Struct vmm_vhost::message::QueueRegionPacked

#[repr(C, packed(1))]
pub struct QueueRegionPacked {
    pub features: u64,
    pub version: u16,
    pub desc_num: u16,
    pub free_head: u16,
    pub old_free_head: u16,
    pub used_idx: u16,
    pub old_used_idx: u16,
    pub used_wrap_counter: u8,
    pub old_used_wrap_counter: u8,
    padding: [u8; 7],
    pub desc: u64,
}

Inflight I/O queue region for packed virtqueues

Fields

features: u64

Features flags of this region

version: u16

version of this region

desc_num: u16

size of descriptor state array

free_head: u16

head of free DescStatePacked entry list

old_free_head: u16

old head of free DescStatePacked entry list

used_idx: u16

used idx of descriptor ring

old_used_idx: u16

old used idx of descriptor ring

used_wrap_counter: u8

device ring wrap counter

old_used_wrap_counter: u8

old device ring wrap counter

padding: [u8; 7]

Padding

desc: u64

Pointer to array tracking state of each descriptor from descriptor ring

Implementations

impl QueueRegionPacked

pub fn new(features: u64, queue_size: u16) -> Self

New instance of QueueRegionPacked struct