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-rw-r--r--target-s390x/cpu.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h
index 08cdb1529e..c24ca5f7fc 100644
--- a/target-s390x/cpu.h
+++ b/target-s390x/cpu.h
@@ -853,6 +853,7 @@ struct sysib_322 {
#define _PAGE_RO 0x200 /* HW read-only bit */
#define _PAGE_INVALID 0x400 /* HW invalid bit */
+#define _PAGE_RES0 0x800 /* bit must be zero */
#define SK_C (0x1 << 1)
#define SK_R (0x1 << 2)