hypervisor: add Vm/Vcpu traits and Kvm impls

Add arch-agnostic traits Vm and Vcpu.  Add arch-specific traits
HypervisorXXX, VmXXX, VcpuXXX, with impls for KVM.

BUG=chromium:1077058
TEST=added test for functions and structs interacting with the traits

Change-Id: I809f42f32a558c7835831c90e24fca82ce7744ab
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2176562
Reviewed-by: Udam Saini <udam@google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Steven Richman <srichman@google.com>

1 files changed, 32 insertions, 0 deletions

diff --git a/hypervisor/src/kvm/x86_64.rs b/hypervisor/src/kvm/x86_64.rs
new file mode 100644
index 0000000..56681f9
--- /dev/null
+++ b/hypervisor/src/kvm/x86_64.rs
@@ -0,0 +1,32 @@
+// Copyright 2020 The Chromium OS Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+use sys_util::Result;
+
+use super::{Kvm, KvmVcpu, KvmVm};
+use crate::{CpuId, HypervisorX86_64, Regs, VcpuX86_64, VmX86_64};
+
+impl HypervisorX86_64 for Kvm {
+    fn get_supported_cpuid(&self) -> Result<CpuId> {
+        unimplemented!("get_supported_cpuid for Kvm is not yet implemented");
+    }
+
+    fn get_emulated_cpuid(&self) -> Result<CpuId> {
+        unimplemented!("get_emulated_cpuid for Kvm is not yet implemented");
+    }
+}
+
+impl VmX86_64 for KvmVm {
+    type Vcpu = KvmVcpu;
+
+    fn create_vcpu(&self, id: usize) -> Result<Self::Vcpu> {
+        self.create_kvm_vcpu(id)
+    }
+}
+
+impl VcpuX86_64 for KvmVcpu {
+    fn get_regs(&self) -> Result<Regs> {
+        Ok(Regs {})
+    }
+}