diff options
| author | Tom Lendacky <thomas.lendacky@amd.com> | 2017-10-10 14:45:04 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-10-11 17:22:59 +0200 |
| commit | 67bb8e999e0aeac285d22f0e53c856b9df5282c6 (patch) | |
| tree | 1bd5abf67dfc0245718d5edf3ff8d531355f6a50 /arch/x86/events | |
| parent | ab7ff471aa5db670197070760f022622793da7e5 (diff) | |
x86/mm: Disable various instrumentations of mm/mem_encrypt.c and mm/tlb.c
Some routines in mem_encrypt.c are called very early in the boot process,
e.g. sme_enable(). When CONFIG_KCOV=y 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 <lkp@01.org>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-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/20171010194504.18887.38053.stgit@tlendack-t1.amdoffice.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/events')
0 files changed, 0 insertions, 0 deletions