On Fri, Nov 11, 2022 at 02:58:49PM +0100, Thomas Gleixner wrote: > Dynamic MSI-X vector allocation post MSI-X allows to allocate vectors at a > given index or at any free index in the available table range. The latter > requires that the core code selects the index at descriptor allocation time. > > This requires that the PCI/MSI-X specific setup of the MSI-X descriptor, > which is partially depending on the chosen index happens after allocation. > > Implement the prepare_desc() op in the PCI/MSI-X specific msi_domain_ops > which is invoked before the core interrupt descriptor and the associated > Linux interrupt number is allocated. That callback is also provided for the > upcoming PCI/IMS implementations so the implementation specific interrupt > domain can do their domain specific initialization of the MSI descriptors. > > Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > --- > drivers/pci/msi/irqdomain.c | 9 +++++++++ > 1 file changed, 9 insertions(+) Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx> Jason
