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| author | Anthony PERARD <anthony.perard@citrix.com> | 2019-08-13 12:30:57 +0100 |
|---|---|---|
| committer | Laszlo Ersek <lersek@redhat.com> | 2019-08-21 18:03:49 +0200 |
| commit | f496443eb3d5e58fa8468a96ac10975d52c30071 (patch) | |
| tree | fa3b8f414c1785a41afb40ad0fce3f209f5fd6e8 /OvmfPkg/Library/XenPlatformLib | |
| parent | 60d265451a84804cbbb47620fd5450f41faa1bc5 (diff) | |
| download | edk2-f496443eb3d5e58fa8468a96ac10975d52c30071.tar.gz edk2-f496443eb3d5e58fa8468a96ac10975d52c30071.tar.bz2 edk2-f496443eb3d5e58fa8468a96ac10975d52c30071.zip | |
OvmfPkg/Library/XenPlatformLib: New library
The purpose of XenPlatformLib is to regroup the few functions that are
used in several places to detect if Xen is detected, and to get the
XenInfo HOB.
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1689
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20190813113119.14804-14-anthony.perard@citrix.com>
Diffstat (limited to 'OvmfPkg/Library/XenPlatformLib')
| -rw-r--r-- | OvmfPkg/Library/XenPlatformLib/XenPlatformLib.c | 69 | ||||
| -rw-r--r-- | OvmfPkg/Library/XenPlatformLib/XenPlatformLib.inf | 33 |
2 files changed, 102 insertions, 0 deletions
diff --git a/OvmfPkg/Library/XenPlatformLib/XenPlatformLib.c b/OvmfPkg/Library/XenPlatformLib/XenPlatformLib.c new file mode 100644 index 0000000000..974a0e73f1 --- /dev/null +++ b/OvmfPkg/Library/XenPlatformLib/XenPlatformLib.c @@ -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);
+}
diff --git a/OvmfPkg/Library/XenPlatformLib/XenPlatformLib.inf b/OvmfPkg/Library/XenPlatformLib/XenPlatformLib.inf new file mode 100644 index 0000000000..32adb246d6 --- /dev/null +++ b/OvmfPkg/Library/XenPlatformLib/XenPlatformLib.inf @@ -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
|