SecurityPkg: Tcg2Smm: Update HID patch logic
Update HID patch logic. NOOP in ASL template may cause syntax error when
disassembled and recompiled.
Cc: Long Qin <qin.long@intel.com>
Cc: Yao Jiewen <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Chao Zhang <chao.b.zhang@intel.com>
Reviewed-by: Long Qin <qin.long@intel.com>
Reviewed-by: Yao Jiewen <jiewen.yao@intel.com>
diff --git a/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c b/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c
index 2cedfde..e888058 100644
--- a/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c
+++ b/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.c
@@ -9,7 +9,7 @@
PhysicalPresenceCallback() and MemoryClearCallback() will receive untrusted input and do some check.
-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
@@ -329,7 +329,6 @@
// Initialize HID with Default PNP string
//
ZeroMem(HID, TPM_HID_ACPI_SIZE);
- CopyMem(HID, TPM_HID_TAG, TPM_HID_PNP_SIZE);
//
// Get Manufacturer ID
@@ -389,10 +388,12 @@
if (AsciiStrCmp((CHAR8 *)DataPtr, TPM_HID_TAG) == 0) {
if (PnpHID) {
CopyMem(DataPtr, HID, TPM_HID_PNP_SIZE);
+ //
+ // if HID is PNP ID, patch the last byte in HID TAG to Noop
+ //
+ *(DataPtr + TPM_HID_PNP_SIZE) = AML_NOOP_OP;
} else {
- //
- // NOOP will be patched to '\0'
- //
+
CopyMem(DataPtr, HID, TPM_HID_ACPI_SIZE);
}
DEBUG((EFI_D_INFO, "TPM2 ACPI _HID updated to %a\n", HID));
diff --git a/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.h b/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.h
index 18e8bfc..100804c 100644
--- a/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.h
+++ b/SecurityPkg/Tcg/Tcg2Smm/Tcg2Smm.h
@@ -1,7 +1,7 @@
/** @file
The header file for Tcg2 SMM driver.
-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
@@ -98,7 +98,7 @@
//
// PNP _HID for TPM2 device
//
-#define TPM_HID_TAG "NNN0000"
+#define TPM_HID_TAG "NNNN0000"
#define TPM_HID_PNP_SIZE 8
#define TPM_HID_ACPI_SIZE 9
diff --git a/SecurityPkg/Tcg/Tcg2Smm/Tpm.asl b/SecurityPkg/Tcg/Tcg2Smm/Tpm.asl
index 4128684..cf0642e 100644
--- a/SecurityPkg/Tcg/Tcg2Smm/Tpm.asl
+++ b/SecurityPkg/Tcg/Tcg2Smm/Tpm.asl
@@ -2,7 +2,7 @@
The TPM2 definition block in ACPI table for TCG2 physical presence
and MemoryClear.
-Copyright (c) 2015 - 2016, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2015 - 2017, Intel Corporation. All rights reserved.<BR>
(c)Copyright 2016 HP Development Company, L.P.<BR>
This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
@@ -30,11 +30,11 @@
//
// TCG2
//
- Name (_HID, "NNN0000")
+
//
- // Reserve 1 more byte for ACPI HID
+ // TAG for patching TPM2.0 _HID
//
- Noop
+ Name (_HID, "NNNN0000")
Name (_CID, "MSFT0101")
