[PATCH v3 24/35] iommu/amd: Implement select() method on remapping irqdomain

David Woodhouse
2020-10-24T21:36:11Z

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

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>
---
drivers/iommu/amd/iommu.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 9744cdbefd88..31b22244e9c2 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -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,