Oliver Upton 78a0055555 KVM: arm64: Ensure vgic_ready() is ordered against MMIO registration ... kvm_vgic_map_resources() prematurely marks the distributor as 'ready', potentially allowing vCPUs to enter the guest before the distributor's MMIO registration has been made visible. Plug the race by marking the distributor as ready only after MMIO registration is completed. Rely on the implied ordering of synchronize_srcu() to ensure the MMIO registration is visible before vgic_dist::ready. This also means that writers to vgic_dist::ready are now serialized by the slots_lock, which was effectively the case already as all writers held the slots_lock in addition to the config_lock. Fixes: 59112e9c39 ("KVM: arm64: vgic: Fix a circular locking issue") Signed-off-by: Oliver Upton <oliver.upton@linux.dev> Link: https://lore.kernel.org/r/20241017001947.2707312-3-oliver.upton@linux.dev Signed-off-by: Marc Zyngier <maz@kernel.org>		2024-10-17 09:20:48 +01:00
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trace.h
vgic-debug.c
vgic-init.c	KVM: arm64: Ensure vgic_ready() is ordered against MMIO registration	2024-10-17 09:20:48 +01:00
vgic-irqfd.c
vgic-its.c
vgic-kvm-device.c	KVM: arm64: vgic: Don't check for vgic_ready() when setting NR_IRQS	2024-10-17 09:20:48 +01:00
vgic-mmio-v2.c
vgic-mmio-v3.c
vgic-mmio.c
vgic-mmio.h
vgic-v2.c
vgic-v3.c
vgic-v4.c
vgic.c
vgic.h