Struct Cr4Flags 

pub struct Cr4Flags(/* private fields */);

Configuration flags of the Cr4 register.

Implementations

impl Cr4Flags

pub const VIRTUAL_8086_MODE_EXTENSIONS: Self

Enables hardware-supported performance enhancements for software running in virtual-8086 mode.

pub const PROTECTED_MODE_VIRTUAL_INTERRUPTS: Self

Enables support for protected-mode virtual interrupts.

pub const TIMESTAMP_DISABLE: Self

When set, only privilege-level 0 can execute the RDTSC or RDTSCP instructions.

pub const DEBUGGING_EXTENSIONS: Self

Enables I/O breakpoint capability and enforces treatment of DR4 and DR5 registers as reserved.

pub const PAGE_SIZE_EXTENSION: Self

Enables the use of 4MB physical frames; ignored if PHYSICAL_ADDRESS_EXTENSION is set (so always ignored in long mode).

pub const PHYSICAL_ADDRESS_EXTENSION: Self

Enables physical address extensions and 2MB physical frames. Required in long mode.

pub const MACHINE_CHECK_EXCEPTION: Self

Enables the machine-check exception mechanism.

pub const PAGE_GLOBAL: Self

Enables the global page feature, allowing some page translations to be marked as global (see [PageTableFlags::GLOBAL]).

pub const PERFORMANCE_MONITOR_COUNTER: Self

Allows software running at any privilege level to use the RDPMC instruction.

pub const OSFXSR: Self

Enables the use of legacy SSE instructions; allows using FXSAVE/FXRSTOR for saving processor state of 128-bit media instructions.

pub const OSXMMEXCPT_ENABLE: Self

Enables the SIMD floating-point exception (#XF) for handling unmasked 256-bit and 128-bit media floating-point errors.

pub const USER_MODE_INSTRUCTION_PREVENTION: Self

Prevents the execution of the SGDT, SIDT, SLDT, SMSW, and STR instructions by user-mode software.

pub const L5_PAGING: Self

Enables 5-level paging on supported CPUs (Intel Only).

pub const VIRTUAL_MACHINE_EXTENSIONS: Self

Enables VMX instructions (Intel Only).

pub const SAFER_MODE_EXTENSIONS: Self

Enables SMX instructions (Intel Only).

pub const FSGSBASE: Self

Enables software running in 64-bit mode at any privilege level to read and write the FS.base and GS.base hidden segment register state.

pub const PCID: Self

Enables process-context identifiers (PCIDs).

pub const OSXSAVE: Self

Enables extended processor state management instructions, including XGETBV and XSAVE.

pub const KEY_LOCKER: Self

Enables the Key Locker feature (Intel Only).

This enables creation and use of opaque AES key handles; see the Intel Key Locker Specification for more information.

pub const SUPERVISOR_MODE_EXECUTION_PROTECTION: Self

Prevents the execution of instructions that reside in pages accessible by user-mode software when the processor is in supervisor-mode.

pub const SUPERVISOR_MODE_ACCESS_PREVENTION: Self

Enables restrictions for supervisor-mode software when reading data from user-mode pages.

pub const PROTECTION_KEY_USER: Self

Enables protection keys for user-mode pages.

Also enables access to the PKRU register (via the RDPKRU/WRPKRU instructions) to set user-mode protection key access controls.

pub const CONTROL_FLOW_ENFORCEMENT: Self

Enables Control-flow Enforcement Technology (CET)

This enables the shadow stack feature, ensuring return addresses read via RET and IRET have not been corrupted.

pub const PROTECTION_KEY_SUPERVISOR: Self

Enables protection keys for supervisor-mode pages (Intel Only).

Also enables the IA32_PKRS MSR to set supervisor-mode protection key access controls.

impl Cr4Flags

pub const fn empty() -> Self

Get a flags value with all bits unset.

pub const fn all() -> Self

Get a flags value with all known bits set.

pub const fn bits(&self) -> u64

Get the underlying bits value.

The returned value is exactly the bits set in this flags value.

pub const fn from_bits(bits: u64) -> Option<Self>

Convert from a bits value.

This method will return None if any unknown bits are set.

pub const fn from_bits_truncate(bits: u64) -> Self

Convert from a bits value, unsetting any unknown bits.

pub const fn from_bits_retain(bits: u64) -> Self

Convert from a bits value exactly.

pub fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set.

This method will return None if name is empty or doesn’t correspond to any named flag.

pub const fn is_empty(&self) -> bool

Whether all bits in self are unset.

pub const fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

pub const fn intersects(&self, other: Self) -> bool

Whether any set bits in other are also set in self.

pub const fn contains(&self, other: Self) -> bool

Whether all set bits in other are also set in self.

pub fn insert(&mut self, other: Self)

The bitwise or (|) of the bits in self and other.

pub fn remove(&mut self, other: Self)

The intersection of self with the complement of other (&!).

This method is not equivalent to self & !other when other has unknown bits set. remove won’t truncate other, but the ! operator will.

pub fn toggle(&mut self, other: Self)

The bitwise exclusive-or (^) of the bits in self and other.

pub fn set(&mut self, other: Self, value: bool)

Call insert when value is true or remove when value is false.

pub const fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in self and other.

pub const fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in self and other.

pub const fn difference(self, other: Self) -> Self

The intersection of self with the complement of other (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

pub const fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in self and other.

pub const fn complement(self) -> Self

The bitwise negation (!) of the bits in self, truncating the result.

impl Cr4Flags

pub const fn iter(&self) -> Iter<Cr4Flags>

Yield a set of contained flags values.

Each yielded flags value will correspond to a defined named flag. Any unknown bits will be yielded together as a final flags value.

pub const fn iter_names(&self) -> IterNames<Cr4Flags>

Yield a set of contained named flags values.

This method is like iter, except only yields bits in contained named flags. Any unknown bits, or bits not corresponding to a contained flag will not be yielded.

Trait Implementations

impl Binary for Cr4Flags

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

Formats the value using the given formatter.

impl BitAnd for Cr4Flags

fn bitand(self, other: Self) -> Self

The bitwise and (&) of the bits in self and other.

type Output = Cr4Flags

The resulting type after applying the & operator.

impl BitAndAssign for Cr4Flags

fn bitand_assign(&mut self, other: Self)

The bitwise and (&) of the bits in self and other.

impl BitOr for Cr4Flags

fn bitor(self, other: Cr4Flags) -> Self

The bitwise or (|) of the bits in self and other.

type Output = Cr4Flags

The resulting type after applying the | operator.

impl BitOrAssign for Cr4Flags

fn bitor_assign(&mut self, other: Self)

The bitwise or (|) of the bits in self and other.

impl BitXor for Cr4Flags

fn bitxor(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in self and other.

type Output = Cr4Flags

The resulting type after applying the ^ operator.

impl BitXorAssign for Cr4Flags

fn bitxor_assign(&mut self, other: Self)

The bitwise exclusive-or (^) of the bits in self and other.

impl Clone for Cr4Flags

fn clone(&self) -> Cr4Flags

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Cr4Flags

impl Debug for Cr4Flags

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

Formats the value using the given formatter.

impl Eq for Cr4Flags

impl Extend<Cr4Flags> for Cr4Flags

fn extend<T: IntoIterator<Item = Self>>(&mut self, iterator: T)

The bitwise or (|) of the bits in each flags value.

fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)

Extends a collection with exactly one element.

fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)

Reserves capacity in a collection for the given number of additional elements.

impl Flags for Cr4Flags

const FLAGS: &'static [Flag<Cr4Flags>]

The set of defined flags.

type Bits = u64

The underlying bits type.

fn bits(&self) -> u64

Get the underlying bits value.

fn from_bits_retain(bits: u64) -> Cr4Flags

Convert from a bits value exactly.

fn all_named() -> Cr4Flags

Get a flags value with all bits from named flags set.

fn empty() -> Self

Get a flags value with all bits unset.

fn all() -> Self

Get a flags value with all known bits set.

fn known_bits(&self) -> Self::Bits

Get the known bits from a flags value.

fn unknown_bits(&self) -> Self::Bits

Get the unknown bits from a flags value.

fn contains_unknown_bits(&self) -> bool

This method will return true if any unknown bits are set.

fn from_bits(bits: Self::Bits) -> Option<Self>

Convert from a bits value.

fn from_bits_truncate(bits: Self::Bits) -> Self

Convert from a bits value, unsetting any unknown bits.

fn from_name(name: &str) -> Option<Self>

Get a flags value with the bits of a flag with the given name set.

fn iter(&self) -> Iter<Self>

Yield a set of contained flags values.

fn iter_names(&self) -> IterNames<Self>

Yield a set of contained named flags values.

fn iter_defined_names() -> IterDefinedNames<Self>

Yield a set of all named flags defined by Self::FLAGS.

fn iter_equal_names(&self) -> IterEqualNames<Self>

Get an iterator over all defined names for this flags value.

fn is_empty(&self) -> bool

Whether all bits in this flags value are unset.

fn is_all(&self) -> bool

Whether all known bits in this flags value are set.

fn intersects(&self, other: Self) -> bool

where Self: Sized,

Whether any set bits in other are also set in self.

fn contains(&self, other: Self) -> bool

where Self: Sized,

Whether all set bits in other are also set in self.

fn truncate(&mut self)

where Self: Sized,

Remove any unknown bits from the flags.

fn insert(&mut self, other: Self)

where Self: Sized,

The bitwise or (|) of the bits in self and other.

fn remove(&mut self, other: Self)

where Self: Sized,

The intersection of self with the complement of other (&!).

fn toggle(&mut self, other: Self)

where Self: Sized,

The bitwise exclusive-or (^) of the bits in self and other.

fn set(&mut self, other: Self, value: bool)

where Self: Sized,

Call Flags::insert when value is true or Flags::remove when value is false.

fn clear(&mut self)

where Self: Sized,

Unsets all bits in the flags.

fn intersection(self, other: Self) -> Self

The bitwise and (&) of the bits in self and other.

fn union(self, other: Self) -> Self

The bitwise or (|) of the bits in self and other.

fn difference(self, other: Self) -> Self

The intersection of self with the complement of other (&!).

fn symmetric_difference(self, other: Self) -> Self

The bitwise exclusive-or (^) of the bits in self and other.

fn complement(self) -> Self

The bitwise negation (!) of the bits in self, truncating the result.

impl FromIterator<Cr4Flags> for Cr4Flags

fn from_iter<T: IntoIterator<Item = Self>>(iterator: T) -> Self

The bitwise or (|) of the bits in each flags value.

impl Hash for Cr4Flags

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 IntoIterator for Cr4Flags

type Item = Cr4Flags

The type of the elements being iterated over.

type IntoIter = Iter<Cr4Flags>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl LowerHex for Cr4Flags

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

Formats the value using the given formatter.

impl Not for Cr4Flags

fn not(self) -> Self

The bitwise negation (!) of the bits in self, truncating the result.

type Output = Cr4Flags

The resulting type after applying the ! operator.

impl Octal for Cr4Flags

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

Formats the value using the given formatter.

impl Ord for Cr4Flags

fn cmp(&self, other: &Cr4Flags) -> Ordering

This method returns an [Ordering] between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Cr4Flags

fn eq(&self, other: &Cr4Flags) -> bool

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for Cr4Flags

fn partial_cmp(&self, other: &Cr4Flags) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl PublicFlags for Cr4Flags

type Primitive = u64

The type of the underlying storage.

type Internal = InternalBitFlags

The type of the internal field on the generated flags type.

impl StructuralPartialEq for Cr4Flags

impl Sub for Cr4Flags

fn sub(self, other: Self) -> Self

The intersection of self with the complement of other (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

type Output = Cr4Flags

The resulting type after applying the - operator.

impl SubAssign for Cr4Flags

fn sub_assign(&mut self, other: Self)

The intersection of self with the complement of other (&!).

This method is not equivalent to self & !other when other has unknown bits set. difference won’t truncate other, but the ! operator will.

impl UpperHex for Cr4Flags

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

Formats the value using the given formatter.