Andrii, On Mon, Feb 22, 2021 at 05:30:09PM -0800, Andrii Nakryiko wrote: > On Thu, Feb 11, 2021 at 3:44 PM Vitaly Chikunov <vt@xxxxxxxxxxxx> wrote: > > > > Hi, > > > > We have boot test using OVMF/AAVMF EFI firmware on aarch64 in qemu. When > > we try to build kernel with `CONFIG_DEBUG_INFO_BTF=y' (pahole v1.20) > > previously successful EFI boot test fails with: > > > > EFI stub: ERROR: Failed to relocate kernel > > EFI stub: ERROR: Failed to relocate kernel > > > > Without EFI it boots normally. On other our architectures (such as > > arm32, i586, powerpc, x86_64) it boots normally too (all without EFI > > boot, but x86_64 is also successfully tested with OVMF EFI boot). > > So this seems like an arm64-specific issue? Is it possible to get any > help from someone familiar with arm64 specifics to find out what > exactly causes this problem? We use `pahole -J` to "implant" .BTF into > vmlinux.o, but later rely on vmlinux loader scripts to have a loadable > .BTF section. The problem might happen somewhere along those steps. I > don't think I can be of much help here without a bit more information > (and seems like no one else on this list came up with any suggestions > as well). Thanks for the reply! After some experiments and debugging today it's turned out that problem is low default memory size for qemu. When increased to `-m 512` it booted good. Thereby, now we can enable BTF for aarch64 too. Vitaly, > > > > > This is tested on 5.4.97, but I can try 5.10.15 if needed. > > > > Thanks, > >
