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x86/cpu: Remove CONFIG_X86_SMAP and "nosmap"

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Those were added as part of the SMAP enablement but SMAP is currently
an integral part of kernel proper and there's no need to disable it
anymore.

Rip out that functionality. Leave --uaccess default on for objtool as
this is what objtool should do by default anyway.

If still needed - clearcpuid=smap.

Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Lai Jiangshan <jiangshanlai@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20220127115626.14179-4-bp@alien8.de
This commit is contained in:
Borislav Petkov
2022-01-27 12:56:23 +01:00
parent c949110ef4
commit dbae0a934f
9 changed files with 10 additions and 71 deletions
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6
scripts/link-vmlinux.sh
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@@ -146,9 +146,9 @@ objtool_link()
if is_enabled CONFIG_RETPOLINE; then
objtoolopt="${objtoolopt} --retpoline"
fi
if is_enabled CONFIG_X86_SMAP; then
objtoolopt="${objtoolopt} --uaccess"
fi
objtoolopt="${objtoolopt} --uaccess"
if is_enabled CONFIG_SLS; then
objtoolopt="${objtoolopt} --sls"
fi