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docs: remove redundant Measured Boot interface info 

A separate design document for Measured Boot covers the porting
guidelines for the Measured Boot interfaces. As a result,
the Measured Boot interfaces have been removed from the porting
guide and a link to the Measured Boot design document has been
provided.

Change-Id: Ia6bd2620d830aea6aececab4af7e10a6d737f025
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
pull/1999/head
Manish V Badarkhe 1 year ago
parent
5038f1f90e
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a1c93550bc
1 changed files with 6 additions and 109 deletions
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  1. 115
      docs/porting-guide.rst

115
docs/porting-guide.rst
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@ -1509,43 +1509,6 @@ This function returns SMC_ARCH_CALL_SUCCESS if the platform supports
the SMCCC function specified in the argument; otherwise returns
SMC_ARCH_CALL_NOT_SUPPORTED.
Function : plat_mboot_measure_image()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::
Argument : unsigned int, image_info_t *
Return : int
When the MEASURED_BOOT flag is enabled:
- This function measures the given image and records its measurement using
the measured boot backend driver.
- On the Arm FVP port, this function measures the given image using its
passed id and information and then records that measurement in the
Event Log buffer.
- This function must return 0 on success, a signed integer error code
otherwise.
When the MEASURED_BOOT flag is disabled, this function doesn't do anything.
Function : plat_mboot_measure_critical_data()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::
Argument : unsigned int, const void *, size_t
Return : int
When the MEASURED_BOOT flag is enabled:
- This function measures the given critical data structure and records its
measurement using the measured boot backend driver.
- This function must return 0 on success, a signed integer error code
otherwise.
When the MEASURED_BOOT flag is disabled, this function doesn't do anything.
Function : plat_can_cmo()
~~~~~~~~~~~~~~~~~~~~~~~~~
@ -1813,42 +1776,6 @@ This function must return 0 on success, a non-null error code otherwise.
The default implementation of this function asserts therefore platforms must
override it when using the FWU feature.
Function : bl1_plat_mboot_init() [optional]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::
Argument : void
Return : void
When the MEASURED_BOOT flag is enabled:
- This function is used to initialize the backend driver(s) of measured boot.
- On the Arm FVP port, this function is used to initialize the Event Log
backend driver, and also to write header information in the Event Log buffer.
When the MEASURED_BOOT flag is disabled, this function doesn't do anything.
Function : bl1_plat_mboot_finish() [optional]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::
Argument : void
Return : void
When the MEASURED_BOOT flag is enabled:
- This function is used to finalize the measured boot backend driver(s),
and also, set the information for the next bootloader component to
extend the measurement if needed.
- On the Arm FVP port, this function is used to pass the base address of
the Event Log buffer and its size to BL2 via tb_fw_config to extend the
Event Log buffer with the measurement of various images loaded by BL2.
It results in panic on error.
When the MEASURED_BOOT flag is disabled, this function doesn't do anything.
Boot Loader Stage 2 (BL2)
-------------------------
@ -1980,42 +1907,6 @@ element in the boot sequence. If there are no more boot sources then it
must return 0, otherwise it must return 1. The default implementation
of this always returns 0.
Function : bl2_plat_mboot_init() [optional]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::
Argument : void
Return : void
When the MEASURED_BOOT flag is enabled:
- This function is used to initialize the backend driver(s) of measured boot.
- On the Arm FVP port, this function is used to initialize the Event Log
backend driver with the Event Log buffer information (base address and
size) received from BL1. It results in panic on error.
When the MEASURED_BOOT flag is disabled, this function doesn't do anything.
Function : bl2_plat_mboot_finish() [optional]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::
Argument : void
Return : void
When the MEASURED_BOOT flag is enabled:
- This function is used to finalize the measured boot backend driver(s),
and also, set the information for the next bootloader component to extend
the measurement if needed.
- On the Arm FVP port, this function is used to pass the Event Log buffer
information (base address and size) to non-secure(BL33) and trusted OS(BL32)
via nt_fw and tos_fw config respectively. It results in panic on error.
When the MEASURED_BOOT flag is disabled, this function doesn't do anything.
Boot Loader Stage 2 (BL2) at EL3
--------------------------------
@ -3664,6 +3555,12 @@ by the drivers and callers, as the system does not yet provide a means of
dynamically allocating memory. This may also have the affect of limiting the
amount of open resources per driver.
Measured Boot Platform Interface
--------------------------------
Enabling the MEASURED_BOOT flag adds extra platform requirements. Please refer
to :ref:`Measured Boot Design` for more details.
--------------
*Copyright (c) 2013-2023, Arm Limited and Contributors. All rights reserved.*

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