/** @file | |
Try to load an EFI-stubbed ARM Linux kernel from QEMU's fw_cfg. | |
This implementation differs from OvmfPkg/Library/LoadLinuxLib. An EFI | |
stub in the subject kernel is a hard requirement here. | |
Copyright (C) 2014-2016, Red Hat, Inc. | |
SPDX-License-Identifier: BSD-2-Clause-Patent | |
**/ | |
#include <Library/QemuLoadImageLib.h> | |
#include <Library/ReportStatusCodeLib.h> | |
#include "PlatformBm.h" | |
// | |
// The entry point of the feature. | |
// | |
/** | |
Download the kernel, the initial ramdisk, and the kernel command line from | |
QEMU's fw_cfg. Construct a minimal SimpleFileSystem that contains the two | |
image files, and load and start the kernel from it. | |
The kernel will be instructed via its command line to load the initrd from | |
the same Simple FileSystem. | |
@retval EFI_NOT_FOUND Kernel image was not found. | |
@retval EFI_OUT_OF_RESOURCES Memory allocation failed. | |
@retval EFI_PROTOCOL_ERROR Unterminated kernel command line. | |
@return Error codes from any of the underlying | |
functions. On success, the function doesn't | |
return. | |
**/ | |
EFI_STATUS | |
EFIAPI | |
TryRunningQemuKernel ( | |
VOID | |
) | |
{ | |
EFI_STATUS Status; | |
EFI_HANDLE KernelImageHandle; | |
Status = QemuLoadKernelImage (&KernelImageHandle); | |
if (EFI_ERROR (Status)) { | |
return Status; | |
} | |
// | |
// Signal the EFI_EVENT_GROUP_READY_TO_BOOT event. | |
// | |
EfiSignalEventReadyToBoot (); | |
REPORT_STATUS_CODE ( | |
EFI_PROGRESS_CODE, | |
(EFI_SOFTWARE_DXE_BS_DRIVER | EFI_SW_DXE_BS_PC_READY_TO_BOOT_EVENT) | |
); | |
// | |
// Start the image. | |
// | |
Status = QemuStartKernelImage (&KernelImageHandle); | |
if (EFI_ERROR (Status)) { | |
DEBUG (( | |
DEBUG_ERROR, | |
"%a: QemuStartKernelImage(): %r\n", | |
__func__, | |
Status | |
)); | |
} | |
QemuUnloadKernelImage (KernelImageHandle); | |
return Status; | |
} |