[OE-core] qemu needs target kernel sets CONFIG_SCSI_VIRTIO=y to boot vmdk qcow2 and vdi

[Bruce Ashfield]

On Thu, Feb 25, 2016 at 5:36 AM, Robert Yang <liezhi.yang at windriver.com>
wrote:

> Hi Bruce and Darren,
>
> We need enable target kernel's CONFIG_SCSI_VIRTIO=y to make native qemu
> can boot hdddirect, vmdk, qcow2 and vdi, otherwise, the scsi drive can't
> work in qemu since our vm image's root default to /dev/sda2, or we can
> change it default to /dev/hda2, then we don't have to make any changes
> on kernel, but I prefer scsi since ide is going to be out of date.
>

The IDE fragment was on for compatibility reasons, but we dropped that
compatibility about a year ago. I was under the impression that we had
fully dropped all the IDE fragments.


>
> I've tried to enable it by menuconfig, it works well, would you please
> enable it by default ?
>


Send a patch to the linux-yocto mailing list to change the virtio
configuration
fragment.

You are already set up to test it out, so it is much easier.

I don't see why this shouldn't follow the normal patch flow for
configuration
frag changes.

Cheers,

Bruce


>
>
> $ diff .config.old .config -Nur
> --- .config.old 2016-02-25 01:04:25.816381913 -0800
> +++ .config     2016-02-25 01:16:31.332232759 -0800
> @@ -1479,7 +1479,7 @@
>  # CONFIG_SCSI_DEBUG is not set
>  # CONFIG_SCSI_PMCRAID is not set
>  # CONFIG_SCSI_PM8001 is not set
> -# CONFIG_SCSI_VIRTIO is not set
> +CONFIG_SCSI_VIRTIO=y
>  # CONFIG_SCSI_DH is not set
>  # CONFIG_SCSI_OSD_INITIATOR is not set
>  CONFIG_ATA=y
>
> $ du bzImage bzImage_new
> 6752    bzImage
> 6756    bzImage_new
>
> It nearly has no impact on the size.
>
> --
> Thanks
>
> Robert
> --
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>



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