dragonball: add device manager.

Device manager to manage IO devices for a virtual machine. And added
DeviceManagerTx to provide operation transaction for device management,
added DeviceManagerContext to operation context for device management.

Fixes: #4257

Signed-off-by: Liu Jiang <gerry@linux.alibaba.com>
Signed-off-by: wllenyj <wllenyj@linux.alibaba.com>
Signed-off-by: Chao Wu <chaowu@linux.alibaba.com>

src/dragonball/Cargo.toml

@@ -16,8 +16,10 @@ dbs-address-space = "0.1.0"
 dbs-allocator = "0.1.0"
 dbs-boot = "0.2.0"
 dbs-device = "0.1.0"
+dbs-interrupt = { version = "0.1.0", features = ["kvm-irq"] }
 dbs-legacy-devices = "0.1.0"
 dbs-utils = "0.1.0"
+dbs-virtio-devices = { version = "0.1.0", optional = true, features = ["virtio-mmio"] }
 kvm-bindings = "0.5.0"
 kvm-ioctls = "0.11.0"
 libc = "0.2.39"
@@ -31,6 +33,7 @@ slog = "2.5.2"
 slog-scope = "4.4.0"
 thiserror = "1"
 vmm-sys-util = "0.9.0"
+virtio-queue = { version = "0.1.0", optional = true }
 vm-memory = { version = "0.7.0", features = ["backend-mmap"] }
 
 [dev-dependencies]
@@ -42,3 +45,4 @@ atomic-guest-memory = []
 
 [patch.'crates-io']
 dbs-legacy-devices = { git = "https://github.com/openanolis/dragonball-sandbox.git", rev = "8e1181eca897b5c5e8e6ac45e3a5c995461865be" }
+dbs-virtio-devices = { git = "https://github.com/openanolis/dragonball-sandbox.git", rev = "8e1181eca897b5c5e8e6ac45e3a5c995461865be" }