kernel-source-xen from home:smarty12:kernel-6.11 project
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Add repository and install manually
For openSUSE Leap 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:smarty12:kernel-6.11/openSUSE_Leap_15.6/home:smarty12:kernel-6.11.repo zypper refresh zypper install kernel-source-xen