[PATCH v3 26/35] iommu/hyper-v: Implement select() method on remapping irqdomain

David Woodhouse
2020-10-24T21:36:29Z

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/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..78a264ad9405 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,
};