mirror of
https://github.com/Dasharo/edk2.git
synced 2026-03-06 14:47:27 -08:00
96a094d553
HAP-disabled ME doesn't do anything, including writing to system flash, which is what we need for a firmware update that relies on a warm reset. coreboot assumes that HECI/soft-disabled state of ME isn't as good as HMRFPO and switches to HMRFPO doing a global reset which loses in-RAM capsules. Checking variable's value should be enough, if somebody manually set it to an invalid value, the update there will be a reboot without a capsule update. A more reliable solution would be to pass this information from coreboot. Signed-off-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com>
80 lines
1.6 KiB
C
80 lines
1.6 KiB
C
/** @file
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A library for providing services related to Dasharo-specific EFI variables.
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Copyright (c) 2024, 3mdeb Sp. z o.o. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#ifndef _DASHARO_VARIABLES_LIB_H_
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#define _DASHARO_VARIABLES_LIB_H_
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#include <Base.h>
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#include <DasharoOptions.h>
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/**
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Query a default value for a specified variable.
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@param VarName Name of the variable.
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@retval Default value which is all zeroes for an unknown variable name.
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**/
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DASHARO_VAR_DATA
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EFIAPI
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DasharoGetVariableDefault (
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CHAR16 *VarName
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);
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/**
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Query attributes of a specified variable.
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@param VarName Name of the variable.
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@retval EFI variable attributes (the value is sensible for unknown ones).
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**/
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UINT32
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EFIAPI
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DasharoGetVariableAttributes (
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CHAR16 *VarName
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);
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/**
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Measure EFI variables specific to Dasharo.
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This function should be called before booting into an OS or a UEFI
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application.
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@retval RETURN_SUCCESS Successfully measured all variables.
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**/
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EFI_STATUS
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EFIAPI
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DasharoMeasureVariables (
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VOID
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);
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/**
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Enable firmware update mode (FUM) for the duration of the next boot.
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@retval RETURN_SUCCESS FUM was successfully enabled.
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**/
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EFI_STATUS
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EFIAPI
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DasharoEnableFUM (
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VOID
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);
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/**
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Check whether capsule updates which survive a warm system reset are permitted
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by current configuration.
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@retval TRUE Persistent capsules can be accepted by UpdateCapsule().
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@retval FALSE UpdateCapsule() must fail with an error for such a capsule.
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**/
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BOOLEAN
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EFIAPI
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DasharoCapsulesCanPersistAcrossReset (
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VOID
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);
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#endif
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