irqchip: Add IDXD Interrupt Message Store driver
Provide a driver for the Intel IDXD IMS implementation. The implementation
uses a large message store array in device memory.
The IMS domain implementation is minimal and just provides the required
irq_chip callbacks and one domain callback which prepares the MSI
descriptor for easy usage in the irq_chip callbacks.
The necessary iobase is stored in the irqdomain and the PASID which is
required for operation is handed in via msi_instance_cookie in the
allocation function.
Not much to see here. A few lines of code and a filled in template is all
what's needed.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124232327.198240498@linutronix.de
4 files changed
