u-boot.git/lib/efi_loader, branch v2020.10-rc1

efi_loader: use logging for block device messages

2020-07-22T10:32:42+00:00

Use logging instead of printf() for messages occurring when scanning block
devices during the initialization of the UEFI sub-system.

Signed-off-by: Heinrich Schuchardt

efi_loader: document efi_save_gd(), efi_restore_gd()

2020-07-22T10:32:42+00:00

Provide function descriptions for efi_save_gd() and efi_restore_gd().

Signed-off-by: Heinrich Schuchardt

efi_loader: loosen buffer parameter check in efi_file_read

2020-07-22T10:32:41+00:00

When reading a directory, EFI_BUFFER_TOO_SMALL should be returned when
the supplied buffer is too small, so a use-case is to call
efi_file_read with *buffer_size=0 and buffer=NULL to obtain the needed
size before doing the actual read.

So move the buffer!=NULL check to after the buffer size has been checked.

This fix allows the Redhat shim fallback to run and e.g. Fedora 32 now
boots out of the box.

Signed-off-by: Stefan Sørensen 
Reviewed-by: Heinrich Schuchardt

efi_loader: Check for the native OP-TEE result on mm_communicate calls

2020-07-22T10:32:41+00:00

Currently we only check for the return value of tee_invoke_func().
Although OP-TEE and StMM will correctly set param[1].u.value.a and we'll
eventually return an error, the correct thing to do is check for the
OP_TEE return code as well.
So let's check for that and move tee_shm_free() and tee_close_session()
before exiting with an error to make sure we always clear the registered
memory.

Fixes: f042e47e8fb43 ("efi_loader: Implement EFI variable handling via OP-TEE")
Signed-off-by: Ilias Apalodimas 
Use EFI_DEVICE_ERROR for TEE communication problems.
Reviewed-by: Heinrich Schuchardt

efi_loader: Rename and correct values for ARM_SMC_MM_*

2020-07-22T10:32:41+00:00

Instead of adding the definition for the specific MM SVC used in
StandAloneMM we added the one used in the standard SMC calls.
So change the value from -4 to -5 to match the correct one defined in
EDK2 and rename them to avoid future confusion

Fixes 23a397d2e2fb: ("efi_loader: Add headers for EDK2 StandAloneMM communication")
Signed-off-by: Ilias Apalodimas 
Reviewed-by: Heinrich Schuchardt

efi_loader: don't use memmove() in efi_var_mem_del()

2020-07-22T10:32:41+00:00

efi_var_mem_del() is in __efi_runtime because it would be needed for a
runtime implementation of SetVariable(). memmove() is not in __efi_runtime.
So we should not use it in efi_var_mem_del().

Signed-off-by: Heinrich Schuchardt

efi_loader: efi_current_var after SetVirtualAddressMap

2020-07-22T10:32:41+00:00

Variable efi_current_var is a pointer to a physical memory address that
becomes invalid after SetVirtualAddressMap(). Instead of converting it via
ConvertPointer() simply set it to NULL.

Fixes: b02a707152dc ("efi_loader: enable UEFI variables at runtime")
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: configuration of variables store

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

The file based and the OP-TEE based UEFI variable store are mutually
exclusive. Define them as choice options in Kconfig.

Signed-off-by: Heinrich Schuchardt