arch/riscv/include/asm/kvm_vcpu_insn.h

   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