1caab277bSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 213720a56SMarc Zyngier /* 313720a56SMarc Zyngier * Copyright (C) 2015 - ARM Ltd 413720a56SMarc Zyngier * Author: Marc Zyngier <marc.zyngier@arm.com> 513720a56SMarc Zyngier */ 613720a56SMarc Zyngier 713720a56SMarc Zyngier #ifndef __ARM64_KVM_HYP_H__ 813720a56SMarc Zyngier #define __ARM64_KVM_HYP_H__ 913720a56SMarc Zyngier 1013720a56SMarc Zyngier #include <linux/compiler.h> 1113720a56SMarc Zyngier #include <linux/kvm_host.h> 121e4448c5SMarc Zyngier #include <asm/alternative.h> 1313720a56SMarc Zyngier #include <asm/sysreg.h> 1413720a56SMarc Zyngier 15b619d9aaSAndrew Scull DECLARE_PER_CPU(struct kvm_cpu_context, kvm_hyp_ctxt); 16a0e47952SAndrew Scull DECLARE_PER_CPU(unsigned long, kvm_hyp_vector); 1763fec243SDavid Brazdil DECLARE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params); 18a0e47952SAndrew Scull 1913720a56SMarc Zyngier #define read_sysreg_elx(r,nvh,vh) \ 2013720a56SMarc Zyngier ({ \ 2113720a56SMarc Zyngier u64 reg; \ 22fdec2a9eSDave Martin asm volatile(ALTERNATIVE(__mrs_s("%0", r##nvh), \ 23be604c61SKees Cook __mrs_s("%0", r##vh), \ 2413720a56SMarc Zyngier ARM64_HAS_VIRT_HOST_EXTN) \ 2513720a56SMarc Zyngier : "=r" (reg)); \ 2613720a56SMarc Zyngier reg; \ 2713720a56SMarc Zyngier }) 2813720a56SMarc Zyngier 2913720a56SMarc Zyngier #define write_sysreg_elx(v,r,nvh,vh) \ 3013720a56SMarc Zyngier do { \ 3113720a56SMarc Zyngier u64 __val = (u64)(v); \ 32fdec2a9eSDave Martin asm volatile(ALTERNATIVE(__msr_s(r##nvh, "%x0"), \ 33be604c61SKees Cook __msr_s(r##vh, "%x0"), \ 3413720a56SMarc Zyngier ARM64_HAS_VIRT_HOST_EXTN) \ 3513720a56SMarc Zyngier : : "rZ" (__val)); \ 3613720a56SMarc Zyngier } while (0) 3713720a56SMarc Zyngier 3813720a56SMarc Zyngier /* 3913720a56SMarc Zyngier * Unified accessors for registers that have a different encoding 4013720a56SMarc Zyngier * between VHE and non-VHE. They must be specified without their "ELx" 41fdec2a9eSDave Martin * encoding, but with the SYS_ prefix, as defined in asm/sysreg.h. 4213720a56SMarc Zyngier */ 4313720a56SMarc Zyngier 4413720a56SMarc Zyngier #define read_sysreg_el0(r) read_sysreg_elx(r, _EL0, _EL02) 4513720a56SMarc Zyngier #define write_sysreg_el0(v,r) write_sysreg_elx(v, r, _EL0, _EL02) 4613720a56SMarc Zyngier #define read_sysreg_el1(r) read_sysreg_elx(r, _EL1, _EL12) 4713720a56SMarc Zyngier #define write_sysreg_el1(v,r) write_sysreg_elx(v, r, _EL1, _EL12) 48fdec2a9eSDave Martin #define read_sysreg_el2(r) read_sysreg_elx(r, _EL2, _EL1) 49fdec2a9eSDave Martin #define write_sysreg_el2(v,r) write_sysreg_elx(v, r, _EL2, _EL1) 5013720a56SMarc Zyngier 518c2d146eSJames Morse /* 528c2d146eSJames Morse * Without an __arch_swab32(), we fall back to ___constant_swab32(), but the 538c2d146eSJames Morse * static inline can allow the compiler to out-of-line this. KVM always wants 548c2d146eSJames Morse * the macro version as its always inlined. 558c2d146eSJames Morse */ 568c2d146eSJames Morse #define __kvm_swab32(x) ___constant_swab32(x) 578c2d146eSJames Morse 583272f0d0SMarc Zyngier int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu); 5913720a56SMarc Zyngier 60fc5d1f1aSChristoffer Dall void __vgic_v3_save_state(struct vgic_v3_cpu_if *cpu_if); 61fc5d1f1aSChristoffer Dall void __vgic_v3_restore_state(struct vgic_v3_cpu_if *cpu_if); 62fc5d1f1aSChristoffer Dall void __vgic_v3_activate_traps(struct vgic_v3_cpu_if *cpu_if); 63fc5d1f1aSChristoffer Dall void __vgic_v3_deactivate_traps(struct vgic_v3_cpu_if *cpu_if); 64fc5d1f1aSChristoffer Dall void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if); 65fc5d1f1aSChristoffer Dall void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if); 6659da1cbfSMarc Zyngier int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu); 6713720a56SMarc Zyngier 689aebdea4SDavid Brazdil #ifdef __KVM_NVHE_HYPERVISOR__ 69688c50aaSChristoffer Dall void __timer_enable_traps(struct kvm_vcpu *vcpu); 70688c50aaSChristoffer Dall void __timer_disable_traps(struct kvm_vcpu *vcpu); 719aebdea4SDavid Brazdil #endif 7213720a56SMarc Zyngier 7313aeb9b4SDavid Brazdil #ifdef __KVM_NVHE_HYPERVISOR__ 744cdecabaSChristoffer Dall void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt); 754cdecabaSChristoffer Dall void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt); 7613aeb9b4SDavid Brazdil #else 77f837453dSChristoffer Dall void sysreg_save_host_state_vhe(struct kvm_cpu_context *ctxt); 78f837453dSChristoffer Dall void sysreg_restore_host_state_vhe(struct kvm_cpu_context *ctxt); 79f837453dSChristoffer Dall void sysreg_save_guest_state_vhe(struct kvm_cpu_context *ctxt); 80f837453dSChristoffer Dall void sysreg_restore_guest_state_vhe(struct kvm_cpu_context *ctxt); 8113aeb9b4SDavid Brazdil #endif 8213720a56SMarc Zyngier 83014c4c77SChristoffer Dall void __debug_switch_to_guest(struct kvm_vcpu *vcpu); 84014c4c77SChristoffer Dall void __debug_switch_to_host(struct kvm_vcpu *vcpu); 8513720a56SMarc Zyngier 8613720a56SMarc Zyngier void __fpsimd_save_state(struct user_fpsimd_state *fp_regs); 8713720a56SMarc Zyngier void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs); 8813720a56SMarc Zyngier 8909cf57ebSDavid Brazdil #ifndef __KVM_NVHE_HYPERVISOR__ 90a2465629SChristoffer Dall void activate_traps_vhe_load(struct kvm_vcpu *vcpu); 91a2465629SChristoffer Dall void deactivate_traps_vhe_put(void); 9209cf57ebSDavid Brazdil #endif 93a2465629SChristoffer Dall 94b619d9aaSAndrew Scull u64 __guest_enter(struct kvm_vcpu *vcpu); 9509cf57ebSDavid Brazdil 96*eeeee719SDavid Brazdil bool kvm_host_psci_handler(struct kvm_cpu_context *host_ctxt); 97*eeeee719SDavid Brazdil 986a0259edSAndrew Scull void __noreturn hyp_panic(void); 9909cf57ebSDavid Brazdil #ifdef __KVM_NVHE_HYPERVISOR__ 100a2e102e2SAndrew Scull void __noreturn __hyp_do_panic(bool restore_host, u64 spsr, u64 elr, u64 par); 10109cf57ebSDavid Brazdil #endif 10213720a56SMarc Zyngier 10313720a56SMarc Zyngier #endif /* __ARM64_KVM_HYP_H__ */ 104