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[Xen-devel] RE: [PATCH] Fix the RHEL4 guest hang

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>
Subject: [Xen-devel] RE: [PATCH] Fix the RHEL4 guest hang
From: "Kamble, Nitin A" <nitin.a.kamble@xxxxxxxxx>
Date: Fri, 5 May 2006 11:41:29 -0700
Cc: "Mallick, Asit K" <asit.k.mallick@xxxxxxxxx>, Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>
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Thread-index: AcZwEubzswxW9pD0Ti2uoWsCRbKWkwAX8ZZg
Thread-topic: [PATCH] Fix the RHEL4 guest hang
        You are right. There is a 32bit exception bitmap field for the
vmexit control. It covers the first 32 interrupts/exceptions such as
page faults gp faults, int3, into etc. int instruction interrupts start
after that. And the vmexit due to int instructions can not be avoided.

Thanks & Regards,
Open Source Technology Center, Intel Corp

>-----Original Message-----
>From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
>Is it not possible to specify that software interrupts do not cause a
>VMEXIT? That would seem to avoid the problem totally (as the original
>'int 0xff' wouldn't vmexit), but it looks like maybe it's not possible.
>  -- Keir

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