Re: [Xen-devel] [PATCH] Change spec of callback IRQ for PV-on-HV

To:	"Tian, Kevin" <kevin.tian@xxxxxxxxx>, <Doi.Tsunehisa@xxxxxxxxxxxxxx>
Subject:	Re: [Xen-devel] [PATCH] Change spec of callback IRQ for PV-on-HVM onIA64
From:	Keir Fraser <keir@xxxxxxxxxxxxx>
Date:	Tue, 21 Nov 2006 08:03:16 +0000
Cc:	xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, Alex Williamson <alex.williamson@xxxxxx>
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On 21/11/06 7:53 am, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote:

>>  In x86-linux, two instances are same. But in IA64-linux, previous one
>> is a external interrupt vector for xen-platform interruption. Although
>> latter one is a hardware IRQ id. Both values are not same in IA64-linux.
> 
> The callback value is the one pending to vIRR, which should be same
> as the one that platform-pci driver binds to. I'm still not sure the exact
> difference here. It should be arch-independent. You have to draw
> agreement between two sides.

On x86 the callback value is a Global System Interrupt.

 -- Keir


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Re: [Xen-devel] [PATCH] Change spec of callback IRQ for PV-on-HVM onIA64