Single zImage and KVM

Michael Hope michael.hope at
Tue Mar 6 19:23:35 UTC 2012

On Wed, Mar 7, 2012 at 3:50 AM, Rob Herring <robherring2 at> wrote:
> On 03/04/2012 04:02 PM, Michael Hope wrote:
>> I'd like to have one KVM kernel image which is suitable for the real
>> hardware host and the virtio based guest.  The single zImage plus
>> Device Tree work seem like a great way to do this.
>> We're currently using the vexpress-a15 on a Fast Model as the host and
>> a vexpress-a15 as the guest.  Device Tree support is required to
>> describe the virtio-mmio devices.  As a bonus, the vexpress-a9 and
>> vexpress-a15 are the same hardware with a different memory map and can
>> help demonstrate the Device Tree support.
> Except LPAE and non-LPAE will be 2 different builds... At least you will
> be able to run the same non-LPAE kernel build on both.

Hardware virtualisation requires LPAE and we're planning on LPAE in
the guest to match.

>> What are the plans for single zImage?  Where does the vexpress-a15 fit
>> in with that?  Could I bump it to the front of the list?
> DT support for vexp A9 is going into 3.4 I believe. Pawel has been
> working on it and can probably give details on A15 support. A single
> kernel for these 2 platforms (and A7 as well) is much simpler than
> getting to a single zImage in general (i.e. omap plus But we'll
> be a lot closer in 3.4.

Linus 3.4 or the Landing Team 3.4?  From other emails it seems that
the work may be more on the packaging side.

Where are the Device Trees hosted?

-- Michael

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