[PATCH v4 00/19] KVM: arm64: Debug cleanups

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

Hopefully the last spin! Addressed some review comments, and snuck in
one more cleanup to the sysreg handlers since that was quite a mess too.

v3 -> v4:
 - Collect Tested-by tags from James (thanks!)
 - Delete stray if condition, second attempt (Marc)
 - Hoist writes to MDCR_EL2 into kvm_arm_setup_mdcr_el2()
 - Get rid of the sysreg accessor mess for DBGxVR/DBGxCR

v3: https://lore.kernel.org/kvmarm/20241209180926.2161373-1-oliver.upton@linux.dev/

Oliver Upton (19):
  KVM: arm64: Drop MDSCR_EL1_DEBUG_MASK
  KVM: arm64: Get rid of __kvm_get_mdcr_el2() and related warts
  KVM: arm64: Track presence of SPE/TRBE in kvm_host_data instead of
    vCPU
  KVM: arm64: Move host SME/SVE tracking flags to host data
  KVM: arm64: Write MDCR_EL2 directly from kvm_arm_setup_mdcr_el2()
  KVM: arm64: Evaluate debug owner at vcpu_load()
  KVM: arm64: Clean up KVM_SET_GUEST_DEBUG handler
  KVM: arm64: Select debug state to save/restore based on debug owner
  KVM: arm64: Remove debug tracepoints
  KVM: arm64: Remove vestiges of debug_ptr
  KVM: arm64: Use debug_owner to track if debug regs need save/restore
  KVM: arm64: Reload vCPU for accesses to OSLAR_EL1
  KVM: arm64: Compute MDCR_EL2 at vcpu_load()
  KVM: arm64: Don't hijack guest context MDSCR_EL1
  KVM: arm64: Manage software step state at load/put
  KVM: arm64: nv: Honor MDCR_EL2.TDE routing for debug exceptions
  KVM: arm64: Avoid reading ID_AA64DFR0_EL1 for debug save/restore
  KVM: arm64: Fold DBGxVR/DBGxCR accessors into common set
  KVM: arm64: Promote guest ownership for DBGxVR/DBGxCR reads

 arch/arm64/include/asm/kvm_asm.h           |   5 +-
 arch/arm64/include/asm/kvm_host.h          |  94 ++---
 arch/arm64/include/asm/kvm_nested.h        |   1 +
 arch/arm64/kvm/arm.c                       |  14 +-
 arch/arm64/kvm/debug.c                     | 380 +++++++--------------
 arch/arm64/kvm/emulate-nested.c            |  23 +-
 arch/arm64/kvm/fpsimd.c                    |  12 +-
 arch/arm64/kvm/guest.c                     |  31 +-
 arch/arm64/kvm/handle_exit.c               |   5 +-
 arch/arm64/kvm/hyp/include/hyp/debug-sr.h  |  42 +--
 arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h |  43 ++-
 arch/arm64/kvm/hyp/nvhe/debug-sr.c         |  13 +-
 arch/arm64/kvm/hyp/nvhe/hyp-main.c         |   8 -
 arch/arm64/kvm/hyp/vhe/debug-sr.c          |   5 -
 arch/arm64/kvm/sys_regs.c                  | 249 ++++----------
 arch/arm64/kvm/trace_handle_exit.h         |  75 ----
 16 files changed, 350 insertions(+), 650 deletions(-)


base-commit: 78d4f34e2115b517bcbfe7ec0d018bbbb6f9b0b8
-- 
2.39.5