From: "H. Peter Anvin" <hpa@zytor.com>
To: Stefan Bader <stefan.bader@canonical.com>
Cc: wei.y.yang@intel.com,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
haitao.shan@intel.com, xin.li@intel.com,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Subject: Re: Xen HVM regression on certain Intel CPUs
Date: Wed, 27 Mar 2013 10:44:28 -0700 [thread overview]
Message-ID: <51532FFC.6000106@zytor.com> (raw)
In-Reply-To: <51532EF5.6090300@canonical.com>
On 03/27/2013 10:40 AM, Stefan Bader wrote:
> On 27.03.2013 18:30, H. Peter Anvin wrote:
>> On 03/27/2013 10:28 AM, Stefan Bader wrote:
>>>
>>> I will need more time to look into this (and unlikely today)
>>> but it feels like at least the cpuid flags passed on to HVM
>>> guest may be not influenced by the smep boot argument. Probably
>>> rather something I could do by masking in the config of the
>>> guest (which could be another pain as I normally configure
>>> those via libvirt).
>>>
>>
>> There is an "nosmep" kernel command line option.
>
> Ignoring it on that side does help.
>
As one would expect. Are CPUID and /proc/cpuinfo still consistent
across all CPUs inside the HVM?
-hpa
next prev parent reply other threads:[~2013-03-27 17:44 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-27 15:26 Xen HVM regression on certain Intel CPUs Stefan Bader
2013-03-27 15:53 ` Stefan Bader
2013-03-27 16:04 ` Konrad Rzeszutek Wilk
2013-03-27 16:09 ` H. Peter Anvin
2013-03-27 16:24 ` Stefan Bader
2013-03-27 16:32 ` H. Peter Anvin
2013-03-27 16:32 ` Stefano Stabellini
2013-03-27 16:45 ` Stefan Bader
2013-03-27 16:52 ` H. Peter Anvin
2013-03-27 17:17 ` Stefan Bader
2013-03-27 17:23 ` H. Peter Anvin
2013-03-27 17:38 ` Stefan Bader
2013-03-28 13:34 ` Jan Beulich
2013-03-28 15:02 ` Stefan Bader
2013-03-28 16:39 ` Stefan Bader
2013-04-03 11:56 ` Stefan Bader
2013-04-03 12:43 ` Jan Beulich
2013-04-03 14:28 ` Keir Fraser
2013-04-03 15:00 ` Xu, Dongxiao
2013-04-03 15:48 ` H. Peter Anvin
2013-04-03 16:05 ` Jan Beulich
2013-03-27 17:28 ` Stefan Bader
2013-03-27 17:30 ` H. Peter Anvin
2013-03-27 17:40 ` Stefan Bader
2013-03-27 17:44 ` H. Peter Anvin [this message]
2013-03-27 20:24 ` Keir Fraser
2013-03-28 15:06 ` Stefan Bader
2013-03-28 15:42 ` H. Peter Anvin
2013-03-28 16:12 ` Stefan Bader
2013-03-27 16:18 ` H. Peter Anvin
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