^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2012 - Virtual Open Systems and Columbia University
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Author: Christoffer Dall <c.dall@virtualopensystems.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/bug.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/cpu_pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kvm_host.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/list.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/kmemleak.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/kvm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/kvm_irqfd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/irqbypass.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/sched/stat.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/psci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <trace/events/kvm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #define CREATE_TRACE_POINTS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include "trace_arm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <asm/ptrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <asm/mman.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <asm/tlbflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <asm/cpufeature.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <asm/virt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <asm/kvm_arm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <asm/kvm_asm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <asm/kvm_mmu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <asm/kvm_emulate.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <kvm/arm_hypercalls.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <kvm/arm_pmu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <kvm/arm_psci.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #ifdef REQUIRES_VIRT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) __asm__(".arch_extension virt");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static enum kvm_mode kvm_mode = KVM_MODE_DEFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) DEFINE_STATIC_KEY_FALSE(kvm_protected_mode_initialized);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) DECLARE_KVM_HYP_PER_CPU(unsigned long, kvm_hyp_vector);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) unsigned long kvm_arm_hyp_percpu_base[NR_CPUS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) DECLARE_KVM_NVHE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) /* The VMID used in the VTTBR */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static atomic64_t kvm_vmid_gen = ATOMIC64_INIT(1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) static u32 kvm_next_vmid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static DEFINE_SPINLOCK(kvm_vmid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static bool vgic_present;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static DEFINE_PER_CPU(unsigned char, kvm_arm_hardware_enabled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) DEFINE_STATIC_KEY_FALSE(userspace_irqchip_in_use);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) int kvm_arch_hardware_setup(void *opaque)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) int kvm_arch_check_processor_compat(void *opaque)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) struct kvm_enable_cap *cap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) if (cap->flags)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) switch (cap->cap) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) case KVM_CAP_ARM_NISV_TO_USER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) r = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) kvm->arch.return_nisv_io_abort_to_user = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) r = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static int kvm_arm_default_max_vcpus(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return vgic_present ? kvm_vgic_get_max_vcpus() : KVM_MAX_VCPUS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static void set_default_spectre(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) * The default is to expose CSV2 == 1 if the HW isn't affected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * Although this is a per-CPU feature, we make it global because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * asymmetric systems are just a nuisance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) * Userspace can override this as long as it doesn't promise
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) * the impossible.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) if (arm64_get_spectre_v2_state() == SPECTRE_UNAFFECTED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) kvm->arch.pfr0_csv2 = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) if (arm64_get_meltdown_state() == SPECTRE_UNAFFECTED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) kvm->arch.pfr0_csv3 = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * kvm_arch_init_vm - initializes a VM data structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * @kvm: pointer to the KVM struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) ret = kvm_arm_setup_stage2(kvm, type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) ret = kvm_init_stage2_mmu(kvm, &kvm->arch.mmu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) ret = create_hyp_mappings(kvm, kvm + 1, PAGE_HYP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) goto out_free_stage2_pgd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) kvm_vgic_early_init(kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) /* The maximum number of VCPUs is limited by the host's GIC model */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) kvm->arch.max_vcpus = kvm_arm_default_max_vcpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) set_default_spectre(kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) out_free_stage2_pgd:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) kvm_free_stage2_pgd(&kvm->arch.mmu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return VM_FAULT_SIGBUS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * kvm_arch_destroy_vm - destroy the VM data structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * @kvm: pointer to the KVM struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) void kvm_arch_destroy_vm(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) bitmap_free(kvm->arch.pmu_filter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) kvm_vgic_destroy(kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) for (i = 0; i < KVM_MAX_VCPUS; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (kvm->vcpus[i]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) kvm_vcpu_destroy(kvm->vcpus[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) kvm->vcpus[i] = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) atomic_set(&kvm->online_vcpus, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) int r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) switch (ext) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) case KVM_CAP_IRQCHIP:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) r = vgic_present;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) case KVM_CAP_IOEVENTFD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) case KVM_CAP_DEVICE_CTRL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) case KVM_CAP_USER_MEMORY:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) case KVM_CAP_SYNC_MMU:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) case KVM_CAP_ONE_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) case KVM_CAP_ARM_PSCI:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) case KVM_CAP_ARM_PSCI_0_2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) case KVM_CAP_READONLY_MEM:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) case KVM_CAP_MP_STATE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) case KVM_CAP_IMMEDIATE_EXIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) case KVM_CAP_VCPU_EVENTS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) case KVM_CAP_ARM_IRQ_LINE_LAYOUT_2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) case KVM_CAP_ARM_NISV_TO_USER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) case KVM_CAP_ARM_INJECT_EXT_DABT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) case KVM_CAP_SET_GUEST_DEBUG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) case KVM_CAP_VCPU_ATTRIBUTES:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) r = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) case KVM_CAP_ARM_SET_DEVICE_ADDR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) r = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) case KVM_CAP_NR_VCPUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) r = num_online_cpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) case KVM_CAP_MAX_VCPUS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) case KVM_CAP_MAX_VCPU_ID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) if (kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) r = kvm->arch.max_vcpus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) r = kvm_arm_default_max_vcpus();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) case KVM_CAP_MSI_DEVID:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if (!kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) r = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) r = kvm->arch.vgic.msis_require_devid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) case KVM_CAP_ARM_USER_IRQ:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * 1: EL1_VTIMER, EL1_PTIMER, and PMU.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * (bump this number if adding more devices)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) r = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) case KVM_CAP_STEAL_TIME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) r = kvm_arm_pvtime_supported();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) case KVM_CAP_ARM_EL1_32BIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) r = cpus_have_const_cap(ARM64_HAS_32BIT_EL1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) case KVM_CAP_GUEST_DEBUG_HW_BPS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) r = get_num_brps();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) case KVM_CAP_GUEST_DEBUG_HW_WPS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) r = get_num_wrps();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) case KVM_CAP_ARM_PMU_V3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) r = kvm_arm_support_pmu_v3();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) case KVM_CAP_ARM_INJECT_SERROR_ESR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) r = cpus_have_const_cap(ARM64_HAS_RAS_EXTN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) case KVM_CAP_ARM_VM_IPA_SIZE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) r = get_kvm_ipa_limit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) case KVM_CAP_ARM_SVE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) r = system_supports_sve();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) case KVM_CAP_ARM_PTRAUTH_ADDRESS:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) case KVM_CAP_ARM_PTRAUTH_GENERIC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) r = system_has_full_ptr_auth();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) r = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) long kvm_arch_dev_ioctl(struct file *filp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) unsigned int ioctl, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) struct kvm *kvm_arch_alloc_vm(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (!has_vhe())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) return kzalloc(sizeof(struct kvm), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) return vzalloc(sizeof(struct kvm));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) void kvm_arch_free_vm(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) if (!has_vhe())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) kfree(kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) vfree(kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (irqchip_in_kernel(kvm) && vgic_initialized(kvm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) if (id >= kvm->arch.max_vcpus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) /* Force users to call KVM_ARM_VCPU_INIT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) vcpu->arch.target = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) vcpu->arch.mmu_page_cache.gfp_zero = __GFP_ZERO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) /* Set up the timer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) kvm_timer_vcpu_init(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) kvm_pmu_vcpu_init(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) kvm_arm_reset_debug_ptr(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) kvm_arm_pvtime_vcpu_init(&vcpu->arch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) vcpu->arch.hw_mmu = &vcpu->kvm->arch.mmu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) err = kvm_vgic_vcpu_init(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) return create_hyp_mappings(vcpu, vcpu + 1, PAGE_HYP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) if (vcpu->arch.has_run_once && unlikely(!irqchip_in_kernel(vcpu->kvm)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) static_branch_dec(&userspace_irqchip_in_use);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) kvm_mmu_free_memory_cache(&vcpu->arch.mmu_page_cache);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) kvm_timer_vcpu_terminate(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) kvm_pmu_vcpu_destroy(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) kvm_arm_vcpu_destroy(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) return kvm_timer_is_pending(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) * If we're about to block (most likely because we've just hit a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) * WFI), we need to sync back the state of the GIC CPU interface
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) * so that we have the latest PMR and group enables. This ensures
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) * that kvm_arch_vcpu_runnable has up-to-date data to decide
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) * whether we have pending interrupts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) * For the same reason, we want to tell GICv4 that we need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) * doorbells to be signalled, should an interrupt become pending.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) kvm_vgic_vmcr_sync(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) vgic_v4_put(vcpu, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) vgic_v4_load(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) struct kvm_s2_mmu *mmu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) int *last_ran;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) mmu = vcpu->arch.hw_mmu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) last_ran = this_cpu_ptr(mmu->last_vcpu_ran);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) * We guarantee that both TLBs and I-cache are private to each
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) * vcpu. If detecting that a vcpu from the same VM has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) * previously run on the same physical CPU, call into the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) * hypervisor code to nuke the relevant contexts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) * We might get preempted before the vCPU actually runs, but
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) * over-invalidation doesn't affect correctness.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) if (*last_ran != vcpu->vcpu_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) kvm_call_hyp(__kvm_flush_cpu_context, mmu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) *last_ran = vcpu->vcpu_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) vcpu->cpu = cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) kvm_vgic_load(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) kvm_timer_vcpu_load(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) if (has_vhe())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) kvm_vcpu_load_sysregs_vhe(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) kvm_arch_vcpu_load_fp(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) kvm_vcpu_pmu_restore_guest(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) if (kvm_arm_is_pvtime_enabled(&vcpu->arch))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) kvm_make_request(KVM_REQ_RECORD_STEAL, vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) if (single_task_running())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) vcpu_clear_wfx_traps(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) vcpu_set_wfx_traps(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) if (vcpu_has_ptrauth(vcpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) vcpu_ptrauth_disable(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) kvm_arch_vcpu_load_debug_state_flags(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) kvm_arch_vcpu_put_debug_state_flags(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) kvm_arch_vcpu_put_fp(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) if (has_vhe())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) kvm_vcpu_put_sysregs_vhe(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) kvm_timer_vcpu_put(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) kvm_vgic_put(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) kvm_vcpu_pmu_restore_host(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) vcpu->cpu = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) static void vcpu_power_off(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) vcpu->arch.power_off = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) kvm_make_request(KVM_REQ_SLEEP, vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) kvm_vcpu_kick(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) struct kvm_mp_state *mp_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) if (vcpu->arch.power_off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) mp_state->mp_state = KVM_MP_STATE_STOPPED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) mp_state->mp_state = KVM_MP_STATE_RUNNABLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) struct kvm_mp_state *mp_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) switch (mp_state->mp_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) case KVM_MP_STATE_RUNNABLE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) vcpu->arch.power_off = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) case KVM_MP_STATE_STOPPED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) vcpu_power_off(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) * kvm_arch_vcpu_runnable - determine if the vcpu can be scheduled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) * @v: The VCPU pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) * If the guest CPU is not waiting for interrupts or an interrupt line is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) * asserted, the CPU is by definition runnable.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) bool irq_lines = *vcpu_hcr(v) & (HCR_VI | HCR_VF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) return ((irq_lines || kvm_vgic_vcpu_pending_irq(v))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) && !v->arch.power_off && !v->arch.pause);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) return vcpu_mode_priv(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) /* Just ensure a guest exit from a particular CPU */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) static void exit_vm_noop(void *info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) void force_vm_exit(const cpumask_t *mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) smp_call_function_many(mask, exit_vm_noop, NULL, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) * need_new_vmid_gen - check that the VMID is still valid
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) * @vmid: The VMID to check
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) * return true if there is a new generation of VMIDs being used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) * The hardware supports a limited set of values with the value zero reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) * for the host, so we check if an assigned value belongs to a previous
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) * generation, which requires us to assign a new value. If we're the first to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) * use a VMID for the new generation, we must flush necessary caches and TLBs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) * on all CPUs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) static bool need_new_vmid_gen(struct kvm_vmid *vmid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) u64 current_vmid_gen = atomic64_read(&kvm_vmid_gen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) smp_rmb(); /* Orders read of kvm_vmid_gen and kvm->arch.vmid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) return unlikely(READ_ONCE(vmid->vmid_gen) != current_vmid_gen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) * update_vmid - Update the vmid with a valid VMID for the current generation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) * @vmid: The stage-2 VMID information struct
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) static void update_vmid(struct kvm_vmid *vmid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) if (!need_new_vmid_gen(vmid))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) spin_lock(&kvm_vmid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) * We need to re-check the vmid_gen here to ensure that if another vcpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) * already allocated a valid vmid for this vm, then this vcpu should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) * use the same vmid.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) if (!need_new_vmid_gen(vmid)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) spin_unlock(&kvm_vmid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) /* First user of a new VMID generation? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) if (unlikely(kvm_next_vmid == 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) atomic64_inc(&kvm_vmid_gen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) kvm_next_vmid = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) * On SMP we know no other CPUs can use this CPU's or each
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) * other's VMID after force_vm_exit returns since the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) * kvm_vmid_lock blocks them from reentry to the guest.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) force_vm_exit(cpu_all_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) * Now broadcast TLB + ICACHE invalidation over the inner
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) * shareable domain to make sure all data structures are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) * clean.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) kvm_call_hyp(__kvm_flush_vm_context);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) vmid->vmid = kvm_next_vmid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) kvm_next_vmid++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) kvm_next_vmid &= (1 << kvm_get_vmid_bits()) - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) smp_wmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) WRITE_ONCE(vmid->vmid_gen, atomic64_read(&kvm_vmid_gen));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) spin_unlock(&kvm_vmid_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) struct kvm *kvm = vcpu->kvm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) if (likely(vcpu->arch.has_run_once))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) if (!kvm_arm_vcpu_is_finalized(vcpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) return -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) vcpu->arch.has_run_once = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) kvm_arm_vcpu_init_debug(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) if (likely(irqchip_in_kernel(kvm))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590) * Map the VGIC hardware resources before running a vcpu the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) * first time on this VM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) ret = kvm_vgic_map_resources(kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) * Tell the rest of the code that there are userspace irqchip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) * VMs in the wild.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) static_branch_inc(&userspace_irqchip_in_use);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604) ret = kvm_timer_enable(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) ret = kvm_arm_pmu_v3_enable(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) bool kvm_arch_intc_initialized(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) return vgic_initialized(kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) void kvm_arm_halt_guest(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) struct kvm_vcpu *vcpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) kvm_for_each_vcpu(i, vcpu, kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) vcpu->arch.pause = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) kvm_make_all_cpus_request(kvm, KVM_REQ_SLEEP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) void kvm_arm_resume_guest(struct kvm *kvm)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) struct kvm_vcpu *vcpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) kvm_for_each_vcpu(i, vcpu, kvm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) vcpu->arch.pause = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635) rcuwait_wake_up(kvm_arch_vcpu_get_wait(vcpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) static void vcpu_req_sleep(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) struct rcuwait *wait = kvm_arch_vcpu_get_wait(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) rcuwait_wait_event(wait,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) (!vcpu->arch.power_off) &&(!vcpu->arch.pause),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) TASK_INTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) if (vcpu->arch.power_off || vcpu->arch.pause) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) /* Awaken to handle a signal, request we sleep again later. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) kvm_make_request(KVM_REQ_SLEEP, vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) * Make sure we will observe a potential reset request if we've
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) * observed a change to the power state. Pairs with the smp_wmb() in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) * kvm_psci_vcpu_on().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) smp_rmb();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662) return vcpu->arch.target >= 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) static void check_vcpu_requests(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) if (kvm_request_pending(vcpu)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) if (kvm_check_request(KVM_REQ_SLEEP, vcpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669) vcpu_req_sleep(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) if (kvm_check_request(KVM_REQ_VCPU_RESET, vcpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) kvm_reset_vcpu(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) * Clear IRQ_PENDING requests that were made to guarantee
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) * that a VCPU sees new virtual interrupts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) kvm_check_request(KVM_REQ_IRQ_PENDING, vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) if (kvm_check_request(KVM_REQ_RECORD_STEAL, vcpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681) kvm_update_stolen_time(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) if (kvm_check_request(KVM_REQ_RELOAD_GICv4, vcpu)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684) /* The distributor enable bits were changed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) vgic_v4_put(vcpu, false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) vgic_v4_load(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) static bool vcpu_mode_is_bad_32bit(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) if (likely(!vcpu_mode_is_32bit(vcpu)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) return !system_supports_32bit_el0() ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699) static_branch_unlikely(&arm64_mismatched_32bit_el0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) * kvm_arch_vcpu_ioctl_run - the main VCPU run function to execute guest code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) * @vcpu: The VCPU pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) * This function is called through the VCPU_RUN ioctl called from user space. It
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) * will execute VM code in a loop until the time slice for the process is used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) * or some emulation is needed from user space in which case the function will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) * return with return value 0 and with the kvm_run structure filled in with the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710) * required data for the requested emulation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) struct kvm_run *run = vcpu->run;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) if (unlikely(!kvm_vcpu_initialized(vcpu)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 718) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 719)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 720) ret = kvm_vcpu_first_run_init(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 721) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 722) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 723)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 724) if (run->exit_reason == KVM_EXIT_MMIO) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 725) ret = kvm_handle_mmio_return(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 726) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 727) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 728) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 729)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 730) if (run->immediate_exit)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 731) return -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 732)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 733) vcpu_load(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 734)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 735) kvm_sigset_activate(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 737) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 738) run->exit_reason = KVM_EXIT_UNKNOWN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 739) while (ret > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 740) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 741) * Check conditions before entering the guest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 742) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 743) cond_resched();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 744)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 745) update_vmid(&vcpu->arch.hw_mmu->vmid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 747) check_vcpu_requests(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 748)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 749) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 750) * Preparing the interrupts to be injected also
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 751) * involves poking the GIC, which must be done in a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 752) * non-preemptible context.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 753) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 754) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 755)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 756) kvm_pmu_flush_hwstate(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 757)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 758) local_irq_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 759)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 760) kvm_vgic_flush_hwstate(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 761)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 762) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 763) * Exit if we have a signal pending so that we can deliver the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 764) * signal to user space.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 765) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 766) if (signal_pending(current)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 767) ret = -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 768) run->exit_reason = KVM_EXIT_INTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 769) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 770)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 771) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 772) * If we're using a userspace irqchip, then check if we need
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 773) * to tell a userspace irqchip about timer or PMU level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 774) * changes and if so, exit to userspace (the actual level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 775) * state gets updated in kvm_timer_update_run and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 776) * kvm_pmu_update_run below).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 777) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 778) if (static_branch_unlikely(&userspace_irqchip_in_use)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 779) if (kvm_timer_should_notify_user(vcpu) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 780) kvm_pmu_should_notify_user(vcpu)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 781) ret = -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 782) run->exit_reason = KVM_EXIT_INTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 783) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 784) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 785)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 786) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 787) * Ensure we set mode to IN_GUEST_MODE after we disable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 788) * interrupts and before the final VCPU requests check.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 789) * See the comment in kvm_vcpu_exiting_guest_mode() and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 790) * Documentation/virt/kvm/vcpu-requests.rst
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 791) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 792) smp_store_mb(vcpu->mode, IN_GUEST_MODE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 793)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 794) if (ret <= 0 || need_new_vmid_gen(&vcpu->arch.hw_mmu->vmid) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 795) kvm_request_pending(vcpu)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 796) vcpu->mode = OUTSIDE_GUEST_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 797) isb(); /* Ensure work in x_flush_hwstate is committed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 798) kvm_pmu_sync_hwstate(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 799) if (static_branch_unlikely(&userspace_irqchip_in_use))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 800) kvm_timer_sync_user(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 801) kvm_vgic_sync_hwstate(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 802) local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 803) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 804) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 805) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 806)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 807) kvm_arm_setup_debug(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 808)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 809) /**************************************************************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 810) * Enter the guest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 811) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 812) trace_kvm_entry(*vcpu_pc(vcpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 813) guest_enter_irqoff();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 814)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 815) ret = kvm_call_hyp_ret(__kvm_vcpu_run, vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 816)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 817) vcpu->mode = OUTSIDE_GUEST_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 818) vcpu->stat.exits++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 819) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 820) * Back from guest
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 821) *************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 822)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 823) kvm_arm_clear_debug(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 824)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 825) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 826) * We must sync the PMU state before the vgic state so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 827) * that the vgic can properly sample the updated state of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 828) * interrupt line.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 829) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 830) kvm_pmu_sync_hwstate(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 831)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 832) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 833) * Sync the vgic state before syncing the timer state because
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 834) * the timer code needs to know if the virtual timer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 835) * interrupts are active.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 836) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 837) kvm_vgic_sync_hwstate(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 838)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 839) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 840) * Sync the timer hardware state before enabling interrupts as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 841) * we don't want vtimer interrupts to race with syncing the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 842) * timer virtual interrupt state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 843) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 844) if (static_branch_unlikely(&userspace_irqchip_in_use))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 845) kvm_timer_sync_user(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 846)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 847) kvm_arch_vcpu_ctxsync_fp(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 848)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 849) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 850) * We may have taken a host interrupt in HYP mode (ie
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 851) * while executing the guest). This interrupt is still
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 852) * pending, as we haven't serviced it yet!
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 853) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 854) * We're now back in SVC mode, with interrupts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 855) * disabled. Enabling the interrupts now will have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 856) * the effect of taking the interrupt again, in SVC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 857) * mode this time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 858) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 859) local_irq_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 860)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 861) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 862) * We do local_irq_enable() before calling guest_exit() so
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 863) * that if a timer interrupt hits while running the guest we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 864) * account that tick as being spent in the guest. We enable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 865) * preemption after calling guest_exit() so that if we get
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 866) * preempted we make sure ticks after that is not counted as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 867) * guest time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 868) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 869) guest_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 870) trace_kvm_exit(ret, kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 871)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 872) /* Exit types that need handling before we can be preempted */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 873) handle_exit_early(vcpu, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 875) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 876)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 877) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 878) * The ARMv8 architecture doesn't give the hypervisor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 879) * a mechanism to prevent a guest from dropping to AArch32 EL0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 880) * if implemented by the CPU. If we spot the guest in such
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 881) * state and that we decided it wasn't supposed to do so (like
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 882) * with the asymmetric AArch32 case), return to userspace with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 883) * a fatal error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 884) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 885) if (vcpu_mode_is_bad_32bit(vcpu)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 886) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 887) * As we have caught the guest red-handed, decide that
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 888) * it isn't fit for purpose anymore by making the vcpu
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 889) * invalid. The VMM can try and fix it by issuing a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 890) * KVM_ARM_VCPU_INIT if it really wants to.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 891) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 892) vcpu->arch.target = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 893) ret = ARM_EXCEPTION_IL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 894) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 895)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 896) ret = handle_exit(vcpu, ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 897) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 899) /* Tell userspace about in-kernel device output levels */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 900) if (unlikely(!irqchip_in_kernel(vcpu->kvm))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 901) kvm_timer_update_run(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 902) kvm_pmu_update_run(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 903) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 905) kvm_sigset_deactivate(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 906)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 907) vcpu_put(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 908) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 909) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 910)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 911) static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 912) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 913) int bit_index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 914) bool set;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 915) unsigned long *hcr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 916)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 917) if (number == KVM_ARM_IRQ_CPU_IRQ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 918) bit_index = __ffs(HCR_VI);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 919) else /* KVM_ARM_IRQ_CPU_FIQ */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 920) bit_index = __ffs(HCR_VF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 921)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 922) hcr = vcpu_hcr(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 923) if (level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 924) set = test_and_set_bit(bit_index, hcr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 925) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 926) set = test_and_clear_bit(bit_index, hcr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 927)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 928) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 929) * If we didn't change anything, no need to wake up or kick other CPUs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 930) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 931) if (set == level)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 932) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 933)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 934) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 935) * The vcpu irq_lines field was updated, wake up sleeping VCPUs and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 936) * trigger a world-switch round on the running physical CPU to set the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 937) * virtual IRQ/FIQ fields in the HCR appropriately.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 938) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 939) kvm_make_request(KVM_REQ_IRQ_PENDING, vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 940) kvm_vcpu_kick(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 941)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 942) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 943) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 944)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 945) int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 946) bool line_status)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 947) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 948) u32 irq = irq_level->irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 949) unsigned int irq_type, vcpu_idx, irq_num;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 950) int nrcpus = atomic_read(&kvm->online_vcpus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 951) struct kvm_vcpu *vcpu = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 952) bool level = irq_level->level;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 954) irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 955) vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 956) vcpu_idx += ((irq >> KVM_ARM_IRQ_VCPU2_SHIFT) & KVM_ARM_IRQ_VCPU2_MASK) * (KVM_ARM_IRQ_VCPU_MASK + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 957) irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 958)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 959) trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 960)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 961) switch (irq_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 962) case KVM_ARM_IRQ_TYPE_CPU:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 963) if (irqchip_in_kernel(kvm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 964) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 965)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 966) if (vcpu_idx >= nrcpus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 967) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 968)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 969) vcpu = kvm_get_vcpu(kvm, vcpu_idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 970) if (!vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 971) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 972)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 973) if (irq_num > KVM_ARM_IRQ_CPU_FIQ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 974) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 975)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 976) return vcpu_interrupt_line(vcpu, irq_num, level);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 977) case KVM_ARM_IRQ_TYPE_PPI:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 978) if (!irqchip_in_kernel(kvm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 979) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 980)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 981) if (vcpu_idx >= nrcpus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 982) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 983)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 984) vcpu = kvm_get_vcpu(kvm, vcpu_idx);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 985) if (!vcpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 986) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 987)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 988) if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 989) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 990)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 991) return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 992) case KVM_ARM_IRQ_TYPE_SPI:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 993) if (!irqchip_in_kernel(kvm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 994) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 995)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 996) if (irq_num < VGIC_NR_PRIVATE_IRQS)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 997) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 998)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 999) return kvm_vgic_inject_irq(kvm, 0, irq_num, level, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1000) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1001)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1002) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1003) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1004)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1005) static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1006) const struct kvm_vcpu_init *init)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1007) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1008) unsigned int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1009) int phys_target = kvm_target_cpu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1010)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1011) if (init->target != phys_target)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1012) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1013)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1014) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1015) * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1016) * use the same target.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1017) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1018) if (vcpu->arch.target != -1 && vcpu->arch.target != init->target)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1019) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1020)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1021) /* -ENOENT for unknown features, -EINVAL for invalid combinations. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1022) for (i = 0; i < sizeof(init->features) * 8; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1023) bool set = (init->features[i / 32] & (1 << (i % 32)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1025) if (set && i >= KVM_VCPU_MAX_FEATURES)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1026) return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1027)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1028) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1029) * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1030) * use the same feature set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1031) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1032) if (vcpu->arch.target != -1 && i < KVM_VCPU_MAX_FEATURES &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1033) test_bit(i, vcpu->arch.features) != set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1034) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1035)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1036) if (set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1037) set_bit(i, vcpu->arch.features);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1038) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1039)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1040) vcpu->arch.target = phys_target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1041)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1042) /* Now we know what it is, we can reset it. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1043) ret = kvm_reset_vcpu(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1044) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1045) vcpu->arch.target = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1046) bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1047) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1048)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1049) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1050) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1051)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1052) static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1053) struct kvm_vcpu_init *init)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1054) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1055) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1056)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1057) ret = kvm_vcpu_set_target(vcpu, init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1058) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1059) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1060)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1061) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1062) * Ensure a rebooted VM will fault in RAM pages and detect if the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1063) * guest MMU is turned off and flush the caches as needed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1064) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1065) * S2FWB enforces all memory accesses to RAM being cacheable,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1066) * ensuring that the data side is always coherent. We still
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1067) * need to invalidate the I-cache though, as FWB does *not*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1068) * imply CTR_EL0.DIC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1069) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1070) if (vcpu->arch.has_run_once) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1071) if (!cpus_have_final_cap(ARM64_HAS_STAGE2_FWB))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1072) stage2_unmap_vm(vcpu->kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1073) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1074) __flush_icache_all();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1075) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1076)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1077) vcpu_reset_hcr(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1078)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1079) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1080) * Handle the "start in power-off" case.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1081) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1082) if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1083) vcpu_power_off(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1084) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1085) vcpu->arch.power_off = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1086)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1087) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1088) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1089)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1090) static int kvm_arm_vcpu_set_attr(struct kvm_vcpu *vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1091) struct kvm_device_attr *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1092) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1093) int ret = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1094)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1095) switch (attr->group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1096) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1097) ret = kvm_arm_vcpu_arch_set_attr(vcpu, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1098) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1099) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1101) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1104) static int kvm_arm_vcpu_get_attr(struct kvm_vcpu *vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1105) struct kvm_device_attr *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1107) int ret = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1109) switch (attr->group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1110) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1111) ret = kvm_arm_vcpu_arch_get_attr(vcpu, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1112) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1115) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1116) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1118) static int kvm_arm_vcpu_has_attr(struct kvm_vcpu *vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1119) struct kvm_device_attr *attr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1120) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1121) int ret = -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1123) switch (attr->group) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1124) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1125) ret = kvm_arm_vcpu_arch_has_attr(vcpu, attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1126) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1127) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1129) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1130) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1132) static int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1133) struct kvm_vcpu_events *events)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1134) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1135) memset(events, 0, sizeof(*events));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1137) return __kvm_arm_vcpu_get_events(vcpu, events);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1138) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1140) static int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1141) struct kvm_vcpu_events *events)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1143) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1145) /* check whether the reserved field is zero */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1146) for (i = 0; i < ARRAY_SIZE(events->reserved); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1147) if (events->reserved[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1148) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1150) /* check whether the pad field is zero */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1151) for (i = 0; i < ARRAY_SIZE(events->exception.pad); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1152) if (events->exception.pad[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1153) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1155) return __kvm_arm_vcpu_set_events(vcpu, events);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1158) long kvm_arch_vcpu_ioctl(struct file *filp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1159) unsigned int ioctl, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1160) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1161) struct kvm_vcpu *vcpu = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1162) void __user *argp = (void __user *)arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1163) struct kvm_device_attr attr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1164) long r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1166) switch (ioctl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1167) case KVM_ARM_VCPU_INIT: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1168) struct kvm_vcpu_init init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1169)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1170) r = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1171) if (copy_from_user(&init, argp, sizeof(init)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1172) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1174) r = kvm_arch_vcpu_ioctl_vcpu_init(vcpu, &init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1175) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1176) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1177) case KVM_SET_ONE_REG:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1178) case KVM_GET_ONE_REG: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1179) struct kvm_one_reg reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1181) r = -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1182) if (unlikely(!kvm_vcpu_initialized(vcpu)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1183) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1185) r = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1186) if (copy_from_user(®, argp, sizeof(reg)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1187) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1189) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1190) * We could owe a reset due to PSCI. Handle the pending reset
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1191) * here to ensure userspace register accesses are ordered after
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1192) * the reset.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1193) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1194) if (kvm_check_request(KVM_REQ_VCPU_RESET, vcpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1195) kvm_reset_vcpu(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1197) if (ioctl == KVM_SET_ONE_REG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1198) r = kvm_arm_set_reg(vcpu, ®);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1199) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1200) r = kvm_arm_get_reg(vcpu, ®);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1201) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1203) case KVM_GET_REG_LIST: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1204) struct kvm_reg_list __user *user_list = argp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1205) struct kvm_reg_list reg_list;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1206) unsigned n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1208) r = -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1209) if (unlikely(!kvm_vcpu_initialized(vcpu)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1210) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1212) r = -EPERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1213) if (!kvm_arm_vcpu_is_finalized(vcpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1214) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1216) r = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1217) if (copy_from_user(®_list, user_list, sizeof(reg_list)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1218) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1219) n = reg_list.n;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1220) reg_list.n = kvm_arm_num_regs(vcpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1221) if (copy_to_user(user_list, ®_list, sizeof(reg_list)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1222) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1223) r = -E2BIG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1224) if (n < reg_list.n)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1225) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1226) r = kvm_arm_copy_reg_indices(vcpu, user_list->reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1227) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1229) case KVM_SET_DEVICE_ATTR: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1230) r = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1231) if (copy_from_user(&attr, argp, sizeof(attr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1232) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1233) r = kvm_arm_vcpu_set_attr(vcpu, &attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1234) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1236) case KVM_GET_DEVICE_ATTR: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1237) r = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1238) if (copy_from_user(&attr, argp, sizeof(attr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1239) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1240) r = kvm_arm_vcpu_get_attr(vcpu, &attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1241) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1242) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1243) case KVM_HAS_DEVICE_ATTR: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1244) r = -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1245) if (copy_from_user(&attr, argp, sizeof(attr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1246) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1247) r = kvm_arm_vcpu_has_attr(vcpu, &attr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1248) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1250) case KVM_GET_VCPU_EVENTS: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1251) struct kvm_vcpu_events events;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1252)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1253) if (kvm_arm_vcpu_get_events(vcpu, &events))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1254) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1256) if (copy_to_user(argp, &events, sizeof(events)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1257) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1258)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1259) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1261) case KVM_SET_VCPU_EVENTS: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1262) struct kvm_vcpu_events events;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1263)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1264) if (copy_from_user(&events, argp, sizeof(events)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1265) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1266)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1267) return kvm_arm_vcpu_set_events(vcpu, &events);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1268) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1269) case KVM_ARM_VCPU_FINALIZE: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1270) int what;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1271)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1272) if (!kvm_vcpu_initialized(vcpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1273) return -ENOEXEC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1275) if (get_user(what, (const int __user *)argp))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1276) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1277)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1278) return kvm_arm_vcpu_finalize(vcpu, what);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1279) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1280) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1281) r = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1282) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1284) return r;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1285) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1287) void kvm_arch_sync_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1288) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1292) void kvm_arch_flush_remote_tlbs_memslot(struct kvm *kvm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1293) struct kvm_memory_slot *memslot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1294) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1295) kvm_flush_remote_tlbs(kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1298) static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1299) struct kvm_arm_device_addr *dev_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1300) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1301) unsigned long dev_id, type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1303) dev_id = (dev_addr->id & KVM_ARM_DEVICE_ID_MASK) >>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1304) KVM_ARM_DEVICE_ID_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1305) type = (dev_addr->id & KVM_ARM_DEVICE_TYPE_MASK) >>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1306) KVM_ARM_DEVICE_TYPE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1308) switch (dev_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1309) case KVM_ARM_DEVICE_VGIC_V2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1310) if (!vgic_present)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1311) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1312) return kvm_vgic_addr(kvm, type, &dev_addr->addr, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1313) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1314) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1318) long kvm_arch_vm_ioctl(struct file *filp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1319) unsigned int ioctl, unsigned long arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1320) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1321) struct kvm *kvm = filp->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1322) void __user *argp = (void __user *)arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1323)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1324) switch (ioctl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1325) case KVM_CREATE_IRQCHIP: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1326) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1327) if (!vgic_present)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1328) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1329) mutex_lock(&kvm->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1330) ret = kvm_vgic_create(kvm, KVM_DEV_TYPE_ARM_VGIC_V2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1331) mutex_unlock(&kvm->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1332) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1333) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1334) case KVM_ARM_SET_DEVICE_ADDR: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1335) struct kvm_arm_device_addr dev_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1336)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1337) if (copy_from_user(&dev_addr, argp, sizeof(dev_addr)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1338) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1339) return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1341) case KVM_ARM_PREFERRED_TARGET: {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1342) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1343) struct kvm_vcpu_init init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1344)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1345) err = kvm_vcpu_preferred_target(&init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1346) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1347) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1348)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1349) if (copy_to_user(argp, &init, sizeof(init)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1350) return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1351)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1352) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1353) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1354) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1355) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1359) static unsigned long nvhe_percpu_size(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1361) return (unsigned long)CHOOSE_NVHE_SYM(__per_cpu_end) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1362) (unsigned long)CHOOSE_NVHE_SYM(__per_cpu_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1363) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1364)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1365) static unsigned long nvhe_percpu_order(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1366) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1367) unsigned long size = nvhe_percpu_size();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1368)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1369) return size ? get_order(size) : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1372) /* A lookup table holding the hypervisor VA for each vector slot */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1373) static void *hyp_spectre_vector_selector[BP_HARDEN_EL2_SLOTS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1375) static void kvm_init_vector_slot(void *base, enum arm64_hyp_spectre_vector slot)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1376) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1377) hyp_spectre_vector_selector[slot] = __kvm_vector_slot2addr(base, slot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1380) static int kvm_init_vector_slots(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1381) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1382) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1383) void *base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1384)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1385) base = kern_hyp_va(kvm_ksym_ref(__kvm_hyp_vector));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1386) kvm_init_vector_slot(base, HYP_VECTOR_DIRECT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1387)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1388) base = kern_hyp_va(kvm_ksym_ref(__bp_harden_hyp_vecs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1389) kvm_init_vector_slot(base, HYP_VECTOR_SPECTRE_DIRECT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1391) if (kvm_system_needs_idmapped_vectors() && !has_vhe()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1392) err = create_hyp_exec_mappings(__pa_symbol(__bp_harden_hyp_vecs),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1393) __BP_HARDEN_HYP_VECS_SZ, &base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1394) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1395) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1396) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1397)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1398) kvm_init_vector_slot(base, HYP_VECTOR_INDIRECT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1399) kvm_init_vector_slot(base, HYP_VECTOR_SPECTRE_INDIRECT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1400) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1401) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1402)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1403) static void cpu_prepare_hyp_mode(int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1404) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1405) struct kvm_nvhe_init_params *params = per_cpu_ptr_nvhe_sym(kvm_init_params, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1406) unsigned long tcr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1408) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1409) * Calculate the raw per-cpu offset without a translation from the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1410) * kernel's mapping to the linear mapping, and store it in tpidr_el2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1411) * so that we can use adr_l to access per-cpu variables in EL2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1412) * Also drop the KASAN tag which gets in the way...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1413) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1414) params->tpidr_el2 = (unsigned long)kasan_reset_tag(per_cpu_ptr_nvhe_sym(__per_cpu_start, cpu)) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1415) (unsigned long)kvm_ksym_ref(CHOOSE_NVHE_SYM(__per_cpu_start));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1417) params->mair_el2 = read_sysreg(mair_el1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1419) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1420) * The ID map may be configured to use an extended virtual address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1421) * range. This is only the case if system RAM is out of range for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1422) * currently configured page size and VA_BITS, in which case we will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1423) * also need the extended virtual range for the HYP ID map, or we won't
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1424) * be able to enable the EL2 MMU.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1425) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1426) * However, at EL2, there is only one TTBR register, and we can't switch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1427) * between translation tables *and* update TCR_EL2.T0SZ at the same
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1428) * time. Bottom line: we need to use the extended range with *both* our
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1429) * translation tables.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1430) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1431) * So use the same T0SZ value we use for the ID map.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1432) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1433) tcr = (read_sysreg(tcr_el1) & TCR_EL2_MASK) | TCR_EL2_RES1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1434) tcr &= ~TCR_T0SZ_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1435) tcr |= (idmap_t0sz & GENMASK(TCR_TxSZ_WIDTH - 1, 0)) << TCR_T0SZ_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1436) params->tcr_el2 = tcr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1438) params->stack_hyp_va = kern_hyp_va(per_cpu(kvm_arm_hyp_stack_page, cpu) + PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1439) params->pgd_pa = kvm_mmu_get_httbr();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1440) if (is_protected_kvm_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1441) params->hcr_el2 = HCR_HOST_NVHE_PROTECTED_FLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1442) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1443) params->hcr_el2 = HCR_HOST_NVHE_FLAGS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1444) params->vttbr = params->vtcr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1446) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1447) * Flush the init params from the data cache because the struct will
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1448) * be read while the MMU is off.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1449) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1450) kvm_flush_dcache_to_poc(params, sizeof(*params));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1451) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1452)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1453) static void hyp_install_host_vector(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1454) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1455) struct kvm_nvhe_init_params *params;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1456) struct arm_smccc_res res;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1458) /* Switch from the HYP stub to our own HYP init vector */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1459) __hyp_set_vectors(kvm_get_idmap_vector());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1461) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1462) * Call initialization code, and switch to the full blown HYP code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1463) * If the cpucaps haven't been finalized yet, something has gone very
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1464) * wrong, and hyp will crash and burn when it uses any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1465) * cpus_have_const_cap() wrapper.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1466) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1467) BUG_ON(!system_capabilities_finalized());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1468) params = this_cpu_ptr_nvhe_sym(kvm_init_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1469) arm_smccc_1_1_hvc(KVM_HOST_SMCCC_FUNC(__kvm_hyp_init), virt_to_phys(params), &res);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1470) WARN_ON(res.a0 != SMCCC_RET_SUCCESS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1471) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1472)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1473) static void cpu_init_hyp_mode(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1474) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1475) hyp_install_host_vector();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1477) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1478) * Disabling SSBD on a non-VHE system requires us to enable SSBS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1479) * at EL2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1480) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1481) if (this_cpu_has_cap(ARM64_SSBS) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1482) arm64_get_spectre_v4_state() == SPECTRE_VULNERABLE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1483) kvm_call_hyp_nvhe(__kvm_enable_ssbs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1484) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1485) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1486)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1487) static void cpu_hyp_reset(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1488) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1489) if (!is_kernel_in_hyp_mode())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1490) __hyp_reset_vectors();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1491) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1493) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1494) * EL2 vectors can be mapped and rerouted in a number of ways,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1495) * depending on the kernel configuration and CPU present:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1496) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1497) * - If the CPU is affected by Spectre-v2, the hardening sequence is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1498) * placed in one of the vector slots, which is executed before jumping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1499) * to the real vectors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1500) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1501) * - If the CPU also has the ARM64_SPECTRE_V3A cap, the slot
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1502) * containing the hardening sequence is mapped next to the idmap page,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1503) * and executed before jumping to the real vectors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1504) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1505) * - If the CPU only has the ARM64_SPECTRE_V3A cap, then an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1506) * empty slot is selected, mapped next to the idmap page, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1507) * executed before jumping to the real vectors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1508) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1509) * Note that ARM64_SPECTRE_V3A is somewhat incompatible with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1510) * VHE, as we don't have hypervisor-specific mappings. If the system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1511) * is VHE and yet selects this capability, it will be ignored.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1512) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1513) static void cpu_set_hyp_vector(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1514) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1515) struct bp_hardening_data *data = this_cpu_ptr(&bp_hardening_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1516) void *vector = hyp_spectre_vector_selector[data->slot];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1518) if (!is_protected_kvm_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1519) *this_cpu_ptr_hyp_sym(kvm_hyp_vector) = (unsigned long)vector;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1520) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1521) kvm_call_hyp_nvhe(__pkvm_cpu_set_vector, data->slot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1522) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1524) static void cpu_hyp_reinit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1525) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1526) kvm_init_host_cpu_context(&this_cpu_ptr_hyp_sym(kvm_host_data)->host_ctxt);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1528) cpu_hyp_reset();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1529)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1530) if (is_kernel_in_hyp_mode())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1531) kvm_timer_init_vhe();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1532) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1533) cpu_init_hyp_mode();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1534)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1535) cpu_set_hyp_vector();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1537) kvm_arm_init_debug();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1538)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1539) if (vgic_present)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1540) kvm_vgic_init_cpu_hardware();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1541) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1542)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1543) static void _kvm_arch_hardware_enable(void *discard)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1544) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1545) if (!__this_cpu_read(kvm_arm_hardware_enabled)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1546) cpu_hyp_reinit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1547) __this_cpu_write(kvm_arm_hardware_enabled, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1548) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1549) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1551) int kvm_arch_hardware_enable(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1552) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1553) _kvm_arch_hardware_enable(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1554) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1555) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1556)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1557) static void _kvm_arch_hardware_disable(void *discard)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1558) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1559) if (__this_cpu_read(kvm_arm_hardware_enabled)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1560) cpu_hyp_reset();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1561) __this_cpu_write(kvm_arm_hardware_enabled, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1562) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1563) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1565) void kvm_arch_hardware_disable(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1566) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1567) if (!is_protected_kvm_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1568) _kvm_arch_hardware_disable(NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1569) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1570)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1571) #ifdef CONFIG_CPU_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1572) static int hyp_init_cpu_pm_notifier(struct notifier_block *self,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1573) unsigned long cmd,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1574) void *v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1575) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1576) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1577) * kvm_arm_hardware_enabled is left with its old value over
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1578) * PM_ENTER->PM_EXIT. It is used to indicate PM_EXIT should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1579) * re-enable hyp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1580) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1581) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1582) case CPU_PM_ENTER:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1583) if (__this_cpu_read(kvm_arm_hardware_enabled))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1584) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1585) * don't update kvm_arm_hardware_enabled here
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1586) * so that the hardware will be re-enabled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1587) * when we resume. See below.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1588) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1589) cpu_hyp_reset();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1591) return NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1592) case CPU_PM_ENTER_FAILED:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1593) case CPU_PM_EXIT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1594) if (__this_cpu_read(kvm_arm_hardware_enabled))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1595) /* The hardware was enabled before suspend. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1596) cpu_hyp_reinit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1598) return NOTIFY_OK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1599)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1600) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1601) return NOTIFY_DONE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1602) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1603) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1605) static struct notifier_block hyp_init_cpu_pm_nb = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1606) .notifier_call = hyp_init_cpu_pm_notifier,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1607) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1608)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1609) static void hyp_cpu_pm_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1610) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1611) if (!is_protected_kvm_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1612) cpu_pm_register_notifier(&hyp_init_cpu_pm_nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1613) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1614) static void hyp_cpu_pm_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1615) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1616) if (!is_protected_kvm_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1617) cpu_pm_unregister_notifier(&hyp_init_cpu_pm_nb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1618) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1619) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1620) static inline void hyp_cpu_pm_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1621) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1622) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1623) static inline void hyp_cpu_pm_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1624) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1625) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1626) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1628) static void init_cpu_logical_map(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1629) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1630) unsigned int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1631)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1632) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1633) * Copy the MPIDR <-> logical CPU ID mapping to hyp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1634) * Only copy the set of online CPUs whose features have been chacked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1635) * against the finalized system capabilities. The hypervisor will not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1636) * allow any other CPUs from the `possible` set to boot.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1637) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1638) for_each_online_cpu(cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1639) hyp_cpu_logical_map[cpu] = cpu_logical_map(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1640) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1641)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1642) #define init_psci_0_1_impl_state(config, what) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1643) config.psci_0_1_ ## what ## _implemented = psci_ops.what
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1644)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1645) static bool init_psci_relay(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1646) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1647) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1648) * If PSCI has not been initialized, protected KVM cannot install
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1649) * itself on newly booted CPUs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1650) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1651) if (!psci_ops.get_version) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1652) kvm_err("Cannot initialize protected mode without PSCI\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1653) return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1654) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1655)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1656) kvm_host_psci_config.version = psci_ops.get_version();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1657)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1658) if (kvm_host_psci_config.version == PSCI_VERSION(0, 1)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1659) kvm_host_psci_config.function_ids_0_1 = get_psci_0_1_function_ids();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1660) init_psci_0_1_impl_state(kvm_host_psci_config, cpu_suspend);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1661) init_psci_0_1_impl_state(kvm_host_psci_config, cpu_on);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1662) init_psci_0_1_impl_state(kvm_host_psci_config, cpu_off);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1663) init_psci_0_1_impl_state(kvm_host_psci_config, migrate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1664) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1665) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1666) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1667)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1668) static int init_common_resources(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1669) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1670) return kvm_set_ipa_limit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1671) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1672)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1673) static int init_subsystems(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1674) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1675) int err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1676)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1677) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1678) * Enable hardware so that subsystem initialisation can access EL2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1679) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1680) on_each_cpu(_kvm_arch_hardware_enable, NULL, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1682) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1683) * Register CPU lower-power notifier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1684) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1685) hyp_cpu_pm_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1686)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1687) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1688) * Init HYP view of VGIC
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1689) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1690) err = kvm_vgic_hyp_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1691) switch (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1692) case 0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1693) vgic_present = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1694) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1695) case -ENODEV:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1696) case -ENXIO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1697) vgic_present = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1698) err = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1699) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1700) default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1701) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1702) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1703)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1704) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1705) * Init HYP architected timer support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1706) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1707) err = kvm_timer_hyp_init(vgic_present);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1708) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1709) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1711) kvm_perf_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1712) kvm_sys_reg_table_init();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1714) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1715) if (err || !is_protected_kvm_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1716) on_each_cpu(_kvm_arch_hardware_disable, NULL, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1717)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1718) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1719) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1720)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1721) static void teardown_hyp_mode(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1722) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1723) int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1724)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1725) free_hyp_pgds();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1726) for_each_possible_cpu(cpu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1727) free_page(per_cpu(kvm_arm_hyp_stack_page, cpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1728) free_pages(kvm_arm_hyp_percpu_base[cpu], nvhe_percpu_order());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1729) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1730) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1731)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1732) static int do_pkvm_init(u32 hyp_va_bits)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1733) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1734) void *per_cpu_base = kvm_ksym_ref(kvm_arm_hyp_percpu_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1735) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1736)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1737) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1738) hyp_install_host_vector();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1739) ret = kvm_call_hyp_nvhe(__pkvm_init, hyp_mem_base, hyp_mem_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1740) num_possible_cpus(), kern_hyp_va(per_cpu_base),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1741) hyp_va_bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1742) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1743)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1744) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1745) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1746)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1747) static int kvm_hyp_init_protection(u32 hyp_va_bits)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1748) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1749) void *addr = phys_to_virt(hyp_mem_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1750) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1751)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1752) kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1753) kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val) = read_sanitised_ftr_reg(SYS_ID_AA64MMFR1_EL1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1754)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1755) ret = create_hyp_mappings(addr, addr + hyp_mem_size, PAGE_HYP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1756) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1757) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1758)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1759) ret = do_pkvm_init(hyp_va_bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1760) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1761) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1762)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1763) free_hyp_pgds();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1764)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1765) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1766) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1767)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1768) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1769) * Inits Hyp-mode on all online CPUs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1770) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1771) static int init_hyp_mode(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1772) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1773) u32 hyp_va_bits;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1774) int cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1775) int err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1776)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1777) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1778) * The protected Hyp-mode cannot be initialized if the memory pool
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1779) * allocation has failed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1780) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1781) if (is_protected_kvm_enabled() && !hyp_mem_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1782) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1783)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1784) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1785) * Allocate Hyp PGD and setup Hyp identity mapping
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1786) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1787) err = kvm_mmu_init(&hyp_va_bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1788) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1789) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1790)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1791) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1792) * Allocate stack pages for Hypervisor-mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1793) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1794) for_each_possible_cpu(cpu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1795) unsigned long stack_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1796)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1797) stack_page = __get_free_page(GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1798) if (!stack_page) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1799) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1800) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1801) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1802)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1803) per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1804) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1805)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1806) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1807) * Allocate and initialize pages for Hypervisor-mode percpu regions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1808) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1809) for_each_possible_cpu(cpu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1810) struct page *page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1811) void *page_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1812)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1813) page = alloc_pages(GFP_KERNEL, nvhe_percpu_order());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1814) if (!page) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1815) err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1816) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1817) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1818)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1819) page_addr = page_address(page);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1820) memcpy(page_addr, CHOOSE_NVHE_SYM(__per_cpu_start), nvhe_percpu_size());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1821) kvm_arm_hyp_percpu_base[cpu] = (unsigned long)page_addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1822) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1823)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1824) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1825) * Map the Hyp-code called directly from the host
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1826) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1827) err = create_hyp_mappings(kvm_ksym_ref(__hyp_text_start),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1828) kvm_ksym_ref(__hyp_text_end), PAGE_HYP_EXEC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1829) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1830) kvm_err("Cannot map world-switch code\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1831) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1832) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1833)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1834) err = create_hyp_mappings(kvm_ksym_ref(__hyp_rodata_start),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1835) kvm_ksym_ref(__hyp_rodata_end), PAGE_HYP_RO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1836) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1837) kvm_err("Cannot map .hyp.rodata section\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1838) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1839) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1840)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1841) err = create_hyp_mappings(kvm_ksym_ref(__start_rodata),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1842) kvm_ksym_ref(__end_rodata), PAGE_HYP_RO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1843) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1844) kvm_err("Cannot map rodata section\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1845) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1846) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1847)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1848) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1849) * .hyp.bss is guaranteed to be placed at the beginning of the .bss
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1850) * section thanks to an assertion in the linker script. Map it RW and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1851) * the rest of .bss RO.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1852) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1853) err = create_hyp_mappings(kvm_ksym_ref(__hyp_bss_start),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1854) kvm_ksym_ref(__hyp_bss_end), PAGE_HYP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1855) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1856) kvm_err("Cannot map hyp bss section: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1857) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1858) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1859)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1860) err = create_hyp_mappings(kvm_ksym_ref(__hyp_bss_end),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1861) kvm_ksym_ref(__bss_stop), PAGE_HYP_RO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1862) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1863) kvm_err("Cannot map bss section\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1864) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1865) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1866)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1867) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1868) * Map the Hyp stack pages
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1869) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1870) for_each_possible_cpu(cpu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1871) char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1872) err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1873) PAGE_HYP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1874)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1875) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1876) kvm_err("Cannot map hyp stack\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1877) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1878) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1879) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1880)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1881) for_each_possible_cpu(cpu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1882) char *percpu_begin = (char *)kvm_arm_hyp_percpu_base[cpu];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1883) char *percpu_end = percpu_begin + nvhe_percpu_size();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1884)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1885) /* Map Hyp percpu pages */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1886) err = create_hyp_mappings(percpu_begin, percpu_end, PAGE_HYP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1887) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1888) kvm_err("Cannot map hyp percpu region\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1889) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1890) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1891)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1892) /* Prepare the CPU initialization parameters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1893) cpu_prepare_hyp_mode(cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1894) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1895)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1896) if (is_protected_kvm_enabled()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1897) init_cpu_logical_map();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1898)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1899) if (!init_psci_relay()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1900) err = -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1901) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1902) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1903) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1904)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1905) if (is_protected_kvm_enabled()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1906) err = kvm_hyp_init_protection(hyp_va_bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1907) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1908) kvm_err("Failed to init hyp memory protection\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1909) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1910) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1911) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1912)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1913) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1914)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1915) out_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1916) teardown_hyp_mode();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1917) kvm_err("error initializing Hyp mode: %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1918) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1919) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1920)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1921) void _kvm_host_prot_finalize(void *discard)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1922) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1923) WARN_ON(kvm_call_hyp_nvhe(__pkvm_prot_finalize));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1924) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1925)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1926) static inline int pkvm_mark_hyp(phys_addr_t start, phys_addr_t end)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1927) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1928) return kvm_call_hyp_nvhe(__pkvm_mark_hyp, start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1929) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1930)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1931) #define pkvm_mark_hyp_section(__section) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1932) pkvm_mark_hyp(__pa_symbol(__section##_start), \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1933) __pa_symbol(__section##_end))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1934)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1935) static int finalize_hyp_mode(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1936) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1937) int cpu, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1938)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1939) if (!is_protected_kvm_enabled())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1940) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1941)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1942) ret = pkvm_mark_hyp_section(__hyp_idmap_text);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1943) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1944) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1945)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1946) ret = pkvm_mark_hyp_section(__hyp_text);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1947) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1948) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1949)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1950) ret = pkvm_mark_hyp_section(__hyp_rodata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1951) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1952) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1953)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1954) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1955) * Exclude HYP BSS from kmemleak so that it doesn't get peeked
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1956) * at, which would end badly once the section is inaccessible.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1957) * None of other sections should ever be introspected.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1958) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1959) kmemleak_free_part(__hyp_bss_start, __hyp_bss_end - __hyp_bss_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1960) ret = pkvm_mark_hyp_section(__hyp_bss);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1961) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1962) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1963)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1964) ret = pkvm_mark_hyp(hyp_mem_base, hyp_mem_base + hyp_mem_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1965) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1966) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1967)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1968) for_each_possible_cpu(cpu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1969) phys_addr_t start = virt_to_phys((void *)kvm_arm_hyp_percpu_base[cpu]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1970) phys_addr_t end = start + (PAGE_SIZE << nvhe_percpu_order());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1971)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1972) ret = pkvm_mark_hyp(start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1973) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1974) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1975)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1976) start = virt_to_phys((void *)per_cpu(kvm_arm_hyp_stack_page, cpu));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1977) end = start + PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1978) ret = pkvm_mark_hyp(start, end);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1979) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1980) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1981) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1982)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1983) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1984) * Flip the static key upfront as that may no longer be possible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1985) * once the host stage 2 is installed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1986) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1987) static_branch_enable(&kvm_protected_mode_initialized);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1988) on_each_cpu(_kvm_host_prot_finalize, NULL, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1989)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1990) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1991) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1992)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1993) static void check_kvm_target_cpu(void *ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1994) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1995) *(int *)ret = kvm_target_cpu();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1996) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1997)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1998) struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1999) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2000) struct kvm_vcpu *vcpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2001) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2002)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2003) mpidr &= MPIDR_HWID_BITMASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2004) kvm_for_each_vcpu(i, vcpu, kvm) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2005) if (mpidr == kvm_vcpu_get_mpidr_aff(vcpu))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2006) return vcpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2007) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2008) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2009) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2010)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2011) bool kvm_arch_has_irq_bypass(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2012) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2013) return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2014) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2015)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2016) int kvm_arch_irq_bypass_add_producer(struct irq_bypass_consumer *cons,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2017) struct irq_bypass_producer *prod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2018) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2019) struct kvm_kernel_irqfd *irqfd =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2020) container_of(cons, struct kvm_kernel_irqfd, consumer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2021)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2022) return kvm_vgic_v4_set_forwarding(irqfd->kvm, prod->irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2023) &irqfd->irq_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2024) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2025) void kvm_arch_irq_bypass_del_producer(struct irq_bypass_consumer *cons,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2026) struct irq_bypass_producer *prod)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2027) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2028) struct kvm_kernel_irqfd *irqfd =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2029) container_of(cons, struct kvm_kernel_irqfd, consumer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2030)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2031) kvm_vgic_v4_unset_forwarding(irqfd->kvm, prod->irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2032) &irqfd->irq_entry);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2033) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2034)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2035) void kvm_arch_irq_bypass_stop(struct irq_bypass_consumer *cons)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2036) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2037) struct kvm_kernel_irqfd *irqfd =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2038) container_of(cons, struct kvm_kernel_irqfd, consumer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2039)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2040) kvm_arm_halt_guest(irqfd->kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2041) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2042)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2043) void kvm_arch_irq_bypass_start(struct irq_bypass_consumer *cons)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2044) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2045) struct kvm_kernel_irqfd *irqfd =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2046) container_of(cons, struct kvm_kernel_irqfd, consumer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2047)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2048) kvm_arm_resume_guest(irqfd->kvm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2049) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2050)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2051) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2052) * Initialize Hyp-mode and memory mappings on all CPUs.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2053) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2054) int kvm_arch_init(void *opaque)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2055) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2056) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2057) int ret, cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2058) bool in_hyp_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2059)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2060) if (!is_hyp_mode_available()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2061) kvm_info("HYP mode not available\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2062) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2063) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2064)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2065) in_hyp_mode = is_kernel_in_hyp_mode();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2066)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2067) if (cpus_have_final_cap(ARM64_WORKAROUND_DEVICE_LOAD_ACQUIRE) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2068) cpus_have_final_cap(ARM64_WORKAROUND_1508412))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2069) kvm_info("Guests without required CPU erratum workarounds can deadlock system!\n" \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2070) "Only trusted guests should be used on this system.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2071)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2072) for_each_online_cpu(cpu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2073) smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2074) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2075) kvm_err("Error, CPU %d not supported!\n", cpu);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2076) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2077) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2078) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2079)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2080) err = init_common_resources();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2081) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2082) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2083)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2084) err = kvm_arm_init_sve();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2085) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2086) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2087)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2088) if (!in_hyp_mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2089) err = init_hyp_mode();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2090) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2091) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2092) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2093)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2094) err = kvm_init_vector_slots();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2095) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2096) kvm_err("Cannot initialise vector slots\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2097) goto out_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2098) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2099)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2100) err = init_subsystems();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2101) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2102) goto out_hyp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2104) if (!in_hyp_mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2105) err = finalize_hyp_mode();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2106) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2107) kvm_err("Failed to finalize Hyp protection\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2108) goto out_hyp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2112) if (is_protected_kvm_enabled()) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2113) kvm_info("Protected nVHE mode initialized successfully\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2114) } else if (in_hyp_mode) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2115) kvm_info("VHE mode initialized successfully\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2116) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2117) kvm_info("Hyp mode initialized successfully\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2120) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2122) out_hyp:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2123) hyp_cpu_pm_exit();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2124) if (!in_hyp_mode)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2125) teardown_hyp_mode();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2126) out_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2127) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2128) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2130) /* NOP: Compiling as a module not supported */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2131) void kvm_arch_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2133) kvm_perf_teardown();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2136) static int __init early_kvm_mode_cfg(char *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2138) if (!arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2139) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2141) if (strcmp(arg, "protected") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2142) kvm_mode = KVM_MODE_PROTECTED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2143) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2146) if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode()))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2147) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2149) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2151) early_param("kvm-arm.mode", early_kvm_mode_cfg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2153) enum kvm_mode kvm_get_mode(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2155) return kvm_mode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2156) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2158) static int arm_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2159) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2160) int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2161) return rc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2164) module_init(arm_init);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags