Re: [PATCH V7 03/10] PCI: Create PCI library functions in support of DOE mailboxes.

[Christoph Hellwig]

On Wed, Mar 30, 2022 at 04:59:13PM -0700, ira.weiny@xxxxxxxxx wrote:
> From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
> 
> Introduced in a PCI v6.0[1], DOE provides a config space based mailbox
> with standard protocol discovery.  Each mailbox is accessed through a
> DOE Extended Capability.
> 
> Each DOE mailbox must support the DOE discovery protocol in addition to
> any number of additional protocols.
> 
> Define core PCI functionality to manage a single PCI DOE mailbox at a
> defined config space offset.  Functionality includes creating, supported
> protocol queries, submit tasks to, and destroying the new state objects.
> 
> If interrupts are desired, interrupts vectors should be allocated prior
> to asking for irq's when creating a mailbox object.

I really don't think this should be built unconditionally and bloat
every single kernel built with PCI support.