Re: [Xen-devel] Read-only locking of Guest Memory pages

To:	Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Subject:	Re: [Xen-devel] Read-only locking of Guest Memory pages
From:	Srujan Kotikela <ksrujandas@xxxxxxxxx>
Date:	Tue, 14 Jun 2011 11:38:13 -0500
Cc:	xen-devel@xxxxxxxxxxxxxxxxxxx
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Hi Tim,

I am trying to implement a secure architecture where a process' (selected) memory pages have to be set as read-only. The process will send the virtual address of pages required (through a custom hypercall) to be set read-only. I need to compute the physical address of the pages and set them read-only.

--
Srujan D. Kotikela

On Tue, Jun 14, 2011 at 3:14 AM, Tim Deegan <Tim.Deegan@xxxxxxxxxx> wrote:

Hi,

At 14:52 -0500 on 13 Jun (1307976734), Srujan Kotikela wrote:
> Does Xen provide any mechanism to set read-only access/lock on guest's
> pages?

Yes, Xen has lots of code that makes guest memory read-only for various
reasons, and one of them might be suitable. What's your overall goal?

(BTW, you might want to read
http://wiki.xensource.com/xenwiki/AskingXenDevelQuestions)

Cheers,

Tim.

--
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Xen Platform Team
Citrix Systems UK Ltd. (Company #02937203, SL9 0BG)

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Re: [Xen-devel] Read-only locking of Guest Memory pages