[v3,00/16] KVM: arm64: Add NV GICv3 support

Message

Marc Zyngier Feb. 6, 2025, 3:49 p.m. UTC

Here's a respin of the NV support for GICv3. The integration branch
containing this (and the rest of the NV stack) is still at [3].

* From v2 [2]:

  - Picked RBs from Andre, with thanks

  - Rebased on 6.14-rc1

* From v1 [1]:

  - Fix the default value for the MI INTID to PPI9, instead of
    something fairly random...

  - Fail KVM initialisation if asking for NV on HW without a virtual
    GICv3.

[1] https://lore.kernel.org/r/[e-mail]
[2] https://lore.kernel.org/r/[e-mail]
[3] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=kvm-arm64/nv-next

Andre Przywara (1):
  KVM: arm64: nv: Allow userland to set VGIC maintenance IRQ

Jintack Lim (1):
  KVM: arm64: nv: Respect virtual HCR_EL2.TWx setting

Marc Zyngier (13):
  arm64: sysreg: Add layout for ICH_HCR_EL2
  arm64: sysreg: Add layout for ICH_VTR_EL2
  arm64: sysreg: Add layout for ICH_MISR_EL2
  KVM: arm64: nv: Load timer before the GIC
  KVM: arm64: nv: Add ICH_*_EL2 registers to vpcu_sysreg
  KVM: arm64: nv: Plumb handling of GICv3 EL2 accesses
  KVM: arm64: nv: Sanitise ICH_HCR_EL2 accesses
  KVM: arm64: nv: Nested GICv3 emulation
  KVM: arm64: nv: Handle L2->L1 transition on interrupt injection
  KVM: arm64: nv: Add Maintenance Interrupt emulation
  KVM: arm64: nv: Propagate used_lrs between L1 and L0 contexts
  KVM: arm64: nv: Fold GICv3 host trapping requirements into guest setup
  KVM: arm64: nv: Fail KVM init if asking for NV without GICv3

Oliver Upton (1):
  KVM: arm64: nv: Request vPE doorbell upon nested ERET to L2

 .../virt/kvm/devices/arm-vgic-v3.rst          |  12 +-
 arch/arm64/include/asm/kvm_emulate.h          |  13 +
 arch/arm64/include/asm/kvm_host.h             |  45 +-
 arch/arm64/include/asm/kvm_hyp.h              |   2 +
 arch/arm64/include/asm/sysreg.h               |  30 --
 arch/arm64/include/uapi/asm/kvm.h             |   1 +
 arch/arm64/kvm/Makefile                       |   2 +-
 arch/arm64/kvm/arm.c                          |  20 +-
 arch/arm64/kvm/emulate-nested.c               |  18 +-
 arch/arm64/kvm/handle_exit.c                  |   6 +-
 arch/arm64/kvm/hyp/vgic-v3-sr.c               |  16 +-
 arch/arm64/kvm/nested.c                       |  12 +
 arch/arm64/kvm/sys_regs.c                     |  95 +++-
 arch/arm64/kvm/vgic-sys-reg-v3.c              |   8 +-
 arch/arm64/kvm/vgic/vgic-init.c               |  29 ++
 arch/arm64/kvm/vgic/vgic-kvm-device.c         |  29 +-
 arch/arm64/kvm/vgic/vgic-v3-nested.c          | 409 ++++++++++++++++++
 arch/arm64/kvm/vgic/vgic-v3.c                 |  44 +-
 arch/arm64/kvm/vgic/vgic-v4.c                 |  18 +-
 arch/arm64/kvm/vgic/vgic.c                    |  38 ++
 arch/arm64/kvm/vgic/vgic.h                    |   6 +
 arch/arm64/tools/sysreg                       |  48 ++
 drivers/irqchip/irq-apple-aic.c               |   8 +-
 include/kvm/arm_vgic.h                        |  10 +
 tools/arch/arm/include/uapi/asm/kvm.h         |   1 +
 tools/arch/arm64/include/asm/sysreg.h         |  30 --
 26 files changed, 833 insertions(+), 117 deletions(-)
 create mode 100644 arch/arm64/kvm/vgic/vgic-v3-nested.c