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iommu/amd: Implement select() method on remapping irqdomain 

Preparatory change to remove irq_remapping_get_irq_domain().

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20201024213535.443185-25-dwmw2@infradead.org
This commit is contained in:
David Woodhouse 2020-10-24 22:35:24 +01:00 committed by Thomas Gleixner
parent 6452ea2a32
commit a1a785b572
1 changed files with 19 additions and 0 deletions
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19
drivers/iommu/amd/iommu.c
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@ -3882,7 +3882,26 @@ static void irq_remapping_deactivate(struct irq_domain *domain,
irte_info->index);
}
static int irq_remapping_select(struct irq_domain *d, struct irq_fwspec *fwspec,
enum irq_domain_bus_token bus_token)
{
struct amd_iommu *iommu;
int devid = -1;
if (x86_fwspec_is_ioapic(fwspec))
devid = get_ioapic_devid(fwspec->param[0]);
else if (x86_fwspec_is_hpet(fwspec))
devid = get_hpet_devid(fwspec->param[0]);
if (devid < 0)
return 0;
iommu = amd_iommu_rlookup_table[devid];
return iommu && iommu->ir_domain == d;
}
static const struct irq_domain_ops amd_ir_domain_ops = {
.select = irq_remapping_select,
.alloc = irq_remapping_alloc,
.free = irq_remapping_free,
.activate = irq_remapping_activate,