BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3902
This is the OvmfPkg specific TdProbeLib. It checks the Ovmf WorkArea
(PcdOvmfWorkAreaBase) to determine if the working system is of Td guest.
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: James Bottomley <james.bottom...@hansenpartnership.com>
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Gerd Hoffmann <kra...@redhat.com>
Cc: Brijesh Singh <brijesh.si...@amd.com>
Cc: Erdem Aktas <erdemak...@google.com>
Cc: Tom Lendacky <thomas.lenda...@amd.com>
Signed-off-by: Min Xu <min.m...@intel.com>
---
OvmfPkg/IntelTdx/TdProbeLib/TdProbeLib.c | 38 ++++++++++++++++++++++
OvmfPkg/IntelTdx/TdProbeLib/TdProbeLib.inf | 25 ++++++++++++++
2 files changed, 63 insertions(+)
create mode 100644 OvmfPkg/IntelTdx/TdProbeLib/TdProbeLib.c
create mode 100644 OvmfPkg/IntelTdx/TdProbeLib/TdProbeLib.inf
diff --git a/OvmfPkg/IntelTdx/TdProbeLib/TdProbeLib.c
b/OvmfPkg/IntelTdx/TdProbeLib/TdProbeLib.c
new file mode 100644
index 000000000000..85b9c5b614e5
--- /dev/null
+++ b/OvmfPkg/IntelTdx/TdProbeLib/TdProbeLib.c
@@ -0,0 +1,38 @@
+/** @file
+
+ TdProbeLib is used to probe the Td guest.
+
+ Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/TdProbeLib.h>
+#include <WorkArea.h>
+#include <ConfidentialComputingGuestAttr.h>
+
+/**
+ Probe if it is Tdx guest.
+
+ @return TD_PROBE_TDX if it is Tdx guest. Otherwise return TD_PROBE_NON.
+
+**/
+UINTN
+EFIAPI
+TdProbe (
+ VOID
+ )
+{
+ OVMF_WORK_AREA *WorkArea;
+
+ WorkArea = (OVMF_WORK_AREA *)FixedPcdGet32 (PcdOvmfWorkAreaBase);
+
+ //
+ // Check if it is TDX guest.
+ //
+ if ((WorkArea != NULL) && (WorkArea->Header.GuestType ==
GUEST_TYPE_INTEL_TDX)) {
+ return TD_PROBE_TDX;
+ } else {
+ return TD_PROBE_NON;
+ }
+}
diff --git a/OvmfPkg/IntelTdx/TdProbeLib/TdProbeLib.inf
b/OvmfPkg/IntelTdx/TdProbeLib/TdProbeLib.inf
new file mode 100644
index 000000000000..7535008b3a51
--- /dev/null
+++ b/OvmfPkg/IntelTdx/TdProbeLib/TdProbeLib.inf
@@ -0,0 +1,25 @@
+## @file
+# TdProbeLib is used to probe Td guest.
+#
+# Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = TdProbeLib
+ FILE_GUID = 05184ec9-abb0-4491-8584-e388639a7c48
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = TdProbeLib
+
+[Sources]
+ TdProbeLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[Pcd]
+ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfWorkAreaBase
--
2.29.2.windows.2
-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#88863): https://edk2.groups.io/g/devel/message/88863
Mute This Topic: https://groups.io/mt/90436751/21656
Group Owner: devel+ow...@edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com]
-=-=-=-=-=-=-=-=-=-=-=-
