u-boot.git/include/efi_loader.h, branch v2022.04-rc2

efi_loader: add handle for UART

2022-02-05T19:20:01+00:00

When loading an EFI binary via the UART we assign a UART device path to it.
But we lack a handle with that device path.

Signed-off-by: Heinrich Schuchardt

efi: Use 16-bit unicode strings

2022-02-03T17:16:01+00:00

At present we use wide characters for unicode but this is not necessary.
Change the code to use the 'u' literal instead. This helps to fix build
warnings for sandbox on rpi.

Signed-off-by: Simon Glass 
Suggested-by: Heinrich Schuchardt 
Reviewed-by: Heinrich Schuchardt

efi_loader: correctly handle mixed hashes and signatures in db

2022-01-29T09:23:40+00:00

A mix of signatures and hashes in db doesn't always work as intended.
Currently if the digest algorithm is not explicitly set to sha256 we
stop walking the security database and reject the image.

That's problematic in case we find and try to check a signature before
inspecting the sha256 hash.  If the image is unsigned we will reject it
even if the digest matches.

Since we no longer reject the image on unknown algorithms add an explicit
check and reject the image if any other hash algorithm apart from sha256
is detected on dbx.

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

efi_loader: Enable RISCV_EFI_BOOT_PROTOCOL support

2022-01-29T09:23:40+00:00

This adds support for new RISCV_EFI_BOOT_PROTOCOL to
communicate the boot hart ID to bootloader/kernel on RISC-V
UEFI platforms.

The specification of the protocol is hosted at:
https://github.com/riscv-non-isa/riscv-uefi

Signed-off-by: Sunil V L 
Reviewed-by: Heinrich Schuchardt

doc: replace @return by Return:

2022-01-19T17:11:34+00:00

Sphinx expects Return: and not @return to indicate a return value.

find . -name '*.c' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

find . -name '*.h' -exec \
sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \;

Signed-off-by: Heinrich Schuchardt

efi_loader: Get rid of kaslr-seed if EFI_RNG_PROTOCOL is installed

2022-01-15T09:57:22+00:00

U-Boot, in some occasions, injects a 'kaslr-seed' property on the /chosen
node. That would be problematic in case we want to measure the DTB we
install in the configuration table, since it would change across reboots.

The Linux kernel EFI-stub completely ignores it and only relies on
EFI_RNG_PROTOCOL for it's own randomness needs (i.e the randomization
of the physical placement of the kernel). In fact it (blindly) overwrites
the existing seed if the protocol is installed. However it still uses it
for randomizing it's virtual placement.
So let's get rid of it in the presence of the RNG protocol.

It's worth noting that TPMs also provide an RNG.  So if we tweak our
EFI_RNG_PROTOCOL slightly and install the protocol when a TPM device
is present the 'kaslr-seed' property will always be removed, allowing
us to reliably measure our DTB.

Acked-by: Ard Biesheuvel 
Signed-off-by: Ilias Apalodimas 
Reviewed-by: Mark Kettenis

efi_loader: efi_tcg2_register returns appropriate error

2021-12-09T19:43:25+00:00

This commit modify efi_tcg2_register() to return the
appropriate error.
With this fix, sandbox will not boot because efi_tcg2_register()
fails due to some missing feature in GetCapabilities.
So disable sandbox if EFI_TCG2_PROTOCOL is enabled.

UEFI secure boot variable measurement is not directly related
to TCG2 protocol installation, tcg2_measure_secure_boot_variable()
is moved to the separate function.

Signed-off-by: Masahisa Kojima 
Reviewed-by: Ilias Apalodimas

efi_loader: Add check for event log passed from firmware

2021-11-30T08:23:49+00:00

Platforms may have support to measure their initial firmware components
and pass the event log to u-boot. The event log address can be passed
in property tpm_event_log_addr and tpm_event_log_size of the tpm node.
Platforms may choose their own specific mechanism to do so. A weak
function is added to check if even log has been passed to u-boot
from earlier firmware components. If available, the eventlog is parsed
to check for its correctness and further event logs are appended to the
passed log.

Signed-off-by: Ruchika Gupta 
Reviewed-by: Ilias Apalodimas 
Tested-by: Ilias Apalodimas

efi_loader: add UEFI GPT measurement

2021-10-26T19:32:46+00:00

This commit adds the UEFI GPT disk partition topology
measurement required in TCG PC Client Platform Firmware
Profile Specification

Signed-off-by: Masahisa Kojima

efi_loader: add SMBIOS table measurement

2021-10-26T15:58:14+00:00

TCG PC Client Platform Firmware Profile Specification
requires to measure the SMBIOS table that contains static
configuration information (e.g. Platform Manufacturer
Enterprise Number assigned by IANA, platform model number,
Vendor and Device IDs for each SMBIOS table).

The device- and environment-dependent information such as
serial number is cleared to zero or space character for
the measurement.

Existing smbios_string() function returns pointer to the string
with const qualifier, but exisintg use case is updating version
string and const qualifier must be removed.
This commit removes const qualifier from smbios_string()
return value and reuses to clear the strings for the measurement.

This commit also fixes the following compiler warning:

lib/smbios-parser.c:59:39: warning: cast to pointer from integer of
different size [-Wint-to-pointer-cast]
  const struct smbios_header *header = (struct smbios_header *)entry->struct_table_address;

Signed-off-by: Masahisa Kojima