[systemd-devel] [PATCH] systemd-detect-s390-virt: add virtualization detection on s390x

[Thomas Blume]

On Mon, 7 Jul 2014, Lennart Poettering wrote:

>> Actually it is like there is no dom0 on s390(x).
>> Direct hardware access is done on a level where the operating system doesn't
>> have any influence.
>> For example, unlike Xen dom0, the disks are never physical devices, they are
>> only shares of a storage pool.
>> Same is true for e.g. the CPUs or the main memory. It is all virtualized.
>> Some functions, like e.g. SMART for the disks, just doesn't make sense here.
>> Even if PR/SM is closer to the hardware than z/VM or KVM, the
>> e behaviour is the same. There is no useful SMART information.
>
> If everything is virtualized on s390, what's the difference between the
> two virtualizations you wanted to distuingish then?

For the test, e.g. ConditionVirtualization, there would be no difference.
I only distinguished this in order to have systemd-detect-virt showing the
correct virtualization technology.
Sure we could cover everything under something like, e.g. "s390 virtualization".
But I thought it is smarter to give this little additional information.
Maybe there are some cases where someone needs to know in more detail which
virtualization is running.

Regards
Thomas