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Re: [Qemu-devel] 9p as rootfs


From: mar.krzeminski
Subject: Re: [Qemu-devel] 9p as rootfs
Date: Fri, 23 Sep 2016 21:41:35 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.3.0

And most important, while mounting as roots, error is:

[    1.086235] device: '9p-1': device_add
[    1.087859] 9pnet_virtio: no channels available
[    1.091619] device: '9p-1': device_unregister
[    1.092783] device: '9p-1': device_create_release
[ 1.093534] VFS: Cannot open root device "host" or unknown-block(0,0): error -2

Thanks,
Marcin

W dniu 23.09.2016 o 21:38, mar.krzeminski pisze:
Hello,

I have a problem in my custom arm machine to use 9p fs as a rootfs.

9p command line i qemu:

/-device virtio-9p-device,fsdev=host_fs,mount_tag=hostfs -fsdev local,id=host_fs,security_model=none,path=/work/rootfs/

Kernel cmd line:

/--append "root=hostfs rootfstype=9p rootflags=trans=virtio noinitrd console=ttyS3,115200"

/Device tree entry:

/        virtio: address@hidden {//
//            compatible = "virtio,mmio";//
//            reg = <0xff0a4000 0x200>;//
//            interrupts = <0 72 1>;//
//            status = "okay";//
//        };


/ I can mount this fs from kernel using fstab entry:
/hostfs               /mnt/host            9p trans=virtio          0  0

/Do you have any idea what am I doing wrong?

Thanks,
Marcin/
/



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