Struct BackendCapabilities 

#[non_exhaustive]
pub struct BackendCapabilities {
    pub kind: BackendKind,
    pub max_vcpus: u32,
    pub dirty_page_tracking: bool,
    pub postcopy_restore: bool,
    pub exposes_vcpu_exits: bool,
    pub custom_mmio_devices: bool,
}

What a backend can and cannot do, surfaced to the VMM at construction time.

The VMM consults this struct to decide whether to reject a configuration up-front (e.g. track_dirty_pages: true on the VZ backend) or to apply a documented fallback.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

kind: BackendKind

Which backend produced these capabilities.

max_vcpus: u32

Maximum number of vCPUs this backend will allow per VM.

dirty_page_tracking: bool

true if the backend can produce a per-page dirty bitmap.

postcopy_restore: bool

true if the backend can perform a postcopy / on-demand-paging restore.

exposes_vcpu_exits: bool

true if the backend exposes vCPU exits to userspace (HVF/KVM-style); false if the device model is hidden inside the framework (VZ-style).

custom_mmio_devices: bool

true if the backend supports custom virtio-MMIO devices.

Trait Implementations

impl Clone for BackendCapabilities

fn clone(&self) -> BackendCapabilities

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BackendCapabilities

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for BackendCapabilities

fn eq(&self, other: &BackendCapabilities) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for BackendCapabilities

impl Eq for BackendCapabilities

impl StructuralPartialEq for BackendCapabilities