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