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 15 DECLARE_PER_CPU(struct kvm_cpu_context, kvm_hyp_ctxt); 16 DECLARE_PER_CPU(unsigned long, kvm_hyp_vector); 17 DECLARE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params); 18 19 #define read_sysreg_elx(r,nvh,vh) \ 20 ({ \ 21 u64 reg; \ 22 asm volatile(ALTERNATIVE(__mrs_s("%0", r##nvh), \ 23 __mrs_s("%0", r##vh), \ 24 ARM64_HAS_VIRT_HOST_EXTN) \ 25 : "=r" (reg)); \ 26 reg; \ 27 }) 28 29 #define write_sysreg_elx(v,r,nvh,vh) \ 30 do { \ 31 u64 __val = (u64)(v); \ 32 asm volatile(ALTERNATIVE(__msr_s(r##nvh, "%x0"), \ 33 __msr_s(r##vh, "%x0"), \ 34 ARM64_HAS_VIRT_HOST_EXTN) \ 35 : : "rZ" (__val)); \ 36 } while (0) 37 38 /* 39 * Unified accessors for registers that have a different encoding 40 * between VHE and non-VHE. They must be specified without their "ELx" 41 * encoding, but with the SYS_ prefix, as defined in asm/sysreg.h. 42 */ 43 44 #define read_sysreg_el0(r) read_sysreg_elx(r, _EL0, _EL02) 45 #define write_sysreg_el0(v,r) write_sysreg_elx(v, r, _EL0, _EL02) 46 #define read_sysreg_el1(r) read_sysreg_elx(r, _EL1, _EL12) 47 #define write_sysreg_el1(v,r) write_sysreg_elx(v, r, _EL1, _EL12) 48 #define read_sysreg_el2(r) read_sysreg_elx(r, _EL2, _EL1) 49 #define write_sysreg_el2(v,r) write_sysreg_elx(v, r, _EL2, _EL1) 50 51 /* 52 * Without an __arch_swab32(), we fall back to ___constant_swab32(), but the 53 * static inline can allow the compiler to out-of-line this. KVM always wants 54 * the macro version as its always inlined. 55 */ 56 #define __kvm_swab32(x) ___constant_swab32(x) 57 58 int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu); 59 60 void __vgic_v3_save_state(struct vgic_v3_cpu_if *cpu_if); 61 void __vgic_v3_restore_state(struct vgic_v3_cpu_if *cpu_if); 62 void __vgic_v3_activate_traps(struct vgic_v3_cpu_if *cpu_if); 63 void __vgic_v3_deactivate_traps(struct vgic_v3_cpu_if *cpu_if); 64 void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if); 65 void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if); 66 int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu); 67 68 #ifdef __KVM_NVHE_HYPERVISOR__ 69 void __timer_enable_traps(struct kvm_vcpu *vcpu); 70 void __timer_disable_traps(struct kvm_vcpu *vcpu); 71 #endif 72 73 #ifdef __KVM_NVHE_HYPERVISOR__ 74 void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt); 75 void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt); 76 #else 77 void sysreg_save_host_state_vhe(struct kvm_cpu_context *ctxt); 78 void sysreg_restore_host_state_vhe(struct kvm_cpu_context *ctxt); 79 void sysreg_save_guest_state_vhe(struct kvm_cpu_context *ctxt); 80 void sysreg_restore_guest_state_vhe(struct kvm_cpu_context *ctxt); 81 #endif 82 83 void __debug_switch_to_guest(struct kvm_vcpu *vcpu); 84 void __debug_switch_to_host(struct kvm_vcpu *vcpu); 85 86 void __fpsimd_save_state(struct user_fpsimd_state *fp_regs); 87 void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs); 88 89 #ifndef __KVM_NVHE_HYPERVISOR__ 90 void activate_traps_vhe_load(struct kvm_vcpu *vcpu); 91 void deactivate_traps_vhe_put(void); 92 #endif 93 94 u64 __guest_enter(struct kvm_vcpu *vcpu); 95 96 bool kvm_host_psci_handler(struct kvm_cpu_context *host_ctxt); 97 98 void __noreturn hyp_panic(void); 99 #ifdef __KVM_NVHE_HYPERVISOR__ 100 void __noreturn __hyp_do_panic(bool restore_host, u64 spsr, u64 elr, u64 par); 101 #endif 102 103 #endif /* __ARM64_KVM_HYP_H__ */ 104