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pci: vfio_user: Implement PciDevice::move_bar()

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When the BAR is moved location then update the BAR address and the guest
mapping.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2021-08-11 22:51:28 +00:00
parent 6f436f02dc
commit 0b5c680d15
1 changed files with 43 additions and 0 deletions
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43
pci/src/vfio_user.rs
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@ -271,6 +271,49 @@ impl PciDevice for VfioUserPciDevice {
self.common
.write_bar(base, offset, data, &self.vfio_wrapper)
}
fn move_bar(&mut self, old_base: u64, new_base: u64) -> Result<(), std::io::Error> {
info!("Moving BAR 0x{:x} -> 0x{:x}", old_base, new_base);
for mmio_region in self.common.mmio_regions.iter_mut() {
if mmio_region.start.raw_value() == old_base {
mmio_region.start = GuestAddress(new_base);
if let Some(mem_slot) = mmio_region.mem_slot {
if let Some(host_addr) = mmio_region.host_addr {
// Remove original region
let old_region = self.vm.make_user_memory_region(
mem_slot,
old_base,
mmio_region.length as u64,
host_addr as u64,
false,
false,
);
self.vm
.remove_user_memory_region(old_region)
.map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e))?;
let new_region = self.vm.make_user_memory_region(
mem_slot,
new_base,
mmio_region.length as u64,
host_addr as u64,
false,
false,
);
self.vm
.create_user_memory_region(new_region)
.map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e))?;
}
}
info!("Moved bar 0x{:x} -> 0x{:x}", old_base, new_base);
}
}
Ok(())
}
}
impl VfioUserPciDevice {