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2bbda9de78
If set by bootloader chained from shim before further image is loaded, instructs shim to keep its protocol and its security overrides (if enabled) present for all image loads, not just the first.
33 lines
658 B
C
33 lines
658 B
C
/** @file
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Manage variables for GRUB2 shim.
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Copyright (C) 2023, Mike Beaton. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-3-Clause
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**/
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#include <Uefi.h>
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#include <ShimVars.h>
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#include <Library/UefiRuntimeServicesTableLib.h>
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EFI_STATUS
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OcShimRetainProtocol (
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IN BOOLEAN Required
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)
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{
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UINT8 ShimRetainProtocol;
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if (!Required) {
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return EFI_SUCCESS;
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}
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ShimRetainProtocol = 1;
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return gRT->SetVariable (
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SHIM_RETAIN_PROTOCOL,
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&gShimLockGuid,
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EFI_VARIABLE_BOOTSERVICE_ACCESS,
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sizeof (ShimRetainProtocol),
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&ShimRetainProtocol
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);
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}
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