Re: [PATCH 0/8] Add support for Qualcomm SA8155-ADP board

[Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>]

Hi Caleb,

Caleb Connolly <caleb.connolly@linaro.org> writes:

> On 29/02/2024 14:21, Volodymyr Babchuk wrote:
>> 
>> This patch series adds support for Qualcomm SA8155-ADP development
>> board. Main motivation for this series is to allow running
>> virtualization software on this board and U-Boot is a good way to
>> break Qualcomm's boot chain at EL2 with more convenient ways for
>> uploading and running the code. With this patches applied it is
>> possible to upload and run Xen on this board. KVM probably should work
>> too.
>
> This is really cool! I've experimented with this on SDM845 and SM8250
> but never really did anything with it... I'd love to take a look at your
> Xen branch?

Honestly, there is nothing to look at right now. I just implemented
early printk serial driver for the qcom, made hacks to the device tree
and trying to boot Dom0. I already expecting issues with the GPU,
because it has own SMMU without virtualization support and Xen already
complains about it. So I had to remove it from the DTS for a time being.

Anyways, right now my Dom0 does not want to boot due to some issues with
UFS. I suspect that some power domain or clock is disabled or some
other bit of initialization is missing in the mainline Linux. And
reason why bare Linux kernel have no issues with UFS is because
aboot/xbl does proper UFS initialization, while in my case I am skipping
the android bootloader completely...

I'll publish my work when I'll get Dom0 running.

-- 
WBR, Volodymyr