leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

arm64/ptrace: Document extension of NT_ARM_TLS to cover TPIDR2_EL0

Browse Source 
In order to allow debuggers to discover lazily saved SME state we need
to provide access to TPIDR2_EL0, we will extend the existing NT_ARM_TLS
used for TPIDR to also include TPIDR2_EL0 as the second register in the
regset.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20220829154921.837871-3-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Mark Brown 2022-08-29 16:49:19 +01:00 committed by Catalin Marinas
parent ecaf4d3f73
commit f285da05c6
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
Documentation/arm64/sme.rst
View File

@ -331,6 +331,9 @@ The regset data starts with struct user_za_header, containing:
been read if a PTRACE_GETREGSET of NT_ARM_ZA were executed for each thread
when the coredump was generated.
* The NT_ARM_TLS note will be extended to two registers, the second register
will contain TPIDR2_EL0 on systems that support SME and will be read as
zero with writes ignored otherwise.
9. System runtime configuration
--------------------------------