Re: [PATCH] KVM: arm64: vgic-v4: Consistently request doorbell irq for blocking vCPU

On Mon, 10 Jul 2023 17:55:53 +0000, Oliver Upton wrote:

Xiang reports that VMs occasionally fail to boot on GICv4.1 systems when running a preemptible kernel, as it is possible that a vCPU is blocked without requesting a doorbell interrupt.

The issue is that any preemption that occurs between vgic_v4_put() and schedule() on the block path will mark the vPE as nonresident and *not* request a doorbell irq.

[...]

Applied to kvmarm/fixes, thanks!

[1/1] KVM: arm64: vgic-v4: Consistently request doorbell irq for blocking vCPU https://git.kernel.org/kvmarm/kvmarm/c/d30ea1f31ff5

-- Best, Oliver