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Re: [Qemu-devel] [PATCH] pc: Clean up PIC-to-APIC IRQ path

From: Edgar E. Iglesias
Subject: Re: [Qemu-devel] [PATCH] pc: Clean up PIC-to-APIC IRQ path
Date: Mon, 5 Sep 2011 12:47:47 +0200
User-agent: Mutt/1.5.21 (2010-09-15)

On Mon, Sep 05, 2011 at 12:28:50PM +0300, Avi Kivity wrote:

> Query is needed when a line is masked internally, or when a device is 
> hot-plugged.
> We can work around masking by caching the level in the device even 
> though the line is masked, and querying the cache when the line is 
> unmasked, but that is artificial, and requires live-migrating the cache 
> (which isn't true state).  We can't work around the hotplug case.

Yup, hotplug messes everything up :) At least if you want to plug into
arbitrary places in the tree.


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