RE: [patch V2 19/33] genirq/msi: Provide msi_desc::msi_data

Thomas Gleixner
2022-11-23T11:41:40Z

On Wed, Nov 23 2022 at 08:27, Kevin Tian wrote:

>> From: Thomas Gleixner <tglx@linutronix.de>
>> Sent: Monday, November 21, 2022 10:38 PM
>>
>> The upcoming support for PCI/IMS requires to store some information
>> related
>> to the message handling in the MSI descriptor, e.g. PASID or a pointer to a
>> queue.
>>
>> Provide a generic storage struct which maps over the existing PCI specific
>> storage which means the size of struct msi_desc is not getting bigger.
>>
>> It contains a iomem pointer for device memory based IMS and a union of a
>> u64 and a void pointer which allows the device specific IMS implementations
>> to store the necessary information.
>
> stale comment.
>
>>
>> The iomem pointer is set up by the domain allocation functions.
>>
>> The data union msi_dev_cookie is going to be handed in when allocating an
>
> no msi_dev_cookie now.

Ooops.