[PATCH v4 00/16] KVM: arm64: Add NV GICv3 support

Marc Zyngier
2025-02-25T17:29:45Z

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 [4].

At this stage, I think this is good to go.

* From v3 [3]:

- Added a comment indicating the relative priority of L2->L1 IRQ
handling as a request

- Rebased on 6.14-rc3

* 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/20241217151331.934077-1-maz@kernel.org
[2] https://lore.kernel.org/r/20250112170845.1181891-1-maz@kernel.org
[3] https://lore.kernel.org/r/20250206154925.1109065-14-maz@kernel.org
[4] 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 | 13 +
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, 834 insertions(+), 117 deletions(-)
create mode 100644 arch/arm64/kvm/vgic/vgic-v3-nested.c

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2.39.2