[GIT PULL] KVM/arm64 fixes for 6.10, take #1

[Marc Zyngier]

Paolo,

Here's a large-ish set of fixes for 6.10, the bulk of it addressing
the sorry state of pKVM's handling of FP/SVE (kudos to Fuad for sticking
with it and getting the series in shape).

The rest is a more esoteric set of AArch32 and NV fixes, details in the
tag as usual.

Please pull,

        M.

The following changes since commit 1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0:

  Linux 6.10-rc1 (2024-05-26 15:20:12 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git tags/kvmarm-fixes-6.10-1

for you to fetch changes up to afb91f5f8ad7af172d993a34fde1947892408f53:

  KVM: arm64: Ensure that SME controls are disabled in protected mode (2024-06-04 15:06:33 +0100)

----------------------------------------------------------------
KVM/arm64 fixes for 6.10, take #1

- Large set of FP/SVE fixes for pKVM, addressing the fallout
  from the per-CPU data rework and making sure that the host
  is not involved in the FP/SVE switching any more

- Allow FEAT_BTI to be enabled with NV now that FEAT_PAUTH
  is copletely supported

- Fix for the respective priorities of Failed PAC, Illegal
  Execution state and Instruction Abort exceptions

- Fix the handling of AArch32 instruction traps failing their
  condition code, which was broken by the introduction of
  ESR_EL2.ISS2

- Allow vpcus running in AArch32 state to be restored in
  System mode

- Fix AArch32 GPR restore that would lose the 64 bit state
  under some conditions

----------------------------------------------------------------
Fuad Tabba (9):
      KVM: arm64: Reintroduce __sve_save_state
      KVM: arm64: Fix prototype for __sve_save_state/__sve_restore_state
      KVM: arm64: Abstract set/clear of CPTR_EL2 bits behind helper
      KVM: arm64: Specialize handling of host fpsimd state on trap
      KVM: arm64: Allocate memory mapped at hyp for host sve state in pKVM
      KVM: arm64: Eagerly restore host fpsimd/sve state in pKVM
      KVM: arm64: Consolidate initializing the host data's fpsimd_state/sve in pKVM
      KVM: arm64: Refactor CPACR trap bit setting/clearing to use ELx format
      KVM: arm64: Ensure that SME controls are disabled in protected mode

Marc Zyngier (5):
      KVM: arm64: Fix AArch32 register narrowing on userspace write
      KVM: arm64: Allow AArch32 PSTATE.M to be restored as System mode
      KVM: arm64: AArch32: Fix spurious trapping of conditional instructions
      KVM: arm64: nv: Fix relative priorities of exceptions generated by ERETAx
      KVM: arm64: nv: Expose BTI and CSV_frac to a guest hypervisor

 arch/arm64/include/asm/el2_setup.h      |  6 +--
 arch/arm64/include/asm/kvm_arm.h        |  6 +++
 arch/arm64/include/asm/kvm_emulate.h    | 71 ++++++++++++++++++++++++++--
 arch/arm64/include/asm/kvm_host.h       | 25 +++++++++-
 arch/arm64/include/asm/kvm_hyp.h        |  4 +-
 arch/arm64/include/asm/kvm_pkvm.h       |  9 ++++
 arch/arm64/kvm/arm.c                    | 76 +++++++++++++++++++++++++++++
 arch/arm64/kvm/emulate-nested.c         | 21 +++++----
 arch/arm64/kvm/fpsimd.c                 | 11 +++--
 arch/arm64/kvm/guest.c                  |  3 +-
 arch/arm64/kvm/hyp/aarch32.c            | 18 ++++++-
 arch/arm64/kvm/hyp/fpsimd.S             |  6 +++
 arch/arm64/kvm/hyp/include/hyp/switch.h | 36 +++++++-------
 arch/arm64/kvm/hyp/include/nvhe/pkvm.h  |  1 -
 arch/arm64/kvm/hyp/nvhe/hyp-main.c      | 84 +++++++++++++++++++++++++++++----
 arch/arm64/kvm/hyp/nvhe/pkvm.c          | 17 ++-----
 arch/arm64/kvm/hyp/nvhe/setup.c         | 25 +++++++++-
 arch/arm64/kvm/hyp/nvhe/switch.c        | 24 ++++++++--
 arch/arm64/kvm/hyp/vhe/switch.c         | 12 +++--
 arch/arm64/kvm/nested.c                 |  6 ++-
 arch/arm64/kvm/reset.c                  |  3 ++
 21 files changed, 391 insertions(+), 73 deletions(-)