openhcl/page_pool_alloc: support save restore (#418)

Support save restore for the page_pool_alloc crate. This allows save
restore of the shared visibility pool.

A future PR will add support for a private page pool to be used by AK
cert renewal and other usages.

Cargo.lock

@@ -4650,12 +4650,14 @@ dependencies = [
  "hvdef",
  "inspect",
  "memory_range",
+ "mesh",
  "parking_lot",
  "sparse_mmap",
  "thiserror 2.0.0",
  "tracing",
  "user_driver",
  "vm_topology",
+ "vmcore",
 ]
 
 [[package]]

openhcl/page_pool_alloc/Cargo.toml

@@ -13,19 +13,19 @@ vfio = ["user_driver/vfio"]
 hcl.workspace = true
 
 user_driver.workspace = true
-vm_topology.workspace = true
 hvdef.workspace = true
 sparse_mmap.workspace = true
+vmcore.workspace = true
+memory_range = { workspace = true, features = [ "inspect", "mesh" ] }
+vm_topology = { workspace = true, features = [ "inspect", "mesh" ] }
 
 inspect.workspace = true
+mesh.workspace = true
 
 parking_lot.workspace = true
 thiserror.workspace = true
 anyhow.workspace = true
 tracing.workspace = true
 
-[dev-dependencies]
-memory_range.workspace = true
-
 [lints]
 workspace = true