Struct GuestAddress 

pub struct GuestAddress(pub u64);

Represents a guest physical address (GPA).

Notes:

On ARM64, a 32-bit hypervisor may be used to support a 64-bit guest. For simplicity, u64 is used to store the the raw value no matter if the guest a 32-bit or 64-bit virtual machine.

Tuple Fields

0: u64

Trait Implementations

impl Address for GuestAddress

fn new(value: u64) -> GuestAddress

Creates an address from a raw address value.

fn raw_value(&self) -> u64

Returns the raw value of the address.

fn checked_offset_from(&self, base: GuestAddress) -> Option<u64>

Computes the offset from this address to the given base address.

fn checked_add(&self, other: u64) -> Option<GuestAddress>

Computes self + other, returning None if overflow occurred.

fn overflowing_add(&self, other: u64) -> (GuestAddress, bool)

Computes self + other.

fn unchecked_add(&self, offset: u64) -> GuestAddress

Computes self + offset.

fn checked_sub(&self, other: u64) -> Option<GuestAddress>

Subtracts two addresses, checking for underflow. If underflow happens, None is returned.

fn overflowing_sub(&self, other: u64) -> (GuestAddress, bool)

Computes self - other.

fn unchecked_sub(&self, other: u64) -> GuestAddress

Computes self - other.

fn mask(&self, mask: Self::V) -> Self::V

Returns the bitwise and of the address with the given mask.

fn unchecked_offset_from(&self, base: Self) -> Self::V

Computes the offset from this address to the given base address.

fn checked_align_up(&self, power_of_two: Self::V) -> Option<Self>

Returns self, aligned to the given power of two.

fn unchecked_align_up(&self, power_of_two: Self::V) -> Self

Returns self, aligned to the given power of two. Only use this when the result is guaranteed not to overflow.

impl AddressValue for GuestAddress

type V = u64

Type of the raw address value.

fn zero() -> Self::V

Return the value zero, coerced into the value type Self::V

fn one() -> Self::V

Return the value zero, coerced into the value type Self::V

impl BitAnd<u64> for GuestAddress

type Output = GuestAddress

The resulting type after applying the & operator.

fn bitand(self, other: u64) -> GuestAddress

Performs the & operation.

impl BitOr<u64> for GuestAddress

type Output = GuestAddress

The resulting type after applying the | operator.

fn bitor(self, other: u64) -> GuestAddress

Performs the | operation.

impl<T> Bytes<GuestAddress> for T

where T: GuestMemory + ?Sized,

fn write_slice(&self, buf: &[u8], addr: GuestAddress) -> Result<(), Error>

Examples

• Write a slice at guestaddress 0x1000. (uses the backend-mmap feature)

gm.write_slice(&[1, 2, 3, 4, 5], start_addr)
    .expect("Could not write slice to guest memory");

fn read_slice(&self, buf: &mut [u8], addr: GuestAddress) -> Result<(), Error>

Examples

• Read a slice of length 16 at guestaddress 0x1000. (uses the backend-mmap feature)

let start_addr = GuestAddress(0x1000);
let mut gm = GuestMemoryMmap::<()>::from_ranges(&vec![(start_addr, 0x400)])
    .expect("Could not create guest memory");
let buf = &mut [0u8; 16];

gm.read_slice(buf, start_addr)
    .expect("Could not read slice from guest memory");

type E = Error

Associated error codes

fn write(&self, buf: &[u8], addr: GuestAddress) -> Result<usize, Error>

Writes a slice into the container at addr.

fn read(&self, buf: &mut [u8], addr: GuestAddress) -> Result<usize, Error>

Reads data from the container at addr into a slice.

fn read_volatile_from<F>( &self, addr: GuestAddress, src: &mut F, count: usize, ) -> Result<usize, Error>

where F: ReadVolatile,

Reads up to count bytes from src and writes them into the container at addr. Unlike VolatileRead::read_volatile, this function retries on EINTR being returned from the underlying I/O read operation.

fn read_exact_volatile_from<F>( &self, addr: GuestAddress, src: &mut F, count: usize, ) -> Result<(), Error>

where F: ReadVolatile,

Reads exactly count bytes from an object and writes them into the container at addr.

fn write_volatile_to<F>( &self, addr: GuestAddress, dst: &mut F, count: usize, ) -> Result<usize, Error>

where F: WriteVolatile,

Reads up to count bytes from the container at addr and writes them into dst. Unlike VolatileWrite::write_volatile, this function retries on EINTR being returned by the underlying I/O write operation.

fn write_all_volatile_to<F>( &self, addr: GuestAddress, dst: &mut F, count: usize, ) -> Result<(), Error>

where F: WriteVolatile,

Reads exactly count bytes from the container at addr and writes them into an object.

fn store<O>( &self, val: O, addr: GuestAddress, order: Ordering, ) -> Result<(), Error>

where O: AtomicAccess,

Atomically store a value at the specified address.

fn load<O>(&self, addr: GuestAddress, order: Ordering) -> Result<O, Error>

where O: AtomicAccess,

Atomically load a value from the specified address.

fn write_obj<T>(&self, val: T, addr: A) -> Result<(), Self::E>

where T: ByteValued,

Writes an object into the container at addr.

fn read_obj<T>(&self, addr: A) -> Result<T, Self::E>

where T: ByteValued,

Reads an object from the container at addr.

impl Clone for GuestAddress

fn clone(&self) -> GuestAddress

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GuestAddress

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

Formats the value using the given formatter.

impl Default for GuestAddress

fn default() -> GuestAddress

Returns the “default value” for a type.

impl Ord for GuestAddress

fn cmp(&self, other: &GuestAddress) -> 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 GuestAddress

fn eq(&self, other: &GuestAddress) -> 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 PartialOrd for GuestAddress

fn partial_cmp(&self, other: &GuestAddress) -> 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 Copy for GuestAddress

impl Eq for GuestAddress

impl StructuralPartialEq for GuestAddress