u-boot.git/include/efi_variable.h, branch v2020.10-rc3

efi_loader: remove empty comment line

2020-08-24T14:37:53+00:00

Remove a line leading to a warning in make htmldocs.

Signed-off-by: Heinrich Schuchardt

efi_loader: Enable run-time variable support for tee based variables

2020-08-01T09:57:41+00:00

We recently added functions for storing/restoring variables
from a file to a memory backed buffer marked as __efi_runtime_data
commit f1f990a8c958 ("efi_loader: memory buffer for variables")
commit 5f7dcf079de8 ("efi_loader: UEFI variable persistence")

Using the same idea we now can support GetVariable() and GetNextVariable()
on the OP-TEE based variables as well.

So let's re-arrange the code a bit and move the commmon code for
accessing variables out of efi_variable.c. Create common functions for
reading variables from memory that both implementations can use on
run-time. Then just use those functions in the run-time variants of the
OP-TEE based EFI variable implementation and initialize the memory
buffer on ExitBootServices()

Signed-off-by: Ilias Apalodimas 
Reviewed-by: Heinrich Schuchardt

efi_loader: describe EFI_VAR_FILE_MAGIC

2020-07-16T10:37:03+00:00

Add documentation for EFI_VAR_FILE_MAGIC used in the file format for UEFI
variables.

Signed-off-by: Heinrich Schuchardt

efi_loader: pre-seed UEFI variables

2020-07-16T10:37:02+00:00

Include a file with the initial values for non-volatile UEFI variables
into the U-Boot binary. If this variable is set, changes to variable PK
will not be allowed.

Signed-off-by: Heinrich Schuchardt

efi_loader: identify PK, KEK, db, dbx correctly

2020-07-16T10:37:02+00:00

To determine if a varible is on the of the authentication variables
PK, KEK, db, dbx we have to check both the name and the GUID.

Provide a function converting the variable-name/guid pair to an enum and
use it consistently.

Signed-off-by: Heinrich Schuchardt

efi_loader: restructure code for TEE variables

2020-07-16T10:37:02+00:00

When using secure boot functions needed both for file and TEE based UEFI
variables have to be moved to the common code module efi_var_common.c.

Signed-off-by: Heinrich Schuchardt

efi_loader: memory buffer for variables

2020-07-11T21:14:17+00:00

Saving UEFI variable as encoded U-Boot environment variables does not allow
support at runtime.

Provide functions to manage a memory buffer with UEFI variables.

Signed-off-by: Heinrich Schuchardt

efi_loader: UEFI variable persistence

2020-07-11T21:14:17+00:00

Persist non-volatile UEFI variables in a file on the EFI system partition.

The file is written whenever a non-volatile UEFI variable is changed after
initialization of the UEFI sub-system.

The file is read during the UEFI sub-system initialization to restore
non-volatile UEFI variables.

Signed-off-by: Heinrich Schuchardt

efi_loader: separate UEFI variable API from implemementation

2020-07-11T21:14:16+00:00

Separate the remaining UEFI variable API functions GetNextVariableName and
QueryVariableInfo() from internal functions implementing them.

Signed-off-by: Heinrich Schuchardt

efi_loader: prepare for read only OP-TEE variables

2020-07-11T21:14:16+00:00

We currently have two implementations of UEFI variables:

* variables provided via an OP-TEE module
* variables stored in the U-Boot environment

Read only variables are up to now only implemented in the U-Boot
environment implementation.

Provide a common interface for both implementations that allows handling
read-only variables.

As variable access is limited to very few source files put variable
related definitions into new include efi_variable.h instead of efi_loader.

Signed-off-by: Heinrich Schuchardt