lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Thu, 23 Jul 2020 00:37:29 +0000
From:   "Venkataramanan, Anirudh" <>
To:     "" <>,
        "Wang, Haiyue" <>
CC:     "" <>,
        "" <>,
        "" <>,
        "Bowers, AndrewX" <>,
        "Kirsher, Jeffrey T" <>,
        "" <>,
        "Nguyen, Anthony L" <>,
        "Lu, Nannan" <>
Subject: Re: [net-next 1/5] ice: add the virtchnl handler for AdminQ command

On Wed, 2020-07-15 at 11:03 -0700, Jakub Kicinski wrote:
> On Wed, 15 Jul 2020 01:17:26 +0000 Wang, Haiyue wrote:
> > > Could you say a little more about the application and motivation
> > > for
> > > this?
> > 
> > Sure, I will try to describe the whole story.
> > 
> > > We are talking about a single control domain here, correct?  
> > 
> > Correct.
> We have a long standing policy of not supporting or helping
> bifurcated
> drivers.

From what I understand, a bifurcated driver carves out the host
interface netdev's queues (resources if you want to further generalize
this) and allows another entity to control/use them. If this is the
definition, then DCF is not bifurcating the driver.
DCF is on top of SR-IOV VFs and the device resources required for the
DCF VF are made available by the device through the PCI configuration
space during SR-IOV init. This part isn't anything different from the
usual SR-IOV VF instantiation. The DCF feature adds the ability for a
trusted VF to add flow rules. So this is really just an extension of
the VF-PF interface that allows advanced flow/switch rules programming.
Additionally, the driver also has a list of operations that the DCF VF
is allowed to execute.

Can you please clarify how you (and the community) define bifurcated


Powered by blists - more mailing lists