[Qemu-devel] [PATCH 07/17] s390x: Enable s390x-softmmu target

[Alexander Graf <agraf@suse.de>]

This patch adds some code paths for running s390x guest OSs without the
need for KVM.

Signed-off-by: Alexander Graf <agraf@suse.de>

---

v3 -> v4:

  - declare non-working when EXT is masked
  - remove obsolete cpu_halted
---
 cpu-exec.c            |    8 ++++++++
 target-s390x/exec.h   |   11 ++++++++++-
 target-s390x/helper.c |    4 ++++
 3 files changed, 22 insertions(+), 1 deletions(-)

diff --git a/cpu-exec.c b/cpu-exec.c
index 5d6c9a8..d57afef 100644
--- a/cpu-exec.c
+++ b/cpu-exec.c
@@ -346,6 +346,8 @@ int cpu_exec(CPUState *env1)
                     do_interrupt(env);
 #elif defined(TARGET_M68K)
                     do_interrupt(0);
+#elif defined(TARGET_S390X)
+                    do_interrupt(env);
 #endif
                     env->exception_index = -1;
 #endif
@@ -560,6 +562,12 @@ int cpu_exec(CPUState *env1)
                         do_interrupt(1);
                         next_tb = 0;
                     }
+#elif defined(TARGET_S390X) && !defined(CONFIG_USER_ONLY)
+                    if ((interrupt_request & CPU_INTERRUPT_HARD) &&
+                        (env->psw.mask & PSW_MASK_EXT)) {
+                        do_interrupt(env);
+                        next_tb = 0;
+                    }
 #endif
                    /* Don't use the cached interupt_request value,
                       do_interrupt may have updated the EXITTB flag. */
diff --git a/target-s390x/exec.h b/target-s390x/exec.h
index f7893f3..7a87fff 100644
--- a/target-s390x/exec.h
+++ b/target-s390x/exec.h
@@ -31,7 +31,16 @@ register struct CPUS390XState *env asm(AREG0);
 
 static inline int cpu_has_work(CPUState *env)
 {
-    return env->interrupt_request & CPU_INTERRUPT_HARD; // guess
+    return ((env->interrupt_request & CPU_INTERRUPT_HARD) &&
+            (env->psw.mask & PSW_MASK_EXT));
+}
+
+static inline void regs_to_env(void)
+{
+}
+
+static inline void env_to_regs(void)
+{
 }
 
 static inline void cpu_pc_from_tb(CPUState *env, TranslationBlock* tb)
diff --git a/target-s390x/helper.c b/target-s390x/helper.c
index 4a5297b..629dfd9 100644
--- a/target-s390x/helper.c
+++ b/target-s390x/helper.c
@@ -82,3 +82,7 @@ int cpu_s390x_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
     return 0;
 }
 #endif /* CONFIG_USER_ONLY */
+
+void do_interrupt (CPUState *env)
+{
+}
-- 
1.6.0.2