Re: [Xen-devel] [PATCH v2] xen/arm: platform: fix Raspberry Pi compatible string

[Julien Grall <julien.grall@xxxxxxx>]

Hi,

On 15/10/2019 17:18, Stewart Hildebrand wrote:
> On Tuesday, October 15, 2019 7:02 AM, Julien Grall wrote:
> > Hi,
> Hi!
>
> > On 10/9/19 5:59 PM, Stewart Hildebrand wrote:
> > > However, even with Xen looking for bcm2838, you wouldn't be able to
> > > grab one of those releases and boot without running into other issues.
> > > You'd still need a couple of additional patches at [4]. Currently the
> > > only way that I'm aware of to successfully boot into dom0 and launch
> > > domU is to build the dom0 kernel from source with the extra patches
> > > applied found at [4].
> > Is there any plan to upstream those patches?
> Two of the patches are adding device tree nodes (xen,xen-bootargs,
> etc), so those are unlikely to be upstreamed. One patch is a
> hack/workaround to disable DMA for the SD card, also unlikely to be
> upstreamed. Finally, the last patch adds a check to avoid invoking
> xen_dma_ops recursively. This one could potentially be upstreamed,
> though we haven't submitted or gathered any input from the linux or
> raspberry pi communities yet.
>
> We are tracking the following patch sets [5] [6] [7] for upstream, and
> our current plan is basically to wait until they have been merged, try
> booting the upstream kernel, then see if it is still necessary to apply
> the DMA workarounds.
>
> [5] https://patchwork.kernel.org/cover/11165395/
> [6] https://patchwork.kernel.org/cover/11159379/
> [7] https://patchwork.kernel.org/cover/11141719/
Thank you for the information. Let Stefano and I know if we can help.

> > > "If you are using a device tree with the old compatible string
> > > brcm,bcm2838, you will need to upgrade your device tree to one that has
> > > the new brcm,bcm2711 compatible string."
> > That's fine with me.
> OK, since it's simply a matter of adding this to the commit message,
> can it be added on commit? Or should I spin a v3 with the updated
> commit message?
Can you please respin the patch and CC Juergen?
Cheers,

--
Julien Grall

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