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usr
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src
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linux-headers-6.8.0-36-generic
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arch
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arm64
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include
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asm
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kvm_hyp.h
/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2015 - ARM Ltd * Author: Marc Zyngier <marc.zyngier@arm.com> */ #ifndef __ARM64_KVM_HYP_H__ #define __ARM64_KVM_HYP_H__ #include <linux/compiler.h> #include <linux/kvm_host.h> #include <asm/alternative.h> #include <asm/sysreg.h> DECLARE_PER_CPU(struct kvm_cpu_context, kvm_hyp_ctxt); DECLARE_PER_CPU(unsigned long, kvm_hyp_vector); DECLARE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params); /* * Unified accessors for registers that have a different encoding * between VHE and non-VHE. They must be specified without their "ELx" * encoding, but with the SYS_ prefix, as defined in asm/sysreg.h. */ #if defined(__KVM_VHE_HYPERVISOR__) #define read_sysreg_el0(r) read_sysreg_s(r##_EL02) #define write_sysreg_el0(v,r) write_sysreg_s(v, r##_EL02) #define read_sysreg_el1(r) read_sysreg_s(r##_EL12) #define write_sysreg_el1(v,r) write_sysreg_s(v, r##_EL12) #define read_sysreg_el2(r) read_sysreg_s(r##_EL1) #define write_sysreg_el2(v,r) write_sysreg_s(v, r##_EL1) #else // !__KVM_VHE_HYPERVISOR__ #if defined(__KVM_NVHE_HYPERVISOR__) #define VHE_ALT_KEY ARM64_KVM_HVHE #else #define VHE_ALT_KEY ARM64_HAS_VIRT_HOST_EXTN #endif #define read_sysreg_elx(r,nvh,vh) \ ({ \ u64 reg; \ asm volatile(ALTERNATIVE(__mrs_s("%0", r##nvh), \ __mrs_s("%0", r##vh), \ VHE_ALT_KEY) \ : "=r" (reg)); \ reg; \ }) #define write_sysreg_elx(v,r,nvh,vh) \ do { \ u64 __val = (u64)(v); \ asm volatile(ALTERNATIVE(__msr_s(r##nvh, "%x0"), \ __msr_s(r##vh, "%x0"), \ VHE_ALT_KEY) \ : : "rZ" (__val)); \ } while (0) #define read_sysreg_el0(r) read_sysreg_elx(r, _EL0, _EL02) #define write_sysreg_el0(v,r) write_sysreg_elx(v, r, _EL0, _EL02) #define read_sysreg_el1(r) read_sysreg_elx(r, _EL1, _EL12) #define write_sysreg_el1(v,r) write_sysreg_elx(v, r, _EL1, _EL12) #define read_sysreg_el2(r) read_sysreg_elx(r, _EL2, _EL1) #define write_sysreg_el2(v,r) write_sysreg_elx(v, r, _EL2, _EL1) #endif // __KVM_VHE_HYPERVISOR__ /* * Without an __arch_swab32(), we fall back to ___constant_swab32(), but the * static inline can allow the compiler to out-of-line this. KVM always wants * the macro version as its always inlined. */ #define __kvm_swab32(x) ___constant_swab32(x) int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu); void __vgic_v3_save_state(struct vgic_v3_cpu_if *cpu_if); void __vgic_v3_restore_state(struct vgic_v3_cpu_if *cpu_if); void __vgic_v3_activate_traps(struct vgic_v3_cpu_if *cpu_if); void __vgic_v3_deactivate_traps(struct vgic_v3_cpu_if *cpu_if); void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if); void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if); int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu); #ifdef __KVM_NVHE_HYPERVISOR__ void __timer_enable_traps(struct kvm_vcpu *vcpu); void __timer_disable_traps(struct kvm_vcpu *vcpu); #endif #ifdef __KVM_NVHE_HYPERVISOR__ void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt); void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt); #else void __vcpu_load_switch_sysregs(struct kvm_vcpu *vcpu); void __vcpu_put_switch_sysregs(struct kvm_vcpu *vcpu); void sysreg_save_host_state_vhe(struct kvm_cpu_context *ctxt); void sysreg_restore_host_state_vhe(struct kvm_cpu_context *ctxt); void sysreg_save_guest_state_vhe(struct kvm_cpu_context *ctxt); void sysreg_restore_guest_state_vhe(struct kvm_cpu_context *ctxt); #endif void __debug_switch_to_guest(struct kvm_vcpu *vcpu); void __debug_switch_to_host(struct kvm_vcpu *vcpu); #ifdef __KVM_NVHE_HYPERVISOR__ void __debug_save_host_buffers_nvhe(struct kvm_vcpu *vcpu); void __debug_restore_host_buffers_nvhe(struct kvm_vcpu *vcpu); #endif void __fpsimd_save_state(struct user_fpsimd_state *fp_regs); void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs); void __sve_restore_state(void *sve_pffr, u32 *fpsr); u64 __guest_enter(struct kvm_vcpu *vcpu); bool kvm_host_psci_handler(struct kvm_cpu_context *host_ctxt, u32 func_id); #ifdef __KVM_NVHE_HYPERVISOR__ void __noreturn __hyp_do_panic(struct kvm_cpu_context *host_ctxt, u64 spsr, u64 elr, u64 par); #endif #ifdef __KVM_NVHE_HYPERVISOR__ void __pkvm_init_switch_pgd(phys_addr_t phys, unsigned long size, phys_addr_t pgd, void *sp, void *cont_fn); int __pkvm_init(phys_addr_t phys, unsigned long size, unsigned long nr_cpus, unsigned long *per_cpu_base, u32 hyp_va_bits); void __noreturn __host_enter(struct kvm_cpu_context *host_ctxt); #endif extern u64 kvm_nvhe_sym(id_aa64pfr0_el1_sys_val); extern u64 kvm_nvhe_sym(id_aa64pfr1_el1_sys_val); extern u64 kvm_nvhe_sym(id_aa64isar0_el1_sys_val); extern u64 kvm_nvhe_sym(id_aa64isar1_el1_sys_val); extern u64 kvm_nvhe_sym(id_aa64isar2_el1_sys_val); extern u64 kvm_nvhe_sym(id_aa64mmfr0_el1_sys_val); extern u64 kvm_nvhe_sym(id_aa64mmfr1_el1_sys_val); extern u64 kvm_nvhe_sym(id_aa64mmfr2_el1_sys_val); extern u64 kvm_nvhe_sym(id_aa64smfr0_el1_sys_val); extern unsigned long kvm_nvhe_sym(__icache_flags); extern unsigned int kvm_nvhe_sym(kvm_arm_vmid_bits); #endif /* __ARM64_KVM_HYP_H__ */
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