tree 0627386e23af1be5afe30d76178bf1b610bc6320
parent 7877cb91f1081754a1487c144d85dc0d2e2e7fc4
author Marc Zyngier <maz@kernel.org> 1686986715 +0100
committer Marc Zyngier <maz@kernel.org> 1686987077 +0100

irqchip/gic-v4.1: Properly lock VPEs when doing a directLPI invalidation

We normally rely on the irq_to_cpuid_[un]lock() primitives to make
sure nothing will change col->idx while performing a LPI invalidation.

However, these primitives do not cover VPE doorbells, and we have
some open-coded locking for that. Unfortunately, this locking is
pretty bogus.

Instead, extend the above primitives to cover VPE doorbells and
convert the whole thing to it.

Fixes: f3a059219bc7 ("irqchip/gic-v4.1: Ensure mutual exclusion between vPE affinity change and RD access")
Reported-by: Kunkun Jiang <jiangkunkun@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: Zenghui Yu <yuzenghui@huawei.com>
Cc: wanghaibin.wang@huawei.com