[PATCH 0/8] KVM: arm64: Prefix of fixes from HAFDBS series (for 7.4)

[Oliver Upton <oupton@kernel.org>]

I kept on running into bugs as part of the HAFDBS series, especially in
dealing with emulated cache maintenance instructions. Everything seems
worthwhile for 7.4 so I've gone ahead and spun it off into a separate
series.

The bulk of the changes are addressing a subtle gap in KVM's handling of
coarse-grained traps. There could be instructions supported by the
hardware but unsupported for the VM which intersect with a CGT. When the
sysreg lacks an FGU description this has the effect of reinjecting
architecturally-invalid sysreg traps to the L1 hypervisor for the
visible feature set.

Besides that, abort injection has gotten a bit hairy, details found in
the last patch.

Tested on M2 and QEMU-TCG since the M2 lacks a lot of the necessary arch
features.

Oliver Upton (8):
  KVM: arm64: nv: Disallow KVM_CAP_ARM_MTE + FEAT_EL2
  KVM: arm64: nv: Add CGT description for FEAT_PoPS instructions
  KVM: arm64: Separate user / guest visibility flags
  KVM: arm64: nv: Treat the VNCR GICv3 registers as hidden from user
  KVM: arm64: Use ->visibility() to filter MTE CMO instructions
  KVM: arm64: Add sys_reg_descs for remaining MTE CMO instructions
  KVM: arm64: nv: Enforce sysreg visibility before evaulating guest
    traps
  KVM: arm64: Stop leaning on __kvm_inject_sea() for abort injection

 arch/arm64/kvm/arm.c             |  10 ++-
 arch/arm64/kvm/emulate-nested.c  |  26 +++++-
 arch/arm64/kvm/inject_fault.c    | 133 ++++++++++++++++++-------------
 arch/arm64/kvm/sys_regs.c        |  84 +++++++++++--------
 arch/arm64/kvm/sys_regs.h        |  27 +++++--
 arch/arm64/kvm/vgic-sys-reg-v3.c |   2 +-
 arch/arm64/kvm/vgic-sys-reg-v5.c |   2 +-
 7 files changed, 177 insertions(+), 107 deletions(-)


base-commit: 6628e7d4c6b25c8d18f1345e3a20d21829aae7e4
-- 
2.47.3