RFR: JDK-8301050: Detect Xen Virtualization on Linux aarch64 [v2]

[Christoph Langer]

On Wed, 1 Feb 2023 13:09:19 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> With https://bugs.openjdk.org/browse/JDK-8300266 KVM and VMWare virtualization detection has been added; this should be enhanced by Xen detection.
>> However it seems that for Xen we should look at other file system locations compared to the other virtualizations.
>> more /sys/hypervisor/type
>> xen
>> seems to be available there.
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Do not scan the product_name file twice

What about modifying Abstract_VM_Version::_detected_virtualization directly in check_info_file? You could also consider passing varargs to check_info_file for the string to look for and the resulting value of _detected_virtualization.

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PR: https://git.openjdk.org/jdk/pull/12217