ArmVirtPkg/PlatformHasAcpiDtDxe: Move to OvmfPkg

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4076

This module is required by other architectures like RISC-V.
Hence, move this to OvmfPkg.

Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Andrei Warkentin <andrei.warkentin@intel.com>

OvmfPkg/OvmfPkg.dec

@@ -161,6 +161,7 @@
   gVMMBootOrderGuid                     = {0x668f4529, 0x63d0, 0x4bb5, {0xb6, 0x5d, 0x6f, 0xbb, 0x9d, 0x36, 0xa4, 0x4a}}
   gUefiOvmfPkgTdxAcpiHobGuid            = {0x6a0c5870, 0xd4ed, 0x44f4, {0xa1, 0x35, 0xdd, 0x23, 0x8b, 0x6f, 0x0c, 0x8d}}
   gEfiNonCcFvGuid                       = {0xae047c6d, 0xbce9, 0x426c, {0xae, 0x03, 0xa6, 0x8e, 0x3b, 0x8a, 0x04, 0x88}}
+  gOvmfVariableGuid                     = {0x50bea1e5, 0xa2c5, 0x46e9, {0x9b, 0x3a, 0x59, 0x59, 0x65, 0x16, 0xb0, 0x0a}}
 
 [Ppis]
   # PPI whose presence in the PPI database signals that the TPM base address
@@ -467,6 +468,12 @@
   #    2 - set by GOP Driver.
   gUefiOvmfPkgTokenSpaceGuid.PcdVideoResolutionSource|0|UINT8|0x64
 
+  #
+  # Whether to force disable ACPI, regardless of the fw_cfg settings
+  # exposed by QEMU
+  #
+  gUefiOvmfPkgTokenSpaceGuid.PcdForceNoAcpi|0x0|BOOLEAN|0x69
+
 [PcdsFeatureFlag]
   gUefiOvmfPkgTokenSpaceGuid.PcdQemuBootOrderPciTranslation|TRUE|BOOLEAN|0x1c
   gUefiOvmfPkgTokenSpaceGuid.PcdQemuBootOrderMmioTranslation|FALSE|BOOLEAN|0x1d

OvmfPkg/PlatformHasAcpiDtDxe/PlatformHasAcpiDtDxe.c

@@ -0,0 +1,83 @@
+/** @file
+  Decide whether the firmware should expose an ACPI- and/or a Device Tree-based
+  hardware description to the operating system.
+
+  Copyright (c) 2017, Red Hat, Inc.
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Guid/PlatformHasAcpi.h>
+#include <Guid/PlatformHasDeviceTree.h>
+#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
+#include <Library/QemuFwCfgLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+
+EFI_STATUS
+EFIAPI
+PlatformHasAcpiDt (
+  IN EFI_HANDLE        ImageHandle,
+  IN EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS            Status;
+  FIRMWARE_CONFIG_ITEM  FwCfgItem;
+  UINTN                 FwCfgSize;
+
+  //
+  // If we fail to install any of the necessary protocols below, the OS will be
+  // unbootable anyway (due to lacking hardware description), so tolerate no
+  // errors here.
+  //
+  if ((MAX_UINTN == MAX_UINT64) &&
+      !PcdGetBool (PcdForceNoAcpi) &&
+      !EFI_ERROR (
+         QemuFwCfgFindFile (
+           "etc/table-loader",
+           &FwCfgItem,
+           &FwCfgSize
+           )
+         ))
+  {
+    //
+    // Only make ACPI available on 64-bit systems, and only if QEMU generates
+    // (a subset of) the ACPI tables.
+    //
+    Status = gBS->InstallProtocolInterface (
+                    &ImageHandle,
+                    &gEdkiiPlatformHasAcpiGuid,
+                    EFI_NATIVE_INTERFACE,
+                    NULL
+                    );
+    if (EFI_ERROR (Status)) {
+      goto Failed;
+    }
+
+    return Status;
+  }
+
+  //
+  // Expose the Device Tree otherwise.
+  //
+  Status = gBS->InstallProtocolInterface (
+                  &ImageHandle,
+                  &gEdkiiPlatformHasDeviceTreeGuid,
+                  EFI_NATIVE_INTERFACE,
+                  NULL
+                  );
+  if (EFI_ERROR (Status)) {
+    goto Failed;
+  }
+
+  return Status;
+
+Failed:
+  ASSERT_EFI_ERROR (Status);
+  CpuDeadLoop ();
+  //
+  // Keep compilers happy.
+  //
+  return Status;
+}

OvmfPkg/PlatformHasAcpiDtDxe/PlatformHasAcpiDtDxe.inf

@@ -0,0 +1,43 @@
+## @file
+# Decide whether the firmware should expose an ACPI- and/or a Device Tree-based
+# hardware description to the operating system.
+#
+# Copyright (c) 2017, Red Hat, Inc.
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+  INF_VERSION                    = 1.25
+  BASE_NAME                      = PlatformHasAcpiDtDxe
+  FILE_GUID                      = 9d1dd27f-6d7f-427b-aec4-b62f6279c2f1
+  MODULE_TYPE                    = DXE_DRIVER
+  VERSION_STRING                 = 1.0
+  ENTRY_POINT                    = PlatformHasAcpiDt
+
+[Sources]
+  PlatformHasAcpiDtDxe.c
+
+[Packages]
+  EmbeddedPkg/EmbeddedPkg.dec
+  MdeModulePkg/MdeModulePkg.dec
+  MdePkg/MdePkg.dec
+  OvmfPkg/OvmfPkg.dec
+
+[LibraryClasses]
+  BaseLib
+  DebugLib
+  PcdLib
+  QemuFwCfgLib
+  UefiBootServicesTableLib
+  UefiDriverEntryPoint
+
+[Guids]
+  gEdkiiPlatformHasAcpiGuid       ## SOMETIMES_PRODUCES ## PROTOCOL
+  gEdkiiPlatformHasDeviceTreeGuid ## SOMETIMES_PRODUCES ## PROTOCOL
+
+[Pcd]
+  gUefiOvmfPkgTokenSpaceGuid.PcdForceNoAcpi
+
+[Depex]
+  gEfiVariableArchProtocolGuid