diff --git a/qemu/target-sparc/translate.c b/qemu/target-sparc/translate.c
index a5b39c70..c43bd661 100644
--- a/qemu/target-sparc/translate.c
+++ b/qemu/target-sparc/translate.c
@@ -5248,7 +5248,8 @@ static void disas_sparc_insn(DisasContext * dc, unsigned int insn, bool hook_ins
                     if (IS_IMM) {
                         goto illegal_insn;
                     }
-                    if (!supervisor(dc)) {
+                    /* LEON3 allows CASA from user space with ASI 0xa */
+                    if ((GET_FIELD(insn, 19, 26) != 0xa) && !supervisor(dc)) {
                         goto priv_insn;
                     }
 #endif