From: Samuel Thibault <samuel.thibault@eu.citrix.com>
To: Daniel Li <dli@virtualiron.com>
Cc: xen-devel@lists.xensource.com
Subject: Re: vmcs_revision_id: do we care?
Date: Wed, 9 Jan 2008 16:18:16 +0000 [thread overview]
Message-ID: <20080109161816.GB4214@implementation.uk.xensource.com> (raw)
In-Reply-To: <4784F2BC.5020504@virtualiron.com>
Daniel Li, le Wed 09 Jan 2008 11:13:48 -0500, a écrit :
> Based on what I've heard, both IBM and Intel have been telling people
> this configuration is valid. From what I was able to dig out, Intel in
> their System Programming Guide: Virtual Machine Monitor Programming
> Considerations, published Nov. 2007, suggested when loading a VMCS onto
> a processor with a different vmcs_revision_id, instead of using VMPTRLD,
> one should use VMREAD to read out each field then use VMWRITE to write
> them back.
Which would mean quite some burden, even if valid... Buying a machine
that may require such slowdown is a no-go for me :)
Samuel
next prev parent reply other threads:[~2008-01-09 16:18 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-01-08 22:40 vmcs_revision_id: do we care? Daniel Li
2008-01-08 22:48 ` Keir Fraser
2008-01-09 16:13 ` Daniel Li
2008-01-09 16:18 ` Samuel Thibault [this message]
2008-01-09 19:25 ` Keir Fraser
2008-01-10 18:08 ` Keir Fraser
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