REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2793
In current implementation TPM2_ChangeEPS command is always available
in the TPM2 operation pull down list in TCG2 Configuration, which
is confusing when the command is not supported by specific TPM chip.
As a user experience improvement, TPM2_ChangeEPS command should be
removed from the list when it is not supported.
Add a new function Tpm2GetCapabilityIsCmdImpl() to query if the command
is supported.
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Jian J Wang <jian.j.w...@intel.com>
Cc: Chao Zhang <chao.b.zh...@intel.com>
Cc: Rahul Kumar <rahul1.ku...@intel.com>
Signed-off-by: Zhang, Qi <qi1.zh...@intel.com>
---
SecurityPkg/Include/Library/Tpm2CommandLib.h | 16 ++++++++++++++++
SecurityPkg/Library/Tpm2CommandLib/Tpm2Capability.c | 40
++++++++++++++++++++++++++++++++++++++++
SecurityPkg/Tcg/Tcg2Config/Tcg2Config.vfr | 2 ++
SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigImpl.c | 7 +++++++
SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigNvData.h | 1 +
5 files changed, 66 insertions(+)
diff --git a/SecurityPkg/Include/Library/Tpm2CommandLib.h
b/SecurityPkg/Include/Library/Tpm2CommandLib.h
index ce381e786b..ce7290c0f5 100644
--- a/SecurityPkg/Include/Library/Tpm2CommandLib.h
+++ b/SecurityPkg/Include/Library/Tpm2CommandLib.h
@@ -790,6 +790,22 @@ Tpm2GetCapabilityAlgorithmSet (
OUT UINT32 *AlgorithmSet
);
+/**
+ This function will query if the command is supported.
+
+ @param[In] Command TPM_CC command starts from TPM_CC_FIRST.
+ @param[out] IsCmdImpl The command is supported or not.
+
+ @retval EFI_SUCCESS Operation completed successfully.
+ @retval EFI_DEVICE_ERROR The command was unsuccessful.
+**/
+EFI_STATUS
+EFIAPI
+Tpm2GetCapabilityIsCmdImpl (
+ IN TPM_CC Command,
+ OUT BOOLEAN *IsCmdImpl
+ );
+
/**
This command is used to check to see if specific combinations of algorithm
parameters are supported.
diff --git a/SecurityPkg/Library/Tpm2CommandLib/Tpm2Capability.c
b/SecurityPkg/Library/Tpm2CommandLib/Tpm2Capability.c
index 85b11c7715..0c8f980e69 100644
--- a/SecurityPkg/Library/Tpm2CommandLib/Tpm2Capability.c
+++ b/SecurityPkg/Library/Tpm2CommandLib/Tpm2Capability.c
@@ -39,6 +39,8 @@ typedef struct {
#pragma pack()
+#define TPMA_CC_COMMANDINDEX_MASK 0x2000FFFF
+
/**
This command returns various information regarding the TPM and its current
state.
@@ -628,6 +630,44 @@ Tpm2GetCapabilityAlgorithmSet (
return EFI_SUCCESS;
}
+/**
+ This function will query if the command is supported.
+
+ @param[In] Command TPM_CC command starts from TPM_CC_FIRST.
+ @param[out] IsCmdImpl The command is supported or not.
+
+ @retval EFI_SUCCESS Operation completed successfully.
+ @retval EFI_DEVICE_ERROR The command was unsuccessful.
+**/
+EFI_STATUS
+EFIAPI
+Tpm2GetCapabilityIsCmdImpl (
+ IN TPM_CC Command,
+ OUT BOOLEAN *IsCmdImpl
+ )
+{
+ TPMS_CAPABILITY_DATA TpmCap;
+ TPMI_YES_NO MoreData;
+ EFI_STATUS Status;
+ UINT32 Attribute;
+
+ Status = Tpm2GetCapability (
+ TPM_CAP_COMMANDS,
+ Command,
+ 1,
+ &MoreData,
+ &TpmCap
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ CopyMem (&Attribute, &TpmCap.data.command.commandAttributes[0], sizeof
(UINT32));
+ *IsCmdImpl = (Command == (SwapBytes32(Attribute) &
TPMA_CC_COMMANDINDEX_MASK));
+
+ return EFI_SUCCESS;
+}
+
/**
This command is used to check to see if specific combinations of algorithm
parameters are supported.
diff --git a/SecurityPkg/Tcg/Tcg2Config/Tcg2Config.vfr
b/SecurityPkg/Tcg/Tcg2Config/Tcg2Config.vfr
index 91a463997c..47d63b009d 100644
--- a/SecurityPkg/Tcg/Tcg2Config/Tcg2Config.vfr
+++ b/SecurityPkg/Tcg/Tcg2Config/Tcg2Config.vfr
@@ -144,7 +144,9 @@ formset
option text = STRING_TOKEN(STR_TCG2_DISABLE), value =
TCG2_PHYSICAL_PRESENCE_DISABLE, flags = RESET_REQUIRED;
option text = STRING_TOKEN(STR_TCG2_CLEAR), value =
TCG2_PHYSICAL_PRESENCE_CLEAR, flags = RESET_REQUIRED;
option text = STRING_TOKEN(STR_TCG2_SET_PCD_BANKS), value =
TCG2_PHYSICAL_PRESENCE_SET_PCR_BANKS, flags = RESET_REQUIRED;
+ suppressif ideqval TCG2_CONFIGURATION_INFO.ChangeEPSSupported == 0;
option text = STRING_TOKEN(STR_TCG2_CHANGE_EPS), value =
TCG2_PHYSICAL_PRESENCE_CHANGE_EPS, flags = RESET_REQUIRED;
+ endif
option text = STRING_TOKEN(STR_TCG2_LOG_ALL_DIGESTS), value =
TCG2_PHYSICAL_PRESENCE_LOG_ALL_DIGESTS, flags = RESET_REQUIRED;
option text =
STRING_TOKEN(STR_TCG2_DISABLE_ENDORSEMENT_ENABLE_STORAGE_HIERARCHY), value =
TCG2_PHYSICAL_PRESENCE_DISABLE_ENDORSEMENT_ENABLE_STORAGE_HIERARCHY, flags =
RESET_REQUIRED;
endoneof;
diff --git a/SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigImpl.c
b/SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigImpl.c
index baa8fcd08d..464cacc207 100644
--- a/SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigImpl.c
+++ b/SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigImpl.c
@@ -788,6 +788,7 @@ InstallTcg2ConfigForm (
CHAR16 TempBuffer[1024];
TCG2_CONFIGURATION_INFO Tcg2ConfigInfo;
TPM2_PTP_INTERFACE_TYPE TpmDeviceInterfaceDetected;
+ BOOLEAN IsCmdImp = FALSE;
DriverHandle = NULL;
ConfigAccess = &PrivateData->ConfigAccess;
@@ -870,6 +871,12 @@ InstallTcg2ConfigForm (
HiiSetString (PrivateData->HiiHandle, STRING_TOKEN
(STR_TPM2_SUPPORTED_HASH_ALGO_CONTENT), TempBuffer, NULL);
}
+ Status = Tpm2GetCapabilityIsCmdImpl(TPM_CC_ChangeEPS, &IsCmdImp);
+ if (EFI_ERROR (Status)) {
+ DEBUG ((EFI_D_ERROR, "Tpm2GetCapabilityIsCmdImpl fails %r\n", Status));
+ }
+ Tcg2ConfigInfo.ChangeEPSSupported = IsCmdImp;
+
FillBufferWithBootHashAlg (TempBuffer, sizeof(TempBuffer), PcdGet32
(PcdTcg2HashAlgorithmBitmap));
HiiSetString (PrivateData->HiiHandle, STRING_TOKEN
(STR_BIOS_HASH_ALGO_CONTENT), TempBuffer, NULL);
diff --git a/SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigNvData.h
b/SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigNvData.h
index a91c052850..b84af40a04 100644
--- a/SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigNvData.h
+++ b/SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigNvData.h
@@ -70,6 +70,7 @@ typedef struct {
UINT8 TpmDeviceInterfaceAttempt;
BOOLEAN TpmDeviceInterfacePtpFifoSupported;
BOOLEAN TpmDeviceInterfacePtpCrbSupported;
+ BOOLEAN ChangeEPSSupported;
} TCG2_CONFIGURATION_INFO;
//
--
2.26.2.windows.1
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