[PATCH v3 25/35] iommu/vt-d: Implement select() method on remapping irqdomain

David Woodhouse
2020-10-24T21:36:28Z

From: David Woodhouse <dwmw@amazon.co.uk>

Preparatory for removing irq_remapping_get_irq_domain()

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
drivers/iommu/intel/irq_remapping.c | 13 +++++++++++++
1 file changed, 13 insertions(+)

diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c
index 96c84b19940e..b3b079c0b51e 100644
--- a/drivers/iommu/intel/irq_remapping.c
+++ b/drivers/iommu/intel/irq_remapping.c
@@ -1431,7 +1431,20 @@ static void intel_irq_remapping_deactivate(struct irq_domain *domain,
modify_irte(&data->irq_2_iommu, &entry);
}

+static int intel_irq_remapping_select(struct irq_domain *d,
+ struct irq_fwspec *fwspec,
+ enum irq_domain_bus_token bus_token)
+{
+ if (x86_fwspec_is_ioapic(fwspec))
+ return d == map_ioapic_to_ir(fwspec->param[0]);
+ else if (x86_fwspec_is_hpet(fwspec))
+ return d == map_hpet_to_ir(fwspec->param[0]);
+
+ return 0;
+}
+
static const struct irq_domain_ops intel_ir_domain_ops = {
+ .select = intel_irq_remapping_select,
.alloc = intel_irq_remapping_alloc,
.free = intel_irq_remapping_free,
.activate = intel_irq_remapping_activate,