RFR: JDK-8303575: adjust Xen handling on Linux aarch64

Wed Mar 8 11:42:17 UTC 2023

On Fri, 3 Mar 2023 12:56:55 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> After [JDK-8301050](https://bugs.openjdk.org/browse/JDK-8301050) the Xen handling on aarch64 should be slightly adjusted.
> The output in VM_Version::print_platform_virtualization_info was missed and needs to be added for Xen.
> Additionally a new XenPVHVM virtualization type could be introduced because this describes the Xen on aarch64 better.
> See also https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/virtualization-on-arm-with-xen where the naming is used.

Hi Martin and Lutz, thanks for the reviews !

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PR: https://git.openjdk.org/jdk/pull/12853