OvmfPkg/XenAcpiPlatformDxe: remove the QEMU ACPI linker/loader client

The root of the QEMU ACPI linker/loader client in XenAcpiPlatformDxe is
the InstallQemuFwCfgTables() function. This function always fails on Xen,
due to its top-most QemuFwCfgFindFile() call.

Remove the InstallQemuFwCfgTables() function call from XenAcpiPlatformDxe,
along with all dependencies that now become unused.

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: 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: <20210526201446.12554-14-lersek@redhat.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

OvmfPkg/XenAcpiPlatformDxe/AcpiPlatform.h

@@ -11,14 +11,6 @@
 #define ACPI_PLATFORM_H_
 
 #include <Protocol/AcpiTable.h> // EFI_ACPI_TABLE_PROTOCOL
-#include <Protocol/PciIo.h>     // EFI_PCI_IO_PROTOCOL
-
-typedef struct {
-  EFI_PCI_IO_PROTOCOL *PciIo;
-  UINT64              PciAttributes;
-} ORIGINAL_ATTRIBUTES;
-
-typedef struct S3_CONTEXT S3_CONTEXT;
 
 EFI_STATUS
 EFIAPI
@@ -49,54 +41,11 @@ InstallXenTables (
   IN   EFI_ACPI_TABLE_PROTOCOL       *AcpiProtocol
   );
 
-EFI_STATUS
-EFIAPI
-InstallQemuFwCfgTables (
-  IN   EFI_ACPI_TABLE_PROTOCOL       *AcpiProtocol
-  );
-
 EFI_STATUS
 EFIAPI
 InstallAcpiTables (
   IN   EFI_ACPI_TABLE_PROTOCOL       *AcpiTable
   );
 
-VOID
-EnablePciDecoding (
-  OUT ORIGINAL_ATTRIBUTES **OriginalAttributes,
-  OUT UINTN               *Count
-  );
-
-VOID
-RestorePciDecoding (
-  IN ORIGINAL_ATTRIBUTES *OriginalAttributes,
-  IN UINTN               Count
-  );
-
-EFI_STATUS
-AllocateS3Context (
-  OUT S3_CONTEXT **S3Context,
-  IN  UINTN      WritePointerCount
-  );
-
-VOID
-ReleaseS3Context (
-  IN S3_CONTEXT *S3Context
-  );
-
-EFI_STATUS
-SaveCondensedWritePointerToS3Context (
-  IN OUT S3_CONTEXT *S3Context,
-  IN     UINT16     PointerItem,
-  IN     UINT8      PointerSize,
-  IN     UINT32     PointerOffset,
-  IN     UINT64     PointerValue
-  );
-
-EFI_STATUS
-TransferS3ContextToBootScript (
-  IN S3_CONTEXT *S3Context
-  );
-
 #endif