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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2017-09-29 11:24:19 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-09-29 19:37:51 +0200 |
| commit | bc829ee36e0ec92383c9d9b88fe08f00d4d592f8 (patch) | |
| tree | bb467dfcdca2a208d8dbac21d1b810442fb79916 | |
| parent | 520a13c530aeb5f63e011d668c42db1af19ed349 (diff) | |
| download | linux-stable-bc829ee36e0ec92383c9d9b88fe08f00d4d592f8.tar.gz linux-stable-bc829ee36e0ec92383c9d9b88fe08f00d4d592f8.tar.bz2 linux-stable-bc829ee36e0ec92383c9d9b88fe08f00d4d592f8.zip | |
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 <lkp@01.org>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170929162419.6016.53390.stgit@tlendack-t1.amdoffice.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | arch/x86/mm/mem_encrypt.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c index 3fcc8e01683b..16c5f37933a2 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> |