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Re: [Xen-devel] [PATCH] nestedhvm: ASID emulation

To: Keir Fraser <keir.xen@xxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] nestedhvm: ASID emulation
From: Christoph Egger <Christoph.Egger@xxxxxxx>
Date: Fri, 15 Apr 2011 15:40:44 +0200
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On 04/15/11 14:53, Keir Fraser wrote:
On 15/04/2011 10:57, "Christoph Egger"<Christoph.Egger@xxxxxxx>  wrote:

On 04/15/11 11:24, Keir Fraser wrote:
On 15/04/2011 10:08, "Christoph Egger"<Christoph.Egger@xxxxxxx>   wrote:

Just found another fallout that got lost from my original patch.

After shutting down XP mode in Windows 7, Win7 turns off SVM in EFER
after about 30 seconds. When starting XP mode again, Win 7 turns SVM on
again.

Then nv_n2asid can be stale. Attached patch fixes this.

Should be using hvm_asid_flush_vcpu_asid(), so I'll fix the patch to use
that and then check it in.

There are a lot of regressions now... I assume the non-nested virtualization case got broken.

Attached patch covers the non-nested case (and contains the above discussed hvm_asid_flush_vcpu_asid() as it didn't appear yet upstream).

Signed-off-by: Christoph Egger<Christoph.Egger@xxxxxxx>


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Attachment: xen_nh_asid.diff
Description: xen_nh_asid.diff

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