KVM: arm64: nv: Shadow stage-2 page table handling

Here's the thurd version of the shadow stage-2 handling for NV support on arm64.

* From v2 [2]

- Simplified the S2 walker by dropping a bunch of redundant fields from the walker info structure

- Added some more lockdep assertions (Oliver)

- Added more precise comments for the TTL-like annotations in the shadow S2 (Oliver)

* From v1 [1]

- Reworked the allocation of shadow S2 structures at init time to be slightly clearer

- Lots of small cleanups

- Rebased on v6.10-rc1

[1] https://lore.kernel.org/r/[email protected]

Christoffer Dall (2):
KVM: arm64: nv: Implement nested Stage-2 page table walk logic
KVM: arm64: nv: Unmap/flush shadow stage 2 page tables

Marc Zyngier (14):
KVM: arm64: nv: Support multiple nested Stage-2 mmu structures
KVM: arm64: nv: Handle shadow stage 2 page faults
KVM: arm64: nv: Add Stage-1 EL2 invalidation primitives
KVM: arm64: nv: Handle EL2 Stage-1 TLB invalidation
KVM: arm64: nv: Handle TLB invalidation targeting L2 stage-1
KVM: arm64: nv: Handle TLBI VMALLS12E1{,IS} operations
KVM: arm64: nv: Handle TLBI ALLE1{,IS} operations
KVM: arm64: nv: Handle TLBI IPAS2E1{,IS} operations
KVM: arm64: nv: Handle FEAT_TTL hinted TLB operations
KVM: arm64: nv: Tag shadow S2 entries with guest's leaf S2 level
KVM: arm64: nv: Invalidate TLBs based on shadow S2 TTL-like
information
KVM: arm64: nv: Add handling of outer-shareable TLBI operations
KVM: arm64: nv: Add handling of range-based TLBI operations
KVM: arm64: nv: Add handling of NXS-flavoured TLBI operations

 arch/arm64/include/asm/esr.h        |   1 +
 arch/arm64/include/asm/kvm_asm.h    |   2 +
 arch/arm64/include/asm/kvm_host.h   |  36 ++
 arch/arm64/include/asm/kvm_mmu.h    |  26 +
 arch/arm64/include/asm/kvm_nested.h | 127 +++++
 arch/arm64/include/asm/sysreg.h     |  17 +
 arch/arm64/kvm/arm.c                |  11 +
 arch/arm64/kvm/hyp/vhe/switch.c     |  51 +-
 arch/arm64/kvm/hyp/vhe/tlb.c        | 147 ++++++
 arch/arm64/kvm/mmu.c                | 213 ++++++--
 arch/arm64/kvm/nested.c             | 781 +++++++++++++++++++++++++++-
 arch/arm64/kvm/reset.c              |   6 +
 arch/arm64/kvm/sys_regs.c           | 398 ++++++++++++++
 13 files changed, 1775 insertions(+), 41 deletions(-)

2.39.2