Re: [PATCH IB/core 2/2] IB/cm: Send authentic pkey in REQ msg and check eligibility of the pkeys

[Jason Gunthorpe]

On Wed, May 16, 2018 at 08:14:50PM +0200, HÃkon Bugge wrote:
> 
> 
> > On 16 May 2018, at 20:01, Jason Gunthorpe <jgg@xxxxxxxx> wrote:
> > 
> > On Wed, May 16, 2018 at 07:46:10PM +0200, HÃkon Bugge wrote:
> > 
> >>   OK. Lets take one example. The pkey table contains 0xFFFF, 0x8001,
> >>   0x0001.
> >> 
> >>   The wce.pkey_index is 1 (i.e., pointing to 0x8001). Now, tell me, was
> >>   BTH.PKey 0x8001 (matches 0x8001) or was it 0x0001 (also matching
> >>   0x8001) ?
> > 
> > As far as the Linux core is concerned, it must have been 0x8001,
> > because the only way the pkey_index feature works properly is if
> > exact-match takes precedence over in-exact match.
> 
> And now if the table only contains 0xFFFF, 0x8001, how do you tell?

It doesn't matter.

The delgation of Pkeys to VMs are on a pkey-table-index basis, so if
it matches table entry 1 and entry 1 is passed to the VM, then the
packet can be passed to the VM.

Jason