[PATCH v5 00/10] KVM: arm64: Allow userspace to modify CTR_EL0

[Oliver Upton <oliver.upton@linux.dev>]

As I'd mentioned on the list, here is my rework of Sebastian's CTR_EL0
series. Changes this time around:

 - Drop the cross-validation of the guest's CTR_EL0 with CLIDR_EL1 and
   the CCSIDR_EL1 hierarchy, instead independently checking these
   registers against the system's CTR_EL0 value.

 - Rework the idregs debugfs interface to print all VM scoped feature ID
   registers, which now includes CTR_EL0.

 - Only reset the VM scoped value of CTR_EL0 once for a VM

 - Make feature ID register accesses go through read / write helpers,
   with the intention of abstracting the layout of the registers +
   adding sanity checks to writers.

What I didn't do after all is come up with a better generic way to store
ID registers at the VM scope, but the hope is that the accessors will
make that trivial to change in the future.

Oliver Upton (5):
  KVM: arm64: Get sys_reg encoding from descriptor in
    idregs_debug_show()
  KVM: arm64: Make idregs debugfs iterator search sysreg table directly
  KVM: arm64: Use read-only helper for reading VM ID registers
  KVM: arm64: Add helper for writing ID regs
  KVM: arm64: nv: Use accessors for modifying ID registers

Sebastian Ott (5):
  KVM: arm64: unify code to prepare traps
  KVM: arm64: Treat CTR_EL0 as a VM feature ID register
  KVM: arm64: show writable masks for feature registers
  KVM: arm64: rename functions for invariant sys regs
  KVM: selftests: arm64: Test writes to CTR_EL0

 arch/arm64/include/asm/kvm_emulate.h          |  40 +--
 arch/arm64/include/asm/kvm_host.h             |  26 +-
 arch/arm64/kvm/arm.c                          |   2 +-
 arch/arm64/kvm/nested.c                       | 256 +++++++++---------
 arch/arm64/kvm/pmu-emul.c                     |   2 +-
 arch/arm64/kvm/sys_regs.c                     | 140 ++++++----
 .../selftests/kvm/aarch64/set_id_regs.c       |  16 ++
 7 files changed, 262 insertions(+), 220 deletions(-)


base-commit: 1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0
-- 
2.45.2.627.g7a2c4fd464-goog