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SecurityPkg/SmmTcg2PhysicalPresenceLib: Add Tcg2PhysicalPresenceLibGetManagementFlags support.

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OpalPasswordSmm driver need to use this API from this library, so enable this API.

Signed-off-by: Eric Dong <eric.dong@intel.com>
This commit is contained in:
Eric Dong
2017-12-06 14:35:02 +08:00
parent 9ae0b48624
commit 833f9f2696
1 changed files with 32 additions and 0 deletions
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32
SecurityPkg/Library/SmmTcg2PhysicalPresenceLib/SmmTcg2PhysicalPresenceLib.c
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@@ -34,6 +34,38 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
EFI_SMM_VARIABLE_PROTOCOL *mTcg2PpSmmVariable;
/**
Return TPM2 ManagementFlags set by PP interface.
@retval ManagementFlags TPM2 Management Flags.
**/
UINT32
EFIAPI
Tcg2PhysicalPresenceLibGetManagementFlags (
VOID
)
{
EFI_STATUS Status;
EFI_TCG2_PHYSICAL_PRESENCE_FLAGS PpiFlags;
UINTN DataSize;
DEBUG ((EFI_D_INFO, "[TPM2] GetManagementFlags\n"));
DataSize = sizeof (EFI_TCG2_PHYSICAL_PRESENCE_FLAGS);
Status = mTcg2PpSmmVariable->SmmGetVariable (
TCG2_PHYSICAL_PRESENCE_FLAGS_VARIABLE,
&gEfiTcg2PhysicalPresenceGuid,
NULL,
&DataSize,
&PpiFlags
);
if (EFI_ERROR (Status)) {
DEBUG ((EFI_D_ERROR, "[TPM2] Get PP flags variable failure! Status = %r\n", Status));
PpiFlags.PPFlags = TCG2_BIOS_TPM_MANAGEMENT_FLAG_DEFAULT | TCG2_BIOS_STORAGE_MANAGEMENT_FLAG_DEFAULT;
}
return PpiFlags.PPFlags;
}
/**
The handler for TPM physical presence function:
Return TPM Operation Response to OS Environment.