OvmfPkg/IntelTdx: Enable separate-fv in IntelTdx/IntelTdxX64.fdf

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4152

In current DXE FV there are 100+ drivers. Some of the drivers are not
used in Td guest. (Such as USB support drivers, network related drivers,
etc).

From the security perspective if a driver is not used, we'd should prevent
it from being loaded / started. There are 2 benefits:
1. Reduce the attack surface
2. Improve the boot performance

So we separate DXEFV into 2 FVs: DXEFV and NCCFV. All the drivers which
are not needed by a Confidential Computing guest are moved from DXEFV
to NCCFV.

The following patch will find NCCFV for non-cc guest and build FVHob
so that NCCFV drivers can be loaded / started in DXE phase.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Min Xu <min.m.xu@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>

OvmfPkg/IntelTdx/IntelTdxX64.dsc

@@ -31,6 +31,11 @@
   #
   DEFINE SECURE_BOOT_ENABLE      = FALSE
 
+  #
+  # Shell can be useful for debugging but should not be enabled for production
+  #
+  DEFINE BUILD_SHELL             = TRUE
+
   #
   # Device drivers
   #
@@ -204,7 +209,9 @@
   VariablePolicyHelperLib|MdeModulePkg/Library/VariablePolicyHelperLib/VariablePolicyHelperLib.inf
   VariableFlashInfoLib|MdeModulePkg/Library/BaseVariableFlashInfoLib/BaseVariableFlashInfoLib.inf
 
+!if $(BUILD_SHELL) == TRUE
   ShellLib|ShellPkg/Library/UefiShellLib/UefiShellLib.inf
+!endif
   ShellCEntryLib|ShellPkg/Library/UefiShellCEntryLib/UefiShellCEntryLib.inf
   S3BootScriptLib|MdeModulePkg/Library/PiDxeS3BootScriptLib/DxeS3BootScriptLib.inf
   SmbusLib|MdePkg/Library/BaseSmbusLibNull/BaseSmbusLibNull.inf
@@ -720,12 +727,13 @@
   MdeModulePkg/Bus/Usb/UsbKbDxe/UsbKbDxe.inf
   MdeModulePkg/Bus/Usb/UsbMassStorageDxe/UsbMassStorageDxe.inf
 
-!if $(TOOL_CHAIN_TAG) != "XCODE5"
+!if $(TOOL_CHAIN_TAG) != "XCODE5" && $(BUILD_SHELL) == TRUE
   OvmfPkg/LinuxInitrdDynamicShellCommand/LinuxInitrdDynamicShellCommand.inf {
     <PcdsFixedAtBuild>
       gEfiShellPkgTokenSpaceGuid.PcdShellLibAutoInitialize|FALSE
   }
 !endif
+!if $(BUILD_SHELL) == TRUE
   ShellPkg/Application/Shell/Shell.inf {
     <LibraryClasses>
       ShellCommandLib|ShellPkg/Library/UefiShellCommandLib/UefiShellCommandLib.inf
@@ -744,6 +752,7 @@
       gEfiShellPkgTokenSpaceGuid.PcdShellLibAutoInitialize|FALSE
       gEfiMdePkgTokenSpaceGuid.PcdUefiLibMaxPrintBufferSize|8000
   }
+!endif
 
 !if $(SECURE_BOOT_ENABLE) == TRUE
   SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf

OvmfPkg/IntelTdx/IntelTdxX64.fdf

@@ -97,10 +97,14 @@ gUefiOvmfPkgTokenSpaceGuid.PcdOvmfCpuidBase|gUefiOvmfPkgTokenSpaceGuid.PcdOvmfCp
 0x010000|0x010000
 gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamBase|gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamSize
 
-0x100000|0xC00000
+0x100000|0x700000
 gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvBase|gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvSize
 FV = DXEFV
 
+0x800000|0x500000
+gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeNonCcFvBase|gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeNonCcFvSize
+FV = NCCFV
+
 ##########################################################################################
 # Set the SEV-ES specific work area PCDs
 #
@@ -183,7 +187,6 @@ INF  MdeModulePkg/Universal/PCD/Dxe/Pcd.inf
 
 INF  MdeModulePkg/Core/RuntimeDxe/RuntimeDxe.inf
 INF  MdeModulePkg/Universal/SecurityStubDxe/SecurityStubDxe.inf
-INF  MdeModulePkg/Universal/EbcDxe/EbcDxe.inf
 INF  UefiCpuPkg/CpuIo2Dxe/CpuIo2Dxe.inf
 
 INF  UefiCpuPkg/CpuDxe/CpuDxe.inf
@@ -201,6 +204,86 @@ INF  PcAtChipsetPkg/PcatRealTimeClockRuntimeDxe/PcatRealTimeClockRuntimeDxe.inf
 INF  OvmfPkg/VirtioPciDeviceDxe/VirtioPciDeviceDxe.inf
 INF  OvmfPkg/Virtio10Dxe/Virtio10.inf
 INF  OvmfPkg/VirtioBlkDxe/VirtioBlk.inf
+
+!if $(SECURE_BOOT_ENABLE) == TRUE
+  INF  SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf
+!endif
+
+INF  MdeModulePkg/Universal/WatchdogTimerDxe/WatchdogTimer.inf
+INF  MdeModulePkg/Universal/MonotonicCounterRuntimeDxe/MonotonicCounterRuntimeDxe.inf
+INF  MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleRuntimeDxe.inf
+INF  MdeModulePkg/Universal/Console/ConPlatformDxe/ConPlatformDxe.inf
+INF  MdeModulePkg/Universal/Console/ConSplitterDxe/ConSplitterDxe.inf
+INF  MdeModulePkg/Universal/Console/TerminalDxe/TerminalDxe.inf
+INF  MdeModulePkg/Universal/BdsDxe/BdsDxe.inf
+INF  MdeModulePkg/Application/UiApp/UiApp.inf
+INF  OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.inf
+INF  MdeModulePkg/Universal/DevicePathDxe/DevicePathDxe.inf
+INF  MdeModulePkg/Universal/Disk/DiskIoDxe/DiskIoDxe.inf
+INF  MdeModulePkg/Universal/Disk/PartitionDxe/PartitionDxe.inf
+INF  MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
+INF  OvmfPkg/SataControllerDxe/SataControllerDxe.inf
+INF  MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf
+INF  MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBusDxe.inf
+INF  MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressDxe.inf
+INF  MdeModulePkg/Universal/HiiDatabaseDxe/HiiDatabaseDxe.inf
+INF  MdeModulePkg/Universal/SetupBrowserDxe/SetupBrowserDxe.inf
+INF  MdeModulePkg/Universal/DisplayEngineDxe/DisplayEngineDxe.inf
+
+INF  OvmfPkg/SioBusDxe/SioBusDxe.inf
+INF  MdeModulePkg/Bus/Pci/PciSioSerialDxe/PciSioSerialDxe.inf
+
+INF  MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
+INF  OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
+
+INF  MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableDxe.inf
+INF  OvmfPkg/AcpiPlatformDxe/AcpiPlatformDxe.inf
+
+INF  FatPkg/EnhancedFatDxe/Fat.inf
+INF OvmfPkg/TdxDxe/TdxDxe.inf
+
+INF  OvmfPkg/IoMmuDxe/IoMmuDxe.inf
+
+#
+# Variable driver stack (non-SMM)
+#
+INF  OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
+INF  OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf
+INF  MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf
+INF  MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf
+
+#
+# EFI_CC_MEASUREMENT_PROTOCOL
+#
+INF SecurityPkg/Tcg/TdTcg2Dxe/TdTcg2Dxe.inf
+
+################################################################################
+
+[FV.NCCFV]
+FvForceRebase      = FALSE
+FvNameGuid         = AE047C6D-BCE9-426C-AE03-A68E3B8A0488
+BlockSize          = 0x10000
+FvAlignment        = 16
+ERASE_POLARITY     = 1
+MEMORY_MAPPED      = TRUE
+STICKY_WRITE       = TRUE
+LOCK_CAP           = TRUE
+LOCK_STATUS        = TRUE
+WRITE_DISABLED_CAP = TRUE
+WRITE_ENABLED_CAP  = TRUE
+WRITE_STATUS       = TRUE
+WRITE_LOCK_CAP     = TRUE
+WRITE_LOCK_STATUS  = TRUE
+READ_DISABLED_CAP  = TRUE
+READ_ENABLED_CAP   = TRUE
+READ_STATUS        = TRUE
+READ_LOCK_CAP      = TRUE
+READ_LOCK_STATUS   = TRUE
+
+#
+# DXE Phase modules
+#
+INF  MdeModulePkg/Universal/EbcDxe/EbcDxe.inf
 INF  OvmfPkg/VirtioScsiDxe/VirtioScsi.inf
 INF  OvmfPkg/VirtioRngDxe/VirtioRng.inf
 !if $(PVSCSI_ENABLE) == TRUE
@@ -212,64 +295,28 @@ INF  OvmfPkg/MptScsiDxe/MptScsiDxe.inf
 !if $(LSI_SCSI_ENABLE) == TRUE
 INF  OvmfPkg/LsiScsiDxe/LsiScsiDxe.inf
 !endif
-
-!if $(SECURE_BOOT_ENABLE) == TRUE
-  INF  SecurityPkg/VariableAuthenticated/SecureBootConfigDxe/SecureBootConfigDxe.inf
-!endif
-
-INF  MdeModulePkg/Universal/WatchdogTimerDxe/WatchdogTimer.inf
-INF  MdeModulePkg/Universal/MonotonicCounterRuntimeDxe/MonotonicCounterRuntimeDxe.inf
-INF  MdeModulePkg/Universal/CapsuleRuntimeDxe/CapsuleRuntimeDxe.inf
-INF  MdeModulePkg/Universal/Console/ConPlatformDxe/ConPlatformDxe.inf
-INF  MdeModulePkg/Universal/Console/ConSplitterDxe/ConSplitterDxe.inf
 INF  MdeModulePkg/Universal/Console/GraphicsConsoleDxe/GraphicsConsoleDxe.inf
-INF  MdeModulePkg/Universal/Console/TerminalDxe/TerminalDxe.inf
 INF  MdeModulePkg/Universal/DriverHealthManagerDxe/DriverHealthManagerDxe.inf
-INF  MdeModulePkg/Universal/BdsDxe/BdsDxe.inf
-INF  MdeModulePkg/Application/UiApp/UiApp.inf
-INF  OvmfPkg/QemuKernelLoaderFsDxe/QemuKernelLoaderFsDxe.inf
-INF  MdeModulePkg/Universal/DevicePathDxe/DevicePathDxe.inf
-INF  MdeModulePkg/Universal/Disk/DiskIoDxe/DiskIoDxe.inf
-INF  MdeModulePkg/Universal/Disk/PartitionDxe/PartitionDxe.inf
 INF  MdeModulePkg/Universal/Disk/RamDiskDxe/RamDiskDxe.inf
-INF  MdeModulePkg/Universal/Disk/UnicodeCollation/EnglishDxe/EnglishDxe.inf
 INF  MdeModulePkg/Bus/Scsi/ScsiBusDxe/ScsiBusDxe.inf
 INF  MdeModulePkg/Bus/Scsi/ScsiDiskDxe/ScsiDiskDxe.inf
-INF  OvmfPkg/SataControllerDxe/SataControllerDxe.inf
-INF  MdeModulePkg/Bus/Ata/AtaAtapiPassThru/AtaAtapiPassThru.inf
-INF  MdeModulePkg/Bus/Ata/AtaBusDxe/AtaBusDxe.inf
-INF  MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressDxe.inf
-INF  MdeModulePkg/Universal/HiiDatabaseDxe/HiiDatabaseDxe.inf
-INF  MdeModulePkg/Universal/SetupBrowserDxe/SetupBrowserDxe.inf
-INF  MdeModulePkg/Universal/DisplayEngineDxe/DisplayEngineDxe.inf
 INF  MdeModulePkg/Universal/MemoryTest/NullMemoryTestDxe/NullMemoryTestDxe.inf
-
-INF  OvmfPkg/SioBusDxe/SioBusDxe.inf
-INF  MdeModulePkg/Bus/Pci/PciSioSerialDxe/PciSioSerialDxe.inf
 INF  MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KeyboardDxe.inf
-
-INF  MdeModulePkg/Universal/SmbiosDxe/SmbiosDxe.inf
-INF  OvmfPkg/SmbiosPlatformDxe/SmbiosPlatformDxe.inf
-
-INF  MdeModulePkg/Universal/Acpi/AcpiTableDxe/AcpiTableDxe.inf
-INF  OvmfPkg/AcpiPlatformDxe/AcpiPlatformDxe.inf
 INF  MdeModulePkg/Universal/Acpi/S3SaveStateDxe/S3SaveStateDxe.inf
 INF  MdeModulePkg/Universal/Acpi/BootScriptExecutorDxe/BootScriptExecutorDxe.inf
 INF  MdeModulePkg/Universal/Acpi/BootGraphicsResourceTableDxe/BootGraphicsResourceTableDxe.inf
-
-INF  FatPkg/EnhancedFatDxe/Fat.inf
 INF  MdeModulePkg/Universal/Disk/UdfDxe/UdfDxe.inf
 INF  OvmfPkg/VirtioFsDxe/VirtioFsDxe.inf
 
-!if $(TOOL_CHAIN_TAG) != "XCODE5"
+!if $(BUILD_SHELL) == TRUE && $(TOOL_CHAIN_TAG) != "XCODE5"
 INF  OvmfPkg/LinuxInitrdDynamicShellCommand/LinuxInitrdDynamicShellCommand.inf
 !endif
+!if $(BUILD_SHELL) == TRUE
 INF  ShellPkg/Application/Shell/Shell.inf
+!endif
 
 INF MdeModulePkg/Logo/LogoDxe.inf
 
-INF OvmfPkg/TdxDxe/TdxDxe.inf
-
 #
 # Usb Support
 #
@@ -285,20 +332,6 @@ INF  OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf
 INF  OvmfPkg/QemuRamfbDxe/QemuRamfbDxe.inf
 INF  OvmfPkg/VirtioGpuDxe/VirtioGpu.inf
 INF  OvmfPkg/PlatformDxe/Platform.inf
-INF  OvmfPkg/IoMmuDxe/IoMmuDxe.inf
-
-#
-# Variable driver stack (non-SMM)
-#
-INF  OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
-INF  OvmfPkg/EmuVariableFvbRuntimeDxe/Fvb.inf
-INF  MdeModulePkg/Universal/FaultTolerantWriteDxe/FaultTolerantWriteDxe.inf
-INF  MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf
-
-#
-# EFI_CC_MEASUREMENT_PROTOCOL
-#
-INF SecurityPkg/Tcg/TdTcg2Dxe/TdTcg2Dxe.inf
 
 ################################################################################
 
@@ -329,6 +362,7 @@ FILE FV_IMAGE = 9E21FD93-9C72-4c15-8C4B-E77F1DB2D792 {
      # compression operation in order to achieve better overall compression.
      #
      SECTION FV_IMAGE = DXEFV
+     SECTION FV_IMAGE = NCCFV
    }
  }