[Fedora-xen] Re: package xen for aarch64
On Tue, 25 Oct 2016, Ricardo Salveti wrote:
On Sun, Oct 23, 2016 at 10:49 PM, Ricardo Salveti
<ricardo.salveti(a)linaro.org> wrote:
> On Fri, Oct 21, 2016 at 5:36 PM, M A Young <m.a.young(a)durham.ac.uk> wrote:
>> On Wed, 19 Oct 2016, Ricardo Salveti wrote:
>>
>>> On Wed, Oct 19, 2016 at 4:12 PM, M A Young <m.a.young(a)durham.ac.uk>
wrote:
>>> > On Tue, 18 Oct 2016, Anders Roxell wrote:
>>> >
>>> >> I'm trying to package dpdk for aarch64, but package xen-devel
is missing.
>>> >> Looking at the xen spec file, it seems the problem is the lack of
a
>>> >> compatible efi firmware for arm64, is that really the case?
>>> >
>>> > In Fedora, it is just that I haven't got around to adding ARM
support, and
>>> > as I have no way of testing it, I can't tell whether what is built
will
>>> > actually work. The current spec file is based around x86 but it should
be
>>> > possible to adapt it to allow ARM builds - I have experimented with it
in
>>> > the past.
>>>
>>> We can definitely help testing the rpm, once there is one rpm that is
>>> compatible with aarch64.
>>>
>>> Marcin, do you know if there is already an aarch64-compatible efi
>>> image for Fedora? I believe it would also make sense to build xen with
>>> efi support on aarch64.
>>
>> I have done a temporary build of the Fedora 25 xen package adapted for
>> aarch64 at
>> http://arm.koji.fedoraproject.org/koji/taskinfo?taskID=3757184
>>
>> Could you test it and see if it works or needs further modification. If it
>> is satifactory then I will look at adding aarch64 support to the main
>> Fedora package.
>
> The package installs fine, but fails to run as there is no xen support
> enabled in the kernel.
>
> I will try to recompile the kernel and enable the required config
> options, but it would be nice if you could also take a look at what is
> required, as there are many options related with xen support.
Built a new kernel including all the xen options, but still unable to
get it to work.
The grub2 entry fails to load due lack of efi modules:
Loading Xen 4.7.0.config ...
error: can't find command `multiboot'.
Loading Linux 4.8.3-300.fc25.aarch64 ...
error: can't find command `module'.
Loading initial ramdisk ...
error: can't find command `module'.
Looking at the grub2-efi-modules package, it seems there is no module
and no multiboot there.
And when trying to chainload the efi loader, it also fails with the
following message:
Xen 4.7.0 (c/s ) EFI loader
No configuration file found.
It seems unlikely that the multiboot option will work on aarch64 if there
is no multiboot module.
The chainloader option looks more promising. If your efi file is xen.efi
then it is looking for a xen.cfg file in the same directory to tell it any
xen options, what other files (still in the same directory) to load and
with what options. For more details see
http://xenbits.xenproject.org/docs/unstable/misc/efi.html
or equivalently docs/html/misc/efi.html in the xen source.
Michael Young