Struct DeviceCtx 

pub struct DeviceCtx {
    pub mem: Arc<GuestMemWriter>,
    pub raise_irq: Arc<dyn Fn(u32) + Send + Sync>,
}

Per-device context shared between the VMM and each VirtioDevice for accessing guest physical memory and injecting interrupts.

Every device that needs to read descriptors, write completions to device-owned buffers, or raise a VirtIO used-ring / config-change interrupt holds a DeviceCtx. Construction happens inside the VMM at device-registration time, so by the time guest I/O begins both fields are populated — devices store this by value (no Option).

mem is a shared-lifetime accessor over the single guest RAM mmap. raise_irq is pre-bound to the device’s GSI and MMIO state; the only argument is the interrupt reason (INT_VRING = 1 for used-ring notifications, INT_CONFIG = 2 for config-space changes).

Fields

mem: Arc<GuestMemWriter>

Guest physical memory accessor.

raise_irq: Arc<dyn Fn(u32) + Send + Sync>

Pre-bound interrupt trigger: updates the device’s MMIO interrupt_status register and then asserts the device’s GSI on the platform IRQ chip.

Trait Implementations

impl Clone for DeviceCtx

fn clone(&self) -> DeviceCtx

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DeviceCtx

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

Formats the value using the given formatter.