integrity: Make arch_ima_get_secureboot integrity-wide

EVM and other LSMs need the ability to query the secure boot status of
the system, without directly calling the IMA arch_ima_get_secureboot
function. Refactor the secure boot status check into a general function
named arch_get_secureboot.

Reported-and-suggested-by: Mimi Zohar <zohar@linux.ibm.com>
Suggested-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Coiby Xu <coxu@redhat.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>

2 files changed, 5 insertions, 6 deletions

diff --git a/arch/s390/kernel/ima_arch.c b/arch/s390/kernel/ima_arch.c
index f3c3e6e1c5d3..6ccbe34ce408 100644
--- a/arch/s390/kernel/ima_arch.c
+++ b/arch/s390/kernel/ima_arch.c
@@ -1,12 +1,6 @@
 // SPDX-License-Identifier: GPL-2.0
 
 #include <linux/ima.h>
-#include <asm/boot_data.h>
-
-bool arch_ima_get_secureboot(void)
-{
-	return ipl_secure_flag;
-}
 
 const char * const *arch_get_ima_policy(void)
 {
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 049c557c452f..bdbbedf52580 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -2504,6 +2504,11 @@ out:
 	return buf;
 }
 
+bool arch_get_secureboot(void)
+{
+	return ipl_secure_flag;
+}
+
 int ipl_report_free(struct ipl_report *report)
 {
 	struct ipl_report_component *comp, *ncomp;