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| author | Anthony PERARD <anthony.perard@citrix.com> | 2019-08-13 12:31:17 +0100 |
|---|---|---|
| committer | Laszlo Ersek <lersek@redhat.com> | 2019-08-21 18:03:50 +0200 |
| commit | 833cd3e0c0f948670fc639721b2767f31c36e359 (patch) | |
| tree | bc9d1b3f8065d94a46d78b7f8e4a04ca7c8a81a7 /OvmfPkg/XenIoPvhDxe | |
| parent | 8f39d79d6533030baf0e579787997cd0fae3750a (diff) | |
| download | edk2-833cd3e0c0f948670fc639721b2767f31c36e359.tar.gz edk2-833cd3e0c0f948670fc639721b2767f31c36e359.tar.bz2 edk2-833cd3e0c0f948670fc639721b2767f31c36e359.zip | |
OvmfPkg: Introduce XenIoPvhDxe to initialize Grant Tables
XenIoPvhDxe use XenIoMmioLib to reserve some space to be use by the
Grant Tables.
The call is only done if it is necessary, we simply detect if the
guest is PVH, as in this case there is currently no PCI bus, and no
PCI Xen platform device which would start the XenIoPciDxe and allocate
the space for the Grant Tables.
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: <20190813113119.14804-34-anthony.perard@citrix.com>
Diffstat (limited to 'OvmfPkg/XenIoPvhDxe')
| -rw-r--r-- | OvmfPkg/XenIoPvhDxe/XenIoPvhDxe.c | 54 | ||||
| -rw-r--r-- | OvmfPkg/XenIoPvhDxe/XenIoPvhDxe.inf | 36 |
2 files changed, 90 insertions, 0 deletions
diff --git a/OvmfPkg/XenIoPvhDxe/XenIoPvhDxe.c b/OvmfPkg/XenIoPvhDxe/XenIoPvhDxe.c new file mode 100644 index 0000000000..9264a85df1 --- /dev/null +++ b/OvmfPkg/XenIoPvhDxe/XenIoPvhDxe.c @@ -0,0 +1,54 @@ +/** @file
+
+ Driver for the XenIo protocol
+
+ This driver simply allocate space for the grant tables.
+
+ Copyright (c) 2019, Citrix Systems, Inc.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Library/MemoryAllocationLib.h>
+#include <Library/PcdLib.h>
+#include <Library/XenIoMmioLib.h>
+#include <Library/XenPlatformLib.h>
+
+EFI_STATUS
+EFIAPI
+InitializeXenIoPvhDxe (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ VOID *Allocation;
+ EFI_STATUS Status;
+ EFI_HANDLE XenIoHandle;
+
+ Allocation = NULL;
+ XenIoHandle = NULL;
+
+ if (!XenPvhDetected ()) {
+ return EFI_UNSUPPORTED;
+ }
+
+ Allocation = AllocateReservedPages (FixedPcdGet32 (PcdXenGrantFrames));
+ if (Allocation == NULL) {
+ Status = EFI_OUT_OF_RESOURCES;
+ goto Error;
+ }
+
+ Status = XenIoMmioInstall (&XenIoHandle, (UINTN) Allocation);
+ if (EFI_ERROR (Status)) {
+ goto Error;
+ }
+
+ return EFI_SUCCESS;
+
+Error:
+ if (Allocation != NULL) {
+ FreePages (Allocation, FixedPcdGet32 (PcdXenGrantFrames));
+ }
+ return Status;
+}
diff --git a/OvmfPkg/XenIoPvhDxe/XenIoPvhDxe.inf b/OvmfPkg/XenIoPvhDxe/XenIoPvhDxe.inf new file mode 100644 index 0000000000..1c27f8aae0 --- /dev/null +++ b/OvmfPkg/XenIoPvhDxe/XenIoPvhDxe.inf @@ -0,0 +1,36 @@ +## @file
+# Driver for the XenIo protocol
+#
+# Copyright (c) 2019, Citrix Systems, Inc.
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+ INF_VERSION = 0x00010005
+ BASE_NAME = XenIoPvhDxe
+ FILE_GUID = 7a567cc4-0e75-4d7a-a305-c3db109b53ad
+ MODULE_TYPE = DXE_DRIVER
+ VERSION_STRING = 1.0
+ ENTRY_POINT = InitializeXenIoPvhDxe
+
+[Packages]
+ MdePkg/MdePkg.dec
+ OvmfPkg/OvmfPkg.dec
+
+[Sources]
+ XenIoPvhDxe.c
+
+[LibraryClasses]
+ MemoryAllocationLib
+ PcdLib
+ UefiDriverEntryPoint
+ XenIoMmioLib
+ XenPlatformLib
+
+[FixedPcd]
+ gUefiOvmfPkgTokenSpaceGuid.PcdXenGrantFrames
+
+[Depex]
+ TRUE
|