Re: [Xen-devel] Xen ARM small task (WAS: Re: [Xen Question])

["Edgar E. Iglesias" <edgar.iglesias@xxxxxxxxx>]

On Wed, Nov 23, 2016 at 06:26:06PM +0200, Artem Mygaiev wrote:
> On 23.11.16 17:19, Julien Grall wrote:
> > There is a couple of usecase where we cannot use PV console:
> >     - Running unmodified baremetal application as guest. Those
> > applications will not have PV driver.
> Well, I somehow missed that requirement is to run *unmodified*
> applications... I think it will be pretty hard to provide all the HW
> infrastructure expected and UARTs as I know them have all possible
> issues & workarounds.

Hi Artem,

The way I see this is not for Xen to provide support for any HW for any
platform on all platforms.

The way I see it is that on a given platform, for example the ZynqMP.
You can run Xen as a partitioning Hypervisor essentially using device
passthrough to assign various real HW devices to each VM.

The various guests can run unmodified because they each see a subset
of the platform.

It is useful to have vuarts that go are shared into a single one.

Cheers,
Edgar



> >     - Guest compliant with the VM system specification for ARM [1]. A
> > pl011 is required.
> Yes, indeed, a subset of PL011 registers is required, unfortunately I
> was not familiar with that spec, thanks.

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