admin/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2025-12-07 20:06:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

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

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

27
arch/s390/kernel/nospec-branch.c
View File

@@ -2,6 +2,31 @@
#include <linux/module.h>
#include <asm/nospec-branch.h>
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);
#ifdef CONFIG_EXPOLINE
int nospec_call_disable = IS_ENABLED(CONFIG_EXPOLINE_OFF);
int nospec_return_disable = !IS_ENABLED(CONFIG_EXPOLINE_FULL);
@@ -98,3 +123,5 @@ void __init nospec_init_branches(void)
nospec_call_revert(__nospec_call_start, __nospec_call_end);
nospec_return_revert(__nospec_return_start, __nospec_return_end);
}
#endif /* CONFIG_EXPOLINE */