Commit-ID: bc829ee36e0ec92383c9d9b88fe08f00d4d592f8 Gitweb: https://git.kernel.org/tip/bc829ee36e0ec92383c9d9b88fe08f00d4d592f8 Author: Tom Lendacky <thomas.lenda...@amd.com> AuthorDate: Fri, 29 Sep 2017 11:24:19 -0500 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Fri, 29 Sep 2017 19:37:51 +0200
x86/mm: Disable branch profiling in mem_encrypt.c Some routines in mem_encrypt.c are called very early in the boot process, e.g. sme_encrypt_kernel(). When CONFIG_TRACE_BRANCH_PROFILING=y 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> Acked-by: Borislav Petkov <b...@suse.de> Cc: Borislav Petkov <b...@alien8.de> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/20170929162419.6016.53390.st...@tlendack-t1.amdoffice.net Signed-off-by: Ingo Molnar <mi...@kernel.org> --- 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>
