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vmm: Introduce option --platform iommufd=on|off

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This option allows user to configure VFIO device pass-through with
iommufd (e.g. vfio cdev mode) or not (e.g. vfio legacy mode).

Signed-off-by: Bo Chen <bchen@crusoe.ai>
This commit is contained in:
Bo Chen
2025-08-19 22:01:03 +00:00
parent 7f377eadd9
commit 13972a0edf
3 changed files with 15 additions and 2 deletions
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3
vmm/src/api/openapi/cloud-hypervisor.yaml
View File

@@ -794,6 +794,9 @@ components:
sev_snp: sev_snp:
type: boolean type: boolean
default: false default: false
iommufd:
type: boolean
default: false
MemoryZoneConfig: MemoryZoneConfig:
required: required:

12
vmm/src/config.rs
View File

@@ -804,7 +804,7 @@ impl PlatformConfig {
let mut syntax = "Platform configuration parameters \ let mut syntax = "Platform configuration parameters \
\"num_pci_segments=<num_pci_segments>,iommu_segments=<list_of_segments>,\ \"num_pci_segments=<num_pci_segments>,iommu_segments=<list_of_segments>,\
iommu_address_width=<bits>,serial_number=<dmi_device_serial_number>,\ iommu_address_width=<bits>,serial_number=<dmi_device_serial_number>,\
uuid=<dmi_device_uuid>,oem_strings=<list_of_strings>" uuid=<dmi_device_uuid>,oem_strings=<list_of_strings>,iommufd=on|off"
.to_string(); .to_string();
if cfg!(feature = "tdx") { if cfg!(feature = "tdx") {
@@ -831,7 +831,8 @@ impl PlatformConfig {
.add("iommu_address_width") .add("iommu_address_width")
.add("serial_number") .add("serial_number")
.add("uuid") .add("uuid")
.add("oem_strings"); .add("oem_strings")
.add("iommufd");
#[cfg(feature = "tdx")] #[cfg(feature = "tdx")]
parser.add("tdx"); parser.add("tdx");
#[cfg(feature = "sev_snp")] #[cfg(feature = "sev_snp")]
@@ -858,6 +859,11 @@ impl PlatformConfig {
.convert::<StringList>("oem_strings") .convert::<StringList>("oem_strings")
.map_err(Error::ParsePlatform)? .map_err(Error::ParsePlatform)?
.map(|v| v.0); .map(|v| v.0);
let iommufd = parser
.convert::<Toggle>("iommufd")
.map_err(Error::ParsePlatform)?
.unwrap_or(Toggle(false))
.0;
#[cfg(feature = "tdx")] #[cfg(feature = "tdx")]
let tdx = parser let tdx = parser
.convert::<Toggle>("tdx") .convert::<Toggle>("tdx")
@@ -877,6 +883,7 @@ impl PlatformConfig {
serial_number, serial_number,
uuid, uuid,
oem_strings, oem_strings,
iommufd,
#[cfg(feature = "tdx")] #[cfg(feature = "tdx")]
tdx, tdx,
#[cfg(feature = "sev_snp")] #[cfg(feature = "sev_snp")]
@@ -4824,6 +4831,7 @@ id=\"{id}\",pci_segment={pci_segment},queue_sizes={queue_sizes}"
serial_number: None, serial_number: None,
uuid: None, uuid: None,
oem_strings: None, oem_strings: None,
iommufd: false,
#[cfg(feature = "tdx")] #[cfg(feature = "tdx")]
tdx: false, tdx: false,
#[cfg(feature = "sev_snp")] #[cfg(feature = "sev_snp")]

2
vmm/src/vm_config.rs
View File

@@ -133,6 +133,8 @@ pub struct PlatformConfig {
#[cfg(feature = "sev_snp")] #[cfg(feature = "sev_snp")]
#[serde(default)] #[serde(default)]
pub sev_snp: bool, pub sev_snp: bool,
#[serde(default)]
pub iommufd: bool,
} }
pub const DEFAULT_PCI_SEGMENT_APERTURE_WEIGHT: u32 = 1; pub const DEFAULT_PCI_SEGMENT_APERTURE_WEIGHT: u32 = 1;