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

Signed-off-by: David Woodhouse <d...@amazon.co.uk>
---
 drivers/iommu/hyperv-iommu.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/iommu/hyperv-iommu.c b/drivers/iommu/hyperv-iommu.c
index 37dd485a5640..6a8966fbc3bd 100644
--- a/drivers/iommu/hyperv-iommu.c
+++ b/drivers/iommu/hyperv-iommu.c
@@ -61,6 +61,14 @@ static struct irq_chip hyperv_ir_chip = {
        .irq_set_affinity       = hyperv_ir_set_affinity,
 };
 
+static int hyperv_irq_remapping_select(struct irq_domain *d,
+                                      struct irq_fwspec *fwspec,
+                                      enum irq_domain_bus_token bus_token)
+{
+       /* Claim only the first (and only) I/OAPIC */
+       return x86_fwspec_is_ioapic(fwspec) && fwspec->param[0] == 0;
+}
+
 static int hyperv_irq_remapping_alloc(struct irq_domain *domain,
                                     unsigned int virq, unsigned int nr_irqs,
                                     void *arg)
@@ -102,6 +110,7 @@ static void hyperv_irq_remapping_free(struct irq_domain 
*domain,
 }
 
 static const struct irq_domain_ops hyperv_ir_domain_ops = {
+       .select = hyperv_irq_remapping_select,
        .alloc = hyperv_irq_remapping_alloc,
        .free = hyperv_irq_remapping_free,
 };
-- 
2.26.2

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