From 0914ade209c452cff6a29b1c0ae6fff3167fa1d0 Mon Sep 17 00:00:00 2001
From: Nayna Jain <nayna@linux.ibm.com>
Date: Tue, 9 Oct 2018 23:00:33 +0530
Subject: x86/ima: define arch_ima_get_secureboot

Distros are concerned about totally disabling the kexec_load syscall.
As a compromise, the kexec_load syscall will only be disabled when
CONFIG_KEXEC_VERIFY_SIG is configured and the system is booted with
secureboot enabled.

This patch defines the new arch specific function called
arch_ima_get_secureboot() to retrieve the secureboot state of the system.

Signed-off-by: Nayna Jain <nayna@linux.ibm.com>
Suggested-by: Seth Forshee <seth.forshee@canonical.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Peter Jones <pjones@redhat.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Dave Young <dyoung@redhat.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
---
 include/linux/ima.h | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'include/linux/ima.h')

diff --git a/include/linux/ima.h b/include/linux/ima.h
index 97914a2833d1..948135fb60f1 100644
--- a/include/linux/ima.h
+++ b/include/linux/ima.h
@@ -30,6 +30,15 @@ extern void ima_post_path_mknod(struct dentry *dentry);
 extern void ima_add_kexec_buffer(struct kimage *image);
 #endif
 
+#ifdef CONFIG_X86
+extern bool arch_ima_get_secureboot(void);
+#else
+static inline bool arch_ima_get_secureboot(void)
+{
+	return false;
+}
+#endif
+
 #else
 static inline int ima_bprm_check(struct linux_binprm *bprm)
 {
-- 
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