From: Christoph Egger <Christoph.Egger@amd.com>
To: Tim Deegan <tim@xen.org>
Cc: "xen-devel@lists.xen.org" <xen-devel@lists.xen.org>
Subject: Re: [PATCH] nestedsvm: fix paging mode
Date: Mon, 1 Oct 2012 15:50:30 +0200 [thread overview]
Message-ID: <50699FA6.6070805@amd.com> (raw)
In-Reply-To: <20120927145356.GG8831@ocelot.phlegethon.org>
On 09/27/12 16:53, Tim Deegan wrote:
> At 16:01 +0200 on 21 Sep (1348243291), Christoph Egger wrote:
>>
>> On VMRUN and VMEXIT emulation update the paging mode
>> for Shadow-on-Nested. This allows Xen to walk the
>> l1 hypervisors shadow page table correctly.
>> Problem found with 64bit Win7 and 32bit XPMode where
>> Win7 switches forth and back between long mode and
>> PAE legacy pagetables.
>>
>> Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
>
> Don't you have to do this in other cases as well? I think that
> shadow-on-shadow might need it, at least.
It is needed for all cases where the l1 guest does shadow paging.
This includes: Shadow-on-Nested and Shadow-on-Shadow.
Christoph
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next prev parent reply other threads:[~2012-10-01 13:50 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-21 14:01 [PATCH] nestedsvm: fix paging mode Christoph Egger
2012-09-27 14:53 ` Tim Deegan
2012-10-01 13:50 ` Christoph Egger [this message]
2012-10-04 10:37 ` Tim Deegan
2012-10-04 12:14 ` Christoph Egger
2012-10-04 13:23 ` Tim Deegan
2012-10-05 9:07 ` Christoph Egger
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