On Sat, 17 Jun 2023 at 17:29, Guenter Roeck <li...@roeck-us.net> wrote: > > Hi, > > On Tue, May 23, 2023 at 06:04:58PM +0800, qianfangui...@163.com wrote: > > From: qianfan Zhao <qianfangui...@163.com> > > > > Allwinner R40 (sun8i) SoC features a Quad-Core Cortex-A7 ARM CPU, > > and a Mali400 MP2 GPU from ARM. It's also known as the Allwinner T3 > > for In-Car Entertainment usage, A40i and A40pro are variants that > > differ in applicable temperatures range (industrial and military). > > > > Signed-off-by: qianfan Zhao <qianfangui...@163.com> > > Reviewed-by: Niek Linnenbank <nieklinnenb...@gmail.com> > > I tried this in mainline linux with the following command. > > qemu-system-arm -M bpim2u \ > -kernel arch/arm/boot/zImage -no-reboot \ > -snapshot -drive file=rootfs-armv7a.ext2,format=raw,if=sd \ > -nic user \ > --append "root=/dev/mmcblk0 rootwait console=ttyS0,115200" \ > -dtb arch/arm/boot/dts/sun8i-r40-bananapi-m2-ultra.dtb \ > -nographic -monitor null -serial stdio > > Main problem is that the SD card gets instantiated randomly to > mmc0, mmc1, or mmc2, making it all but impossible to specify a > root file system device. The non-instantiated cards are always > reported as non-removable, including mmc0. Example: > > mmc0: Failed to initialize a non-removable card
Do you mean that QEMU randomly connects the SD card to a different MMC controller each time, or that Linux is randomly assigning mmc0 to a different MMC controller each time ? thanks -- PMM
