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| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-03-23 13:04:49 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2018-03-28 08:38:24 +0200 |
| commit | 6e179d64126b909f0b288fa63cdbf07c531e9b1d (patch) | |
| tree | d3b27e05dca18c669c42ba1b7833179c1b83a273 /arch/s390/kernel/alternative.c | |
| parent | s390: move nobp parameter functions to nospec-branch.c (diff) | |
| download | linux-dev-6e179d64126b909f0b288fa63cdbf07c531e9b1d.tar.xz linux-dev-6e179d64126b909f0b288fa63cdbf07c531e9b1d.zip | |
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/kernel/alternative.c')
| -rw-r--r-- | arch/s390/kernel/alternative.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kernel/alternative.c b/arch/s390/kernel/alternative.c index 1abf4f35d059..8e1f2aee85ef 100644 --- a/arch/s390/kernel/alternative.c +++ b/arch/s390/kernel/alternative.c @@ -2,6 +2,7 @@ #include <linux/module.h> #include <asm/alternative.h> #include <asm/facility.h> +#include <asm/nospec-branch.h> #define MAX_PATCH_LEN (255 - 1) |