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 1596547368SSami Tolvanen #define __hyp_text __section(.hyp.text) notrace __noscs 1613720a56SMarc Zyngier 1713720a56SMarc Zyngier #define read_sysreg_elx(r,nvh,vh) \ 1813720a56SMarc Zyngier ({ \ 1913720a56SMarc Zyngier u64 reg; \ 20fdec2a9eSDave Martin asm volatile(ALTERNATIVE(__mrs_s("%0", r##nvh), \ 21be604c61SKees Cook __mrs_s("%0", r##vh), \ 2213720a56SMarc Zyngier ARM64_HAS_VIRT_HOST_EXTN) \ 2313720a56SMarc Zyngier : "=r" (reg)); \ 2413720a56SMarc Zyngier reg; \ 2513720a56SMarc Zyngier }) 2613720a56SMarc Zyngier 2713720a56SMarc Zyngier #define write_sysreg_elx(v,r,nvh,vh) \ 2813720a56SMarc Zyngier do { \ 2913720a56SMarc Zyngier u64 __val = (u64)(v); \ 30fdec2a9eSDave Martin asm volatile(ALTERNATIVE(__msr_s(r##nvh, "%x0"), \ 31be604c61SKees Cook __msr_s(r##vh, "%x0"), \ 3213720a56SMarc Zyngier ARM64_HAS_VIRT_HOST_EXTN) \ 3313720a56SMarc Zyngier : : "rZ" (__val)); \ 3413720a56SMarc Zyngier } while (0) 3513720a56SMarc Zyngier 3613720a56SMarc Zyngier /* 3713720a56SMarc Zyngier * Unified accessors for registers that have a different encoding 3813720a56SMarc Zyngier * between VHE and non-VHE. They must be specified without their "ELx" 39fdec2a9eSDave Martin * encoding, but with the SYS_ prefix, as defined in asm/sysreg.h. 4013720a56SMarc Zyngier */ 4113720a56SMarc Zyngier 4213720a56SMarc Zyngier #define read_sysreg_el0(r) read_sysreg_elx(r, _EL0, _EL02) 4313720a56SMarc Zyngier #define write_sysreg_el0(v,r) write_sysreg_elx(v, r, _EL0, _EL02) 4413720a56SMarc Zyngier #define read_sysreg_el1(r) read_sysreg_elx(r, _EL1, _EL12) 4513720a56SMarc Zyngier #define write_sysreg_el1(v,r) write_sysreg_elx(v, r, _EL1, _EL12) 46fdec2a9eSDave Martin #define read_sysreg_el2(r) read_sysreg_elx(r, _EL2, _EL1) 47fdec2a9eSDave Martin #define write_sysreg_el2(v,r) write_sysreg_elx(v, r, _EL2, _EL1) 4813720a56SMarc Zyngier 498c2d146eSJames Morse /* 508c2d146eSJames Morse * Without an __arch_swab32(), we fall back to ___constant_swab32(), but the 518c2d146eSJames Morse * static inline can allow the compiler to out-of-line this. KVM always wants 528c2d146eSJames Morse * the macro version as its always inlined. 538c2d146eSJames Morse */ 548c2d146eSJames Morse #define __kvm_swab32(x) ___constant_swab32(x) 558c2d146eSJames Morse 563272f0d0SMarc Zyngier int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu); 5713720a56SMarc Zyngier 58fc5d1f1aSChristoffer Dall void __vgic_v3_save_state(struct vgic_v3_cpu_if *cpu_if); 59fc5d1f1aSChristoffer Dall void __vgic_v3_restore_state(struct vgic_v3_cpu_if *cpu_if); 60fc5d1f1aSChristoffer Dall void __vgic_v3_activate_traps(struct vgic_v3_cpu_if *cpu_if); 61fc5d1f1aSChristoffer Dall void __vgic_v3_deactivate_traps(struct vgic_v3_cpu_if *cpu_if); 62fc5d1f1aSChristoffer Dall void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if); 63fc5d1f1aSChristoffer Dall void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if); 6459da1cbfSMarc Zyngier int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu); 6513720a56SMarc Zyngier 66688c50aaSChristoffer Dall void __timer_enable_traps(struct kvm_vcpu *vcpu); 67688c50aaSChristoffer Dall void __timer_disable_traps(struct kvm_vcpu *vcpu); 6813720a56SMarc Zyngier 69*13aeb9b4SDavid Brazdil #ifdef __KVM_NVHE_HYPERVISOR__ 704cdecabaSChristoffer Dall void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt); 714cdecabaSChristoffer Dall void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt); 72*13aeb9b4SDavid Brazdil #else 73f837453dSChristoffer Dall void sysreg_save_host_state_vhe(struct kvm_cpu_context *ctxt); 74f837453dSChristoffer Dall void sysreg_restore_host_state_vhe(struct kvm_cpu_context *ctxt); 75f837453dSChristoffer Dall void sysreg_save_guest_state_vhe(struct kvm_cpu_context *ctxt); 76f837453dSChristoffer Dall void sysreg_restore_guest_state_vhe(struct kvm_cpu_context *ctxt); 77*13aeb9b4SDavid Brazdil #endif 7813720a56SMarc Zyngier 79014c4c77SChristoffer Dall void __debug_switch_to_guest(struct kvm_vcpu *vcpu); 80014c4c77SChristoffer Dall void __debug_switch_to_host(struct kvm_vcpu *vcpu); 8113720a56SMarc Zyngier 8213720a56SMarc Zyngier void __fpsimd_save_state(struct user_fpsimd_state *fp_regs); 8313720a56SMarc Zyngier void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs); 8413720a56SMarc Zyngier 8509cf57ebSDavid Brazdil #ifndef __KVM_NVHE_HYPERVISOR__ 86a2465629SChristoffer Dall void activate_traps_vhe_load(struct kvm_vcpu *vcpu); 87a2465629SChristoffer Dall void deactivate_traps_vhe_put(void); 8809cf57ebSDavid Brazdil #endif 89a2465629SChristoffer Dall 9013720a56SMarc Zyngier u64 __guest_enter(struct kvm_vcpu *vcpu, struct kvm_cpu_context *host_ctxt); 9109cf57ebSDavid Brazdil 9209cf57ebSDavid Brazdil void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt); 9309cf57ebSDavid Brazdil #ifdef __KVM_NVHE_HYPERVISOR__ 9413720a56SMarc Zyngier void __noreturn __hyp_do_panic(unsigned long, ...); 9509cf57ebSDavid Brazdil #endif 9613720a56SMarc Zyngier 9713720a56SMarc Zyngier #endif /* __ARM64_KVM_HYP_H__ */ 9813720a56SMarc Zyngier 99