1 /* SPDX-License-Identifier: GPL-2.0-only */
3 * Copyright (C) 2015 - ARM Ltd
4 * Author: Marc Zyngier <marc.zyngier@arm.com>
7 #ifndef __ARM64_KVM_HYP_H__
8 #define __ARM64_KVM_HYP_H__
10 #include <linux/compiler.h>
11 #include <linux/kvm_host.h>
12 #include <asm/alternative.h>
13 #include <asm/sysreg.h>
15 #define read_sysreg_elx(r,nvh,vh) \
18 asm volatile(ALTERNATIVE(__mrs_s("%0", r##nvh), \
19 __mrs_s("%0", r##vh), \
20 ARM64_HAS_VIRT_HOST_EXTN) \
25 #define write_sysreg_elx(v,r,nvh,vh) \
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) \
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.
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)
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.
52 #define __kvm_swab32(x) ___constant_swab32(x)
54 int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu);
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);
64 #ifdef __KVM_NVHE_HYPERVISOR__
65 void __timer_enable_traps(struct kvm_vcpu *vcpu);
66 void __timer_disable_traps(struct kvm_vcpu *vcpu);
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);
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);
79 void __debug_switch_to_guest(struct kvm_vcpu *vcpu);
80 void __debug_switch_to_host(struct kvm_vcpu *vcpu);
82 void __fpsimd_save_state(struct user_fpsimd_state *fp_regs);
83 void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs);
85 #ifndef __KVM_NVHE_HYPERVISOR__
86 void activate_traps_vhe_load(struct kvm_vcpu *vcpu);
87 void deactivate_traps_vhe_put(void);
90 u64 __guest_enter(struct kvm_vcpu *vcpu, struct kvm_cpu_context *host_ctxt);
92 void __noreturn hyp_panic(struct kvm_cpu_context *host_ctxt);
93 #ifdef __KVM_NVHE_HYPERVISOR__
94 void __noreturn __hyp_do_panic(unsigned long, ...);
97 #endif /* __ARM64_KVM_HYP_H__ */