Re: [Xen-devel] [PATCH v10 6/6] passthrough/io: Fall back to remapping interrupt when we can't use VT-d PI

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Gao, Chao
> Sent: Wednesday, March 15, 2017 1:11 PM
> 
> The current logic of using VT-d pi is when guest configurates the pirq's
> destination vcpu to a single vcpu, the according IRTE is updated to posted
> format. If the destination of the pirq is multiple vcpus, we just use 
> interrupt
> remapping. 

From the patch I think you actually means the reverse - current
logic will stay in posted format.

> Obviously, we should fall back to remapping interrupt when
> guest wrongly configurate destination of pirq or makes it have multi-
> destination vcpus.
> 
> Signed-off-by: Chao Gao <chao.gao@xxxxxxxxx>

with above comment fixed:

Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>

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