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vm-virtio: Add virtio-mem device

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The basic idea of virtio-mem is to provide a flexible, cross-architecture
memory hot plug and hot unplug solution that avoids many limitations
imposed by existing technologies, architectures, and interfaces. More
details can be found in https://lkml.org/lkml/2019/12/12/681.

This commit add virtio-mem device.

Signed-off-by: Hui Zhu <teawater@antfin.com>
This commit is contained in:
Hui Zhu
2020-03-04 10:12:22 +08:00
committed by Sebastien Boeuf
parent 8d05fb86e3
commit 51d102c708
2 changed files with 965 additions and 0 deletions
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6
vm-virtio/src/lib.rs
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@@ -29,6 +29,7 @@ mod device;
pub mod block;
mod console;
mod iommu;
pub mod mem;
pub mod net;
pub mod net_util;
mod pmem;
@@ -43,6 +44,7 @@ pub use self::block::*;
pub use self::console::*;
pub use self::device::*;
pub use self::iommu::*;
pub use self::mem::*;
pub use self::net::*;
pub use self::net_util::*;
pub use self::pmem::*;
@@ -77,6 +79,7 @@ enum VirtioDeviceType {
TYPE_INPUT = 18,
TYPE_VSOCK = 19,
TYPE_IOMMU = 23,
TYPE_MEM = 24,
TYPE_FS = 26,
TYPE_PMEM = 27,
TYPE_UNKNOWN = 0xFF,
@@ -95,6 +98,7 @@ impl From<u32> for VirtioDeviceType {
18 => VirtioDeviceType::TYPE_INPUT,
19 => VirtioDeviceType::TYPE_VSOCK,
23 => VirtioDeviceType::TYPE_IOMMU,
24 => VirtioDeviceType::TYPE_MEM,
26 => VirtioDeviceType::TYPE_FS,
27 => VirtioDeviceType::TYPE_PMEM,
_ => VirtioDeviceType::TYPE_UNKNOWN,
@@ -118,6 +122,7 @@ impl fmt::Display for VirtioDeviceType {
VirtioDeviceType::TYPE_INPUT => "input",
VirtioDeviceType::TYPE_VSOCK => "vsock",
VirtioDeviceType::TYPE_IOMMU => "iommu",
VirtioDeviceType::TYPE_MEM => "mem",
VirtioDeviceType::TYPE_FS => "fs",
VirtioDeviceType::TYPE_PMEM => "pmem",
VirtioDeviceType::TYPE_UNKNOWN => "UNKNOWN",
@@ -176,4 +181,5 @@ pub enum Error {
EpollWait(io::Error),
FailedSignalingDriver(io::Error),
VhostUserUpdateMemory(vhost_user::Error),
EventfdError(io::Error),
}