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Date:   Mon, 15 Apr 2019 20:43:48 +0200
From:   Greg Kroah-Hartman <>
Cc:     Greg Kroah-Hartman <>,, Diana Craciun <>,
        Michael Ellerman <>,
        Sasha Levin <>
Subject: [PATCH 4.9 24/76] powerpc/64: Make meltdown reporting Book3S 64 specific

commit 406d2b6ae3420f5bb2b3db6986dc6f0b6dbb637b upstream.

In a subsequent patch we will enable building security.c for Book3E.
However the NXP platforms are not vulnerable to Meltdown, so make the
Meltdown vulnerability reporting PPC_BOOK3S_64 specific.

Signed-off-by: Diana Craciun <>
[mpe: Split out of larger patch]
Signed-off-by: Michael Ellerman <>
Signed-off-by: Sasha Levin <>
 arch/powerpc/kernel/security.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
index 926ed3c38741..2f30fc8ed0a8 100644
--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c
@@ -93,6 +93,7 @@ static __init int barrier_nospec_debugfs_init(void)
 #endif /* CONFIG_DEBUG_FS */
+#ifdef CONFIG_PPC_BOOK3S_64
 ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr, char *buf)
 	bool thread_priv;
@@ -125,6 +126,7 @@ ssize_t cpu_show_meltdown(struct device *dev, struct device_attribute *attr, cha
 	return sprintf(buf, "Vulnerable\n");
 ssize_t cpu_show_spectre_v1(struct device *dev, struct device_attribute *attr, char *buf)

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