Re: qemu needs target kernel sets CONFIG_SCSI_VIRTIO=y to boot vmdk qcow2 and vdi

From: Robert Yang <liezhi.yang@windriver.com>
To: Bruce Ashfield <bruce.ashfield@gmail.com>
Cc: Darren Hart <dvhart@linux.intel.com>,
	Patches and discussions about the oe-core layer
	<openembedded-core@lists.openembedded.org>
Subject: Re: qemu needs target kernel sets CONFIG_SCSI_VIRTIO=y to boot vmdk qcow2 and vdi
Date: Fri, 26 Feb 2016 09:01:06 +0800	[thread overview]
Message-ID: <56CFA3D2.70300@windriver.com> (raw)
In-Reply-To: <CADkTA4PM1AYzUH9d8RGOyaeMmQmr+iSXRjcEQGpqWj7TCXNcwQ@mail.gmail.com>

On 02/25/2016 08:42 PM, Bruce Ashfield wrote:
>
>
> On Thu, Feb 25, 2016 at 5:36 AM, Robert Yang <liezhi.yang@windriver.com
> <mailto:liezhi.yang@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     on kernel, but I prefer scsi since ide is going to be out of date.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.

Sorry, the problem was that I didn't know how to send patch for yocto kernel:-).
I will send the patch to linux-yocto.

// Robert

>
> 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
>     --
>     _______________________________________________
>     Openembedded-core mailing list
>     Openembedded-core@lists.openembedded.org
>     <mailto:Openembedded-core@lists.openembedded.org>
>     http://lists.openembedded.org/mailman/listinfo/openembedded-core
>
>
>
>
> --
> "Thou shalt not follow the NULL pointer, for chaos and madness await thee at its
> end"