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3bd47ffdc1
Both GIC and IOAPIC must implement a new method notifier() in order to provide the caller with an EventFd corresponding to the IRQ it refers to. This is needed in anticipation for supporting INTx with VFIO PCI devices. Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
62 lines
1.8 KiB
Rust
62 lines
1.8 KiB
Rust
// Copyright 2020, ARM Limited.
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//
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// SPDX-License-Identifier: Apache-2.0 AND BSD-3-Clause
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use std::io;
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use std::result;
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use vmm_sys_util::eventfd::EventFd;
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#[derive(Debug)]
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pub enum Error {
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/// Invalid trigger mode.
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InvalidTriggerMode,
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/// Invalid delivery mode.
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InvalidDeliveryMode,
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/// Failed creating the interrupt source group.
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CreateInterruptSourceGroup(io::Error),
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/// Failed triggering the interrupt.
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TriggerInterrupt(io::Error),
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/// Failed masking the interrupt.
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MaskInterrupt(io::Error),
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/// Failed unmasking the interrupt.
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UnmaskInterrupt(io::Error),
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/// Failed updating the interrupt.
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UpdateInterrupt(io::Error),
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/// Failed enabling the interrupt.
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EnableInterrupt(io::Error),
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}
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type Result<T> = result::Result<T, Error>;
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pub struct MsiMessage {
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// Message Address Register
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// 31-20: Base address. Fixed value (0x0FEE)
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// 19-12: Destination ID
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// 11-4: Reserved
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// 3: Redirection Hint indication
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// 2: Destination Mode
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// 1-0: Reserved
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pub addr: u32,
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// Message Data Register
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// 32-16: Reserved
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// 15: Trigger Mode. 0 = Edge, 1 = Level
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// 14: Level. 0 = Deassert, 1 = Assert
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// 13-11: Reserved
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// 10-8: Delivery Mode
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// 7-0: Vector
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pub data: u32,
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}
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// Introduce trait InterruptController to uniform the interrupt
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// service provided for devices.
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// Device manager uses this trait without caring whether it is a
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// IOAPIC (X86) or GIC (Arm).
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pub trait InterruptController: Send {
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fn service_irq(&mut self, irq: usize) -> Result<()>;
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#[cfg(target_arch = "aarch64")]
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fn enable(&self) -> Result<()>;
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#[cfg(target_arch = "x86_64")]
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fn end_of_interrupt(&mut self, vec: u8);
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fn notifier(&self, irq: usize) -> Option<EventFd>;
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}
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