cloud-hypervisor/devices/src/interrupt_controller.rs

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// Copyright 2020, ARM Limited.
//
// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
use std::io;
use std::result;
use vmm_sys_util::eventfd::EventFd;
#[derive(Debug)]
pub enum Error {
/// Invalid trigger mode.
InvalidTriggerMode,
/// Invalid delivery mode.
InvalidDeliveryMode,
/// Failed creating the interrupt source group.
CreateInterruptSourceGroup(io::Error),
/// Failed triggering the interrupt.
TriggerInterrupt(io::Error),
/// Failed masking the interrupt.
MaskInterrupt(io::Error),
/// Failed unmasking the interrupt.
UnmaskInterrupt(io::Error),
/// Failed updating the interrupt.
UpdateInterrupt(io::Error),
/// Failed enabling the interrupt.
EnableInterrupt(io::Error),
#[cfg(target_arch = "aarch64")]
/// Failed creating GIC device.
CreateGic(hypervisor::HypervisorVmError),
#[cfg(target_arch = "aarch64")]
/// Failed restoring GIC device.
RestoreGic(hypervisor::arch::aarch64::gic::Error),
}
type Result<T> = result::Result<T, Error>;
pub struct MsiMessage {
// Message Address Register
// 31-20: Base address. Fixed value (0x0FEE)
// 19-12: Destination ID
// 11-4: Reserved
// 3: Redirection Hint indication
// 2: Destination Mode
// 1-0: Reserved
pub addr: u32,
// Message Data Register
// 32-16: Reserved
// 15: Trigger Mode. 0 = Edge, 1 = Level
// 14: Level. 0 = Deassert, 1 = Assert
// 13-11: Reserved
// 10-8: Delivery Mode
// 7-0: Vector
pub data: u32,
}
// Introduce trait InterruptController to uniform the interrupt
// service provided for devices.
// Device manager uses this trait without caring whether it is a
// IOAPIC (X86) or GIC (Arm).
pub trait InterruptController: Send {
fn service_irq(&mut self, irq: usize) -> Result<()>;
#[cfg(target_arch = "x86_64")]
fn end_of_interrupt(&mut self, vec: u8);
fn notifier(&self, irq: usize) -> Option<EventFd>;
}