BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3902
CcProbeLib is used to probe the Confidential Computing guest type.
This library is designed to run on SEC / PEI / DXE phases. A null
instance of the library always returns CCGuestTypeNonEncrypted.
A platform specific CcProbeLib will be implemented, for example,
in OvmfPkg.
Cc: Michael D Kinney <michael.d.kin...@intel.com>
Cc: Liming Gao <gaolim...@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang....@intel.com>
Cc: James Bottomley <j...@linux.ibm.com>
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Gerd Hoffmann <kra...@redhat.com>
Signed-off-by: Min Xu <min.m...@intel.com>
---
MdePkg/Include/Library/CcProbeLib.h | 26 +++++++++++++++++++
.../Library/CcProbeLibNull/CcProbeLibNull.c | 26 +++++++++++++++++++
.../Library/CcProbeLibNull/CcProbeLibNull.inf | 21 +++++++++++++++
MdePkg/MdePkg.dec | 5 ++++
MdePkg/MdePkg.dsc | 1 +
5 files changed, 79 insertions(+)
create mode 100644 MdePkg/Include/Library/CcProbeLib.h
create mode 100644 MdePkg/Library/CcProbeLibNull/CcProbeLibNull.c
create mode 100644 MdePkg/Library/CcProbeLibNull/CcProbeLibNull.inf
diff --git a/MdePkg/Include/Library/CcProbeLib.h
b/MdePkg/Include/Library/CcProbeLib.h
new file mode 100644
index 000000000000..2857dddfb2d3
--- /dev/null
+++ b/MdePkg/Include/Library/CcProbeLib.h
@@ -0,0 +1,26 @@
+/** @file
+
+Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef CC_PROBE_LIB_H_
+#define CC_PROBE_LIB_H_
+
+#include <ConfidentialComputingGuestAttr.h>
+
+/**
+ Probe the ConfidentialComputing Guest type. See defition of
+ CC_GUEST_TYPE in <ConfidentialComputingGuestAttr.h>.
+
+ @return The guest type
+
+**/
+UINT8
+EFIAPI
+CcProbe (
+ VOID
+ );
+
+#endif
diff --git a/MdePkg/Library/CcProbeLibNull/CcProbeLibNull.c
b/MdePkg/Library/CcProbeLibNull/CcProbeLibNull.c
new file mode 100644
index 000000000000..152d900eb099
--- /dev/null
+++ b/MdePkg/Library/CcProbeLibNull/CcProbeLibNull.c
@@ -0,0 +1,26 @@
+/** @file
+
+ Null stub of CcProbeLib
+
+ Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/CcProbeLib.h>
+
+/**
+ Probe the ConfidentialComputing Guest type. See defition of
+ CC_GUEST_TYPE in <ConfidentialComputingGuestAttr.h>.
+
+ @return The guest type
+
+**/
+UINT8
+EFIAPI
+CcProbe (
+ VOID
+ )
+{
+ return CCGuestTypeNonEncrypted;
+}
diff --git a/MdePkg/Library/CcProbeLibNull/CcProbeLibNull.inf
b/MdePkg/Library/CcProbeLibNull/CcProbeLibNull.inf
new file mode 100644
index 000000000000..f37c25f73439
--- /dev/null
+++ b/MdePkg/Library/CcProbeLibNull/CcProbeLibNull.inf
@@ -0,0 +1,21 @@
+## @file
+# CcProbeLib null instance.
+#
+# Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = CcProbeLibNull
+ FILE_GUID = B15D67FE-0DAC-4316-8E26-8A6b85E43782
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = CcProbeLib
+
+[Sources]
+ CcProbeLibNull.c
+
+[Packages]
+ MdePkg/MdePkg.dec
diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec
index 1934c9840423..faeb28c80cbd 100644
--- a/MdePkg/MdePkg.dec
+++ b/MdePkg/MdePkg.dec
@@ -267,6 +267,11 @@
#
RegisterFilterLib|Include/Library/RegisterFilterLib.h
+ ## @libraryclass This library provides interfances to probe
ConfidentialComputing guest type.
+ #
+ #
+ CcProbeLib|Include/Library/CcProbeLib.h
+
[LibraryClasses.IA32, LibraryClasses.X64, LibraryClasses.AARCH64]
## @libraryclass Provides services to generate random number.
#
diff --git a/MdePkg/MdePkg.dsc b/MdePkg/MdePkg.dsc
index d6a7af412be7..c8d282882ec1 100644
--- a/MdePkg/MdePkg.dsc
+++ b/MdePkg/MdePkg.dsc
@@ -130,6 +130,7 @@
MdePkg/Library/StandaloneMmServicesTableLib/StandaloneMmServicesTableLib.inf
MdePkg/Library/RegisterFilterLibNull/RegisterFilterLibNull.inf
+ MdePkg/Library/CcProbeLibNull/CcProbeLibNull.inf
[Components.IA32, Components.X64, Components.ARM, Components.AARCH64]
#
--
2.29.2.windows.2
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