[PATCH v5 24/27] irqchip/gic-v5: Add GICv5 ITS support

[Thomas Gleixner]

On Mon, Jun 23 2025 at 11:26, Lorenzo Pieralisi wrote:
> On Fri, Jun 20, 2025 at 09:18:32PM +0200, Thomas Gleixner wrote:
>> Just add a MSI flag and set it in parent_ops::required_flags and extend
>
> I added that but it does not work (not if we use d->flags as below), it works
> if I add it as an
>
> IRQ_DOMAIN_FLAG_*
>
> and set it in irq_domain_info in the msi_create_parent_irq_domain()
> call in the GICv5 ITS driver when creating the domain.
>
>> the lib with
>> 
>>         struct fwnode_handle *fwh;
>> 
>>         fwh = d->flags & MAGIC ? fwnode_get_parent(fwspec->fwnode) : fwspec->fwnode;
>
> Here we are using the domain flags and I think that's what we want.
>
> If I go with parent_ops flag, I believe here we need to use the parent
> msi_domain_info::flags - I don't think that's what we want.
>
> It is a property of the IRQ domain so I think that adding an
>
> IRQ_DOMAIN_FLAG_FWNODE_PARENT
>
> is the best option.
>
> Please let me know.

Obviously. Doh :)