misc: Upgrade to use the vm-memory crate w/ dirty-page-tracking

As the first step to complete live-migration with tracking dirty-pages
written by the VMM, this commit patches the dependent vm-memory crate to
the upstream version with the dirty-page-tracking capability. Most
changes are due to the updated `GuestMemoryMmap`, `GuestRegionMmap`, and
`MmapRegion` structs which are taking an additional generic type
parameter to specify what 'bitmap backend' is used.

The above changes should be transparent to the rest of the code base,
e.g. all unit/integration tests should pass without additional changes.

Signed-off-by: Bo Chen <chen.bo@intel.com>

arch/src/x86_64/mod.rs

@@ -12,6 +12,7 @@ pub mod layout;
 mod mpspec;
 mod mptable;
 pub mod regs;
+use crate::GuestMemoryMmap;
 use crate::InitramfsConfig;
 use crate::RegionType;
 use hypervisor::{CpuId, CpuIdEntry, CPUID_FLAG_VALID_INDEX};
@@ -22,7 +23,7 @@ use linux_loader::loader::elf::start_info::{
 use std::mem;
 use vm_memory::{
     Address, ByteValued, Bytes, GuestAddress, GuestAddressSpace, GuestMemory, GuestMemoryAtomic,
-    GuestMemoryMmap, GuestMemoryRegion, GuestUsize,
+    GuestMemoryRegion, GuestUsize,
 };
 mod smbios;
 use std::arch::x86_64;

arch/src/x86_64/mptable.rs

@@ -7,14 +7,13 @@
 
 use crate::layout::{APIC_START, HIGH_RAM_START, IOAPIC_START};
 use crate::x86_64::mpspec;
+use crate::GuestMemoryMmap;
 use libc::c_char;
 use std::io;
 use std::mem;
 use std::result;
 use std::slice;
-use vm_memory::{
-    Address, ByteValued, Bytes, GuestAddress, GuestMemory, GuestMemoryError, GuestMemoryMmap,
-};
+use vm_memory::{Address, ByteValued, Bytes, GuestAddress, GuestMemory, GuestMemoryError};
 
 // This is a workaround to the Rust enforcement specifying that any implementation of a foreign
 // trait (in this case `ByteValued`) where:

arch/src/x86_64/regs.rs

@@ -7,12 +7,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE-BSD-3-Clause file.
 use crate::layout::{BOOT_GDT_START, BOOT_IDT_START, PVH_INFO_START};
+use crate::GuestMemoryMmap;
 use hypervisor::arch::x86::gdt::{gdt_entry, segment_from_gdt};
 use hypervisor::arch::x86::regs::*;
 use hypervisor::x86_64::{FpuState, SpecialRegisters, StandardRegisters};
 use std::sync::Arc;
 use std::{mem, result};
-use vm_memory::{Address, Bytes, GuestMemory, GuestMemoryError, GuestMemoryMmap};
+use vm_memory::{Address, Bytes, GuestMemory, GuestMemoryError};
 
 #[derive(Debug)]
 pub enum Error {
@@ -163,7 +164,8 @@ pub fn configure_segments_and_sregs(
 #[cfg(test)]
 mod tests {
     use super::*;
-    use vm_memory::{GuestAddress, GuestMemoryMmap};
+    use crate::GuestMemoryMmap;
+    use vm_memory::GuestAddress;
 
     fn create_guest_mem() -> GuestMemoryMmap {
         GuestMemoryMmap::from_ranges(&[(GuestAddress(0), 0x10000)]).unwrap()

arch/src/x86_64/smbios.rs

@@ -7,12 +7,13 @@
 // SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
 
 use crate::layout::SMBIOS_START;
+use crate::GuestMemoryMmap;
 use std::fmt::{self, Display};
 use std::mem;
 use std::result;
 use std::slice;
 use vm_memory::ByteValued;
-use vm_memory::{Address, Bytes, GuestAddress, GuestMemoryMmap};
+use vm_memory::{Address, Bytes, GuestAddress};
 
 #[allow(unused_variables)]
 #[derive(Debug)]

arch/src/x86_64/tdx/mod.rs

@@ -1,10 +1,11 @@
 // Copyright © 2021 Intel Corporation
 //
 // SPDX-License-Identifier: Apache-2.0
+use crate::GuestMemoryMmap;
 use std::fs::File;
 use std::io::{Read, Seek, SeekFrom};
 use thiserror::Error;
-use vm_memory::{ByteValued, Bytes, GuestAddress, GuestMemoryError, GuestMemoryMmap};
+use vm_memory::{ByteValued, Bytes, GuestAddress, GuestMemoryError};
 
 #[derive(Error, Debug)]
 pub enum TdvfError {