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https://github.com/cloud-hypervisor/cloud-hypervisor.git
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88a9f79944
Historically the Cloud Hypervisor coding style has been to ensure that all imports are ordered and placed in a single group. Unfortunately cargo fmt has no support for ensuring that all imports are in a single group so if whitespace lines were added as part of the import statements then they would only be odered correctly in the group. By adopting "group_imports="StdExternalCrate" we can enforce a style where imports are placed in at most three groups for std, external crates and the crate itself. Choosing a style enforceable by the tooling reduces the reviewer burden. Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
51 lines
1.4 KiB
Rust
51 lines
1.4 KiB
Rust
// Copyright 2020 Arm Limited (or its affiliates). All rights reserved.
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//
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// SPDX-License-Identifier: Apache-2.0
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use std::io::{Read, Seek, SeekFrom};
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use std::os::fd::AsFd;
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use std::result;
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use thiserror::Error;
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use vm_memory::{GuestAddress, GuestMemory};
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/// Errors thrown while loading UEFI binary
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#[derive(Debug, Error)]
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pub enum Error {
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/// Unable to seek to UEFI image start.
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#[error("Unable to seek to UEFI image start")]
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SeekUefiStart,
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/// Unable to seek to UEFI image end.
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#[error("Unable to seek to UEFI image end")]
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SeekUefiEnd,
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/// UEFI image too big.
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#[error("UEFI image too big")]
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UefiTooBig,
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/// Unable to read UEFI image
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#[error("Unable to read UEFI image")]
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ReadUefiImage,
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}
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type Result<T> = result::Result<T, Error>;
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pub fn load_uefi<F, M: GuestMemory>(
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guest_mem: &M,
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guest_addr: GuestAddress,
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uefi_image: &mut F,
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) -> Result<()>
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where
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F: Read + Seek + AsFd,
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{
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let uefi_size = uefi_image
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.seek(SeekFrom::End(0))
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.map_err(|_| Error::SeekUefiEnd)? as usize;
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// edk2 image on virtual platform is smaller than 3M
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if uefi_size > 0x300000 {
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return Err(Error::UefiTooBig);
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}
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uefi_image.rewind().map_err(|_| Error::SeekUefiStart)?;
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guest_mem
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.read_exact_volatile_from(guest_addr, &mut uefi_image.as_fd(), uefi_size)
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.map_err(|_| Error::ReadUefiImage)
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}
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