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From: | Pradeep Kiruvale |
Subject: | Re: [Qemu-arm] [Qemu-devel] 9p as rootfs |
Date: | Wed, 28 Sep 2016 09:16:33 +0200 |
So for some reason kernel expect that 9pfs channel will be named /dev/root (root= seem to be ignored).
Working command line:
Kernel: /root=/dev/root rootfstype=9p rootflags=trans=virtio rw/
Qemu: /-device virtio-9p-device,fsdev=host_fs,mount_tag=/dev/root -fsdev local,id=host_fs,security_mode l=none,path=////work/rootfs/
/
Thanks,
Marcin/
/
W dniu 23.09.2016 o 21:41, mar.krzeminski pisze:
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_mode l=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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