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| author | Ruiyu Ni <ruiyu.ni@intel.com> | 2017-08-24 14:51:58 +0800 |
|---|---|---|
| committer | Ruiyu Ni <ruiyu.ni@intel.com> | 2017-08-25 16:59:08 +0800 |
| commit | 9d5dfe9d74fba521011236fb4b0c8c8547e03dda (patch) | |
| tree | d31e1d7cd232f8e1cce3f07105d7fb0e38cae81f /SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c | |
| parent | 0a568ccbcbd13751b92438c000df79c0d6c2d8f9 (diff) | |
| download | edk2-9d5dfe9d74fba521011236fb4b0c8c8547e03dda.zip edk2-9d5dfe9d74fba521011236fb4b0c8c8547e03dda.tar.gz edk2-9d5dfe9d74fba521011236fb4b0c8c8547e03dda.tar.bz2 | |
SecurityPkg/Tcg2Dxe: Properly shutdown TPM before reset
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <ruiyu.ni@intel.com>
Reviewed-by: Chao B Zhang <chao.b.zhang@intel.com>
Diffstat (limited to 'SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c')
| -rw-r--r-- | SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c b/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c index c2c52e3..e2f3462 100644 --- a/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c +++ b/SecurityPkg/Tcg/Tcg2Dxe/Tcg2Dxe.c @@ -31,6 +31,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #include <Protocol/VariableWrite.h>
#include <Protocol/Tcg2Protocol.h>
#include <Protocol/TrEEProtocol.h>
+#include <Protocol/ResetNotification.h>
#include <Library/DebugLib.h>
#include <Library/BaseMemoryLib.h>
@@ -2413,6 +2414,68 @@ OnExitBootServicesFailed ( }
/**
+ This routine is called to properly shutdown the TPM before system reset.
+ It follow chapter "12.2.3 Startup State" in Trusted Platform Module Library
+ Part 1: Architecture, Revision 01.16.
+
+ @param[in] ResetType The type of reset to perform.
+ @param[in] ResetStatus The status code for the reset.
+ @param[in] DataSize The size, in bytes, of ResetData.
+ @param[in] ResetData For a ResetType of EfiResetCold, EfiResetWarm, or
+ EfiResetShutdown the data buffer starts with a Null-terminated
+ string, optionally followed by additional binary data.
+ The string is a description that the caller may use to further
+ indicate the reason for the system reset. ResetData is only
+ valid if ResetStatus is something other than EFI_SUCCESS
+ unless the ResetType is EfiResetPlatformSpecific
+ where a minimum amount of ResetData is always required.
+ For a ResetType of EfiResetPlatformSpecific the data buffer
+ also starts with a Null-terminated string that is followed
+ by an EFI_GUID that describes the specific type of reset to perform.
+**/
+VOID
+EFIAPI
+ShutdownTpmOnReset (
+ IN EFI_RESET_TYPE ResetType,
+ IN EFI_STATUS ResetStatus,
+ IN UINTN DataSize,
+ IN VOID *ResetData OPTIONAL
+ )
+{
+ EFI_STATUS Status;
+ Status = Tpm2Shutdown (TPM_SU_CLEAR);
+ DEBUG ((DEBUG_VERBOSE, "Tpm2Shutdown (SU_CLEAR) - %r\n", Status));
+}
+
+/**
+ Hook the system reset to properly shutdown TPM.
+ It follow chapter "12.2.3 Startup State" in Trusted Platform Module Library
+ Part 1: Architecture, Revision 01.16.
+
+ @param[in] Event Event whose notification function is being invoked
+ @param[in] Context Pointer to the notification function's context
+**/
+VOID
+EFIAPI
+OnResetNotificationInstall (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ EFI_STATUS Status;
+ EFI_RESET_NOTIFICATION_PROTOCOL *ResetNotify;
+
+ Status = gBS->LocateProtocol (&gEfiResetNotificationProtocolGuid, NULL, (VOID **) &ResetNotify);
+ if (!EFI_ERROR (Status)) {
+ Status = ResetNotify->RegisterResetNotify (ResetNotify, ShutdownTpmOnReset);
+ ASSERT_EFI_ERROR (Status);
+ DEBUG ((DEBUG_VERBOSE, "TCG2: Hook system reset to properly shutdown TPM.\n"));
+
+ gBS->CloseEvent (Event);
+ }
+}
+
+/**
The function install Tcg2 protocol.
@retval EFI_SUCCESS Tcg2 protocol is installed.
@@ -2609,6 +2672,11 @@ DriverEntry ( // may update SecureBoot value based on last setting.
//
EfiCreateProtocolNotifyEvent (&gEfiVariableWriteArchProtocolGuid, TPL_CALLBACK, MeasureSecureBootPolicy, NULL, &Registration);
+
+ //
+ // Hook the system reset to properly shutdown TPM.
+ //
+ EfiCreateProtocolNotifyEvent (&gEfiResetNotificationProtocolGuid, TPL_CALLBACK, OnResetNotificationInstall, NULL, &Registration);
}
//
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