From: "Mika Penttilä" <mika.penttila@nextfour.com>
To: <kvm@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: kvm vmx shadow paging question
Date: Mon, 15 Aug 2016 17:12:36 +0300 [thread overview]
Message-ID: <c28ccdf2-d9ea-6cf8-c651-7c606a487cc7@nextfour.com> (raw)
In-Reply-To: <6780347b-9fe8-4d67-8046-3a28a5889e42@nextfour.com>
On 13.08.2016 18:47, Mika Penttilä wrote:
> On 13.08.2016 17:38, Mika Penttilä wrote:
>
>> Hi,
>>
>> While studying the vmx code, and the shadow page tables usage (no ept involved),
>> I wondered the GUEST_CR3 usage. If no ept, GUEST_CR3 points to the shadow tables.
>> But the format of sptes is always 64 bit. How is that with 32 bit hosts, is the GUEST_CR3
>> similar to EPT format, 4 level 64 bit always or how is this working on 32 bit?
>>
>> Thanks,
>> Mika
>>
> Hmm seems non PAE 32 bit host without ept enabled is not supported combination, right ?
>
> --Mika
>
>
Ping, am I correct that for using shadow mmu with x86 kvm host you need at least 32bit PAE enabled host
(because shadow ptes are always 64 bit, in PAE or long format)?
--Mika
prev parent reply other threads:[~2016-08-15 14:47 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <9253e6f9-8c49-97e6-b602-6e93e2977c3c@nextfour.com>
2016-08-13 15:47 ` Mika Penttilä
2016-08-15 14:12 ` Mika Penttilä [this message]
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