From: Keir Fraser <keir@xen.org>
To: Dan Magenheimer <dan.magenheimer@oracle.com>,
Jan Beulich <JBeulich@suse.com>
Cc: xen-devel@lists.xen.org
Subject: Re: 32bit xen and "claim"
Date: Mon, 05 Nov 2012 19:50:14 +0000 [thread overview]
Message-ID: <CCBDC8F6.51043%keir@xen.org> (raw)
In-Reply-To: <00c25fab-a110-4f4b-a596-6cdfeb5b0d26@default>
On 05/11/2012 19:16, "Dan Magenheimer" <dan.magenheimer@oracle.com> wrote:
>> xen/include/asm-x86/config.h:DIRECTMAP_* (and the comment
>> preceding all those #define-s).
>
> Sorry if this is a silly question, but the hex value
> 0xffff880000000000 looks like a Linux kernel base address
> so it made me wonder:
>
> Do I understand correctly that the 5TB limit only applies
> because of legacy PV guests?
Yes. For HVM guests we can direct-map all physical memory, all the time. We
will only ever need ephemeral mappings on x86/64 when running PV guests.
-- Keir
next prev parent reply other threads:[~2012-11-05 19:50 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-01 20:34 32bit xen and "claim" Dan Magenheimer
2012-11-01 20:41 ` Jan Beulich
2012-11-01 20:55 ` Dan Magenheimer
2012-11-02 8:41 ` Jan Beulich
2012-11-05 19:16 ` Dan Magenheimer
2012-11-05 19:50 ` Keir Fraser [this message]
2012-11-06 9:44 ` Jan Beulich
2012-11-06 20:40 ` Dan Magenheimer
2012-11-07 8:25 ` Jan Beulich
2012-11-01 20:46 ` Tim Deegan
2012-11-01 20:57 ` Dan Magenheimer
2012-11-02 9:30 ` Tim Deegan
2012-11-05 19:00 ` Dan Magenheimer
2012-11-05 19:06 ` Tim Deegan
2012-11-05 19:51 ` Keir Fraser
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