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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2018-02-27 02:25:54 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-02-28 17:24:12 +0300 |
| commit | ae8d1d0061ad7996c2c5e769e809a593544fa145 (patch) | |
| tree | f89d79990bb9af94618f69159e11e34b00cf04ae /arch/x86/mm/Makefile | |
| parent | 1ea4fe84973854a7302e4d1c479f10ae25a93e4a (diff) | |
| download | linux-ae8d1d0061ad7996c2c5e769e809a593544fa145.tar.xz | |
x86/mm/sme: Disable stack protection for mem_encrypt_identity.c
Stack protection is not compatible with early boot code. All of the early
SME boot code is now isolated in a separate file, mem_encrypt_identity.c,
so arch/x86/mm/Makefile can be updated to turn off stack protection for
the entire file. This eliminates the need to worry about other functions
within the file being instrumented with stack protection (as was seen
when a newer version of GCC instrumented sme_encrypt_kernel() where an
older version hadn't). It also allows removal of the __nostackprotector
attribute from individual functions.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Borislav Petkov <bp@alien8.de>
Link: https://lkml.kernel.org/r/20180226232554.14108.16881.stgit@tlendack-t1.amdoffice.net
Diffstat (limited to 'arch/x86/mm/Makefile')
| -rw-r--r-- | arch/x86/mm/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/mm/Makefile b/arch/x86/mm/Makefile index 03c6c8561623..4b101dd6e52f 100644 --- a/arch/x86/mm/Makefile +++ b/arch/x86/mm/Makefile @@ -19,6 +19,7 @@ obj-y := init.o init_$(BITS).o fault.o ioremap.o extable.o pageattr.o mmap.o \ nostackp := $(call cc-option, -fno-stack-protector) CFLAGS_physaddr.o := $(nostackp) CFLAGS_setup_nx.o := $(nostackp) +CFLAGS_mem_encrypt_identity.o := $(nostackp) CFLAGS_fault.o := -I$(src)/../include/asm/trace |