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arm64/sme: Document ABI for TPIDR2 signal information 

In order to allow access to TPIDR2 from signal handlers we need to add it
to the signal context, document that we are doing so.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20221208-arm64-tpidr2-sig-v3-1-c77c6c8775f4@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Brown 2022-12-27 14:20:40 +00:00 committed by Catalin Marinas
parent b7bfaa761d
commit 17d0c4a27b
1 changed files with 3 additions and 0 deletions
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Documentation/arm64/sme.rst
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@ -111,6 +111,9 @@ be zeroed.
* Signal handlers are invoked with streaming mode and ZA disabled.
* A new signal frame record TPIDR2_MAGIC is added formatted as a struct
tpidr2_context to allow access to TPIDR2_EL0 from signal handlers.
* A new signal frame record za_context encodes the ZA register contents on
signal delivery. [1]