Re: [Xen-devel] [PATCH] iommu/quirk: disable shared EPT for Sandybridge and earlier processors.

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 01.09.15 at 16:18, <andrew.cooper3@xxxxxxxxxx> wrote:
> On 31/08/15 09:09, Jan Beulich wrote:
>>>>> On 28.08.15 at 17:41, <Anshul Makkar anshul.makkar@xxxxxxxxxx> wrote:
>>> --- a/docs/misc/xen-command-line.markdown
>>> +++ b/docs/misc/xen-command-line.markdown
>>> @@ -896,7 +896,7 @@ debug hypervisor only).
>>>  
>>>  > `sharept`
>>>  
>>> -> Default: `true`
>>> +> Default: `true` if newer than SandyBridge or `false` if Sandybridge or 
>>> earlier.
>> This neglects the AMD side.
> 
> The AMD side has iommu_hap_pt_share unconditionally disabled, for
> reasons pertaining to grant mapped frames.

Yet that doesn't eliminate the desire to have the correct default
spelled out here.

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel