Method allocate_bars

devices/src/pvpanic.rs:175–209

(
        &mut self,
        _allocator: &mut SystemAllocator,
        mmio32_allocator: &mut AddressAllocator,
        _mmio64_allocator: &mut AddressAllocator,
        resources: Option<Vec<Resource

    }

    fn allocate_bars(
        &mut self,
        _allocator: &mut SystemAllocator,
        mmio32_allocator: &mut AddressAllocator,
        _mmio64_allocator: &mut AddressAllocator,
        resources: Option<Vec<Resource>>,
    ) -> std::result::Result<Vec<PciBarConfiguration>, PciDeviceError> {
        let mut bars = Vec::new();
        let region_type = PciBarRegionType::Memory32BitRegion;
        let bar_id = 0;
        let region_size = PVPANIC_DEVICE_MMIO_SIZE;
        let restoring = resources.is_some();
        let bar_addr = mmio32_allocator
            .allocate(None, region_size, Some(PVPANIC_DEVICE_MMIO_ALIGNMENT))
            .ok_or(PciDeviceError::IoAllocationFailed(region_size))?;

        let bar = PciBarConfiguration::default()
            .set_index(bar_id as usize)
            .set_address(bar_addr.raw_value())
            .set_size(region_size)
            .set_region_type(region_type)
            .set_prefetchable(PciBarPrefetchable::NotPrefetchable);

        debug!("pvpanic bar address 0x{:x}", bar_addr.0);
        if !restoring {
            self.configuration
                .add_pci_bar(&bar)
                .map_err(|e| PciDeviceError::IoRegistrationFailed(bar_addr.raw_value(), e))?;
        }

        bars.push(bar);
        self.bar_regions.clone_from(&bars);

        Ok(bars)
    }

    fn free_bars(
        &mut self,