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>
199ed24f4bSMarc Zyngier #include <linux/kvm.h>
209ed24f4bSMarc Zyngier #include <linux/kvm_irqfd.h>
219ed24f4bSMarc Zyngier #include <linux/irqbypass.h>
229ed24f4bSMarc Zyngier #include <linux/sched/stat.h>
23eeeee719SDavid Brazdil #include <linux/psci.h>
249ed24f4bSMarc Zyngier #include <trace/events/kvm.h>
259ed24f4bSMarc Zyngier
269ed24f4bSMarc Zyngier #define CREATE_TRACE_POINTS
279ed24f4bSMarc Zyngier #include "trace_arm.h"
289ed24f4bSMarc Zyngier
299ed24f4bSMarc Zyngier #include <linux/uaccess.h>
309ed24f4bSMarc Zyngier #include <asm/ptrace.h>
319ed24f4bSMarc Zyngier #include <asm/mman.h>
329ed24f4bSMarc Zyngier #include <asm/tlbflush.h>
339ed24f4bSMarc Zyngier #include <asm/cacheflush.h>
349ed24f4bSMarc Zyngier #include <asm/cpufeature.h>
359ed24f4bSMarc Zyngier #include <asm/virt.h>
369ed24f4bSMarc Zyngier #include <asm/kvm_arm.h>
379ed24f4bSMarc Zyngier #include <asm/kvm_asm.h>
389ed24f4bSMarc Zyngier #include <asm/kvm_mmu.h>
39a77b31dcSMarc Zyngier #include <asm/kvm_nested.h>
409d0c063aSFuad Tabba #include <asm/kvm_pkvm.h>
419ed24f4bSMarc Zyngier #include <asm/kvm_emulate.h>
429ed24f4bSMarc Zyngier #include <asm/sections.h>
439ed24f4bSMarc Zyngier
449ed24f4bSMarc Zyngier #include <kvm/arm_hypercalls.h>
459ed24f4bSMarc Zyngier #include <kvm/arm_pmu.h>
469ed24f4bSMarc Zyngier #include <kvm/arm_psci.h>
479ed24f4bSMarc Zyngier
48d8b369c4SDavid Brazdil static enum kvm_mode kvm_mode = KVM_MODE_DEFAULT;
49d8b369c4SDavid Brazdil
5014ef9d04SMarc Zyngier DECLARE_KVM_HYP_PER_CPU(unsigned long, kvm_hyp_vector);
5114ef9d04SMarc Zyngier
52db129d48SKalesh Singh DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page);
5363fec243SDavid Brazdil DECLARE_KVM_NVHE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params);
549ed24f4bSMarc Zyngier
558c15c2a0SMostafa Saleh DECLARE_KVM_NVHE_PER_CPU(struct kvm_cpu_context, kvm_hyp_ctxt);
568c15c2a0SMostafa Saleh
57fa729bc7SSudeep Holla static bool vgic_present, kvm_arm_initialised;
589ed24f4bSMarc Zyngier
59733c758eSOliver Upton static DEFINE_PER_CPU(unsigned char, kvm_hyp_initialized);
609ed24f4bSMarc Zyngier DEFINE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
619ed24f4bSMarc Zyngier
is_kvm_arm_initialised(void)62fa729bc7SSudeep Holla bool is_kvm_arm_initialised(void)
63fa729bc7SSudeep Holla {
64fa729bc7SSudeep Holla return kvm_arm_initialised;
65fa729bc7SSudeep Holla }
66fa729bc7SSudeep Holla
kvm_arch_vcpu_should_kick(struct kvm_vcpu * vcpu)679ed24f4bSMarc Zyngier int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
689ed24f4bSMarc Zyngier {
699ed24f4bSMarc Zyngier return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE;
709ed24f4bSMarc Zyngier }
719ed24f4bSMarc Zyngier
kvm_vm_ioctl_enable_cap(struct kvm * kvm,struct kvm_enable_cap * cap)729ed24f4bSMarc Zyngier int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
739ed24f4bSMarc Zyngier struct kvm_enable_cap *cap)
749ed24f4bSMarc Zyngier {
759ed24f4bSMarc Zyngier int r;
762f440b72SRicardo Koller u64 new_cap;
779ed24f4bSMarc Zyngier
789ed24f4bSMarc Zyngier if (cap->flags)
799ed24f4bSMarc Zyngier return -EINVAL;
809ed24f4bSMarc Zyngier
819ed24f4bSMarc Zyngier switch (cap->cap) {
829ed24f4bSMarc Zyngier case KVM_CAP_ARM_NISV_TO_USER:
839ed24f4bSMarc Zyngier r = 0;
8406394531SMarc Zyngier set_bit(KVM_ARCH_FLAG_RETURN_NISV_IO_ABORT_TO_USER,
8506394531SMarc Zyngier &kvm->arch.flags);
869ed24f4bSMarc Zyngier break;
87673638f4SSteven Price case KVM_CAP_ARM_MTE:
88c4d7c518SSteven Price mutex_lock(&kvm->lock);
89c4d7c518SSteven Price if (!system_supports_mte() || kvm->created_vcpus) {
90c4d7c518SSteven Price r = -EINVAL;
91c4d7c518SSteven Price } else {
92673638f4SSteven Price r = 0;
9306394531SMarc Zyngier set_bit(KVM_ARCH_FLAG_MTE_ENABLED, &kvm->arch.flags);
94c4d7c518SSteven Price }
95c4d7c518SSteven Price mutex_unlock(&kvm->lock);
96673638f4SSteven Price break;
97bfbab445SOliver Upton case KVM_CAP_ARM_SYSTEM_SUSPEND:
98bfbab445SOliver Upton r = 0;
99bfbab445SOliver Upton set_bit(KVM_ARCH_FLAG_SYSTEM_SUSPEND_ENABLED, &kvm->arch.flags);
100bfbab445SOliver Upton break;
1012f440b72SRicardo Koller case KVM_CAP_ARM_EAGER_SPLIT_CHUNK_SIZE:
1022f440b72SRicardo Koller new_cap = cap->args[0];
1032f440b72SRicardo Koller
1042f440b72SRicardo Koller mutex_lock(&kvm->slots_lock);
1052f440b72SRicardo Koller /*
1062f440b72SRicardo Koller * To keep things simple, allow changing the chunk
1072f440b72SRicardo Koller * size only when no memory slots have been created.
1082f440b72SRicardo Koller */
1092f440b72SRicardo Koller if (!kvm_are_all_memslots_empty(kvm)) {
1102f440b72SRicardo Koller r = -EINVAL;
1112f440b72SRicardo Koller } else if (new_cap && !kvm_is_block_size_supported(new_cap)) {
1122f440b72SRicardo Koller r = -EINVAL;
1132f440b72SRicardo Koller } else {
1142f440b72SRicardo Koller r = 0;
1152f440b72SRicardo Koller kvm->arch.mmu.split_page_chunk_size = new_cap;
1162f440b72SRicardo Koller }
1172f440b72SRicardo Koller mutex_unlock(&kvm->slots_lock);
1182f440b72SRicardo Koller break;
1199ed24f4bSMarc Zyngier default:
1209ed24f4bSMarc Zyngier r = -EINVAL;
1219ed24f4bSMarc Zyngier break;
1229ed24f4bSMarc Zyngier }
1239ed24f4bSMarc Zyngier
1249ed24f4bSMarc Zyngier return r;
1259ed24f4bSMarc Zyngier }
1269ed24f4bSMarc Zyngier
kvm_arm_default_max_vcpus(void)1275107000fSMarc Zyngier static int kvm_arm_default_max_vcpus(void)
1285107000fSMarc Zyngier {
1295107000fSMarc Zyngier return vgic_present ? kvm_vgic_get_max_vcpus() : KVM_MAX_VCPUS;
1305107000fSMarc Zyngier }
1315107000fSMarc Zyngier
1329ed24f4bSMarc Zyngier /**
1339ed24f4bSMarc Zyngier * kvm_arch_init_vm - initializes a VM data structure
1349ed24f4bSMarc Zyngier * @kvm: pointer to the KVM struct
1359ed24f4bSMarc Zyngier */
kvm_arch_init_vm(struct kvm * kvm,unsigned long type)1369ed24f4bSMarc Zyngier int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
1379ed24f4bSMarc Zyngier {
138a0e50aa3SChristoffer Dall int ret;
1399ed24f4bSMarc Zyngier
140c43120afSOliver Upton mutex_init(&kvm->arch.config_lock);
141c43120afSOliver Upton
142c43120afSOliver Upton #ifdef CONFIG_LOCKDEP
143c43120afSOliver Upton /* Clue in lockdep that the config_lock must be taken inside kvm->lock */
144c43120afSOliver Upton mutex_lock(&kvm->lock);
145c43120afSOliver Upton mutex_lock(&kvm->arch.config_lock);
146c43120afSOliver Upton mutex_unlock(&kvm->arch.config_lock);
147c43120afSOliver Upton mutex_unlock(&kvm->lock);
148c43120afSOliver Upton #endif
149c43120afSOliver Upton
1503f868e14SQuentin Perret ret = kvm_share_hyp(kvm, kvm + 1);
1519ed24f4bSMarc Zyngier if (ret)
152315775ffSQuentin Perret return ret;
1539ed24f4bSMarc Zyngier
1549d0c063aSFuad Tabba ret = pkvm_init_host_vm(kvm);
1559d0c063aSFuad Tabba if (ret)
156315775ffSQuentin Perret goto err_unshare_kvm;
1579ed24f4bSMarc Zyngier
1585f623a59SOliver Upton if (!zalloc_cpumask_var(&kvm->arch.supported_cpus, GFP_KERNEL_ACCOUNT)) {
159ae187fecSWill Deacon ret = -ENOMEM;
160315775ffSQuentin Perret goto err_unshare_kvm;
161ae187fecSWill Deacon }
162583cda1bSAlexandru Elisei cpumask_copy(kvm->arch.supported_cpus, cpu_possible_mask);
163583cda1bSAlexandru Elisei
164315775ffSQuentin Perret ret = kvm_init_stage2_mmu(kvm, &kvm->arch.mmu, type);
165315775ffSQuentin Perret if (ret)
166315775ffSQuentin Perret goto err_free_cpumask;
167315775ffSQuentin Perret
1689ed24f4bSMarc Zyngier kvm_vgic_early_init(kvm);
1699ed24f4bSMarc Zyngier
1708a5eb2d2SMarc Zyngier kvm_timer_init_vm(kvm);
1718a5eb2d2SMarc Zyngier
1729ed24f4bSMarc Zyngier /* The maximum number of VCPUs is limited by the host's GIC model */
173f502cc56SSean Christopherson kvm->max_vcpus = kvm_arm_default_max_vcpus();
1749ed24f4bSMarc Zyngier
17505714cabSRaghavendra Rao Ananta kvm_arm_init_hypercalls(kvm);
17623711a5eSMarc Zyngier
1772251e9ffSOliver Upton bitmap_zero(kvm->arch.vcpu_features, KVM_VCPU_MAX_FEATURES);
1783d0dba57SMarc Zyngier
179315775ffSQuentin Perret return 0;
180315775ffSQuentin Perret
181315775ffSQuentin Perret err_free_cpumask:
182315775ffSQuentin Perret free_cpumask_var(kvm->arch.supported_cpus);
183315775ffSQuentin Perret err_unshare_kvm:
184315775ffSQuentin Perret kvm_unshare_hyp(kvm, kvm + 1);
1859ed24f4bSMarc Zyngier return ret;
1869ed24f4bSMarc Zyngier }
1879ed24f4bSMarc Zyngier
kvm_arch_vcpu_fault(struct kvm_vcpu * vcpu,struct vm_fault * vmf)1889ed24f4bSMarc Zyngier vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
1899ed24f4bSMarc Zyngier {
1909ed24f4bSMarc Zyngier return VM_FAULT_SIGBUS;
1919ed24f4bSMarc Zyngier }
1929ed24f4bSMarc Zyngier
1939ed24f4bSMarc Zyngier
1949ed24f4bSMarc Zyngier /**
1959ed24f4bSMarc Zyngier * kvm_arch_destroy_vm - destroy the VM data structure
1969ed24f4bSMarc Zyngier * @kvm: pointer to the KVM struct
1979ed24f4bSMarc Zyngier */
kvm_arch_destroy_vm(struct kvm * kvm)1989ed24f4bSMarc Zyngier void kvm_arch_destroy_vm(struct kvm *kvm)
1999ed24f4bSMarc Zyngier {
200d7eec236SMarc Zyngier bitmap_free(kvm->arch.pmu_filter);
201583cda1bSAlexandru Elisei free_cpumask_var(kvm->arch.supported_cpus);
202d7eec236SMarc Zyngier
2039ed24f4bSMarc Zyngier kvm_vgic_destroy(kvm);
2049ed24f4bSMarc Zyngier
2059d0c063aSFuad Tabba if (is_protected_kvm_enabled())
2069d0c063aSFuad Tabba pkvm_destroy_hyp_vm(kvm);
2079d0c063aSFuad Tabba
20827592ae8SMarc Zyngier kvm_destroy_vcpus(kvm);
20952b28657SQuentin Perret
21052b28657SQuentin Perret kvm_unshare_hyp(kvm, kvm + 1);
211fb88707dSOliver Upton
212fb88707dSOliver Upton kvm_arm_teardown_hypercalls(kvm);
2139ed24f4bSMarc Zyngier }
2149ed24f4bSMarc Zyngier
kvm_vm_ioctl_check_extension(struct kvm * kvm,long ext)2159ed24f4bSMarc Zyngier int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
2169ed24f4bSMarc Zyngier {
2179ed24f4bSMarc Zyngier int r;
2189ed24f4bSMarc Zyngier switch (ext) {
2199ed24f4bSMarc Zyngier case KVM_CAP_IRQCHIP:
2209ed24f4bSMarc Zyngier r = vgic_present;
2219ed24f4bSMarc Zyngier break;
2229ed24f4bSMarc Zyngier case KVM_CAP_IOEVENTFD:
2239ed24f4bSMarc Zyngier case KVM_CAP_DEVICE_CTRL:
2249ed24f4bSMarc Zyngier case KVM_CAP_USER_MEMORY:
2259ed24f4bSMarc Zyngier case KVM_CAP_SYNC_MMU:
2269ed24f4bSMarc Zyngier case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
2279ed24f4bSMarc Zyngier case KVM_CAP_ONE_REG:
2289ed24f4bSMarc Zyngier case KVM_CAP_ARM_PSCI:
2299ed24f4bSMarc Zyngier case KVM_CAP_ARM_PSCI_0_2:
2309ed24f4bSMarc Zyngier case KVM_CAP_READONLY_MEM:
2319ed24f4bSMarc Zyngier case KVM_CAP_MP_STATE:
2329ed24f4bSMarc Zyngier case KVM_CAP_IMMEDIATE_EXIT:
2339ed24f4bSMarc Zyngier case KVM_CAP_VCPU_EVENTS:
2349ed24f4bSMarc Zyngier case KVM_CAP_ARM_IRQ_LINE_LAYOUT_2:
2359ed24f4bSMarc Zyngier case KVM_CAP_ARM_NISV_TO_USER:
2369ed24f4bSMarc Zyngier case KVM_CAP_ARM_INJECT_EXT_DABT:
23736fb4cd5SWill Deacon case KVM_CAP_SET_GUEST_DEBUG:
23836fb4cd5SWill Deacon case KVM_CAP_VCPU_ATTRIBUTES:
2393bf72569SJianyong Wu case KVM_CAP_PTP_KVM:
240bfbab445SOliver Upton case KVM_CAP_ARM_SYSTEM_SUSPEND:
24152882b9cSAlexey Kardashevskiy case KVM_CAP_IRQFD_RESAMPLE:
24230ec7997SMarc Zyngier case KVM_CAP_COUNTER_OFFSET:
2439ed24f4bSMarc Zyngier r = 1;
2449ed24f4bSMarc Zyngier break;
245fa18aca9SMaxim Levitsky case KVM_CAP_SET_GUEST_DEBUG2:
246fa18aca9SMaxim Levitsky return KVM_GUESTDBG_VALID_MASK;
2479ed24f4bSMarc Zyngier case KVM_CAP_ARM_SET_DEVICE_ADDR:
2489ed24f4bSMarc Zyngier r = 1;
2499ed24f4bSMarc Zyngier break;
2509ed24f4bSMarc Zyngier case KVM_CAP_NR_VCPUS:
251f60a00d7SVitaly Kuznetsov /*
252f60a00d7SVitaly Kuznetsov * ARM64 treats KVM_CAP_NR_CPUS differently from all other
253f60a00d7SVitaly Kuznetsov * architectures, as it does not always bound it to
254f60a00d7SVitaly Kuznetsov * KVM_CAP_MAX_VCPUS. It should not matter much because
255f60a00d7SVitaly Kuznetsov * this is just an advisory value.
256f60a00d7SVitaly Kuznetsov */
257f60a00d7SVitaly Kuznetsov r = min_t(unsigned int, num_online_cpus(),
258f60a00d7SVitaly Kuznetsov kvm_arm_default_max_vcpus());
2599ed24f4bSMarc Zyngier break;
2609ed24f4bSMarc Zyngier case KVM_CAP_MAX_VCPUS:
2619ed24f4bSMarc Zyngier case KVM_CAP_MAX_VCPU_ID:
2625107000fSMarc Zyngier if (kvm)
263f502cc56SSean Christopherson r = kvm->max_vcpus;
2645107000fSMarc Zyngier else
2655107000fSMarc Zyngier r = kvm_arm_default_max_vcpus();
2669ed24f4bSMarc Zyngier break;
2679ed24f4bSMarc Zyngier case KVM_CAP_MSI_DEVID:
2689ed24f4bSMarc Zyngier if (!kvm)
2699ed24f4bSMarc Zyngier r = -EINVAL;
2709ed24f4bSMarc Zyngier else
2719ed24f4bSMarc Zyngier r = kvm->arch.vgic.msis_require_devid;
2729ed24f4bSMarc Zyngier break;
2739ed24f4bSMarc Zyngier case KVM_CAP_ARM_USER_IRQ:
2749ed24f4bSMarc Zyngier /*
2759ed24f4bSMarc Zyngier * 1: EL1_VTIMER, EL1_PTIMER, and PMU.
2769ed24f4bSMarc Zyngier * (bump this number if adding more devices)
2779ed24f4bSMarc Zyngier */
2789ed24f4bSMarc Zyngier r = 1;
2799ed24f4bSMarc Zyngier break;
280673638f4SSteven Price case KVM_CAP_ARM_MTE:
281673638f4SSteven Price r = system_supports_mte();
282673638f4SSteven Price break;
283004a0124SAndrew Jones case KVM_CAP_STEAL_TIME:
284004a0124SAndrew Jones r = kvm_arm_pvtime_supported();
285004a0124SAndrew Jones break;
28636fb4cd5SWill Deacon case KVM_CAP_ARM_EL1_32BIT:
28736fb4cd5SWill Deacon r = cpus_have_const_cap(ARM64_HAS_32BIT_EL1);
2889ed24f4bSMarc Zyngier break;
28936fb4cd5SWill Deacon case KVM_CAP_GUEST_DEBUG_HW_BPS:
29036fb4cd5SWill Deacon r = get_num_brps();
29136fb4cd5SWill Deacon break;
29236fb4cd5SWill Deacon case KVM_CAP_GUEST_DEBUG_HW_WPS:
29336fb4cd5SWill Deacon r = get_num_wrps();
29436fb4cd5SWill Deacon break;
29536fb4cd5SWill Deacon case KVM_CAP_ARM_PMU_V3:
29636fb4cd5SWill Deacon r = kvm_arm_support_pmu_v3();
29736fb4cd5SWill Deacon break;
29836fb4cd5SWill Deacon case KVM_CAP_ARM_INJECT_SERROR_ESR:
29936fb4cd5SWill Deacon r = cpus_have_const_cap(ARM64_HAS_RAS_EXTN);
30036fb4cd5SWill Deacon break;
30136fb4cd5SWill Deacon case KVM_CAP_ARM_VM_IPA_SIZE:
30236fb4cd5SWill Deacon r = get_kvm_ipa_limit();
30336fb4cd5SWill Deacon break;
30436fb4cd5SWill Deacon case KVM_CAP_ARM_SVE:
30536fb4cd5SWill Deacon r = system_supports_sve();
30636fb4cd5SWill Deacon break;
30736fb4cd5SWill Deacon case KVM_CAP_ARM_PTRAUTH_ADDRESS:
30836fb4cd5SWill Deacon case KVM_CAP_ARM_PTRAUTH_GENERIC:
30936fb4cd5SWill Deacon r = system_has_full_ptr_auth();
31036fb4cd5SWill Deacon break;
3112f440b72SRicardo Koller case KVM_CAP_ARM_EAGER_SPLIT_CHUNK_SIZE:
3122f440b72SRicardo Koller if (kvm)
3132f440b72SRicardo Koller r = kvm->arch.mmu.split_page_chunk_size;
3142f440b72SRicardo Koller else
3152f440b72SRicardo Koller r = KVM_ARM_EAGER_SPLIT_CHUNK_SIZE_DEFAULT;
3162f440b72SRicardo Koller break;
3172f440b72SRicardo Koller case KVM_CAP_ARM_SUPPORTED_BLOCK_SIZES:
3182f440b72SRicardo Koller r = kvm_supported_block_sizes();
3192f440b72SRicardo Koller break;
32036fb4cd5SWill Deacon default:
32136fb4cd5SWill Deacon r = 0;
3229ed24f4bSMarc Zyngier }
32336fb4cd5SWill Deacon
3249ed24f4bSMarc Zyngier return r;
3259ed24f4bSMarc Zyngier }
3269ed24f4bSMarc Zyngier
kvm_arch_dev_ioctl(struct file * filp,unsigned int ioctl,unsigned long arg)3279ed24f4bSMarc Zyngier long kvm_arch_dev_ioctl(struct file *filp,
3289ed24f4bSMarc Zyngier unsigned int ioctl, unsigned long arg)
3299ed24f4bSMarc Zyngier {
3309ed24f4bSMarc Zyngier return -EINVAL;
3319ed24f4bSMarc Zyngier }
3329ed24f4bSMarc Zyngier
kvm_arch_alloc_vm(void)3339ed24f4bSMarc Zyngier struct kvm *kvm_arch_alloc_vm(void)
3349ed24f4bSMarc Zyngier {
335115bae92SJia He size_t sz = sizeof(struct kvm);
3369ed24f4bSMarc Zyngier
337115bae92SJia He if (!has_vhe())
338115bae92SJia He return kzalloc(sz, GFP_KERNEL_ACCOUNT);
339115bae92SJia He
340115bae92SJia He return __vmalloc(sz, GFP_KERNEL_ACCOUNT | __GFP_HIGHMEM | __GFP_ZERO);
3419ed24f4bSMarc Zyngier }
3429ed24f4bSMarc Zyngier
kvm_arch_vcpu_precreate(struct kvm * kvm,unsigned int id)3439ed24f4bSMarc Zyngier int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
3449ed24f4bSMarc Zyngier {
3459ed24f4bSMarc Zyngier if (irqchip_in_kernel(kvm) && vgic_initialized(kvm))
3469ed24f4bSMarc Zyngier return -EBUSY;
3479ed24f4bSMarc Zyngier
348f502cc56SSean Christopherson if (id >= kvm->max_vcpus)
3499ed24f4bSMarc Zyngier return -EINVAL;
3509ed24f4bSMarc Zyngier
3519ed24f4bSMarc Zyngier return 0;
3529ed24f4bSMarc Zyngier }
3539ed24f4bSMarc Zyngier
kvm_arch_vcpu_create(struct kvm_vcpu * vcpu)3549ed24f4bSMarc Zyngier int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
3559ed24f4bSMarc Zyngier {
3569ed24f4bSMarc Zyngier int err;
3579ed24f4bSMarc Zyngier
3580acc7239SOliver Upton spin_lock_init(&vcpu->arch.mp_state_lock);
3590acc7239SOliver Upton
360c43120afSOliver Upton #ifdef CONFIG_LOCKDEP
361c43120afSOliver Upton /* Inform lockdep that the config_lock is acquired after vcpu->mutex */
362c43120afSOliver Upton mutex_lock(&vcpu->mutex);
363c43120afSOliver Upton mutex_lock(&vcpu->kvm->arch.config_lock);
364c43120afSOliver Upton mutex_unlock(&vcpu->kvm->arch.config_lock);
365c43120afSOliver Upton mutex_unlock(&vcpu->mutex);
366c43120afSOliver Upton #endif
367c43120afSOliver Upton
3689ed24f4bSMarc Zyngier /* Force users to call KVM_ARM_VCPU_INIT */
369ef984060SOliver Upton vcpu_clear_flag(vcpu, VCPU_INITIALIZED);
3709ed24f4bSMarc Zyngier bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
3719ed24f4bSMarc Zyngier
372e539451bSSean Christopherson vcpu->arch.mmu_page_cache.gfp_zero = __GFP_ZERO;
373e539451bSSean Christopherson
374b4da9187SMarc Zyngier /*
375b4da9187SMarc Zyngier * Default value for the FP state, will be overloaded at load
376b4da9187SMarc Zyngier * time if we support FP (pretty likely)
377b4da9187SMarc Zyngier */
378b4da9187SMarc Zyngier vcpu->arch.fp_state = FP_STATE_FREE;
379b4da9187SMarc Zyngier
3809ed24f4bSMarc Zyngier /* Set up the timer */
3819ed24f4bSMarc Zyngier kvm_timer_vcpu_init(vcpu);
3829ed24f4bSMarc Zyngier
3839ed24f4bSMarc Zyngier kvm_pmu_vcpu_init(vcpu);
3849ed24f4bSMarc Zyngier
3859ed24f4bSMarc Zyngier kvm_arm_reset_debug_ptr(vcpu);
3869ed24f4bSMarc Zyngier
3879ed24f4bSMarc Zyngier kvm_arm_pvtime_vcpu_init(&vcpu->arch);
3889ed24f4bSMarc Zyngier
389a0e50aa3SChristoffer Dall vcpu->arch.hw_mmu = &vcpu->kvm->arch.mmu;
390a0e50aa3SChristoffer Dall
3919ed24f4bSMarc Zyngier err = kvm_vgic_vcpu_init(vcpu);
3929ed24f4bSMarc Zyngier if (err)
3939ed24f4bSMarc Zyngier return err;
3949ed24f4bSMarc Zyngier
3953f868e14SQuentin Perret return kvm_share_hyp(vcpu, vcpu + 1);
3969ed24f4bSMarc Zyngier }
3979ed24f4bSMarc Zyngier
kvm_arch_vcpu_postcreate(struct kvm_vcpu * vcpu)3989ed24f4bSMarc Zyngier void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
3999ed24f4bSMarc Zyngier {
4009ed24f4bSMarc Zyngier }
4019ed24f4bSMarc Zyngier
kvm_arch_vcpu_destroy(struct kvm_vcpu * vcpu)4029ed24f4bSMarc Zyngier void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
4039ed24f4bSMarc Zyngier {
404cc5705fbSMarc Zyngier if (vcpu_has_run_once(vcpu) && unlikely(!irqchip_in_kernel(vcpu->kvm)))
4059ed24f4bSMarc Zyngier static_branch_dec(&userspace_irqchip_in_use);
4069ed24f4bSMarc Zyngier
4079af3e08bSWill Deacon kvm_mmu_free_memory_cache(&vcpu->arch.mmu_page_cache);
4089ed24f4bSMarc Zyngier kvm_timer_vcpu_terminate(vcpu);
4099ed24f4bSMarc Zyngier kvm_pmu_vcpu_destroy(vcpu);
410*e13ce009SMarc Zyngier kvm_vgic_vcpu_destroy(vcpu);
4119ed24f4bSMarc Zyngier kvm_arm_vcpu_destroy(vcpu);
4129ed24f4bSMarc Zyngier }
4139ed24f4bSMarc Zyngier
kvm_arch_vcpu_blocking(struct kvm_vcpu * vcpu)4149ed24f4bSMarc Zyngier void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu)
4159ed24f4bSMarc Zyngier {
4166109c5a6SSean Christopherson
4179ed24f4bSMarc Zyngier }
4189ed24f4bSMarc Zyngier
kvm_arch_vcpu_unblocking(struct kvm_vcpu * vcpu)4199ed24f4bSMarc Zyngier void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)
4209ed24f4bSMarc Zyngier {
4216109c5a6SSean Christopherson
4229ed24f4bSMarc Zyngier }
4239ed24f4bSMarc Zyngier
kvm_arch_vcpu_load(struct kvm_vcpu * vcpu,int cpu)4249ed24f4bSMarc Zyngier void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
4259ed24f4bSMarc Zyngier {
426a0e50aa3SChristoffer Dall struct kvm_s2_mmu *mmu;
4279ed24f4bSMarc Zyngier int *last_ran;
4289ed24f4bSMarc Zyngier
429a0e50aa3SChristoffer Dall mmu = vcpu->arch.hw_mmu;
430a0e50aa3SChristoffer Dall last_ran = this_cpu_ptr(mmu->last_vcpu_ran);
4319ed24f4bSMarc Zyngier
4329ed24f4bSMarc Zyngier /*
43301dc9262SMarc Zyngier * We guarantee that both TLBs and I-cache are private to each
43401dc9262SMarc Zyngier * vcpu. If detecting that a vcpu from the same VM has
43501dc9262SMarc Zyngier * previously run on the same physical CPU, call into the
43601dc9262SMarc Zyngier * hypervisor code to nuke the relevant contexts.
43701dc9262SMarc Zyngier *
4389ed24f4bSMarc Zyngier * We might get preempted before the vCPU actually runs, but
4399ed24f4bSMarc Zyngier * over-invalidation doesn't affect correctness.
4409ed24f4bSMarc Zyngier */
4419ed24f4bSMarc Zyngier if (*last_ran != vcpu->vcpu_id) {
44201dc9262SMarc Zyngier kvm_call_hyp(__kvm_flush_cpu_context, mmu);
4439ed24f4bSMarc Zyngier *last_ran = vcpu->vcpu_id;
4449ed24f4bSMarc Zyngier }
4459ed24f4bSMarc Zyngier
4469ed24f4bSMarc Zyngier vcpu->cpu = cpu;
4479ed24f4bSMarc Zyngier
4489ed24f4bSMarc Zyngier kvm_vgic_load(vcpu);
4499ed24f4bSMarc Zyngier kvm_timer_vcpu_load(vcpu);
45013aeb9b4SDavid Brazdil if (has_vhe())
45113aeb9b4SDavid Brazdil kvm_vcpu_load_sysregs_vhe(vcpu);
4529ed24f4bSMarc Zyngier kvm_arch_vcpu_load_fp(vcpu);
4539ed24f4bSMarc Zyngier kvm_vcpu_pmu_restore_guest(vcpu);
4549ed24f4bSMarc Zyngier if (kvm_arm_is_pvtime_enabled(&vcpu->arch))
4559ed24f4bSMarc Zyngier kvm_make_request(KVM_REQ_RECORD_STEAL, vcpu);
4569ed24f4bSMarc Zyngier
4579ed24f4bSMarc Zyngier if (single_task_running())
4589ed24f4bSMarc Zyngier vcpu_clear_wfx_traps(vcpu);
4599ed24f4bSMarc Zyngier else
4609ed24f4bSMarc Zyngier vcpu_set_wfx_traps(vcpu);
4619ed24f4bSMarc Zyngier
46229eb5a3cSMarc Zyngier if (vcpu_has_ptrauth(vcpu))
463ef3e40a7SMarc Zyngier vcpu_ptrauth_disable(vcpu);
464d2602bb4SSuzuki K Poulose kvm_arch_vcpu_load_debug_state_flags(vcpu);
465583cda1bSAlexandru Elisei
4661ba11daeSShaoqin Huang if (!cpumask_test_cpu(cpu, vcpu->kvm->arch.supported_cpus))
467583cda1bSAlexandru Elisei vcpu_set_on_unsupported_cpu(vcpu);
4689ed24f4bSMarc Zyngier }
4699ed24f4bSMarc Zyngier
kvm_arch_vcpu_put(struct kvm_vcpu * vcpu)4709ed24f4bSMarc Zyngier void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
4719ed24f4bSMarc Zyngier {
472d2602bb4SSuzuki K Poulose kvm_arch_vcpu_put_debug_state_flags(vcpu);
4739ed24f4bSMarc Zyngier kvm_arch_vcpu_put_fp(vcpu);
47413aeb9b4SDavid Brazdil if (has_vhe())
47513aeb9b4SDavid Brazdil kvm_vcpu_put_sysregs_vhe(vcpu);
4769ed24f4bSMarc Zyngier kvm_timer_vcpu_put(vcpu);
4779ed24f4bSMarc Zyngier kvm_vgic_put(vcpu);
4789ed24f4bSMarc Zyngier kvm_vcpu_pmu_restore_host(vcpu);
479100b4f09SShameer Kolothum kvm_arm_vmid_clear_active();
4809ed24f4bSMarc Zyngier
481583cda1bSAlexandru Elisei vcpu_clear_on_unsupported_cpu(vcpu);
4829ed24f4bSMarc Zyngier vcpu->cpu = -1;
4839ed24f4bSMarc Zyngier }
4849ed24f4bSMarc Zyngier
__kvm_arm_vcpu_power_off(struct kvm_vcpu * vcpu)4850acc7239SOliver Upton static void __kvm_arm_vcpu_power_off(struct kvm_vcpu *vcpu)
4869ed24f4bSMarc Zyngier {
4870acc7239SOliver Upton WRITE_ONCE(vcpu->arch.mp_state.mp_state, KVM_MP_STATE_STOPPED);
4889ed24f4bSMarc Zyngier kvm_make_request(KVM_REQ_SLEEP, vcpu);
4899ed24f4bSMarc Zyngier kvm_vcpu_kick(vcpu);
4909ed24f4bSMarc Zyngier }
4919ed24f4bSMarc Zyngier
kvm_arm_vcpu_power_off(struct kvm_vcpu * vcpu)4920acc7239SOliver Upton void kvm_arm_vcpu_power_off(struct kvm_vcpu *vcpu)
4930acc7239SOliver Upton {
4940acc7239SOliver Upton spin_lock(&vcpu->arch.mp_state_lock);
4950acc7239SOliver Upton __kvm_arm_vcpu_power_off(vcpu);
4960acc7239SOliver Upton spin_unlock(&vcpu->arch.mp_state_lock);
4970acc7239SOliver Upton }
4980acc7239SOliver Upton
kvm_arm_vcpu_stopped(struct kvm_vcpu * vcpu)499b171f9bbSOliver Upton bool kvm_arm_vcpu_stopped(struct kvm_vcpu *vcpu)
500b171f9bbSOliver Upton {
5010acc7239SOliver Upton return READ_ONCE(vcpu->arch.mp_state.mp_state) == KVM_MP_STATE_STOPPED;
502b171f9bbSOliver Upton }
503b171f9bbSOliver Upton
kvm_arm_vcpu_suspend(struct kvm_vcpu * vcpu)5047b33a09dSOliver Upton static void kvm_arm_vcpu_suspend(struct kvm_vcpu *vcpu)
5057b33a09dSOliver Upton {
5060acc7239SOliver Upton WRITE_ONCE(vcpu->arch.mp_state.mp_state, KVM_MP_STATE_SUSPENDED);
5077b33a09dSOliver Upton kvm_make_request(KVM_REQ_SUSPEND, vcpu);
5087b33a09dSOliver Upton kvm_vcpu_kick(vcpu);
5097b33a09dSOliver Upton }
5107b33a09dSOliver Upton
kvm_arm_vcpu_suspended(struct kvm_vcpu * vcpu)5117b33a09dSOliver Upton static bool kvm_arm_vcpu_suspended(struct kvm_vcpu *vcpu)
5127b33a09dSOliver Upton {
5130acc7239SOliver Upton return READ_ONCE(vcpu->arch.mp_state.mp_state) == KVM_MP_STATE_SUSPENDED;
5147b33a09dSOliver Upton }
5157b33a09dSOliver Upton
kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu * vcpu,struct kvm_mp_state * mp_state)5169ed24f4bSMarc Zyngier int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
5179ed24f4bSMarc Zyngier struct kvm_mp_state *mp_state)
5189ed24f4bSMarc Zyngier {
5190acc7239SOliver Upton *mp_state = READ_ONCE(vcpu->arch.mp_state);
5209ed24f4bSMarc Zyngier
5219ed24f4bSMarc Zyngier return 0;
5229ed24f4bSMarc Zyngier }
5239ed24f4bSMarc Zyngier
kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu * vcpu,struct kvm_mp_state * mp_state)5249ed24f4bSMarc Zyngier int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
5259ed24f4bSMarc Zyngier struct kvm_mp_state *mp_state)
5269ed24f4bSMarc Zyngier {
5279ed24f4bSMarc Zyngier int ret = 0;
5289ed24f4bSMarc Zyngier
5290acc7239SOliver Upton spin_lock(&vcpu->arch.mp_state_lock);
5300acc7239SOliver Upton
5319ed24f4bSMarc Zyngier switch (mp_state->mp_state) {
5329ed24f4bSMarc Zyngier case KVM_MP_STATE_RUNNABLE:
5330acc7239SOliver Upton WRITE_ONCE(vcpu->arch.mp_state, *mp_state);
5349ed24f4bSMarc Zyngier break;
5359ed24f4bSMarc Zyngier case KVM_MP_STATE_STOPPED:
5360acc7239SOliver Upton __kvm_arm_vcpu_power_off(vcpu);
5379ed24f4bSMarc Zyngier break;
5387b33a09dSOliver Upton case KVM_MP_STATE_SUSPENDED:
5397b33a09dSOliver Upton kvm_arm_vcpu_suspend(vcpu);
5409ed24f4bSMarc Zyngier break;
5419ed24f4bSMarc Zyngier default:
5429ed24f4bSMarc Zyngier ret = -EINVAL;
5439ed24f4bSMarc Zyngier }
5449ed24f4bSMarc Zyngier
5450acc7239SOliver Upton spin_unlock(&vcpu->arch.mp_state_lock);
5460acc7239SOliver Upton
5479ed24f4bSMarc Zyngier return ret;
5489ed24f4bSMarc Zyngier }
5499ed24f4bSMarc Zyngier
5509ed24f4bSMarc Zyngier /**
5519ed24f4bSMarc Zyngier * kvm_arch_vcpu_runnable - determine if the vcpu can be scheduled
5529ed24f4bSMarc Zyngier * @v: The VCPU pointer
5539ed24f4bSMarc Zyngier *
5549ed24f4bSMarc Zyngier * If the guest CPU is not waiting for interrupts or an interrupt line is
5559ed24f4bSMarc Zyngier * asserted, the CPU is by definition runnable.
5569ed24f4bSMarc Zyngier */
kvm_arch_vcpu_runnable(struct kvm_vcpu * v)5579ed24f4bSMarc Zyngier int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
5589ed24f4bSMarc Zyngier {
5599ed24f4bSMarc Zyngier bool irq_lines = *vcpu_hcr(v) & (HCR_VI | HCR_VF);
5609ed24f4bSMarc Zyngier return ((irq_lines || kvm_vgic_vcpu_pending_irq(v))
561b171f9bbSOliver Upton && !kvm_arm_vcpu_stopped(v) && !v->arch.pause);
5629ed24f4bSMarc Zyngier }
5639ed24f4bSMarc Zyngier
kvm_arch_vcpu_in_kernel(struct kvm_vcpu * vcpu)5649ed24f4bSMarc Zyngier bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
5659ed24f4bSMarc Zyngier {
5669ed24f4bSMarc Zyngier return vcpu_mode_priv(vcpu);
5679ed24f4bSMarc Zyngier }
5689ed24f4bSMarc Zyngier
5698e5b0adeSLinus Torvalds #ifdef CONFIG_GUEST_PERF_EVENTS
kvm_arch_vcpu_get_ip(struct kvm_vcpu * vcpu)570e1bfc245SSean Christopherson unsigned long kvm_arch_vcpu_get_ip(struct kvm_vcpu *vcpu)
571e1bfc245SSean Christopherson {
572e1bfc245SSean Christopherson return *vcpu_pc(vcpu);
573e1bfc245SSean Christopherson }
5748e5b0adeSLinus Torvalds #endif
575e1bfc245SSean Christopherson
kvm_vcpu_initialized(struct kvm_vcpu * vcpu)576b5aa368aSMarc Zyngier static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu)
577052f064dSMarc Zyngier {
578ef984060SOliver Upton return vcpu_get_flag(vcpu, VCPU_INITIALIZED);
579052f064dSMarc Zyngier }
580052f064dSMarc Zyngier
581b5aa368aSMarc Zyngier /*
582b5aa368aSMarc Zyngier * Handle both the initialisation that is being done when the vcpu is
583b5aa368aSMarc Zyngier * run for the first time, as well as the updates that must be
584b5aa368aSMarc Zyngier * performed each time we get a new thread dealing with this vcpu.
585b5aa368aSMarc Zyngier */
kvm_arch_vcpu_run_pid_change(struct kvm_vcpu * vcpu)586b5aa368aSMarc Zyngier int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu)
5879ed24f4bSMarc Zyngier {
5889ed24f4bSMarc Zyngier struct kvm *kvm = vcpu->kvm;
589b5aa368aSMarc Zyngier int ret;
5909ed24f4bSMarc Zyngier
591b5aa368aSMarc Zyngier if (!kvm_vcpu_initialized(vcpu))
592b5aa368aSMarc Zyngier return -ENOEXEC;
5939ed24f4bSMarc Zyngier
5949ed24f4bSMarc Zyngier if (!kvm_arm_vcpu_is_finalized(vcpu))
5959ed24f4bSMarc Zyngier return -EPERM;
5969ed24f4bSMarc Zyngier
597b5aa368aSMarc Zyngier ret = kvm_arch_vcpu_run_map_fp(vcpu);
598b5aa368aSMarc Zyngier if (ret)
599b5aa368aSMarc Zyngier return ret;
600b5aa368aSMarc Zyngier
601cc5705fbSMarc Zyngier if (likely(vcpu_has_run_once(vcpu)))
602b5aa368aSMarc Zyngier return 0;
6039ed24f4bSMarc Zyngier
604263d6287SAlexandru Elisei kvm_arm_vcpu_init_debug(vcpu);
605263d6287SAlexandru Elisei
6069ed24f4bSMarc Zyngier if (likely(irqchip_in_kernel(kvm))) {
6079ed24f4bSMarc Zyngier /*
6089ed24f4bSMarc Zyngier * Map the VGIC hardware resources before running a vcpu the
6099ed24f4bSMarc Zyngier * first time on this VM.
6109ed24f4bSMarc Zyngier */
6119ed24f4bSMarc Zyngier ret = kvm_vgic_map_resources(kvm);
6129ed24f4bSMarc Zyngier if (ret)
6139ed24f4bSMarc Zyngier return ret;
6149ed24f4bSMarc Zyngier }
6159ed24f4bSMarc Zyngier
6169ed24f4bSMarc Zyngier ret = kvm_timer_enable(vcpu);
6179ed24f4bSMarc Zyngier if (ret)
6189ed24f4bSMarc Zyngier return ret;
6199ed24f4bSMarc Zyngier
6209ed24f4bSMarc Zyngier ret = kvm_arm_pmu_v3_enable(vcpu);
6211408e73dSMarc Zyngier if (ret)
6221408e73dSMarc Zyngier return ret;
6231408e73dSMarc Zyngier
6249d0c063aSFuad Tabba if (is_protected_kvm_enabled()) {
6259d0c063aSFuad Tabba ret = pkvm_create_hyp_vm(kvm);
6269d0c063aSFuad Tabba if (ret)
6279d0c063aSFuad Tabba return ret;
6289d0c063aSFuad Tabba }
6299d0c063aSFuad Tabba
6301408e73dSMarc Zyngier if (!irqchip_in_kernel(kvm)) {
6311408e73dSMarc Zyngier /*
6321408e73dSMarc Zyngier * Tell the rest of the code that there are userspace irqchip
6331408e73dSMarc Zyngier * VMs in the wild.
6341408e73dSMarc Zyngier */
6351408e73dSMarc Zyngier static_branch_inc(&userspace_irqchip_in_use);
6361408e73dSMarc Zyngier }
6379ed24f4bSMarc Zyngier
6382a0c3433SFuad Tabba /*
6392a0c3433SFuad Tabba * Initialize traps for protected VMs.
6402a0c3433SFuad Tabba * NOTE: Move to run in EL2 directly, rather than via a hypercall, once
6412a0c3433SFuad Tabba * the code is in place for first run initialization at EL2.
6422a0c3433SFuad Tabba */
6432a0c3433SFuad Tabba if (kvm_vm_is_protected(kvm))
6442a0c3433SFuad Tabba kvm_call_hyp_nvhe(__pkvm_vcpu_init_traps, vcpu);
6452a0c3433SFuad Tabba
6464bba7f7dSOliver Upton mutex_lock(&kvm->arch.config_lock);
64706394531SMarc Zyngier set_bit(KVM_ARCH_FLAG_HAS_RAN_ONCE, &kvm->arch.flags);
6484bba7f7dSOliver Upton mutex_unlock(&kvm->arch.config_lock);
6495177fe91SMarc Zyngier
6509ed24f4bSMarc Zyngier return ret;
6519ed24f4bSMarc Zyngier }
6529ed24f4bSMarc Zyngier
kvm_arch_intc_initialized(struct kvm * kvm)6539ed24f4bSMarc Zyngier bool kvm_arch_intc_initialized(struct kvm *kvm)
6549ed24f4bSMarc Zyngier {
6559ed24f4bSMarc Zyngier return vgic_initialized(kvm);
6569ed24f4bSMarc Zyngier }
6579ed24f4bSMarc Zyngier
kvm_arm_halt_guest(struct kvm * kvm)6589ed24f4bSMarc Zyngier void kvm_arm_halt_guest(struct kvm *kvm)
6599ed24f4bSMarc Zyngier {
66046808a4cSMarc Zyngier unsigned long i;
6619ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu;
6629ed24f4bSMarc Zyngier
6639ed24f4bSMarc Zyngier kvm_for_each_vcpu(i, vcpu, kvm)
6649ed24f4bSMarc Zyngier vcpu->arch.pause = true;
6659ed24f4bSMarc Zyngier kvm_make_all_cpus_request(kvm, KVM_REQ_SLEEP);
6669ed24f4bSMarc Zyngier }
6679ed24f4bSMarc Zyngier
kvm_arm_resume_guest(struct kvm * kvm)6689ed24f4bSMarc Zyngier void kvm_arm_resume_guest(struct kvm *kvm)
6699ed24f4bSMarc Zyngier {
67046808a4cSMarc Zyngier unsigned long i;
6719ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu;
6729ed24f4bSMarc Zyngier
6739ed24f4bSMarc Zyngier kvm_for_each_vcpu(i, vcpu, kvm) {
6749ed24f4bSMarc Zyngier vcpu->arch.pause = false;
675d92a5d1cSSean Christopherson __kvm_vcpu_wake_up(vcpu);
6769ed24f4bSMarc Zyngier }
6779ed24f4bSMarc Zyngier }
6789ed24f4bSMarc Zyngier
kvm_vcpu_sleep(struct kvm_vcpu * vcpu)6791c6219e3SOliver Upton static void kvm_vcpu_sleep(struct kvm_vcpu *vcpu)
6809ed24f4bSMarc Zyngier {
68138060944SPaolo Bonzini struct rcuwait *wait = kvm_arch_vcpu_get_wait(vcpu);
6829ed24f4bSMarc Zyngier
68338060944SPaolo Bonzini rcuwait_wait_event(wait,
684b171f9bbSOliver Upton (!kvm_arm_vcpu_stopped(vcpu)) && (!vcpu->arch.pause),
68538060944SPaolo Bonzini TASK_INTERRUPTIBLE);
6869ed24f4bSMarc Zyngier
687b171f9bbSOliver Upton if (kvm_arm_vcpu_stopped(vcpu) || vcpu->arch.pause) {
6889ed24f4bSMarc Zyngier /* Awaken to handle a signal, request we sleep again later. */
6899ed24f4bSMarc Zyngier kvm_make_request(KVM_REQ_SLEEP, vcpu);
6909ed24f4bSMarc Zyngier }
6919ed24f4bSMarc Zyngier
6929ed24f4bSMarc Zyngier /*
6939ed24f4bSMarc Zyngier * Make sure we will observe a potential reset request if we've
6949ed24f4bSMarc Zyngier * observed a change to the power state. Pairs with the smp_wmb() in
6959ed24f4bSMarc Zyngier * kvm_psci_vcpu_on().
6969ed24f4bSMarc Zyngier */
6979ed24f4bSMarc Zyngier smp_rmb();
6989ed24f4bSMarc Zyngier }
6999ed24f4bSMarc Zyngier
7006109c5a6SSean Christopherson /**
7016109c5a6SSean Christopherson * kvm_vcpu_wfi - emulate Wait-For-Interrupt behavior
7026109c5a6SSean Christopherson * @vcpu: The VCPU pointer
7036109c5a6SSean Christopherson *
7046109c5a6SSean Christopherson * Suspend execution of a vCPU until a valid wake event is detected, i.e. until
7056109c5a6SSean Christopherson * the vCPU is runnable. The vCPU may or may not be scheduled out, depending
7066109c5a6SSean Christopherson * on when a wake event arrives, e.g. there may already be a pending wake event.
7076109c5a6SSean Christopherson */
kvm_vcpu_wfi(struct kvm_vcpu * vcpu)7086109c5a6SSean Christopherson void kvm_vcpu_wfi(struct kvm_vcpu *vcpu)
7096109c5a6SSean Christopherson {
7106109c5a6SSean Christopherson /*
7116109c5a6SSean Christopherson * Sync back the state of the GIC CPU interface so that we have
7126109c5a6SSean Christopherson * the latest PMR and group enables. This ensures that
7136109c5a6SSean Christopherson * kvm_arch_vcpu_runnable has up-to-date data to decide whether
7146109c5a6SSean Christopherson * we have pending interrupts, e.g. when determining if the
7156109c5a6SSean Christopherson * vCPU should block.
7166109c5a6SSean Christopherson *
7176109c5a6SSean Christopherson * For the same reason, we want to tell GICv4 that we need
7186109c5a6SSean Christopherson * doorbells to be signalled, should an interrupt become pending.
7196109c5a6SSean Christopherson */
7206109c5a6SSean Christopherson preempt_disable();
7216109c5a6SSean Christopherson kvm_vgic_vmcr_sync(vcpu);
722b321c31cSMarc Zyngier vcpu_set_flag(vcpu, IN_WFI);
723b321c31cSMarc Zyngier vgic_v4_put(vcpu);
7246109c5a6SSean Christopherson preempt_enable();
7256109c5a6SSean Christopherson
72691b99ea7SSean Christopherson kvm_vcpu_halt(vcpu);
727eebc538dSMarc Zyngier vcpu_clear_flag(vcpu, IN_WFIT);
7286109c5a6SSean Christopherson
7296109c5a6SSean Christopherson preempt_disable();
730b321c31cSMarc Zyngier vcpu_clear_flag(vcpu, IN_WFI);
7316109c5a6SSean Christopherson vgic_v4_load(vcpu);
7326109c5a6SSean Christopherson preempt_enable();
7336109c5a6SSean Christopherson }
7346109c5a6SSean Christopherson
kvm_vcpu_suspend(struct kvm_vcpu * vcpu)7357b33a09dSOliver Upton static int kvm_vcpu_suspend(struct kvm_vcpu *vcpu)
7367b33a09dSOliver Upton {
7377b33a09dSOliver Upton if (!kvm_arm_vcpu_suspended(vcpu))
7387b33a09dSOliver Upton return 1;
7397b33a09dSOliver Upton
7407b33a09dSOliver Upton kvm_vcpu_wfi(vcpu);
7417b33a09dSOliver Upton
7427b33a09dSOliver Upton /*
7437b33a09dSOliver Upton * The suspend state is sticky; we do not leave it until userspace
7447b33a09dSOliver Upton * explicitly marks the vCPU as runnable. Request that we suspend again
7457b33a09dSOliver Upton * later.
7467b33a09dSOliver Upton */
7477b33a09dSOliver Upton kvm_make_request(KVM_REQ_SUSPEND, vcpu);
7487b33a09dSOliver Upton
7497b33a09dSOliver Upton /*
7507b33a09dSOliver Upton * Check to make sure the vCPU is actually runnable. If so, exit to
7517b33a09dSOliver Upton * userspace informing it of the wakeup condition.
7527b33a09dSOliver Upton */
7537b33a09dSOliver Upton if (kvm_arch_vcpu_runnable(vcpu)) {
7547b33a09dSOliver Upton memset(&vcpu->run->system_event, 0, sizeof(vcpu->run->system_event));
7557b33a09dSOliver Upton vcpu->run->system_event.type = KVM_SYSTEM_EVENT_WAKEUP;
7567b33a09dSOliver Upton vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT;
7577b33a09dSOliver Upton return 0;
7587b33a09dSOliver Upton }
7597b33a09dSOliver Upton
7607b33a09dSOliver Upton /*
7617b33a09dSOliver Upton * Otherwise, we were unblocked to process a different event, such as a
7627b33a09dSOliver Upton * pending signal. Return 1 and allow kvm_arch_vcpu_ioctl_run() to
7637b33a09dSOliver Upton * process the event.
7647b33a09dSOliver Upton */
7657b33a09dSOliver Upton return 1;
7667b33a09dSOliver Upton }
7677b33a09dSOliver Upton
7683fdd0459SOliver Upton /**
7693fdd0459SOliver Upton * check_vcpu_requests - check and handle pending vCPU requests
7703fdd0459SOliver Upton * @vcpu: the VCPU pointer
7713fdd0459SOliver Upton *
7723fdd0459SOliver Upton * Return: 1 if we should enter the guest
7733fdd0459SOliver Upton * 0 if we should exit to userspace
7743fdd0459SOliver Upton * < 0 if we should exit to userspace, where the return value indicates
7753fdd0459SOliver Upton * an error
7763fdd0459SOliver Upton */
check_vcpu_requests(struct kvm_vcpu * vcpu)7773fdd0459SOliver Upton static int check_vcpu_requests(struct kvm_vcpu *vcpu)
7789ed24f4bSMarc Zyngier {
7799ed24f4bSMarc Zyngier if (kvm_request_pending(vcpu)) {
7809ed24f4bSMarc Zyngier if (kvm_check_request(KVM_REQ_SLEEP, vcpu))
7811c6219e3SOliver Upton kvm_vcpu_sleep(vcpu);
7829ed24f4bSMarc Zyngier
7839ed24f4bSMarc Zyngier if (kvm_check_request(KVM_REQ_VCPU_RESET, vcpu))
7849ed24f4bSMarc Zyngier kvm_reset_vcpu(vcpu);
7859ed24f4bSMarc Zyngier
7869ed24f4bSMarc Zyngier /*
7879ed24f4bSMarc Zyngier * Clear IRQ_PENDING requests that were made to guarantee
7889ed24f4bSMarc Zyngier * that a VCPU sees new virtual interrupts.
7899ed24f4bSMarc Zyngier */
7909ed24f4bSMarc Zyngier kvm_check_request(KVM_REQ_IRQ_PENDING, vcpu);
7919ed24f4bSMarc Zyngier
7929ed24f4bSMarc Zyngier if (kvm_check_request(KVM_REQ_RECORD_STEAL, vcpu))
7939ed24f4bSMarc Zyngier kvm_update_stolen_time(vcpu);
7949ed24f4bSMarc Zyngier
7959ed24f4bSMarc Zyngier if (kvm_check_request(KVM_REQ_RELOAD_GICv4, vcpu)) {
7969ed24f4bSMarc Zyngier /* The distributor enable bits were changed */
7979ed24f4bSMarc Zyngier preempt_disable();
798b321c31cSMarc Zyngier vgic_v4_put(vcpu);
7999ed24f4bSMarc Zyngier vgic_v4_load(vcpu);
8009ed24f4bSMarc Zyngier preempt_enable();
8019ed24f4bSMarc Zyngier }
802d0c94c49SMarc Zyngier
803d0c94c49SMarc Zyngier if (kvm_check_request(KVM_REQ_RELOAD_PMU, vcpu))
804d0c94c49SMarc Zyngier kvm_pmu_handle_pmcr(vcpu,
805d0c94c49SMarc Zyngier __vcpu_sys_reg(vcpu, PMCR_EL0));
8067b33a09dSOliver Upton
807b1f778a2SMarc Zyngier if (kvm_check_request(KVM_REQ_RESYNC_PMU_EL0, vcpu))
808b1f778a2SMarc Zyngier kvm_vcpu_pmu_restore_guest(vcpu);
809b1f778a2SMarc Zyngier
8107b33a09dSOliver Upton if (kvm_check_request(KVM_REQ_SUSPEND, vcpu))
8117b33a09dSOliver Upton return kvm_vcpu_suspend(vcpu);
8129cb1096fSGavin Shan
8139cb1096fSGavin Shan if (kvm_dirty_ring_check_request(vcpu))
8149cb1096fSGavin Shan return 0;
8159ed24f4bSMarc Zyngier }
8163fdd0459SOliver Upton
8173fdd0459SOliver Upton return 1;
8189ed24f4bSMarc Zyngier }
8199ed24f4bSMarc Zyngier
vcpu_mode_is_bad_32bit(struct kvm_vcpu * vcpu)8202f6a49bbSWill Deacon static bool vcpu_mode_is_bad_32bit(struct kvm_vcpu *vcpu)
8212f6a49bbSWill Deacon {
8222f6a49bbSWill Deacon if (likely(!vcpu_mode_is_32bit(vcpu)))
8232f6a49bbSWill Deacon return false;
8242f6a49bbSWill Deacon
825a77b31dcSMarc Zyngier if (vcpu_has_nv(vcpu))
826a77b31dcSMarc Zyngier return true;
827a77b31dcSMarc Zyngier
828f3c6efc7SOliver Upton return !kvm_supports_32bit_el0();
8292f6a49bbSWill Deacon }
8302f6a49bbSWill Deacon
8319ed24f4bSMarc Zyngier /**
8326caa5812SOliver Upton * kvm_vcpu_exit_request - returns true if the VCPU should *not* enter the guest
8336caa5812SOliver Upton * @vcpu: The VCPU pointer
8346caa5812SOliver Upton * @ret: Pointer to write optional return code
8356caa5812SOliver Upton *
8366caa5812SOliver Upton * Returns: true if the VCPU needs to return to a preemptible + interruptible
8376caa5812SOliver Upton * and skip guest entry.
8386caa5812SOliver Upton *
8396caa5812SOliver Upton * This function disambiguates between two different types of exits: exits to a
8406caa5812SOliver Upton * preemptible + interruptible kernel context and exits to userspace. For an
8416caa5812SOliver Upton * exit to userspace, this function will write the return code to ret and return
8426caa5812SOliver Upton * true. For an exit to preemptible + interruptible kernel context (i.e. check
8436caa5812SOliver Upton * for pending work and re-enter), return true without writing to ret.
8446caa5812SOliver Upton */
kvm_vcpu_exit_request(struct kvm_vcpu * vcpu,int * ret)8456caa5812SOliver Upton static bool kvm_vcpu_exit_request(struct kvm_vcpu *vcpu, int *ret)
8466caa5812SOliver Upton {
8476caa5812SOliver Upton struct kvm_run *run = vcpu->run;
8486caa5812SOliver Upton
8496caa5812SOliver Upton /*
8506caa5812SOliver Upton * If we're using a userspace irqchip, then check if we need
8516caa5812SOliver Upton * to tell a userspace irqchip about timer or PMU level
8526caa5812SOliver Upton * changes and if so, exit to userspace (the actual level
8536caa5812SOliver Upton * state gets updated in kvm_timer_update_run and
8546caa5812SOliver Upton * kvm_pmu_update_run below).
8556caa5812SOliver Upton */
8566caa5812SOliver Upton if (static_branch_unlikely(&userspace_irqchip_in_use)) {
8576caa5812SOliver Upton if (kvm_timer_should_notify_user(vcpu) ||
8586caa5812SOliver Upton kvm_pmu_should_notify_user(vcpu)) {
8596caa5812SOliver Upton *ret = -EINTR;
8606caa5812SOliver Upton run->exit_reason = KVM_EXIT_INTR;
8616caa5812SOliver Upton return true;
8626caa5812SOliver Upton }
8636caa5812SOliver Upton }
8646caa5812SOliver Upton
865583cda1bSAlexandru Elisei if (unlikely(vcpu_on_unsupported_cpu(vcpu))) {
866583cda1bSAlexandru Elisei run->exit_reason = KVM_EXIT_FAIL_ENTRY;
867583cda1bSAlexandru Elisei run->fail_entry.hardware_entry_failure_reason = KVM_EXIT_FAIL_ENTRY_CPU_UNSUPPORTED;
868583cda1bSAlexandru Elisei run->fail_entry.cpu = smp_processor_id();
869583cda1bSAlexandru Elisei *ret = 0;
870583cda1bSAlexandru Elisei return true;
871583cda1bSAlexandru Elisei }
872583cda1bSAlexandru Elisei
8736caa5812SOliver Upton return kvm_request_pending(vcpu) ||
8746caa5812SOliver Upton xfer_to_guest_mode_work_pending();
8756caa5812SOliver Upton }
8766caa5812SOliver Upton
8778cfe148aSMark Rutland /*
8788cfe148aSMark Rutland * Actually run the vCPU, entering an RCU extended quiescent state (EQS) while
8798cfe148aSMark Rutland * the vCPU is running.
8808cfe148aSMark Rutland *
8818cfe148aSMark Rutland * This must be noinstr as instrumentation may make use of RCU, and this is not
8828cfe148aSMark Rutland * safe during the EQS.
8838cfe148aSMark Rutland */
kvm_arm_vcpu_enter_exit(struct kvm_vcpu * vcpu)8848cfe148aSMark Rutland static int noinstr kvm_arm_vcpu_enter_exit(struct kvm_vcpu *vcpu)
8858cfe148aSMark Rutland {
8868cfe148aSMark Rutland int ret;
8878cfe148aSMark Rutland
8888cfe148aSMark Rutland guest_state_enter_irqoff();
8898cfe148aSMark Rutland ret = kvm_call_hyp_ret(__kvm_vcpu_run, vcpu);
8908cfe148aSMark Rutland guest_state_exit_irqoff();
8918cfe148aSMark Rutland
8928cfe148aSMark Rutland return ret;
8938cfe148aSMark Rutland }
8948cfe148aSMark Rutland
8956caa5812SOliver Upton /**
8969ed24f4bSMarc Zyngier * kvm_arch_vcpu_ioctl_run - the main VCPU run function to execute guest code
8979ed24f4bSMarc Zyngier * @vcpu: The VCPU pointer
8989ed24f4bSMarc Zyngier *
8999ed24f4bSMarc Zyngier * This function is called through the VCPU_RUN ioctl called from user space. It
9009ed24f4bSMarc Zyngier * will execute VM code in a loop until the time slice for the process is used
9019ed24f4bSMarc Zyngier * or some emulation is needed from user space in which case the function will
9029ed24f4bSMarc Zyngier * return with return value 0 and with the kvm_run structure filled in with the
9039ed24f4bSMarc Zyngier * required data for the requested emulation.
9049ed24f4bSMarc Zyngier */
kvm_arch_vcpu_ioctl_run(struct kvm_vcpu * vcpu)90538060944SPaolo Bonzini int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
9069ed24f4bSMarc Zyngier {
90738060944SPaolo Bonzini struct kvm_run *run = vcpu->run;
9089ed24f4bSMarc Zyngier int ret;
9099ed24f4bSMarc Zyngier
9109ed24f4bSMarc Zyngier if (run->exit_reason == KVM_EXIT_MMIO) {
91174cc7e0cSTianjia Zhang ret = kvm_handle_mmio_return(vcpu);
9129ed24f4bSMarc Zyngier if (ret)
9139ed24f4bSMarc Zyngier return ret;
9149ed24f4bSMarc Zyngier }
9159ed24f4bSMarc Zyngier
9169ed24f4bSMarc Zyngier vcpu_load(vcpu);
9179ed24f4bSMarc Zyngier
918e3e880bbSZenghui Yu if (run->immediate_exit) {
919e3e880bbSZenghui Yu ret = -EINTR;
920e3e880bbSZenghui Yu goto out;
921e3e880bbSZenghui Yu }
922e3e880bbSZenghui Yu
9239ed24f4bSMarc Zyngier kvm_sigset_activate(vcpu);
9249ed24f4bSMarc Zyngier
9259ed24f4bSMarc Zyngier ret = 1;
9269ed24f4bSMarc Zyngier run->exit_reason = KVM_EXIT_UNKNOWN;
92718f3976fSAlexandru Elisei run->flags = 0;
9289ed24f4bSMarc Zyngier while (ret > 0) {
9299ed24f4bSMarc Zyngier /*
9309ed24f4bSMarc Zyngier * Check conditions before entering the guest
9319ed24f4bSMarc Zyngier */
9326caa5812SOliver Upton ret = xfer_to_guest_mode_handle_work(vcpu);
9336caa5812SOliver Upton if (!ret)
9346caa5812SOliver Upton ret = 1;
9359ed24f4bSMarc Zyngier
9363fdd0459SOliver Upton if (ret > 0)
9373fdd0459SOliver Upton ret = check_vcpu_requests(vcpu);
9389ed24f4bSMarc Zyngier
9399ed24f4bSMarc Zyngier /*
9409ed24f4bSMarc Zyngier * Preparing the interrupts to be injected also
9419ed24f4bSMarc Zyngier * involves poking the GIC, which must be done in a
9429ed24f4bSMarc Zyngier * non-preemptible context.
9439ed24f4bSMarc Zyngier */
9449ed24f4bSMarc Zyngier preempt_disable();
9459ed24f4bSMarc Zyngier
9463248136bSJulien Grall /*
9473248136bSJulien Grall * The VMID allocator only tracks active VMIDs per
9483248136bSJulien Grall * physical CPU, and therefore the VMID allocated may not be
9493248136bSJulien Grall * preserved on VMID roll-over if the task was preempted,
9503248136bSJulien Grall * making a thread's VMID inactive. So we need to call
9513248136bSJulien Grall * kvm_arm_vmid_update() in non-premptible context.
9523248136bSJulien Grall */
9533248136bSJulien Grall kvm_arm_vmid_update(&vcpu->arch.hw_mmu->vmid);
9543248136bSJulien Grall
9559ed24f4bSMarc Zyngier kvm_pmu_flush_hwstate(vcpu);
9569ed24f4bSMarc Zyngier
9579ed24f4bSMarc Zyngier local_irq_disable();
9589ed24f4bSMarc Zyngier
9599ed24f4bSMarc Zyngier kvm_vgic_flush_hwstate(vcpu);
9609ed24f4bSMarc Zyngier
96184d751a0SFuad Tabba kvm_pmu_update_vcpu_events(vcpu);
96284d751a0SFuad Tabba
9639ed24f4bSMarc Zyngier /*
9649ed24f4bSMarc Zyngier * Ensure we set mode to IN_GUEST_MODE after we disable
9659ed24f4bSMarc Zyngier * interrupts and before the final VCPU requests check.
9669ed24f4bSMarc Zyngier * See the comment in kvm_vcpu_exiting_guest_mode() and
9679ed24f4bSMarc Zyngier * Documentation/virt/kvm/vcpu-requests.rst
9689ed24f4bSMarc Zyngier */
9699ed24f4bSMarc Zyngier smp_store_mb(vcpu->mode, IN_GUEST_MODE);
9709ed24f4bSMarc Zyngier
9716caa5812SOliver Upton if (ret <= 0 || kvm_vcpu_exit_request(vcpu, &ret)) {
9729ed24f4bSMarc Zyngier vcpu->mode = OUTSIDE_GUEST_MODE;
9739ed24f4bSMarc Zyngier isb(); /* Ensure work in x_flush_hwstate is committed */
9749ed24f4bSMarc Zyngier kvm_pmu_sync_hwstate(vcpu);
9759ed24f4bSMarc Zyngier if (static_branch_unlikely(&userspace_irqchip_in_use))
9763c5ff0c6SMarc Zyngier kvm_timer_sync_user(vcpu);
9779ed24f4bSMarc Zyngier kvm_vgic_sync_hwstate(vcpu);
9789ed24f4bSMarc Zyngier local_irq_enable();
9799ed24f4bSMarc Zyngier preempt_enable();
9809ed24f4bSMarc Zyngier continue;
9819ed24f4bSMarc Zyngier }
9829ed24f4bSMarc Zyngier
9839ed24f4bSMarc Zyngier kvm_arm_setup_debug(vcpu);
984af9a0e21SMarc Zyngier kvm_arch_vcpu_ctxflush_fp(vcpu);
9859ed24f4bSMarc Zyngier
9869ed24f4bSMarc Zyngier /**************************************************************
9879ed24f4bSMarc Zyngier * Enter the guest
9889ed24f4bSMarc Zyngier */
9899ed24f4bSMarc Zyngier trace_kvm_entry(*vcpu_pc(vcpu));
9908cfe148aSMark Rutland guest_timing_enter_irqoff();
9919ed24f4bSMarc Zyngier
9928cfe148aSMark Rutland ret = kvm_arm_vcpu_enter_exit(vcpu);
9939ed24f4bSMarc Zyngier
9949ed24f4bSMarc Zyngier vcpu->mode = OUTSIDE_GUEST_MODE;
9959ed24f4bSMarc Zyngier vcpu->stat.exits++;
9969ed24f4bSMarc Zyngier /*
9979ed24f4bSMarc Zyngier * Back from guest
9989ed24f4bSMarc Zyngier *************************************************************/
9999ed24f4bSMarc Zyngier
10009ed24f4bSMarc Zyngier kvm_arm_clear_debug(vcpu);
10019ed24f4bSMarc Zyngier
10029ed24f4bSMarc Zyngier /*
10039ed24f4bSMarc Zyngier * We must sync the PMU state before the vgic state so
10049ed24f4bSMarc Zyngier * that the vgic can properly sample the updated state of the
10059ed24f4bSMarc Zyngier * interrupt line.
10069ed24f4bSMarc Zyngier */
10079ed24f4bSMarc Zyngier kvm_pmu_sync_hwstate(vcpu);
10089ed24f4bSMarc Zyngier
10099ed24f4bSMarc Zyngier /*
10109ed24f4bSMarc Zyngier * Sync the vgic state before syncing the timer state because
10119ed24f4bSMarc Zyngier * the timer code needs to know if the virtual timer
10129ed24f4bSMarc Zyngier * interrupts are active.
10139ed24f4bSMarc Zyngier */
10149ed24f4bSMarc Zyngier kvm_vgic_sync_hwstate(vcpu);
10159ed24f4bSMarc Zyngier
10169ed24f4bSMarc Zyngier /*
10179ed24f4bSMarc Zyngier * Sync the timer hardware state before enabling interrupts as
10189ed24f4bSMarc Zyngier * we don't want vtimer interrupts to race with syncing the
10199ed24f4bSMarc Zyngier * timer virtual interrupt state.
10209ed24f4bSMarc Zyngier */
10219ed24f4bSMarc Zyngier if (static_branch_unlikely(&userspace_irqchip_in_use))
10223c5ff0c6SMarc Zyngier kvm_timer_sync_user(vcpu);
10239ed24f4bSMarc Zyngier
10249ed24f4bSMarc Zyngier kvm_arch_vcpu_ctxsync_fp(vcpu);
10259ed24f4bSMarc Zyngier
10269ed24f4bSMarc Zyngier /*
10278cfe148aSMark Rutland * We must ensure that any pending interrupts are taken before
10288cfe148aSMark Rutland * we exit guest timing so that timer ticks are accounted as
10298cfe148aSMark Rutland * guest time. Transiently unmask interrupts so that any
10308cfe148aSMark Rutland * pending interrupts are taken.
10319ed24f4bSMarc Zyngier *
10328cfe148aSMark Rutland * Per ARM DDI 0487G.b section D1.13.4, an ISB (or other
10338cfe148aSMark Rutland * context synchronization event) is necessary to ensure that
10348cfe148aSMark Rutland * pending interrupts are taken.
10359ed24f4bSMarc Zyngier */
1036f7659f8bSMarc Zyngier if (ARM_EXCEPTION_CODE(ret) == ARM_EXCEPTION_IRQ) {
10379ed24f4bSMarc Zyngier local_irq_enable();
10388cfe148aSMark Rutland isb();
10398cfe148aSMark Rutland local_irq_disable();
1040f7659f8bSMarc Zyngier }
10419ed24f4bSMarc Zyngier
10428cfe148aSMark Rutland guest_timing_exit_irqoff();
10438cfe148aSMark Rutland
10448cfe148aSMark Rutland local_irq_enable();
10458cfe148aSMark Rutland
10469ed24f4bSMarc Zyngier trace_kvm_exit(ret, kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu));
10479ed24f4bSMarc Zyngier
10489ed24f4bSMarc Zyngier /* Exit types that need handling before we can be preempted */
104974cc7e0cSTianjia Zhang handle_exit_early(vcpu, ret);
10509ed24f4bSMarc Zyngier
10519ed24f4bSMarc Zyngier preempt_enable();
10529ed24f4bSMarc Zyngier
105322f55384SQais Yousef /*
105422f55384SQais Yousef * The ARMv8 architecture doesn't give the hypervisor
105522f55384SQais Yousef * a mechanism to prevent a guest from dropping to AArch32 EL0
105622f55384SQais Yousef * if implemented by the CPU. If we spot the guest in such
105722f55384SQais Yousef * state and that we decided it wasn't supposed to do so (like
105822f55384SQais Yousef * with the asymmetric AArch32 case), return to userspace with
105922f55384SQais Yousef * a fatal error.
106022f55384SQais Yousef */
10612f6a49bbSWill Deacon if (vcpu_mode_is_bad_32bit(vcpu)) {
106222f55384SQais Yousef /*
106322f55384SQais Yousef * As we have caught the guest red-handed, decide that
106422f55384SQais Yousef * it isn't fit for purpose anymore by making the vcpu
106522f55384SQais Yousef * invalid. The VMM can try and fix it by issuing a
106622f55384SQais Yousef * KVM_ARM_VCPU_INIT if it really wants to.
106722f55384SQais Yousef */
1068ef984060SOliver Upton vcpu_clear_flag(vcpu, VCPU_INITIALIZED);
106922f55384SQais Yousef ret = ARM_EXCEPTION_IL;
107022f55384SQais Yousef }
107122f55384SQais Yousef
107274cc7e0cSTianjia Zhang ret = handle_exit(vcpu, ret);
10739ed24f4bSMarc Zyngier }
10749ed24f4bSMarc Zyngier
10759ed24f4bSMarc Zyngier /* Tell userspace about in-kernel device output levels */
10769ed24f4bSMarc Zyngier if (unlikely(!irqchip_in_kernel(vcpu->kvm))) {
10779ed24f4bSMarc Zyngier kvm_timer_update_run(vcpu);
10789ed24f4bSMarc Zyngier kvm_pmu_update_run(vcpu);
10799ed24f4bSMarc Zyngier }
10809ed24f4bSMarc Zyngier
10819ed24f4bSMarc Zyngier kvm_sigset_deactivate(vcpu);
10829ed24f4bSMarc Zyngier
1083e3e880bbSZenghui Yu out:
108426778aaaSMarc Zyngier /*
108526778aaaSMarc Zyngier * In the unlikely event that we are returning to userspace
108626778aaaSMarc Zyngier * with pending exceptions or PC adjustment, commit these
108726778aaaSMarc Zyngier * adjustments in order to give userspace a consistent view of
108826778aaaSMarc Zyngier * the vcpu state. Note that this relies on __kvm_adjust_pc()
108926778aaaSMarc Zyngier * being preempt-safe on VHE.
109026778aaaSMarc Zyngier */
1091699bb2e0SMarc Zyngier if (unlikely(vcpu_get_flag(vcpu, PENDING_EXCEPTION) ||
1092699bb2e0SMarc Zyngier vcpu_get_flag(vcpu, INCREMENT_PC)))
109326778aaaSMarc Zyngier kvm_call_hyp(__kvm_adjust_pc, vcpu);
109426778aaaSMarc Zyngier
10959ed24f4bSMarc Zyngier vcpu_put(vcpu);
10969ed24f4bSMarc Zyngier return ret;
10979ed24f4bSMarc Zyngier }
10989ed24f4bSMarc Zyngier
vcpu_interrupt_line(struct kvm_vcpu * vcpu,int number,bool level)10999ed24f4bSMarc Zyngier static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level)
11009ed24f4bSMarc Zyngier {
11019ed24f4bSMarc Zyngier int bit_index;
11029ed24f4bSMarc Zyngier bool set;
11039ed24f4bSMarc Zyngier unsigned long *hcr;
11049ed24f4bSMarc Zyngier
11059ed24f4bSMarc Zyngier if (number == KVM_ARM_IRQ_CPU_IRQ)
11069ed24f4bSMarc Zyngier bit_index = __ffs(HCR_VI);
11079ed24f4bSMarc Zyngier else /* KVM_ARM_IRQ_CPU_FIQ */
11089ed24f4bSMarc Zyngier bit_index = __ffs(HCR_VF);
11099ed24f4bSMarc Zyngier
11109ed24f4bSMarc Zyngier hcr = vcpu_hcr(vcpu);
11119ed24f4bSMarc Zyngier if (level)
11129ed24f4bSMarc Zyngier set = test_and_set_bit(bit_index, hcr);
11139ed24f4bSMarc Zyngier else
11149ed24f4bSMarc Zyngier set = test_and_clear_bit(bit_index, hcr);
11159ed24f4bSMarc Zyngier
11169ed24f4bSMarc Zyngier /*
11179ed24f4bSMarc Zyngier * If we didn't change anything, no need to wake up or kick other CPUs
11189ed24f4bSMarc Zyngier */
11199ed24f4bSMarc Zyngier if (set == level)
11209ed24f4bSMarc Zyngier return 0;
11219ed24f4bSMarc Zyngier
11229ed24f4bSMarc Zyngier /*
11239ed24f4bSMarc Zyngier * The vcpu irq_lines field was updated, wake up sleeping VCPUs and
11249ed24f4bSMarc Zyngier * trigger a world-switch round on the running physical CPU to set the
11259ed24f4bSMarc Zyngier * virtual IRQ/FIQ fields in the HCR appropriately.
11269ed24f4bSMarc Zyngier */
11279ed24f4bSMarc Zyngier kvm_make_request(KVM_REQ_IRQ_PENDING, vcpu);
11289ed24f4bSMarc Zyngier kvm_vcpu_kick(vcpu);
11299ed24f4bSMarc Zyngier
11309ed24f4bSMarc Zyngier return 0;
11319ed24f4bSMarc Zyngier }
11329ed24f4bSMarc Zyngier
kvm_vm_ioctl_irq_line(struct kvm * kvm,struct kvm_irq_level * irq_level,bool line_status)11339ed24f4bSMarc Zyngier int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
11349ed24f4bSMarc Zyngier bool line_status)
11359ed24f4bSMarc Zyngier {
11369ed24f4bSMarc Zyngier u32 irq = irq_level->irq;
11379ed24f4bSMarc Zyngier unsigned int irq_type, vcpu_idx, irq_num;
11389ed24f4bSMarc Zyngier int nrcpus = atomic_read(&kvm->online_vcpus);
11399ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu = NULL;
11409ed24f4bSMarc Zyngier bool level = irq_level->level;
11419ed24f4bSMarc Zyngier
11429ed24f4bSMarc Zyngier irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK;
11439ed24f4bSMarc Zyngier vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK;
11449ed24f4bSMarc Zyngier vcpu_idx += ((irq >> KVM_ARM_IRQ_VCPU2_SHIFT) & KVM_ARM_IRQ_VCPU2_MASK) * (KVM_ARM_IRQ_VCPU_MASK + 1);
11459ed24f4bSMarc Zyngier irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK;
11469ed24f4bSMarc Zyngier
11479ed24f4bSMarc Zyngier trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level);
11489ed24f4bSMarc Zyngier
11499ed24f4bSMarc Zyngier switch (irq_type) {
11509ed24f4bSMarc Zyngier case KVM_ARM_IRQ_TYPE_CPU:
11519ed24f4bSMarc Zyngier if (irqchip_in_kernel(kvm))
11529ed24f4bSMarc Zyngier return -ENXIO;
11539ed24f4bSMarc Zyngier
11549ed24f4bSMarc Zyngier if (vcpu_idx >= nrcpus)
11559ed24f4bSMarc Zyngier return -EINVAL;
11569ed24f4bSMarc Zyngier
11579ed24f4bSMarc Zyngier vcpu = kvm_get_vcpu(kvm, vcpu_idx);
11589ed24f4bSMarc Zyngier if (!vcpu)
11599ed24f4bSMarc Zyngier return -EINVAL;
11609ed24f4bSMarc Zyngier
11619ed24f4bSMarc Zyngier if (irq_num > KVM_ARM_IRQ_CPU_FIQ)
11629ed24f4bSMarc Zyngier return -EINVAL;
11639ed24f4bSMarc Zyngier
11649ed24f4bSMarc Zyngier return vcpu_interrupt_line(vcpu, irq_num, level);
11659ed24f4bSMarc Zyngier case KVM_ARM_IRQ_TYPE_PPI:
11669ed24f4bSMarc Zyngier if (!irqchip_in_kernel(kvm))
11679ed24f4bSMarc Zyngier return -ENXIO;
11689ed24f4bSMarc Zyngier
11699ed24f4bSMarc Zyngier if (vcpu_idx >= nrcpus)
11709ed24f4bSMarc Zyngier return -EINVAL;
11719ed24f4bSMarc Zyngier
11729ed24f4bSMarc Zyngier vcpu = kvm_get_vcpu(kvm, vcpu_idx);
11739ed24f4bSMarc Zyngier if (!vcpu)
11749ed24f4bSMarc Zyngier return -EINVAL;
11759ed24f4bSMarc Zyngier
11769ed24f4bSMarc Zyngier if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS)
11779ed24f4bSMarc Zyngier return -EINVAL;
11789ed24f4bSMarc Zyngier
11799ed24f4bSMarc Zyngier return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level, NULL);
11809ed24f4bSMarc Zyngier case KVM_ARM_IRQ_TYPE_SPI:
11819ed24f4bSMarc Zyngier if (!irqchip_in_kernel(kvm))
11829ed24f4bSMarc Zyngier return -ENXIO;
11839ed24f4bSMarc Zyngier
11849ed24f4bSMarc Zyngier if (irq_num < VGIC_NR_PRIVATE_IRQS)
11859ed24f4bSMarc Zyngier return -EINVAL;
11869ed24f4bSMarc Zyngier
11879ed24f4bSMarc Zyngier return kvm_vgic_inject_irq(kvm, 0, irq_num, level, NULL);
11889ed24f4bSMarc Zyngier }
11899ed24f4bSMarc Zyngier
11909ed24f4bSMarc Zyngier return -EINVAL;
11919ed24f4bSMarc Zyngier }
11929ed24f4bSMarc Zyngier
kvm_vcpu_init_check_features(struct kvm_vcpu * vcpu,const struct kvm_vcpu_init * init)1193a7a2c72aSOliver Upton static int kvm_vcpu_init_check_features(struct kvm_vcpu *vcpu,
11949ed24f4bSMarc Zyngier const struct kvm_vcpu_init *init)
11959ed24f4bSMarc Zyngier {
1196a7a2c72aSOliver Upton unsigned long features = init->features[0];
1197a7a2c72aSOliver Upton int i;
11989ed24f4bSMarc Zyngier
1199a7a2c72aSOliver Upton if (features & ~KVM_VCPU_VALID_FEATURES)
12009ed24f4bSMarc Zyngier return -ENOENT;
12019ed24f4bSMarc Zyngier
1202a7a2c72aSOliver Upton for (i = 1; i < ARRAY_SIZE(init->features); i++) {
1203a7a2c72aSOliver Upton if (init->features[i])
1204a7a2c72aSOliver Upton return -ENOENT;
12059ed24f4bSMarc Zyngier }
12069ed24f4bSMarc Zyngier
12072251e9ffSOliver Upton if (!test_bit(KVM_ARM_VCPU_EL1_32BIT, &features))
12082251e9ffSOliver Upton return 0;
12092251e9ffSOliver Upton
12102251e9ffSOliver Upton if (!cpus_have_const_cap(ARM64_HAS_32BIT_EL1))
12112251e9ffSOliver Upton return -EINVAL;
12122251e9ffSOliver Upton
12132251e9ffSOliver Upton /* MTE is incompatible with AArch32 */
12142251e9ffSOliver Upton if (kvm_has_mte(vcpu->kvm))
12152251e9ffSOliver Upton return -EINVAL;
12162251e9ffSOliver Upton
12172251e9ffSOliver Upton /* NV is incompatible with AArch32 */
12182251e9ffSOliver Upton if (test_bit(KVM_ARM_VCPU_HAS_EL2, &features))
12192251e9ffSOliver Upton return -EINVAL;
12202251e9ffSOliver Upton
1221a7a2c72aSOliver Upton return 0;
1222a7a2c72aSOliver Upton }
1223a7a2c72aSOliver Upton
kvm_vcpu_init_changed(struct kvm_vcpu * vcpu,const struct kvm_vcpu_init * init)1224a7a2c72aSOliver Upton static bool kvm_vcpu_init_changed(struct kvm_vcpu *vcpu,
1225a7a2c72aSOliver Upton const struct kvm_vcpu_init *init)
1226a7a2c72aSOliver Upton {
1227a7a2c72aSOliver Upton unsigned long features = init->features[0];
1228a7a2c72aSOliver Upton
1229c8a67729SOliver Upton return !bitmap_equal(vcpu->arch.features, &features, KVM_VCPU_MAX_FEATURES);
1230a7a2c72aSOliver Upton }
1231a7a2c72aSOliver Upton
__kvm_vcpu_set_target(struct kvm_vcpu * vcpu,const struct kvm_vcpu_init * init)1232a7a2c72aSOliver Upton static int __kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
1233a7a2c72aSOliver Upton const struct kvm_vcpu_init *init)
1234a7a2c72aSOliver Upton {
1235a7a2c72aSOliver Upton unsigned long features = init->features[0];
12362251e9ffSOliver Upton struct kvm *kvm = vcpu->kvm;
12372251e9ffSOliver Upton int ret = -EINVAL;
12382251e9ffSOliver Upton
12392251e9ffSOliver Upton mutex_lock(&kvm->arch.config_lock);
12402251e9ffSOliver Upton
12412251e9ffSOliver Upton if (test_bit(KVM_ARCH_FLAG_VCPU_FEATURES_CONFIGURED, &kvm->arch.flags) &&
12422251e9ffSOliver Upton !bitmap_equal(kvm->arch.vcpu_features, &features, KVM_VCPU_MAX_FEATURES))
12432251e9ffSOliver Upton goto out_unlock;
1244a7a2c72aSOliver Upton
1245a7a2c72aSOliver Upton bitmap_copy(vcpu->arch.features, &features, KVM_VCPU_MAX_FEATURES);
12469ed24f4bSMarc Zyngier
12479ed24f4bSMarc Zyngier /* Now we know what it is, we can reset it. */
12489ed24f4bSMarc Zyngier ret = kvm_reset_vcpu(vcpu);
12499ed24f4bSMarc Zyngier if (ret) {
12509ed24f4bSMarc Zyngier bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
12512251e9ffSOliver Upton goto out_unlock;
12529ed24f4bSMarc Zyngier }
12539ed24f4bSMarc Zyngier
12542251e9ffSOliver Upton bitmap_copy(kvm->arch.vcpu_features, &features, KVM_VCPU_MAX_FEATURES);
12552251e9ffSOliver Upton set_bit(KVM_ARCH_FLAG_VCPU_FEATURES_CONFIGURED, &kvm->arch.flags);
1256ef984060SOliver Upton vcpu_set_flag(vcpu, VCPU_INITIALIZED);
12572251e9ffSOliver Upton out_unlock:
12582251e9ffSOliver Upton mutex_unlock(&kvm->arch.config_lock);
12599ed24f4bSMarc Zyngier return ret;
12609ed24f4bSMarc Zyngier }
12619ed24f4bSMarc Zyngier
kvm_vcpu_set_target(struct kvm_vcpu * vcpu,const struct kvm_vcpu_init * init)1262a7a2c72aSOliver Upton static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
1263a7a2c72aSOliver Upton const struct kvm_vcpu_init *init)
1264a7a2c72aSOliver Upton {
1265a7a2c72aSOliver Upton int ret;
1266a7a2c72aSOliver Upton
12675346f7e1SOliver Upton if (init->target != KVM_ARM_TARGET_GENERIC_V8 &&
12685346f7e1SOliver Upton init->target != kvm_target_cpu())
1269a7a2c72aSOliver Upton return -EINVAL;
1270a7a2c72aSOliver Upton
1271a7a2c72aSOliver Upton ret = kvm_vcpu_init_check_features(vcpu, init);
1272a7a2c72aSOliver Upton if (ret)
1273a7a2c72aSOliver Upton return ret;
1274a7a2c72aSOliver Upton
1275ef984060SOliver Upton if (!kvm_vcpu_initialized(vcpu))
1276a7a2c72aSOliver Upton return __kvm_vcpu_set_target(vcpu, init);
1277a7a2c72aSOliver Upton
1278a7a2c72aSOliver Upton if (kvm_vcpu_init_changed(vcpu, init))
1279a7a2c72aSOliver Upton return -EINVAL;
1280a7a2c72aSOliver Upton
1281a7a2c72aSOliver Upton return kvm_reset_vcpu(vcpu);
1282a7a2c72aSOliver Upton }
1283a7a2c72aSOliver Upton
kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu * vcpu,struct kvm_vcpu_init * init)12849ed24f4bSMarc Zyngier static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu,
12859ed24f4bSMarc Zyngier struct kvm_vcpu_init *init)
12869ed24f4bSMarc Zyngier {
1287e3c1c0caSOliver Upton bool power_off = false;
12889ed24f4bSMarc Zyngier int ret;
12899ed24f4bSMarc Zyngier
1290e3c1c0caSOliver Upton /*
1291e3c1c0caSOliver Upton * Treat the power-off vCPU feature as ephemeral. Clear the bit to avoid
1292e3c1c0caSOliver Upton * reflecting it in the finalized feature set, thus limiting its scope
1293e3c1c0caSOliver Upton * to a single KVM_ARM_VCPU_INIT call.
1294e3c1c0caSOliver Upton */
1295192df2aaSOliver Upton if (init->features[0] & BIT(KVM_ARM_VCPU_POWER_OFF)) {
1296192df2aaSOliver Upton init->features[0] &= ~BIT(KVM_ARM_VCPU_POWER_OFF);
1297e3c1c0caSOliver Upton power_off = true;
1298e3c1c0caSOliver Upton }
1299e3c1c0caSOliver Upton
13009ed24f4bSMarc Zyngier ret = kvm_vcpu_set_target(vcpu, init);
13019ed24f4bSMarc Zyngier if (ret)
13029ed24f4bSMarc Zyngier return ret;
13039ed24f4bSMarc Zyngier
13049ed24f4bSMarc Zyngier /*
13059ed24f4bSMarc Zyngier * Ensure a rebooted VM will fault in RAM pages and detect if the
13069ed24f4bSMarc Zyngier * guest MMU is turned off and flush the caches as needed.
1307892713e9SZenghui Yu *
13087ae2f3dbSMarc Zyngier * S2FWB enforces all memory accesses to RAM being cacheable,
13097ae2f3dbSMarc Zyngier * ensuring that the data side is always coherent. We still
13107ae2f3dbSMarc Zyngier * need to invalidate the I-cache though, as FWB does *not*
13117ae2f3dbSMarc Zyngier * imply CTR_EL0.DIC.
13129ed24f4bSMarc Zyngier */
1313cc5705fbSMarc Zyngier if (vcpu_has_run_once(vcpu)) {
13147ae2f3dbSMarc Zyngier if (!cpus_have_final_cap(ARM64_HAS_STAGE2_FWB))
13159ed24f4bSMarc Zyngier stage2_unmap_vm(vcpu->kvm);
13167ae2f3dbSMarc Zyngier else
1317fade9c2cSFuad Tabba icache_inval_all_pou();
13187ae2f3dbSMarc Zyngier }
13199ed24f4bSMarc Zyngier
13209ed24f4bSMarc Zyngier vcpu_reset_hcr(vcpu);
132175c76ab5SMarc Zyngier vcpu->arch.cptr_el2 = kvm_get_reset_cptr_el2(vcpu);
13229ed24f4bSMarc Zyngier
13239ed24f4bSMarc Zyngier /*
13249ed24f4bSMarc Zyngier * Handle the "start in power-off" case.
13259ed24f4bSMarc Zyngier */
13264ff910beSReiji Watanabe spin_lock(&vcpu->arch.mp_state_lock);
13274ff910beSReiji Watanabe
1328e3c1c0caSOliver Upton if (power_off)
13294ff910beSReiji Watanabe __kvm_arm_vcpu_power_off(vcpu);
13309ed24f4bSMarc Zyngier else
13310acc7239SOliver Upton WRITE_ONCE(vcpu->arch.mp_state.mp_state, KVM_MP_STATE_RUNNABLE);
13329ed24f4bSMarc Zyngier
13334ff910beSReiji Watanabe spin_unlock(&vcpu->arch.mp_state_lock);
13349ed24f4bSMarc Zyngier
13359ed24f4bSMarc Zyngier return 0;
13369ed24f4bSMarc Zyngier }
13379ed24f4bSMarc Zyngier
kvm_arm_vcpu_set_attr(struct kvm_vcpu * vcpu,struct kvm_device_attr * attr)13389ed24f4bSMarc Zyngier static int kvm_arm_vcpu_set_attr(struct kvm_vcpu *vcpu,
13399ed24f4bSMarc Zyngier struct kvm_device_attr *attr)
13409ed24f4bSMarc Zyngier {
13419ed24f4bSMarc Zyngier int ret = -ENXIO;
13429ed24f4bSMarc Zyngier
13439ed24f4bSMarc Zyngier switch (attr->group) {
13449ed24f4bSMarc Zyngier default:
13459ed24f4bSMarc Zyngier ret = kvm_arm_vcpu_arch_set_attr(vcpu, attr);
13469ed24f4bSMarc Zyngier break;
13479ed24f4bSMarc Zyngier }
13489ed24f4bSMarc Zyngier
13499ed24f4bSMarc Zyngier return ret;
13509ed24f4bSMarc Zyngier }
13519ed24f4bSMarc Zyngier
kvm_arm_vcpu_get_attr(struct kvm_vcpu * vcpu,struct kvm_device_attr * attr)13529ed24f4bSMarc Zyngier static int kvm_arm_vcpu_get_attr(struct kvm_vcpu *vcpu,
13539ed24f4bSMarc Zyngier struct kvm_device_attr *attr)
13549ed24f4bSMarc Zyngier {
13559ed24f4bSMarc Zyngier int ret = -ENXIO;
13569ed24f4bSMarc Zyngier
13579ed24f4bSMarc Zyngier switch (attr->group) {
13589ed24f4bSMarc Zyngier default:
13599ed24f4bSMarc Zyngier ret = kvm_arm_vcpu_arch_get_attr(vcpu, attr);
13609ed24f4bSMarc Zyngier break;
13619ed24f4bSMarc Zyngier }
13629ed24f4bSMarc Zyngier
13639ed24f4bSMarc Zyngier return ret;
13649ed24f4bSMarc Zyngier }
13659ed24f4bSMarc Zyngier
kvm_arm_vcpu_has_attr(struct kvm_vcpu * vcpu,struct kvm_device_attr * attr)13669ed24f4bSMarc Zyngier static int kvm_arm_vcpu_has_attr(struct kvm_vcpu *vcpu,
13679ed24f4bSMarc Zyngier struct kvm_device_attr *attr)
13689ed24f4bSMarc Zyngier {
13699ed24f4bSMarc Zyngier int ret = -ENXIO;
13709ed24f4bSMarc Zyngier
13719ed24f4bSMarc Zyngier switch (attr->group) {
13729ed24f4bSMarc Zyngier default:
13739ed24f4bSMarc Zyngier ret = kvm_arm_vcpu_arch_has_attr(vcpu, attr);
13749ed24f4bSMarc Zyngier break;
13759ed24f4bSMarc Zyngier }
13769ed24f4bSMarc Zyngier
13779ed24f4bSMarc Zyngier return ret;
13789ed24f4bSMarc Zyngier }
13799ed24f4bSMarc Zyngier
kvm_arm_vcpu_get_events(struct kvm_vcpu * vcpu,struct kvm_vcpu_events * events)13809ed24f4bSMarc Zyngier static int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,
13819ed24f4bSMarc Zyngier struct kvm_vcpu_events *events)
13829ed24f4bSMarc Zyngier {
13839ed24f4bSMarc Zyngier memset(events, 0, sizeof(*events));
13849ed24f4bSMarc Zyngier
13859ed24f4bSMarc Zyngier return __kvm_arm_vcpu_get_events(vcpu, events);
13869ed24f4bSMarc Zyngier }
13879ed24f4bSMarc Zyngier
kvm_arm_vcpu_set_events(struct kvm_vcpu * vcpu,struct kvm_vcpu_events * events)13889ed24f4bSMarc Zyngier static int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
13899ed24f4bSMarc Zyngier struct kvm_vcpu_events *events)
13909ed24f4bSMarc Zyngier {
13919ed24f4bSMarc Zyngier int i;
13929ed24f4bSMarc Zyngier
13939ed24f4bSMarc Zyngier /* check whether the reserved field is zero */
13949ed24f4bSMarc Zyngier for (i = 0; i < ARRAY_SIZE(events->reserved); i++)
13959ed24f4bSMarc Zyngier if (events->reserved[i])
13969ed24f4bSMarc Zyngier return -EINVAL;
13979ed24f4bSMarc Zyngier
13989ed24f4bSMarc Zyngier /* check whether the pad field is zero */
13999ed24f4bSMarc Zyngier for (i = 0; i < ARRAY_SIZE(events->exception.pad); i++)
14009ed24f4bSMarc Zyngier if (events->exception.pad[i])
14019ed24f4bSMarc Zyngier return -EINVAL;
14029ed24f4bSMarc Zyngier
14039ed24f4bSMarc Zyngier return __kvm_arm_vcpu_set_events(vcpu, events);
14049ed24f4bSMarc Zyngier }
14059ed24f4bSMarc Zyngier
kvm_arch_vcpu_ioctl(struct file * filp,unsigned int ioctl,unsigned long arg)14069ed24f4bSMarc Zyngier long kvm_arch_vcpu_ioctl(struct file *filp,
14079ed24f4bSMarc Zyngier unsigned int ioctl, unsigned long arg)
14089ed24f4bSMarc Zyngier {
14099ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu = filp->private_data;
14109ed24f4bSMarc Zyngier void __user *argp = (void __user *)arg;
14119ed24f4bSMarc Zyngier struct kvm_device_attr attr;
14129ed24f4bSMarc Zyngier long r;
14139ed24f4bSMarc Zyngier
14149ed24f4bSMarc Zyngier switch (ioctl) {
14159ed24f4bSMarc Zyngier case KVM_ARM_VCPU_INIT: {
14169ed24f4bSMarc Zyngier struct kvm_vcpu_init init;
14179ed24f4bSMarc Zyngier
14189ed24f4bSMarc Zyngier r = -EFAULT;
14199ed24f4bSMarc Zyngier if (copy_from_user(&init, argp, sizeof(init)))
14209ed24f4bSMarc Zyngier break;
14219ed24f4bSMarc Zyngier
14229ed24f4bSMarc Zyngier r = kvm_arch_vcpu_ioctl_vcpu_init(vcpu, &init);
14239ed24f4bSMarc Zyngier break;
14249ed24f4bSMarc Zyngier }
14259ed24f4bSMarc Zyngier case KVM_SET_ONE_REG:
14269ed24f4bSMarc Zyngier case KVM_GET_ONE_REG: {
14279ed24f4bSMarc Zyngier struct kvm_one_reg reg;
14289ed24f4bSMarc Zyngier
14299ed24f4bSMarc Zyngier r = -ENOEXEC;
14309ed24f4bSMarc Zyngier if (unlikely(!kvm_vcpu_initialized(vcpu)))
14319ed24f4bSMarc Zyngier break;
14329ed24f4bSMarc Zyngier
14339ed24f4bSMarc Zyngier r = -EFAULT;
14349ed24f4bSMarc Zyngier if (copy_from_user(®, argp, sizeof(reg)))
14359ed24f4bSMarc Zyngier break;
14369ed24f4bSMarc Zyngier
14376826c684SOliver Upton /*
14386826c684SOliver Upton * We could owe a reset due to PSCI. Handle the pending reset
14396826c684SOliver Upton * here to ensure userspace register accesses are ordered after
14406826c684SOliver Upton * the reset.
14416826c684SOliver Upton */
14426826c684SOliver Upton if (kvm_check_request(KVM_REQ_VCPU_RESET, vcpu))
14436826c684SOliver Upton kvm_reset_vcpu(vcpu);
14446826c684SOliver Upton
14459ed24f4bSMarc Zyngier if (ioctl == KVM_SET_ONE_REG)
14469ed24f4bSMarc Zyngier r = kvm_arm_set_reg(vcpu, ®);
14479ed24f4bSMarc Zyngier else
14489ed24f4bSMarc Zyngier r = kvm_arm_get_reg(vcpu, ®);
14499ed24f4bSMarc Zyngier break;
14509ed24f4bSMarc Zyngier }
14519ed24f4bSMarc Zyngier case KVM_GET_REG_LIST: {
14529ed24f4bSMarc Zyngier struct kvm_reg_list __user *user_list = argp;
14539ed24f4bSMarc Zyngier struct kvm_reg_list reg_list;
14549ed24f4bSMarc Zyngier unsigned n;
14559ed24f4bSMarc Zyngier
14569ed24f4bSMarc Zyngier r = -ENOEXEC;
14579ed24f4bSMarc Zyngier if (unlikely(!kvm_vcpu_initialized(vcpu)))
14589ed24f4bSMarc Zyngier break;
14599ed24f4bSMarc Zyngier
14609ed24f4bSMarc Zyngier r = -EPERM;
14619ed24f4bSMarc Zyngier if (!kvm_arm_vcpu_is_finalized(vcpu))
14629ed24f4bSMarc Zyngier break;
14639ed24f4bSMarc Zyngier
14649ed24f4bSMarc Zyngier r = -EFAULT;
14659ed24f4bSMarc Zyngier if (copy_from_user(®_list, user_list, sizeof(reg_list)))
14669ed24f4bSMarc Zyngier break;
14679ed24f4bSMarc Zyngier n = reg_list.n;
14689ed24f4bSMarc Zyngier reg_list.n = kvm_arm_num_regs(vcpu);
14699ed24f4bSMarc Zyngier if (copy_to_user(user_list, ®_list, sizeof(reg_list)))
14709ed24f4bSMarc Zyngier break;
14719ed24f4bSMarc Zyngier r = -E2BIG;
14729ed24f4bSMarc Zyngier if (n < reg_list.n)
14739ed24f4bSMarc Zyngier break;
14749ed24f4bSMarc Zyngier r = kvm_arm_copy_reg_indices(vcpu, user_list->reg);
14759ed24f4bSMarc Zyngier break;
14769ed24f4bSMarc Zyngier }
14779ed24f4bSMarc Zyngier case KVM_SET_DEVICE_ATTR: {
14789ed24f4bSMarc Zyngier r = -EFAULT;
14799ed24f4bSMarc Zyngier if (copy_from_user(&attr, argp, sizeof(attr)))
14809ed24f4bSMarc Zyngier break;
14819ed24f4bSMarc Zyngier r = kvm_arm_vcpu_set_attr(vcpu, &attr);
14829ed24f4bSMarc Zyngier break;
14839ed24f4bSMarc Zyngier }
14849ed24f4bSMarc Zyngier case KVM_GET_DEVICE_ATTR: {
14859ed24f4bSMarc Zyngier r = -EFAULT;
14869ed24f4bSMarc Zyngier if (copy_from_user(&attr, argp, sizeof(attr)))
14879ed24f4bSMarc Zyngier break;
14889ed24f4bSMarc Zyngier r = kvm_arm_vcpu_get_attr(vcpu, &attr);
14899ed24f4bSMarc Zyngier break;
14909ed24f4bSMarc Zyngier }
14919ed24f4bSMarc Zyngier case KVM_HAS_DEVICE_ATTR: {
14929ed24f4bSMarc Zyngier r = -EFAULT;
14939ed24f4bSMarc Zyngier if (copy_from_user(&attr, argp, sizeof(attr)))
14949ed24f4bSMarc Zyngier break;
14959ed24f4bSMarc Zyngier r = kvm_arm_vcpu_has_attr(vcpu, &attr);
14969ed24f4bSMarc Zyngier break;
14979ed24f4bSMarc Zyngier }
14989ed24f4bSMarc Zyngier case KVM_GET_VCPU_EVENTS: {
14999ed24f4bSMarc Zyngier struct kvm_vcpu_events events;
15009ed24f4bSMarc Zyngier
15019ed24f4bSMarc Zyngier if (kvm_arm_vcpu_get_events(vcpu, &events))
15029ed24f4bSMarc Zyngier return -EINVAL;
15039ed24f4bSMarc Zyngier
15049ed24f4bSMarc Zyngier if (copy_to_user(argp, &events, sizeof(events)))
15059ed24f4bSMarc Zyngier return -EFAULT;
15069ed24f4bSMarc Zyngier
15079ed24f4bSMarc Zyngier return 0;
15089ed24f4bSMarc Zyngier }
15099ed24f4bSMarc Zyngier case KVM_SET_VCPU_EVENTS: {
15109ed24f4bSMarc Zyngier struct kvm_vcpu_events events;
15119ed24f4bSMarc Zyngier
15129ed24f4bSMarc Zyngier if (copy_from_user(&events, argp, sizeof(events)))
15139ed24f4bSMarc Zyngier return -EFAULT;
15149ed24f4bSMarc Zyngier
15159ed24f4bSMarc Zyngier return kvm_arm_vcpu_set_events(vcpu, &events);
15169ed24f4bSMarc Zyngier }
15179ed24f4bSMarc Zyngier case KVM_ARM_VCPU_FINALIZE: {
15189ed24f4bSMarc Zyngier int what;
15199ed24f4bSMarc Zyngier
15209ed24f4bSMarc Zyngier if (!kvm_vcpu_initialized(vcpu))
15219ed24f4bSMarc Zyngier return -ENOEXEC;
15229ed24f4bSMarc Zyngier
15239ed24f4bSMarc Zyngier if (get_user(what, (const int __user *)argp))
15249ed24f4bSMarc Zyngier return -EFAULT;
15259ed24f4bSMarc Zyngier
15269ed24f4bSMarc Zyngier return kvm_arm_vcpu_finalize(vcpu, what);
15279ed24f4bSMarc Zyngier }
15289ed24f4bSMarc Zyngier default:
15299ed24f4bSMarc Zyngier r = -EINVAL;
15309ed24f4bSMarc Zyngier }
15319ed24f4bSMarc Zyngier
15329ed24f4bSMarc Zyngier return r;
15339ed24f4bSMarc Zyngier }
15349ed24f4bSMarc Zyngier
kvm_arch_sync_dirty_log(struct kvm * kvm,struct kvm_memory_slot * memslot)15359ed24f4bSMarc Zyngier void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
15369ed24f4bSMarc Zyngier {
15379ed24f4bSMarc Zyngier
15389ed24f4bSMarc Zyngier }
15399ed24f4bSMarc Zyngier
kvm_vm_ioctl_set_device_addr(struct kvm * kvm,struct kvm_arm_device_addr * dev_addr)15409ed24f4bSMarc Zyngier static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm,
15419ed24f4bSMarc Zyngier struct kvm_arm_device_addr *dev_addr)
15429ed24f4bSMarc Zyngier {
15439f968c92SMarc Zyngier switch (FIELD_GET(KVM_ARM_DEVICE_ID_MASK, dev_addr->id)) {
15449ed24f4bSMarc Zyngier case KVM_ARM_DEVICE_VGIC_V2:
15459ed24f4bSMarc Zyngier if (!vgic_present)
15469ed24f4bSMarc Zyngier return -ENXIO;
15479f968c92SMarc Zyngier return kvm_set_legacy_vgic_v2_addr(kvm, dev_addr);
15489ed24f4bSMarc Zyngier default:
15499ed24f4bSMarc Zyngier return -ENODEV;
15509ed24f4bSMarc Zyngier }
15519ed24f4bSMarc Zyngier }
15529ed24f4bSMarc Zyngier
kvm_vm_has_attr(struct kvm * kvm,struct kvm_device_attr * attr)1553e0fc6b21SOliver Upton static int kvm_vm_has_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1554e0fc6b21SOliver Upton {
1555e0fc6b21SOliver Upton switch (attr->group) {
1556821d935cSOliver Upton case KVM_ARM_VM_SMCCC_CTRL:
1557821d935cSOliver Upton return kvm_vm_smccc_has_attr(kvm, attr);
1558e0fc6b21SOliver Upton default:
1559e0fc6b21SOliver Upton return -ENXIO;
1560e0fc6b21SOliver Upton }
1561e0fc6b21SOliver Upton }
1562e0fc6b21SOliver Upton
kvm_vm_set_attr(struct kvm * kvm,struct kvm_device_attr * attr)1563e0fc6b21SOliver Upton static int kvm_vm_set_attr(struct kvm *kvm, struct kvm_device_attr *attr)
1564e0fc6b21SOliver Upton {
1565e0fc6b21SOliver Upton switch (attr->group) {
1566821d935cSOliver Upton case KVM_ARM_VM_SMCCC_CTRL:
1567821d935cSOliver Upton return kvm_vm_smccc_set_attr(kvm, attr);
1568e0fc6b21SOliver Upton default:
1569e0fc6b21SOliver Upton return -ENXIO;
1570e0fc6b21SOliver Upton }
1571e0fc6b21SOliver Upton }
1572e0fc6b21SOliver Upton
kvm_arch_vm_ioctl(struct file * filp,unsigned int ioctl,unsigned long arg)1573d8708b80SThomas Huth int kvm_arch_vm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
15749ed24f4bSMarc Zyngier {
15759ed24f4bSMarc Zyngier struct kvm *kvm = filp->private_data;
15769ed24f4bSMarc Zyngier void __user *argp = (void __user *)arg;
1577e0fc6b21SOliver Upton struct kvm_device_attr attr;
15789ed24f4bSMarc Zyngier
15799ed24f4bSMarc Zyngier switch (ioctl) {
15809ed24f4bSMarc Zyngier case KVM_CREATE_IRQCHIP: {
15819ed24f4bSMarc Zyngier int ret;
15829ed24f4bSMarc Zyngier if (!vgic_present)
15839ed24f4bSMarc Zyngier return -ENXIO;
15849ed24f4bSMarc Zyngier mutex_lock(&kvm->lock);
15859ed24f4bSMarc Zyngier ret = kvm_vgic_create(kvm, KVM_DEV_TYPE_ARM_VGIC_V2);
15869ed24f4bSMarc Zyngier mutex_unlock(&kvm->lock);
15879ed24f4bSMarc Zyngier return ret;
15889ed24f4bSMarc Zyngier }
15899ed24f4bSMarc Zyngier case KVM_ARM_SET_DEVICE_ADDR: {
15909ed24f4bSMarc Zyngier struct kvm_arm_device_addr dev_addr;
15919ed24f4bSMarc Zyngier
15929ed24f4bSMarc Zyngier if (copy_from_user(&dev_addr, argp, sizeof(dev_addr)))
15939ed24f4bSMarc Zyngier return -EFAULT;
15949ed24f4bSMarc Zyngier return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr);
15959ed24f4bSMarc Zyngier }
15969ed24f4bSMarc Zyngier case KVM_ARM_PREFERRED_TARGET: {
15975346f7e1SOliver Upton struct kvm_vcpu_init init = {
15985346f7e1SOliver Upton .target = KVM_ARM_TARGET_GENERIC_V8,
15995346f7e1SOliver Upton };
16009ed24f4bSMarc Zyngier
16019ed24f4bSMarc Zyngier if (copy_to_user(argp, &init, sizeof(init)))
16029ed24f4bSMarc Zyngier return -EFAULT;
16039ed24f4bSMarc Zyngier
16049ed24f4bSMarc Zyngier return 0;
16059ed24f4bSMarc Zyngier }
1606f0376edbSSteven Price case KVM_ARM_MTE_COPY_TAGS: {
1607f0376edbSSteven Price struct kvm_arm_copy_mte_tags copy_tags;
1608f0376edbSSteven Price
1609f0376edbSSteven Price if (copy_from_user(©_tags, argp, sizeof(copy_tags)))
1610f0376edbSSteven Price return -EFAULT;
1611f0376edbSSteven Price return kvm_vm_ioctl_mte_copy_tags(kvm, ©_tags);
1612f0376edbSSteven Price }
161330ec7997SMarc Zyngier case KVM_ARM_SET_COUNTER_OFFSET: {
161430ec7997SMarc Zyngier struct kvm_arm_counter_offset offset;
161530ec7997SMarc Zyngier
161630ec7997SMarc Zyngier if (copy_from_user(&offset, argp, sizeof(offset)))
161730ec7997SMarc Zyngier return -EFAULT;
161830ec7997SMarc Zyngier return kvm_vm_ioctl_set_counter_offset(kvm, &offset);
161930ec7997SMarc Zyngier }
1620e0fc6b21SOliver Upton case KVM_HAS_DEVICE_ATTR: {
1621e0fc6b21SOliver Upton if (copy_from_user(&attr, argp, sizeof(attr)))
1622e0fc6b21SOliver Upton return -EFAULT;
1623e0fc6b21SOliver Upton
1624e0fc6b21SOliver Upton return kvm_vm_has_attr(kvm, &attr);
1625e0fc6b21SOliver Upton }
1626e0fc6b21SOliver Upton case KVM_SET_DEVICE_ATTR: {
1627e0fc6b21SOliver Upton if (copy_from_user(&attr, argp, sizeof(attr)))
1628e0fc6b21SOliver Upton return -EFAULT;
1629e0fc6b21SOliver Upton
1630e0fc6b21SOliver Upton return kvm_vm_set_attr(kvm, &attr);
1631e0fc6b21SOliver Upton }
16329ed24f4bSMarc Zyngier default:
16339ed24f4bSMarc Zyngier return -EINVAL;
16349ed24f4bSMarc Zyngier }
16359ed24f4bSMarc Zyngier }
16369ed24f4bSMarc Zyngier
163796906a91SMarc Zyngier /* unlocks vcpus from @vcpu_lock_idx and smaller */
unlock_vcpus(struct kvm * kvm,int vcpu_lock_idx)163896906a91SMarc Zyngier static void unlock_vcpus(struct kvm *kvm, int vcpu_lock_idx)
163996906a91SMarc Zyngier {
164096906a91SMarc Zyngier struct kvm_vcpu *tmp_vcpu;
164196906a91SMarc Zyngier
164296906a91SMarc Zyngier for (; vcpu_lock_idx >= 0; vcpu_lock_idx--) {
164396906a91SMarc Zyngier tmp_vcpu = kvm_get_vcpu(kvm, vcpu_lock_idx);
164496906a91SMarc Zyngier mutex_unlock(&tmp_vcpu->mutex);
164596906a91SMarc Zyngier }
164696906a91SMarc Zyngier }
164796906a91SMarc Zyngier
unlock_all_vcpus(struct kvm * kvm)164896906a91SMarc Zyngier void unlock_all_vcpus(struct kvm *kvm)
164996906a91SMarc Zyngier {
165096906a91SMarc Zyngier lockdep_assert_held(&kvm->lock);
165196906a91SMarc Zyngier
165296906a91SMarc Zyngier unlock_vcpus(kvm, atomic_read(&kvm->online_vcpus) - 1);
165396906a91SMarc Zyngier }
165496906a91SMarc Zyngier
165596906a91SMarc Zyngier /* Returns true if all vcpus were locked, false otherwise */
lock_all_vcpus(struct kvm * kvm)165696906a91SMarc Zyngier bool lock_all_vcpus(struct kvm *kvm)
165796906a91SMarc Zyngier {
165896906a91SMarc Zyngier struct kvm_vcpu *tmp_vcpu;
165996906a91SMarc Zyngier unsigned long c;
166096906a91SMarc Zyngier
166196906a91SMarc Zyngier lockdep_assert_held(&kvm->lock);
166296906a91SMarc Zyngier
166396906a91SMarc Zyngier /*
166496906a91SMarc Zyngier * Any time a vcpu is in an ioctl (including running), the
166596906a91SMarc Zyngier * core KVM code tries to grab the vcpu->mutex.
166696906a91SMarc Zyngier *
166796906a91SMarc Zyngier * By grabbing the vcpu->mutex of all VCPUs we ensure that no
166896906a91SMarc Zyngier * other VCPUs can fiddle with the state while we access it.
166996906a91SMarc Zyngier */
167096906a91SMarc Zyngier kvm_for_each_vcpu(c, tmp_vcpu, kvm) {
167196906a91SMarc Zyngier if (!mutex_trylock(&tmp_vcpu->mutex)) {
167296906a91SMarc Zyngier unlock_vcpus(kvm, c - 1);
167396906a91SMarc Zyngier return false;
167496906a91SMarc Zyngier }
167596906a91SMarc Zyngier }
167696906a91SMarc Zyngier
167796906a91SMarc Zyngier return true;
167896906a91SMarc Zyngier }
167996906a91SMarc Zyngier
nvhe_percpu_size(void)168030c95391SDavid Brazdil static unsigned long nvhe_percpu_size(void)
168130c95391SDavid Brazdil {
168230c95391SDavid Brazdil return (unsigned long)CHOOSE_NVHE_SYM(__per_cpu_end) -
168330c95391SDavid Brazdil (unsigned long)CHOOSE_NVHE_SYM(__per_cpu_start);
168430c95391SDavid Brazdil }
168530c95391SDavid Brazdil
nvhe_percpu_order(void)168630c95391SDavid Brazdil static unsigned long nvhe_percpu_order(void)
168730c95391SDavid Brazdil {
168830c95391SDavid Brazdil unsigned long size = nvhe_percpu_size();
168930c95391SDavid Brazdil
169030c95391SDavid Brazdil return size ? get_order(size) : 0;
169130c95391SDavid Brazdil }
169230c95391SDavid Brazdil
1693b881cdceSWill Deacon /* A lookup table holding the hypervisor VA for each vector slot */
1694b881cdceSWill Deacon static void *hyp_spectre_vector_selector[BP_HARDEN_EL2_SLOTS];
1695de5bcdb4SWill Deacon
kvm_init_vector_slot(void * base,enum arm64_hyp_spectre_vector slot)1696b881cdceSWill Deacon static void kvm_init_vector_slot(void *base, enum arm64_hyp_spectre_vector slot)
1697b881cdceSWill Deacon {
1698bc1d2892SQuentin Perret hyp_spectre_vector_selector[slot] = __kvm_vector_slot2addr(base, slot);
16999ef2b48bSWill Deacon }
17009ef2b48bSWill Deacon
kvm_init_vector_slots(void)1701b881cdceSWill Deacon static int kvm_init_vector_slots(void)
1702b881cdceSWill Deacon {
1703b881cdceSWill Deacon int err;
1704b881cdceSWill Deacon void *base;
1705b881cdceSWill Deacon
1706b881cdceSWill Deacon base = kern_hyp_va(kvm_ksym_ref(__kvm_hyp_vector));
1707b881cdceSWill Deacon kvm_init_vector_slot(base, HYP_VECTOR_DIRECT);
1708b881cdceSWill Deacon
1709b881cdceSWill Deacon base = kern_hyp_va(kvm_ksym_ref(__bp_harden_hyp_vecs));
1710b881cdceSWill Deacon kvm_init_vector_slot(base, HYP_VECTOR_SPECTRE_DIRECT);
1711b881cdceSWill Deacon
17122e403167SQuentin Perret if (kvm_system_needs_idmapped_vectors() &&
17132e403167SQuentin Perret !is_protected_kvm_enabled()) {
1714b881cdceSWill Deacon err = create_hyp_exec_mappings(__pa_symbol(__bp_harden_hyp_vecs),
1715b881cdceSWill Deacon __BP_HARDEN_HYP_VECS_SZ, &base);
1716b881cdceSWill Deacon if (err)
1717b881cdceSWill Deacon return err;
1718b881cdceSWill Deacon }
17199ef2b48bSWill Deacon
1720b881cdceSWill Deacon kvm_init_vector_slot(base, HYP_VECTOR_INDIRECT);
1721b881cdceSWill Deacon kvm_init_vector_slot(base, HYP_VECTOR_SPECTRE_INDIRECT);
17229ef2b48bSWill Deacon return 0;
17239ef2b48bSWill Deacon }
17249ef2b48bSWill Deacon
cpu_prepare_hyp_mode(int cpu,u32 hyp_va_bits)172553bf620aSSean Christopherson static void __init cpu_prepare_hyp_mode(int cpu, u32 hyp_va_bits)
17269ed24f4bSMarc Zyngier {
17279cc77581SQuentin Perret struct kvm_nvhe_init_params *params = per_cpu_ptr_nvhe_sym(kvm_init_params, cpu);
1728d3e1086cSDavid Brazdil unsigned long tcr;
17299ed24f4bSMarc Zyngier
173071b3ec5fSDavid Brazdil /*
173171b3ec5fSDavid Brazdil * Calculate the raw per-cpu offset without a translation from the
173271b3ec5fSDavid Brazdil * kernel's mapping to the linear mapping, and store it in tpidr_el2
173371b3ec5fSDavid Brazdil * so that we can use adr_l to access per-cpu variables in EL2.
1734e1663372SSteven Price * Also drop the KASAN tag which gets in the way...
173571b3ec5fSDavid Brazdil */
17369cc77581SQuentin Perret params->tpidr_el2 = (unsigned long)kasan_reset_tag(per_cpu_ptr_nvhe_sym(__per_cpu_start, cpu)) -
173730c95391SDavid Brazdil (unsigned long)kvm_ksym_ref(CHOOSE_NVHE_SYM(__per_cpu_start));
173871b3ec5fSDavid Brazdil
1739d3e1086cSDavid Brazdil params->mair_el2 = read_sysreg(mair_el1);
1740d3e1086cSDavid Brazdil
1741cff3b5cfSMarc Zyngier tcr = read_sysreg(tcr_el1);
1742cff3b5cfSMarc Zyngier if (cpus_have_final_cap(ARM64_KVM_HVHE)) {
1743cff3b5cfSMarc Zyngier tcr |= TCR_EPD1_MASK;
1744cff3b5cfSMarc Zyngier } else {
1745cff3b5cfSMarc Zyngier tcr &= TCR_EL2_MASK;
1746cff3b5cfSMarc Zyngier tcr |= TCR_EL2_RES1;
1747cff3b5cfSMarc Zyngier }
1748d3e1086cSDavid Brazdil tcr &= ~TCR_T0SZ_MASK;
1749579d7ebeSRyan Roberts tcr |= TCR_T0SZ(hyp_va_bits);
1750d3e1086cSDavid Brazdil params->tcr_el2 = tcr;
1751d3e1086cSDavid Brazdil
175263fec243SDavid Brazdil params->pgd_pa = kvm_mmu_get_httbr();
1753734864c1SQuentin Perret if (is_protected_kvm_enabled())
1754734864c1SQuentin Perret params->hcr_el2 = HCR_HOST_NVHE_PROTECTED_FLAGS;
1755734864c1SQuentin Perret else
1756734864c1SQuentin Perret params->hcr_el2 = HCR_HOST_NVHE_FLAGS;
1757d0daf5a2SMarc Zyngier if (cpus_have_final_cap(ARM64_KVM_HVHE))
1758d0daf5a2SMarc Zyngier params->hcr_el2 |= HCR_E2H;
1759734864c1SQuentin Perret params->vttbr = params->vtcr = 0;
176063fec243SDavid Brazdil
176163fec243SDavid Brazdil /*
176263fec243SDavid Brazdil * Flush the init params from the data cache because the struct will
176363fec243SDavid Brazdil * be read while the MMU is off.
176463fec243SDavid Brazdil */
176563fec243SDavid Brazdil kvm_flush_dcache_to_poc(params, sizeof(*params));
17669cc77581SQuentin Perret }
17679cc77581SQuentin Perret
hyp_install_host_vector(void)1768bfa79a80SQuentin Perret static void hyp_install_host_vector(void)
17699cc77581SQuentin Perret {
17709cc77581SQuentin Perret struct kvm_nvhe_init_params *params;
17719cc77581SQuentin Perret struct arm_smccc_res res;
17729cc77581SQuentin Perret
17739cc77581SQuentin Perret /* Switch from the HYP stub to our own HYP init vector */
17749cc77581SQuentin Perret __hyp_set_vectors(kvm_get_idmap_vector());
17759ed24f4bSMarc Zyngier
177671b3ec5fSDavid Brazdil /*
177771b3ec5fSDavid Brazdil * Call initialization code, and switch to the full blown HYP code.
177871b3ec5fSDavid Brazdil * If the cpucaps haven't been finalized yet, something has gone very
177971b3ec5fSDavid Brazdil * wrong, and hyp will crash and burn when it uses any
178071b3ec5fSDavid Brazdil * cpus_have_const_cap() wrapper.
178171b3ec5fSDavid Brazdil */
178271b3ec5fSDavid Brazdil BUG_ON(!system_capabilities_finalized());
17839cc77581SQuentin Perret params = this_cpu_ptr_nvhe_sym(kvm_init_params);
178463fec243SDavid Brazdil arm_smccc_1_1_hvc(KVM_HOST_SMCCC_FUNC(__kvm_hyp_init), virt_to_phys(params), &res);
178504e4caa8SAndrew Scull WARN_ON(res.a0 != SMCCC_RET_SUCCESS);
1786bfa79a80SQuentin Perret }
1787bfa79a80SQuentin Perret
cpu_init_hyp_mode(void)1788bfa79a80SQuentin Perret static void cpu_init_hyp_mode(void)
1789bfa79a80SQuentin Perret {
1790bfa79a80SQuentin Perret hyp_install_host_vector();
179171b3ec5fSDavid Brazdil
179271b3ec5fSDavid Brazdil /*
179371b3ec5fSDavid Brazdil * Disabling SSBD on a non-VHE system requires us to enable SSBS
179471b3ec5fSDavid Brazdil * at EL2.
179571b3ec5fSDavid Brazdil */
179671b3ec5fSDavid Brazdil if (this_cpu_has_cap(ARM64_SSBS) &&
1797d63d975aSMarc Zyngier arm64_get_spectre_v4_state() == SPECTRE_VULNERABLE) {
179813aeb9b4SDavid Brazdil kvm_call_hyp_nvhe(__kvm_enable_ssbs);
179971b3ec5fSDavid Brazdil }
18009ed24f4bSMarc Zyngier }
18019ed24f4bSMarc Zyngier
cpu_hyp_reset(void)18029ed24f4bSMarc Zyngier static void cpu_hyp_reset(void)
18039ed24f4bSMarc Zyngier {
18049ed24f4bSMarc Zyngier if (!is_kernel_in_hyp_mode())
18059ed24f4bSMarc Zyngier __hyp_reset_vectors();
18069ed24f4bSMarc Zyngier }
18079ed24f4bSMarc Zyngier
1808042c76a9SWill Deacon /*
1809042c76a9SWill Deacon * EL2 vectors can be mapped and rerouted in a number of ways,
1810042c76a9SWill Deacon * depending on the kernel configuration and CPU present:
1811042c76a9SWill Deacon *
1812042c76a9SWill Deacon * - If the CPU is affected by Spectre-v2, the hardening sequence is
1813042c76a9SWill Deacon * placed in one of the vector slots, which is executed before jumping
1814042c76a9SWill Deacon * to the real vectors.
1815042c76a9SWill Deacon *
1816c4792b6dSWill Deacon * - If the CPU also has the ARM64_SPECTRE_V3A cap, the slot
1817042c76a9SWill Deacon * containing the hardening sequence is mapped next to the idmap page,
1818042c76a9SWill Deacon * and executed before jumping to the real vectors.
1819042c76a9SWill Deacon *
1820c4792b6dSWill Deacon * - If the CPU only has the ARM64_SPECTRE_V3A cap, then an
1821042c76a9SWill Deacon * empty slot is selected, mapped next to the idmap page, and
1822042c76a9SWill Deacon * executed before jumping to the real vectors.
1823042c76a9SWill Deacon *
1824c4792b6dSWill Deacon * Note that ARM64_SPECTRE_V3A is somewhat incompatible with
1825042c76a9SWill Deacon * VHE, as we don't have hypervisor-specific mappings. If the system
1826042c76a9SWill Deacon * is VHE and yet selects this capability, it will be ignored.
1827042c76a9SWill Deacon */
cpu_set_hyp_vector(void)1828042c76a9SWill Deacon static void cpu_set_hyp_vector(void)
1829042c76a9SWill Deacon {
18306279017eSWill Deacon struct bp_hardening_data *data = this_cpu_ptr(&bp_hardening_data);
1831b881cdceSWill Deacon void *vector = hyp_spectre_vector_selector[data->slot];
1832042c76a9SWill Deacon
1833bfa79a80SQuentin Perret if (!is_protected_kvm_enabled())
1834b881cdceSWill Deacon *this_cpu_ptr_hyp_sym(kvm_hyp_vector) = (unsigned long)vector;
1835bfa79a80SQuentin Perret else
1836bfa79a80SQuentin Perret kvm_call_hyp_nvhe(__pkvm_cpu_set_vector, data->slot);
1837042c76a9SWill Deacon }
1838042c76a9SWill Deacon
cpu_hyp_init_context(void)18398579a185SWill Deacon static void cpu_hyp_init_context(void)
18409ed24f4bSMarc Zyngier {
18412a1198c9SDavid Brazdil kvm_init_host_cpu_context(&this_cpu_ptr_hyp_sym(kvm_host_data)->host_ctxt);
18429ed24f4bSMarc Zyngier
18438579a185SWill Deacon if (!is_kernel_in_hyp_mode())
18448579a185SWill Deacon cpu_init_hyp_mode();
18458579a185SWill Deacon }
18468579a185SWill Deacon
cpu_hyp_init_features(void)18478579a185SWill Deacon static void cpu_hyp_init_features(void)
18488579a185SWill Deacon {
18498579a185SWill Deacon cpu_set_hyp_vector();
18508579a185SWill Deacon kvm_arm_init_debug();
1851a0e47952SAndrew Scull
18529ed24f4bSMarc Zyngier if (is_kernel_in_hyp_mode())
18539ed24f4bSMarc Zyngier kvm_timer_init_vhe();
18549ed24f4bSMarc Zyngier
18559ed24f4bSMarc Zyngier if (vgic_present)
18569ed24f4bSMarc Zyngier kvm_vgic_init_cpu_hardware();
18579ed24f4bSMarc Zyngier }
18589ed24f4bSMarc Zyngier
cpu_hyp_reinit(void)18598579a185SWill Deacon static void cpu_hyp_reinit(void)
18608579a185SWill Deacon {
18618579a185SWill Deacon cpu_hyp_reset();
18628579a185SWill Deacon cpu_hyp_init_context();
18638579a185SWill Deacon cpu_hyp_init_features();
18648579a185SWill Deacon }
18658579a185SWill Deacon
cpu_hyp_init(void * discard)1866733c758eSOliver Upton static void cpu_hyp_init(void *discard)
18679ed24f4bSMarc Zyngier {
1868733c758eSOliver Upton if (!__this_cpu_read(kvm_hyp_initialized)) {
18699ed24f4bSMarc Zyngier cpu_hyp_reinit();
1870733c758eSOliver Upton __this_cpu_write(kvm_hyp_initialized, 1);
1871733c758eSOliver Upton }
1872733c758eSOliver Upton }
1873733c758eSOliver Upton
cpu_hyp_uninit(void * discard)1874733c758eSOliver Upton static void cpu_hyp_uninit(void *discard)
1875733c758eSOliver Upton {
1876733c758eSOliver Upton if (__this_cpu_read(kvm_hyp_initialized)) {
1877733c758eSOliver Upton cpu_hyp_reset();
1878733c758eSOliver Upton __this_cpu_write(kvm_hyp_initialized, 0);
18799ed24f4bSMarc Zyngier }
18809ed24f4bSMarc Zyngier }
18819ed24f4bSMarc Zyngier
kvm_arch_hardware_enable(void)18829ed24f4bSMarc Zyngier int kvm_arch_hardware_enable(void)
18839ed24f4bSMarc Zyngier {
1884970dee09SMarc Zyngier /*
1885970dee09SMarc Zyngier * Most calls to this function are made with migration
1886970dee09SMarc Zyngier * disabled, but not with preemption disabled. The former is
1887970dee09SMarc Zyngier * enough to ensure correctness, but most of the helpers
1888970dee09SMarc Zyngier * expect the later and will throw a tantrum otherwise.
1889970dee09SMarc Zyngier */
1890970dee09SMarc Zyngier preempt_disable();
1891970dee09SMarc Zyngier
1892733c758eSOliver Upton cpu_hyp_init(NULL);
1893466d27e4SMarc Zyngier
1894466d27e4SMarc Zyngier kvm_vgic_cpu_up();
1895466d27e4SMarc Zyngier kvm_timer_cpu_up();
1896466d27e4SMarc Zyngier
1897970dee09SMarc Zyngier preempt_enable();
1898970dee09SMarc Zyngier
18999ed24f4bSMarc Zyngier return 0;
19009ed24f4bSMarc Zyngier }
19019ed24f4bSMarc Zyngier
kvm_arch_hardware_disable(void)19029ed24f4bSMarc Zyngier void kvm_arch_hardware_disable(void)
19039ed24f4bSMarc Zyngier {
1904466d27e4SMarc Zyngier kvm_timer_cpu_down();
1905466d27e4SMarc Zyngier kvm_vgic_cpu_down();
1906466d27e4SMarc Zyngier
1907fa8c3d65SDavid Brazdil if (!is_protected_kvm_enabled())
1908733c758eSOliver Upton cpu_hyp_uninit(NULL);
19099ed24f4bSMarc Zyngier }
19109ed24f4bSMarc Zyngier
19119ed24f4bSMarc Zyngier #ifdef CONFIG_CPU_PM
hyp_init_cpu_pm_notifier(struct notifier_block * self,unsigned long cmd,void * v)19129ed24f4bSMarc Zyngier static int hyp_init_cpu_pm_notifier(struct notifier_block *self,
19139ed24f4bSMarc Zyngier unsigned long cmd,
19149ed24f4bSMarc Zyngier void *v)
19159ed24f4bSMarc Zyngier {
19169ed24f4bSMarc Zyngier /*
1917733c758eSOliver Upton * kvm_hyp_initialized is left with its old value over
19189ed24f4bSMarc Zyngier * PM_ENTER->PM_EXIT. It is used to indicate PM_EXIT should
19199ed24f4bSMarc Zyngier * re-enable hyp.
19209ed24f4bSMarc Zyngier */
19219ed24f4bSMarc Zyngier switch (cmd) {
19229ed24f4bSMarc Zyngier case CPU_PM_ENTER:
1923733c758eSOliver Upton if (__this_cpu_read(kvm_hyp_initialized))
19249ed24f4bSMarc Zyngier /*
1925733c758eSOliver Upton * don't update kvm_hyp_initialized here
1926733c758eSOliver Upton * so that the hyp will be re-enabled
19279ed24f4bSMarc Zyngier * when we resume. See below.
19289ed24f4bSMarc Zyngier */
19299ed24f4bSMarc Zyngier cpu_hyp_reset();
19309ed24f4bSMarc Zyngier
19319ed24f4bSMarc Zyngier return NOTIFY_OK;
19329ed24f4bSMarc Zyngier case CPU_PM_ENTER_FAILED:
19339ed24f4bSMarc Zyngier case CPU_PM_EXIT:
1934733c758eSOliver Upton if (__this_cpu_read(kvm_hyp_initialized))
1935733c758eSOliver Upton /* The hyp was enabled before suspend. */
19369ed24f4bSMarc Zyngier cpu_hyp_reinit();
19379ed24f4bSMarc Zyngier
19389ed24f4bSMarc Zyngier return NOTIFY_OK;
19399ed24f4bSMarc Zyngier
19409ed24f4bSMarc Zyngier default:
19419ed24f4bSMarc Zyngier return NOTIFY_DONE;
19429ed24f4bSMarc Zyngier }
19439ed24f4bSMarc Zyngier }
19449ed24f4bSMarc Zyngier
19459ed24f4bSMarc Zyngier static struct notifier_block hyp_init_cpu_pm_nb = {
19469ed24f4bSMarc Zyngier .notifier_call = hyp_init_cpu_pm_notifier,
19479ed24f4bSMarc Zyngier };
19489ed24f4bSMarc Zyngier
hyp_cpu_pm_init(void)194953bf620aSSean Christopherson static void __init hyp_cpu_pm_init(void)
19509ed24f4bSMarc Zyngier {
1951fa8c3d65SDavid Brazdil if (!is_protected_kvm_enabled())
19529ed24f4bSMarc Zyngier cpu_pm_register_notifier(&hyp_init_cpu_pm_nb);
19539ed24f4bSMarc Zyngier }
hyp_cpu_pm_exit(void)195453bf620aSSean Christopherson static void __init hyp_cpu_pm_exit(void)
19559ed24f4bSMarc Zyngier {
1956fa8c3d65SDavid Brazdil if (!is_protected_kvm_enabled())
19579ed24f4bSMarc Zyngier cpu_pm_unregister_notifier(&hyp_init_cpu_pm_nb);
19589ed24f4bSMarc Zyngier }
19599ed24f4bSMarc Zyngier #else
hyp_cpu_pm_init(void)196053bf620aSSean Christopherson static inline void __init hyp_cpu_pm_init(void)
19619ed24f4bSMarc Zyngier {
19629ed24f4bSMarc Zyngier }
hyp_cpu_pm_exit(void)196353bf620aSSean Christopherson static inline void __init hyp_cpu_pm_exit(void)
19649ed24f4bSMarc Zyngier {
19659ed24f4bSMarc Zyngier }
19669ed24f4bSMarc Zyngier #endif
19679ed24f4bSMarc Zyngier
init_cpu_logical_map(void)196853bf620aSSean Christopherson static void __init init_cpu_logical_map(void)
196994f5e8a4SDavid Brazdil {
197094f5e8a4SDavid Brazdil unsigned int cpu;
197194f5e8a4SDavid Brazdil
197294f5e8a4SDavid Brazdil /*
197394f5e8a4SDavid Brazdil * Copy the MPIDR <-> logical CPU ID mapping to hyp.
197421ea4578SJulia Lawall * Only copy the set of online CPUs whose features have been checked
197594f5e8a4SDavid Brazdil * against the finalized system capabilities. The hypervisor will not
197694f5e8a4SDavid Brazdil * allow any other CPUs from the `possible` set to boot.
197794f5e8a4SDavid Brazdil */
197894f5e8a4SDavid Brazdil for_each_online_cpu(cpu)
197961fe0c37SDavid Brazdil hyp_cpu_logical_map[cpu] = cpu_logical_map(cpu);
198094f5e8a4SDavid Brazdil }
198194f5e8a4SDavid Brazdil
1982767c973fSMarc Zyngier #define init_psci_0_1_impl_state(config, what) \
1983767c973fSMarc Zyngier config.psci_0_1_ ## what ## _implemented = psci_ops.what
1984767c973fSMarc Zyngier
init_psci_relay(void)198553bf620aSSean Christopherson static bool __init init_psci_relay(void)
1986eeeee719SDavid Brazdil {
1987eeeee719SDavid Brazdil /*
1988eeeee719SDavid Brazdil * If PSCI has not been initialized, protected KVM cannot install
1989eeeee719SDavid Brazdil * itself on newly booted CPUs.
1990eeeee719SDavid Brazdil */
1991eeeee719SDavid Brazdil if (!psci_ops.get_version) {
1992eeeee719SDavid Brazdil kvm_err("Cannot initialize protected mode without PSCI\n");
1993eeeee719SDavid Brazdil return false;
1994eeeee719SDavid Brazdil }
1995eeeee719SDavid Brazdil
1996ff367fe4SDavid Brazdil kvm_host_psci_config.version = psci_ops.get_version();
199712bdce4fSWill Deacon kvm_host_psci_config.smccc_version = arm_smccc_get_version();
1998ff367fe4SDavid Brazdil
1999ff367fe4SDavid Brazdil if (kvm_host_psci_config.version == PSCI_VERSION(0, 1)) {
2000ff367fe4SDavid Brazdil kvm_host_psci_config.function_ids_0_1 = get_psci_0_1_function_ids();
2001767c973fSMarc Zyngier init_psci_0_1_impl_state(kvm_host_psci_config, cpu_suspend);
2002767c973fSMarc Zyngier init_psci_0_1_impl_state(kvm_host_psci_config, cpu_on);
2003767c973fSMarc Zyngier init_psci_0_1_impl_state(kvm_host_psci_config, cpu_off);
2004767c973fSMarc Zyngier init_psci_0_1_impl_state(kvm_host_psci_config, migrate);
2005ff367fe4SDavid Brazdil }
2006eeeee719SDavid Brazdil return true;
2007eeeee719SDavid Brazdil }
2008eeeee719SDavid Brazdil
init_subsystems(void)200953bf620aSSean Christopherson static int __init init_subsystems(void)
20109ed24f4bSMarc Zyngier {
20119ed24f4bSMarc Zyngier int err = 0;
20129ed24f4bSMarc Zyngier
20139ed24f4bSMarc Zyngier /*
20149ed24f4bSMarc Zyngier * Enable hardware so that subsystem initialisation can access EL2.
20159ed24f4bSMarc Zyngier */
2016733c758eSOliver Upton on_each_cpu(cpu_hyp_init, NULL, 1);
20179ed24f4bSMarc Zyngier
20189ed24f4bSMarc Zyngier /*
20199ed24f4bSMarc Zyngier * Register CPU lower-power notifier
20209ed24f4bSMarc Zyngier */
20219ed24f4bSMarc Zyngier hyp_cpu_pm_init();
20229ed24f4bSMarc Zyngier
20239ed24f4bSMarc Zyngier /*
20249ed24f4bSMarc Zyngier * Init HYP view of VGIC
20259ed24f4bSMarc Zyngier */
20269ed24f4bSMarc Zyngier err = kvm_vgic_hyp_init();
20279ed24f4bSMarc Zyngier switch (err) {
20289ed24f4bSMarc Zyngier case 0:
20299ed24f4bSMarc Zyngier vgic_present = true;
20309ed24f4bSMarc Zyngier break;
20319ed24f4bSMarc Zyngier case -ENODEV:
20329ed24f4bSMarc Zyngier case -ENXIO:
20339ed24f4bSMarc Zyngier vgic_present = false;
20349ed24f4bSMarc Zyngier err = 0;
20359ed24f4bSMarc Zyngier break;
20369ed24f4bSMarc Zyngier default:
20379ed24f4bSMarc Zyngier goto out;
20389ed24f4bSMarc Zyngier }
20399ed24f4bSMarc Zyngier
20409ed24f4bSMarc Zyngier /*
20419ed24f4bSMarc Zyngier * Init HYP architected timer support
20429ed24f4bSMarc Zyngier */
20439ed24f4bSMarc Zyngier err = kvm_timer_hyp_init(vgic_present);
20449ed24f4bSMarc Zyngier if (err)
20459ed24f4bSMarc Zyngier goto out;
20469ed24f4bSMarc Zyngier
204717ed14ebSSean Christopherson kvm_register_perf_callbacks(NULL);
204817ed14ebSSean Christopherson
20499ed24f4bSMarc Zyngier out:
205078b3bf48SSean Christopherson if (err)
205178b3bf48SSean Christopherson hyp_cpu_pm_exit();
205278b3bf48SSean Christopherson
2053fa8c3d65SDavid Brazdil if (err || !is_protected_kvm_enabled())
2054733c758eSOliver Upton on_each_cpu(cpu_hyp_uninit, NULL, 1);
20559ed24f4bSMarc Zyngier
20569ed24f4bSMarc Zyngier return err;
20579ed24f4bSMarc Zyngier }
20589ed24f4bSMarc Zyngier
teardown_subsystems(void)205953bf620aSSean Christopherson static void __init teardown_subsystems(void)
206078b3bf48SSean Christopherson {
206178b3bf48SSean Christopherson kvm_unregister_perf_callbacks();
206278b3bf48SSean Christopherson hyp_cpu_pm_exit();
206378b3bf48SSean Christopherson }
206478b3bf48SSean Christopherson
teardown_hyp_mode(void)206553bf620aSSean Christopherson static void __init teardown_hyp_mode(void)
20669ed24f4bSMarc Zyngier {
20679ed24f4bSMarc Zyngier int cpu;
20689ed24f4bSMarc Zyngier
20699ed24f4bSMarc Zyngier free_hyp_pgds();
207030c95391SDavid Brazdil for_each_possible_cpu(cpu) {
20719ed24f4bSMarc Zyngier free_page(per_cpu(kvm_arm_hyp_stack_page, cpu));
2072fe41a7f8SQuentin Perret free_pages(kvm_nvhe_sym(kvm_arm_hyp_percpu_base)[cpu], nvhe_percpu_order());
207330c95391SDavid Brazdil }
20749ed24f4bSMarc Zyngier }
20759ed24f4bSMarc Zyngier
do_pkvm_init(u32 hyp_va_bits)207653bf620aSSean Christopherson static int __init do_pkvm_init(u32 hyp_va_bits)
2077bfa79a80SQuentin Perret {
2078fe41a7f8SQuentin Perret void *per_cpu_base = kvm_ksym_ref(kvm_nvhe_sym(kvm_arm_hyp_percpu_base));
2079bfa79a80SQuentin Perret int ret;
2080bfa79a80SQuentin Perret
2081bfa79a80SQuentin Perret preempt_disable();
20828579a185SWill Deacon cpu_hyp_init_context();
2083bfa79a80SQuentin Perret ret = kvm_call_hyp_nvhe(__pkvm_init, hyp_mem_base, hyp_mem_size,
2084bfa79a80SQuentin Perret num_possible_cpus(), kern_hyp_va(per_cpu_base),
2085bfa79a80SQuentin Perret hyp_va_bits);
20868579a185SWill Deacon cpu_hyp_init_features();
20878579a185SWill Deacon
20888579a185SWill Deacon /*
20898579a185SWill Deacon * The stub hypercalls are now disabled, so set our local flag to
20908579a185SWill Deacon * prevent a later re-init attempt in kvm_arch_hardware_enable().
20918579a185SWill Deacon */
2092733c758eSOliver Upton __this_cpu_write(kvm_hyp_initialized, 1);
2093bfa79a80SQuentin Perret preempt_enable();
2094bfa79a80SQuentin Perret
2095bfa79a80SQuentin Perret return ret;
2096bfa79a80SQuentin Perret }
2097bfa79a80SQuentin Perret
get_hyp_id_aa64pfr0_el1(void)2098e8162521SFuad Tabba static u64 get_hyp_id_aa64pfr0_el1(void)
2099e8162521SFuad Tabba {
2100e8162521SFuad Tabba /*
2101e8162521SFuad Tabba * Track whether the system isn't affected by spectre/meltdown in the
2102e8162521SFuad Tabba * hypervisor's view of id_aa64pfr0_el1, used for protected VMs.
2103e8162521SFuad Tabba * Although this is per-CPU, we make it global for simplicity, e.g., not
2104e8162521SFuad Tabba * to have to worry about vcpu migration.
2105e8162521SFuad Tabba *
2106e8162521SFuad Tabba * Unlike for non-protected VMs, userspace cannot override this for
2107e8162521SFuad Tabba * protected VMs.
2108e8162521SFuad Tabba */
2109e8162521SFuad Tabba u64 val = read_sanitised_ftr_reg(SYS_ID_AA64PFR0_EL1);
2110e8162521SFuad Tabba
2111e8162521SFuad Tabba val &= ~(ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_CSV2) |
2112e8162521SFuad Tabba ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_CSV3));
2113e8162521SFuad Tabba
2114e8162521SFuad Tabba val |= FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_CSV2),
2115e8162521SFuad Tabba arm64_get_spectre_v2_state() == SPECTRE_UNAFFECTED);
2116e8162521SFuad Tabba val |= FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_CSV3),
2117e8162521SFuad Tabba arm64_get_meltdown_state() == SPECTRE_UNAFFECTED);
2118e8162521SFuad Tabba
2119e8162521SFuad Tabba return val;
2120e8162521SFuad Tabba }
2121e8162521SFuad Tabba
kvm_hyp_init_symbols(void)21226c165223SWill Deacon static void kvm_hyp_init_symbols(void)
2123bfa79a80SQuentin Perret {
2124e8162521SFuad Tabba kvm_nvhe_sym(id_aa64pfr0_el1_sys_val) = get_hyp_id_aa64pfr0_el1();
21256c30bfb1SFuad Tabba kvm_nvhe_sym(id_aa64pfr1_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64PFR1_EL1);
21266c30bfb1SFuad Tabba kvm_nvhe_sym(id_aa64isar0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64ISAR0_EL1);
21276c30bfb1SFuad Tabba kvm_nvhe_sym(id_aa64isar1_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64ISAR1_EL1);
2128def8c222SVladimir Murzin kvm_nvhe_sym(id_aa64isar2_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64ISAR2_EL1);
21297c419937SMarc Zyngier kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1);
21307c419937SMarc Zyngier kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1);
21316c30bfb1SFuad Tabba kvm_nvhe_sym(id_aa64mmfr2_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR2_EL1);
21328669651cSQuentin Perret kvm_nvhe_sym(id_aa64smfr0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64SMFR0_EL1);
213313e248aaSWill Deacon kvm_nvhe_sym(__icache_flags) = __icache_flags;
213473f38ef2SWill Deacon kvm_nvhe_sym(kvm_arm_vmid_bits) = kvm_arm_vmid_bits;
21356c165223SWill Deacon }
21366c165223SWill Deacon
kvm_hyp_init_protection(u32 hyp_va_bits)213753bf620aSSean Christopherson static int __init kvm_hyp_init_protection(u32 hyp_va_bits)
21386c165223SWill Deacon {
21396c165223SWill Deacon void *addr = phys_to_virt(hyp_mem_base);
21406c165223SWill Deacon int ret;
21417c419937SMarc Zyngier
2142bfa79a80SQuentin Perret ret = create_hyp_mappings(addr, addr + hyp_mem_size, PAGE_HYP);
2143bfa79a80SQuentin Perret if (ret)
2144bfa79a80SQuentin Perret return ret;
2145bfa79a80SQuentin Perret
2146bfa79a80SQuentin Perret ret = do_pkvm_init(hyp_va_bits);
2147bfa79a80SQuentin Perret if (ret)
2148bfa79a80SQuentin Perret return ret;
2149bfa79a80SQuentin Perret
2150bfa79a80SQuentin Perret free_hyp_pgds();
2151bfa79a80SQuentin Perret
2152bfa79a80SQuentin Perret return 0;
2153bfa79a80SQuentin Perret }
2154bfa79a80SQuentin Perret
pkvm_hyp_init_ptrauth(void)21558c15c2a0SMostafa Saleh static void pkvm_hyp_init_ptrauth(void)
21568c15c2a0SMostafa Saleh {
21578c15c2a0SMostafa Saleh struct kvm_cpu_context *hyp_ctxt;
21588c15c2a0SMostafa Saleh int cpu;
21598c15c2a0SMostafa Saleh
21608c15c2a0SMostafa Saleh for_each_possible_cpu(cpu) {
21618c15c2a0SMostafa Saleh hyp_ctxt = per_cpu_ptr_nvhe_sym(kvm_hyp_ctxt, cpu);
21628c15c2a0SMostafa Saleh hyp_ctxt->sys_regs[APIAKEYLO_EL1] = get_random_long();
21638c15c2a0SMostafa Saleh hyp_ctxt->sys_regs[APIAKEYHI_EL1] = get_random_long();
21648c15c2a0SMostafa Saleh hyp_ctxt->sys_regs[APIBKEYLO_EL1] = get_random_long();
21658c15c2a0SMostafa Saleh hyp_ctxt->sys_regs[APIBKEYHI_EL1] = get_random_long();
21668c15c2a0SMostafa Saleh hyp_ctxt->sys_regs[APDAKEYLO_EL1] = get_random_long();
21678c15c2a0SMostafa Saleh hyp_ctxt->sys_regs[APDAKEYHI_EL1] = get_random_long();
21688c15c2a0SMostafa Saleh hyp_ctxt->sys_regs[APDBKEYLO_EL1] = get_random_long();
21698c15c2a0SMostafa Saleh hyp_ctxt->sys_regs[APDBKEYHI_EL1] = get_random_long();
21708c15c2a0SMostafa Saleh hyp_ctxt->sys_regs[APGAKEYLO_EL1] = get_random_long();
21718c15c2a0SMostafa Saleh hyp_ctxt->sys_regs[APGAKEYHI_EL1] = get_random_long();
21728c15c2a0SMostafa Saleh }
21738c15c2a0SMostafa Saleh }
21748c15c2a0SMostafa Saleh
217567d953d4SMarc Zyngier /* Inits Hyp-mode on all online CPUs */
init_hyp_mode(void)217653bf620aSSean Christopherson static int __init init_hyp_mode(void)
21779ed24f4bSMarc Zyngier {
2178bfa79a80SQuentin Perret u32 hyp_va_bits;
21799ed24f4bSMarc Zyngier int cpu;
2180bfa79a80SQuentin Perret int err = -ENOMEM;
2181bfa79a80SQuentin Perret
2182bfa79a80SQuentin Perret /*
2183bfa79a80SQuentin Perret * The protected Hyp-mode cannot be initialized if the memory pool
2184bfa79a80SQuentin Perret * allocation has failed.
2185bfa79a80SQuentin Perret */
2186bfa79a80SQuentin Perret if (is_protected_kvm_enabled() && !hyp_mem_base)
2187bfa79a80SQuentin Perret goto out_err;
21889ed24f4bSMarc Zyngier
21899ed24f4bSMarc Zyngier /*
21909ed24f4bSMarc Zyngier * Allocate Hyp PGD and setup Hyp identity mapping
21919ed24f4bSMarc Zyngier */
2192bfa79a80SQuentin Perret err = kvm_mmu_init(&hyp_va_bits);
21939ed24f4bSMarc Zyngier if (err)
21949ed24f4bSMarc Zyngier goto out_err;
21959ed24f4bSMarc Zyngier
21969ed24f4bSMarc Zyngier /*
21979ed24f4bSMarc Zyngier * Allocate stack pages for Hypervisor-mode
21989ed24f4bSMarc Zyngier */
21999ed24f4bSMarc Zyngier for_each_possible_cpu(cpu) {
22009ed24f4bSMarc Zyngier unsigned long stack_page;
22019ed24f4bSMarc Zyngier
22029ed24f4bSMarc Zyngier stack_page = __get_free_page(GFP_KERNEL);
22039ed24f4bSMarc Zyngier if (!stack_page) {
22049ed24f4bSMarc Zyngier err = -ENOMEM;
22059ed24f4bSMarc Zyngier goto out_err;
22069ed24f4bSMarc Zyngier }
22079ed24f4bSMarc Zyngier
22089ed24f4bSMarc Zyngier per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page;
22099ed24f4bSMarc Zyngier }
22109ed24f4bSMarc Zyngier
22119ed24f4bSMarc Zyngier /*
221230c95391SDavid Brazdil * Allocate and initialize pages for Hypervisor-mode percpu regions.
221330c95391SDavid Brazdil */
221430c95391SDavid Brazdil for_each_possible_cpu(cpu) {
221530c95391SDavid Brazdil struct page *page;
221630c95391SDavid Brazdil void *page_addr;
221730c95391SDavid Brazdil
221830c95391SDavid Brazdil page = alloc_pages(GFP_KERNEL, nvhe_percpu_order());
221930c95391SDavid Brazdil if (!page) {
222030c95391SDavid Brazdil err = -ENOMEM;
222130c95391SDavid Brazdil goto out_err;
222230c95391SDavid Brazdil }
222330c95391SDavid Brazdil
222430c95391SDavid Brazdil page_addr = page_address(page);
222530c95391SDavid Brazdil memcpy(page_addr, CHOOSE_NVHE_SYM(__per_cpu_start), nvhe_percpu_size());
2226fe41a7f8SQuentin Perret kvm_nvhe_sym(kvm_arm_hyp_percpu_base)[cpu] = (unsigned long)page_addr;
222730c95391SDavid Brazdil }
222830c95391SDavid Brazdil
222930c95391SDavid Brazdil /*
22309ed24f4bSMarc Zyngier * Map the Hyp-code called directly from the host
22319ed24f4bSMarc Zyngier */
22329ed24f4bSMarc Zyngier err = create_hyp_mappings(kvm_ksym_ref(__hyp_text_start),
22339ed24f4bSMarc Zyngier kvm_ksym_ref(__hyp_text_end), PAGE_HYP_EXEC);
22349ed24f4bSMarc Zyngier if (err) {
22359ed24f4bSMarc Zyngier kvm_err("Cannot map world-switch code\n");
22369ed24f4bSMarc Zyngier goto out_err;
22379ed24f4bSMarc Zyngier }
22389ed24f4bSMarc Zyngier
223916174eeaSDavid Brazdil err = create_hyp_mappings(kvm_ksym_ref(__hyp_rodata_start),
224016174eeaSDavid Brazdil kvm_ksym_ref(__hyp_rodata_end), PAGE_HYP_RO);
22412d7bf218SDavid Brazdil if (err) {
224216174eeaSDavid Brazdil kvm_err("Cannot map .hyp.rodata section\n");
22432d7bf218SDavid Brazdil goto out_err;
22442d7bf218SDavid Brazdil }
22452d7bf218SDavid Brazdil
22469ed24f4bSMarc Zyngier err = create_hyp_mappings(kvm_ksym_ref(__start_rodata),
22479ed24f4bSMarc Zyngier kvm_ksym_ref(__end_rodata), PAGE_HYP_RO);
22489ed24f4bSMarc Zyngier if (err) {
22499ed24f4bSMarc Zyngier kvm_err("Cannot map rodata section\n");
22509ed24f4bSMarc Zyngier goto out_err;
22519ed24f4bSMarc Zyngier }
22529ed24f4bSMarc Zyngier
2253380e18adSQuentin Perret /*
2254380e18adSQuentin Perret * .hyp.bss is guaranteed to be placed at the beginning of the .bss
2255380e18adSQuentin Perret * section thanks to an assertion in the linker script. Map it RW and
2256380e18adSQuentin Perret * the rest of .bss RO.
2257380e18adSQuentin Perret */
2258380e18adSQuentin Perret err = create_hyp_mappings(kvm_ksym_ref(__hyp_bss_start),
2259380e18adSQuentin Perret kvm_ksym_ref(__hyp_bss_end), PAGE_HYP);
2260380e18adSQuentin Perret if (err) {
2261380e18adSQuentin Perret kvm_err("Cannot map hyp bss section: %d\n", err);
2262380e18adSQuentin Perret goto out_err;
2263380e18adSQuentin Perret }
2264380e18adSQuentin Perret
2265380e18adSQuentin Perret err = create_hyp_mappings(kvm_ksym_ref(__hyp_bss_end),
22669ed24f4bSMarc Zyngier kvm_ksym_ref(__bss_stop), PAGE_HYP_RO);
22679ed24f4bSMarc Zyngier if (err) {
22689ed24f4bSMarc Zyngier kvm_err("Cannot map bss section\n");
22699ed24f4bSMarc Zyngier goto out_err;
22709ed24f4bSMarc Zyngier }
22719ed24f4bSMarc Zyngier
22729ed24f4bSMarc Zyngier /*
22739ed24f4bSMarc Zyngier * Map the Hyp stack pages
22749ed24f4bSMarc Zyngier */
22759ed24f4bSMarc Zyngier for_each_possible_cpu(cpu) {
2276ce335431SKalesh Singh struct kvm_nvhe_init_params *params = per_cpu_ptr_nvhe_sym(kvm_init_params, cpu);
22779ed24f4bSMarc Zyngier char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu);
22789ed24f4bSMarc Zyngier
2279f156a7d1SVincent Donnefort err = create_hyp_stack(__pa(stack_page), ¶ms->stack_hyp_va);
22809ed24f4bSMarc Zyngier if (err) {
22819ed24f4bSMarc Zyngier kvm_err("Cannot map hyp stack\n");
22829ed24f4bSMarc Zyngier goto out_err;
22839ed24f4bSMarc Zyngier }
2284ce335431SKalesh Singh
2285ce335431SKalesh Singh /*
2286ce335431SKalesh Singh * Save the stack PA in nvhe_init_params. This will be needed
2287ce335431SKalesh Singh * to recreate the stack mapping in protected nVHE mode.
2288ce335431SKalesh Singh * __hyp_pa() won't do the right thing there, since the stack
2289ce335431SKalesh Singh * has been mapped in the flexible private VA space.
2290ce335431SKalesh Singh */
2291ce335431SKalesh Singh params->stack_pa = __pa(stack_page);
22929ed24f4bSMarc Zyngier }
22939ed24f4bSMarc Zyngier
22949ed24f4bSMarc Zyngier for_each_possible_cpu(cpu) {
2295fe41a7f8SQuentin Perret char *percpu_begin = (char *)kvm_nvhe_sym(kvm_arm_hyp_percpu_base)[cpu];
229630c95391SDavid Brazdil char *percpu_end = percpu_begin + nvhe_percpu_size();
22979ed24f4bSMarc Zyngier
22989cc77581SQuentin Perret /* Map Hyp percpu pages */
229930c95391SDavid Brazdil err = create_hyp_mappings(percpu_begin, percpu_end, PAGE_HYP);
23009ed24f4bSMarc Zyngier if (err) {
230130c95391SDavid Brazdil kvm_err("Cannot map hyp percpu region\n");
23026e3bfbb2SAndrew Scull goto out_err;
23036e3bfbb2SAndrew Scull }
23049cc77581SQuentin Perret
23059cc77581SQuentin Perret /* Prepare the CPU initialization parameters */
2306579d7ebeSRyan Roberts cpu_prepare_hyp_mode(cpu, hyp_va_bits);
23079ed24f4bSMarc Zyngier }
23089ed24f4bSMarc Zyngier
23096c165223SWill Deacon kvm_hyp_init_symbols();
23106c165223SWill Deacon
2311eeeee719SDavid Brazdil if (is_protected_kvm_enabled()) {
23128c15c2a0SMostafa Saleh if (IS_ENABLED(CONFIG_ARM64_PTR_AUTH_KERNEL) &&
23138c15c2a0SMostafa Saleh cpus_have_const_cap(ARM64_HAS_ADDRESS_AUTH))
23148c15c2a0SMostafa Saleh pkvm_hyp_init_ptrauth();
23158c15c2a0SMostafa Saleh
231694f5e8a4SDavid Brazdil init_cpu_logical_map();
231794f5e8a4SDavid Brazdil
231852b9e265SWang Wensheng if (!init_psci_relay()) {
231952b9e265SWang Wensheng err = -ENODEV;
2320eeeee719SDavid Brazdil goto out_err;
2321eeeee719SDavid Brazdil }
2322eeeee719SDavid Brazdil
2323bfa79a80SQuentin Perret err = kvm_hyp_init_protection(hyp_va_bits);
2324bfa79a80SQuentin Perret if (err) {
2325bfa79a80SQuentin Perret kvm_err("Failed to init hyp memory protection\n");
2326bfa79a80SQuentin Perret goto out_err;
2327bfa79a80SQuentin Perret }
2328bfa79a80SQuentin Perret }
23299ed24f4bSMarc Zyngier
23309ed24f4bSMarc Zyngier return 0;
23319ed24f4bSMarc Zyngier
23329ed24f4bSMarc Zyngier out_err:
23339ed24f4bSMarc Zyngier teardown_hyp_mode();
23349ed24f4bSMarc Zyngier kvm_err("error initializing Hyp mode: %d\n", err);
23359ed24f4bSMarc Zyngier return err;
23369ed24f4bSMarc Zyngier }
23379ed24f4bSMarc Zyngier
kvm_mpidr_to_vcpu(struct kvm * kvm,unsigned long mpidr)23389ed24f4bSMarc Zyngier struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr)
23399ed24f4bSMarc Zyngier {
23409ed24f4bSMarc Zyngier struct kvm_vcpu *vcpu;
234146808a4cSMarc Zyngier unsigned long i;
23429ed24f4bSMarc Zyngier
23439ed24f4bSMarc Zyngier mpidr &= MPIDR_HWID_BITMASK;
23449ed24f4bSMarc Zyngier kvm_for_each_vcpu(i, vcpu, kvm) {
23459ed24f4bSMarc Zyngier if (mpidr == kvm_vcpu_get_mpidr_aff(vcpu))
23469ed24f4bSMarc Zyngier return vcpu;
23479ed24f4bSMarc Zyngier }
23489ed24f4bSMarc Zyngier return NULL;
23499ed24f4bSMarc Zyngier }
23509ed24f4bSMarc Zyngier
kvm_arch_irqchip_in_kernel(struct kvm * kvm)2351d663b8a2SPaolo Bonzini bool kvm_arch_irqchip_in_kernel(struct kvm *kvm)
2352d663b8a2SPaolo Bonzini {
2353d663b8a2SPaolo Bonzini return irqchip_in_kernel(kvm);
2354d663b8a2SPaolo Bonzini }
2355d663b8a2SPaolo Bonzini
kvm_arch_has_irq_bypass(void)23569ed24f4bSMarc Zyngier bool kvm_arch_has_irq_bypass(void)
23579ed24f4bSMarc Zyngier {
23589ed24f4bSMarc Zyngier return true;
23599ed24f4bSMarc Zyngier }
23609ed24f4bSMarc Zyngier
kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer * cons,struct irq_bypass_producer * prod)23619ed24f4bSMarc Zyngier int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
23629ed24f4bSMarc Zyngier struct irq_bypass_producer *prod)
23639ed24f4bSMarc Zyngier {
23649ed24f4bSMarc Zyngier struct kvm_kernel_irqfd *irqfd =
23659ed24f4bSMarc Zyngier container_of(cons, struct kvm_kernel_irqfd, consumer);
23669ed24f4bSMarc Zyngier
23679ed24f4bSMarc Zyngier return kvm_vgic_v4_set_forwarding(irqfd->kvm, prod->irq,
23689ed24f4bSMarc Zyngier &irqfd->irq_entry);
23699ed24f4bSMarc Zyngier }
kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer * cons,struct irq_bypass_producer * prod)23709ed24f4bSMarc Zyngier void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
23719ed24f4bSMarc Zyngier struct irq_bypass_producer *prod)
23729ed24f4bSMarc Zyngier {
23739ed24f4bSMarc Zyngier struct kvm_kernel_irqfd *irqfd =
23749ed24f4bSMarc Zyngier container_of(cons, struct kvm_kernel_irqfd, consumer);
23759ed24f4bSMarc Zyngier
23769ed24f4bSMarc Zyngier kvm_vgic_v4_unset_forwarding(irqfd->kvm, prod->irq,
23779ed24f4bSMarc Zyngier &irqfd->irq_entry);
23789ed24f4bSMarc Zyngier }
23799ed24f4bSMarc Zyngier
kvm_arch_irq_bypass_stop(struct irq_bypass_consumer * cons)23809ed24f4bSMarc Zyngier void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *cons)
23819ed24f4bSMarc Zyngier {
23829ed24f4bSMarc Zyngier struct kvm_kernel_irqfd *irqfd =
23839ed24f4bSMarc Zyngier container_of(cons, struct kvm_kernel_irqfd, consumer);
23849ed24f4bSMarc Zyngier
23859ed24f4bSMarc Zyngier kvm_arm_halt_guest(irqfd->kvm);
23869ed24f4bSMarc Zyngier }
23879ed24f4bSMarc Zyngier
kvm_arch_irq_bypass_start(struct irq_bypass_consumer * cons)23889ed24f4bSMarc Zyngier void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *cons)
23899ed24f4bSMarc Zyngier {
23909ed24f4bSMarc Zyngier struct kvm_kernel_irqfd *irqfd =
23919ed24f4bSMarc Zyngier container_of(cons, struct kvm_kernel_irqfd, consumer);
23929ed24f4bSMarc Zyngier
23939ed24f4bSMarc Zyngier kvm_arm_resume_guest(irqfd->kvm);
23949ed24f4bSMarc Zyngier }
23959ed24f4bSMarc Zyngier
239667d953d4SMarc Zyngier /* Initialize Hyp-mode and memory mappings on all CPUs */
kvm_arm_init(void)239753bf620aSSean Christopherson static __init int kvm_arm_init(void)
23989ed24f4bSMarc Zyngier {
23999ed24f4bSMarc Zyngier int err;
24009ed24f4bSMarc Zyngier bool in_hyp_mode;
24019ed24f4bSMarc Zyngier
24029ed24f4bSMarc Zyngier if (!is_hyp_mode_available()) {
24039ed24f4bSMarc Zyngier kvm_info("HYP mode not available\n");
24049ed24f4bSMarc Zyngier return -ENODEV;
24059ed24f4bSMarc Zyngier }
24069ed24f4bSMarc Zyngier
2407b6a68b97SMarc Zyngier if (kvm_get_mode() == KVM_MODE_NONE) {
2408b6a68b97SMarc Zyngier kvm_info("KVM disabled from command line\n");
2409b6a68b97SMarc Zyngier return -ENODEV;
2410b6a68b97SMarc Zyngier }
2411b6a68b97SMarc Zyngier
2412f1f0c0cfSAlexandru Elisei err = kvm_sys_reg_table_init();
2413f1f0c0cfSAlexandru Elisei if (err) {
2414f1f0c0cfSAlexandru Elisei kvm_info("Error initializing system register tables");
2415f1f0c0cfSAlexandru Elisei return err;
2416f1f0c0cfSAlexandru Elisei }
2417f1f0c0cfSAlexandru Elisei
24189ed24f4bSMarc Zyngier in_hyp_mode = is_kernel_in_hyp_mode();
24199ed24f4bSMarc Zyngier
242096d389caSRob Herring if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) ||
242196d389caSRob Herring cpus_have_final_cap(ARM64_WORKAROUND_1508412))
2422abf532ccSRob Herring kvm_info("Guests without required CPU erratum workarounds can deadlock system!\n" \
2423abf532ccSRob Herring "Only trusted guests should be used on this system.\n");
2424abf532ccSRob Herring
2425bf249d9eSAnshuman Khandual err = kvm_set_ipa_limit();
24269ed24f4bSMarc Zyngier if (err)
24279ed24f4bSMarc Zyngier return err;
24289ed24f4bSMarc Zyngier
24299ed24f4bSMarc Zyngier err = kvm_arm_init_sve();
24309ed24f4bSMarc Zyngier if (err)
24319ed24f4bSMarc Zyngier return err;
24329ed24f4bSMarc Zyngier
24333248136bSJulien Grall err = kvm_arm_vmid_alloc_init();
24343248136bSJulien Grall if (err) {
24353248136bSJulien Grall kvm_err("Failed to initialize VMID allocator.\n");
24363248136bSJulien Grall return err;
24373248136bSJulien Grall }
24383248136bSJulien Grall
24399ed24f4bSMarc Zyngier if (!in_hyp_mode) {
24409ed24f4bSMarc Zyngier err = init_hyp_mode();
24419ed24f4bSMarc Zyngier if (err)
24429ed24f4bSMarc Zyngier goto out_err;
24439ed24f4bSMarc Zyngier }
24449ed24f4bSMarc Zyngier
2445b881cdceSWill Deacon err = kvm_init_vector_slots();
2446b881cdceSWill Deacon if (err) {
2447b881cdceSWill Deacon kvm_err("Cannot initialise vector slots\n");
24486baaeda8SSean Christopherson goto out_hyp;
2449b881cdceSWill Deacon }
2450b881cdceSWill Deacon
24519ed24f4bSMarc Zyngier err = init_subsystems();
24529ed24f4bSMarc Zyngier if (err)
245378b3bf48SSean Christopherson goto out_hyp;
24549ed24f4bSMarc Zyngier
2455f19f6644SDavid Brazdil if (is_protected_kvm_enabled()) {
24563eb681fbSDavid Brazdil kvm_info("Protected nVHE mode initialized successfully\n");
2457f19f6644SDavid Brazdil } else if (in_hyp_mode) {
24589ed24f4bSMarc Zyngier kvm_info("VHE mode initialized successfully\n");
2459f19f6644SDavid Brazdil } else {
24609ed24f4bSMarc Zyngier kvm_info("Hyp mode initialized successfully\n");
2461f19f6644SDavid Brazdil }
24629ed24f4bSMarc Zyngier
24631dc0f02dSSean Christopherson /*
24641dc0f02dSSean Christopherson * FIXME: Do something reasonable if kvm_init() fails after pKVM
24651dc0f02dSSean Christopherson * hypervisor protection is finalized.
24661dc0f02dSSean Christopherson */
246781a1cf9fSSean Christopherson err = kvm_init(sizeof(struct kvm_vcpu), 0, THIS_MODULE);
24681dc0f02dSSean Christopherson if (err)
24691dc0f02dSSean Christopherson goto out_subs;
24701dc0f02dSSean Christopherson
2471fa729bc7SSudeep Holla kvm_arm_initialised = true;
2472fa729bc7SSudeep Holla
24739ed24f4bSMarc Zyngier return 0;
24749ed24f4bSMarc Zyngier
24756baaeda8SSean Christopherson out_subs:
247678b3bf48SSean Christopherson teardown_subsystems();
24776baaeda8SSean Christopherson out_hyp:
24789ed24f4bSMarc Zyngier if (!in_hyp_mode)
24799ed24f4bSMarc Zyngier teardown_hyp_mode();
24809ed24f4bSMarc Zyngier out_err:
24813248136bSJulien Grall kvm_arm_vmid_alloc_free();
24829ed24f4bSMarc Zyngier return err;
24839ed24f4bSMarc Zyngier }
24849ed24f4bSMarc Zyngier
early_kvm_mode_cfg(char * arg)2485d8b369c4SDavid Brazdil static int __init early_kvm_mode_cfg(char *arg)
2486d8b369c4SDavid Brazdil {
2487d8b369c4SDavid Brazdil if (!arg)
2488d8b369c4SDavid Brazdil return -EINVAL;
2489d8b369c4SDavid Brazdil
2490b2a4d007SElliot Berman if (strcmp(arg, "none") == 0) {
2491b2a4d007SElliot Berman kvm_mode = KVM_MODE_NONE;
2492b2a4d007SElliot Berman return 0;
2493b2a4d007SElliot Berman }
2494b2a4d007SElliot Berman
2495b2a4d007SElliot Berman if (!is_hyp_mode_available()) {
2496b2a4d007SElliot Berman pr_warn_once("KVM is not available. Ignoring kvm-arm.mode\n");
2497b2a4d007SElliot Berman return 0;
2498b2a4d007SElliot Berman }
2499b2a4d007SElliot Berman
2500d8b369c4SDavid Brazdil if (strcmp(arg, "protected") == 0) {
2501cde5042aSWill Deacon if (!is_kernel_in_hyp_mode())
2502d8b369c4SDavid Brazdil kvm_mode = KVM_MODE_PROTECTED;
2503cde5042aSWill Deacon else
2504cde5042aSWill Deacon pr_warn_once("Protected KVM not available with VHE\n");
2505cde5042aSWill Deacon
2506d8b369c4SDavid Brazdil return 0;
2507d8b369c4SDavid Brazdil }
2508d8b369c4SDavid Brazdil
2509b6a68b97SMarc Zyngier if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode())) {
2510b6a68b97SMarc Zyngier kvm_mode = KVM_MODE_DEFAULT;
25111945a067SMarc Zyngier return 0;
2512b6a68b97SMarc Zyngier }
2513b6a68b97SMarc Zyngier
2514675cabc8SJintack Lim if (strcmp(arg, "nested") == 0 && !WARN_ON(!is_kernel_in_hyp_mode())) {
2515675cabc8SJintack Lim kvm_mode = KVM_MODE_NV;
2516675cabc8SJintack Lim return 0;
2517675cabc8SJintack Lim }
2518675cabc8SJintack Lim
2519d8b369c4SDavid Brazdil return -EINVAL;
2520d8b369c4SDavid Brazdil }
2521d8b369c4SDavid Brazdil early_param("kvm-arm.mode", early_kvm_mode_cfg);
2522d8b369c4SDavid Brazdil
kvm_get_mode(void)25233eb681fbSDavid Brazdil enum kvm_mode kvm_get_mode(void)
25243eb681fbSDavid Brazdil {
25253eb681fbSDavid Brazdil return kvm_mode;
25263eb681fbSDavid Brazdil }
25273eb681fbSDavid Brazdil
25281dc0f02dSSean Christopherson module_init(kvm_arm_init);
2529