virtio-drivers/src/device/common.rs

//! Common part shared across all the devices.

use bitflags::bitflags;

bitflags! {
    pub(crate) struct Feature: u64 {
        // device independent
        const NOTIFY_ON_EMPTY       = 1 << 24; // legacy
        const ANY_LAYOUT            = 1 << 27; // legacy
        const RING_INDIRECT_DESC    = 1 << 28;
        const RING_EVENT_IDX        = 1 << 29;
        const UNUSED                = 1 << 30; // legacy
        const VERSION_1             = 1 << 32; // detect legacy

        // since virtio v1.1
        const ACCESS_PLATFORM       = 1 << 33;
        const RING_PACKED           = 1 << 34;
        const IN_ORDER              = 1 << 35;
        const ORDER_PLATFORM        = 1 << 36;
        const SR_IOV                = 1 << 37;
        const NOTIFICATION_DATA     = 1 << 38;
    }
}