powerpc/64s: Enhance the information in cpu_show_spectre_v1()

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@suse.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
index d0e974d..f189f94 100644 (file)
--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c
@@ -121,6 +121,9 @@ 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");
 }