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vmm: acpi: Add notification method for PCI device slots

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Adds the DVNT method to the PCI0 device in the DSDT table. This new
method is responsible for checking each slot and notify the guest OS if
one of the slots is supposed to be added or removed.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf 2020-02-26 16:35:15 +01:00 committed by Rob Bradford
parent 5a68d5b6a7
commit c3a0685e2d
1 changed files with 45 additions and 1 deletions
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46
vmm/src/device_manager.rs
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@ -1588,6 +1588,48 @@ impl Aml for PciDevSlot {
}
}
#[cfg(feature = "acpi")]
struct PciDevSlotNotify {
device_id: u8,
}
#[cfg(feature = "acpi")]
impl Aml for PciDevSlotNotify {
fn to_aml_bytes(&self) -> Vec<u8> {
let device_id_mask: u32 = 1 << self.device_id;
let object = aml::Path::new(&format!("S{:03}", self.device_id));
let mut bytes = aml::And::new(&aml::Local(0), &aml::Arg(0), &device_id_mask).to_aml_bytes();
bytes.extend_from_slice(
&aml::If::new(
&aml::Equal::new(&aml::Local(0), &device_id_mask),
vec![&aml::Notify::new(&object, &aml::Arg(1))],
)
.to_aml_bytes(),
);
bytes
}
}
#[cfg(feature = "acpi")]
struct PciDevSlotMethods {}
#[cfg(feature = "acpi")]
impl Aml for PciDevSlotMethods {
fn to_aml_bytes(&self) -> Vec<u8> {
let mut device_notifies = Vec::new();
for device_id in 0..32 {
device_notifies.push(PciDevSlotNotify { device_id });
}
let mut device_notifies_refs: Vec<&dyn aml::Aml> = Vec::new();
for device_notify in device_notifies.iter() {
device_notifies_refs.push(device_notify);
}
aml::Method::new("DVNT".into(), 2, true, device_notifies_refs).to_aml_bytes()
}
}
#[cfg(feature = "acpi")]
impl Aml for DeviceManager {
fn to_aml_bytes(&self) -> Vec<u8> {
@ -1636,11 +1678,13 @@ impl Aml for DeviceManager {
let pci_device = PciDevSlot { device_id };
pci_devices.push(pci_device);
}
for pci_device in pci_devices.iter() {
pci_dsdt_inner_data.push(pci_device);
}
let pci_device_methods = PciDevSlotMethods {};
pci_dsdt_inner_data.push(&pci_device_methods);
let pci_dsdt_data =
aml::Device::new("_SB_.PCI0".into(), pci_dsdt_inner_data).to_aml_bytes();