hypervisors: introduce pkg to unbreak vc/persist dependency

Initial hypervisors pkg, with just basic state types defined.

Fixes: #2883

Signed-off-by: Eric Ernst <eric_ernst@apple.com>

src/runtime/pkg/hypervisors/hypervisor_state.go

@@ -0,0 +1,50 @@
+// Copyright (c) 2019 Huawei Corporation
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+package hypervisors
+
+// Bridge is a bridge where devices can be hot plugged
+type Bridge struct {
+	// DeviceAddr contains information about devices plugged and its address in the bridge
+	DeviceAddr map[uint32]string
+
+	// Type is the type of the bridge (pci, pcie, etc)
+	Type string
+
+	//ID is used to identify the bridge in the hypervisor
+	ID string
+
+	// Addr is the PCI/e slot of the bridge
+	Addr int
+}
+
+// CPUDevice represents a CPU device which was hot-added in a running VM
+type CPUDevice struct {
+	// ID is used to identify this CPU in the hypervisor options.
+	ID string
+}
+
+type HypervisorState struct {
+	BlockIndexMap map[int]struct{}
+
+	// Type of hypervisor, E.g. qemu/firecracker/acrn.
+	Type string
+	UUID string
+	// clh sepcific: refer to 'virtcontainers/clh.go:CloudHypervisorState'
+	APISocket string
+
+	// Belows are qemu specific
+	// Refs: virtcontainers/qemu.go:QemuState
+	Bridges []Bridge
+	// HotpluggedCPUs is the list of CPUs that were hot-added
+	HotpluggedVCPUs []CPUDevice
+
+	HotpluggedMemory int
+	VirtiofsdPid     int
+	Pid              int
+	PCIeRootPort     int
+
+	HotplugVFIOOnRootBus bool
+}