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virtio-devices: modify or provide safety comments

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Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit is contained in:
Wei Liu
2022-11-16 22:42:25 +00:00
committed by Liu Wei
parent f110029acf
commit c45d24df16
12 changed files with 41 additions and 9 deletions
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virtio-devices/src/transport/pci_device.rs
+2 -2
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@@ -666,8 +666,8 @@ impl VirtioPciDevice {
.unwrap();
}
} else {
// Safe since we know self.cap_pci_cfg_info.cap.cap.offset is 32bits long.
let bar_offset: u32 =
// SAFETY: we know self.cap_pci_cfg_info.cap.cap.offset is 32bits long.
unsafe { std::mem::transmute(self.cap_pci_cfg_info.cap.cap.offset) };
self.read_bar(0, bar_offset as u64, data)
}
@@ -687,8 +687,8 @@ impl VirtioPciDevice {
right[..data_len].copy_from_slice(data);
None
} else {
// Safe since we know self.cap_pci_cfg_info.cap.cap.offset is 32bits long.
let bar_offset: u32 =
// SAFETY: we know self.cap_pci_cfg_info.cap.cap.offset is 32bits long.
unsafe { std::mem::transmute(self.cap_pci_cfg_info.cap.cap.offset) };
self.write_bar(0, bar_offset as u64, data)
}