In Linux kernel 3.2, the iommu API changed. The following patch, copyright 2011
by Larry Finger and released under an MIT license, allows the VirtualBox module
vboxpci to build:
Index: vboxhost/vboxpci/linux/VBoxPci-linux.c
===================================================================
--- vboxhost.orig/vboxpci/linux/VBoxPci-linux.c
+++ vboxhost/vboxpci/linux/VBoxPci-linux.c
@@ -146,7 +146,11 @@ static int __init VBoxPciLinuxInit(void)
#endif
#ifdef VBOX_WITH_IOMMU
+# if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 2, 0)
+ if (iommu_present(&pci_bus_type))
+#else
if (iommu_found())
+#endif
printk(KERN_INFO "vboxpci: IOMMU found\n");
else
printk(KERN_INFO "vboxpci: IOMMU not found (not registered)\n");
@@ -984,9 +988,15 @@ int vboxPciOsInitVm(PVBOXRAWPCIDRVVM pT
printk(KERN_DEBUG "vboxPciOsInitVm: %p\n", pThis);
#endif
#ifdef VBOX_WITH_IOMMU
+# if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 2, 0)
+ if (iommu_present(&pci_bus_type))
+ {
+ pThis->pIommuDomain = iommu_domain_alloc(&pci_bus_type);
+#else
if (iommu_found())
{
pThis->pIommuDomain = iommu_domain_alloc();
+#endif
if (!pThis->pIommuDomain)
{
printk(KERN_DEBUG "cannot allocate IOMMU domain\n");
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