OvmfPkg/SmbiosPlatformDxe: split GetXenSmbiosTables() decl. to new header

Move the declaration of the GetXenSmbiosTables() function to a new header
file called "XenSmbiosPlatformDxe.h". (The only declaration that remains
in "SmbiosPlatformDxe.h" for now is that of GetQemuSmbiosTables().)

Modify the pattern in "Maintainers.txt" so that the new file be covered in
the "OvmfPkg: Xen-related modules" section.

This patch is best viewed with "git show --no-renames".

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: <20210526201446.12554-40-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>

Maintainers.txt

@@ -493,7 +493,7 @@ F: OvmfPkg/Library/XenPlatformLib/
 F: OvmfPkg/Library/XenRealTimeClockLib/
 F: OvmfPkg/OvmfXen.*
 F: OvmfPkg/OvmfXenElfHeaderGenerator.c
-F: OvmfPkg/SmbiosPlatformDxe/*Xen.c
+F: OvmfPkg/SmbiosPlatformDxe/*Xen*
 F: OvmfPkg/XenAcpiPlatformDxe/
 F: OvmfPkg/XenBusDxe/
 F: OvmfPkg/XenIoPciDxe/

OvmfPkg/SmbiosPlatformDxe/ArmXen.c

@@ -8,7 +8,7 @@
   SPDX-License-Identifier: BSD-2-Clause-Patent
 **/
 
-#include "SmbiosPlatformDxe.h"
+#include "XenSmbiosPlatformDxe.h"
 
 /**
   Locates the Xen SMBIOS data if it exists

OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.c

@@ -15,6 +15,7 @@
 #include <Protocol/Smbios.h>                  // EFI_SMBIOS_PROTOCOL
 
 #include "SmbiosPlatformDxe.h"
+#include "XenSmbiosPlatformDxe.h"
 
 #define TYPE0_STRINGS \
   "EFI Development Kit II / OVMF\0"     /* Vendor */ \

OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.h

@@ -11,20 +11,6 @@
 #ifndef SMBIOS_PLATFORM_DXE_H_
 #define SMBIOS_PLATFORM_DXE_H_
 
-#include <IndustryStandard/SmBios.h> // SMBIOS_TABLE_ENTRY_POINT
-
-/**
-  Locates the Xen SMBIOS data if it exists
-
-  @return SMBIOS_TABLE_ENTRY_POINT   Address of Xen SMBIOS data
-
-**/
-SMBIOS_TABLE_ENTRY_POINT *
-GetXenSmbiosTables (
-  VOID
-  );
-
-
 /**
   Locates and extracts the QEMU SMBIOS table data if present in fw_cfg
 

OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf

@@ -27,6 +27,7 @@
   Qemu.c
   SmbiosPlatformDxe.c
   SmbiosPlatformDxe.h
+  XenSmbiosPlatformDxe.h
 
 [Sources.IA32, Sources.X64]
   X86Xen.c

OvmfPkg/SmbiosPlatformDxe/X86Xen.c

@@ -12,7 +12,7 @@
 #include <Library/HobLib.h>  // GetFirstGuidHob()
 #include <Pi/PiHob.h>        // EFI_HOB_GUID_TYPE
 
-#include "SmbiosPlatformDxe.h"
+#include "XenSmbiosPlatformDxe.h"
 
 #define XEN_SMBIOS_PHYSICAL_ADDRESS       0x000EB000
 #define XEN_SMBIOS_PHYSICAL_END           0x000F0000

OvmfPkg/SmbiosPlatformDxe/XenSmbiosPlatformDxe.h

@@ -0,0 +1,28 @@
+/** @file
+  This driver installs SMBIOS information for OVMF on Xen
+
+  Copyright (C) 2021, Red Hat, Inc.
+  Copyright (c) 2011, Bei Guan <gbtju85@gmail.com>
+  Copyright (c) 2011, Intel Corporation. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#ifndef XEN_SMBIOS_PLATFORM_DXE_H_
+#define XEN_SMBIOS_PLATFORM_DXE_H_
+
+#include <IndustryStandard/SmBios.h> // SMBIOS_TABLE_ENTRY_POINT
+
+/**
+  Locates the Xen SMBIOS data if it exists
+
+  @return SMBIOS_TABLE_ENTRY_POINT   Address of Xen SMBIOS data
+
+**/
+SMBIOS_TABLE_ENTRY_POINT *
+GetXenSmbiosTables (
+  VOID
+  );
+
+#endif