[PATCH 0/3] KVM: arm64: Get rid of REG_HIDDEN_USER

[Marc Zyngier]

REG_HIDDEN_USER was introduced as a way to deal with the ARMv8.3 flavour of
FEAT_NV, where most EL12 sysreg accesses would trap and yet be mapped to a
EL1 register (KVM doing in SW what FEAT_NV2 does in HW). This handling
imposed that the EL12 register shouldn't be visible to userspace, hence the
special REG_HIDDEN_USER visibility.

Since 4d4f52052ba8 ("KVM: arm64: nv: Drop EL12 register traps that are
redirected to VNCR") and the admission that KVM would never be supporting
the original FEAT_NV, REG_HIDDEN_USER only had a few users, all of which
could either be replaced by a more ad-hoc mechanism, or removed altogether.

This series goes ahead and cleans it up for good, removing a tiny bit of
unnecessary complexity.

Marc Zyngier (3):
  KVM: arm64: Simplify handling of CNTKCTL_EL12
  KVM: arm64: Simplify visibility handling of AArch32 SPSR_*
  KVM: arm64: Get rid of REG_HIDDEN_USER visibility qualifier

 arch/arm64/kvm/sys_regs.c | 52 +++++++++++++++------------------------
 arch/arm64/kvm/sys_regs.h | 14 ++---------
 2 files changed, 22 insertions(+), 44 deletions(-)

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2.39.2