[v3,00/18] KVM: arm64: nv: Add support for address translation instructions

Message

Marc Zyngier Aug. 13, 2024, 10:05 a.m. UTC

This is the third revision of the address translation emulation for
NV support on arm64 previously posted at [1].

Thanks again to Alex for his continuous (contiguous? ;-) scrutiny on
this series.

* From v2:

  - Correct handling of the alignment implied by the contiguous bit in
    both S1 and S2 walkers

  - Correct handling of EL1&0 translation being disabled when
    HCR_EL2.{E2H,TGE} = {0,1}

  - Force S2 being enabled when HCR_EL2.DC = 1

  - Handle PAR_EL1.NSE as RES1

  - Report the full PA on a successful translation

  - Various cleanups

I've added the usual reviewers on Cc, plus people who explicitly asked
to be on it, and people who seem to be super keen on NV.

Patches on top of 6.11-rc1, tested on my usual M2 (so VHE only). FWIW,
I plan to take this into 6.12.

[1] https://lore.kernel.org/r/[e-mail]

Joey Gouly (1):
  KVM: arm64: Make kvm_at() take an OP_AT_*

Marc Zyngier (17):
  arm64: Add missing APTable and TCR_ELx.HPD masks
  arm64: Add PAR_EL1 field description
  arm64: Add system register encoding for PSTATE.PAN
  arm64: Add ESR_ELx_FSC_ADDRSZ_L() helper
  KVM: arm64: nv: Enforce S2 alignment when contiguous bit is set
  KVM: arm64: nv: Turn upper_attr for S2 walk into the full descriptor
  KVM: arm64: nv: Honor absence of FEAT_PAN2
  KVM: arm64: nv: Add basic emulation of AT S1E{0,1}{R,W}
  KVM: arm64: nv: Add basic emulation of AT S1E1{R,W}P
  KVM: arm64: nv: Add basic emulation of AT S1E2{R,W}
  KVM: arm64: nv: Add emulation of AT S12E{0,1}{R,W}
  KVM: arm64: nv: Make ps_to_output_size() generally available
  KVM: arm64: nv: Add SW walker for AT S1 emulation
  KVM: arm64: nv: Sanitise SCTLR_EL1.EPAN according to VM configuration
  KVM: arm64: nv: Make AT+PAN instructions aware of FEAT_PAN3
  KVM: arm64: nv: Plumb handling of AT S1* traps from EL2
  KVM: arm64: nv: Add support for FEAT_ATS1A

 arch/arm64/include/asm/esr.h           |    5 +-
 arch/arm64/include/asm/kvm_arm.h       |    1 +
 arch/arm64/include/asm/kvm_asm.h       |    6 +-
 arch/arm64/include/asm/kvm_nested.h    |   40 +-
 arch/arm64/include/asm/pgtable-hwdef.h |    9 +
 arch/arm64/include/asm/sysreg.h        |   22 +
 arch/arm64/kvm/Makefile                |    2 +-
 arch/arm64/kvm/at.c                    | 1098 ++++++++++++++++++++++++
 arch/arm64/kvm/emulate-nested.c        |    2 +
 arch/arm64/kvm/hyp/include/hyp/fault.h |    2 +-
 arch/arm64/kvm/nested.c                |   41 +-
 arch/arm64/kvm/sys_regs.c              |   60 ++
 12 files changed, 1256 insertions(+), 32 deletions(-)
 create mode 100644 arch/arm64/kvm/at.c