On Fri, Sep 29, 2017 at 11:24:19AM -0500, Tom Lendacky wrote:
> Some routines in mem_encrypt.c are called very early in the boot process,
> e.g. sme_encrypt_kernel(). When CONFIG_TRACE_BRANCH_PROFILING is defined
> the resulting branch profiling associated with the check to see if SME is
> active results in a kernel crash. Disable branch profiling for
> mem_encrypt.c by defining DISABLE_BRANCH_PROFILING before including any
> header files.
>
> Reported-by: kernel test robot <l...@01.org>
> Signed-off-by: Tom Lendacky <thomas.lenda...@amd.com>
> ---
> arch/x86/mm/mem_encrypt.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
> index 3fcc8e0..16c5f37 100644
> --- a/arch/x86/mm/mem_encrypt.c
> +++ b/arch/x86/mm/mem_encrypt.c
> @@ -10,6 +10,8 @@
> * published by the Free Software Foundation.
> */
>
> +#define DISABLE_BRANCH_PROFILING
> +
> #include <linux/linkage.h>
> #include <linux/init.h>
> #include <linux/mm.h>
Acked-by: Borislav Petkov <b...@suse.de>
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
