49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2022 Ventana Micro Systems Inc.
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*/
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#ifndef __KVM_VCPU_RISCV_INSN_H
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#define __KVM_VCPU_RISCV_INSN_H
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struct kvm_vcpu;
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struct kvm_run;
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struct kvm_cpu_trap;
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struct kvm_mmio_decode {
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unsigned long insn;
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int insn_len;
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int len;
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int shift;
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int return_handled;
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};
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struct kvm_csr_decode {
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unsigned long insn;
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int return_handled;
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};
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/* Return values used by function emulating a particular instruction */
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enum kvm_insn_return {
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KVM_INSN_EXIT_TO_USER_SPACE = 0,
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KVM_INSN_CONTINUE_NEXT_SEPC,
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KVM_INSN_CONTINUE_SAME_SEPC,
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KVM_INSN_ILLEGAL_TRAP,
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KVM_INSN_VIRTUAL_TRAP
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};
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void kvm_riscv_vcpu_wfi(struct kvm_vcpu *vcpu);
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int kvm_riscv_vcpu_csr_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
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int kvm_riscv_vcpu_virtual_insn(struct kvm_vcpu *vcpu, struct kvm_run *run,
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struct kvm_cpu_trap *trap);
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int kvm_riscv_vcpu_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run,
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unsigned long fault_addr,
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unsigned long htinst);
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int kvm_riscv_vcpu_mmio_store(struct kvm_vcpu *vcpu, struct kvm_run *run,
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unsigned long fault_addr,
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unsigned long htinst);
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int kvm_riscv_vcpu_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
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#endif
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