Struct IvrsHeader 

#[repr(C, packed(1))]
pub struct IvrsHeader {
    pub header: Sdt,
    pub ivinfo: u16,
    pub _reserved1: u8,
    pub flags: u8,
    pub total_length: u16,
    pub dev_entry_count: u16,
    pub entry_offset: u16,
}

Fixed header of the IVRS ACPI table (AMD IOMMU).

Fields

header: Sdt

ivinfo: u16

Virtualisation information.

_reserved1: u8

flags: u8

Flags: bit 0 = Draint, bit 1 = Coherent.

total_length: u16

Total length of the IVRS table including all IVHD/IVMD blocks.

dev_entry_count: u16

Number of device entries across all IVHD blocks.

entry_offset: u16

Byte offset from the start of the table to the first IVHD/IVMD entry.

Implementations

impl IvrsHeader

pub fn get() -> Option<&'static Self>

Locate and return the IVRS table from ACPI.

pub fn has_draint(&self) -> bool

Check whether the Draint flag is set (all devices behind IOMMU).

pub fn is_coherent(&self) -> bool

Check whether the Coherent flag is set (I/O coherent).

pub fn ivhd_ivmd_count(&self) -> usize

Return the number of IVHD/IVMD entries.

pub fn entries(&self) -> IvrsEntryIter<'_>

Iterate over all IVHD/IVMD blocks and device entries within IVHD blocks.

Trait Implementations

impl Clone for IvrsHeader

fn clone(&self) -> IvrsHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for IvrsHeader

impl Debug for IvrsHeader

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

Formats the value using the given formatter.

impl FromBytes for IvrsHeader

where Sdt: FromBytes, u16: FromBytes, u8: FromBytes,

fn read_from_bytes(source: &[u8]) -> Result<Self, SizeError<&[u8], Self>>

where Self: Sized,

Reads a copy of Self from the given source.

fn read_from_prefix( source: &[u8], ) -> Result<(Self, &[u8]), SizeError<&[u8], Self>>

where Self: Sized,

Reads a copy of Self from the prefix of the given source.

fn read_from_suffix( source: &[u8], ) -> Result<(&[u8], Self), SizeError<&[u8], Self>>

where Self: Sized,

Reads a copy of Self from the suffix of the given source.

impl FromZeros for IvrsHeader

where Sdt: FromZeros, u16: FromZeros, u8: FromZeros,

fn zero(&mut self)

Overwrites self with zeros.

fn new_zeroed() -> Self

where Self: Sized,

Creates an instance of Self from zeroed bytes.

impl TryFromBytes for IvrsHeader

where Sdt: TryFromBytes, u16: TryFromBytes, u8: TryFromBytes,

fn try_read_from_bytes( source: &[u8], ) -> Result<Self, ConvertError<Infallible, SizeError<&[u8], Self>, ValidityError<&[u8], Self>>>

where Self: Sized,

Attempts to read the given source as a Self.

fn try_read_from_prefix( source: &[u8], ) -> Result<(Self, &[u8]), ConvertError<Infallible, SizeError<&[u8], Self>, ValidityError<&[u8], Self>>>

where Self: Sized,

Attempts to read a Self from the prefix of the given source.

fn try_read_from_suffix( source: &[u8], ) -> Result<(&[u8], Self), ConvertError<Infallible, SizeError<&[u8], Self>, ValidityError<&[u8], Self>>>

where Self: Sized,

Attempts to read a Self from the suffix of the given source.