The test tools/jlink/plugins/SaveJlinkArgfilesPluginTest.java fails on Linux ppc64le because it assumes that vm.jvmci is
available on all platforms but this is currently not the case on Linux ppc64le.
Error is :

Error: Module jdk.internal.vm.ci not found
java.lang.module.FindException: Module jdk.internal.vm.ci not found
at java.base/java.lang.module.Resolver.findFail(Resolver.java:892)
at java.base/java.lang.module.Resolver.resolve(Resolver.java:129)
at java.base/java.lang.module.Configuration.resolve(Configuration.java:420)
at java.base/java.lang.module.Configuration.resolve(Configuration.java:254)
at jdk.jlink/jdk.tools.jlink.internal.Jlink$JlinkConfiguration.resolve(Jlink.java:217)
at jdk.jlink/jdk.tools.jlink.internal.JlinkTask.createImageProvider(JlinkTask.java:551)
at jdk.jlink/jdk.tools.jlink.internal.JlinkTask.createImage(JlinkTask.java:439)
at jdk.jlink/jdk.tools.jlink.internal.JlinkTask.run(JlinkTask.java:291)
at jdk.jlink/jdk.tools.jlink.internal.Main.run(Main.java:56)
at jdk.jlink/jdk.tools.jlink.internal.Main$JlinkToolProvider.run(Main.java:73)
at tests.JImageGenerator$JLinkTask.call(JImageGenerator.java:715)
at tests.Helper.generateDefaultImage(Helper.java:257)
at SaveJlinkArgfilesPluginTest.main(SaveJlinkArgfilesPluginTest.java:66)
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:578)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:312)
at java.base/java.lang.Thread.run(Thread.java:1591)