56-bit support was specced and had software support already in ~2016. 48 bits is not a hard architecture limitation. see eg https://www.kernel.org/doc/html/late

56-bit support was specced and had software support already in ~2016. 48 bits is not a hard architecture limitation. see eg https://www.kernel.org/doc/html/latest/x86/x86_64/5level-paging.html https://www.kernel.org/doc/html/latest/x86/x86_64/5level-pag...