Enum HypervisorCap

pub enum HypervisorCap {
    ImmediateExit,
    UserMemory,
    Xcrs,
    CalibratedTscLeafRequired,
    StaticSwiotlbAllocationRequired,
    HypervisorInitializedBootContext,
}

An enumeration of different hypervisor capabilities.

Variants

ImmediateExit

UserMemory

Xcrs

CalibratedTscLeafRequired

CPUID leaf 0x15 is available on some Intel chips and contains the TSC frequency, which can be used to calibrate the guest’s TSC clocksource; however, it is not typically accurate enough (being off by 1-2% is a big problem for a clocksource), and inside the guest, calibration by other means is not always reliable.

Hypervisors which do not provide the TSC frequency (e.g. via the kvm pvclock) or have another suitable calibration source can declare this capability, which causes crosvm to substitute a calibrated value in leaf 0x15 that will be accurate enough for use in a clocksource.

StaticSwiotlbAllocationRequired

HypervisorInitializedBootContext

Some hypervisors (presently: Gunyah) will configure initial boot-time registers for vCPUs without need for CrosVM to specify.

If this capability is declared, then crosvm will not try to initialize vcpu registers when creating the VM.

Trait Implementations

impl Clone for HypervisorCap

fn clone(&self) -> HypervisorCap

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for HypervisorCap

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

Formats the value using the given formatter.

impl PartialEq for HypervisorCap

fn eq(&self, other: &HypervisorCap) -> 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 TryFrom<HypervisorCap> for KvmCap

type Error = Error

The type returned in the event of a conversion error.

fn try_from(cap: HypervisorCap) -> Result<KvmCap>

Performs the conversion.

impl Copy for HypervisorCap

impl Eq for HypervisorCap

impl StructuralPartialEq for HypervisorCap