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Subject[PATCH 4.14 032/107] powerpc/64: Make stf barrier PPC_BOOK3S_64 specific.
Date
4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Diana Craciun <diana.craciun@nxp.com>

commit 6453b532f2c8856a80381e6b9a1f5ea2f12294df 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>
---
arch/powerpc/kernel/security.c | 2 ++
1 file changed, 2 insertions(+)

--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c
@@ -176,6 +176,7 @@ ssize_t cpu_show_spectre_v2(struct devic
return s.len;
}

+#ifdef CONFIG_PPC_BOOK3S_64
/*
* Store-forwarding barrier support.
*/
@@ -323,3 +324,4 @@ static __init int stf_barrier_debugfs_in
}
device_initcall(stf_barrier_debugfs_init);
#endif /* CONFIG_DEBUG_FS */
+#endif /* CONFIG_PPC_BOOK3S_64 */

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