Re: [Xen-devel] Virtual Interrupt Delivery

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, Feb 27, 2017 at 09:13:29PM +0300, Dmitry Rockosov wrote:
> Hi guys,
> 
> Do you know when *recognized* Virtual Interrupt on VM-Entry will be
> delivered if Virtual-Interrupt Delivery is enabled and interrupt delivery
> is blocking by STI?

This sounds like a good question to the Intel maintainers, CC-ing them.

> 
> Previously, VMM used Interrupt-Window, but as I see in XEN code,
> Interrupt-Window
> is not used when Virtual Interrupt Delivery is enabled.

Right, the Intel SDM has a whole section about that.
> 
> Does it mean, we will get Virtual Interrupt on the next VM-entry?

By my understanding of the Intel SDM it depends on whether the
vector is one of those that the CPU can inject without involving
the VMM.

I would recommend you read the Intel SDM - the answer may be right
there.

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