[0/4] arm64/sysreg: Get rid of *_ELx as fields for EL12 accessors

Message

Marc Zyngier Dec. 7, 2024, 7:07 p.m. UTC

We keep adding *_ELx definition to the sysreg as an abstraction for
the mapping between an EL1 register and its EL12 counterpart.

But nothing in the architecture has these ELx suffixes to describe
such abstraction. When they are mentioned, it always is as a shortcut
for EL1, EL2 or EL3, and never for EL12. That's because *_EL12 are
*not* registers. They are accessors, nothing else. So what we
currently have is not only bizarre, it is actively wrong.

This small series aims are injecting some sanity, by explicitly
describing EL12 registers as mappings to EL1 registers, and keeping
the ELx description as fields for the EL{1,2} registers.

Marc Zyngier (4):
  arm64/sysreg: Allow a 'Mapping' descriptor for system registers
  arm64/sysreg: Get rid of the TCR2_EL1x SysregFields
  arm64/sysreg: Convert *_EL12 accessors to Mapping
  arm64/sysreg: Get rid of CPACR_ELx SysregFields

 arch/arm64/include/asm/el2_setup.h      |  6 ++--
 arch/arm64/include/asm/kvm_arm.h        |  2 --
 arch/arm64/include/asm/kvm_emulate.h    | 40 ++++++++++++-------------
 arch/arm64/include/asm/kvm_nested.h     |  8 ++---
 arch/arm64/kernel/cpufeature.c          |  4 +--
 arch/arm64/kvm/at.c                     |  6 ++--
 arch/arm64/kvm/emulate-nested.c         |  2 +-
 arch/arm64/kvm/fpsimd.c                 |  2 +-
 arch/arm64/kvm/hyp/include/hyp/switch.h |  4 +--
 arch/arm64/kvm/hyp/nvhe/hyp-main.c      |  4 +--
 arch/arm64/kvm/hyp/nvhe/pkvm.c          |  2 +-
 arch/arm64/kvm/hyp/nvhe/switch.c        |  6 ++--
 arch/arm64/kvm/hyp/vhe/switch.c         | 16 +++++-----
 arch/arm64/mm/proc.S                    |  5 ++--
 arch/arm64/tools/gen-sysreg.awk         |  2 +-
 arch/arm64/tools/sysreg                 | 39 ++++++++++++------------
 16 files changed, 73 insertions(+), 75 deletions(-)