The purpose of XenPlatformPei is to regroup the few functions that are
used in several places to detect if Xen is detected, and to get the
XenInfo HOB.
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Anthony PERARD <anthony.per...@citrix.com>
---
OvmfPkg/XenOvmf.dsc
| 1 +
MdePkg/Library/BaseSmbusLibNull/BaseSmbusLibNull.inf =>
OvmfPkg/Library/XenPlatformLib/XenPlatformLib.inf | 27 +++----
OvmfPkg/Include/Library/XenPlatformLib.h
| 59 +++++++++++++++
OvmfPkg/Library/XenPlatformLib/XenPlatformLib.c
| 75 ++++++++++++++++++++
4 files changed, 150 insertions(+), 12 deletions(-)
diff --git a/OvmfPkg/XenOvmf.dsc b/OvmfPkg/XenOvmf.dsc
index cc51bac3be..9529b4834f 100644
--- a/OvmfPkg/XenOvmf.dsc
+++ b/OvmfPkg/XenOvmf.dsc
@@ -198,6 +198,7 @@ [LibraryClasses]
SmbusLib|MdePkg/Library/BaseSmbusLibNull/BaseSmbusLibNull.inf
OrderedCollectionLib|MdePkg/Library/BaseOrderedCollectionRedBlackTreeLib/BaseOrderedCollectionRedBlackTreeLib.inf
XenHypercallLib|OvmfPkg/Library/XenHypercallLib/XenHypercallLib.inf
+ XenPlatformLib|OvmfPkg/Library/XenPlatformLib/XenPlatformLib.inf
Tcg2PhysicalPresenceLib|OvmfPkg/Library/Tcg2PhysicalPresenceLibNull/DxeTcg2PhysicalPresenceLib.inf
diff --git a/MdePkg/Library/BaseSmbusLibNull/BaseSmbusLibNull.inf
b/OvmfPkg/Library/XenPlatformLib/XenPlatformLib.inf
similarity index 56%
copy from MdePkg/Library/BaseSmbusLibNull/BaseSmbusLibNull.inf
copy to OvmfPkg/Library/XenPlatformLib/XenPlatformLib.inf
index 4fd4874595..ca078f7263 100644
--- a/MdePkg/Library/BaseSmbusLibNull/BaseSmbusLibNull.inf
+++ b/OvmfPkg/Library/XenPlatformLib/XenPlatformLib.inf
@@ -1,7 +1,10 @@
## @file
-# Null implementation of the SMBUS Library.
+# Get information about Xen
#
-# Copyright (c) 2013 - 2018, Intel Corporation. All rights reserved.<BR>
+# This library simply allow to find out if OVMF is running under Xen and
+# allow to get more information when it is the case.
+#
+# Copyright (c) 2019, Citrix Systems, Inc.
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD
License
@@ -10,26 +13,26 @@
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR
IMPLIED.
#
+#
##
[Defines]
INF_VERSION = 0x00010005
- BASE_NAME = BaseSmbusLibNull
- MODULE_UNI_FILE = BaseSmbusLibNull.uni
- FILE_GUID = E2ECA273-A1C0-407E-9A5C-F10C55142196
+ BASE_NAME = XenPlatformLib
+ FILE_GUID = DB54DBB7-8142-4EE5-9364-78C824B582EB
MODULE_TYPE = BASE
VERSION_STRING = 1.0
- LIBRARY_CLASS = SmbusLib
-
-#
-# VALID_ARCHITECTURES = IA32 X64 EBC
-#
+ LIBRARY_CLASS = XenPlatformLib
[Sources]
- BaseSmbusLibNull.c
+ XenPlatformLib.c
[Packages]
MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
[LibraryClasses]
- DebugLib
+ HobLib
+
+[Guids]
+ gEfiXenInfoGuid
diff --git a/OvmfPkg/Include/Library/XenPlatformLib.h
b/OvmfPkg/Include/Library/XenPlatformLib.h
new file mode 100644
index 0000000000..8f57450575
--- /dev/null
+++ b/OvmfPkg/Include/Library/XenPlatformLib.h
@@ -0,0 +1,59 @@
+/** @file
+* Get information about Xen
+*
+* This library simply allow to find out if OVMF is running under Xen and
+* allow to get more information when it is the case.
+*
+* Copyright (c) 2019, Citrix Systems, Inc.
+*
+* 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
+* http://opensource.org/licenses/bsd-license.php
+*
+* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR
IMPLIED.
+*
+**/
+
+#ifndef _XEN_PLATFORM_LIB_H_
+#define _XEN_PLATFORM_LIB_H_
+
+#include <Guid/XenInfo.h>
+
+/**
+ This function detects if OVMF is running on Xen.
+
+ @retval TRUE OVMF is running on Xen
+ @retval FALSE Xen as not been detected
+**/
+BOOLEAN
+EFIAPI
+XenDetected (
+ VOID
+ );
+
+/**
+ This function detect if OVMF have started via the PVH entry point.
+
+ @retval TRUE PVH entry point as been used
+ @retval FALSE OVMF have started via the HVM route
+**/
+BOOLEAN
+EFIAPI
+XenPvhDetected (
+ VOID
+ );
+
+/**
+ This function return a pointer to the XenInfo HOB.
+
+ @return XenInfo pointer or NULL if not available
+**/
+EFI_XEN_INFO *
+EFIAPI
+XenGetInfoHOB (
+ VOID
+ );
+
+#endif
diff --git a/OvmfPkg/Library/XenPlatformLib/XenPlatformLib.c
b/OvmfPkg/Library/XenPlatformLib/XenPlatformLib.c
new file mode 100644
index 0000000000..274ddfc9ad
--- /dev/null
+++ b/OvmfPkg/Library/XenPlatformLib/XenPlatformLib.c
@@ -0,0 +1,75 @@
+/** @file
+* Get information about Xen
+*
+* This library simply allow to find out if OVMF is running under Xen and
+* allow to get more information when it is the case.
+*
+* Copyright (c) 2019, Citrix Systems, Inc.
+*
+* 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
+* http://opensource.org/licenses/bsd-license.php
+*
+* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR
IMPLIED.
+*
+**/
+
+#include <PiDxe.h>
+#include <Library/HobLib.h>
+#include <Library/XenPlatformLib.h>
+
+/**
+ This function return a pointer to the XenInfo HOB.
+
+ @return XenInfo pointer or NULL if not available
+**/
+EFI_XEN_INFO *
+EFIAPI
+XenGetInfoHOB (
+ VOID
+ )
+{
+ EFI_HOB_GUID_TYPE *GuidHob;
+
+ GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);
+ if (GuidHob == NULL) {
+ return NULL;
+ }
+
+ return (EFI_XEN_INFO *) GET_GUID_HOB_DATA (GuidHob);
+}
+
+/**
+ This function detects if OVMF is running on Xen.
+
+ @retval TRUE OVMF is running on Xen
+ @retval FALSE Xen as not been detected
+**/
+BOOLEAN
+EFIAPI
+XenDetected (
+ VOID
+ )
+{
+ return (XenGetInfoHOB () != NULL);
+}
+
+/**
+ This function detect if OVMF have started via the PVH entry point.
+
+ @retval TRUE PVH entry point as been used
+ @retval FALSE OVMF have started via the HVM route
+**/
+BOOLEAN
+EFIAPI
+XenPvhDetected (
+ VOID
+ )
+{
+ EFI_XEN_INFO *XenInfo;
+
+ XenInfo = XenGetInfoHOB ();
+ return (XenInfo != NULL && XenInfo->RsdpPvh != NULL);
+}
--
Anthony PERARD
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