Hi folks, once again I need your help.
On my cubietruck I installed jessie on microSD card. My first goal is to get a VM running with kvm-arm and CPU based hw virtualization started by qemu (for testing), later then started and administrated by virsh. Having installed the host system as described here https://www.debian.org/releases/jessie/armhf/ch05s01.html.en #5.1.5 I installed qemu and libvirt-bin virtinst virt-top bridge-utils afterwards. Also I checked some dmesg output to verify the virtualization options of the CPU are ready for use and kvm-arm is available: dmesg |grep SMP SMP: Total of 2 processors activated (96.00 BogoMIPS). dmesg |grep CPU CPU: All CPU(s) started in HYP mode. CPU: Virtualization extensions available. dmesg |grep kvm kvm [1]: interrupt-controller@1c84000 IRQ25 kvm [1]: timer IRQ27 kvm [1]: Hyp mode initialized successfully I build a jessie bootstrap and put it into an *.img files so qemu can use it. As hw to virtualize by qemu I choose a Versatile Express A15 board. I have a special dtb file and Kernel built with General setup -> Configure standard kernel features (expert users) General setup -> open by fhandle syscalls Enable the block layer -> Support for large (2TB+) block devices and files for this VM. After I started the system by command qemu-system-arm -enable-kvm -smp 1 -m 256 -M vexpress-a15 -cpu host -kernel /home/guido/kvm-arm/jessie/vexpress-zImage -dtb /home/guido/kvm-arm/jessie/vexpress-v2p-ca15-tc1.dtb -append "root=/dev/vda console=ttyAMA0 rootwait" -drive if=none,file=/home/guido/kvm-arm/jessie/jessie-arm.img,id=factory -device virtio-blk-device,drive=factory -net nic,macaddr=02:fd:01:de:ad:34 -net tap -monitor null -serial stdio -nographic the VM starts and I'm aible to login. Sadly, device jessie-arm.img i.e. /dev/vda is allways mounted read-only. After loging into the VM I can mount it read/write. But this no solution. I want the machine booting with the device in read/write mode, because already during the boot process some deamons try to write to it. Just for testing I tried the same with a standard open suse image: qemu-system-arm -enable-kvm -smp 1 -m 256 -M vexpress-a15 -cpu host -kernel /home/guido/kvm-arm/opensuse/vexpress-zImage -dtb /home/guido/kvm-arm/opensuse/vexpress-v2p-ca15-tc1.dtb -append "root=/dev/vda console=ttyAMA0 rootwait" -drive if=none,file=/home/guido/kvm-arm/opensuse/opensuse- factory.img, id=factory -device virtio-blk-device,drive=factory -net nic, macaddr=02:fd:01:de:ad:34-net tap -monitor null -serial stdio -nographic The result is the same, booting fine but with /dev/sda in read-only mode. Any idea(s) what's going wrong? Many thanks in advance, Guido
