>> >> > Hi all, >> >> > >> >> > I want to use the armhf fedora rootfs on the aarch64 bit kernel. >> >> >> >> You can't, it's not a use case we support. >> >> >> > Why not? All arm binaries can be runnable on aarch32 mode of aarch64 >> > kernel. >> >> Not exactly actually, it's possible to have aarch64/ARMv8 CPUs that >> don't have the 32 bit components. >> >> >> > The question is 'how can I run 'dnf' command on armhf fedora with >> >> > aarch64 kernel?' >> >> >> >> No, the ARMv7 and aarch64 ABI aren't compatible, the only way we >> >> support ARMv7 on aarch64 is via virtualisation. We will not be >> >> supporting this or a "multilib" usecase. >> > >> > >> > The aarch64 kernel can execute both aarch64 and aarch32(fully compatible >> > armv7) binaries. For example, the kernel of raspberry pi 3 is aarch64 >> > and >> > fedora arm version can't run on rpi3. Even all binaries can run on it >> > but >> > only dnf command can't do that. >> >> Actually that isn't entirely true. The kernel that's currently shipped >> in raspbian for RPi3 is actually an ARMv7 kernel where the firmware >> boots the ARM cores as v7 cores. The kernel code that's running there >> is ARMv7 code not cortex-a53 code paths. That is a fairly special >> usecase and you can actually do that on Fedora ARMv7 with a Fedora >> ARMv7 kernel, not a aarch64 kernel. > > Ah. Sorry. It's not good example. Actually, rpi3 try to enable aarch64 > kernel but they can't di that lack of time. > (https://www.linux.com/news/raspberry-pi-3-still-essentially-32-bit-sbc-now) > Pine64 is also available cheap board which kernel is aarch64 version. > >> >> ARM multilib is something we explicitly decided not to support when we >> were dealing with that. Multilib is a mess on x86, it's not a mess we >> need on ARM. > > > No. It's not multilib. I want to run _only_ armv7 binaries and libraries. I > want to know why only 'dnf' is impossible do that. Because we don't support it. For example the aarch64 kernels have a 64K page size, ARMv7 uses 4K. So you'd need a custom kernel before you even start so you may as well do a custom image. _______________________________________________ arm mailing list arm@xxxxxxxxxxxxxxxxxxxxxxx http://lists.fedoraproject.org/admin/lists/arm@xxxxxxxxxxxxxxxxxxxxxxx
