Re: [PATCH] PCI: Allow drivers to claim exclusive access to config regions

[Dan Williams]

On Thu, Mar 25, 2021 at 1:29 AM Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
>
> On Thu, Mar 25, 2021 at 07:54:59AM +0100, Greg Kroah-Hartman wrote:
> > On Wed, Mar 24, 2021 at 06:23:54PM -0700, Dan Williams wrote:
> > > The PCIE Data Object Exchange (DOE) mailbox is a protocol run over
> > > configuration cycles. It assumes one initiator at a time is
> > > reading/writing the data registers.
> >
> > That sounds like a horrible protocol for a multi-processor system.
> > Where is it described and who can we go complain to for creating such a
> > mess?
>
> Indeed.  Dan, is there a way to stilk kill this protocol off before it
> leaks into the wild?

Unfortunately I think that opportunity was more than a year ago, and
there's been a proliferation of derivative protocols building on it
since.