diff --git a/hypervisor/arch/x86/configs/apl-mrb/misc_cfg.h b/hypervisor/arch/x86/configs/apl-mrb/misc_cfg.h
index 008252422..5dbe607af 100644
--- a/hypervisor/arch/x86/configs/apl-mrb/misc_cfg.h
+++ b/hypervisor/arch/x86/configs/apl-mrb/misc_cfg.h
@@ -19,6 +19,7 @@
 
 #ifndef CONFIG_RELEASE
 #define BOOTARG_DEBUG		"hvlog=2M@0x6de00000 "	\
+				"memmap=0x200000$0x6de00000 "	\
 				"memmap=0x400000$0x6da00000 "	\
 				"ramoops.mem_address=0x6da00000 "	\
 				"ramoops.mem_size=0x400000 "	\
diff --git a/hypervisor/arch/x86/configs/apl-up2/misc_cfg.h b/hypervisor/arch/x86/configs/apl-up2/misc_cfg.h
index dee3505e4..0b2bca85a 100644
--- a/hypervisor/arch/x86/configs/apl-up2/misc_cfg.h
+++ b/hypervisor/arch/x86/configs/apl-up2/misc_cfg.h
@@ -18,9 +18,10 @@
 #define SOS_COM2_IRQ		3U
 
 #ifndef CONFIG_RELEASE
-#define BOOTARG_DEBUG		"hvlog=2M@0x6de00000 "	\
-				"memmap=0x400000$0x6da00000 "	\
-				"ramoops.mem_address=0x6da00000 "	\
+#define BOOTARG_DEBUG		"hvlog=2M@0x5de00000 "	\
+				"memmap=0x200000$0x5de00000 "	\
+				"memmap=0x400000$0x5da00000 "	\
+				"ramoops.mem_address=0x5da00000 "	\
 				"ramoops.mem_size=0x400000 "	\
 				"ramoops.console_size=0x200000 "	\
 				"reboot_panic=p,w "
diff --git a/hypervisor/arch/x86/configs/dnv-cb2/misc_cfg.h b/hypervisor/arch/x86/configs/dnv-cb2/misc_cfg.h
index 09fa89b6d..3c8cb12da 100644
--- a/hypervisor/arch/x86/configs/dnv-cb2/misc_cfg.h
+++ b/hypervisor/arch/x86/configs/dnv-cb2/misc_cfg.h
@@ -17,7 +17,8 @@
 #define SOS_COM2_IRQ		3U
 
 #ifndef CONFIG_RELEASE
-#define SOS_BOOTARGS_DIFF	"hvlog=2M@0x1FE00000"
+#define SOS_BOOTARGS_DIFF	"hvlog=2M@0x1FE00000 "	\
+				"memmap=0x200000$0x1fe00000 "
 #else
 #define SOS_BOOTARGS_DIFF	""
 #endif
diff --git a/hypervisor/arch/x86/configs/generic/misc_cfg.h b/hypervisor/arch/x86/configs/generic/misc_cfg.h
index 437ec0b81..f0e8ff1d4 100644
--- a/hypervisor/arch/x86/configs/generic/misc_cfg.h
+++ b/hypervisor/arch/x86/configs/generic/misc_cfg.h
@@ -18,7 +18,8 @@
 #define SOS_COM2_IRQ		3U
 
 #ifndef CONFIG_RELEASE
-#define SOS_BOOTARGS_DIFF	"hvlog=2M@0x1FE00000"
+#define SOS_BOOTARGS_DIFF	"hvlog=2M@0x1FE00000 "	\
+				"memmap=0x200000$0x1fe00000 "
 #else
 #define SOS_BOOTARGS_DIFF	""
 #endif
diff --git a/hypervisor/arch/x86/configs/nuc6cayh.config b/hypervisor/arch/x86/configs/nuc6cayh.config
index 2e6bd73f0..147e9ecea 100644
--- a/hypervisor/arch/x86/configs/nuc6cayh.config
+++ b/hypervisor/arch/x86/configs/nuc6cayh.config
@@ -4,4 +4,4 @@ CONFIG_BOARD="nuc6cayh"
 # enable HSUART at PCI 0:18.0 by soldering Tx/Rx wires from M.2 connector;
 CONFIG_SERIAL_PCI=y
 CONFIG_SERIAL_PCI_BDF="0:18.0"
-CONFIG_HV_RAM_START=0x12200000
+CONFIG_HV_RAM_START=0x20000000
diff --git a/hypervisor/arch/x86/configs/nuc6cayh/misc_cfg.h b/hypervisor/arch/x86/configs/nuc6cayh/misc_cfg.h
index 09fa89b6d..3c8cb12da 100644
--- a/hypervisor/arch/x86/configs/nuc6cayh/misc_cfg.h
+++ b/hypervisor/arch/x86/configs/nuc6cayh/misc_cfg.h
@@ -17,7 +17,8 @@
 #define SOS_COM2_IRQ		3U
 
 #ifndef CONFIG_RELEASE
-#define SOS_BOOTARGS_DIFF	"hvlog=2M@0x1FE00000"
+#define SOS_BOOTARGS_DIFF	"hvlog=2M@0x1FE00000 "	\
+				"memmap=0x200000$0x1fe00000 "
 #else
 #define SOS_BOOTARGS_DIFF	""
 #endif
diff --git a/hypervisor/arch/x86/configs/nuc7i7dnb/misc_cfg.h b/hypervisor/arch/x86/configs/nuc7i7dnb/misc_cfg.h
index 63ffbf941..44260c5a0 100644
--- a/hypervisor/arch/x86/configs/nuc7i7dnb/misc_cfg.h
+++ b/hypervisor/arch/x86/configs/nuc7i7dnb/misc_cfg.h
@@ -18,7 +18,8 @@
 #define SOS_COM2_IRQ		3U
 
 #ifndef CONFIG_RELEASE
-#define SOS_BOOTARGS_DIFF	"hvlog=2M@0x1FE00000"
+#define SOS_BOOTARGS_DIFF	"hvlog=2M@0x1FE00000 "	\
+				"memmap=0x200000$0x1fe00000 "
 #else
 #define SOS_BOOTARGS_DIFF	""
 #endif