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Diffstat (limited to 'docs/design/firmware-design.rst')
| -rw-r--r-- | docs/design/firmware-design.rst | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/docs/design/firmware-design.rst b/docs/design/firmware-design.rst index 21b82346..e4e2bc1d 100644 --- a/docs/design/firmware-design.rst +++ b/docs/design/firmware-design.rst @@ -2564,7 +2564,7 @@ Armv8.3-A to the context that is saved when doing a world switch. The TF-A itself has support for pointer authentication at runtime - that can be enabled by setting both options ``ENABLE_PAUTH`` and + that can be enabled by setting ``BRANCH_PROTECTION`` option to non-zero and ``CTX_INCLUDE_PAUTH_REGS`` to 1. This enables pointer authentication in BL1, BL2, BL31, and the TSP if it is used. @@ -2577,6 +2577,12 @@ Armv8.3-A enabling PAuth is lower because the compiler will use the optimized PAuth instructions rather than the backwards-compatible ones. +Armv8.5-A +~~~~~~~~~ + +- Branch Target Identification feature is selected by ``BRANCH_PROTECTION`` + option set to 1. This option defaults to 0 and this is an experimental feature. + Armv7-A ~~~~~~~ |