@@ -70,6 +70,10 @@ [LibraryClasses]
#
XenIoMmioLib|Include/Library/XenIoMmioLib.h
+ ## @libraryclass Get information about Xen
+ #
+ XenPlatformLib|Include/Library/XenPlatformLib.h
+
[Guids]
gUefiOvmfPkgTokenSpaceGuid = {0x93bb96af, 0xb9f2, 0x4eb8, {0x94, 0x62, 0xe0, 0xba, 0x74, 0x56, 0x42, 0x36}}
gEfiXenInfoGuid = {0xd3b46f3b, 0xd441, 0x1244, {0x9a, 0x12, 0x0, 0x12, 0x27, 0x3f, 0xc1, 0x4d}}
@@ -194,6 +194,7 @@ [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
TpmMeasurementLib|MdeModulePkg/Library/TpmMeasurementLibNull/TpmMeasurementLibNull.inf
new file mode 100644
@@ -0,0 +1,33 @@
+## @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.
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = XenPlatformLib
+ FILE_GUID = DB54DBB7-8142-4EE5-9364-78C824B582EB
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = XenPlatformLib
+
+[Sources]
+ XenPlatformLib.c
+
+[Packages]
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+ HobLib
+
+[Guids]
+ gEfiXenInfoGuid
new file mode 100644
@@ -0,0 +1,53 @@
+/** @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.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#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 has 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
new file mode 100644
@@ -0,0 +1,69 @@
+/** @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.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#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 has 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);
+}
@@ -365,6 +365,7 @@ F: OvmfPkg/Include/Guid/XenInfo.h
F: OvmfPkg/Include/IndustryStandard/Xen/
F: OvmfPkg/Include/Library/XenHypercallLib.h
F: OvmfPkg/Include/Library/XenIoMmioLib.h
+F: OvmfPkg/Include/Library/XenPlatformLib.h
F: OvmfPkg/Include/Protocol/XenBus.h
F: OvmfPkg/Include/Protocol/XenIo.h
F: OvmfPkg/Library/PciHostBridgeLib/XenSupport.c
@@ -372,6 +373,7 @@ F: OvmfPkg/Library/PlatformBootManagerLib/BdsPlatform.c
F: OvmfPkg/Library/XenConsoleSerialPortLib/
F: OvmfPkg/Library/XenHypercallLib/
F: OvmfPkg/Library/XenIoMmioLib/
+F: OvmfPkg/Library/XenPlatformLib/
F: OvmfPkg/OvmfXen.*
F: OvmfPkg/OvmfXenElfHeaderGenerator.c
F: OvmfPkg/PlatformPei/MemDetect.c