qemu arm linux mmc0: host doesn't support card's voltages 問題

該問題出現在引導linux核心出現mmc 檢測失敗。

解決方法：

在vexpress_defconfig 中添加

CONFIG_REGULATOR=y

CONFIG_REGULATOR_VEXPRESS=y

在核心配置中

General setup --->
[*] open by fhandle syscalls      

Device Drivers  --->
  Generic Driver Options  --->
    [*] Maintain a devtmpfs filesystem to mount at /dev
    [*]   Automount devtmpfs at /dev, after the kernel mounted the rootfs      

Device Drivers ---> Network device support ---> Ethernet driver support --->
[*]   SMC (SMSC)/Western Digital devices
<M>     SMC 91C9x/91C1xxx support
< >     SMSC LAN911[5678] support
<M>     SMSC LAN911x/LAN921x families embedded ethernet support      

qemu arm 環境搭建