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s390: move nobp parameter functions to nospec-branch.c

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Keep the code for the nobp parameter handling with the code for
expolines. Both are related to the spectre v2 mitigation.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
2018-03-23 17:09:39 +01:00
parent b9dd652499
commit b2e2f43a01
3 changed files with 29 additions and 25 deletions
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23
arch/s390/kernel/alternative.c
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@@ -15,29 +15,6 @@ static int __init disable_alternative_instructions(char *str)
early_param("noaltinstr", disable_alternative_instructions);
static int __init nobp_setup_early(char *str)
{
bool enabled;
int rc;
rc = kstrtobool(str, &enabled);
if (rc)
return rc;
if (enabled && test_facility(82))
__set_facility(82, S390_lowcore.alt_stfle_fac_list);
else
__clear_facility(82, S390_lowcore.alt_stfle_fac_list);
return 0;
}
early_param("nobp", nobp_setup_early);
static int __init nospec_setup_early(char *str)
{
__clear_facility(82, S390_lowcore.alt_stfle_fac_list);
return 0;
}
early_param("nospec", nospec_setup_early);
struct brcl_insn {
u16 opc;
s32 disp;