genirq/msi: Provide new domain id allocation functions

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Provide two sorts of interfaces to handle the different use cases:

  - msi_domain_alloc_irqs_range():

	Handles a caller defined precise range

  - msi_domain_alloc_irqs_all():

	Allocates all interrupts associated to a domain by scanning the
    	allocated MSI descriptors

The latter is useful for the existing PCI/MSI support which does not have
range information available.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124230314.396497163@linutronix.de

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This commit is contained in:

Thomas Gleixner 2022-11-25 00:24:35 +01:00

parent 4cd5f4403f

commit f2480e7dac

2 changed files with 146 additions and 47 deletions

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18

include/linux/msi.h

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177

kernel/irq/msi.c

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