OvmfPkg/OvmfPkg.dec

   1 ## @file
   2 #  EFI/Framework Open Virtual Machine Firmware (OVMF) platform
   3 #
   4 #  Copyright (c) 2020, Rebecca Cran <rebecca@bsdio.com>
   5 #  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
   6 #  Copyright (c) 2014, Pluribus Networks, Inc.
   7 #
   8 #  SPDX-License-Identifier: BSD-2-Clause-Patent
   9 #
  10 ##
  11
  12 [Defines]
  13   DEC_SPECIFICATION              = 0x00010005
  14   PACKAGE_NAME                   = OvmfPkg
  15   PACKAGE_GUID                   = 2daf5f34-50e5-4b9d-b8e3-5562334d87e5
  16   PACKAGE_VERSION                = 0.1
  17
  18 [Includes]
  19   Include
  20   Csm/Include
  21
  22 [LibraryClasses]
  23   ##  @libraryclass  Access bhyve's firmware control interface.
  24   BhyveFwCtlLib|Include/Library/BhyveFwCtlLib.h
  25
  26   ##  @libraryclass  Loads and boots a Linux kernel image
  27   #
  28   LoadLinuxLib|Include/Library/LoadLinuxLib.h
  29
  30   ##  @libraryclass  Declares helper functions for Secure Encrypted
  31   #                  Virtualization (SEV) guests.
  32   MemEncryptSevLib|Include/Library/MemEncryptSevLib.h
  33
  34   ##  @libraryclass  Save and restore variables using a file
  35   #
  36   NvVarsFileLib|Include/Library/NvVarsFileLib.h
  37
  38   ##  @libraryclass  Provides services to work with PCI capabilities in PCI
  39   #                  config space.
  40   PciCapLib|Include/Library/PciCapLib.h
  41
  42   ##  @libraryclass  Layered on top of PciCapLib, allows clients to plug an
  43   #                  EFI_PCI_IO_PROTOCOL backend into PciCapLib, for config
  44   #                  space access.
  45   PciCapPciIoLib|Include/Library/PciCapPciIoLib.h
  46
  47   ##  @libraryclass  Layered on top of PciCapLib, allows clients to plug a
  48   #                  PciSegmentLib backend into PciCapLib, for config space
  49   #                  access.
  50   PciCapPciSegmentLib|Include/Library/PciCapPciSegmentLib.h
  51
  52   ##  @libraryclass  Register a status code handler for printing the Boot
  53   #                  Manager's LoadImage() and StartImage() preparations, and
  54   #                  return codes, to the UEFI console.
  55   PlatformBmPrintScLib|Include/Library/PlatformBmPrintScLib.h
  56
  57   ##  @libraryclass  Customize FVB2 protocol member functions for a platform.
  58   PlatformFvbLib|Include/Library/PlatformFvbLib.h
  59
  60   ##  @libraryclass  Access QEMU's firmware configuration interface
  61   #
  62   QemuFwCfgLib|Include/Library/QemuFwCfgLib.h
  63
  64   ##  @libraryclass  S3 support for QEMU fw_cfg
  65   #
  66   QemuFwCfgS3Lib|Include/Library/QemuFwCfgS3Lib.h
  67
  68   ##  @libraryclass  Parse the contents of named fw_cfg files as simple
  69   #                  (scalar) data types.
  70   QemuFwCfgSimpleParserLib|Include/Library/QemuFwCfgSimpleParserLib.h
  71
  72   ##  @libraryclass  Rewrite the BootOrder NvVar based on QEMU's "bootorder"
  73   #                  fw_cfg file.
  74   #
  75   QemuBootOrderLib|Include/Library/QemuBootOrderLib.h
  76
  77   ##  @libraryclass  Load a kernel image and command line passed to QEMU via
  78   #                  the command line
  79   #
  80   QemuLoadImageLib|Include/Library/QemuLoadImageLib.h
  81
  82   ##  @libraryclass  Serialize (and deserialize) variables
  83   #
  84   SerializeVariablesLib|Include/Library/SerializeVariablesLib.h
  85
  86   ##  @libraryclass  Declares utility functions for virtio device drivers.
  87   VirtioLib|Include/Library/VirtioLib.h
  88
  89   ##  @libraryclass  Install Virtio Device Protocol instances on virtio-mmio
  90   #                  transports.
  91   VirtioMmioDeviceLib|Include/Library/VirtioMmioDeviceLib.h
  92
  93   ##  @libraryclass  Invoke Xen hypercalls
  94   #
  95   XenHypercallLib|Include/Library/XenHypercallLib.h
  96
  97   ##  @libraryclass  Manage XenBus device path and I/O handles
  98   #
  99   XenIoMmioLib|Include/Library/XenIoMmioLib.h
 100
 101   ##  @libraryclass  Get information about Xen
 102   #
 103   XenPlatformLib|Include/Library/XenPlatformLib.h
 104
 105 [Guids]
 106   gUefiOvmfPkgTokenSpaceGuid            = {0x93bb96af, 0xb9f2, 0x4eb8, {0x94, 0x62, 0xe0, 0xba, 0x74, 0x56, 0x42, 0x36}}
 107   gEfiXenInfoGuid                       = {0xd3b46f3b, 0xd441, 0x1244, {0x9a, 0x12, 0x0, 0x12, 0x27, 0x3f, 0xc1, 0x4d}}
 108   gOvmfPkKek1AppPrefixGuid              = {0x4e32566d, 0x8e9e, 0x4f52, {0x81, 0xd3, 0x5b, 0xb9, 0x71, 0x5f, 0x97, 0x27}}
 109   gOvmfPlatformConfigGuid               = {0x7235c51c, 0x0c80, 0x4cab, {0x87, 0xac, 0x3b, 0x08, 0x4a, 0x63, 0x04, 0xb1}}
 110   gVirtioMmioTransportGuid              = {0x837dca9e, 0xe874, 0x4d82, {0xb2, 0x9a, 0x23, 0xfe, 0x0e, 0x23, 0xd1, 0xe2}}
 111   gQemuRamfbGuid                        = {0x557423a1, 0x63ab, 0x406c, {0xbe, 0x7e, 0x91, 0xcd, 0xbc, 0x08, 0xc4, 0x57}}
 112   gXenBusRootDeviceGuid                 = {0xa732241f, 0x383d, 0x4d9c, {0x8a, 0xe1, 0x8e, 0x09, 0x83, 0x75, 0x89, 0xd7}}
 113   gRootBridgesConnectedEventGroupGuid   = {0x24a2d66f, 0xeedd, 0x4086, {0x90, 0x42, 0xf2, 0x6e, 0x47, 0x97, 0xee, 0x69}}
 114   gMicrosoftVendorGuid                  = {0x77fa9abd, 0x0359, 0x4d32, {0xbd, 0x60, 0x28, 0xf4, 0xe7, 0x8f, 0x78, 0x4b}}
 115   gEfiLegacyBiosGuid                    = {0x2E3044AC, 0x879F, 0x490F, {0x97, 0x60, 0xBB, 0xDF, 0xAF, 0x69, 0x5F, 0x50}}
 116   gEfiLegacyDevOrderVariableGuid        = {0xa56074db, 0x65fe, 0x45f7, {0xbd, 0x21, 0x2d, 0x2b, 0xdd, 0x8e, 0x96, 0x52}}
 117   gLinuxEfiInitrdMediaGuid              = {0x5568e427, 0x68fc, 0x4f3d, {0xac, 0x74, 0xca, 0x55, 0x52, 0x31, 0xcc, 0x68}}
 118   gQemuKernelLoaderFsMediaGuid          = {0x1428f772, 0xb64a, 0x441e, {0xb8, 0xc3, 0x9e, 0xbd, 0xd7, 0xf8, 0x93, 0xc7}}
 119
 120 [Ppis]
 121   # PPI whose presence in the PPI database signals that the TPM base address
 122   # has been discovered and recorded
 123   gOvmfTpmDiscoveredPpiGuid             = {0xb9a61ad0, 0x2802, 0x41f3, {0xb5, 0x13, 0x96, 0x51, 0xce, 0x6b, 0xd5, 0x75}}
 124
 125 [Protocols]
 126   gVirtioDeviceProtocolGuid             = {0xfa920010, 0x6785, 0x4941, {0xb6, 0xec, 0x49, 0x8c, 0x57, 0x9f, 0x16, 0x0a}}
 127   gXenBusProtocolGuid                   = {0x3d3ca290, 0xb9a5, 0x11e3, {0xb7, 0x5d, 0xb8, 0xac, 0x6f, 0x7d, 0x65, 0xe6}}
 128   gXenIoProtocolGuid                    = {0x6efac84f, 0x0ab0, 0x4747, {0x81, 0xbe, 0x85, 0x55, 0x62, 0x59, 0x04, 0x49}}
 129   gIoMmuAbsentProtocolGuid              = {0xf8775d50, 0x8abd, 0x4adf, {0x92, 0xac, 0x85, 0x3e, 0x51, 0xf6, 0xc8, 0xdc}}
 130   gEfiLegacy8259ProtocolGuid            = {0x38321dba, 0x4fe0, 0x4e17, {0x8a, 0xec, 0x41, 0x30, 0x55, 0xea, 0xed, 0xc1}}
 131   gEfiFirmwareVolumeProtocolGuid        = {0x389F751F, 0x1838, 0x4388, {0x83, 0x90, 0xcd, 0x81, 0x54, 0xbd, 0x27, 0xf8}}
 132   gEfiIsaAcpiProtocolGuid               = {0x64a892dc, 0x5561, 0x4536, {0x92, 0xc7, 0x79, 0x9b, 0xfc, 0x18, 0x33, 0x55}}
 133   gEfiIsaIoProtocolGuid                 = {0x7ee2bd44, 0x3da0, 0x11d4, {0x9a, 0x38, 0x0, 0x90, 0x27, 0x3f, 0xc1, 0x4d}}
 134   gEfiLegacyBiosProtocolGuid            = {0xdb9a1e3d, 0x45cb, 0x4abb, {0x85, 0x3b, 0xe5, 0x38, 0x7f, 0xdb, 0x2e, 0x2d}}
 135   gEfiLegacyBiosPlatformProtocolGuid    = {0x783658a3, 0x4172, 0x4421, {0xa2, 0x99, 0xe0, 0x09, 0x07, 0x9c, 0x0c, 0xb4}}
 136   gEfiLegacyInterruptProtocolGuid       = {0x31ce593d, 0x108a, 0x485d, {0xad, 0xb2, 0x78, 0xf2, 0x1f, 0x29, 0x66, 0xbe}}
 137   gEfiVgaMiniPortProtocolGuid           = {0xc7735a2f, 0x88f5, 0x4882, {0xae, 0x63, 0xfa, 0xac, 0x8c, 0x8b, 0x86, 0xb3}}
 138   gOvmfLoadedX86LinuxKernelProtocolGuid = {0xa3edc05d, 0xb618, 0x4ff6, {0x95, 0x52, 0x76, 0xd7, 0x88, 0x63, 0x43, 0xc8}}
 139
 140 [PcdsFixedAtBuild]
 141   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfPeiMemFvBase|0x0|UINT32|0
 142   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfPeiMemFvSize|0x0|UINT32|1
 143   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvBase|0x0|UINT32|0x15
 144   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDxeMemFvSize|0x0|UINT32|0x16
 145
 146   ## This flag is used to control the destination port for PlatformDebugLibIoPort
 147   gUefiOvmfPkgTokenSpaceGuid.PcdDebugIoPort|0x402|UINT16|4
 148
 149   ## When VirtioScsiDxe is instantiated for a HBA, the numbers of targets and
 150   #  LUNs are retrieved from the host during virtio-scsi setup.
 151   #  MdeModulePkg/Bus/Scsi/ScsiBusDxe then scans all MaxTarget * MaxLun
 152   #  possible devices. This can take extremely long, for example with
 153   #  MaxTarget=255 and MaxLun=16383. The *inclusive* constants below limit
 154   #  MaxTarget and MaxLun, independently, should the host report higher values,
 155   #  so that scanning the number of devices given by their product is still
 156   #  acceptably fast.
 157   gUefiOvmfPkgTokenSpaceGuid.PcdVirtioScsiMaxTargetLimit|31|UINT16|6
 158   gUefiOvmfPkgTokenSpaceGuid.PcdVirtioScsiMaxLunLimit|7|UINT32|7
 159
 160   ## Sets the *inclusive* number of targets and LUNs that PvScsi exposes for
 161   #  scan by ScsiBusDxe.
 162   #  As specified above for VirtioScsi, ScsiBusDxe scans all MaxTarget * MaxLun
 163   #  possible devices, which can take extremely long. Thus, the below constants
 164   #  are used so that scanning the number of devices given by their product
 165   #  is still acceptably fast.
 166   gUefiOvmfPkgTokenSpaceGuid.PcdPvScsiMaxTargetLimit|64|UINT8|0x36
 167   gUefiOvmfPkgTokenSpaceGuid.PcdPvScsiMaxLunLimit|0|UINT8|0x37
 168
 169   ## After PvScsiDxe sends a SCSI request to the device, it waits for
 170   #  the request completion in a polling loop.
 171   #  This constant defines how many micro-seconds to wait between each
 172   #  polling loop iteration.
 173   gUefiOvmfPkgTokenSpaceGuid.PcdPvScsiWaitForCmpStallInUsecs|5|UINT32|0x38
 174
 175   ## Set the *inclusive* number of targets that MptScsi exposes for scan
 176   #  by ScsiBusDxe.
 177   gUefiOvmfPkgTokenSpaceGuid.PcdMptScsiMaxTargetLimit|7|UINT8|0x39
 178
 179   ## Microseconds to stall between polling for MptScsi request result
 180   gUefiOvmfPkgTokenSpaceGuid.PcdMptScsiStallPerPollUsec|5|UINT32|0x3a
 181
 182   ## Set the *inclusive* number of targets and LUNs that LsiScsi exposes for
 183   #  scan by ScsiBusDxe.
 184   gUefiOvmfPkgTokenSpaceGuid.PcdLsiScsiMaxTargetLimit|7|UINT8|0x3b
 185   gUefiOvmfPkgTokenSpaceGuid.PcdLsiScsiMaxLunLimit|0|UINT8|0x3c
 186
 187   ## Microseconds to stall between polling for LsiScsi request result
 188   gUefiOvmfPkgTokenSpaceGuid.PcdLsiScsiStallPerPollUsec|5|UINT32|0x3d
 189
 190   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashNvStorageEventLogBase|0x0|UINT32|0x8
 191   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashNvStorageEventLogSize|0x0|UINT32|0x9
 192   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFirmwareFdSize|0x0|UINT32|0xa
 193   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFirmwareBlockSize|0|UINT32|0xb
 194   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashNvStorageVariableBase|0x0|UINT32|0xc
 195   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashNvStorageFtwSpareBase|0x0|UINT32|0xd
 196   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashNvStorageFtwWorkingBase|0x0|UINT32|0xe
 197   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFdBaseAddress|0x0|UINT32|0xf
 198   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPageTablesBase|0x0|UINT32|0x11
 199   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPageTablesSize|0x0|UINT32|0x12
 200   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamBase|0x0|UINT32|0x13
 201   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSecPeiTempRamSize|0x0|UINT32|0x14
 202   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfLockBoxStorageBase|0x0|UINT32|0x18
 203   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfLockBoxStorageSize|0x0|UINT32|0x19
 204   gUefiOvmfPkgTokenSpaceGuid.PcdGuidedExtractHandlerTableSize|0x0|UINT32|0x1a
 205   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfDecompressionScratchEnd|0x0|UINT32|0x1f
 206
 207   ## Pcd8259LegacyModeMask defines the default mask value for platform. This
 208   #  value is determined.
 209   #  1) If platform only support pure UEFI, value should be set to 0xFFFF or
 210   #     0xFFFE; Because only clock interrupt is allowed in legacy mode in pure
 211   #     UEFI platform.
 212   #  2) If platform install CSM and use thunk module:
 213   #     a) If thunk call provided by CSM binary requires some legacy interrupt
 214   #        support, the corresponding bit should be opened as 0.
 215   #        For example, if keyboard interfaces provided CSM binary use legacy
 216   #        keyboard interrupt in 8259 bit 1, then the value should be set to
 217   #        0xFFFC.
 218   #     b) If all thunk call provied by CSM binary do not require legacy
 219   #        interrupt support, value should be set to 0xFFFF or 0xFFFE.
 220   #
 221   #  The default value of legacy mode mask could be changed by
 222   #  EFI_LEGACY_8259_PROTOCOL->SetMask(). But it is rarely need change it
 223   #  except some special cases such as when initializing the CSM binary, it
 224   #  should be set to 0xFFFF to mask all legacy interrupt. Please restore the
 225   #  original legacy mask value if changing is made for these special case.
 226   gUefiOvmfPkgTokenSpaceGuid.Pcd8259LegacyModeMask|0xFFFF|UINT16|0x3
 227
 228   ## Pcd8259LegacyModeEdgeLevel defines the default edge level for legacy
 229   #  mode's interrrupt controller.
 230   #  For the corresponding bits, 0 = Edge triggered and 1 = Level triggered.
 231   gUefiOvmfPkgTokenSpaceGuid.Pcd8259LegacyModeEdgeLevel|0x0000|UINT16|0x5
 232
 233   ## Indicates if BiosVideo driver will switch to 80x25 Text VGA Mode when
 234   #  exiting boot service.
 235   #   TRUE  - Switch to Text VGA Mode.
 236   #   FALSE - Does not switch to Text VGA Mode.
 237   gUefiOvmfPkgTokenSpaceGuid.PcdBiosVideoSetTextVgaModeEnable|FALSE|BOOLEAN|0x28
 238
 239   ## Indicates if BiosVideo driver will check for VESA BIOS Extension service
 240   #  support.
 241   #   TRUE  - Check for VESA BIOS Extension service.
 242   #   FALSE - Does not check for VESA BIOS Extension service.
 243   gUefiOvmfPkgTokenSpaceGuid.PcdBiosVideoCheckVbeEnable|TRUE|BOOLEAN|0x29
 244
 245   ## Indicates if BiosVideo driver will check for VGA service support.
 246   #  NOTE: If both PcdBiosVideoCheckVbeEnable and PcdBiosVideoCheckVgaEnable
 247   #  are set to FALSE, that means Graphics Output protocol will not be
 248   #  installed, the VGA miniport protocol will be installed instead.
 249   #   TRUE  - Check for VGA service.<BR>
 250   #   FALSE - Does not check for VGA service.<BR>
 251   gUefiOvmfPkgTokenSpaceGuid.PcdBiosVideoCheckVgaEnable|TRUE|BOOLEAN|0x2a
 252
 253   ## Indicates if memory space for legacy region will be set as cacheable.
 254   #   TRUE  - Set cachebility for legacy region.
 255   #   FALSE - Does not set cachebility for legacy region.
 256   gUefiOvmfPkgTokenSpaceGuid.PcdLegacyBiosCacheLegacyRegion|TRUE|BOOLEAN|0x2b
 257
 258   ## Specify memory size with bytes to reserve EBDA below 640K for OPROM.
 259   #  The value should be a multiple of 4KB.
 260   gUefiOvmfPkgTokenSpaceGuid.PcdEbdaReservedMemorySize|0x8000|UINT32|0x2c
 261
 262   ## Specify memory base address for OPROM to find free memory.
 263   #  Some OPROMs do not use EBDA or PMM to allocate memory for its usage,
 264   #  instead they find the memory filled with zero from 0x20000.
 265   #  The value should be a multiple of 4KB.
 266   #  The range should be below the EBDA reserved range from
 267   #  (CONVENTIONAL_MEMORY_TOP - Reserved EBDA Memory Size) to
 268   #  CONVENTIONAL_MEMORY_TOP.
 269   gUefiOvmfPkgTokenSpaceGuid.PcdOpromReservedMemoryBase|0x60000|UINT32|0x2d
 270
 271   ## Specify memory size with bytes for OPROM to find free memory.
 272   #  The value should be a multiple of 4KB. And the range should be below the
 273   #  EBDA reserved range from
 274   #  (CONVENTIONAL_MEMORY_TOP - Reserved EBDA Memory Size) to
 275   #  CONVENTIONAL_MEMORY_TOP.
 276   gUefiOvmfPkgTokenSpaceGuid.PcdOpromReservedMemorySize|0x28000|UINT32|0x2e
 277
 278   ## Specify the end of address below 1MB for the OPROM.
 279   #  The last shadowed OpROM should not exceed this address.
 280   gUefiOvmfPkgTokenSpaceGuid.PcdEndOpromShadowAddress|0xdffff|UINT32|0x2f
 281
 282   ## Specify the low PMM (Post Memory Manager) size with bytes below 1MB.
 283   #  The value should be a multiple of 4KB.
 284   # @Prompt Low PMM (Post Memory Manager) Size
 285   gUefiOvmfPkgTokenSpaceGuid.PcdLowPmmMemorySize|0x10000|UINT32|0x30
 286
 287   ## Specify the high PMM (Post Memory Manager) size with bytes above 1MB.
 288   #  The value should be a multiple of 4KB.
 289   gUefiOvmfPkgTokenSpaceGuid.PcdHighPmmMemorySize|0x400000|UINT32|0x31
 290
 291   gUefiOvmfPkgTokenSpaceGuid.PcdXenPvhStartOfDayStructPtr|0x0|UINT32|0x17
 292   gUefiOvmfPkgTokenSpaceGuid.PcdXenPvhStartOfDayStructPtrSize|0x0|UINT32|0x32
 293
 294   ## Number of page frames to use for storing grant table entries.
 295   gUefiOvmfPkgTokenSpaceGuid.PcdXenGrantFrames|4|UINT32|0x33
 296
 297 [PcdsDynamic, PcdsDynamicEx]
 298   gUefiOvmfPkgTokenSpaceGuid.PcdEmuVariableEvent|0|UINT64|2
 299   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFlashVariablesEnable|FALSE|BOOLEAN|0x10
 300   gUefiOvmfPkgTokenSpaceGuid.PcdOvmfHostBridgePciDevId|0|UINT16|0x1b
 301   gUefiOvmfPkgTokenSpaceGuid.PcdQemuSmbiosValidated|FALSE|BOOLEAN|0x21
 302
 303   ## The IO port aperture shared by all PCI root bridges.
 304   #
 305   gUefiOvmfPkgTokenSpaceGuid.PcdPciIoBase|0x0|UINT64|0x22
 306   gUefiOvmfPkgTokenSpaceGuid.PcdPciIoSize|0x0|UINT64|0x23
 307
 308   ## The 32-bit MMIO aperture shared by all PCI root bridges.
 309   #
 310   gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Base|0x0|UINT64|0x24
 311   gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio32Size|0x0|UINT64|0x25
 312
 313   ## The 64-bit MMIO aperture shared by all PCI root bridges.
 314   #
 315   gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Base|0x0|UINT64|0x26
 316   gUefiOvmfPkgTokenSpaceGuid.PcdPciMmio64Size|0x0|UINT64|0x27
 317
 318   ## The following setting controls how many megabytes we configure as TSEG on
 319   #  Q35, for SMRAM purposes. Permitted defaults are: 1, 2, 8. Other defaults
 320   #  cause undefined behavior. During boot, the PCD is updated by PlatformPei
 321   #  to reflect the extended TSEG size, if one is advertized by QEMU.
 322   #
 323   #  This PCD is only accessed if PcdSmmSmramRequire is TRUE (see below).
 324   gUefiOvmfPkgTokenSpaceGuid.PcdQ35TsegMbytes|8|UINT16|0x20
 325
 326   ## Set to TRUE by PlatformPei if the Q35 board supports the "SMRAM at default
 327   #  SMBASE" feature.
 328   #
 329   #  This PCD is only accessed if PcdSmmSmramRequire is TRUE (see below).
 330   gUefiOvmfPkgTokenSpaceGuid.PcdQ35SmramAtDefaultSmbase|FALSE|BOOLEAN|0x34
 331
 332 [PcdsFeatureFlag]
 333   gUefiOvmfPkgTokenSpaceGuid.PcdQemuBootOrderPciTranslation|TRUE|BOOLEAN|0x1c
 334   gUefiOvmfPkgTokenSpaceGuid.PcdQemuBootOrderMmioTranslation|FALSE|BOOLEAN|0x1d
 335
 336   ## This feature flag enables SMM/SMRAM support. Note that it also requires
 337   #  such support from the underlying QEMU instance; if that support is not
 338   #  present, the firmware will reject continuing after a certain point.
 339   #
 340   #  The flag also acts as a general "security switch"; when TRUE, many
 341   #  components will change behavior, with the goal of preventing a malicious
 342   #  runtime OS from tampering with firmware structures (special memory ranges
 343   #  used by OVMF, the varstore pflash chip, LockBox etc).
 344   gUefiOvmfPkgTokenSpaceGuid.PcdSmmSmramRequire|FALSE|BOOLEAN|0x1e
 345
 346   ## Informs modules (including pre-DXE-phase modules) whether the platform
 347   #  firmware contains a CSM (Compatibility Support Module).
 348   #
 349   gUefiOvmfPkgTokenSpaceGuid.PcdCsmEnable|FALSE|BOOLEAN|0x35