Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* kernel header update (requested by David and Vijay)
* GuestPanicInformation fixups (Anton)
* record/replay icount fixes (Pavel)
* cpu-exec cleanup, unification of icount_decr with tcg_exit_req (me)
* KVM_CAP_IMMEDIATE_EXIT support (me)
* vmxcap update (me)
* iscsi locking fix (me)
* VFIO ram device fix (Yongji)
* scsi-hd vs. default CD-ROM (Hervé)
* SMI migration fix (Dave)
* spice-char segfault (Li Qiang)
* improved "info mtree -f" (me)

# gpg: Signature made Fri 03 Mar 2017 15:43:04 GMT
# gpg:                using RSA key 0xBFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream: (21 commits)
  iscsi: fix missing unlock
  memory: show region offset and ROM/RAM type in "info mtree -f"
  x86: Work around SMI migration breakages
  spice-char: fix segfault in char_spice_finalize
  vl: disable default cdrom when using explicitely scsi-hd
  memory: Introduce DEVICE_HOST_ENDIAN for ram device
  qmp-events: fix GUEST_PANICKED description formatting
  qapi: flatten GuestPanicInformation union
  vmxcap: update for September 2016 SDM
  vmxcap: port to Python 3
  KVM: use KVM_CAP_IMMEDIATE_EXIT
  kvm: use atomic_read/atomic_set to access cpu->exit_request
  KVM: move SIG_IPI handling to kvm-all.c
  KVM: do not use sigtimedwait to catch SIGBUS
  KVM: remove kvm_arch_on_sigbus
  cpus: reorganize signal handling code
  KVM: x86: cleanup SIGBUS handlers
  cpus: remove ugly cast on sigbus_handler
  cpu-exec: remove unnecessary check of cpu->exit_request
  replay: check icount in cpu exec loop
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

2 files changed, 31 insertions, 28 deletions

diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h
index 8c305aa4fa..b62f0d82e4 100644
--- a/include/exec/cpu-common.h
+++ b/include/exec/cpu-common.h
@@ -36,6 +36,12 @@ enum device_endian {
     DEVICE_LITTLE_ENDIAN,
 };
 
+#if defined(HOST_WORDS_BIGENDIAN)
+#define DEVICE_HOST_ENDIAN DEVICE_BIG_ENDIAN
+#else
+#define DEVICE_HOST_ENDIAN DEVICE_LITTLE_ENDIAN
+#endif
+
 /* address in the RAM (different from a physical address) */
 #if defined(CONFIG_XEN_BACKEND)
 typedef uint64_t ram_addr_t;
diff --git a/include/exec/gen-icount.h b/include/exec/gen-icount.h
index 050de59b38..62d462e494 100644
--- a/include/exec/gen-icount.h
+++ b/include/exec/gen-icount.h
@@ -6,58 +6,55 @@
 /* Helpers for instruction counting code generation.  */
 
 static int icount_start_insn_idx;
-static TCGLabel *icount_label;
 static TCGLabel *exitreq_label;
 
 static inline void gen_tb_start(TranslationBlock *tb)
 {
-    TCGv_i32 count, flag, imm;
+    TCGv_i32 count, imm;
 
     exitreq_label = gen_new_label();
-    flag = tcg_temp_new_i32();
-    tcg_gen_ld_i32(flag, cpu_env,
-                   offsetof(CPUState, tcg_exit_req) - ENV_OFFSET);
-    tcg_gen_brcondi_i32(TCG_COND_NE, flag, 0, exitreq_label);
-    tcg_temp_free_i32(flag);
-
-    if (!(tb->cflags & CF_USE_ICOUNT)) {
-        return;
+    if (tb->cflags & CF_USE_ICOUNT) {
+        count = tcg_temp_local_new_i32();
+    } else {
+        count = tcg_temp_new_i32();
     }
 
-    icount_label = gen_new_label();
-    count = tcg_temp_local_new_i32();
     tcg_gen_ld_i32(count, cpu_env,
                    -ENV_OFFSET + offsetof(CPUState, icount_decr.u32));
 
-    imm = tcg_temp_new_i32();
-    /* We emit a movi with a dummy immediate argument. Keep the insn index
-     * of the movi so that we later (when we know the actual insn count)
-     * can update the immediate argument with the actual insn count.  */
-    icount_start_insn_idx = tcg_op_buf_count();
-    tcg_gen_movi_i32(imm, 0xdeadbeef);
+    if (tb->cflags & CF_USE_ICOUNT) {
+        imm = tcg_temp_new_i32();
+        /* We emit a movi with a dummy immediate argument. Keep the insn index
+         * of the movi so that we later (when we know the actual insn count)
+         * can update the immediate argument with the actual insn count.  */
+        icount_start_insn_idx = tcg_op_buf_count();
+        tcg_gen_movi_i32(imm, 0xdeadbeef);
+
+        tcg_gen_sub_i32(count, count, imm);
+        tcg_temp_free_i32(imm);
+    }
+
+    tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, exitreq_label);
 
-    tcg_gen_sub_i32(count, count, imm);
-    tcg_temp_free_i32(imm);
+    if (tb->cflags & CF_USE_ICOUNT) {
+        tcg_gen_st16_i32(count, cpu_env,
+                         -ENV_OFFSET + offsetof(CPUState, icount_decr.u16.low));
+    }
 
-    tcg_gen_brcondi_i32(TCG_COND_LT, count, 0, icount_label);
-    tcg_gen_st16_i32(count, cpu_env,
-                     -ENV_OFFSET + offsetof(CPUState, icount_decr.u16.low));
     tcg_temp_free_i32(count);
 }
 
 static void gen_tb_end(TranslationBlock *tb, int num_insns)
 {
-    gen_set_label(exitreq_label);
-    tcg_gen_exit_tb((uintptr_t)tb + TB_EXIT_REQUESTED);
-
     if (tb->cflags & CF_USE_ICOUNT) {
         /* Update the num_insn immediate parameter now that we know
          * the actual insn count.  */
         tcg_set_insn_param(icount_start_insn_idx, 1, num_insns);
-        gen_set_label(icount_label);
-        tcg_gen_exit_tb((uintptr_t)tb + TB_EXIT_ICOUNT_EXPIRED);
     }
 
+    gen_set_label(exitreq_label);
+    tcg_gen_exit_tb((uintptr_t)tb + TB_EXIT_REQUESTED);
+
     /* Terminate the linked list.  */
     tcg_ctx.gen_op_buf[tcg_ctx.gen_op_buf[0].prev].next = 0;
 }