Struct x86_64::registers::control::Cr4Flags

pub struct Cr4Flags { /* fields omitted */ }

Configuration flags of the Cr4 register.

Implementations

impl Cr4Flags

pub const VIRTUAL_8086_MODE_EXTENSIONS: Cr4Flags

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

pub const PROTECTED_MODE_VIRTUAL_INTERRUPTS: Cr4Flags

Enables support for protected-mode virtual interrupts.

pub const TIMESTAMP_DISABLE: Cr4Flags

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

pub const DEBUGGING_EXTENSIONS: Cr4Flags

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

pub const PAGE_SIZE_EXTENSION: Cr4Flags

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: Cr4Flags

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

pub const MACHINE_CHECK_EXCEPTION: Cr4Flags

Enables the machine-check exception mechanism.

pub const PAGE_GLOBAL: Cr4Flags

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

pub const PERFORMANCE_MONITOR_COUNTER: Cr4Flags

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

pub const OSFXSR: Cr4Flags

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

pub const OSXMMEXCPT_ENABLE: Cr4Flags

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: Cr4Flags

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

pub const L5_PAGING: Cr4Flags

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

pub const VIRTUAL_MACHINE_EXTENSIONS: Cr4Flags

Enables VMX instructions (Intel Only).

pub const SAFER_MODE_EXTENSIONS: Cr4Flags

Enables SMX instructions (Intel Only).

pub const FSGSBASE: Cr4Flags

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: Cr4Flags

Enables process-context identifiers (PCIDs).

pub const OSXSAVE: Cr4Flags

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

pub const KEY_LOCKER: Cr4Flags

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: Cr4Flags

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: Cr4Flags

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

pub const PROTECTION_KEY: Cr4Flags

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: Cr4Flags

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: Cr4Flags

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

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

pub const fn empty() -> Cr4Flags

Returns an empty set of flags

pub const fn all() -> Cr4Flags

Returns the set containing all flags.

pub const fn bits(&self) -> u64

Returns the raw value of the flags currently stored.

pub fn from_bits(bits: u64) -> Option<Cr4Flags>

Convert from underlying bit representation, unless that representation contains bits that do not correspond to a flag.

pub const fn from_bits_truncate(bits: u64) -> Cr4Flags

Convert from underlying bit representation, dropping any bits that do not correspond to flags.

pub const unsafe fn from_bits_unchecked(bits: u64) -> Cr4Flags

Convert from underlying bit representation, preserving all bits (even those not corresponding to a defined flag).

pub const fn is_empty(&self) -> bool

Returns true if no flags are currently stored.

pub const fn is_all(&self) -> bool

Returns true if all flags are currently set.

pub const fn intersects(&self, other: Cr4Flags) -> bool

Returns true if there are flags common to both self and other.

pub const fn contains(&self, other: Cr4Flags) -> bool

Returns true all of the flags in other are contained within self.

pub fn insert(&mut self, other: Cr4Flags)

Inserts the specified flags in-place.

pub fn remove(&mut self, other: Cr4Flags)

Removes the specified flags in-place.

pub fn toggle(&mut self, other: Cr4Flags)

Toggles the specified flags in-place.

pub fn set(&mut self, other: Cr4Flags, value: bool)

Inserts or removes the specified flags depending on the passed value.

Trait Implementations

impl Binary for Cr4Flags

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

Formats the value using the given formatter.

impl BitAnd<Cr4Flags> for Cr4Flags

fn bitand(self, other: Cr4Flags) -> Cr4Flags

Returns the intersection between the two sets of flags.

type Output = Cr4Flags

The resulting type after applying the & operator.

impl BitAndAssign<Cr4Flags> for Cr4Flags

fn bitand_assign(&mut self, other: Cr4Flags)

Disables all flags disabled in the set.

impl BitOr<Cr4Flags> for Cr4Flags

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

Returns the union of the two sets of flags.

type Output = Cr4Flags

The resulting type after applying the | operator.

impl BitOrAssign<Cr4Flags> for Cr4Flags

fn bitor_assign(&mut self, other: Cr4Flags)

Adds the set of flags.

impl BitXor<Cr4Flags> for Cr4Flags

fn bitxor(self, other: Cr4Flags) -> Cr4Flags

Returns the left flags, but with all the right flags toggled.

type Output = Cr4Flags

The resulting type after applying the ^ operator.

impl BitXorAssign<Cr4Flags> for Cr4Flags

fn bitxor_assign(&mut self, other: Cr4Flags)

Toggles the set of flags.

impl Clone for Cr4Flags

fn clone(&self) -> Cr4Flags

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Cr4Flags

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

Formats the value using the given formatter.

impl Extend<Cr4Flags> for Cr4Flags

fn extend<T: IntoIterator<Item = Cr4Flags>>(&mut self, iterator: T)

Extends a collection with the contents of an iterator.

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 FromIterator<Cr4Flags> for Cr4Flags

fn from_iter<T: IntoIterator<Item = Cr4Flags>>(iterator: T) -> Cr4Flags

Creates a value from an iterator.

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, 

Feeds a slice of this type into the given Hasher.

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) -> Cr4Flags

Returns the complement of this set of flags.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl PartialEq<Cr4Flags> for Cr4Flags

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

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

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

This method tests for !=.

impl PartialOrd<Cr4Flags> 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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

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

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

impl Sub<Cr4Flags> for Cr4Flags

fn sub(self, other: Cr4Flags) -> Cr4Flags

Returns the set difference of the two sets of flags.

type Output = Cr4Flags

The resulting type after applying the - operator.

impl SubAssign<Cr4Flags> for Cr4Flags

fn sub_assign(&mut self, other: Cr4Flags)

Disables all flags enabled in the set.

impl UpperHex for Cr4Flags

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

Formats the value using the given formatter.

impl Copy for Cr4Flags

impl Eq for Cr4Flags

impl StructuralEq for Cr4Flags

impl StructuralPartialEq for Cr4Flags