s390x/tcg: Implement SIGNAL ADAPTER instruction

KVM suppresses SIGA, setting cc=3. Let's do the same for TCG, so we're at
least equal.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20171208160207.26494-12-david@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
index 2e47a6b..2507413 100644 (file)
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -1056,6 +1056,7 @@
     C(0xb238, RSCH,    S,     Z,   0, 0, 0, 0, rsch, 0)
     C(0xb237, SAL,     S,     Z,   0, 0, 0, 0, sal, 0)
     C(0xb23c, SCHM,    S,     Z,   0, insn, 0, 0, schm, 0)
+    C(0xb274, SIGA,    S,     Z,   0, 0, 0, 0, siga, 0)
     C(0xb23a, STCPS,   S,     Z,   0, 0, 0, 0, stcps, 0)
     C(0xb233, SSCH,    S,     Z,   0, insn, 0, 0, ssch, 0)
     C(0xb239, STCRW,   S,     Z,   0, insn, 0, 0, stcrw, 0)

diff --git a/target/s390x/translate.c b/target/s390x/translate.c
index 16febf4..83e1df0 100644 (file)
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -4132,6 +4132,14 @@ static ExitStatus op_schm(DisasContext *s, DisasOps *o)
     return NO_EXIT;
 }
 
+static ExitStatus op_siga(DisasContext *s, DisasOps *o)
+{
+    check_privileged(s);
+    /* From KVM code: Not provided, set CC = 3 for subchannel not operational */
+    gen_op_movi_cc(s, 3);
+    return NO_EXIT;
+}
+
 static ExitStatus op_stcps(DisasContext *s, DisasOps *o)
 {
     check_privileged(s);