1 files changed, 5 insertions, 0 deletions

diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index 52f57af252b4..3c77dd36994c 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -19,6 +19,7 @@
 #include <asm/system.h>
 #include <asm/smp.h>
 #include <asm/reset.h>
+#include <asm/ipl.h>
 
 typedef void (*relocate_kernel_t)(kimage_entry_t *, unsigned long);
 
@@ -29,6 +30,10 @@ int machine_kexec_prepare(struct kimage *image)
 {
         void *reboot_code_buffer;
 
+        /* Can't replace kernel image since it is read-only. */
+        if (ipl_flags & IPL_NSS_VALID)
+                return -ENOSYS;
+
         /* We don't support anything but the default image type for now. */
         if (image->type != KEXEC_TYPE_DEFAULT)
                 return -EINVAL;