diff options
Diffstat (limited to 'SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigDriver.c')
| -rw-r--r-- | SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigDriver.c | 152 |
1 files changed, 151 insertions, 1 deletions
diff --git a/SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigDriver.c b/SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigDriver.c index 968670f04d..ad7cd54e6c 100644 --- a/SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigDriver.c +++ b/SecurityPkg/Tcg/Tcg2Config/Tcg2ConfigDriver.c @@ -1,7 +1,7 @@ /** @file
The module entry point for Tcg2 configuration module.
-Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
@@ -61,6 +61,154 @@ UpdateDefaultPCRBanks ( }
/**
+ Initialize TCG2 version information.
+
+ This function will initialize efi varstore configuration data for
+ TCG2_VERSION_NAME variable, check the value of related PCD with
+ the variable value and set string for the version state content
+ according to the PCD value.
+
+ @param[in] PrivateData Points to TCG2 configuration private data.
+
+**/
+VOID
+InitializeTcg2VersionInfo (
+ IN TCG2_CONFIG_PRIVATE_DATA *PrivateData
+ )
+{
+ EFI_STATUS Status;
+ EFI_STRING ConfigRequestHdr;
+ BOOLEAN ActionFlag;
+ TCG2_VERSION Tcg2Version;
+ UINTN DataSize;
+ UINT64 PcdTcg2PpiVersion;
+
+ //
+ // Get the PCD value before initializing efi varstore configuration data.
+ //
+ PcdTcg2PpiVersion = 0;
+ CopyMem (
+ &PcdTcg2PpiVersion,
+ PcdGetPtr (PcdTcgPhysicalPresenceInterfaceVer),
+ AsciiStrSize (PcdGetPtr (PcdTcgPhysicalPresenceInterfaceVer))
+ );
+
+ //
+ // Initialize efi varstore configuration data.
+ //
+ ZeroMem (&Tcg2Version, sizeof (Tcg2Version));
+ ConfigRequestHdr = HiiConstructConfigHdr (
+ &gTcg2ConfigFormSetGuid,
+ TCG2_VERSION_NAME,
+ PrivateData->DriverHandle
+ );
+ ASSERT (ConfigRequestHdr != NULL);
+ DataSize = sizeof (Tcg2Version);
+ Status = gRT->GetVariable (
+ TCG2_VERSION_NAME,
+ &gTcg2ConfigFormSetGuid,
+ NULL,
+ &DataSize,
+ &Tcg2Version
+ );
+ if (!EFI_ERROR (Status)) {
+ //
+ // EFI variable does exist and validate current setting.
+ //
+ ActionFlag = HiiValidateSettings (ConfigRequestHdr);
+ if (!ActionFlag) {
+ //
+ // Current configuration is invalid, reset to defaults.
+ //
+ ActionFlag = HiiSetToDefaults (ConfigRequestHdr, EFI_HII_DEFAULT_CLASS_STANDARD);
+ ASSERT (ActionFlag);
+ //
+ // Get the default values from variable.
+ //
+ DataSize = sizeof (Tcg2Version);
+ Status = gRT->GetVariable (
+ TCG2_VERSION_NAME,
+ &gTcg2ConfigFormSetGuid,
+ NULL,
+ &DataSize,
+ &Tcg2Version
+ );
+ ASSERT_EFI_ERROR (Status);
+ }
+ } else {
+ //
+ // EFI variable doesn't exist.
+ //
+
+ //
+ // Store zero data Buffer Storage to EFI variable.
+ //
+ Status = gRT->SetVariable (
+ TCG2_VERSION_NAME,
+ &gTcg2ConfigFormSetGuid,
+ EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS,
+ sizeof (Tcg2Version),
+ &Tcg2Version
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Tcg2ConfigDriver: Fail to set TCG2_VERSION_NAME\n"));
+ return;
+ } else {
+ //
+ // Build this variable based on default values stored in IFR.
+ //
+ ActionFlag = HiiSetToDefaults (ConfigRequestHdr, EFI_HII_DEFAULT_CLASS_STANDARD);
+ ASSERT (ActionFlag);
+ //
+ // Get the default values from variable.
+ //
+ DataSize = sizeof (Tcg2Version);
+ Status = gRT->GetVariable (
+ TCG2_VERSION_NAME,
+ &gTcg2ConfigFormSetGuid,
+ NULL,
+ &DataSize,
+ &Tcg2Version
+ );
+ ASSERT_EFI_ERROR (Status);
+ if (PcdTcg2PpiVersion != Tcg2Version.PpiVersion) {
+ DEBUG ((DEBUG_WARN, "WARNING: PcdTcgPhysicalPresenceInterfaceVer default value is not same with the default value in VFR\n"));
+ DEBUG ((DEBUG_WARN, "WARNING: The default value in VFR has be chosen\n"));
+ }
+ }
+ }
+ FreePool (ConfigRequestHdr);
+
+ //
+ // Get the PCD value again.
+ // If the PCD value is not equal to the value in variable,
+ // the PCD is not DynamicHii type and maps to the setup option.
+ //
+ PcdTcg2PpiVersion = 0;
+ CopyMem (
+ &PcdTcg2PpiVersion,
+ PcdGetPtr (PcdTcgPhysicalPresenceInterfaceVer),
+ AsciiStrSize (PcdGetPtr (PcdTcgPhysicalPresenceInterfaceVer))
+ );
+ if (PcdTcg2PpiVersion != Tcg2Version.PpiVersion) {
+ DEBUG ((DEBUG_WARN, "WARNING: PcdTcgPhysicalPresenceInterfaceVer is not DynamicHii type and maps to TCG2_VERSION.PpiVersion\n"));
+ DEBUG ((DEBUG_WARN, "WARNING: The TCG2 PPI version configuring from setup page will not work\n"));
+ }
+
+ switch (PcdTcg2PpiVersion) {
+ case TCG2_PPI_VERSION_1_2:
+ HiiSetString (PrivateData->HiiHandle, STRING_TOKEN (STR_TCG2_PPI_VERSION_STATE_CONTENT), L"1.2", NULL);
+ break;
+ case TCG2_PPI_VERSION_1_3:
+ HiiSetString (PrivateData->HiiHandle, STRING_TOKEN (STR_TCG2_PPI_VERSION_STATE_CONTENT), L"1.3", NULL);
+ break;
+ default:
+ ASSERT (FALSE);
+ break;
+ }
+}
+
+/**
The entry point for Tcg2 configuration driver.
@param[in] ImageHandle The image handle of the driver.
@@ -229,6 +377,8 @@ Tcg2ConfigDriverEntryPoint ( goto ErrorExit;
}
+ InitializeTcg2VersionInfo (PrivateData);
+
return EFI_SUCCESS;
ErrorExit:
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