1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (c) 2022 Ventana Micro Systems Inc.
4 */
5
6 #ifndef __KVM_VCPU_RISCV_INSN_H
7 #define __KVM_VCPU_RISCV_INSN_H
8
9 struct kvm_vcpu;
10 struct kvm_run;
11 struct kvm_cpu_trap;
12
13 struct kvm_mmio_decode {
14 unsigned long insn;
15 int insn_len;
16 int len;
17 int shift;
18 int return_handled;
19 };
20
21 struct kvm_csr_decode {
22 unsigned long insn;
23 int return_handled;
24 };
25
26 /* Return values used by function emulating a particular instruction */
27 enum kvm_insn_return {
28 KVM_INSN_EXIT_TO_USER_SPACE = 0,
29 KVM_INSN_CONTINUE_NEXT_SEPC,
30 KVM_INSN_CONTINUE_SAME_SEPC,
31 KVM_INSN_ILLEGAL_TRAP,
32 KVM_INSN_VIRTUAL_TRAP
33 };
34
35 void kvm_riscv_vcpu_wfi(struct kvm_vcpu *vcpu);
36 int kvm_riscv_vcpu_csr_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
37 int kvm_riscv_vcpu_virtual_insn(struct kvm_vcpu *vcpu, struct kvm_run *run,
38 struct kvm_cpu_trap *trap);
39
40 int kvm_riscv_vcpu_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run,
41 unsigned long fault_addr,
42 unsigned long htinst);
43 int kvm_riscv_vcpu_mmio_store(struct kvm_vcpu *vcpu, struct kvm_run *run,
44 unsigned long fault_addr,
45 unsigned long htinst);
46 int kvm_riscv_vcpu_mmio_return(struct kvm_vcpu *vcpu, struct kvm_run *run);
47
48 #endif
49
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