On Tue, Feb 18, 2020 at 4:44 PM Yonghong Song <yhs@xxxxxx> wrote: > > The latest llvm supports cpu version v3, which is cpu version v1 > plus some additional 64bit jmp insns and 32bit jmp insn support. > > In selftests/bpf Makefile, the llvm flag -mcpu=probe did runtime > probe into the host system. Depending on compilation environments, > it is possible that runtime probe may fail, e.g., due to > memlock issue. This will cause generated code with cpu version v1. > This may cause confusion as the same compiler and the same C code > generates different byte codes in different environment. > > Let us change the llvm flag -mcpu=probe to -mcpu=v3 so the > generated code will be the same regardless of the compilation > environment. > > Signed-off-by: Yonghong Song <yhs@xxxxxx> > --- Acked-by: Andrii Nakryiko <andriin@xxxxxx> > tools/testing/selftests/bpf/Makefile | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > [...]
