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

From: Michal Suchanek <msuchanek@suse.de>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	Michal Suchanek <msuchanek@suse.de>,
	Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>,
	Nicholas Piggin <npiggin@gmail.com>,
	Michael Neuling <mikey@neuling.org>,
	linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH] powerpc/64s: Enhance the information in cpu_show_spectre_v1()
Date: Mon, 28 May 2018 15:19:14 +0200	[thread overview]
Message-ID: <20180528131914.32231-1-msuchanek@suse.de> (raw)
In-Reply-To: <20180424041559.32410-1-mpe@ellerman.id.au>


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>
---
 arch/powerpc/kernel/security.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
index 0239383c7e4d..a0c32d53980b 100644
--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c
@@ -120,7 +120,10 @@ 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");
 
-	return sprintf(buf, "Vulnerable\n");
+	if (barrier_nospec_enabled)
+		return sprintf(buf, "Mitigation: __user pointer sanitization\n");
+	else
+		return sprintf(buf, "Vulnerable\n");
 }
 
 ssize_t cpu_show_spectre_v2(struct device *dev, struct device_attribute *attr, char *buf)
-- 
2.13.6
