2 files changed, 2 insertions, 2 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index b56ee02d2514..f2e1e7fc0ffd 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -294,7 +294,7 @@ and is between 256 and 4096 characters. It is defined in the file
                         Possible values are:
                         isolate - enable device isolation (each device, as far
                                   as possible, will get its own protection
-                                  domain)
+                                  domain) [default]
                         share - put every device behind one IOMMU into the
                                 same protection domain
                         fullflush - enable flushing of IO/TLB entries when
diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 838a2e1d5bb2..595edd2befc6 100644
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -121,7 +121,7 @@ u16 amd_iommu_last_bdf;			/* largest PCI device id we have
 LIST_HEAD(amd_iommu_unity_map);         /* a list of required unity mappings
                                            we find in ACPI */
 unsigned amd_iommu_aperture_order = 26; /* size of aperture in power of 2 */
-int amd_iommu_isolate;                  /* if 1, device isolation is enabled */
+int amd_iommu_isolate = 1;              /* if 1, device isolation is enabled */
 bool amd_iommu_unmap_flush;             /* if true, flush on every unmap */
 
 LIST_HEAD(amd_iommu_list);              /* list of all AMD IOMMUs in the