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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 13/31] OvmfPkg/Library/XenPlatformLib: New library
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.perard@xxxxxxxxxx>
---
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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