From: Wei Huang <wei.huang2@amd.com>
To: Keir Fraser <keir@xen.org>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"james.harper@bendigoit.com.au" <james.harper@bendigoit.com.au>
Subject: Re: [PATCH][SVM] Fix 32bit Windows guest VMs save/restore
Date: Mon, 31 Jan 2011 15:43:10 -0600 [thread overview]
Message-ID: <4D472CEE.6060802@amd.com> (raw)
In-Reply-To: <C96CE57D.165CF%keir@xen.org>
This is true. I thought about it. Some problematic code path can be
"enter 32bit mode => execute sysenter => turn on long mode" (or vice
versa). In this case, SYSENTER MSRs should be copied from VMCB to vcpu
fields. But current Xen doesn't do so.
-Wei
On 01/31/2011 03:17 PM, Keir Fraser wrote:
> suspect the current approach has
> further bugs because I don't believe the canonical sysenter msr values are
> correctly shuffled between the vmcb and vcpu structures
next prev parent reply other threads:[~2011-01-31 21:43 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-31 17:33 [PATCH][SVM] Fix 32bit Windows guest VMs save/restore Wei Huang
2011-01-31 21:13 ` Keir Fraser
2011-01-31 21:17 ` Keir Fraser
2011-01-31 21:43 ` Wei Huang [this message]
2011-01-31 21:38 ` Wei Huang
2011-02-01 6:14 ` Keir Fraser
2011-02-01 6:25 ` Wei Huang
2011-02-01 8:14 ` Keir Fraser
2011-02-01 21:06 ` Wei Huang
2011-02-01 22:35 ` Keir Fraser
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