Enum x86_64::PrivilegeLevel

#[repr(u8)]
pub enum PrivilegeLevel {
    Ring0 = 0,
    Ring1 = 1,
    Ring2 = 2,
    Ring3 = 3,
}

Represents a protection ring level.

Variants

Ring0 = 0

Privilege-level 0 (most privilege): This level is used by critical system-software components that require direct access to, and control over, all processor and system resources. This can include BIOS, memory-management functions, and interrupt handlers.

Ring1 = 1

Privilege-level 1 (moderate privilege): This level is used by less-critical system- software services that can access and control a limited scope of processor and system resources. Software running at these privilege levels might include some device drivers and library routines. The actual privileges of this level are defined by the operating system.

Ring2 = 2

Privilege-level 2 (moderate privilege): Like level 1, this level is used by less-critical system-software services that can access and control a limited scope of processor and system resources. The actual privileges of this level are defined by the operating system.

Ring3 = 3

Privilege-level 3 (least privilege): This level is used by application software. Software running at privilege-level 3 is normally prevented from directly accessing most processor and system resources. Instead, applications request access to the protected processor and system resources by calling more-privileged service routines to perform the accesses.

Implementations

impl PrivilegeLevel

pub const fn from_u16(value: u16) -> PrivilegeLevel

Creates a PrivilegeLevel from a numeric value. The value must be in the range 0..4.

This function panics if the passed value is >3.

Trait Implementations

impl Clone for PrivilegeLevel

fn clone(&self) -> PrivilegeLevel

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PrivilegeLevel

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

Formats the value using the given formatter.

impl Hash for PrivilegeLevel

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for PrivilegeLevel

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for PrivilegeLevel

impl Eq for PrivilegeLevel

impl StructuralPartialEq for PrivilegeLevel