pci: add pci crate from Cloud Hypervisor

Bring in pci crate from cloud hypervisor with a few modifications.
We use the rust-vmm vm-allocator crate instead of Cloud Hypervisor's
downstream one. For the time being, rust-vmm's implementation should
include all we need for supporting the devices we care about. If we need
more functionality from our allocators, we will implement the logic
directly in the rust-vmm vm-allocator crate.

Signed-off-by: Babis Chalios <[email protected]>

Author: bchalios

Cargo.lock

@@ -0,0 +1,22 @@
+[package]
+authors = ["Samuel Ortiz <[email protected]>"]
+edition = "2021"
+name = "pci"
+version = "0.1.0"
+
+[features]
+default = []
+
+[dependencies]
+anyhow = "1.0.94"
+byteorder = "1.5.0"
+libc = "0.2.172"
+log = "0.4.27"
+serde = { version = "1.0.219", features = ["derive"] }
+thiserror = "2.0.12"
+vm-allocator = "0.1.1"
+vm-device = { path = "../vm-device" }
+vm-memory = { version = "0.16.1", features = [
+  "backend-mmap",
+  "backend-bitmap",
+] }