[PATCH] powerpc/security: Show powerpc_security_features in debugfs

[Michael Ellerman]

This can be helpful for debugging problems with the security feature
flags, especially on guests where the flags come from the hypervisor
via an hcall and so can't be observed in the device tree.

Signed-off-by: Michael Ellerman <mpe at ellerman.id.au>
---
 arch/powerpc/kernel/security.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c
index b33bafb8fcea..d6ba696d0ed0 100644
--- a/arch/powerpc/kernel/security.c
+++ b/arch/powerpc/kernel/security.c
@@ -104,6 +104,14 @@ static __init int barrier_nospec_debugfs_init(void)
 	return 0;
 }
 device_initcall(barrier_nospec_debugfs_init);
+
+static __init int security_feature_debugfs_init(void)
+{
+	debugfs_create_x64("security_features", 0400, powerpc_debugfs_root,
+			   (u64 *)&powerpc_security_features);
+	return 0;
+}
+device_initcall(security_feature_debugfs_init);
 #endif /* CONFIG_DEBUG_FS */
 
 #ifdef CONFIG_PPC_FSL_BOOK3E
-- 
2.20.1