target/s390x: fix execution with icount

This patch adds some gen_io_start() calls to allow execution
of s390x targets in icount mode with -smp 1.
It enables deterministic timers and record/replay features.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Pavel Dovgalyuk <pavel.dovgalyuk@ispras.ru>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Acked-by: David Hildenbrand <david@redhat.com>
Message-Id: <160455551747.32240.17074484658979970129.stgit@pasha-ThinkPad-X280>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>

2 files changed, 50 insertions, 35 deletions

diff --git a/target/s390x/insn-data.def b/target/s390x/insn-data.def
index d3bcdfd67b..b95bc98d35 100644
--- a/target/s390x/insn-data.def
+++ b/target/s390x/insn-data.def
@@ -379,7 +379,7 @@
 /* EXTRACT CPU ATTRIBUTE */
     C(0xeb4c, ECAG,    RSY_a, GIE, 0, a2, r1, 0, ecag, 0)
 /* EXTRACT CPU TIME */
-    C(0xc801, ECTG,    SSF,   ECT, 0, 0, 0, 0, ectg, 0)
+    F(0xc801, ECTG,    SSF,   ECT, 0, 0, 0, 0, ectg, 0, IF_IO)
 /* EXTRACT FPC */
     F(0xb38c, EFPC,    RRE,   Z,   0, 0, new, r1_32, efpc, 0, IF_BFP)
 /* EXTRACT PSW */
@@ -855,10 +855,10 @@
     C(0xe32f, STRVG,   RXY_a, Z,   la2, r1_o, new, m1_64, rev64, 0)
 
 /* STORE CLOCK */
-    C(0xb205, STCK,    S,     Z,   la2, 0, new, m1_64, stck, 0)
-    C(0xb27c, STCKF,   S,     SCF, la2, 0, new, m1_64, stck, 0)
+    F(0xb205, STCK,    S,     Z,   la2, 0, new, m1_64, stck, 0, IF_IO)
+    F(0xb27c, STCKF,   S,     SCF, la2, 0, new, m1_64, stck, 0, IF_IO)
 /* STORE CLOCK EXTENDED */
-    C(0xb278, STCKE,   S,     Z,   0, a2, 0, 0, stcke, 0)
+    F(0xb278, STCKE,   S,     Z,   0, a2, 0, 0, stcke, 0, IF_IO)
 
 /* STORE FACILITY LIST EXTENDED */
     C(0xb2b0, STFLE,   S,  SFLE,   0, a2, 0, 0, stfle, 0)
@@ -1269,7 +1269,7 @@
     E(0xb250, CSP,     RRE,   Z,   r1_32u, ra2, r1_P, 0, csp, 0, MO_TEUL, IF_PRIV)
     E(0xb98a, CSPG,    RRE, DAT_ENH, r1_o, ra2, r1_P, 0, csp, 0, MO_TEQ, IF_PRIV)
 /* DIAGNOSE (KVM hypercall) */
-    F(0x8300, DIAG,    RSI,   Z,   0, 0, 0, 0, diag, 0, IF_PRIV)
+    F(0x8300, DIAG,    RSI,   Z,   0, 0, 0, 0, diag, 0, IF_PRIV | IF_IO)
 /* INSERT STORAGE KEY EXTENDED */
     F(0xb229, ISKE,    RRE,   Z,   0, r2_o, new, r1_8, iske, 0, IF_PRIV)
 /* INVALIDATE DAT TABLE ENTRY */
@@ -1301,17 +1301,17 @@
 /* RESET REFERENCE BIT EXTENDED */
     F(0xb22a, RRBE,    RRE,   Z,   0, r2_o, 0, 0, rrbe, 0, IF_PRIV)
 /* SERVICE CALL LOGICAL PROCESSOR (PV hypercall) */
-    F(0xb220, SERVC,   RRE,   Z,   r1_o, r2_o, 0, 0, servc, 0, IF_PRIV)
+    F(0xb220, SERVC,   RRE,   Z,   r1_o, r2_o, 0, 0, servc, 0, IF_PRIV | IF_IO)
 /* SET ADDRESS SPACE CONTROL FAST */
     F(0xb279, SACF,    S,     Z,   0, a2, 0, 0, sacf, 0, IF_PRIV)
 /* SET CLOCK */
-    F(0xb204, SCK,     S,     Z,   la2, 0, 0, 0, sck, 0, IF_PRIV)
+    F(0xb204, SCK,     S,     Z,   la2, 0, 0, 0, sck, 0, IF_PRIV | IF_IO)
 /* SET CLOCK COMPARATOR */
-    F(0xb206, SCKC,    S,     Z,   0, m2_64a, 0, 0, sckc, 0, IF_PRIV)
+    F(0xb206, SCKC,    S,     Z,   0, m2_64a, 0, 0, sckc, 0, IF_PRIV | IF_IO)
 /* SET CLOCK PROGRAMMABLE FIELD */
     F(0x0107, SCKPF,   E,     Z,   0, 0, 0, 0, sckpf, 0, IF_PRIV)
 /* SET CPU TIMER */
-    F(0xb208, SPT,     S,     Z,   0, m2_64a, 0, 0, spt, 0, IF_PRIV)
+    F(0xb208, SPT,     S,     Z,   0, m2_64a, 0, 0, spt, 0, IF_PRIV | IF_IO)
 /* SET PREFIX */
     F(0xb210, SPX,     S,     Z,   0, m2_32ua, 0, 0, spx, 0, IF_PRIV)
 /* SET PSW KEY FROM ADDRESS */
@@ -1321,7 +1321,7 @@
 /* SET SYSTEM MASK */
     F(0x8000, SSM,     S,     Z,   0, m2_8u, 0, 0, ssm, 0, IF_PRIV)
 /* SIGNAL PROCESSOR */
-    F(0xae00, SIGP,    RS_a,  Z,   0, a2, 0, 0, sigp, 0, IF_PRIV)
+    F(0xae00, SIGP,    RS_a,  Z,   0, a2, 0, 0, sigp, 0, IF_PRIV | IF_IO)
 /* STORE CLOCK COMPARATOR */
     F(0xb207, STCKC,   S,     Z,   la2, 0, new, m1_64a, stckc, 0, IF_PRIV)
 /* STORE CONTROL */
@@ -1332,7 +1332,7 @@
 /* STORE CPU ID */
     F(0xb202, STIDP,   S,     Z,   la2, 0, new, m1_64a, stidp, 0, IF_PRIV)
 /* STORE CPU TIMER */
-    F(0xb209, STPT,    S,     Z,   la2, 0, new, m1_64a, stpt, 0, IF_PRIV)
+    F(0xb209, STPT,    S,     Z,   la2, 0, new, m1_64a, stpt, 0, IF_PRIV | IF_IO)
 /* STORE FACILITY LIST */
     F(0xb2b1, STFL,    S,     Z,   0, 0, 0, 0, stfl, 0, IF_PRIV)
 /* STORE PREFIX */
@@ -1352,35 +1352,35 @@
     C(0xe501, TPROT,   SSE,   Z,   la1, a2, 0, 0, tprot, 0)
 
 /* CCW I/O Instructions */
-    F(0xb276, XSCH,    S,     Z,   0, 0, 0, 0, xsch, 0, IF_PRIV)
-    F(0xb230, CSCH,    S,     Z,   0, 0, 0, 0, csch, 0, IF_PRIV)
-    F(0xb231, HSCH,    S,     Z,   0, 0, 0, 0, hsch, 0, IF_PRIV)
-    F(0xb232, MSCH,    S,     Z,   0, insn, 0, 0, msch, 0, IF_PRIV)
-    F(0xb23b, RCHP,    S,     Z,   0, 0, 0, 0, rchp, 0, IF_PRIV)
-    F(0xb238, RSCH,    S,     Z,   0, 0, 0, 0, rsch, 0, IF_PRIV)
-    F(0xb237, SAL,     S,     Z,   0, 0, 0, 0, sal, 0, IF_PRIV)
-    F(0xb23c, SCHM,    S,     Z,   0, insn, 0, 0, schm, 0, IF_PRIV)
-    F(0xb274, SIGA,    S,     Z,   0, 0, 0, 0, siga, 0, IF_PRIV)
-    F(0xb23a, STCPS,   S,     Z,   0, 0, 0, 0, stcps, 0, IF_PRIV)
-    F(0xb233, SSCH,    S,     Z,   0, insn, 0, 0, ssch, 0, IF_PRIV)
-    F(0xb239, STCRW,   S,     Z,   0, insn, 0, 0, stcrw, 0, IF_PRIV)
-    F(0xb234, STSCH,   S,     Z,   0, insn, 0, 0, stsch, 0, IF_PRIV)
-    F(0xb236, TPI ,    S,     Z,   la2, 0, 0, 0, tpi, 0, IF_PRIV)
-    F(0xb235, TSCH,    S,     Z,   0, insn, 0, 0, tsch, 0, IF_PRIV)
+    F(0xb276, XSCH,    S,     Z,   0, 0, 0, 0, xsch, 0, IF_PRIV | IF_IO)
+    F(0xb230, CSCH,    S,     Z,   0, 0, 0, 0, csch, 0, IF_PRIV | IF_IO)
+    F(0xb231, HSCH,    S,     Z,   0, 0, 0, 0, hsch, 0, IF_PRIV | IF_IO)
+    F(0xb232, MSCH,    S,     Z,   0, insn, 0, 0, msch, 0, IF_PRIV | IF_IO)
+    F(0xb23b, RCHP,    S,     Z,   0, 0, 0, 0, rchp, 0, IF_PRIV | IF_IO)
+    F(0xb238, RSCH,    S,     Z,   0, 0, 0, 0, rsch, 0, IF_PRIV | IF_IO)
+    F(0xb237, SAL,     S,     Z,   0, 0, 0, 0, sal, 0, IF_PRIV | IF_IO)
+    F(0xb23c, SCHM,    S,     Z,   0, insn, 0, 0, schm, 0, IF_PRIV | IF_IO)
+    F(0xb274, SIGA,    S,     Z,   0, 0, 0, 0, siga, 0, IF_PRIV | IF_IO)
+    F(0xb23a, STCPS,   S,     Z,   0, 0, 0, 0, stcps, 0, IF_PRIV | IF_IO)
+    F(0xb233, SSCH,    S,     Z,   0, insn, 0, 0, ssch, 0, IF_PRIV | IF_IO)
+    F(0xb239, STCRW,   S,     Z,   0, insn, 0, 0, stcrw, 0, IF_PRIV | IF_IO)
+    F(0xb234, STSCH,   S,     Z,   0, insn, 0, 0, stsch, 0, IF_PRIV | IF_IO)
+    F(0xb236, TPI ,    S,     Z,   la2, 0, 0, 0, tpi, 0, IF_PRIV | IF_IO)
+    F(0xb235, TSCH,    S,     Z,   0, insn, 0, 0, tsch, 0, IF_PRIV | IF_IO)
     /* ??? Not listed in PoO ninth edition, but there's a linux driver that
        uses it: "A CHSC subchannel is usually present on LPAR only."  */
-    F(0xb25f, CHSC,  RRE,     Z,   0, insn, 0, 0, chsc, 0, IF_PRIV)
+    F(0xb25f, CHSC,  RRE,     Z,   0, insn, 0, 0, chsc, 0, IF_PRIV | IF_IO)
 
 /* zPCI Instructions */
     /* None of these instructions are documented in the PoP, so this is all
        based upon target/s390x/kvm.c and Linux code and likely incomplete */
-    F(0xebd0, PCISTB, RSY_a, PCI, la2, 0, 0, 0, pcistb, 0, IF_PRIV)
-    F(0xebd1, SIC, RSY_a, AIS, r1, r3, 0, 0, sic, 0, IF_PRIV)
-    F(0xb9a0, CLP, RRF_c, PCI, 0, 0, 0, 0, clp, 0, IF_PRIV)
-    F(0xb9d0, PCISTG, RRE, PCI, 0, 0, 0, 0, pcistg, 0, IF_PRIV)
-    F(0xb9d2, PCILG, RRE, PCI, 0, 0, 0, 0, pcilg, 0, IF_PRIV)
-    F(0xb9d3, RPCIT, RRE, PCI, 0, 0, 0, 0, rpcit, 0, IF_PRIV)
-    F(0xe3d0, MPCIFC, RXY_a, PCI, la2, 0, 0, 0, mpcifc, 0, IF_PRIV)
-    F(0xe3d4, STPCIFC, RXY_a, PCI, la2, 0, 0, 0, stpcifc, 0, IF_PRIV)
+    F(0xebd0, PCISTB, RSY_a, PCI, la2, 0, 0, 0, pcistb, 0, IF_PRIV | IF_IO)
+    F(0xebd1, SIC, RSY_a, AIS, r1, r3, 0, 0, sic, 0, IF_PRIV | IF_IO)
+    F(0xb9a0, CLP, RRF_c, PCI, 0, 0, 0, 0, clp, 0, IF_PRIV | IF_IO)
+    F(0xb9d0, PCISTG, RRE, PCI, 0, 0, 0, 0, pcistg, 0, IF_PRIV | IF_IO)
+    F(0xb9d2, PCILG, RRE, PCI, 0, 0, 0, 0, pcilg, 0, IF_PRIV | IF_IO)
+    F(0xb9d3, RPCIT, RRE, PCI, 0, 0, 0, 0, rpcit, 0, IF_PRIV | IF_IO)
+    F(0xe3d0, MPCIFC, RXY_a, PCI, la2, 0, 0, 0, mpcifc, 0, IF_PRIV | IF_IO)
+    F(0xe3d4, STPCIFC, RXY_a, PCI, la2, 0, 0, 0, stpcifc, 0, IF_PRIV | IF_IO)
 
 #endif /* CONFIG_USER_ONLY */
diff --git a/target/s390x/translate.c b/target/s390x/translate.c
index ac10f42f10..be32938f6d 100644
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -1214,6 +1214,7 @@ typedef struct {
 #define IF_DFP      0x0010      /* decimal floating point instruction */
 #define IF_PRIV     0x0020      /* privileged instruction */
 #define IF_VEC      0x0040      /* vector instruction */
+#define IF_IO       0x0080      /* input/output instruction */
 
 struct DisasInsn {
     unsigned opc:16;
@@ -6369,6 +6370,7 @@ static DisasJumpType translate_one(CPUS390XState *env, DisasContext *s)
     const DisasInsn *insn;
     DisasJumpType ret = DISAS_NEXT;
     DisasOps o = {};
+    bool icount = false;
 
     /* Search for the insn in the table.  */
     insn = extract_insn(env, s);
@@ -6435,6 +6437,14 @@ static DisasJumpType translate_one(CPUS390XState *env, DisasContext *s)
                 return DISAS_NORETURN;
             }
         }
+
+        /* input/output is the special case for icount mode */
+        if (unlikely(insn->flags & IF_IO)) {
+            icount = tb_cflags(s->base.tb) & CF_USE_ICOUNT;
+            if (icount) {
+                gen_io_start();
+            }
+        }
     }
 
     /* Check for insn specification exceptions.  */
@@ -6488,6 +6498,11 @@ static DisasJumpType translate_one(CPUS390XState *env, DisasContext *s)
         tcg_temp_free_i64(o.addr1);
     }
 
+    /* io should be the last instruction in tb when icount is enabled */
+    if (unlikely(icount && ret == DISAS_NEXT)) {
+        ret = DISAS_PC_STALE;
+    }
+
 #ifndef CONFIG_USER_ONLY
     if (s->base.tb->flags & FLAG_MASK_PER) {
         /* An exception might be triggered, save PSW if not already done.  */