SWill Deacon * EL2 vectors can be mapped and rerouted in a number of ways, 1613042c76a9SWill Deacon * depending on the kernel configuration and CPU present: 1614042c76a9SWill Deacon * 1615042c76a9SWill Deacon * - If the CPU is affected by Spectre-v2, the hardening sequence is 1616042c76a9SWill Deacon * placed in one of the vector slots, which is executed before jumping 1617042c76a9SWill Deacon * to the real vectors. 1618042c76a9SWill Deacon * 1619c4792b6dSWill Deacon * - If the CPU also has the ARM64_SPECTRE_V3A cap, the slot 1620042c76a9SWill Deacon * containing the hardening sequence is mapped next to the idmap page, 1621042c76a9SWill Deacon * and executed before jumping to the real vectors. 1622042c76a9SWill Deacon * 1623c4792b6dSWill Deacon * - If the CPU only has the ARM64_SPECTRE_V3A cap, then an 1624042c76a9SWill Deacon * empty slot is selected, mapped next to the idmap page, and 1625042c76a9SWill Deacon * executed before jumping to the real vectors. 1626042c76a9SWill Deacon * 1627c4792b6dSWill Deacon * Note that ARM64_SPECTRE_V3A is somewhat incompatible with 1628042c76a9SWill Deacon * VHE, as we don't have hypervisor-specific mappings. If the system 1629042c76a9SWill Deacon * is VHE and yet selects this capability, it will be ignored. 1630042c76a9SWill Deacon */ 1631042c76a9SWill Deacon static void cpu_set_hyp_vector(void) 1632042c76a9SWill Deacon { 16336279017eSWill Deacon struct bp_hardening_data *data = this_cpu_ptr(&bp_hardening_data); 1634b881cdceSWill Deacon void *vector = hyp_spectre_vector_selector[data->slot]; 1635042c76a9SWill Deacon 1636bfa79a80SQuentin Perret if (!is_protected_kvm_enabled()) 1637b881cdceSWill Deacon *this_cpu_ptr_hyp_sym(kvm_hyp_vector) = (unsigned long)vector; 1638bfa79a80SQuentin Perret else 1639bfa79a80SQuentin Perret kvm_call_hyp_nvhe(__pkvm_cpu_set_vector, data->slot); 1640042c76a9SWill Deacon } 1641042c76a9SWill Deacon 16428579a185SWill Deacon static void cpu_hyp_init_context(void) 16439ed24f4bSMarc Zyngier { 16442a1198c9SDavid Brazdil kvm_init_host_cpu_context(&this_cpu_ptr_hyp_sym(kvm_host_data)->host_ctxt); 16459ed24f4bSMarc Zyngier 16468579a185SWill Deacon if (!is_kernel_in_hyp_mode()) 16478579a185SWill Deacon cpu_init_hyp_mode(); 16488579a185SWill Deacon } 16498579a185SWill Deacon 16508579a185SWill Deacon static void cpu_hyp_init_features(void) 16518579a185SWill Deacon { 16528579a185SWill Deacon cpu_set_hyp_vector(); 16538579a185SWill Deacon kvm_arm_init_debug(); 1654a0e47952SAndrew Scull 16559ed24f4bSMarc Zyngier if (is_kernel_in_hyp_mode()) 16569ed24f4bSMarc Zyngier kvm_timer_init_vhe(); 16579ed24f4bSMarc Zyngier 16589ed24f4bSMarc Zyngier if (vgic_present) 16599ed24f4bSMarc Zyngier kvm_vgic_init_cpu_hardware(); 16609ed24f4bSMarc Zyngier } 16619ed24f4bSMarc Zyngier 16628579a185SWill Deacon static void cpu_hyp_reinit(void) 16638579a185SWill Deacon { 16648579a185SWill Deacon cpu_hyp_reset(); 16658579a185SWill Deacon cpu_hyp_init_context(); 16668579a185SWill Deacon cpu_hyp_init_features(); 16678579a185SWill Deacon } 16688579a185SWill Deacon 16699ed24f4bSMarc Zyngier static void _kvm_arch_hardware_enable(void *discard) 16709ed24f4bSMarc Zyngier { 16719ed24f4bSMarc Zyngier if (!__this_cpu_read(kvm_arm_hardware_enabled)) { 16729ed24f4bSMarc Zyngier cpu_hyp_reinit(); 16739ed24f4bSMarc Zyngier __this_cpu_write(kvm_arm_hardware_enabled, 1); 16749ed24f4bSMarc Zyngier } 16759ed24f4bSMarc Zyngier } 16769ed24f4bSMarc Zyngier 16779ed24f4bSMarc Zyngier int kvm_arch_hardware_enable(void) 16789ed24f4bSMarc Zyngier { 16799ed24f4bSMarc Zyngier _kvm_arch_hardware_enable(NULL); 16809ed24f4bSMarc Zyngier return 0; 16819ed24f4bSMarc Zyngier } 16829ed24f4bSMarc Zyngier 16839ed24f4bSMarc Zyngier static void _kvm_arch_hardware_disable(void *discard) 16849ed24f4bSMarc Zyngier { 16859ed24f4bSMarc Zyngier if (__this_cpu_read(kvm_arm_hardware_enabled)) { 16869ed24f4bSMarc Zyngier cpu_hyp_reset(); 16879ed24f4bSMarc Zyngier __this_cpu_write(kvm_arm_hardware_enabled, 0); 16889ed24f4bSMarc Zyngier } 16899ed24f4bSMarc Zyngier } 16909ed24f4bSMarc Zyngier 16919ed24f4bSMarc Zyngier void kvm_arch_hardware_disable(void) 16929ed24f4bSMarc Zyngier { 1693fa8c3d65SDavid Brazdil if (!is_protected_kvm_enabled()) 16949ed24f4bSMarc Zyngier _kvm_arch_hardware_disable(NULL); 16959ed24f4bSMarc Zyngier } 16969ed24f4bSMarc Zyngier 16979ed24f4bSMarc Zyngier #ifdef CONFIG_CPU_PM 16989ed24f4bSMarc Zyngier static int hyp_init_cpu_pm_notifier(struct notifier_block *self, 16999ed24f4bSMarc Zyngier unsigned long cmd, 17009ed24f4bSMarc Zyngier void *v) 17019ed24f4bSMarc Zyngier { 17029ed24f4bSMarc Zyngier /* 17039ed24f4bSMarc Zyngier * kvm_arm_hardware_enabled is left with its old value over 17049ed24f4bSMarc Zyngier * PM_ENTER->PM_EXIT. It is used to indicate PM_EXIT should 17059ed24f4bSMarc Zyngier * re-enable hyp. 17069ed24f4bSMarc Zyngier */ 17079ed24f4bSMarc Zyngier switch (cmd) { 17089ed24f4bSMarc Zyngier case CPU_PM_ENTER: 17099ed24f4bSMarc Zyngier if (__this_cpu_read(kvm_arm_hardware_enabled)) 17109ed24f4bSMarc Zyngier /* 17119ed24f4bSMarc Zyngier * don't update kvm_arm_hardware_enabled here 17129ed24f4bSMarc Zyngier * so that the hardware will be re-enabled 17139ed24f4bSMarc Zyngier * when we resume. See below. 17149ed24f4bSMarc Zyngier */ 17159ed24f4bSMarc Zyngier cpu_hyp_reset(); 17169ed24f4bSMarc Zyngier 17179ed24f4bSMarc Zyngier return NOTIFY_OK; 17189ed24f4bSMarc Zyngier case CPU_PM_ENTER_FAILED: 17199ed24f4bSMarc Zyngier case CPU_PM_EXIT: 17209ed24f4bSMarc Zyngier if (__this_cpu_read(kvm_arm_hardware_enabled)) 17219ed24f4bSMarc Zyngier /* The hardware was enabled before suspend. */ 17229ed24f4bSMarc Zyngier cpu_hyp_reinit(); 17239ed24f4bSMarc Zyngier 17249ed24f4bSMarc Zyngier return NOTIFY_OK; 17259ed24f4bSMarc Zyngier 17269ed24f4bSMarc Zyngier default: 17279ed24f4bSMarc Zyngier return NOTIFY_DONE; 17289ed24f4bSMarc Zyngier } 17299ed24f4bSMarc Zyngier } 17309ed24f4bSMarc Zyngier 17319ed24f4bSMarc Zyngier static struct notifier_block hyp_init_cpu_pm_nb = { 17329ed24f4bSMarc Zyngier .notifier_call = hyp_init_cpu_pm_notifier, 17339ed24f4bSMarc Zyngier }; 17349ed24f4bSMarc Zyngier 173544362a3cSMarc Zyngier static void hyp_cpu_pm_init(void) 17369ed24f4bSMarc Zyngier { 1737fa8c3d65SDavid Brazdil if (!is_protected_kvm_enabled()) 17389ed24f4bSMarc Zyngier cpu_pm_register_notifier(&hyp_init_cpu_pm_nb); 17399ed24f4bSMarc Zyngier } 174044362a3cSMarc Zyngier static void hyp_cpu_pm_exit(void) 17419ed24f4bSMarc Zyngier { 1742fa8c3d65SDavid Brazdil if (!is_protected_kvm_enabled()) 17439ed24f4bSMarc Zyngier cpu_pm_unregister_notifier(&hyp_init_cpu_pm_nb); 17449ed24f4bSMarc Zyngier } 17459ed24f4bSMarc Zyngier #else 17469ed24f4bSMarc Zyngier static inline void hyp_cpu_pm_init(void) 17479ed24f4bSMarc Zyngier { 17489ed24f4bSMarc Zyngier } 17499ed24f4bSMarc Zyngier static inline void hyp_cpu_pm_exit(void) 17509ed24f4bSMarc Zyngier { 17519ed24f4bSMarc Zyngier } 17529ed24f4bSMarc Zyngier #endif 17539ed24f4bSMarc Zyngier 175494f5e8a4SDavid Brazdil static void init_cpu_logical_map(void) 175594f5e8a4SDavid Brazdil { 175694f5e8a4SDavid Brazdil unsigned int cpu; 175794f5e8a4SDavid Brazdil 175894f5e8a4SDavid Brazdil /* 175994f5e8a4SDavid Brazdil * Copy the MPIDR <-> logical CPU ID mapping to hyp. 176021ea4578SJulia Lawall * Only copy the set of online CPUs whose features have been checked 176194f5e8a4SDavid Brazdil * against the finalized system capabilities. The hypervisor will not 176294f5e8a4SDavid Brazdil * allow any other CPUs from the `possible` set to boot. 176394f5e8a4SDavid Brazdil */ 176494f5e8a4SDavid Brazdil for_each_online_cpu(cpu) 176561fe0c37SDavid Brazdil hyp_cpu_logical_map[cpu] = cpu_logical_map(cpu); 176694f5e8a4SDavid Brazdil } 176794f5e8a4SDavid Brazdil 1768767c973fSMarc Zyngier #define init_psci_0_1_impl_state(config, what) \ 1769767c973fSMarc Zyngier config.psci_0_1_ ## what ## _implemented = psci_ops.what 1770767c973fSMarc Zyngier 1771eeeee719SDavid Brazdil static bool init_psci_relay(void) 1772eeeee719SDavid Brazdil { 1773eeeee719SDavid Brazdil /* 1774eeeee719SDavid Brazdil * If PSCI has not been initialized, protected KVM cannot install 1775eeeee719SDavid Brazdil * itself on newly booted CPUs. 1776eeeee719SDavid Brazdil */ 1777eeeee719SDavid Brazdil if (!psci_ops.get_version) { 1778eeeee719SDavid Brazdil kvm_err("Cannot initialize protected mode without PSCI\n"); 1779eeeee719SDavid Brazdil return false; 1780eeeee719SDavid Brazdil } 1781eeeee719SDavid Brazdil 1782ff367fe4SDavid Brazdil kvm_host_psci_config.version = psci_ops.get_version(); 1783ff367fe4SDavid Brazdil 1784ff367fe4SDavid Brazdil if (kvm_host_psci_config.version == PSCI_VERSION(0, 1)) { 1785ff367fe4SDavid Brazdil kvm_host_psci_config.function_ids_0_1 = get_psci_0_1_function_ids(); 1786767c973fSMarc Zyngier init_psci_0_1_impl_state(kvm_host_psci_config, cpu_suspend); 1787767c973fSMarc Zyngier init_psci_0_1_impl_state(kvm_host_psci_config, cpu_on); 1788767c973fSMarc Zyngier init_psci_0_1_impl_state(kvm_host_psci_config, cpu_off); 1789767c973fSMarc Zyngier init_psci_0_1_impl_state(kvm_host_psci_config, migrate); 1790ff367fe4SDavid Brazdil } 1791eeeee719SDavid Brazdil return true; 1792eeeee719SDavid Brazdil } 1793eeeee719SDavid Brazdil 17949ed24f4bSMarc Zyngier static int init_subsystems(void) 17959ed24f4bSMarc Zyngier { 17969ed24f4bSMarc Zyngier int err = 0; 17979ed24f4bSMarc Zyngier 17989ed24f4bSMarc Zyngier /* 17999ed24f4bSMarc Zyngier * Enable hardware so that subsystem initialisation can access EL2. 18009ed24f4bSMarc Zyngier */ 18019ed24f4bSMarc Zyngier on_each_cpu(_kvm_arch_hardware_enable, NULL, 1); 18029ed24f4bSMarc Zyngier 18039ed24f4bSMarc Zyngier /* 18049ed24f4bSMarc Zyngier * Register CPU lower-power notifier 18059ed24f4bSMarc Zyngier */ 18069ed24f4bSMarc Zyngier hyp_cpu_pm_init(); 18079ed24f4bSMarc Zyngier 18089ed24f4bSMarc Zyngier /* 18099ed24f4bSMarc Zyngier * Init HYP view of VGIC 18109ed24f4bSMarc Zyngier */ 18119ed24f4bSMarc Zyngier err = kvm_vgic_hyp_init(); 18129ed24f4bSMarc Zyngier switch (err) { 18139ed24f4bSMarc Zyngier case 0: 18149ed24f4bSMarc Zyngier vgic_present = true; 18159ed24f4bSMarc Zyngier break; 18169ed24f4bSMarc Zyngier case -ENODEV: 18179ed24f4bSMarc Zyngier case -ENXIO: 18189ed24f4bSMarc Zyngier vgic_present = false; 18199ed24f4bSMarc Zyngier err = 0; 18209ed24f4bSMarc Zyngier break; 18219ed24f4bSMarc Zyngier default: 18229ed24f4bSMarc Zyngier goto out; 18239ed24f4bSMarc Zyngier } 18249ed24f4bSMarc Zyngier 18259ed24f4bSMarc Zyngier /* 18269ed24f4bSMarc Zyngier * Init HYP architected timer support 18279ed24f4bSMarc Zyngier */ 18289ed24f4bSMarc Zyngier err = kvm_timer_hyp_init(vgic_present); 18299ed24f4bSMarc Zyngier if (err) 18309ed24f4bSMarc Zyngier goto out; 18319ed24f4bSMarc Zyngier 183217ed14ebSSean Christopherson kvm_register_perf_callbacks(NULL); 183317ed14ebSSean Christopherson 18346ac4a5acSMarc Zyngier kvm_sys_reg_table_init(); 18359ed24f4bSMarc Zyngier 18369ed24f4bSMarc Zyngier out: 1837fa8c3d65SDavid Brazdil if (err || !is_protected_kvm_enabled()) 18389ed24f4bSMarc Zyngier on_each_cpu(_kvm_arch_hardware_disable, NULL, 1); 18399ed24f4bSMarc Zyngier 18409ed24f4bSMarc Zyngier return err; 18419ed24f4bSMarc Zyngier } 18429ed24f4bSMarc Zyngier 18439ed24f4bSMarc Zyngier static void teardown_hyp_mode(void) 18449ed24f4bSMarc Zyngier { 18459ed24f4bSMarc Zyngier int cpu; 18469ed24f4bSMarc Zyngier 18479ed24f4bSMarc Zyngier free_hyp_pgds(); 184830c95391SDavid Brazdil for_each_possible_cpu(cpu) { 18499ed24f4bSMarc Zyngier free_page(per_cpu(kvm_arm_hyp_stack_page, cpu)); 185030c95391SDavid Brazdil free_pages(kvm_arm_hyp_percpu_base[cpu], nvhe_percpu_order()); 185130c95391SDavid Brazdil } 18529ed24f4bSMarc Zyngier } 18539ed24f4bSMarc Zyngier 1854bfa79a80SQuentin Perret static int do_pkvm_init(u32 hyp_va_bits) 1855bfa79a80SQuentin Perret { 1856bfa79a80SQuentin Perret void *per_cpu_base = kvm_ksym_ref(kvm_arm_hyp_percpu_base); 1857bfa79a80SQuentin Perret int ret; 1858bfa79a80SQuentin Perret 1859bfa79a80SQuentin Perret preempt_disable(); 18608579a185SWill Deacon cpu_hyp_init_context(); 1861bfa79a80SQuentin Perret ret = kvm_call_hyp_nvhe(__pkvm_init, hyp_mem_base, hyp_mem_size, 1862bfa79a80SQuentin Perret num_possible_cpus(), kern_hyp_va(per_cpu_base), 1863bfa79a80SQuentin Perret hyp_va_bits); 18648579a185SWill Deacon cpu_hyp_init_features(); 18658579a185SWill Deacon 18668579a185SWill Deacon /* 18678579a185SWill Deacon * The stub hypercalls are now disabled, so set our local flag to 18688579a185SWill Deacon * prevent a later re-init attempt in kvm_arch_hardware_enable(). 18698579a185SWill Deacon */ 18708579a185SWill Deacon __this_cpu_write(kvm_arm_hardware_enabled, 1); 1871bfa79a80SQuentin Perret preempt_enable(); 1872bfa79a80SQuentin Perret 1873bfa79a80SQuentin Perret return ret; 1874bfa79a80SQuentin Perret } 1875bfa79a80SQuentin Perret 1876bfa79a80SQuentin Perret static int kvm_hyp_init_protection(u32 hyp_va_bits) 1877bfa79a80SQuentin Perret { 1878bfa79a80SQuentin Perret void *addr = phys_to_virt(hyp_mem_base); 1879bfa79a80SQuentin Perret int ret; 1880bfa79a80SQuentin Perret 18816c30bfb1SFuad Tabba kvm_nvhe_sym(id_aa64pfr0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64PFR0_EL1); 18826c30bfb1SFuad Tabba kvm_nvhe_sym(id_aa64pfr1_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64PFR1_EL1); 18836c30bfb1SFuad Tabba kvm_nvhe_sym(id_aa64isar0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64ISAR0_EL1); 18846c30bfb1SFuad Tabba kvm_nvhe_sym(id_aa64isar1_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64ISAR1_EL1); 1885def8c222SVladimir Murzin kvm_nvhe_sym(id_aa64isar2_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64ISAR2_EL1); 18867c419937SMarc Zyngier kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1); 18877c419937SMarc Zyngier kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1); 18886c30bfb1SFuad Tabba kvm_nvhe_sym(id_aa64mmfr2_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR2_EL1); 18897c419937SMarc Zyngier 1890bfa79a80SQuentin Perret ret = create_hyp_mappings(addr, addr + hyp_mem_size, PAGE_HYP); 1891bfa79a80SQuentin Perret if (ret) 1892bfa79a80SQuentin Perret return ret; 1893bfa79a80SQuentin Perret 1894bfa79a80SQuentin Perret ret = do_pkvm_init(hyp_va_bits); 1895bfa79a80SQuentin Perret if (ret) 1896bfa79a80SQuentin Perret return ret; 1897bfa79a80SQuentin Perret 1898bfa79a80SQuentin Perret free_hyp_pgds(); 1899bfa79a80SQuentin Perret 1900bfa79a80SQuentin Perret return 0; 1901bfa79a80SQuentin Perret } 1902bfa79a80SQuentin Perret 19039ed24f4bSMarc Zyngier /** 19049ed24f4bSMarc Zyngier * Inits Hyp-mode on all online CPUs 19059ed24f4bSMarc Zyngier */ 19069ed24f4bSMarc Zyngier static int init_hyp_mode(void) 19079ed24f4bSMarc Zyngier { 1908bfa79a80SQuentin Perret u32 hyp_va_bits; 19099ed24f4bSMarc Zyngier int cpu; 1910bfa79a80SQuentin Perret int err = -ENOMEM; 1911bfa79a80SQuentin Perret 1912bfa79a80SQuentin Perret /* 1913bfa79a80SQuentin Perret * The protected Hyp-mode cannot be initialized if the memory pool 1914bfa79a80SQuentin Perret * allocation has failed. 1915bfa79a80SQuentin Perret */ 1916bfa79a80SQuentin Perret if (is_protected_kvm_enabled() && !hyp_mem_base) 1917bfa79a80SQuentin Perret goto out_err; 19189ed24f4bSMarc Zyngier 19199ed24f4bSMarc Zyngier /* 19209ed24f4bSMarc Zyngier * Allocate Hyp PGD and setup Hyp identity mapping 19219ed24f4bSMarc Zyngier */ 1922bfa79a80SQuentin Perret err = kvm_mmu_init(&hyp_va_bits); 19239ed24f4bSMarc Zyngier if (err) 19249ed24f4bSMarc Zyngier goto out_err; 19259ed24f4bSMarc Zyngier 19269ed24f4bSMarc Zyngier /* 19279ed24f4bSMarc Zyngier * Allocate stack pages for Hypervisor-mode 19289ed24f4bSMarc Zyngier */ 19299ed24f4bSMarc Zyngier for_each_possible_cpu(cpu) { 19309ed24f4bSMarc Zyngier unsigned long stack_page; 19319ed24f4bSMarc Zyngier 19329ed24f4bSMarc Zyngier stack_page = __get_free_page(GFP_KERNEL); 19339ed24f4bSMarc Zyngier if (!stack_page) { 19349ed24f4bSMarc Zyngier err = -ENOMEM; 19359ed24f4bSMarc Zyngier goto out_err; 19369ed24f4bSMarc Zyngier } 19379ed24f4bSMarc Zyngier 19389ed24f4bSMarc Zyngier per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page; 19399ed24f4bSMarc Zyngier } 19409ed24f4bSMarc Zyngier 19419ed24f4bSMarc Zyngier /* 194230c95391SDavid Brazdil * Allocate and initialize pages for Hypervisor-mode percpu regions. 194330c95391SDavid Brazdil */ 194430c95391SDavid Brazdil for_each_possible_cpu(cpu) { 194530c95391SDavid Brazdil struct page *page; 194630c95391SDavid Brazdil void *page_addr; 194730c95391SDavid Brazdil 194830c95391SDavid Brazdil page = alloc_pages(GFP_KERNEL, nvhe_percpu_order()); 194930c95391SDavid Brazdil if (!page) { 195030c95391SDavid Brazdil err = -ENOMEM; 195130c95391SDavid Brazdil goto out_err; 195230c95391SDavid Brazdil } 195330c95391SDavid Brazdil 195430c95391SDavid Brazdil page_addr = page_address(page); 195530c95391SDavid Brazdil memcpy(page_addr, CHOOSE_NVHE_SYM(__per_cpu_start), nvhe_percpu_size()); 195630c95391SDavid Brazdil kvm_arm_hyp_percpu_base[cpu] = (unsigned long)page_addr; 195730c95391SDavid Brazdil } 195830c95391SDavid Brazdil 195930c95391SDavid Brazdil /* 19609ed24f4bSMarc Zyngier * Map the Hyp-code called directly from the host 19619ed24f4bSMarc Zyngier */ 19629ed24f4bSMarc Zyngier err = create_hyp_mappings(kvm_ksym_ref(__hyp_text_start), 19639ed24f4bSMarc Zyngier kvm_ksym_ref(__hyp_text_end), PAGE_HYP_EXEC); 19649ed24f4bSMarc Zyngier if (err) { 19659ed24f4bSMarc Zyngier kvm_err("Cannot map world-switch code\n"); 19669ed24f4bSMarc Zyngier goto out_err; 19679ed24f4bSMarc Zyngier } 19689ed24f4bSMarc Zyngier 196916174eeaSDavid Brazdil err = create_hyp_mappings(kvm_ksym_ref(__hyp_rodata_start), 197016174eeaSDavid Brazdil kvm_ksym_ref(__hyp_rodata_end), PAGE_HYP_RO); 19712d7bf218SDavid Brazdil if (err) { 197216174eeaSDavid Brazdil kvm_err("Cannot map .hyp.rodata section\n"); 19732d7bf218SDavid Brazdil goto out_err; 19742d7bf218SDavid Brazdil } 19752d7bf218SDavid Brazdil 19769ed24f4bSMarc Zyngier err = create_hyp_mappings(kvm_ksym_ref(__start_rodata), 19779ed24f4bSMarc Zyngier kvm_ksym_ref(__end_rodata), PAGE_HYP_RO); 19789ed24f4bSMarc Zyngier if (err) { 19799ed24f4bSMarc Zyngier kvm_err("Cannot map rodata section\n"); 19809ed24f4bSMarc Zyngier goto out_err; 19819ed24f4bSMarc Zyngier } 19829ed24f4bSMarc Zyngier 1983380e18adSQuentin Perret /* 1984380e18adSQuentin Perret * .hyp.bss is guaranteed to be placed at the beginning of the .bss 1985380e18adSQuentin Perret * section thanks to an assertion in the linker script. Map it RW and 1986380e18adSQuentin Perret * the rest of .bss RO. 1987380e18adSQuentin Perret */ 1988380e18adSQuentin Perret err = create_hyp_mappings(kvm_ksym_ref(__hyp_bss_start), 1989380e18adSQuentin Perret kvm_ksym_ref(__hyp_bss_end), PAGE_HYP); 1990380e18adSQuentin Perret if (err) { 1991380e18adSQuentin Perret kvm_err("Cannot map hyp bss section: %d\n", err); 1992380e18adSQuentin Perret goto out_err; 1993380e18adSQuentin Perret } 1994380e18adSQuentin Perret 1995380e18adSQuentin Perret err = create_hyp_mappings(kvm_ksym_ref(__hyp_bss_end), 19969ed24f4bSMarc Zyngier kvm_ksym_ref(__bss_stop), PAGE_HYP_RO); 19979ed24f4bSMarc Zyngier if (err) { 19989ed24f4bSMarc Zyngier kvm_err("Cannot map bss section\n"); 19999ed24f4bSMarc Zyngier goto out_err; 20009ed24f4bSMarc Zyngier } 20019ed24f4bSMarc Zyngier 20029ed24f4bSMarc Zyngier /* 20039ed24f4bSMarc Zyngier * Map the Hyp stack pages 20049ed24f4bSMarc Zyngier */ 20059ed24f4bSMarc Zyngier for_each_possible_cpu(cpu) { 20069ed24f4bSMarc Zyngier char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu); 20079ed24f4bSMarc Zyngier err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE, 20089ed24f4bSMarc Zyngier PAGE_HYP); 20099ed24f4bSMarc Zyngier 20109ed24f4bSMarc Zyngier if (err) { 20119ed24f4bSMarc Zyngier kvm_err("Cannot map hyp stack\n"); 20129ed24f4bSMarc Zyngier goto out_err; 20139ed24f4bSMarc Zyngier } 20149ed24f4bSMarc Zyngier } 20159ed24f4bSMarc Zyngier 20169ed24f4bSMarc Zyngier for_each_possible_cpu(cpu) { 201730c95391SDavid Brazdil char *percpu_begin = (char *)kvm_arm_hyp_percpu_base[cpu]; 201830c95391SDavid Brazdil char *percpu_end = percpu_begin + nvhe_percpu_size(); 20199ed24f4bSMarc Zyngier 20209cc77581SQuentin Perret /* Map Hyp percpu pages */ 202130c95391SDavid Brazdil err = create_hyp_mappings(percpu_begin, percpu_end, PAGE_HYP); 20229ed24f4bSMarc Zyngier if (err) { 202330c95391SDavid Brazdil kvm_err("Cannot map hyp percpu region\n"); 20246e3bfbb2SAndrew Scull goto out_err; 20256e3bfbb2SAndrew Scull } 20269cc77581SQuentin Perret 20279cc77581SQuentin Perret /* Prepare the CPU initialization parameters */ 20289cc77581SQuentin Perret cpu_prepare_hyp_mode(cpu); 20299ed24f4bSMarc Zyngier } 20309ed24f4bSMarc Zyngier 2031eeeee719SDavid Brazdil if (is_protected_kvm_enabled()) { 203294f5e8a4SDavid Brazdil init_cpu_logical_map(); 203394f5e8a4SDavid Brazdil 203452b9e265SWang Wensheng if (!init_psci_relay()) { 203552b9e265SWang Wensheng err = -ENODEV; 2036eeeee719SDavid Brazdil goto out_err; 2037eeeee719SDavid Brazdil } 203852b9e265SWang Wensheng } 2039eeeee719SDavid Brazdil 2040bfa79a80SQuentin Perret if (is_protected_kvm_enabled()) { 2041bfa79a80SQuentin Perret err = kvm_hyp_init_protection(hyp_va_bits); 2042bfa79a80SQuentin Perret if (err) { 2043bfa79a80SQuentin Perret kvm_err("Failed to init hyp memory protection\n"); 2044bfa79a80SQuentin Perret goto out_err; 2045bfa79a80SQuentin Perret } 2046bfa79a80SQuentin Perret } 20479ed24f4bSMarc Zyngier 20489ed24f4bSMarc Zyngier return 0; 20499ed24f4bSMarc Zyngier 20509ed24f4bSMarc Zyngier out_err: 20519ed24f4bSMarc Zyngier teardown_hyp_mode(); 20529ed24f4bSMarc Zyngier kvm_err("error initializing Hyp mode: %d\n", err); 20539ed24f4bSMarc Zyngier return err; 20549ed24f4bSMarc Zyngier } 20559ed24f4bSMarc Zyngier 20562f2e1a50SWill Deacon static void _kvm_host_prot_finalize(void *arg) 20571025c8c0SQuentin Perret { 20582f2e1a50SWill Deacon int *err = arg; 20592f2e1a50SWill Deacon 20602f2e1a50SWill Deacon if (WARN_ON(kvm_call_hyp_nvhe(__pkvm_prot_finalize))) 20612f2e1a50SWill Deacon WRITE_ONCE(*err, -EINVAL); 20622f2e1a50SWill Deacon } 20632f2e1a50SWill Deacon 20642f2e1a50SWill Deacon static int pkvm_drop_host_privileges(void) 20652f2e1a50SWill Deacon { 20662f2e1a50SWill Deacon int ret = 0; 20672f2e1a50SWill Deacon 20682f2e1a50SWill Deacon /* 20692f2e1a50SWill Deacon * Flip the static key upfront as that may no longer be possible 20702f2e1a50SWill Deacon * once the host stage 2 is installed. 20712f2e1a50SWill Deacon */ 20722f2e1a50SWill Deacon static_branch_enable(&kvm_protected_mode_initialized); 20732f2e1a50SWill Deacon on_each_cpu(_kvm_host_prot_finalize, &ret, 1); 20742f2e1a50SWill Deacon return ret; 20751025c8c0SQuentin Perret } 20761025c8c0SQuentin Perret 2077bfa79a80SQuentin Perret static int finalize_hyp_mode(void) 2078bfa79a80SQuentin Perret { 2079bfa79a80SQuentin Perret if (!is_protected_kvm_enabled()) 2080bfa79a80SQuentin Perret return 0; 2081bfa79a80SQuentin Perret 208247e6223cSMarc Zyngier /* 208347e6223cSMarc Zyngier * Exclude HYP BSS from kmemleak so that it doesn't get peeked 208447e6223cSMarc Zyngier * at, which would end badly once the section is inaccessible. 208547e6223cSMarc Zyngier * None of other sections should ever be introspected. 208647e6223cSMarc Zyngier */ 208747e6223cSMarc Zyngier kmemleak_free_part(__hyp_bss_start, __hyp_bss_end - __hyp_bss_start); 20882f2e1a50SWill Deacon return pkvm_drop_host_privileges(); 2089bfa79a80SQuentin Perret } 2090bfa79a80SQuentin Perret 20919ed24f4bSMarc Zyngier struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr) 20929ed24f4bSMarc Zyngier { 20939ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu; 209446808a4cSMarc Zyngier unsigned long i; 20959ed24f4bSMarc Zyngier 20969ed24f4bSMarc Zyngier mpidr &= MPIDR_HWID_BITMASK; 20979ed24f4bSMarc Zyngier kvm_for_each_vcpu(i, vcpu, kvm) { 20989ed24f4bSMarc Zyngier if (mpidr == kvm_vcpu_get_mpidr_aff(vcpu)) 20999ed24f4bSMarc Zyngier return vcpu; 21009ed24f4bSMarc Zyngier } 21019ed24f4bSMarc Zyngier return NULL; 21029ed24f4bSMarc Zyngier } 21039ed24f4bSMarc Zyngier 21049ed24f4bSMarc Zyngier bool kvm_arch_has_irq_bypass(void) 21059ed24f4bSMarc Zyngier { 21069ed24f4bSMarc Zyngier return true; 21079ed24f4bSMarc Zyngier } 21089ed24f4bSMarc Zyngier 21099ed24f4bSMarc Zyngier int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons, 21109ed24f4bSMarc Zyngier struct irq_bypass_producer *prod) 21119ed24f4bSMarc Zyngier { 21129ed24f4bSMarc Zyngier struct kvm_kernel_irqfd *irqfd = 21139ed24f4bSMarc Zyngier container_of(cons, struct kvm_kernel_irqfd, consumer); 21149ed24f4bSMarc Zyngier 21159ed24f4bSMarc Zyngier return kvm_vgic_v4_set_forwarding(irqfd->kvm, prod->irq, 21169ed24f4bSMarc Zyngier &irqfd->irq_entry); 21179ed24f4bSMarc Zyngier } 21189ed24f4bSMarc Zyngier void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons, 21199ed24f4bSMarc Zyngier struct irq_bypass_producer *prod) 21209ed24f4bSMarc Zyngier { 21219ed24f4bSMarc Zyngier struct kvm_kernel_irqfd *irqfd = 21229ed24f4bSMarc Zyngier container_of(cons, struct kvm_kernel_irqfd, consumer); 21239ed24f4bSMarc Zyngier 21249ed24f4bSMarc Zyngier kvm_vgic_v4_unset_forwarding(irqfd->kvm, prod->irq, 21259ed24f4bSMarc Zyngier &irqfd->irq_entry); 21269ed24f4bSMarc Zyngier } 21279ed24f4bSMarc Zyngier 21289ed24f4bSMarc Zyngier void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *cons) 21299ed24f4bSMarc Zyngier { 21309ed24f4bSMarc Zyngier struct kvm_kernel_irqfd *irqfd = 21319ed24f4bSMarc Zyngier container_of(cons, struct kvm_kernel_irqfd, consumer); 21329ed24f4bSMarc Zyngier 21339ed24f4bSMarc Zyngier kvm_arm_halt_guest(irqfd->kvm); 21349ed24f4bSMarc Zyngier } 21359ed24f4bSMarc Zyngier 21369ed24f4bSMarc Zyngier void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *cons) 21379ed24f4bSMarc Zyngier { 21389ed24f4bSMarc Zyngier struct kvm_kernel_irqfd *irqfd = 21399ed24f4bSMarc Zyngier container_of(cons, struct kvm_kernel_irqfd, consumer); 21409ed24f4bSMarc Zyngier 21419ed24f4bSMarc Zyngier kvm_arm_resume_guest(irqfd->kvm); 21429ed24f4bSMarc Zyngier } 21439ed24f4bSMarc Zyngier 21449ed24f4bSMarc Zyngier /** 21459ed24f4bSMarc Zyngier * Initialize Hyp-mode and memory mappings on all CPUs. 21469ed24f4bSMarc Zyngier */ 21479ed24f4bSMarc Zyngier int kvm_arch_init(void *opaque) 21489ed24f4bSMarc Zyngier { 21499ed24f4bSMarc Zyngier int err; 21509ed24f4bSMarc Zyngier bool in_hyp_mode; 21519ed24f4bSMarc Zyngier 21529ed24f4bSMarc Zyngier if (!is_hyp_mode_available()) { 21539ed24f4bSMarc Zyngier kvm_info("HYP mode not available\n"); 21549ed24f4bSMarc Zyngier return -ENODEV; 21559ed24f4bSMarc Zyngier } 21569ed24f4bSMarc Zyngier 2157b6a68b97SMarc Zyngier if (kvm_get_mode() == KVM_MODE_NONE) { 2158b6a68b97SMarc Zyngier kvm_info("KVM disabled from command line\n"); 2159b6a68b97SMarc Zyngier return -ENODEV; 2160b6a68b97SMarc Zyngier } 2161b6a68b97SMarc Zyngier 21629ed24f4bSMarc Zyngier in_hyp_mode = is_kernel_in_hyp_mode(); 21639ed24f4bSMarc Zyngier 216496d389caSRob Herring if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) || 216596d389caSRob Herring cpus_have_final_cap(ARM64_WORKAROUND_1508412)) 2166abf532ccSRob Herring kvm_info("Guests without required CPU erratum workarounds can deadlock system!\n" \ 2167abf532ccSRob Herring "Only trusted guests should be used on this system.\n"); 2168abf532ccSRob Herring 2169bf249d9eSAnshuman Khandual err = kvm_set_ipa_limit(); 21709ed24f4bSMarc Zyngier if (err) 21719ed24f4bSMarc Zyngier return err; 21729ed24f4bSMarc Zyngier 21739ed24f4bSMarc Zyngier err = kvm_arm_init_sve(); 21749ed24f4bSMarc Zyngier if (err) 21759ed24f4bSMarc Zyngier return err; 21769ed24f4bSMarc Zyngier 21773248136bSJulien Grall err = kvm_arm_vmid_alloc_init(); 21783248136bSJulien Grall if (err) { 21793248136bSJulien Grall kvm_err("Failed to initialize VMID allocator.\n"); 21803248136bSJulien Grall return err; 21813248136bSJulien Grall } 21823248136bSJulien Grall 21839ed24f4bSMarc Zyngier if (!in_hyp_mode) { 21849ed24f4bSMarc Zyngier err = init_hyp_mode(); 21859ed24f4bSMarc Zyngier if (err) 21869ed24f4bSMarc Zyngier goto out_err; 21879ed24f4bSMarc Zyngier } 21889ed24f4bSMarc Zyngier 2189b881cdceSWill Deacon err = kvm_init_vector_slots(); 2190b881cdceSWill Deacon if (err) { 2191b881cdceSWill Deacon kvm_err("Cannot initialise vector slots\n"); 2192b881cdceSWill Deacon goto out_err; 2193b881cdceSWill Deacon } 2194b881cdceSWill Deacon 21959ed24f4bSMarc Zyngier err = init_subsystems(); 21969ed24f4bSMarc Zyngier if (err) 21979ed24f4bSMarc Zyngier goto out_hyp; 21989ed24f4bSMarc Zyngier 2199bfa79a80SQuentin Perret if (!in_hyp_mode) { 2200bfa79a80SQuentin Perret err = finalize_hyp_mode(); 2201bfa79a80SQuentin Perret if (err) { 2202bfa79a80SQuentin Perret kvm_err("Failed to finalize Hyp protection\n"); 2203bfa79a80SQuentin Perret goto out_hyp; 2204bfa79a80SQuentin Perret } 2205bfa79a80SQuentin Perret } 2206bfa79a80SQuentin Perret 2207f19f6644SDavid Brazdil if (is_protected_kvm_enabled()) { 22083eb681fbSDavid Brazdil kvm_info("Protected nVHE mode initialized successfully\n"); 2209f19f6644SDavid Brazdil } else if (in_hyp_mode) { 22109ed24f4bSMarc Zyngier kvm_info("VHE mode initialized successfully\n"); 2211f19f6644SDavid Brazdil } else { 22129ed24f4bSMarc Zyngier kvm_info("Hyp mode initialized successfully\n"); 2213f19f6644SDavid Brazdil } 22149ed24f4bSMarc Zyngier 22159ed24f4bSMarc Zyngier return 0; 22169ed24f4bSMarc Zyngier 22179ed24f4bSMarc Zyngier out_hyp: 22189ed24f4bSMarc Zyngier hyp_cpu_pm_exit(); 22199ed24f4bSMarc Zyngier if (!in_hyp_mode) 22209ed24f4bSMarc Zyngier teardown_hyp_mode(); 22219ed24f4bSMarc Zyngier out_err: 22223248136bSJulien Grall kvm_arm_vmid_alloc_free(); 22239ed24f4bSMarc Zyngier return err; 22249ed24f4bSMarc Zyngier } 22259ed24f4bSMarc Zyngier 22269ed24f4bSMarc Zyngier /* NOP: Compiling as a module not supported */ 22279ed24f4bSMarc Zyngier void kvm_arch_exit(void) 22289ed24f4bSMarc Zyngier { 222917ed14ebSSean Christopherson kvm_unregister_perf_callbacks(); 22309ed24f4bSMarc Zyngier } 22319ed24f4bSMarc Zyngier 2232d8b369c4SDavid Brazdil static int __init early_kvm_mode_cfg(char *arg) 2233d8b369c4SDavid Brazdil { 2234d8b369c4SDavid Brazdil if (!arg) 2235d8b369c4SDavid Brazdil return -EINVAL; 2236d8b369c4SDavid Brazdil 2237d8b369c4SDavid Brazdil if (strcmp(arg, "protected") == 0) { 2238d8b369c4SDavid Brazdil kvm_mode = KVM_MODE_PROTECTED; 2239d8b369c4SDavid Brazdil return 0; 2240d8b369c4SDavid Brazdil } 2241d8b369c4SDavid Brazdil 2242b6a68b97SMarc Zyngier if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode())) { 2243b6a68b97SMarc Zyngier kvm_mode = KVM_MODE_DEFAULT; 22441945a067SMarc Zyngier return 0; 2245b6a68b97SMarc Zyngier } 2246b6a68b97SMarc Zyngier 2247b6a68b97SMarc Zyngier if (strcmp(arg, "none") == 0) { 2248b6a68b97SMarc Zyngier kvm_mode = KVM_MODE_NONE; 2249b6a68b97SMarc Zyngier return 0; 2250b6a68b97SMarc Zyngier } 22511945a067SMarc Zyngier 2252d8b369c4SDavid Brazdil return -EINVAL; 2253d8b369c4SDavid Brazdil } 2254d8b369c4SDavid Brazdil early_param("kvm-arm.mode", early_kvm_mode_cfg); 2255d8b369c4SDavid Brazdil 22563eb681fbSDavid Brazdil enum kvm_mode kvm_get_mode(void) 22573eb681fbSDavid Brazdil { 22583eb681fbSDavid Brazdil return kvm_mode; 22593eb681fbSDavid Brazdil } 22603eb681fbSDavid Brazdil 22619ed24f4bSMarc Zyngier static int arm_init(void) 22629ed24f4bSMarc Zyngier { 22639ed24f4bSMarc Zyngier int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); 22649ed24f4bSMarc Zyngier return rc; 22659ed24f4bSMarc Zyngier } 22669ed24f4bSMarc Zyngier 22679ed24f4bSMarc Zyngier module_init(arm_init); 2268