Re: [PATCH V2 00/23] IOREQ feature (+ virtio-mmio) on Arm

[Oleksandr Tyshchenko <olekstysh@xxxxxxxxx>]

Hi Stefano

[sorry for the possible format issue]

On Thu, Oct 29, 2020 at 9:53 PM Stefano Stabellini <sstabellini@xxxxxxxxxx> wrote:

On Thu, 29 Oct 2020, Oleksandr Tyshchenko wrote:
> On Thu, Oct 29, 2020 at 9:42 AM Masami Hiramatsu <masami.hiramatsu@xxxxxxxxxx> wrote:
>       Hi Oleksandr,
>
> Hi Masami
>
> [sorry for the possible format issue]
>  
>
>       I would like to try this on my arm64 board.
>
> Glad to hear you are interested in this topic. 
>  
>
>       According to your comments in the patch, I made this config file.
>       # cat debian.conf
>       name = "debian"
>       type = "pvh"
>       vcpus = 8
>       memory = 512
>       kernel = "/opt/agl/vmlinuz-5.9.0-1-arm64"
>       ramdisk = "/opt/agl/initrd.img-5.9.0-1-arm64"
>       cmdline= "console=hvc0 earlyprintk=xen root=/dev/xvda1 rw"
>       disk = [ '/opt/agl/debian.qcow2,qcow2,hda' ]
>       vif = [ 'mac=00:16:3E:74:3d:76,bridge=xenbr0' ]
>       virtio = 1
>       vdisk = [ 'backend=Dom0, disks=ro:/dev/sda1' ]
>
>       And tried to boot a DomU, but I got below error.
>
>       # xl create -c debian.conf
>       Parsing config from debian.conf
>       libxl: error: libxl_create.c:1863:domcreate_attach_devices: Domain
>       1:unable to add virtio_disk devices
>       libxl: error: libxl_domain.c:1218:destroy_domid_pci_done: Domain
>       1:xc_domain_pause failed
>       libxl: error: libxl_dom.c:39:libxl__domain_type: unable to get domain
>       type for domid=1
>       libxl: error: libxl_domain.c:1136:domain_destroy_callback: Domain
>       1:Unable to destroy guest
>       libxl: error: libxl_domain.c:1063:domain_destroy_cb: Domain
>       1:Destruction of domain failed
>
>
>       Could you tell me how can I test it?
>
>
> I assume it is due to the lack of the virtio-disk backend (which I haven't shared yet as I focused on the IOREQ/DM support on Arm in the
> first place).
> Could you wait a little bit, I am going to share it soon. 

Do you have a quick-and-dirty hack you can share in the meantime? Even
just on github as a special branch? It would be very useful to be able
to have a test-driver for the new feature.

Well, I will provide a branch on github with our PoC virtio-disk backend by the end of this week. It will be possible to test this series with it. 

--

Regards,

Oleksandr Tyshchenko