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Remove the previously hardcoded IRQ number used for the GED device. Instead allocate the IRQ using the allocator and use that value in the definition in the ACPI device. Signed-off-by: Rob Bradford <robert.bradford@intel.com>
95 lines
2.7 KiB
Rust
95 lines
2.7 KiB
Rust
// Copyright © 2019 Intel Corporation
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//
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// SPDX-License-Identifier: Apache-2.0
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//
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use vmm_sys_util::eventfd::EventFd;
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use BusDevice;
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use HotPlugNotificationType;
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use Interrupt;
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/// A device for handling ACPI shutdown and reboot
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pub struct AcpiShutdownDevice {
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exit_evt: EventFd,
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reset_evt: EventFd,
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}
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impl AcpiShutdownDevice {
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/// Constructs a device that will signal the given event when the guest requests it.
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pub fn new(exit_evt: EventFd, reset_evt: EventFd) -> AcpiShutdownDevice {
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AcpiShutdownDevice {
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exit_evt,
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reset_evt,
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}
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}
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}
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// Same I/O port used for shutdown and reboot
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impl BusDevice for AcpiShutdownDevice {
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// Spec has all fields as zero
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fn read(&mut self, _base: u64, _offset: u64, data: &mut [u8]) {
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for i in data.iter_mut() {
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*i = 0;
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}
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}
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fn write(&mut self, _base: u64, _offset: u64, data: &[u8]) {
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if data[0] == 1 {
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debug!("ACPI Reboot signalled");
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if let Err(e) = self.reset_evt.write(1) {
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error!("Error triggering ACPI reset event: {}", e);
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}
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}
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// The ACPI DSDT table specifies the S5 sleep state (shutdown) as value 5
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const S5_SLEEP_VALUE: u8 = 5;
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const SLEEP_STATUS_EN_BIT: u8 = 5;
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const SLEEP_VALUE_BIT: u8 = 2;
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if data[0] == (S5_SLEEP_VALUE << SLEEP_VALUE_BIT) | (1 << SLEEP_STATUS_EN_BIT) {
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debug!("ACPI Shutdown signalled");
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if let Err(e) = self.exit_evt.write(1) {
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error!("Error triggering ACPI shutdown event: {}", e);
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}
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}
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}
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}
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/// A device for handling ACPI GED event generation
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pub struct AcpiGEDDevice {
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interrupt: Box<dyn Interrupt>,
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notification_type: HotPlugNotificationType,
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ged_irq: u32,
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}
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impl AcpiGEDDevice {
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pub fn new(interrupt: Box<dyn Interrupt>, ged_irq: u32) -> AcpiGEDDevice {
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AcpiGEDDevice {
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interrupt,
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notification_type: HotPlugNotificationType::NoDevicesChanged,
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ged_irq,
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}
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}
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pub fn notify(
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&mut self,
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notification_type: HotPlugNotificationType,
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) -> Result<(), std::io::Error> {
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self.notification_type = notification_type;
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self.interrupt.deliver()
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}
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pub fn irq(&self) -> u32 {
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self.ged_irq
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}
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}
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// I/O port reports what type of notification was made
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impl BusDevice for AcpiGEDDevice {
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// Spec has all fields as zero
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fn read(&mut self, _base: u64, _offset: u64, data: &mut [u8]) {
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data[0] = self.notification_type as u8;
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self.notification_type = HotPlugNotificationType::NoDevicesChanged;
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}
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fn write(&mut self, _base: u64, _offset: u64, _data: &[u8]) {}
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}
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