[PATCH v4 00/28] KVM: arm64: NV trap forwarding infrastructure

[Marc Zyngier]

Another week, another version. Change log below.

I'll drop this into -next now, and see what happens.

* From v3 [3]:

  - Renamed trap_group to cgt_group_id (Eric)

  - Plenty of comment rework (Eric)

  - Fix HCR_EL2.FIEN handling (Miguel)

  - Fix missing validation of last MCB entry (Miguel)

  - Fix instance of recursive MCB (Jing)

  - Handle error return from xa_store()/xa_range_store() (Jing)

  - Propagate error generated from populate_nv_trap_config() (Jing)

  - Added more consistency checks for sysregs and trap bits

  - Added a line number entry, which is useful for debugging
    overlapping entries.

  - Fixed duplicate entries for SP_EL1, DBGDTRRX_EL0 and SCXTNUM_EL0

  - Correctly handle fine grained trapping for ERET

  - Collected RBs, with thanks

* From v2 [2]:

  - Another set up fixups thanks to Oliver, Eric and Miguel: TRCID
    bits, duplicate encodings, sanity checking, error handling at boot
    time, spelling mistakes...

  - Split the HFGxTR_EL2 patch in two patches: one that provides the
    FGT infrastructure, and one that provides the HFGxTR_EL2 traps. It
    makes it easier to review and matches the rest of the series.

  - Collected RBs, with thanks

* From v1 [1]:

  - Lots of fixups all over the map (too many to mention) after Eric's
    fantastic reviewing effort. Hopefully the result is easier to
    understand and less wrong

  - Amended Mark's patch to use the ARM64_CPUID_FIELDS() macro

  - Collected RBs, with thanks.

[1] https://lore.kernel.org/all/20230712145810.3864793-1-maz@kernel.org
[2] https://lore.kernel.org/all/20230728082952.959212-1-maz@kernel.org
[3] https://lore.kernel.org/all/20230808114711.2013842-1-maz@kernel.org

Marc Zyngier (27):
  arm64: Add missing VA CMO encodings
  arm64: Add missing ERX*_EL1 encodings
  arm64: Add missing DC ZVA/GVA/GZVA encodings
  arm64: Add TLBI operation encodings
  arm64: Add AT operation encodings
  arm64: Add debug registers affected by HDFGxTR_EL2
  arm64: Add missing BRB/CFP/DVP/CPP instructions
  arm64: Add HDFGRTR_EL2 and HDFGWTR_EL2 layouts
  KVM: arm64: Correctly handle ACCDATA_EL1 traps
  KVM: arm64: Add missing HCR_EL2 trap bits
  KVM: arm64: nv: Add FGT registers
  KVM: arm64: Restructure FGT register switching
  KVM: arm64: nv: Add trap forwarding infrastructure
  KVM: arm64: nv: Add trap forwarding for HCR_EL2
  KVM: arm64: nv: Expose FEAT_EVT to nested guests
  KVM: arm64: nv: Add trap forwarding for MDCR_EL2
  KVM: arm64: nv: Add trap forwarding for CNTHCTL_EL2
  KVM: arm64: nv: Add fine grained trap forwarding infrastructure
  KVM: arm64: nv: Add trap forwarding for HFGxTR_EL2
  KVM: arm64: nv: Add trap forwarding for HFGITR_EL2
  KVM: arm64: nv: Add trap forwarding for HDFGxTR_EL2
  KVM: arm64: nv: Add SVC trap forwarding
  KVM: arm64: nv: Expand ERET trap forwarding to handle FGT
  KVM: arm64: nv: Add switching support for HFGxTR/HDFGxTR
  KVM: arm64: nv: Expose FGT to nested guests
  KVM: arm64: Move HCRX_EL2 switch to load/put on VHE systems
  KVM: arm64: nv: Add support for HCRX_EL2

Mark Brown (1):
  arm64: Add feature detection for fine grained traps

 arch/arm64/include/asm/kvm_arm.h        |   50 +
 arch/arm64/include/asm/kvm_host.h       |    7 +
 arch/arm64/include/asm/kvm_nested.h     |    2 +
 arch/arm64/include/asm/sysreg.h         |  268 +++-
 arch/arm64/kernel/cpufeature.c          |    7 +
 arch/arm64/kvm/arm.c                    |    4 +
 arch/arm64/kvm/emulate-nested.c         | 1850 +++++++++++++++++++++++
 arch/arm64/kvm/handle_exit.c            |   29 +-
 arch/arm64/kvm/hyp/include/hyp/switch.h |  127 +-
 arch/arm64/kvm/nested.c                 |   11 +-
 arch/arm64/kvm/sys_regs.c               |   15 +
 arch/arm64/kvm/trace_arm.h              |   26 +
 arch/arm64/tools/cpucaps                |    1 +
 arch/arm64/tools/sysreg                 |  129 ++
 14 files changed, 2485 insertions(+), 41 deletions(-)

-- 
2.34.1