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SecurityPkg: Tcg2Smm: Enhance TIS interface detection 

TCG PC Client PTP spec defines that if InterfaceType is defined as TIS1.3. All the other fields of the FIFO Interface Identifier Register are skipped.
http://www.trustedcomputinggroup.org/pc-client-specific-platform-tpm-profile-for-tpm-2-0-v43-150126/

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chao Zhang <chao.b.zhang@intel.com>
Reviewed-by: Yao Jiewen <jiewen.yao@intel.com>
Reviewed-by: Long Qin <qin.long@intel.com>
This commit is contained in:
Zhang, Chao B 2016-06-12 10:23:16 +08:00
parent 4ac4729eb7
commit 3b5624b014
1 changed files with 11 additions and 1 deletions
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12
SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c
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@ -50,18 +50,27 @@ GetPtpInterface (
InterfaceId.Uint32 = MmioRead32 ((UINTN)&((PTP_CRB_REGISTERS *)Register)->InterfaceId);
InterfaceCapability.Uint32 = MmioRead32 ((UINTN)&((PTP_FIFO_REGISTERS *)Register)->InterfaceCapability);
if (InterfaceId.Bits.InterfaceType == PTP_INTERFACE_IDENTIFIER_INTERFACE_TYPE_TIS) {
return PtpInterfaceTis;
}
if ((InterfaceId.Bits.InterfaceType == PTP_INTERFACE_IDENTIFIER_INTERFACE_TYPE_CRB) &&
(InterfaceId.Bits.InterfaceVersion == PTP_INTERFACE_IDENTIFIER_INTERFACE_VERSION_CRB) &&
(InterfaceId.Bits.CapCRB != 0)) {
return PtpInterfaceCrb;
}
if ((InterfaceId.Bits.InterfaceType == PTP_INTERFACE_IDENTIFIER_INTERFACE_TYPE_FIFO) &&
(InterfaceId.Bits.InterfaceVersion == PTP_INTERFACE_IDENTIFIER_INTERFACE_VERSION_FIFO) &&
(InterfaceId.Bits.CapFIFO != 0) &&
(InterfaceCapability.Bits.InterfaceVersion == INTERFACE_CAPABILITY_INTERFACE_VERSION_PTP)) {
return PtpInterfaceFifo;
}
return PtpInterfaceTis;
//
// No Ptp interface available
//
return PtpInterfaceMax;
}
EFI_TPM2_ACPI_TABLE mTpm2AcpiTemplate = {
@ -400,6 +409,7 @@ PublishTpm2 (
case PtpInterfaceTis:
break;
default:
DEBUG((EFI_D_ERROR, "TPM2 InterfaceType get error! %d\n", InterfaceType));
break;
}