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| author |   Oliver Upton <oliver.upton@linux.dev> | 2024-02-21 05:42:50 +0000 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2024-02-23 21:46:02 +0000 |
| commit | a5c7f011cb584a4713b3defc533ed55e237210a4 (patch) | |
| tree | 56ea312c5bb35e820cdd8fa1fc76abdc4d36be8c | |
| parent | KVM: arm64: vgic: Use atomics to count LPIs (diff) | |
| download | wireguard-linux-a5c7f011cb584a4713b3defc533ed55e237210a4.tar.xz wireguard-linux-a5c7f011cb584a4713b3defc533ed55e237210a4.zip | |
KVM: arm64: vgic: Free LPI vgic_irq structs in an RCU-safe manner
Free the vgic_irq structs in an RCU-safe manner to allow reads of the
LPI configuration data to happen in parallel with the release of LPIs.
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240221054253.3848076-8-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
| -rw-r--r-- | arch/arm64/kvm/vgic/vgic.c | 2 | ||||
| -rw-r--r-- | include/kvm/arm_vgic.h | 1 |
2 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm64/kvm/vgic/vgic.c b/arch/arm64/kvm/vgic/vgic.c index 15dbd17b3a9e..3fedc58e663a 100644 --- a/arch/arm64/kvm/vgic/vgic.c +++ b/arch/arm64/kvm/vgic/vgic.c @@ -125,7 +125,7 @@ void __vgic_put_lpi_locked(struct kvm *kvm, struct vgic_irq *irq) xa_erase(&dist->lpi_xa, irq->intid); atomic_dec(&dist->lpi_count); - kfree(irq); + kfree_rcu(irq, rcu); } void vgic_put_irq(struct kvm *kvm, struct vgic_irq *irq) diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 71e9d719533b..47035946648e 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -117,6 +117,7 @@ struct irq_ops { struct vgic_irq { raw_spinlock_t irq_lock; /* Protects the content of the struct */ + struct rcu_head rcu; struct list_head ap_list; struct kvm_vcpu *vcpu; /* SGIs and PPIs: The VCPU |