Re: port-amd64/49150: xrstor is privileged in Xen

[Jeff Rizzo <riz%NetBSD.org@localhost>]

The following reply was made to PR port-amd64/49150; it has been noted by GNATS.

From: Jeff Rizzo <riz%NetBSD.org@localhost>
To: Manuel Bouyer <bouyer%antioche.eu.org@localhost>, gnats-bugs%NetBSD.org@localhost
Cc: port-amd64-maintainer%NetBSD.org@localhost, gnats-admin%NetBSD.org@localhost, 
 netbsd-bugs%NetBSD.org@localhost, jnemeth%CornerstoneService.ca@localhost
Subject: Re: port-amd64/49150: xrstor is privileged in Xen
Date: Tue, 28 Oct 2014 10:34:59 -0700

 On 10/28/14 12:34 AM, Manuel Bouyer wrote:
 > On Mon, Oct 27, 2014 at 04:39:01PM -0700, Jeff Rizzo wrote:
 >> On 10/27/14 4:10 PM, Jeff Rizzo wrote:
 >>>   Given that these are in use on Amazon EC2 instances, I'm going to work
 >>>   around the problem in a similar fashion for now.
 >> I just looked a little more closely at the existing workaround, and now I'm
 >> not sure what the right thing to do is - should I set x86_xsave_features to
 >> 0 for Xen in general?
 > As it shows up on Intel CPUs too, I guess it's a reasonable
 > woraround for now.
 >
 
 I can confirm that if I set x86_xsave_features to 0 for Xen, the problem 
 AMIs boot on the problem CPUs.  I will commit the change later today.