u-boot.git/lib/efi_loader/Kconfig, branch v2020.07

efi_loader: Implement EFI variable handling via OP-TEE

2020-05-17T19:59:53+00:00

In OP-TEE we can run EDK2's StandAloneMM on a secure partition.
StandAloneMM is responsible for the UEFI variable support. In
combination with OP-TEE and it's U-Boot supplicant, variables are
authenticated/validated in secure world and stored on an RPMB partition.

So let's add a new config option in U-Boot implementing the necessary
calls to OP-TEE for the variable management.

Signed-off-by: Ilias Apalodimas 
Signed-off-by: Pipat Methavanitpong 
Signed-off-by: Sughosh Ganu 
Reviewed-by: Heinrich Schuchardt

efi_loader: add CONFIG_EFI_SECURE_BOOT config option

2020-04-16T06:12:46+00:00

Under this configuration, UEFI secure boot support will be added
in later patches.

Signed-off-by: AKASHI Takahiro

efi_loader: enable RNG if DM_RNG is enabled

2020-04-16T06:10:01+00:00

Enable EFI_RNG_PROTOCOL by default if DM_RNG is set.

Signed-off-by: Peter Robinson 
Acked-by: Sughosh Ganu 
Remove superfluous 'if DM_RNG'
Reviewed-by: Heinrich Schuchardt

efi_loader: Implement FileLoad2 for initramfs loading

2020-02-28T18:37:14+00:00

Following kernel's proposal for an arch-agnostic initrd loading
mechanism [1] let's implement the U-boot counterpart.
This new approach has a number of advantages compared to what we did up
to now. The file is loaded into memory only when requested limiting the
area of TOCTOU attacks. Users will be allowed to place the initramfs
file on any u-boot accessible partition instead of just the ESP one.
Finally this is an attempt of a generic interface across architectures
in the linux kernel so it makes sense to support that.

The file location is intentionally only supported as a config option
argument(CONFIG_EFI_INITRD_FILESPEC), in an effort to enhance security.
Although U-boot is not responsible for verifying the integrity of the
initramfs, we can enhance the offered security by only accepting a
built-in option, which will be naturally verified by UEFI Secure Boot.
This can easily change in the future if needed and configure that via ENV
or UEFI variable.

[1] https://lore.kernel.org/linux-efi/20200207202637.GA3464906@rani.riverdale.lan/T/#m4a25eb33112fab7a22faa0fd65d4d663209af32f

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

efi_loader: EFI_RNG_PROTOCOL

2020-02-19T11:53:36+00:00

Do not use quotation marks for Kconfig help text.
Replace rng abbreviation by full words.

Signed-off-by: Heinrich Schuchardt

efi_loader: imply VIDEO_ANSI

2020-01-14T23:51:51+00:00

UEFI programs like GRUB make change terminal colors which requires support
for ANSI escape sequences.

Let CONFIG_EFI_LOADER=y imply CONFIG_VIDEO_ANSI.

Signed-off-by: Heinrich Schuchardt

efi: qemu: arm64: Add efi_rng_protocol implementation for the platform

2020-01-07T17:08:22+00:00

Add support for the EFI_RNG_PROTOCOL routines for the qemu arm64
platform. EFI_RNG_PROTOCOL is an uefi boottime service which is
invoked by the efi stub in the kernel for getting random seed for
kaslr.

The routines are platform specific, and use the virtio-rng device on
the platform to get random data.

The feature can be enabled through the following config
CONFIG_EFI_RNG_PROTOCOL

Signed-off-by: Sughosh Ganu 
Changed SPDX header to use /* instead of //.
Reviewed-by: Heinrich Schuchardt

efi_loader: imply USB_KEYBOARD_FN_KEYS

2020-01-07T17:08:20+00:00

UEFI applications like GRUB and SCT assume that function keys are enabled
on the keyboard.

Let EFI_LOADER imply USB_KEYBOARD_FN_KEYS.

Signed-off-by: Heinrich Schuchardt

efi_loader: default EFI_LOADER=n on ARM11

2019-11-23T08:19:31+00:00

Some of the ARM11 boards have tight limits on the size of U-Boots. Hence
use EFI_LOADER=n as default on ARM11.

Set EFI_LOADER=y for the Raspberry Pi and Raspberry Pi Zero as these boards
have sufficient storage on the SD card.

Suggested-by: Tom Rini 
Signed-off-by: Heinrich Schuchardt

efi_loader: enable EFI_LOADER on arm1136 and arm1176

2019-11-19T11:10:22+00:00

With an implementation for allow_unaligned() available for arm1136 and
arm1176 UEFI can be supported on these architectures.

Signed-off-by: Heinrich Schuchardt