irqchip/gic-v3-its: Synchronise INT/CLEAR commands targetting a VLPI using VSYNC

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We have so far always injected/cleared VLPIs using either
INT+SYNC or CLEAR+SYNC sequences, but that's pretty wrong
for two reasons:

- SYNC only synchronises physical LPIs
- The collection ID that for the associated LPI doesn't match
  the redistributor the vPE is associated with

Instead, send an {INT,CLEAR}+VSYNC for forwarded LPIs, ensuring
that the ITS synchronises against the virtual pending table.

Reported-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20191108165805.3071-10-maz@kernel.org

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Marc Zyngier 2019-11-08 16:58:03 +00:00

parent 286146960a

commit ed0e4aa9cc

1 changed files with 75 additions and 4 deletions

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drivers/irqchip/irq-gic-v3-its.c

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