[v2,for-2.12,07/10] s390x/tcg: Implement SIGNAL ADAPTER instruction

Message ID 20171207165355.7559-8-david@redhat.com
State New
Headers show
Series
  • s390x/tcg: facilitites and instructions
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Commit Message

David Hildenbrand Dec. 7, 2017, 4:53 p.m.
KVM suppresses SIGA, setting cc=3. Let's do the same for TCG, so we're at
least equal.

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 target/s390x/insn-data.def | 1 +
 target/s390x/translate.c   | 8 ++++++++
 2 files changed, 9 insertions(+)

Comments

Richard Henderson Dec. 7, 2017, 11:49 p.m. | #1
On 12/07/2017 08:53 AM, David Hildenbrand wrote:
> KVM suppresses SIGA, setting cc=3. Let's do the same for TCG, so we're at
> least equal.
> 
> Signed-off-by: David Hildenbrand <david@redhat.com>
> ---
>  target/s390x/insn-data.def | 1 +
>  target/s390x/translate.c   | 8 ++++++++
>  2 files changed, 9 insertions(+)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~

Patch

diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
index c7353e7f11..f7b66b0091 100644
--- 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 5c2432678c..1e4079464a 100644
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -4102,6 +4102,14 @@  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);