From: Keir Fraser <keir@xensource.com>
To: "Petersson, Mats" <Mats.Petersson@amd.com>,
Keir Fraser <keir@xensource.com>,
PUCCETTI Armand <armand.puccetti@cea.fr>,
xen-devel@lists.xensource.com
Subject: Re: More page-table questions.
Date: Mon, 12 Mar 2007 16:32:21 +0000 [thread overview]
Message-ID: <C21B3115.B46B%keir@xensource.com> (raw)
In-Reply-To: <907625E08839C4409CE5768403633E0B018E1A53@sefsexmb1.amd.com>
On 12/3/07 16:26, "Petersson, Mats" <Mats.Petersson@amd.com> wrote:
> Are the page-tables ever updated directly by the guest, or is it all
> done via hyper-calls?
Leaf PTEs (i.e., really just PTEs, not PDEs) can be directly written from
the point-of-view of the guest. In fact they are trapped and emulated by
Xen. The guest is somewhat aware of this because it has explicitly
write-protected all its pagetables, so if it were to attempt the direct
write on native hardware in these circumstances it would receive a page
fault.
-- Keir
next prev parent reply other threads:[~2007-03-12 16:32 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <E1HQkNQ-0002f5-Pl@host-192-168-0-1-bcn-london>
2007-03-12 16:10 ` Xen-devel Digest, Vol 25, Issue 93 PUCCETTI Armand
2007-03-12 16:19 ` Petersson, Mats
2007-03-12 16:23 ` Keir Fraser
2007-03-12 16:26 ` More page-table questions Petersson, Mats
2007-03-12 16:32 ` Keir Fraser [this message]
2007-03-12 16:35 ` Petersson, Mats
2007-03-12 16:38 ` Keir Fraser
2007-03-15 22:15 ` Questions about device/event channels in Xen Liang Yang
2007-03-16 0:34 ` Mark Williamson
2007-03-16 6:02 ` Liang Yang
2007-03-16 6:02 ` Liang Yang
2007-03-16 8:45 ` Keir Fraser
2007-03-16 17:30 ` Does Dom0 always get interrupts first before they are delivered to other guest domains? Liang Yang
2007-03-16 17:40 ` Petersson, Mats
2007-03-16 18:48 ` Liang Yang
2007-03-21 0:37 ` Mark Williamson
2007-03-21 1:23 ` Liang Yang
2007-03-21 1:23 ` Liang Yang
2007-03-21 8:31 ` Does Dom0 always get interrupts first before they aredelivered " Tian, Kevin
2007-03-21 9:13 ` Does Dom0 always get interrupts first before they are delivered " Petersson, Mats
2007-04-07 16:59 ` Mark Williamson
2007-04-12 0:20 ` Does Dom0 always get interrupts first before theyare " Liang Yang
2007-04-12 14:00 ` Petersson, Mats
2007-04-12 20:15 ` Does Dom0 always get interrupts first beforetheyare " Liang Yang
2007-03-19 16:33 ` Does Xen also plan to move the back-end driver to the stub domain for HVM? Liang Yang
2007-03-19 16:45 ` Petersson, Mats
2007-03-19 18:20 ` Anthony Liguori
2007-03-19 19:21 ` Liang Yang
2007-03-19 20:20 ` Anthony Liguori
2007-03-19 21:56 ` Question about reserving one CPU for the Xen hypervisor in case of vm exit Liang Yang
2007-03-20 10:13 ` Petersson, Mats
2007-03-20 10:03 ` Re: Does Xen also plan to move the back-end driver to the stub domain for HVM? Petersson, Mats
2007-03-16 3:17 ` Questions about device/event channels in Xen Daniel Stodden
2007-03-16 8:38 ` Petersson, Mats
2007-03-12 17:27 ` More page-table questions PUCCETTI Armand
2007-03-12 17:42 ` Petersson, Mats
2007-03-13 16:25 ` Mark Williamson
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