c4bc1a9498
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3974 SecPeiCcProbeLib is designed to probe the Confidential Computing guest type in SEC/PEI phase. The CC guest type was set by each CC guest at the beginning of boot up and saved in PcdOvmfWorkArea. Cc: Erdem Aktas <erdemaktas@google.com> Cc: James Bottomley <jejb@linux.ibm.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Min Xu <min.m.xu@intel.com> Acked-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
32 lines
657 B
C
32 lines
657 B
C
/** @file
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CcProbeLib is used to probe the Confidential computing guest type.
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Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Library/CcProbeLib.h>
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#include <WorkArea.h>
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/**
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Probe the ConfidentialComputing Guest type. See defition of
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CC_GUEST_TYPE in <ConfidentialComputingGuestAttr.h>.
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@return The guest type
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**/
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UINT8
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EFIAPI
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CcProbe (
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VOID
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)
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{
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OVMF_WORK_AREA *WorkArea;
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WorkArea = (OVMF_WORK_AREA *)FixedPcdGet32 (PcdOvmfWorkAreaBase);
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return WorkArea != NULL ? WorkArea->Header.GuestType : CcGuestTypeNonEncrypted;
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}
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