3 files changed, 16 insertions, 0 deletions

diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index 66008ed80b7a..d8e71459f025 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -91,6 +91,14 @@ struct x86_init_timers {
 };
 
 /**
+ * struct x86_init_iommu - platform specific iommu setup
+ * @iommu_init:                 platform specific iommu setup
+ */
+struct x86_init_iommu {
+        int (*iommu_init)(void);
+};
+
+/**
  * struct x86_init_ops - functions for platform specific setup
  *
  */
@@ -101,6 +109,7 @@ struct x86_init_ops {
         struct x86_init_oem             oem;
         struct x86_init_paging          paging;
         struct x86_init_timers          timers;
+        struct x86_init_iommu           iommu;
 };
 
 /**
diff --git a/arch/x86/kernel/pci-dma.c b/arch/x86/kernel/pci-dma.c
index 839d49a669bc..a13478da533c 100644
--- a/arch/x86/kernel/pci-dma.c
+++ b/arch/x86/kernel/pci-dma.c
@@ -292,6 +292,8 @@ static int __init pci_iommu_init(void)
         dma_debug_add_bus(&pci_bus_type);
 #endif
 
+        x86_init.iommu.iommu_init();
+
         calgary_iommu_init();
 
         intel_iommu_init();
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index bc9b230ef402..c46984d122dc 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -19,6 +19,7 @@
 void __cpuinit x86_init_noop(void) { }
 void __init x86_init_uint_noop(unsigned int unused) { }
 void __init x86_init_pgd_noop(pgd_t *unused) { }
+int __init iommu_init_noop(void) { return 0; }
 
 /*
  * The platform setup functions are preset with the default functions
@@ -63,6 +64,10 @@ struct x86_init_ops x86_init __initdata = {
                 .tsc_pre_init           = x86_init_noop,
                 .timer_init             = hpet_time_init,
         },
+
+        .iommu = {
+                .iommu_init             = iommu_init_noop,
+        },
 };
 
 struct x86_cpuinit_ops x86_cpuinit __cpuinitdata = {