On 2016-07-05 19:46, Jan Kiszka wrote:
> On 2016-07-05 09:36, [email protected] wrote:
>> Hi,
>>
>> I just ran a hardware check for Jailhouse on my intel board using the 
>> following command: 
>>
>> tools/jailhouse-hardware-check configs/myboard.cell 
>>
>> I have almost everything available except "Caching mode = 0", as it can be 
>> seen from my screenshots that this is the only feature missing and overall 
>> it leads to a check failed. Could this potentially be one of the reasons why 
>> I am not able to start the root cell?.  
> 
> Weird, but apparently not the first case. What chipset is this target?
> The specification by Intel says, "Hardware implementations of this
> architecture [VT-d spec 2.3] must support a value of 0 in this field."
> That's how Jailhouse was written. We may extend it, but only if we
> aren't chasing legacy systems.

Checked our VT-d logic again, and there is actually no need for this
check - we already flush unconditionally and wouldn't be affected by
CM=1. Will send a patch.

Jan

-- 
Siemens AG, Corporate Technology, CT RDA ITP SES-DE
Corporate Competence Center Embedded Linux

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