[PATCH v3 00/27] KVM: arm64: SCTLR2, DoubleFault2, and NV external abort fixes

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

v2: https://lore.kernel.org/kvmarm/20250616230308.1192565-1-oliver.upton@linux.dev/

v2 -> v3:
 - Fix mask computation when SCLTR2_ELx.NMEA is set
 - Consolidate TMEA handling for all aborts, spin off NMEA (Marc)
 - Set up the fault context correctly for the injected abort (e.g.
   not setting HPFAR_EL2 when UNKNOWN) (Marc)
 - Don't use the guest hypervisor's VSESR when FEAT_RAS isn't
   implemented for the guest (Marc)

Marc Zyngier (1):
  KVM: arm64: Add helper to identify a nested context

Oliver Upton (26):
  arm64: Detect FEAT_SCTLR2
  arm64: Detect FEAT_DoubleFault2
  KVM: arm64: Treat vCPU with pending SError as runnable
  KVM: arm64: nv: Respect exception routing rules for SEAs
  KVM: arm64: nv: Honor SError exception routing / masking
  KVM: arm64: nv: Add FEAT_RAS vSError sys regs to table
  KVM: arm64: nv: Use guest hypervisor's vSError state
  KVM: arm64: nv: Advertise support for FEAT_RAS
  KVM: arm64: nv: Describe trap behavior of SCTLR2_EL1
  KVM: arm64: Wire up SCTLR2_ELx sysreg descriptors
  KVM: arm64: Context switch SCTLR2_ELx when advertised to the guest
  KVM: arm64: Enable SCTLR2 when advertised to the guest
  KVM: arm64: Describe SCTLR2_ELx RESx masks
  KVM: arm64: Factor out helper for selecting exception target EL
  KVM: arm64: nv: Ensure Address size faults affect correct ESR
  KVM: arm64: Route SEAs to the SError vector when EASE is set
  KVM: arm64: nv: Take "masked" aborts to EL2 when HCRX_EL2.TMEA is set
  KVM: arm64: nv: Honor SError routing effects of SCTLR2_ELx.NMEA
  KVM: arm64: nv: Enable vSErrors when HCRX_EL2.TMEA is set
  KVM: arm64: Advertise support for FEAT_SCTLR2
  KVM: arm64: Advertise support for FEAT_DoubleFault2
  KVM: arm64: Don't retire MMIO instruction w/ pending (emulated) SError
  KVM: arm64: selftests: Add basic SError injection test
  KVM: arm64: selftests: Test SEAs are taken to SError vector when
    EASE=1
  KVM: arm64: selftests: Add SCTLR2_EL1 to get-reg-list
  KVM: arm64: selftests: Catch up set_id_regs with the kernel

 arch/arm64/include/asm/kvm_emulate.h          |  51 +++-
 arch/arm64/include/asm/kvm_host.h             |  32 ++-
 arch/arm64/include/asm/kvm_nested.h           |   2 +
 arch/arm64/include/asm/vncr_mapping.h         |   2 +
 arch/arm64/kernel/cpufeature.c                |   9 +
 arch/arm64/kvm/arch_timer.c                   |   2 +-
 arch/arm64/kvm/arm.c                          |   9 +-
 arch/arm64/kvm/config.c                       |  28 +++
 arch/arm64/kvm/emulate-nested.c               |  49 +++-
 arch/arm64/kvm/guest.c                        |  33 +--
 arch/arm64/kvm/handle_exit.c                  |  24 +-
 arch/arm64/kvm/hyp/exception.c                |  10 +-
 arch/arm64/kvm/hyp/include/hyp/switch.h       |  53 +++-
 arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h    |  48 +++-
 arch/arm64/kvm/hyp/vgic-v3-sr.c               |   2 +-
 arch/arm64/kvm/hyp/vhe/sysreg-sr.c            |   6 +
 arch/arm64/kvm/inject_fault.c                 | 231 ++++++++++++------
 arch/arm64/kvm/mmio.c                         |  12 +-
 arch/arm64/kvm/mmu.c                          |  17 +-
 arch/arm64/kvm/nested.c                       |  49 +++-
 arch/arm64/kvm/sys_regs.c                     |  31 ++-
 arch/arm64/kvm/vgic/vgic-v3-nested.c          |   2 +-
 arch/arm64/tools/cpucaps                      |   1 +
 tools/testing/selftests/kvm/Makefile.kvm      |   2 +-
 .../arm64/{mmio_abort.c => external_aborts.c} | 159 +++++++++++-
 .../selftests/kvm/arm64/get-reg-list.c        |   7 +
 .../testing/selftests/kvm/arm64/set_id_regs.c |  14 +-
 .../selftests/kvm/include/arm64/processor.h   |  10 +
 28 files changed, 725 insertions(+), 170 deletions(-)
 rename tools/testing/selftests/kvm/arm64/{mmio_abort.c => external_aborts.c} (50%)


base-commit: 86731a2a651e58953fc949573895f2fa6d456841
-- 
2.39.5