From: Ilias Apalodimas <[email protected]> Instead of running StMM in SPM, OP-TEE creates a new secure partition, which emulates SPM and isolates StMM from the rest of the Trusted Applications (TAs). We can then compile StMM as an FD image and run it in OP-TEE. With the addition of a new RPMB driver, we can leverage OP-TEE and store variables to an RPMB device.
Since EDK2 upper layers expect byte addressable code, for the RPMB to work, we need to allocate memory and sync it with the hardware on read/writes. Since DynamicPCDs are not supported in that context we can only use PatchablePCDs. So let's switch them to Pcd instead of FixedPcd and accomodate the new driver. While at it, move the rest of the variables under Pcd section, instead of FixedPcd -- this is in line with how the variables are defined in the other Variable modules. Signed-off-by: Ilias Apalodimas <[email protected]> Reviewed-by: Sami Mujawar <[email protected]> Reviewed-by: Liming Gao <[email protected]> --- Changes since V4: * Define all variable Pcd's under the [Pcd] section instead of [FixedPcd], as suggested by Liming Gao MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.inf | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.inf b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.inf index fada0bf3c5..d8c4f77e7f 100644 --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.inf +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableStandaloneMm.inf @@ -119,10 +119,10 @@ ## SOMETIMES_PRODUCES ## Variable:L"VarErrorFlag" gEdkiiVarErrorFlagGuid -[FixedPcd] - gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize ## CONSUMES +[Pcd] gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase ## SOMETIMES_CONSUMES gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableBase64 ## CONSUMES + gEfiMdeModulePkgTokenSpaceGuid.PcdFlashNvStorageVariableSize ## CONSUMES gEfiMdeModulePkgTokenSpaceGuid.PcdMaxVariableSize ## CONSUMES gEfiMdeModulePkgTokenSpaceGuid.PcdMaxAuthVariableSize ## CONSUMES gEfiMdeModulePkgTokenSpaceGuid.PcdMaxVolatileVariableSize ## CONSUMES -- 2.17.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#71826): https://edk2.groups.io/g/devel/message/71826 Mute This Topic: https://groups.io/mt/80750058/21656 Group Owner: [email protected] Unsubscribe: https://edk2.groups.io/g/devel/unsub [[email protected]] -=-=-=-=-=-=-=-=-=-=-=-
