KVM/arm64 updates for 6.12

Hi Paolo,

Here's the set of KVM/arm64 changes 6.12. The only two user-visible features are FP8 support and the new Stage-2 page-table dumper. The NV onslaught continues with the addition of the address translation instruction emulation, and we have a bunch of fixes all over the place (details in the tag text below).

Note that there is a very minor conflict with arm64 in -next, which is trivially resolved as [1].

Please pull,

	M.

[1] https://lore.kernel.org/linux-next/[email protected]

The following changes since commit 5be63fc19fcaa4c236b307420483578a56986a37:

Linux 6.11-rc5 (2024-08-25 19:07:11 +1200)

are available in the Git repository at:

git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git tags/kvmarm-6.12

for you to fetch changes up to 17a0005644994087794f6552d7a5e105d6976184:

Merge branch kvm-arm64/visibility-cleanups into kvmarm-master/next (2024-09-12 08:38:17 +0100)

----------------------------------------------------------------
KVM/arm64 updates for 6.12

* New features:

- Add a Stage-2 page table dumper, reusing the main ptdump infrastructure, and allowing easier debugging of the our page-table infrastructure

- Add FP8 support to the KVM/arm64 floating point handling.

- Add NV support for the AT family of instructions, which mostly results in adding a page table walker that deals with most of the complexity of the architecture.

* Improvements, fixes and cleanups:

- Add selftest checks for a bunch of timer emulation corner cases

- Fix the multiple of cases where KVM/arm64 doesn't correctly handle the guest trying to use a GICv3 that isn't advertised

- Remove REG_HIDDEN_USER from the sysreg infrastructure, making things little more simple

- Prevent MTE tags being restored by userspace if we are actively logging writes, as that's a recipe for disaster

- Correct the refcount on a page that is not considered for MTE tag copying (such as a device)

- Relax the synchronisation when walking a page table to split block mappings, moving it at the end the walk, as there is no need to perform it on every store.

- Fix boundary check when transfering memory using FFA

- Fix pKVM TLB invalidation, only affecting currently out of tree code but worth addressing for peace of mind

----------------------------------------------------------------
Colton Lewis (3):
KVM: arm64: Move data barrier to end of split walk
KVM: arm64: selftests: Ensure pending interrupts are handled in arch_timer test
KVM: arm64: selftests: Add arch_timer_edge_cases selftest

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

Marc Zyngier (47):
KVM: arm64: Move SVCR into the sysreg array
KVM: arm64: Add predicate for FPMR support in a VM
KVM: arm64: Move FPMR into the sysreg array
KVM: arm64: Add save/restore support for FPMR
KVM: arm64: Honor trap routing for FPMR
KVM: arm64: Expose ID_AA64FPFR0_EL1 as a writable ID reg
KVM: arm64: Enable FP8 support when available and configured
KVM: arm64: Expose ID_AA64PFR2_EL1 to userspace and guests Merge branch kvm-arm64/tlbi-fixes-6.12 into kvmarm-master/next
KVM: arm64: Move GICv3 trap configuration to kvm_calculate_traps()
KVM: arm64: Force SRE traps when SRE access is not enabled
KVM: arm64: Force GICv3 trap activation when no irqchip is configured on VHE
KVM: arm64: Add helper for last ditch idreg adjustments
KVM: arm64: Zero ID_AA64PFR0_EL1.GIC when no GICv3 is presented to the guest
KVM: arm64: Add ICH_HCR_EL2 to the vcpu state
KVM: arm64: Add trap routing information for ICH_HCR_EL2
KVM: arm64: Honor guest requested traps in GICv3 emulation
KVM: arm64: Make most GICv3 accesses UNDEF if they trap
KVM: arm64: Unify UNDEF injection helpers
KVM: arm64: Add selftest checking how the absence of GICv3 is handled
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
KVM: arm64: Simplify handling of CNTKCTL_EL12
KVM: arm64: Simplify visibility handling of AArch32 SPSR_*
KVM: arm64: Get rid of REG_HIDDEN_USER visibility qualifier Merge branch kvm-arm64/mmu-misc-6.12 into kvmarm-master/next Merge branch kvm-arm64/fpmr into kvmarm-master/next
Merge branch kvm-arm64/vgic-sre-traps into kvmarm-master/next Merge branch kvm-arm64/selftests-6.12 into kvmarm-master/next Merge branch kvm-arm64/nv-at-pan into kvmarm-master/next
Merge branch kvm-arm64/s2-ptdump into kvmarm-master/next
Merge branch kvm-arm64/visibility-cleanups into kvmarm-master/next

Oliver Upton (1):
KVM: arm64: selftests: Cope with lack of GICv3 in set_id_regs

Sean Christopherson (2):
KVM: arm64: Release pfn, i.e. put page, if copying MTE tags hits ZONE_DEVICE
KVM: arm64: Disallow copying MTE to guest memory while KVM is dirty logging

Sebastian Ene (5):
KVM: arm64: Move pagetable definitions to common header
arm64: ptdump: Expose the attribute parsing functionality
arm64: ptdump: Use the ptdump description from a local context
arm64: ptdump: Don't override the level when operating on the stage-2 tables
KVM: arm64: Register ptdump with debugfs on guest creation

Snehal Koukuntla (1):
KVM: arm64: Add memory length checks and remove inline in do_ffa_mem_xfer

Will Deacon (2):
KVM: arm64: Invalidate EL1&0 TLB entries for all VMIDs in nvhe hyp init
KVM: arm64: Ensure TLBI uses correct VMID after changing context

 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_host.h                  |   22 +-
 arch/arm64/include/asm/kvm_mmu.h                   |    6 +
 arch/arm64/include/asm/kvm_nested.h                |   40 +-
 arch/arm64/include/asm/kvm_pgtable.h               |   42 +
 arch/arm64/include/asm/pgtable-hwdef.h             |    9 +
 arch/arm64/include/asm/ptdump.h                    |   43 +-
 arch/arm64/include/asm/sysreg.h                    |   22 +
 arch/arm64/kvm/Kconfig                             |   17 +
 arch/arm64/kvm/Makefile                            |    3 +-
 arch/arm64/kvm/arm.c                               |   15 +-
 arch/arm64/kvm/at.c                                | 1101 ++++++++++++++++++++
 arch/arm64/kvm/emulate-nested.c                    |   81 +-
 arch/arm64/kvm/fpsimd.c                            |    5 +-
 arch/arm64/kvm/guest.c                             |    6 +
 arch/arm64/kvm/hyp/include/hyp/fault.h             |    2 +-
 arch/arm64/kvm/hyp/include/hyp/switch.h            |    3 +
 arch/arm64/kvm/hyp/nvhe/ffa.c                      |   21 +-
 arch/arm64/kvm/hyp/nvhe/hyp-init.S                 |    2 +-
 arch/arm64/kvm/hyp/nvhe/hyp-main.c                 |    9 +
 arch/arm64/kvm/hyp/nvhe/switch.c                   |    9 +
 arch/arm64/kvm/hyp/nvhe/tlb.c                      |    6 +-
 arch/arm64/kvm/hyp/pgtable.c                       |   48 +-
 arch/arm64/kvm/hyp/vgic-v3-sr.c                    |   97 +-
 arch/arm64/kvm/hyp/vhe/switch.c                    |    3 +
 arch/arm64/kvm/nested.c                            |   55 +-
 arch/arm64/kvm/ptdump.c                            |  268 +++++
 arch/arm64/kvm/sys_regs.c                          |  386 ++++---
 arch/arm64/kvm/sys_regs.h                          |   23 +-
 arch/arm64/kvm/vgic/vgic-v3.c                      |   12 +
 arch/arm64/kvm/vgic/vgic.c                         |   14 +-
 arch/arm64/kvm/vgic/vgic.h                         |    6 +-
 arch/arm64/mm/ptdump.c                             |   70 +-
 tools/testing/selftests/kvm/Makefile               |    2 +
 .../selftests/kvm/aarch64/arch_timer_edge_cases.c  | 1062 +++++++++++++++++++
 tools/testing/selftests/kvm/aarch64/no-vgic-v3.c   |  175 ++++
 tools/testing/selftests/kvm/aarch64/set_id_regs.c  |    1 +
 tools/testing/selftests/kvm/aarch64/vgic_irq.c     |   11 +-
 .../selftests/kvm/include/aarch64/arch_timer.h     |   18 +-
 .../selftests/kvm/include/aarch64/processor.h      |    3 +
 .../testing/selftests/kvm/lib/aarch64/processor.c  |    6 +
 43 files changed, 3405 insertions(+), 331 deletions(-)
 create mode 100644 arch/arm64/kvm/at.c
 create mode 100644 arch/arm64/kvm/ptdump.c
 create mode 100644 tools/testing/selftests/kvm/aarch64/arch_timer_edge_cases.c
 create mode 100644 tools/testing/selftests/kvm/aarch64/no-vgic-v3.c

Pulled, thanks.

Paolo