[virtio-dev] Re: [virtio-comment] Re: [PATCH v18] virtio-net: support inner header hash

["Michael S. Tsirkin" <mst@redhat.com>]

On Wed, Jun 21, 2023 at 07:39:19PM +0000, Parav Pandit wrote:
> 
> > From: Michael S. Tsirkin <mst@redhat.com>
> > Sent: Wednesday, June 21, 2023 3:36 PM
> > 
> > It can be helpful for debugging. E.g. if driver sets a bit that device does not
> > recognize, it can figure out that driver has it set in supported mask.
> Device is reporting error code anyway when it receives a unexpected command contents.

To driver, yes. But if you are debugging this from software device
side then getting info about driver state is helpful.

> > Or if it seems like a waste we can just ask drivers to put 0 there, works for me
> > too.
> 
> I fail to see this being any better or equal to two structures.

One structure is just simpler for software than two.

> > 
> > 
> > > Two structures are cleaner.
> > 
> > Frankly what's cleaner is what RSS is doing, supported mask in config space.
> > Was this discussed in some version? I don't remember.
> > 
> Yes, we discussed. 

Couldn't find it and I don't want us to repeat same agruments.
Which version had this field in config space?

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