From: Keir Fraser <keir@xen.org>
To: Konrad Rzeszutek Wilk <konrad@kernel.org>
Cc: Tim Deegan <tim@xen.org>, Jan Beulich <JBeulich@suse.com>,
xen-devel@lists.xen.org
Subject: Re: [PATCH] x86/mm: remove the linear mapping of the p2m tables
Date: Fri, 14 Sep 2012 21:55:40 +0100 [thread overview]
Message-ID: <CC79585C.4BD12%keir@xen.org> (raw)
In-Reply-To: <CACJDEmpMXLEvtv-Y8X6StBOd0B7jLZfvFG1B_Ru1_uUimU2kiA@mail.gmail.com>
On 14/09/2012 21:31, "Konrad Rzeszutek Wilk" <konrad@kernel.org> wrote:
>> Don't think so, since we'll continue to run old guests as pure PV.
>>
>> There was a backup for running on older CPUs, and that was to allow PVH
>> guests to run on shadow page tables. That's a totally separate compatibility
>> concern however.
>
> I am talking about the inverse. Running the "new" PV guests which do
> not have PV MMU
> enabled in them (since the PV MMU calls would not be necessary
> anymore) and running
> on non-NPT hardware.
>
> For that PV auto-xlat would be necessary.
These 'new' PV guests are PVH guests. We're talking about removing PV
auto-xlat, not disallowing PVH auto-xlat. Subtle difference, but PVH will
always run in an HVM container.
-- Keir
prev parent reply other threads:[~2012-09-14 20:55 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-13 14:01 [PATCH] x86/mm: remove the linear mapping of the p2m tables Tim Deegan
2012-09-13 14:23 ` Jan Beulich
2012-09-13 14:42 ` Tim Deegan
2012-09-13 14:58 ` Keir Fraser
2012-09-13 15:08 ` Jan Beulich
2012-09-13 15:17 ` Keir Fraser
2012-09-13 15:36 ` Jan Beulich
2012-09-13 15:11 ` Tim Deegan
2012-09-13 15:18 ` Keir Fraser
2012-09-13 20:43 ` Konrad Rzeszutek Wilk
2012-09-13 21:14 ` Keir Fraser
2012-09-14 20:31 ` Konrad Rzeszutek Wilk
2012-09-14 20:55 ` Keir Fraser [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=CC79585C.4BD12%keir@xen.org \
--to=keir@xen.org \
--cc=JBeulich@suse.com \
--cc=konrad@kernel.org \
--cc=tim@xen.org \
--cc=xen-devel@lists.xen.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).