initial risc-v exampleHEADmaster

1 files changed, 48 insertions, 0 deletions

diff --git a/riscv/include/asm/kvm_vcpu_insn.h b/riscv/include/asm/kvm_vcpu_insn.h
new file mode 100644
index 0000000..350011c
--- /dev/null
+++ b/riscv/include/asm/kvm_vcpu_insn.h
@@ -0,0 +1,48 @@
+/* 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