1/* SPDX-License-Identifier: GPL-2.0-only */ 2/* 3 * Copyright (C) 2015 - ARM Ltd 4 * Author: Marc Zyngier <marc.zyngier@arm.com> 5 */ 6 7#ifndef __ARM64_KVM_HYP_H__ 8#define __ARM64_KVM_HYP_H__ 9 10#include <linux/compiler.h> 11#include <linux/kvm_host.h> 12#include <asm/alternative.h> 13#include <asm/sysreg.h> 14 15DECLARE_PER_CPU(struct kvm_cpu_context, kvm_hyp_ctxt); 16DECLARE_PER_CPU(unsigned long, kvm_hyp_vector); 17DECLARE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params); 18 19/* 20 * Unified accessors for registers that have a different encoding 21 * between VHE and non-VHE. They must be specified without their "ELx" 22 * encoding, but with the SYS_ prefix, as defined in asm/sysreg.h. 23 */ 24 25#if defined(__KVM_VHE_HYPERVISOR__) 26 27#define read_sysreg_el0(r) read_sysreg_s(r##_EL02) 28#define write_sysreg_el0(v,r) write_sysreg_s(v, r##_EL02) 29#define read_sysreg_el1(r) read_sysreg_s(r##_EL12) 30#define write_sysreg_el1(v,r) write_sysreg_s(v, r##_EL12) 31#define read_sysreg_el2(r) read_sysreg_s(r##_EL1) 32#define write_sysreg_el2(v,r) write_sysreg_s(v, r##_EL1) 33 34#else // !__KVM_VHE_HYPERVISOR__ 35 36#if defined(__KVM_NVHE_HYPERVISOR__) 37#define VHE_ALT_KEY ARM64_KVM_HVHE 38#else 39#define VHE_ALT_KEY ARM64_HAS_VIRT_HOST_EXTN 40#endif 41 42#define read_sysreg_elx(r,nvh,vh) \ 43 ({ \ 44 u64 reg; \ 45 asm volatile(ALTERNATIVE(__mrs_s("%0", r##nvh), \ 46 __mrs_s("%0", r##vh), \ 47 VHE_ALT_KEY) \ 48 : "=r" (reg)); \ 49 reg; \ 50 }) 51 52#define write_sysreg_elx(v,r,nvh,vh) \ 53 do { \ 54 u64 __val = (u64)(v); \ 55 asm volatile(ALTERNATIVE(__msr_s(r##nvh, "%x0"), \ 56 __msr_s(r##vh, "%x0"), \ 57 VHE_ALT_KEY) \ 58 : : "rZ" (__val)); \ 59 } while (0) 60 61#define read_sysreg_el0(r) read_sysreg_elx(r, _EL0, _EL02) 62#define write_sysreg_el0(v,r) write_sysreg_elx(v, r, _EL0, _EL02) 63#define read_sysreg_el1(r) read_sysreg_elx(r, _EL1, _EL12) 64#define write_sysreg_el1(v,r) write_sysreg_elx(v, r, _EL1, _EL12) 65#define read_sysreg_el2(r) read_sysreg_elx(r, _EL2, _EL1) 66#define write_sysreg_el2(v,r) write_sysreg_elx(v, r, _EL2, _EL1) 67 68#endif // __KVM_VHE_HYPERVISOR__ 69 70/* 71 * Without an __arch_swab32(), we fall back to ___constant_swab32(), but the 72 * static inline can allow the compiler to out-of-line this. KVM always wants 73 * the macro version as it's always inlined. 74 */ 75#define __kvm_swab32(x) ___constant_swab32(x) 76 77int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu); 78 79void __vgic_v3_save_state(struct vgic_v3_cpu_if *cpu_if); 80void __vgic_v3_restore_state(struct vgic_v3_cpu_if *cpu_if); 81void __vgic_v3_activate_traps(struct vgic_v3_cpu_if *cpu_if); 82void __vgic_v3_deactivate_traps(struct vgic_v3_cpu_if *cpu_if); 83void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if); 84void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if); 85int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu); 86 87#ifdef __KVM_NVHE_HYPERVISOR__ 88void __timer_enable_traps(struct kvm_vcpu *vcpu); 89void __timer_disable_traps(struct kvm_vcpu *vcpu); 90#endif 91 92#ifdef __KVM_NVHE_HYPERVISOR__ 93void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt); 94void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt); 95#else 96void __vcpu_load_switch_sysregs(struct kvm_vcpu *vcpu); 97void __vcpu_put_switch_sysregs(struct kvm_vcpu *vcpu); 98void sysreg_save_host_state_vhe(struct kvm_cpu_context *ctxt); 99void sysreg_restore_host_state_vhe(struct kvm_cpu_context *ctxt); 100void sysreg_save_guest_state_vhe(struct kvm_cpu_context *ctxt); 101void sysreg_restore_guest_state_vhe(struct kvm_cpu_context *ctxt); 102#endif 103 104void __debug_switch_to_guest(struct kvm_vcpu *vcpu); 105void __debug_switch_to_host(struct kvm_vcpu *vcpu); 106 107#ifdef __KVM_NVHE_HYPERVISOR__ 108void __debug_save_host_buffers_nvhe(struct kvm_vcpu *vcpu); 109void __debug_restore_host_buffers_nvhe(struct kvm_vcpu *vcpu); 110#endif 111 112void __fpsimd_save_state(struct user_fpsimd_state *fp_regs); 113void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs); 114void __sve_restore_state(void *sve_pffr, u32 *fpsr); 115 116u64 __guest_enter(struct kvm_vcpu *vcpu); 117 118bool kvm_host_psci_handler(struct kvm_cpu_context *host_ctxt, u32 func_id); 119 120#ifdef __KVM_NVHE_HYPERVISOR__ 121void __noreturn __hyp_do_panic(struct kvm_cpu_context *host_ctxt, u64 spsr, 122 u64 elr, u64 par); 123#endif 124 125#ifdef __KVM_NVHE_HYPERVISOR__ 126void __pkvm_init_switch_pgd(phys_addr_t phys, unsigned long size, 127 phys_addr_t pgd, void *sp, void *cont_fn); 128int __pkvm_init(phys_addr_t phys, unsigned long size, unsigned long nr_cpus, 129 unsigned long *per_cpu_base, u32 hyp_va_bits); 130void __noreturn __host_enter(struct kvm_cpu_context *host_ctxt); 131#endif 132 133extern u64 kvm_nvhe_sym(id_aa64pfr0_el1_sys_val); 134extern u64 kvm_nvhe_sym(id_aa64pfr1_el1_sys_val); 135extern u64 kvm_nvhe_sym(id_aa64isar0_el1_sys_val); 136extern u64 kvm_nvhe_sym(id_aa64isar1_el1_sys_val); 137extern u64 kvm_nvhe_sym(id_aa64isar2_el1_sys_val); 138extern u64 kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val); 139extern u64 kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val); 140extern u64 kvm_nvhe_sym(id_aa64mmfr2_el1_sys_val); 141extern u64 kvm_nvhe_sym(id_aa64smfr0_el1_sys_val); 142 143extern unsigned long kvm_nvhe_sym(__icache_flags); 144extern unsigned int kvm_nvhe_sym(kvm_arm_vmid_bits); 145 146#endif /* __ARM64_KVM_HYP_H__ */ 147