[tip: x86/apic] iommu/hyper-v: Implement select() method on remapping irqdomain

[tip-bot2 for David Woodhouse]

The following commit has been merged into the x86/apic branch of tip:

Commit-ID:     a491bb19f728cdb8cc1f4734ecc57c0afa099fac
Gitweb:        https://git.kernel.org/tip/a491bb19f728cdb8cc1f4734ecc57c0afa099fac
Author:        David Woodhouse <dwmw@xxxxxxxxxxxx>
AuthorDate:    Sat, 24 Oct 2020 22:35:26 +01:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Wed, 28 Oct 2020 20:26:28 +01:00

iommu/hyper-v: Implement select() method on remapping irqdomain

Preparatory for removing irq_remapping_get_irq_domain()

Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20201024213535.443185-27-dwmw2@xxxxxxxxxxxxx

---
 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 37dd485..78a264a 100644
--- a/drivers/iommu/hyperv-iommu.c
+++ b/drivers/iommu/hyperv-iommu.c
@@ -101,7 +101,16 @@ static void hyperv_irq_remapping_free(struct irq_domain *domain,
 	irq_domain_free_irqs_common(domain, virq, nr_irqs);
 }
 
+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 const struct irq_domain_ops hyperv_ir_domain_ops = {
+	.select = hyperv_irq_remapping_select,
 	.alloc = hyperv_irq_remapping_alloc,
 	.free = hyperv_irq_remapping_free,
 };