Commit 17d0c4a2 authored by Mark Brown's avatar Mark Brown Committed by Catalin Marinas
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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: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20221208-arm64-tpidr2-sig-v3-1-c77c6c8775f4@kernel.org


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent b7bfaa76

Documentation/arm64/sme.rst

+3 −0
Original line number Diff line number Diff line
@@ -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]