/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * Copyright (c) 2022 Ventana Micro Systems Inc.
 */

#ifndef __KVM_VCPU_RISCV_INSN_H
#define __KVM_VCPU_RISCV_INSN_H

struct kvm_vcpu;
struct kvm_run;
struct kvm_cpu_trap;

struct kvm_mmio_decode {
        unsigned long insn;
        int insn_len;
        int len;
        int shift;
        int return_handled;
};

struct kvm_csr_decode {
        unsigned long insn;
        int return_handled;
};

/* Return values used by function emulating a particular instruction */
enum kvm_insn_return {
        KVM_INSN_EXIT_TO_USER_SPACE = 0,
        KVM_INSN_CONTINUE_NEXT_SEPC,
        KVM_INSN_CONTINUE_SAME_SEPC,
        KVM_INSN_ILLEGAL_TRAP,
        KVM_INSN_VIRTUAL_TRAP
};

void kvm_riscv_vcpu_wfi(struct kvm_vcpu *vcpu);
int kvm_riscv_vcpu_csr_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
int kvm_riscv_vcpu_virtual_insn(struct kvm_vcpu *vcpu, struct kvm_run *run,
                                struct kvm_cpu_trap *trap);

int kvm_riscv_vcpu_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run,
                             unsigned long fault_addr,
                             unsigned long htinst);
int kvm_riscv_vcpu_mmio_store(struct kvm_vcpu *vcpu, struct kvm_run *run,
                              unsigned long fault_addr,
                              unsigned long htinst);
int kvm_riscv_vcpu_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run);

#endif