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