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x86/irq: Add allocation type for parent domain retrieval

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irq_remapping_ir_irq_domain() is used to retrieve the remapping parent
domain for an allocation type. irq_remapping_irq_domain() is for retrieving
the actual device domain for allocating interrupts for a device.

The two functions are similar and can be unified by using explicit modes
for parent irq domain retrieval.

Add X86_IRQ_ALLOC_TYPE_IOAPIC/HPET_GET_PARENT and use it in the iommu
implementations. Drop the parent domain retrieval for PCI_MSI/X as that is
unused.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
Link: https://lore.kernel.org/r/20200826112331.436350257@linutronix.de
This commit is contained in:
Thomas Gleixner
2020-08-26 13:16:36 +02:00
parent 801b5e4c4e
commit b4c364da32
6 changed files with 15 additions and 9 deletions
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2
arch/x86/kernel/apic/msi.c
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@@ -472,7 +472,7 @@ struct irq_domain *hpet_create_irq_domain(int hpet_id)
domain_info->data = (void *)(long)hpet_id;
init_irq_alloc_info(&info, NULL);
info.type = X86_IRQ_ALLOC_TYPE_HPET;
info.type = X86_IRQ_ALLOC_TYPE_HPET_GET_PARENT;
info.hpet_id = hpet_id;
parent = irq_remapping_get_ir_irq_domain(&info);
if (parent == NULL)