QemuBootOrderLib.h File Reference

Functions
RETURN_STATUS EFIAPI	ConnectDevicesFromQemu (VOID)
RETURN_STATUS EFIAPI	SetBootOrderFromQemu (VOID)
UINT16 EFIAPI	GetFrontPageTimeoutFromQemu (VOID)

Detailed Description

Rewrite the BootOrder NvVar based on QEMU's "bootorder" fw_cfg file – include file.

Copyright (C) 2012-2014, Red Hat, Inc.

SPDX-License-Identifier: BSD-2-Clause-Patent

Function Documentation

RETURN_STATUS EFIAPI ConnectDevicesFromQemu

(

VOID

)

Connect devices based on the boot order retrieved from QEMU.

Attempt to retrieve the "bootorder" fw_cfg file from QEMU. Translate the OpenFirmware device paths therein to UEFI device path fragments. Connect the devices identified by the UEFI devpath prefixes as narrowly as possible, then connect all their child devices, recursively.

If this function fails, then platform BDS should fall back to EfiBootManagerConnectAll(), or some other method for connecting any expected boot devices.

Return values

RETURN_SUCCESS	The "bootorder" fw_cfg file has been parsed, and the referenced device-subtrees have been connected.
RETURN_UNSUPPORTED	QEMU's fw_cfg is not supported.
RETURN_NOT_FOUND	Empty or nonexistent "bootorder" fw_cfg file.
RETURN_INVALID_PARAMETER	Parse error in the "bootorder" fw_cfg file.
RETURN_OUT_OF_RESOURCES	Memory allocation failed.

Returns

Error statuses propagated from underlying functions.

UINT16 EFIAPI GetFrontPageTimeoutFromQemu

(

VOID

)

Calculate the number of seconds we should be showing the FrontPage progress bar for.

Returns

The TimeoutDefault argument for PlatformBdsEnterFrontPage().

RETURN_STATUS EFIAPI SetBootOrderFromQemu

(

VOID

)

Set the boot order based on configuration retrieved from QEMU.

Attempt to retrieve the "bootorder" fw_cfg file from QEMU. Translate the OpenFirmware device paths therein to UEFI device path fragments. Match the translated fragments against the current list of boot options, and rewrite the BootOrder NvVar so that it corresponds to the order described in fw_cfg.

Platform BDS should call this function after connecting any expected boot devices and calling EfiBootManagerRefreshAllBootOption ().

Return values

RETURN_SUCCESS	BootOrder NvVar rewritten.
RETURN_UNSUPPORTED	QEMU's fw_cfg is not supported.
RETURN_NOT_FOUND	Empty or nonexistent "bootorder" fw_cfg file, or no match found between the "bootorder" fw_cfg file and BootOptionList.
RETURN_INVALID_PARAMETER	Parse error in the "bootorder" fw_cfg file.
RETURN_OUT_OF_RESOURCES	Memory allocation failed.

Returns

Values returned by gBS->LocateProtocol () or gRT->SetVariable ().