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vmm: x86_64: Add support for firmware loading

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Since our firmware files are still designed to be used via PVH use the
load_kernel() function to load the firmware falling back to legacy
firmware loading if necessary.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2022-08-16 12:41:44 +01:00
parent 8ec5a248cd
commit 0d682e185f
1 changed files with 21 additions and 15 deletions
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36
vmm/src/vm.rs
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@ -1037,7 +1037,7 @@ impl Vm {
#[cfg(target_arch = "x86_64")]
fn load_kernel(
mut kernel: File,
cmdline: Cmdline,
cmdline: Option<Cmdline>,
memory_manager: Arc<Mutex<MemoryManager>>,
) -> Result<EntryPoint> {
use linux_loader::loader::{elf::Error::InvalidElfMagicNumber, Error::Elf};
@ -1062,8 +1062,10 @@ impl Vm {
},
};
linux_loader::loader::load_cmdline(mem.deref(), arch::layout::CMDLINE_START, &cmdline)
.map_err(Error::LoadCmdLine)?;
if let Some(cmdline) = cmdline {
linux_loader::loader::load_cmdline(mem.deref(), arch::layout::CMDLINE_START, &cmdline)
.map_err(Error::LoadCmdLine)?;
}
if let PvhEntryPresent(entry_addr) = entry_addr.pvh_boot_cap {
// Use the PVH kernel entry point to boot the guest
@ -1081,18 +1083,22 @@ impl Vm {
payload: &PayloadConfig,
memory_manager: Arc<Mutex<MemoryManager>>,
) -> Result<EntryPoint> {
let kernel = payload
.kernel
.as_ref()
.map(File::open)
.transpose()
.map_err(Error::KernelFile)?;
if let Some(kernel) = kernel {
let cmdline = Self::generate_cmdline(payload)?;
Self::load_kernel(kernel, cmdline, memory_manager)
} else {
Err(Error::InvalidPayload)
match (
&payload.firmware,
&payload.kernel,
&payload.initramfs,
&payload.cmdline,
) {
(Some(firmware), None, None, None) => {
let firmware = File::open(firmware).map_err(Error::FirmwareFile)?;
Self::load_kernel(firmware, None, memory_manager)
}
(None, Some(kernel), _, _) => {
let kernel = File::open(kernel).map_err(Error::KernelFile)?;
let cmdline = Self::generate_cmdline(payload)?;
Self::load_kernel(kernel, Some(cmdline), memory_manager)
}
_ => Err(Error::InvalidPayload),
}
}