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vmm: generic vhost-user: add support

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Add VMM support for generic vhost-user devices.

Signed-off-by: Demi Marie Obenour <demiobenour@gmail.com>
This commit is contained in:
Demi Marie Obenour
2026-02-04 09:52:42 -05:00
committed by Rob Bradford
parent 8c618ff5e0
commit 085a7a49fa
8 changed files with 515 additions and 8 deletions
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31
vmm/src/vm.rs
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@@ -100,8 +100,8 @@ use crate::migration::{SNAPSHOT_CONFIG_FILE, SNAPSHOT_STATE_FILE, url_to_path};
#[cfg(feature = "fw_cfg")]
use crate::vm_config::FwCfgConfig;
use crate::vm_config::{
DeviceConfig, DiskConfig, FsConfig, HotplugMethod, NetConfig, NumaConfig, PayloadConfig,
PmemConfig, UserDeviceConfig, VdpaConfig, VmConfig, VsockConfig,
DeviceConfig, DiskConfig, FsConfig, GenericVhostUserConfig, HotplugMethod, NetConfig,
NumaConfig, PayloadConfig, PmemConfig, UserDeviceConfig, VdpaConfig, VmConfig, VsockConfig,
};
use crate::{
CPU_MANAGER_SNAPSHOT_ID, DEVICE_MANAGER_SNAPSHOT_ID, GuestMemoryMmap,
@@ -2136,6 +2136,33 @@ impl Vm {
Ok(pci_device_info)
}
pub fn add_generic_vhost_user(
&mut self,
mut generic_vhost_user_cfg: GenericVhostUserConfig,
) -> Result<PciDeviceInfo> {
let pci_device_info = self
.device_manager
.lock()
.unwrap()
.add_generic_vhost_user(&mut generic_vhost_user_cfg)
.map_err(Error::DeviceManager)?;
// Update VmConfig by adding the new device. This is important to
// ensure the device would be created in case of a reboot.
{
let mut config = self.config.lock().unwrap();
add_to_config(&mut config.generic_vhost_user, generic_vhost_user_cfg);
}
self.device_manager
.lock()
.unwrap()
.notify_hotplug(AcpiNotificationFlags::PCI_DEVICES_CHANGED)
.map_err(Error::DeviceManager)?;
Ok(pci_device_info)
}
pub fn add_pmem(&mut self, mut pmem_cfg: PmemConfig) -> Result<PciDeviceInfo> {
let pci_device_info = self
.device_manager