Switch benchmarks to IoMemory

Walk the talk and use the intended primary interface to vm-memory.
Tests cannot do that because they need to peek at the collection
of GuestMemroyRegions.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Author: bonzini

benches/guest_memory.rs

@@ -7,7 +7,7 @@ use core::hint::black_box;
 pub use criterion::Criterion;
 
 use vm_memory::bitmap::Bitmap;
-use vm_memory::{GuestAddress, GuestMemory, GuestMemoryMmap};
+use vm_memory::{GuestAddress, IoMemory, GuestMemoryMmap};
 
 const REGION_SIZE: usize = 0x10_0000;
 const REGIONS_COUNT: u64 = 256;

benches/mmap/mod.rs

@@ -17,7 +17,7 @@ use std::path::Path;
 use core::hint::black_box;
 use criterion::Criterion;
 
-use vm_memory::{ByteValued, Bytes, GuestAddress, GuestMemory};
+use vm_memory::{ByteValued, Bytes, GuestAddress, IoMemory};
 
 const REGION_SIZE: usize = 0x8000_0000;
 const REGIONS_COUNT: u64 = 8;