Merge branch kvm-arm64/ctr-el0 into kvmarm/next

Merge branch kvm-arm64/ctr-el0 into kvmarm/next

* kvm-arm64/ctr-el0:
  : Support for user changes to CTR_EL0, courtesy of Sebastian Ott
  :
  : Allow userspace to change the guest-visible value of CTR_EL0 for a VM,
  : so long as the requested value represents a subset of features supported
  : by hardware. In other words, prevent the VMM from over-promising the
  : capabilities of hardware.
  :
  : Make this happen by fitting CTR_EL0 into the existing infrastructure for
  : feature ID registers.
  KVM: selftests: Assert that MPIDR_EL1 is unchanged across vCPU reset
  KVM: arm64: nv: Unfudge ID_AA64PFR0_EL1 masking
  KVM: selftests: arm64: Test writes to CTR_EL0
  KVM: arm64: rename functions for invariant sys regs
  KVM: arm64: show writable masks for feature registers
  KVM: arm64: Treat CTR_EL0 as a VM feature ID register
  KVM: arm64: unify code to prepare traps
  KVM: arm64: nv: Use accessors for modifying ID registers
  KVM: arm64: Add helper for writing ID regs
  KVM: arm64: Use read-only helper for reading VM ID registers
  KVM: arm64: Make idregs debugfs iterator search sysreg table directly
  KVM: arm64: Get sys_reg encoding from descriptor in idregs_debug_show()

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>