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Re: [Xen-devel] Implementing split memory in Xen is annoyingly hard?
| To: | Sina Bahram <sbahram@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>, <xen-research@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] Implementing split memory in Xen is annoyingly hard? |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Fri, 12 Dec 2008 09:19:58 +0000 |
| Cc: | |
| Delivery-date: | Fri, 12 Dec 2008 01:20:12 -0800 |
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| In-reply-to: | <F6A8BB752F6C474389D6F79CF966CDFE@neutrino> |
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| Thread-index: | AclcJXuNUVD+QGa8QgqZc2JyDmh1sQAFVHON |
| Thread-topic: | [Xen-devel] Implementing split memory in Xen is annoyingly hard? |
| User-agent: | Microsoft-Entourage/12.14.0.081024 |
On 12/12/2008 06:47, "Sina Bahram" <sbahram@xxxxxxxxx> wrote: > #2: Xen absolutely does not, (can not?), cause a fault or other VM exit to > be generated upon an execute or a read of a page. It's not possible to make a page executable but not readable, so indeed I think you're stumped there, unless you can work out a hackish way to desynchronise the iTLB and the dTLB (an operation not supported architecturally by x86 of course). -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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