On Sun, 08 Oct 2023 09:54:22 +1100 Michael Ellerman <mpe@xxxxxxxxxxxxxx> wrote: > > I don't know why powerpc's PTE_INDEX_SIZE is variable. > > To allow a single vmlinux to boot using either the Hashed Page Table > MMU, or Radix Tree MMU, which have different page table geometry. > > That's a pretty crucial feature for distros, so that they can build a > single kernel to boot on Power8/9/10. Dumb question: why can't distros ship two kernels and have the boot loader (or something else) pick the appropriate one?
