Enum x86_64::PrivilegeLevel
source · [−]#[repr(u8)]
pub enum PrivilegeLevel {
Ring0,
Ring1,
Ring2,
Ring3,
}
Expand description
Represents a protection ring level.
Variants
Ring0
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
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
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
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
sourceimpl PrivilegeLevel
impl PrivilegeLevel
sourcepub fn from_u16(value: u16) -> PrivilegeLevel
pub 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
sourceimpl Clone for PrivilegeLevel
impl Clone for PrivilegeLevel
sourcefn clone(&self) -> PrivilegeLevel
fn clone(&self) -> PrivilegeLevel
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source
. Read more
sourceimpl Debug for PrivilegeLevel
impl Debug for PrivilegeLevel
sourceimpl Hash for PrivilegeLevel
impl Hash for PrivilegeLevel
sourceimpl PartialEq<PrivilegeLevel> for PrivilegeLevel
impl PartialEq<PrivilegeLevel> for PrivilegeLevel
impl Copy for PrivilegeLevel
impl Eq for PrivilegeLevel
impl StructuralEq for PrivilegeLevel
impl StructuralPartialEq for PrivilegeLevel
Auto Trait Implementations
impl RefUnwindSafe for PrivilegeLevel
impl Send for PrivilegeLevel
impl Sync for PrivilegeLevel
impl Unpin for PrivilegeLevel
impl UnwindSafe for PrivilegeLevel
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more