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vmm: Simplify slot eject code in PCI ACPI device code

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Use a simpler method for extracting the affected slot on the eject
command. Also update the terminology to reflect that this a slot rather
than a bdf (which is what device id refers to elsewhere.)

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2021-09-27 14:52:10 +01:00 committed by Sebastien Boeuf
parent 08d859a7dd
commit b50519651c
1 changed files with 7 additions and 8 deletions
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15
vmm/src/device_manager.rs
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@ -4439,7 +4439,7 @@ impl BusDevice for DeviceManager {
assert!(data.len() == B0EJ_FIELD_SIZE);
// Always return an empty bitmap since the eject is always
// taken care of right away during a write access.
data.copy_from_slice(&[0, 0, 0, 0]);
data.fill(0);
}
_ => error!(
"Accessing unknown location at base 0x{:x}, offset 0x{:x}",
@ -4459,15 +4459,14 @@ impl BusDevice for DeviceManager {
assert!(data.len() == B0EJ_FIELD_SIZE);
let mut data_array: [u8; 4] = [0, 0, 0, 0];
data_array.copy_from_slice(data);
let device_bitmap = u32::from_le_bytes(data_array);
let mut slot_bitmap = u32::from_le_bytes(data_array);
for device_id in 0..32 {
let mask = 1u32 << device_id;
if (device_bitmap & mask) == mask {
if let Err(e) = self.eject_device(device_id as u8) {
error!("Failed ejecting device {}: {:?}", device_id, e);
}
while slot_bitmap > 0 {
let slot_id = slot_bitmap.trailing_zeros();
if let Err(e) = self.eject_device(slot_id as u8) {
error!("Failed ejecting device {}: {:?}", slot_id, e);
}
slot_bitmap &= !(1 << slot_id);
}
}
_ => error!(