:: commit 9fed600b1b5adb9aa565a39b2fe1dbc53a4dbfe7

diff --git a/common/protos/linux_x86.c b/common/protos/linux_x86.c
index bb0e72f0..ec5520ce 100644
--- a/common/protos/linux_x86.c
+++ b/common/protos/linux_x86.c
@@ -644,7 +644,9 @@ no_fb:;
     // Spin up
     ///////////////////////////////////////
 
-    iommu_disable_all();
+    // Commented out because Linux shouldn't need it and we don't want to
+    // introduce potential breakages or security weakening.
+    //iommu_disable_all();
 
     irq_flush_type = IRQ_PIC_ONLY_FLUSH;