Re: help? need to enable VT-d for 2.6.27

Chris Friesen
2011-08-30T18:12:00Z

On 08/30/2011 11:55 AM, David Ahern wrote:
> On 08/30/2011 10:29 AM, Chris Friesen wrote:
>>
>> I'm in a bit of an odd situation. We run an embedded version of linux
>> on many different boards with different vendor agreements so it's
>> painful to upgrade kernel versions.
>>
>> I've been asked to provide VT-d support for KVM on our kernel (primarily
>> for mapping NIC VFs into the guests), and I'm trying to figure out my
>> best option to get a working implementation.
>
> I've had pains with VF passthrough with as late as a Fedora 14 kernel
> (2.6.35). Ended up punting and moving to 2.6.39.

Ouch. Not good news, but not entirely unexpected. Are you doing
anything complicated, or was this just basic functionality that wasn't
working?

>> Looking at the kvm git tree, kvm-77 seems to be based off 2.6.27. Should
>> I look at porting that?
>
> By 2.6.27 do you mean WRL3 or something else?

Yes, that's correct. (Wind River Linux 3, for the non-embedded types
out there.)

Chris

--
Chris Friesen
Software Developer
GENBAND
chris.friesen@genband.com