[PATCH v5 2/8] powerpc/64: Make stf barrier PPC_BOOK3S_64 specific.
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2018-07-27 23:06:51
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
From: Diana Craciun <redacted> NXP Book3E platforms are not vulnerable to speculative store bypass, so make the mitigations PPC_BOOK3S_64 specific. Signed-off-by: Diana Craciun <redacted> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> --- arch/powerpc/kernel/security.c | 3 +++ 1 file changed, 3 insertions(+) v5: No change.
diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
index 79f9397998ed..77f253a6f8c9 100644
--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c@@ -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 +324,5 @@ static __init int stf_barrier_debugfs_init(void) } device_initcall(stf_barrier_debugfs_init); #endif /* CONFIG_DEBUG_FS */ +#endif /* CONFIG_PPC_BOOK3S_64 */ +
--
2.14.1