[PATCH stable v4.14 06/32] powerpc/64s: Enhance the information in cpu_show_spectre_v1()

Michael Ellerman mpe at ellerman.id.au
Fri Mar 29 22:25:54 AEDT 2019

From: Michal Suchanek <msuchanek at suse.de>

commit a377514519b9a20fa1ea9adddbb4129573129cef upstream.

We now have barrier_nospec as mitigation so print it in
cpu_show_spectre_v1() when enabled.

Signed-off-by: Michal Suchanek <msuchanek at suse.de>
Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
 arch/powerpc/kernel/security.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
index 7553951b500a..a8b277362931 100644
--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c
@@ -120,6 +120,9 @@ ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, c
 	if (!security_ftr_enabled(SEC_FTR_BNDS_CHK_SPEC_BAR))
 		return sprintf(buf, "Not affected\n");
+	if (barrier_nospec_enabled)
+		return sprintf(buf, "Mitigation: __user pointer sanitization\n");
 	return sprintf(buf, "Vulnerable\n");

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