1 files changed, 164 insertions, 0 deletions
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
new file mode 100644
index 000000000000..1cf350e02da8
--- /dev/null
+++ b/drivers/iommu/irq_remapping.c
@@ -0,0 +1,164 @@
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+
+#include "irq_remapping.h"
+
+int irq_remapping_enabled;
+
+int disable_irq_remap;
+int disable_sourceid_checking;
+int no_x2apic_optout;
+
+static struct irq_remap_ops *remap_ops;
+
+static __init int setup_nointremap(char *str)
+{
+	disable_irq_remap = 1;
+	return 0;
+}
+early_param("nointremap", setup_nointremap);
+
+static __init int setup_irqremap(char *str)
+{
+	if (!str)
+		return -EINVAL;
+
+	while (*str) {
+		if (!strncmp(str, "on", 2))
+			disable_irq_remap = 0;
+		else if (!strncmp(str, "off", 3))
+			disable_irq_remap = 1;
+		else if (!strncmp(str, "nosid", 5))
+			disable_sourceid_checking = 1;
+		else if (!strncmp(str, "no_x2apic_optout", 16))
+			no_x2apic_optout = 1;
+
+		str += strcspn(str, ",");
+		while (*str == ',')
+			str++;
+	}
+
+	return 0;
+}
+early_param("intremap", setup_irqremap);
+
+void __init setup_irq_remapping_ops(void)
+{
+	remap_ops = &intel_irq_remap_ops;
+}
+
+int irq_remapping_supported(void)
+{
+	if (disable_irq_remap)
+		return 0;
+
+	if (!remap_ops || !remap_ops->supported)
+		return 0;
+
+	return remap_ops->supported();
+}
+
+int __init irq_remapping_prepare(void)
+{
+	if (!remap_ops || !remap_ops->prepare)
+		return -ENODEV;
+
+	return remap_ops->prepare();
+}
+
+int __init irq_remapping_enable(void)
+{
+	if (!remap_ops || !remap_ops->enable)
+		return -ENODEV;
+
+	return remap_ops->enable();
+}
+
+void irq_remapping_disable(void)
+{
+	if (!remap_ops || !remap_ops->disable)
+		return;
+
+	remap_ops->disable();
+}
+
+int irq_remapping_reenable(int mode)
+{
+	if (!remap_ops || !remap_ops->reenable)
+		return 0;
+
+	return remap_ops->reenable(mode);
+}
+
+int __init irq_remap_enable_fault_handling(void)
+{
+	if (!remap_ops || !remap_ops->enable_faulting)
+		return -ENODEV;
+
+	return remap_ops->enable_faulting();
+}
+
+int setup_ioapic_remapped_entry(int irq,
+				struct IO_APIC_route_entry *entry,
+				unsigned int destination, int vector,
+				struct io_apic_irq_attr *attr)
+{
+	if (!remap_ops || !remap_ops->setup_ioapic_entry)
+		return -ENODEV;
+
+	return remap_ops->setup_ioapic_entry(irq, entry, destination,
+					     vector, attr);
+}
+
+int set_remapped_irq_affinity(struct irq_data *data, const struct cpumask *mask,
+			      bool force)
+{
+	if (!remap_ops || !remap_ops->set_affinity)
+		return 0;
+
+	return remap_ops->set_affinity(data, mask, force);
+}
+
+void free_remapped_irq(int irq)
+{
+	if (!remap_ops || !remap_ops->free_irq)
+		return;
+
+	remap_ops->free_irq(irq);
+}
+
+void compose_remapped_msi_msg(struct pci_dev *pdev,
+			      unsigned int irq, unsigned int dest,
+			      struct msi_msg *msg, u8 hpet_id)
+{
+	if (!remap_ops || !remap_ops->compose_msi_msg)
+		return;
+
+	remap_ops->compose_msi_msg(pdev, irq, dest, msg, hpet_id);
+}
+
+int msi_alloc_remapped_irq(struct pci_dev *pdev, int irq, int nvec)
+{
+	if (!remap_ops || !remap_ops->msi_alloc_irq)
+		return -ENODEV;
+
+	return remap_ops->msi_alloc_irq(pdev, irq, nvec);
+}
+
+int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
+			   int index, int sub_handle)
+{
+	if (!remap_ops || !remap_ops->msi_setup_irq)
+		return -ENODEV;
+
+	return remap_ops->msi_setup_irq(pdev, irq, index, sub_handle);
+}
+
+int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
+{
+	if (!remap_ops || !remap_ops->setup_hpet_msi)
+		return -ENODEV;
+
+	return remap_ops->setup_hpet_msi(irq, id);
+}