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);
+}