[PATCH v2 0/5] ... and FWB for all

[Marc Zyngier <maz@kernel.org>]

[Yes, I have since learned that FWB doesn't always mean "Force Write
 Back". I'm not judging.]

This is v2 for this small series teaching pKVM about the benefits
(haha) of using FWB on the host S2 page-tables.

* From v1 [1]:

  - Dropped the stage2_pte_cacheable() hack after both Will and Alex
    made the valid point that I can't read

  - Killed stage2_has_fwb() altogether

  - Collected RBs and TBs, thanks to Joey and Fuad!

[1] https://lore.kernel.org/r/20260119105651.255693-1-maz@kernel.org

Marc Zyngier (5):
  arm64: Add MT_S2{,_FWB}_AS_S1 encodings
  KVM: arm64: Add KVM_PGTABLE_S2_AS_S1 flag
  KVM: arm64: Switch pKVM host S2 over to KVM_PGTABLE_S2_AS_S1
  KVM: arm64: Kill KVM_PGTABLE_S2_NOFWB
  KVM: arm64: Simplify PAGE_S2_MEMATTR

 arch/arm64/include/asm/kvm_pgtable.h  |  7 +++----
 arch/arm64/include/asm/memory.h       | 11 ++++++++---
 arch/arm64/include/asm/pgtable-prot.h |  4 ++--
 arch/arm64/kvm/hyp/nvhe/mem_protect.c |  4 +++-
 arch/arm64/kvm/hyp/pgtable.c          | 26 ++++++++++++++------------
 5 files changed, 30 insertions(+), 22 deletions(-)

-- 
2.47.3