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Re: [Xen-devel] [PATCH] svm: Avoid VINTR injection during NMI shadow
| To: | Wei Wang2 <wei.wang2@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] svm: Avoid VINTR injection during NMI shadow |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Fri, 7 May 2010 17:56:32 +0100 |
| Cc: | |
| Delivery-date: | Fri, 07 May 2010 09:57:52 -0700 |
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| In-reply-to: | <201005071641.50013.wei.wang2@xxxxxxx> |
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| Thread-topic: | [Xen-devel] [PATCH] svm: Avoid VINTR injection during NMI shadow |
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I think the if statement should be:
if ((vmcb->general1_intercepts & GENERAL1_INTERCEPT_IRET) &&
(intack.source == hvm_intsrc_nmi))
return;
Which I think deals properly and specifically with this hang problem.
What do you think?
-- Keir
On 07/05/2010 15:41, "Wei Wang2" <wei.wang2@xxxxxxx> wrote:
> Hi,
> I had observed that if xen injects and intercepts VINTR during NMI shadow, and
> if the xen injects NMI into guest at a very hight frequency, guest vcpu will
> hang. Attached patch avoids VINTR injection when guest is handling a NMI.
>
> Thanks,
>
> Wei
> Signed-off-by: Wei Wang <wei.wang2@xxxxxxx>
> Reviewed-by: Wei Huang<wei.huang2@xxxxxxx>
> --
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