How to enable share folders between fvp and host linux

Can you tell me which FVP you are using?   The Base & VE FVPs along with the System Guidance and Reference Design FVPs include a Virtio P9 component.  It implements a subset of the Plan 9 file protocol over a virtio transport. It enables accessing a directory on the host's filesystem within Linux, or another operating system that implements the protocol, running on a platform model.

You can find the documentation of the component here:

developer.arm.com/.../virtio-p9-device-component

Hello I am using the Base_RevC_AEMv8A_pkg. I already checked the document in the fvp guide.

And I have added the -C bp.virtiop9device.root_path=/home/fvptest/work/fvp/share in model-scripts/fvp/run_model.sh

And I have configue the linux with virtio enabled:

    CONFIG_NET_9P=y
    CONFIG_NET_9P_VIRTIO=y
    CONFIG_NET_9P_DEBUG=y (Optional)
    CONFIG_9P_FS=y
    CONFIG_9P_FS_POSIX_ACL=y
    CONFIG_PCI=y
    CONFIG_VIRTIO_PCI=y

    CONFIG_PCI=y
    CONFIG_VIRTIO_PCI=y
    CONFIG_PCI_HOST_GENERIC=y 

And dtsi with linux/arch/arm64/boot/dts/arm$ vi fvp-base.dtsi

 virtio_p9@0140000 {
 compatible = "virtio,mmio";
 reg = <0x0 0x1c140000 0x0 0x1000>;
 interrupts = <0x0 0x2b 0x4>;
 };


And I can see the 9pnet probe success, in fvp linux:

cat /sys/devices/platform/1c140000.virtio_p9/virtio1/mount_tag

got:

FM/sys/devices/platform/1c140000.virtio_p9/virt1




However,when use the command:

mount -t 9p trans=virtio,version=9p2000.L FM /share

It shows that:

mount: mounting FM on /share failed: Inavlid argument

And there is no other message, since I already change the loglevel to 15.

Could you help me for this.

The version is :

Armv8-A Base Platform FVP based on Fast Models 11.8 (Linux):

I can make an example that demonstrates how to enable shared folder based on the Arm Reference Platform (See this page). I will let you know once this is done.

Attached, please find an example. Please follow the README_9p.txt contained in this TGZ. If you have any questions, please feel free to contact me through support-esl@arm.com.

/cfs-file/__key/communityserver-discussions-components-files/80/19.01_5F00_9p.diff.tgz.txt

Awesome, it works, thanks very much.

BTW, why not make this a default config. I think people need it always :)

We will make this change in a future release of the FVP.  Thanks for the suggestion.