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Re: [Xen-devel] irq processing related question ....

To: Himanshu Raj <rhim@xxxxxxxxxxxxx>
Subject: Re: [Xen-devel] irq processing related question ....
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Wed, 9 Mar 2005 09:09:33 +0000
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On 9 Mar 2005, at 00:17, Himanshu Raj wrote:

I was looking at the definition of FIRST_EXTERNAL_VECTOR in
xen/include/asm-x86/irq.h and linux-2.6.10-.../mach-xen/irq_vectors.h. They are not the same. Furthermore, the hypercall vector is defined differently. Is there any correlation between these symbols in different files? I thought the
external intr vectors started after the 32 TRAPs, no?

I raised to 0x30 so that 0x20-0x2f can be used as 'fast trap' vectors by OSes that use them. If none of the BSDs use that trap range then FIRST_EXTERNAL_VECTOR can be dropped to 0x20 -- we are unlikely to be supporting paravirtual Windows OSes in teh forseeable future. :-)

 -- Keir

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