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From: "Min Xu" <min.m.xu@intel.com>
To: devel@edk2.groups.io
Cc: Min Xu <min.m.xu@intel.com>,
	Michael D Kinney <michael.d.kinney@intel.com>,
	Liming Gao <gaoliming@byosoft.com.cn>,
	Zhiguang Liu <zhiguang.liu@intel.com>,
	James Bottomley <jejb@linux.ibm.com>,
	James Bottomley <James.Bottomley@HansenPartnership.com>,
	Jiewen Yao <jiewen.yao@intel.com>,
	Gerd Hoffmann <kraxel@redhat.com>,
	Brijesh Singh <brijesh.singh@amd.com>,
	Erdem Aktas <erdemaktas@google.com>,
	Tom Lendacky <thomas.lendacky@amd.com>
Subject: [PATCH V2 4/6] OvmfPkg: Add CcProbeLib
Date: Fri, 15 Apr 2022 08:07:07 +0800	[thread overview]
Message-ID: <195e8aa1b61fc1dbc5084d1287d6f779482556e6.1649980548.git.min.m.xu@intel.com> (raw)
In-Reply-To: <cover.1649980548.git.min.m.xu@intel.com>

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3902

This is the OvmfPkg specific CcProbeLib. It checks the Ovmf WorkArea
(PcdOvmfWorkAreaBase) to return the guest type.

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
---
 OvmfPkg/Library/CcProbeLib/CcProbeLib.c   | 31 +++++++++++++++++++++++
 OvmfPkg/Library/CcProbeLib/CcProbeLib.inf | 25 ++++++++++++++++++
 2 files changed, 56 insertions(+)
 create mode 100644 OvmfPkg/Library/CcProbeLib/CcProbeLib.c
 create mode 100644 OvmfPkg/Library/CcProbeLib/CcProbeLib.inf

diff --git a/OvmfPkg/Library/CcProbeLib/CcProbeLib.c b/OvmfPkg/Library/CcProbeLib/CcProbeLib.c
new file mode 100644
index 000000000000..b4babcb423f7
--- /dev/null
+++ b/OvmfPkg/Library/CcProbeLib/CcProbeLib.c
@@ -0,0 +1,31 @@
+/** @file
+
+  CcProbeLib is used to probe the Confidential computing guest type.
+
+  Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/CcProbeLib.h>
+#include <WorkArea.h>
+
+/**
+  Probe the ConfidentialComputing Guest type. See defition of
+  CC_GUEST_TYPE in <ConfidentialComputingGuestAttr.h>.
+
+  @return The guest type
+
+**/
+UINT8
+EFIAPI
+CcProbe (
+  VOID
+  )
+{
+  OVMF_WORK_AREA  *WorkArea;
+
+  WorkArea = (OVMF_WORK_AREA *)FixedPcdGet32 (PcdOvmfWorkAreaBase);
+
+  return WorkArea != NULL ? WorkArea->Header.GuestType : CCGuestTypeNonEncrypted;
+}
diff --git a/OvmfPkg/Library/CcProbeLib/CcProbeLib.inf b/OvmfPkg/Library/CcProbeLib/CcProbeLib.inf
new file mode 100644
index 000000000000..5300c9ba2644
--- /dev/null
+++ b/OvmfPkg/Library/CcProbeLib/CcProbeLib.inf
@@ -0,0 +1,25 @@
+## @file
+# CcProbeLib is used to probe Confidential Computing guest type.
+#
+#  Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = CcProbeLib
+  FILE_GUID                      = 05184ec9-abb0-4491-8584-e388639a7c48
+  MODULE_TYPE                    = BASE
+  VERSION_STRING                 = 1.0
+  LIBRARY_CLASS                  = CcProbeLib
+
+[Sources]
+  CcProbeLib.c
+
+[Packages]
+  MdePkg/MdePkg.dec
+  OvmfPkg/OvmfPkg.dec
+
+[Pcd]
+  gUefiOvmfPkgTokenSpaceGuid.PcdOvmfWorkAreaBase
-- 
2.29.2.windows.2


  parent reply	other threads:[~2022-04-15  0:07 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-15  0:07 [PATCH V2 0/6] Introduce CcProbe in MdePkg Min Xu
2022-04-15  0:07 ` [PATCH V2 1/6] MdePkg: Add CC_GUEST_TYPE in ConfidentialComputingGuestAttr.h Min Xu
2022-04-15  0:07 ` [PATCH V2 2/6] OvmfPkg: Replace GUEST_TYPE with CC_GUEST_TYPE Min Xu
2022-04-15  0:07 ` [PATCH V2 3/6] MdePkg: Add CcProbeLib Min Xu
2022-04-15  0:07 ` Min Xu [this message]
2022-04-15  0:07 ` [PATCH V2 5/6] MdePkg: Probe Cc guest in BaseIoLibIntrinsicSev Min Xu
2022-05-16 22:22   ` [edk2-devel] " dann frazier
2022-05-17  1:15     ` Min Xu
2022-05-17  7:58       ` Min Xu
2022-04-15  0:07 ` [PATCH V2 6/6] OvmfPkg: Add CcProbeLib in *.dsc Min Xu

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