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vm-virtio: pci: Update the BARs used by the VirtioPciDevice

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In order to support freeing the memory that is allocated we need to make
sure that we update the internal representation so that free_bars() can
correctly free the memory if the device has its BARs moved.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2020-04-09 13:15:18 +01:00 committed by Sebastien Boeuf
parent 56207a0328
commit 8ff3633782
1 changed files with 12 additions and 0 deletions
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12
vm-virtio/src/transport/pci_device.rs
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@ -787,6 +787,18 @@ impl PciDevice for VirtioPciDevice {
Ok(()) Ok(())
} }
fn move_bar(&mut self, old_base: u64, new_base: u64) -> result::Result<(), std::io::Error> {
// We only update our idea of the bar in order to support free_bars() above.
// The majority of the reallocation is done inside DeviceManager.
for (addr, _, _) in self.bar_regions.iter_mut() {
if (*addr).0 == old_base {
*addr = GuestAddress(new_base);
}
}
Ok(())
}
fn read_bar(&mut self, _base: u64, offset: u64, data: &mut [u8]) { fn read_bar(&mut self, _base: u64, offset: u64, data: &mut [u8]) {
match offset { match offset {
o if o < COMMON_CONFIG_BAR_OFFSET + COMMON_CONFIG_SIZE => self.common_config.read( o if o < COMMON_CONFIG_BAR_OFFSET + COMMON_CONFIG_SIZE => self.common_config.read(