7 files changed, 7 insertions, 7 deletions

diff --git a/meta/conf/machine/qemuarm.conf b/meta/conf/machine/qemuarm.conf
index 17402ef3b3..f9d6dd7e36 100644
--- a/meta/conf/machine/qemuarm.conf
+++ b/meta/conf/machine/qemuarm.conf
@@ -8,7 +8,7 @@ require conf/machine/include/tune-arm926ejs.inc
 
 KERNEL_IMAGETYPE = "zImage"
 
-SERIAL_CONSOLES = "115200;ttyAMA0 115200;ttyAMA1"
+SERIAL_CONSOLES ?= "115200;ttyAMA0 115200;ttyAMA1"
 
 # For runqemu
 QB_SYSTEM_NAME = "qemu-system-arm"
diff --git a/meta/conf/machine/qemuarm64.conf b/meta/conf/machine/qemuarm64.conf
index df2010cb85..e70538aac6 100644
--- a/meta/conf/machine/qemuarm64.conf
+++ b/meta/conf/machine/qemuarm64.conf
@@ -7,7 +7,7 @@ require conf/machine/include/qemu.inc
 
 KERNEL_IMAGETYPE = "Image"
 
-SERIAL_CONSOLES = "38400;ttyAMA0 38400;hvc0"
+SERIAL_CONSOLES ?= "38400;ttyAMA0 38400;hvc0"
 
 # For runqemu
 QB_SYSTEM_NAME = "qemu-system-aarch64"
diff --git a/meta/conf/machine/qemumips.conf b/meta/conf/machine/qemumips.conf
index 3182ea1b54..986315a64a 100644
--- a/meta/conf/machine/qemumips.conf
+++ b/meta/conf/machine/qemumips.conf
@@ -9,6 +9,6 @@ require conf/machine/include/qemuboot-mips.inc
 KERNEL_IMAGETYPE = "vmlinux"
 KERNEL_ALT_IMAGETYPE = "vmlinux.bin"
 
-SERIAL_CONSOLES = "115200;ttyS0 115200;ttyS1"
+SERIAL_CONSOLES ?= "115200;ttyS0 115200;ttyS1"
 
 MACHINE_EXTRA_RRECOMMENDS = " kernel-modules"
diff --git a/meta/conf/machine/qemumips64.conf b/meta/conf/machine/qemumips64.conf
index 9529f4c4f3..3f91cbe177 100644
--- a/meta/conf/machine/qemumips64.conf
+++ b/meta/conf/machine/qemumips64.conf
@@ -9,6 +9,6 @@ require conf/machine/include/qemuboot-mips.inc
 KERNEL_IMAGETYPE = "vmlinux"
 KERNEL_ALT_IMAGETYPE = "vmlinux.bin"
 
-SERIAL_CONSOLES = "115200;ttyS0 115200;ttyS1"
+SERIAL_CONSOLES ?= "115200;ttyS0 115200;ttyS1"
 
 MACHINE_EXTRA_RRECOMMENDS = " kernel-modules"
diff --git a/meta/conf/machine/qemuppc.conf b/meta/conf/machine/qemuppc.conf
index 8703c2086a..9d174bc439 100644
--- a/meta/conf/machine/qemuppc.conf
+++ b/meta/conf/machine/qemuppc.conf
@@ -9,7 +9,7 @@ TARGET_CC_KERNEL_ARCH = "-mno-spe"
 
 KERNEL_IMAGETYPE = "vmlinux"
 
-SERIAL_CONSOLES = "115200;ttyS0 115200;ttyS1"
+SERIAL_CONSOLES ?= "115200;ttyS0 115200;ttyS1"
 
 # For runqemu
 QB_SYSTEM_NAME = "qemu-system-ppc"
diff --git a/meta/conf/machine/qemux86-64.conf b/meta/conf/machine/qemux86-64.conf
index 3117ca1a5b..150d745436 100644
--- a/meta/conf/machine/qemux86-64.conf
+++ b/meta/conf/machine/qemux86-64.conf
@@ -14,7 +14,7 @@ require conf/machine/include/qemuboot-x86.inc
 
 KERNEL_IMAGETYPE = "bzImage"
 
-SERIAL_CONSOLES = "115200;ttyS0 115200;ttyS1"
+SERIAL_CONSOLES ?= "115200;ttyS0 115200;ttyS1"
 
 XSERVER = "xserver-xorg \
            ${@bb.utils.contains('DISTRO_FEATURES', 'opengl', 'mesa-driver-swrast xserver-xorg-extension-glx', '', d)} \
diff --git a/meta/conf/machine/qemux86.conf b/meta/conf/machine/qemux86.conf
index 77859994c9..8997f6ba70 100644
--- a/meta/conf/machine/qemux86.conf
+++ b/meta/conf/machine/qemux86.conf
@@ -13,7 +13,7 @@ require conf/machine/include/qemuboot-x86.inc
 
 KERNEL_IMAGETYPE = "bzImage"
 
-SERIAL_CONSOLES = "115200;ttyS0 115200;ttyS1"
+SERIAL_CONSOLES ?= "115200;ttyS0 115200;ttyS1"
 
 XSERVER = "xserver-xorg \
            ${@bb.utils.contains('DISTRO_FEATURES', 'opengl', 'mesa-driver-swrast xserver-xorg-extension-glx', '', d)} \