chore(virtio-mem): create empty virtio/mem module

Create the new module for the virtio-mem device.

Signed-off-by: Riccardo Mancini <[email protected]>

Author: Manciukic

src/vmm/src/arch/mod.rs

@@ -22,11 +22,11 @@ pub use aarch64::vm::{ArchVm, ArchVmError, VmState};
 pub use aarch64::{
     ConfigurationError, arch_memory_regions, configure_system_for_boot, get_kernel_start,
     initrd_load_addr, layout::BOOT_DEVICE_MEM_START, layout::CMDLINE_MAX_SIZE,
-    layout::GSI_LEGACY_END, layout::GSI_LEGACY_NUM, layout::GSI_LEGACY_START, layout::GSI_MSI_END,
-    layout::GSI_MSI_NUM, layout::GSI_MSI_START, layout::MEM_32BIT_DEVICES_SIZE,
-    layout::MEM_32BIT_DEVICES_START, layout::MEM_64BIT_DEVICES_SIZE,
-    layout::MEM_64BIT_DEVICES_START, layout::MMIO32_MEM_SIZE, layout::MMIO32_MEM_START,
-    layout::PCI_MMCONFIG_SIZE, layout::PCI_MMCONFIG_START,
+    layout::FIRST_ADDR_PAST_64BITS_MMIO, layout::GSI_LEGACY_END, layout::GSI_LEGACY_NUM,
+    layout::GSI_LEGACY_START, layout::GSI_MSI_END, layout::GSI_MSI_NUM, layout::GSI_MSI_START,
+    layout::MEM_32BIT_DEVICES_SIZE, layout::MEM_32BIT_DEVICES_START,
+    layout::MEM_64BIT_DEVICES_SIZE, layout::MEM_64BIT_DEVICES_START, layout::MMIO32_MEM_SIZE,
+    layout::MMIO32_MEM_START, layout::PCI_MMCONFIG_SIZE, layout::PCI_MMCONFIG_START,
     layout::PCI_MMIO_CONFIG_SIZE_PER_SEGMENT, layout::RTC_MEM_START, layout::SERIAL_MEM_START,
     layout::SPI_START, layout::SYSTEM_MEM_SIZE, layout::SYSTEM_MEM_START, load_kernel,
 };
@@ -46,9 +46,9 @@ pub use x86_64::vm::{ArchVm, ArchVmError, VmState};
 pub use crate::arch::x86_64::{
     ConfigurationError, arch_memory_regions, configure_system_for_boot, get_kernel_start,
     initrd_load_addr, layout::APIC_ADDR, layout::BOOT_DEVICE_MEM_START, layout::CMDLINE_MAX_SIZE,
-    layout::GSI_LEGACY_END, layout::GSI_LEGACY_NUM, layout::GSI_LEGACY_START, layout::GSI_MSI_END,
-    layout::GSI_MSI_NUM, layout::GSI_MSI_START, layout::IOAPIC_ADDR,
-    layout::MEM_32BIT_DEVICES_SIZE, layout::MEM_32BIT_DEVICES_START,
+    layout::FIRST_ADDR_PAST_64BITS_MMIO, layout::GSI_LEGACY_END, layout::GSI_LEGACY_NUM,
+    layout::GSI_LEGACY_START, layout::GSI_MSI_END, layout::GSI_MSI_NUM, layout::GSI_MSI_START,
+    layout::IOAPIC_ADDR, layout::MEM_32BIT_DEVICES_SIZE, layout::MEM_32BIT_DEVICES_START,
     layout::MEM_64BIT_DEVICES_SIZE, layout::MEM_64BIT_DEVICES_START, layout::MMIO32_MEM_SIZE,
     layout::MMIO32_MEM_START, layout::PCI_MMCONFIG_SIZE, layout::PCI_MMCONFIG_START,
     layout::PCI_MMIO_CONFIG_SIZE_PER_SEGMENT, layout::SYSTEM_MEM_SIZE, layout::SYSTEM_MEM_START,

src/vmm/src/devices/virtio/mem/mod.rs

@@ -0,0 +1,14 @@
+// Copyright 2022 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+// SPDX-License-Identifier: Apache-2.0
+
+use vm_memory::GuestAddress;
+
+use crate::arch::FIRST_ADDR_PAST_64BITS_MMIO;
+
+pub(crate) const MEM_NUM_QUEUES: usize = 1;
+
+pub(crate) const MEM_QUEUE: usize = 0;
+
+pub const VIRTIO_MEM_DEFAULT_BLOCK_SIZE: usize = 2 << 20; // 2MiB
+pub const VIRTIO_MEM_DEFAULT_SLOT_SIZE: usize = 128 << 20; // 128 MiB
+pub const VIRTIO_MEM_GUEST_ADDRESS: GuestAddress = GuestAddress(FIRST_ADDR_PAST_64BITS_MMIO); // 512GiB

src/vmm/src/devices/virtio/mod.rs

@@ -18,6 +18,7 @@ pub mod device;
 pub mod generated;
 mod iov_deque;
 pub mod iovec;
+pub mod mem;
 pub mod net;
 pub mod persist;
 pub mod queue;