Re: [Xen-devel] SMAP/SMEP issues with 32-bit pv guests

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 01/08/16 13:24, Wang, Yong Y wrote:
>> -----Original Message-----
>> From: Andrew Cooper [mailto:andrew.cooper3@xxxxxxxxxx]
>> Sent: Monday, August 1, 2016 6:16 PM
>> To: Wu, Feng <feng.wu@xxxxxxxxx>
>> Cc: Nakajima, Jun <jun.nakajima@xxxxxxxxx>; Wang, Yong Y
>> <yong.y.wang@xxxxxxxxx>; Jan Beulich (JBeulich@xxxxxxxx)
>> <JBeulich@xxxxxxxx>; xen-devel@xxxxxxxxxxxxx
>> Subject: Re: SMAP/SMEP issues with 32-bit pv guests
>>
>> On 28/06/16 02:58, Wu, Feng wrote:
>>> Hi Andy,
>>>
>>> As you know, SMAP/SMEP may affect the 32-bit pv guests, after discussed
>> internally, our current idea is that we can just disable this two feature 
>> for Xen
>> hypervisor itself, hence only enable it for HVM guests. Do you think this is
>> acceptable from your perspective?
>>
>> So you are suggesting that Xen detects SMEP/SMAP, doesn't turn it on for
>> itself, but does allow HVM guests to use it?
>>
> Yes, that is correct.
>
>> I suppose that is a slight improvement over the current situation.
>>
> Do you mind being a bit more clear on this? Is this something you want to see 
> or do you want something else?

It is an improvement, so go ahead.

~Andrew

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