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# SPDX-License-Identifier: GPL-2.0-only
config INTEL_CBNT_SUPPORT
bool "Intel CBnT support"
default n
depends on CPU_INTEL_FIRMWARE_INTERFACE_TABLE
#depends on PLATFORM_HAS_DRAM_CLEAR
select INTEL_TXT
# With CBnT the bootblock is set up as a CBnT IBB and needs a fixed size
select FIXED_BOOTBLOCK_SIZE
help
Enables Intel Converged Bootguard and Trusted Execution Technology
Support. This will enable one to add a Key Manifest (KM) and a Boot
Policy Manifest (BPM) to the filesystem. It will also wrap a FIT around
the firmware and update appropriate entries.
if INTEL_CBNT_SUPPORT
config INTEL_CBNT_GENERATE_KM
bool "Generate Key Manifest (KM)"
default y
select INTEL_CBNT_NEED_KM_PUB_KEY
select INTEL_CBNT_NEED_KM_PRIV_KEY
select INTEL_CBNT_NEED_BPM_PUB_KEY if !INTEL_CBNT_BG_PROV_KM_USE_CFG_FILE
help
Select y to generate the Key Manifest (KM).
Select n to include a KM binary.
config INTEL_CBNT_BG_PROV_KM_USE_CFG_FILE
bool "KM: use a CBnT json config file"
depends on INTEL_CBNT_GENERATE_KM
default y
help
Select y to generate KM from a json config file.
Select n to generate KM from Kconfig options
config INTEL_CBNT_BG_PROV_CFG_FILE
string "CBnT json config file"
depends on INTEL_CBNT_BG_PROV_KM_USE_CFG_FILE
help
Location of the bg-prov json config file.
Either get a sample JSON config file:
$ bg-prov template
Or extract it from a working configuration:
$ bg-prov read-config
config INTEL_CBNT_NEED_KM_PUB_KEY
bool
config INTEL_CBNT_NEED_KM_PRIV_KEY
bool
config INTEL_CBNT_KM_PUB_KEY_FILE
string "Key manifest (KM) public key"
depends on INTEL_CBNT_NEED_KM_PUB_KEY && !INTEL_CBNT_NEED_KM_PRIV_KEY
help
Location of the key manifest (KM) public key file in .pem format.
config INTEL_CBNT_KM_PRIV_KEY_FILE
string "Key manifest (KM) private key"
depends on INTEL_CBNT_NEED_KM_PRIV_KEY
help
Location of the key manifest (KM) private key file in .pem format.
config INTEL_CBNT_NEED_BPM_PUB_KEY
bool
config INTEL_CBNT_NEED_BPM_PRIV_KEY
bool
config INTEL_CBNT_BPM_PUB_KEY_FILE
string "Boot policy manifest (BPM) public key"
depends on INTEL_CBNT_NEED_BPM_PUB_KEY && !INTEL_CBNT_NEED_BPM_PRIV_KEY
help
Location of the boot policy manifest (BPM) public key file in .pem format.
config INTEL_CBNT_BPM_PRIV_KEY_FILE
string "Boot policy manifest (BPM) private key"
depends on INTEL_CBNT_NEED_BPM_PRIV_KEY
help
Location of the boot policy manifest (BPM) private key file in .pem format.
if !INTEL_CBNT_BG_PROV_KM_USE_CFG_FILE && INTEL_CBNT_GENERATE_KM
menu "KM options"
config INTEL_CBNT_KM_REVISION
int "KM revision"
default 1
help
Version of the Key Manifest defined by the Platform Manufacturer.
The actual value is transparent to Boot Guard and is not processed by Boot Guard.
config INTEL_CBNT_KM_SVN
int "KM security Version Number"
range 0 15
default 0
help
This value is determined by the Platform Manufacturer.
Boot Guard uses this to compare it to the Key Manifest
Revocation Value (Revocation.KMSVN) in FPF.
If KMSVN < Revocation.KMSVN, the KM will be revoked. It will trigger ENF (the
enforcement policy).
IF KMSVN > Revocation.KMSVN, the Revocation.KMSVN will be set to the KMSVN.
Note: Once the value reaches 0Fh, revocation saturates and one can no longer
revoke newer KMs.
config INTEL_CBNT_KM_ID
int "KM ID"
default 1
help
This identifies the Key Manifest to be used for a platform.
This must match the Key Manifest Identifier programmed in
the field programmable fuses.
endmenu
endif # !INTEL_CBNT_BG_PROV_KM_USE_CFG_FILE
config INTEL_CBNT_KEY_MANIFEST_BINARY
string "KM (Key Manifest) binary location"
depends on !INTEL_CBNT_GENERATE_KM
help
Location of the Key Manifest (KM)
config INTEL_CBNT_BOOT_POLICY_MANIFEST_BINARY
string "BPM (Boot Policy Manifest) binary location"
help
Location of the Boot Policy Manifest (BPM)
config INTEL_CBNT_CMOS_OFFSET
hex
default 0x7e
help
Address in RTC CMOS used by CBNT. Uses 2 bytes. If using an option table
adapt the cmos.layout accordingly. The bytes should not be checksummed.
endif # INTEL_CBNT_SUPPORT
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