summaryrefslogtreecommitdiff
path: root/arch/s390/Makefile
diff options
context:
space:
mode:
authorMartin Schwidefsky <schwidefsky@de.ibm.com>2018-03-23 15:04:49 +0300
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2018-03-28 09:38:24 +0300
commit6e179d64126b909f0b288fa63cdbf07c531e9b1d (patch)
treed3b27e05dca18c669c42ba1b7833179c1b83a273 /arch/s390/Makefile
parentb2e2f43a01bace1a25bdbae04c9f9846882b727a (diff)
downloadlinux-6e179d64126b909f0b288fa63cdbf07c531e9b1d.tar.xz
s390: add automatic detection of the spectre defense
Automatically decide between nobp vs. expolines if the spectre_v2=auto kernel parameter is specified or CONFIG_EXPOLINE_AUTO=y is set. The decision made at boot time due to CONFIG_EXPOLINE_AUTO=y being set can be overruled with the nobp, nospec and spectre_v2 kernel parameters. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/Makefile')
-rw-r--r--arch/s390/Makefile2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index bd424f6a3c5b..c79936d02f7b 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -81,7 +81,7 @@ ifdef CONFIG_EXPOLINE
CC_FLAGS_EXPOLINE += -mfunction-return=thunk
CC_FLAGS_EXPOLINE += -mindirect-branch-table
export CC_FLAGS_EXPOLINE
- cflags-y += $(CC_FLAGS_EXPOLINE)
+ cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
endif
endif