On Tue, Oct 10, 2017 at 02:45:04PM -0500, Tom Lendacky wrote: > Some routines in mem_encrypt.c are called very early in the boot process, > e.g. sme_enable(). When CONFIG_KCOV is defined the resulting code added > to sme_enable() (and others) for KCOV instrumentation results in a kernel > crash. Disable the KCOV instrumentation for mem_encrypt.c by adding > KCOV_INSTRUMENT_mem_encrypt.o := n to arch/x86/mm/Makefile. > > In order to avoid other possible early boot issues, model mem_encrypt.c > after head64.c in regards to tools. In addition to disabling KCOV as > stated above and a previous patch that disables branch profiling, also > remove the "-pg" CFLAG if CONFIG_FUNCTION_TRACER is enabled and set > KASAN_SANITIZE to "n", each of which are done on a file basis. > > Reported-by: kernel test robot <[email protected]> > Signed-off-by: Tom Lendacky <[email protected]> > --- > arch/x86/mm/Makefile | 11 +++++++++-- > 1 file changed, 9 insertions(+), 2 deletions(-)
Reviewed-by: Borislav Petkov <[email protected]> -- Regards/Gruss, Boris. Good mailing practices for 400: avoid top-posting and trim the reply.
