[PATCH V2 00/46] KVM: arm64: Enable FGU (Fine Grained Undefined) for FEAT_FGT2 registers

[Anshuman Khandual]

This series enables fine grained undefined for FEAT_FGT2 managed registers
via adding their respective FGT and CGT trap configuration. But first this
adds many system register definitions in tools/sysreg, which are required
there after.

patches 1-43: define system registers in tools/sysreg format
patch     44: enables FEAT_FGT2 registers access from virtual EL2
patch     45: enables FGT for FEAT_FGT2
patch     46: enables CGT for FEAT_FGT2

Some notes:

As kvm_has_feat() does not support non-ID registers following replacements
have been made for validating presence of correspnding features

- ID_AA64DFR0_EL1.ExtTrcBuff is tested for HDFGRTR2_EL2.nPMSDSFR_EL1
- ID_AA64DFR0_EL1.PMSVer is tested for HDFGRTR2_EL2.nPMSDSFR_EL1

Following FGT enabled registers don't have corresponding CGT requirements

- TRCITECR_EL1
- PMSSCR_EL1
- PMCCNTSVR_EL1
- PMICNTSVR_EL1
- RCWSMASK_EL1
- ERXGSR_EL1
- PFAR_EL1

This series applies on v6.13-rc1

Changes in V2:

- Dropped patches for ID_AA64DFR0_EL1 and ID_AA64DFR2_EL1 (changes merged mainline)
- Added patch for ID_AA64MMFR4_EL1
- Updated all tools sysreg definitions as per DDI0601 2024-09
- Added HFGITR2_EL2 register based fields in encoding_to_fgt[]
- Updated HFGITR2_EL2_[nDCCIVAPS|TSBCSYNC] in kvm_init_nv_sysregs()
- Updated HFGITR2_EL2_[nDCCIVAPS|TSBCSYNC] in kvm_calculate_traps()
- Dropped check_cntr_accessible_N and CGT_CNTR_ACCESSIBLE_N constructs
- SYS_PMEVCNTSVR_EL1(N) access traps have been forwarded to CGT_MDCR_HPMN
- Updated check_mdcr_hpmn() to handle SYS_PMEVCNTSVR_EL1(N) registers
- Changed behaviour as BEHAVE_FORWARD_RW for CGT_MDCR_EnSPM

Changes in V1:

https://lore.kernel.org/all/20241001024356.1096072-1-anshuman.khandual@arm.com/

- Added all system register definitions required for FEAT_FGT2 traps
- Added all system register access traps managed with new FEAT_FGT2
  i.e HDFGRTR2_EL2, HDFGWTR2_EL2, HFGRTR2_GROUP, HFGWTR2_GROUP and
  HFGITR2_GROUP for their VNCR access, FGT and CGT
- Added all FGT for all register accesses managed with FEAT_FGT2
- Added all CGT for all register accesses managed with FEAT_FGT2

Changes in RFC V1:

https://lore.kernel.org/linux-arm-kernel/20240620065807.151540-1-anshuman.khandual@arm.com/

Cc: Marc Zyngier <maz at kernel.org>
Cc: Oliver Upton <oliver.upton at linux.dev>
Cc: James Morse <james.morse at arm.com>
Cc: Suzuki K Poulose <suzuki.poulose at arm.com>
Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Will Deacon <will at kernel.org>
Cc: Mark Brown <broonie at kernel.org>
Cc: linux-arm-kernel at lists.infradead.org
Cc: kvmarm at lists.linux.dev
Cc: linux-kernel at vger.kernel.org

Anshuman Khandual (46):
  arm64/sysreg: Update register fields for ID_AA64MMFR0_EL1
  arm64/sysreg: Update register fields for ID_AA64MMFR4_EL1
  arm64/sysreg: Update register fields for ID_AA64PFR0_EL1
  arm64/sysreg: Update register fields for TRBIDR_EL1
  arm64/sysreg: Add register fields for HDFGRTR2_EL2
  arm64/sysreg: Add register fields for HDFGWTR2_EL2
  arm64/sysreg: Add register fields for HFGITR2_EL2
  arm64/sysreg: Add register fields for HFGRTR2_EL2
  arm64/sysreg: Add register fields for HFGWTR2_EL2
  arm64/sysreg: Add register fields for MDSELR_EL1
  arm64/sysreg: Add register fields for PMSIDR_EL1
  arm64/sysreg: Add register fields for TRBMPAM_EL1
  arm64/sysreg: Add register fields for PMSDSFR_EL1
  arm64/sysreg: Add register fields for SPMDEVAFF_EL1
  arm64/sysreg: Add register fields for PFAR_EL1
  arm64/sysreg: Add register fields for PMIAR_EL1
  arm64/sysreg: Add register fields for PMECR_EL1
  arm64/sysreg: Add register fields for PMUACR_EL1
  arm64/sysreg: Add register fields for PMCCNTSVR_EL1
  arm64/sysreg: Add register fields for SPMSCR_EL1
  arm64/sysreg: Add register fields for SPMACCESSR_EL1
  arm64/sysreg: Add register fields for PMICNTR_EL0
  arm64/sysreg: Add register fields for PMICFILTR_EL0
  arm64/sysreg: Add register fields for SPMCR_EL0
  arm64/sysreg: Add register fields for SPMOVSCLR_EL0
  arm64/sysreg: Add register fields for SPMOVSSET_EL0
  arm64/sysreg: Add register fields for SPMINTENCLR_EL1
  arm64/sysreg: Add register fields for SPMINTENSET_EL1
  arm64/sysreg: Add register fields for SPMCNTENCLR_EL0
  arm64/sysreg: Add register fields for SPMCNTENSET_EL0
  arm64/sysreg: Add register fields for SPMSELR_EL0
  arm64/sysreg: Add register fields for PMICNTSVR_EL1
  arm64/sysreg: Add register fields for SPMIIDR_EL1
  arm64/sysreg: Add register fields for SPMDEVARCH_EL1
  arm64/sysreg: Add register fields for SPMCFGR_EL1
  arm64/sysreg: Add register fields for PMSSCR_EL1
  arm64/sysreg: Add register fields for PMZR_EL0
  arm64/sysreg: Add register fields for SPMCGCR0_EL1
  arm64/sysreg: Add register fields for SPMCGCR1_EL1
  arm64/sysreg: Add register fields for MDSTEPOP_EL1
  arm64/sysreg: Add register fields for ERXGSR_EL1
  arm64/sysreg: Add register fields for SPMACCESSR_EL2
  arm64/sysreg: Add remaining debug registers affected by HDFGxTR2_EL2
  KVM: arm64: nv: Add FEAT_FGT2 registers access from virtual EL2
  KVM: arm64: nv: Add FEAT_FGT2 registers based FGU handling
  KVM: arm64: nv: Add trap forwarding for FEAT_FGT2 described registers

 arch/arm64/include/asm/kvm_arm.h        |   20 +
 arch/arm64/include/asm/kvm_host.h       |   12 +
 arch/arm64/include/asm/sysreg.h         |   10 +
 arch/arm64/include/asm/vncr_mapping.h   |    5 +
 arch/arm64/kvm/emulate-nested.c         |  345 ++++++++
 arch/arm64/kvm/hyp/include/hyp/switch.h |   26 +
 arch/arm64/kvm/nested.c                 |   58 ++
 arch/arm64/kvm/sys_regs.c               |   70 ++
 arch/arm64/tools/sysreg                 | 1031 ++++++++++++++++++++++-
 9 files changed, 1570 insertions(+), 7 deletions(-)

-- 
2.25.1