Add an explicit note that measured boot is out of scope of the threat
model. For example, we have no threat related to the secure
management of measurements, nor do we list its security benefits
(e.g. in terms of repudiation).
This might be a future improvement to the threat model but for now
just acknowledge it is not considered.
Change-Id: I2fb799a2ef0951aa681a755a948bd2b67415d156
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Reword the description of threat #9 to make it more future-proof for
Arm CCA. By avoiding specific references to secure or non-secure
contexts, in favour of "worlds" and "security contexts", we make the
description equally applicable to 2-world and 4-world architectures.
Note that there are other threats that would benefit from such a
similar revamp but this is out of scope of this patch.
Also list malicious secure world code as a potential threat
agent. This seems to be an oversight in the first version of the
threat model (i.e. this change is not related to Arm CCA).
Change-Id: Id8c8424b0a801104c4f3dc70e344ee702d2b259a
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
The threat description was repeating the threat title.
Change-Id: I67de2c0aab6e86bf33eb91e7562e075fcb76259b
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
By nature, experimental features are incomplete pieces of work,
sometimes going under rapid change. Typically, the threat model
implications have not been fully considered yet.
Change-Id: Ice8d4273a789558e912f82cde592da4747b37fdf
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
- Add empty lines after titles.
- Reduce number of highlighting characters to fit title length.
- Remove most ``monospaced text``.
I think most of it looked weird in the rendered HTML version and
it had no obvious meaning.
Change-Id: I5f746a3de035d8ac59eec0af491c187bfe86dad7
Signed-off-by: Sandrine Bailleux <sandrine.bailleux@arm.com>
Threat model for the current, BL1-only R-class support.
Signed-off-by: Gary Morrison <gary.morrison@arm.com>
Change-Id: I8479d5cb30f3cf3919281cc8dc1f21cada9511e0
This patch expands the RME documentation with description of TF-A
changes for RME. It also modifies some other parts of TF-A documentation
to account for RME changes.
Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com>
Change-Id: I9e6feeee235f0ba4b767d239f15840f1e0c540bb
This is the first release of the public Trusted
Firmware A class threat model. This release
provides the baseline for future updates to be
applied as required by developments to the
TF-A code base.
Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com>
Change-Id: I3c9aadc46196837679f0b1377bec9ed4fc42ff11
Sandrine Bailleux
Gary Morrison
Zelalem Aweke
Olivier Deprez