diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec index 843e963ad3..45874e9c82 100644 --- a/MdeModulePkg/MdeModulePkg.dec +++ b/MdeModulePkg/MdeModulePkg.dec @@ -1220,6 +1220,15 @@ # @Prompt Shadow Peim and PeiCore on boot gEfiMdeModulePkgTokenSpaceGuid.PcdShadowPeimOnBoot|TRUE|BOOLEAN|0x30001029 + ## Enable the feature that evacuate temporary memory to permanent memory or not

+ # Set FALSE as default, if the developer need this feature to avoid this vulnerability, please + # enable it to shadow all PEIMs no matter the behavior controled by PcdShadowPeimOnBoot or + # PcdShadowPeimOnS3Boot
+ # TRUE - Evacuate temporary memory, the actions include copy memory, convert PPI pointers and so on.
+ # FALSE - Do nothing, for example, no copy memory, no convert PPI pointers and so on.
+ # @Prompt Evacuate temporary memory to permanent memory + gEfiMdeModulePkgTokenSpaceGuid.PcdMigrateTemporaryRamFirmwareVolumes|FALSE|BOOLEAN|0x3000102A + ## The mask is used to control memory profile behavior.

# BIT0 - Enable UEFI memory profile.
# BIT1 - Enable SMRAM profile.
diff --git a/MdeModulePkg/MdeModulePkg.uni b/MdeModulePkg/MdeModulePkg.uni index 2007e0596c..5235dee561 100644 --- a/MdeModulePkg/MdeModulePkg.uni +++ b/MdeModulePkg/MdeModulePkg.uni @@ -214,6 +214,12 @@ "TRUE - Shadow PEIM on S3 boot path after memory is ready.
\n" "FALSE - Not shadow PEIM on S3 boot path after memory is ready.
" +#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdMigrateTemporaryRamFirmwareVolumes_HELP #language en-US "Enable the feature that evacuate temporary memory to permanent memory or not.

\n" + "It will allocate page to save the temporary PEIMs resided in NEM(or CAR) to the permanent memory and change all pointers pointed to the NEM(or CAR) to permanent memory.

\n" + "After then, there are no pointer pointed to NEM(or CAR) and TOCTOU volnerability can be avoid.

\n" + +#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdMigrateTemporaryRamFirmwareVolumes_PROMPT #language en-US "Enable the feature that evacuate temporary memory to permanent memory or not" + #string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdAcpiDefaultOemId_PROMPT #language en-US "Default OEM ID for ACPI table creation" #string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdAcpiDefaultOemId_HELP #language en-US "Default OEM ID for ACPI table creation, its length must be 0x6 bytes to follow ACPI specification."