diff --git a/target/linux/x86/generic/config-default b/target/linux/x86/generic/config-default
index 9bfdf46ed..618fe1dfb 100644
--- a/target/linux/x86/generic/config-default
+++ b/target/linux/x86/generic/config-default
@@ -1,2 +1,6 @@
+CONFIG_ILLEGAL_POINTER_VALUE=0
+CONFIG_K8_NB=y
 CONFIG_PATA_LEGACY=y
 CONFIG_PATA_PLATFORM=y
+CONFIG_PCIEAER=y
+CONFIG_PCIEPORTBUS=y
diff --git a/target/linux/x86/olpc/config-default b/target/linux/x86/olpc/config-default
index e5440f5e6..368ae8863 100644
--- a/target/linux/x86/olpc/config-default
+++ b/target/linux/x86/olpc/config-default
@@ -107,6 +107,7 @@ CONFIG_OPROFILE=y
 # CONFIG_PCI_GOANY is not set
 CONFIG_PCI_GOOLPC=y
 CONFIG_PCI_OLPC=y
+# CONFIG_PCIEPORTBUS is not set
 CONFIG_PERF_COUNTERS=y
 CONFIG_PM_DEBUG=y
 CONFIG_PM_SLEEP=y