diff options
author | Zelalem Aweke <zelalem.aweke@arm.com> | 2021-07-09 11:37:10 -0500 |
---|---|---|
committer | Zelalem Aweke <zelalem.aweke@arm.com> | 2021-10-04 21:13:20 +0200 |
commit | 6c09af9f8b36cdfa1dc4d5052f7e4792f63fa88a (patch) | |
tree | 5b5680f229a9b4ab24ab2ca64fe1e03555948e52 /services | |
parent | 362182386bafbda9e6671be921fa30cc20610d30 (diff) | |
download | arm-trusted-firmware-6c09af9f8b36cdfa1dc4d5052f7e4792f63fa88a.tar.gz |
feat(rme): run BL2 in root world when FEAT_RME is enabled
This patch enables BL2 to run in root world (EL3) which is
needed as per the security model of RME-enabled systems.
Using the existing BL2_AT_EL3 TF-A build option is not convenient
because that option assumes TF-A BL1 doesn't exist, which is not
the case for RME-enabled systems. For the purposes of RME, we use
a normal BL1 image but we also want to run BL2 in EL3 as normally as
possible, therefore rather than use the special bl2_entrypoint
function in bl2_el3_entrypoint.S, we use a new bl2_entrypoint
function (in bl2_rme_entrypoint.S) which doesn't need reset or
mailbox initialization code seen in the el3_entrypoint_common macro.
The patch also cleans up bl2_el3_entrypoint.S, moving the
bl2_run_next_image function to its own file to avoid duplicating
code.
Signed-off-by: Zelalem Aweke <zelalem.aweke@arm.com>
Change-Id: I99821b4cd550cadcb701f4c0c4dc36da81c7ef55
Diffstat (limited to 'services')
0 files changed, 0 insertions, 0 deletions