diff --git a/board/qemu/sh4-r2d/linux.config b/board/qemu/sh4-r2d/linux.config
index a3d6544549..dd4bf5204f 100644
--- a/board/qemu/sh4-r2d/linux.config
+++ b/board/qemu/sh4-r2d/linux.config
@@ -5,6 +5,7 @@ CONFIG_MEMORY_START=0x0c000000
 CONFIG_FLATMEM_MANUAL=y
 CONFIG_SH_RTS7751R2D=y
 CONFIG_RTS7751R2D_PLUS=y
+CONFIG_CMDLINE_FROM_BOOTLOADER=y
 CONFIG_HEARTBEAT=y
 CONFIG_PCI=y
 CONFIG_NET=y
diff --git a/board/qemu/sh4-r2d/readme.txt b/board/qemu/sh4-r2d/readme.txt
index 24c3676d8a..b0799e47a8 100644
--- a/board/qemu/sh4-r2d/readme.txt
+++ b/board/qemu/sh4-r2d/readme.txt
@@ -1,6 +1,6 @@
 Run the emulation with:
 
-  qemu-system-sh4 -M r2d -kernel output/images/zImage -append "console=ttySC1,115200 noiotrap" -serial null -serial stdio -net nic,model=rtl8139 -net user # qemu_sh4_r2d_defconfig
+  qemu-system-sh4 -M r2d -kernel output/images/zImage -drive file=output/images/rootfs.ext2,if=ide,format=raw -append "rootwait root=/dev/sda console=ttySC1,115200 noiotrap" -serial null -serial stdio -net nic,model=rtl8139 -net user # qemu_sh4_r2d_defconfig
 
 The login prompt will appear in the terminal that started Qemu.
 The graphical window is the framebuffer.
diff --git a/board/qemu/sh4eb-r2d/linux.config b/board/qemu/sh4eb-r2d/linux.config
index 6ead626c41..5f94bee77d 100644
--- a/board/qemu/sh4eb-r2d/linux.config
+++ b/board/qemu/sh4eb-r2d/linux.config
@@ -6,6 +6,7 @@ CONFIG_FLATMEM_MANUAL=y
 CONFIG_CPU_BIG_ENDIAN=y
 CONFIG_SH_RTS7751R2D=y
 CONFIG_RTS7751R2D_PLUS=y
+CONFIG_CMDLINE_FROM_BOOTLOADER=y
 CONFIG_HEARTBEAT=y
 CONFIG_PCI=y
 CONFIG_NET=y
diff --git a/board/qemu/sh4eb-r2d/readme.txt b/board/qemu/sh4eb-r2d/readme.txt
index 577c54cd9d..9f3dd8b20b 100644
--- a/board/qemu/sh4eb-r2d/readme.txt
+++ b/board/qemu/sh4eb-r2d/readme.txt
@@ -1,6 +1,6 @@
 Run the emulation with:
 
-  qemu-system-sh4eb -M r2d -kernel output/images/zImage -append "console=ttySC1,115200 noiotrap" -serial null -serial stdio -net nic,model=rtl8139 -net user # qemu_sh4eb_r2d_defconfig
+  qemu-system-sh4eb -M r2d -kernel output/images/zImage -drive file=output/images/rootfs.ext2,if=ide,format=raw -append "rootwait root=/dev/sda console=ttySC1,115200 noiotrap" -serial null -serial stdio -net nic,model=rtl8139 -net user # qemu_sh4eb_r2d_defconfig
 
 The login prompt will appear in the terminal that started Qemu.
 The graphical window is the framebuffer.
diff --git a/configs/qemu_sh4_r2d_defconfig b/configs/qemu_sh4_r2d_defconfig
index 63b9fa1b29..628ca05543 100644
--- a/configs/qemu_sh4_r2d_defconfig
+++ b/configs/qemu_sh4_r2d_defconfig
@@ -12,7 +12,7 @@ BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.12.27"
 BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/sh4-r2d/linux.config"
 BR2_LINUX_KERNEL_ZIMAGE=y
-BR2_TARGET_ROOTFS_INITRAMFS=y
+BR2_TARGET_ROOTFS_EXT2=y
 # BR2_TARGET_ROOTFS_TAR is not set
 BR2_PACKAGE_HOST_QEMU=y
 BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE=y
diff --git a/configs/qemu_sh4eb_r2d_defconfig b/configs/qemu_sh4eb_r2d_defconfig
index 97cbd6bd8a..4fd07775ed 100644
--- a/configs/qemu_sh4eb_r2d_defconfig
+++ b/configs/qemu_sh4eb_r2d_defconfig
@@ -12,7 +12,7 @@ BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.12.27"
 BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
 BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/sh4eb-r2d/linux.config"
 BR2_LINUX_KERNEL_ZIMAGE=y
-BR2_TARGET_ROOTFS_INITRAMFS=y
+BR2_TARGET_ROOTFS_EXT2=y
 # BR2_TARGET_ROOTFS_TAR is not set
 BR2_PACKAGE_HOST_QEMU=y
 BR2_PACKAGE_HOST_QEMU_SYSTEM_MODE=y