[PATCH 0/4] arm64: insn: fix sysreg encodings, simplify dependent code

[Ada Couprie Diaz]

Hello,

This is a follow-up to [0] which goes further than initially anticipated.
Indeed, after Vladimir's comment I checked what was going on
in more details and realized that the system register definitions had some
mistakes, were quite inconsistent and duplicated the sysreg definitions
in `arch/arm64/include/sysreg.h`.

Thus this series takes the approach of re-using the encodings we already
define and depend on, and making easier to re-use if needed.
That meant I could also clean up unecessary operations and distinctions.

This simplification _could_ be taken further by completely removing the
insn enum in favour of using the sysreg.h definitions directly,
but I figured it was useful to keep the enum for typing/argument hints.

I was unsure of how to split this series, so patch 2 and 3 could reasonably
be squashed into patch 4 if that does not make the commit too unscrutable.

Thank you in advance,
Ada

[0]: https://lore.kernel.org/r/20260928133034.243541-1-ada.coupriediaz@arm.com 

Ada Couprie Diaz (4):
  arm64: sysreg: generate TPIDR, SP and DAIF encodings
  arm64: insn: fix system register inconsistencies
  arm64: insn: operate on MSR/MRS sysreg field via defines
  arm64: insn: clean-up sysregs handling

 arch/arm64/include/asm/insn.h          | 41 ++++++++++----------------
 arch/arm64/include/asm/sysreg.h        |  8 -----
 arch/arm64/kernel/probes/decode-insn.c |  2 +-
 arch/arm64/lib/insn.c                  |  8 ++---
 arch/arm64/tools/sysreg                | 37 +++++++++++++++++++++++
 5 files changed, 57 insertions(+), 39 deletions(-)


base-commit: 93f51579e7df248780214094418f205253383cc5
-- 
2.43.0