OvmfPkg/XenAcpiPlatformDxe: create from AcpiPlatformDxe

Create an almost verbatim copy of the
"OvmfPkg/AcpiPlatformDxe/AcpiPlatformDxe.inf" driver for the OvmfXen
platform. We're going to trim the driver in subsequent patches.
Ultimately, the XenAcpiPlatformDxe driver will duplicate a negligible
amount of code that is currently present in the QemuFwCfgAcpiPlatformDxe
driver.

List the new driver in "Maintainers.txt", in the "OvmfPkg: Xen-related
modules" section.

Switch the OvmfXen platform to the new driver at once.

This patch should be reviewed with "git show --find-copies-harder".

Cc: Andrew Fish <afish@apple.com>
Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Julien Grall <julien@xen.org>
Cc: Leif Lindholm <leif@nuviainc.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2122
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20210526201446.12554-12-lersek@redhat.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>

OvmfPkg/XenAcpiPlatformDxe/XenAcpiPlatformDxe.inf

@@ -0,0 +1,70 @@
+## @file
+#  OVMF ACPI Platform Driver for Xen guests
+#
+#  Copyright (C) 2021, Red Hat, Inc.
+#  Copyright (c) 2008 - 2019, Intel Corporation. All rights reserved.<BR>
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  INF_VERSION                    = 0x00010005
+  BASE_NAME                      = XenAcpiPlatform
+  FILE_GUID                      = fa0a48ac-767d-4c88-b70c-ec54c8b900c4
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = AcpiPlatformEntryPoint
+
+#
+# The following information is for reference only and not required by the build tools.
+#
+#  VALID_ARCHITECTURES           = IA32 X64 EBC
+#
+
+[Sources]
+  AcpiPlatform.c
+  AcpiPlatform.h
+  BootScript.c
+  EntryPoint.c
+  PciDecoding.c
+  Qemu.c
+  QemuFwCfgAcpi.c
+  Xen.c
+
+[Packages]
+  MdeModulePkg/MdeModulePkg.dec
+  MdePkg/MdePkg.dec
+  OvmfPkg/OvmfPkg.dec
+  UefiCpuPkg/UefiCpuPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  BaseMemoryLib
+  DebugLib
+  DxeServicesTableLib
+  MemoryAllocationLib
+  OrderedCollectionLib
+  PcdLib
+  QemuFwCfgLib
+  QemuFwCfgS3Lib
+  UefiBootServicesTableLib
+  UefiDriverEntryPoint
+  XenPlatformLib
+
+[Protocols]
+  gEfiAcpiTableProtocolGuid                     # PROTOCOL ALWAYS_CONSUMED
+  gEfiFirmwareVolume2ProtocolGuid               # PROTOCOL SOMETIMES_CONSUMED
+  gEfiPciIoProtocolGuid                         # PROTOCOL SOMETIMES_CONSUMED
+
+[Guids]
+  gRootBridgesConnectedEventGroupGuid
+
+[Pcd]
+  gEfiMdeModulePkgTokenSpaceGuid.PcdAcpiTableStorageFile
+  gEfiMdeModulePkgTokenSpaceGuid.PcdPciDisableBusEnumeration
+  gUefiCpuPkgTokenSpaceGuid.PcdCpuLocalApicBaseAddress
+  gUefiOvmfPkgTokenSpaceGuid.Pcd8259LegacyModeEdgeLevel
+  gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFdBaseAddress
+
+[Depex]
+  gEfiAcpiTableProtocolGuid