From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jan Kiszka <jan.kiszka@siemens.com>
Subject: Re: [Bug 54471] New: nVMX: TRUE* MSRs unnecessary
Date: Mon, 25 Feb 2013 15:29:05 +0100
Message-ID: <512B7531.4050407@siemens.com>
References: <bug-54471-28872@https.bugzilla.kernel.org/>
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On 2013-02-25 15:04, bugzilla-daemon@bugzilla.kernel.org wrote:
> https://bugzilla.kernel.org/show_bug.cgi?id=54471
> 
>            Summary: nVMX: TRUE* MSRs unnecessary
>            Product: Virtualization
>            Version: unspecified
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: enhancement
>           Priority: P1
>          Component: kvm
>         AssignedTo: virtualization_kvm@kernel-bugs.osdl.org
>         ReportedBy: nyh@math.technion.ac.il
>         Regression: No
> 
> 
> According to the spec, the TRUE* MSRs are only necessary if bit 55 of VMX_BASIC
> is on. Since we don't set this bit, we don't need to provide these MSRs...
> So probably we shouldn't.

I tend to say we should (i.e. set bit 55) as there is the risk that
buggy guests could needlessly get confused when we expose very recent
features (like EPT) and do not provide such "old-fashioned" stuff.

Jan

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