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powerpc/64: Make stf barrier PPC_BOOK3S_64 specific.

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commit 6453b532f2 upstream.

NXP Book3E platforms are not vulnerable to speculative store
bypass, so make the mitigations PPC_BOOK3S_64 specific.

Signed-off-by: Diana Craciun <diana.craciun@nxp.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Diana Craciun 2019-03-29 22:25:57 +11:00 committed by Greg Kroah-Hartman
parent 64ca6cd4ae
commit 5a56eba71a
1 changed files with 2 additions and 0 deletions
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2
arch/powerpc/kernel/security.c
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@ -176,6 +176,7 @@ ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr, c
return s.len;
}
#ifdef CONFIG_PPC_BOOK3S_64
/*
* Store-forwarding barrier support.
*/
@ -323,3 +324,4 @@ static __init int stf_barrier_debugfs_init(void)
}
device_initcall(stf_barrier_debugfs_init);
#endif /* CONFIG_DEBUG_FS */
#endif /* CONFIG_PPC_BOOK3S_64 */