[Xen-users] ARM: Xen 4.11 + modern dom0 on ODROID-XU4/HC1 (Exynos 5422)

[Steve Dodd <steved424@xxxxxxxxx>]

Hi all,

Having successfully followed the instructions at
https://wiki.odroid.com/odroid-xu4/application_note/software/xen_virtualization
to get an old Xen and dom0 kernel working on my ODROID HC1 I'd like to
get a more modern setup working.

I managed to get the 4.11 hypervisor to boot happily with the bits of
https://github.com/bkrepo/xen/commit/8d56205455a4a1e0233421d3ee98e3c7dee20bd2
that deal with the CPU initialization (the trap/hypercall change seems
to already be a part of 4.11 in a different form.) Any chance of
getting this patch merged?

What I am completely stuck on is getting a modern dom0 working. The
handful of patches in
https://github.com/bkrepo/linux-dom0/commits/odroidxu3-3.10.y-xen seem
only to enable the relevant config options, patch the device tree with
the arch timer and "xen-dom0" passthrough section, and backport the
PSCI support which is already in 4.14, so I've tried applying these
changes to the ODROID 4.14 tree at
https://github.com/hardkernel/linux, with no success.

Using the FDT from the working 3.x dom0 with the 4.14 zImage, it boots
but doesn't seem to find any of the underlying hardware, certainly not
the USB attached SSD which I need to boot.

Using the FDT from the ODROID 4.14 tree, patched for arch timer and
the xen-dom0 section, the hypervisor sticks at "(XEN) 3..."

Unfortunately I'm not at all familiar with either Xen or the ARM
architecture, so would really appreciate it if anyone could steer me
in the right direction!

Thanks,
Steve

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