RE: [patch V3 28/33] PCI/MSI: Provide IMS (Interrupt Message Store) support

[Tian, Kevin]

> From: Bjorn Helgaas <helgaas@xxxxxxxxxx>
> Sent: Thursday, March 28, 2024 12:33 AM
> 
> On Fri, Nov 25, 2022 at 12:26:29AM +0100, Thomas Gleixner wrote:
> > IMS (Interrupt Message Store) is a new specification which allows
> > implementation specific storage of MSI messages contrary to the
> > strict standard specified MSI and MSI-X message stores.
> > ...
> 
> > + * pci_create_ims_domain - Create a secondary IMS domain for a PCI
> device
> 
> > + * Return: True on success, false otherwise
> 
> > +bool pci_create_ims_domain(struct pci_dev *pdev, const struct
> msi_domain_template *template,
> > +			   unsigned int hwsize, void *data)
> 
> pci_create_ims_domain() is exported for use by modules, but AFAICT,
> there is no in-tree user of this yet.
> 
> I assume one is coming, but if there isn't one on the near horizon,
> we could/should remove this for now.
> 

There won't be one in the near term. So I agree it's a good idea to
remove it. Anyway this can be easily added back when the real
user comes.