[PATCH 0/5] KVM: arm64: Some VGIC-related fixes

[Oliver Upton <oliver.upton@linux.dev>]

Flushing out some patches I had sitting around before vacation:

 - The irqbypass hooks are not resilient to changes in the GSI<->MSI
   routing and can sometimes leave behind stale vLPI mappings for the
   VM. The fix is to resolve the VGIC IRQ using the host IRQ (which is
   stable) and nuking the vLPI mapping upon a routing change.

 - Closing another VGIC race where vCPU creation races with VGIC
   creation, leading to in-flight vCPUs entering the kernel w/o private
   IRQs allocated.

Applies to kvmarm-6.16.

Oliver Upton (5):
  KVM: arm64: Use lock guard in vgic_v4_set_forwarding()
  KVM: arm64: Protect vLPI translation with vgic_irq::irq_lock
  KVM: arm64: Resolve vLPI by host IRQ in vgic_v4_unset_forwarding()
  KVM: arm64: Unmap vLPIs affected by changes to GSI routing information
  KVM: arm64: vgic-init: Plug vCPU vs. VGIC creation race

 arch/arm64/kvm/arm.c            | 26 +++++++++-
 arch/arm64/kvm/vgic/vgic-init.c | 27 +++++++++-
 arch/arm64/kvm/vgic/vgic-its.c  | 48 ++++++++---------
 arch/arm64/kvm/vgic/vgic-v4.c   | 92 ++++++++++++++++++---------------
 include/kvm/arm_vgic.h          |  3 +-
 5 files changed, 125 insertions(+), 71 deletions(-)


base-commit: 1b85d923ba8c9e6afaf19e26708411adde94fba8
-- 
2.39.5